SRT

Series



Instruction Manual





TWO-STAGE SCREW REFRIGERATION COMPRESSOR

















R-SRT-EC1-201108


Fu Sheng Industrial Co., Ltd.


1
CONTENTS
PREFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
I . SRT FEATURES OF SRT SERI ES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1. 1 Superi or compact st ruct ure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1. 2 Rot ors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1. 3 Beari ngs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1. 4 Suct i on f i l t er . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1. 5 Dri vi ng mot or . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1. 6 Capaci t y cont rol and sol enoi d val ves . . . . . . . . . . . . . . . . . . 11
2. Capaci t y and cont rol syst em . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2. 1 Three st eps capaci t y cont rol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2. 2 Li near capaci t y cont rol 16
I I .
SCREW REFRI GERANT COMPRESSOR SPECI FI CATI ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
1. PRODUCT SPECI FI CATI ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2. I NSTALLATI ON AND COMMI SSI ON SPECI FI CATI ON . . . . . . . 19
2. 1 I nst al l t he compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2. 2 I t ems t o be checked bef ore st art up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2. 3 Not i ces i n operat i on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2. 4 Not i ces duri ng f act ory t est . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2. 5 /
Recommended cont rol sequence of compressor START/ STOP . . . . . . . . . . . . . . . . 25
3. OPERATI ON SPECI FI CATI ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3. 1 Operat i on range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3. 2 Operat i on l i mi t at i on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3. 3 Power suppl y qual i t y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3. 4 Saf et y devi ce i n operat i on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4. ELECTRI C SPECI FI CATI ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4. 1 El ect ri c wi ri ng conf i gurat i on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4. 2 St art -up process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4. 3 Not i ce when adopt i ng capaci t or . . . . . . . . . . . . . . . . . . . . . . . . . 31
4. 4 (NFB) NFB sel ect i on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4. 5 MC Magnet i c cont act or(MC) sel ect i on . . . . . . . . . . . . . . . . . . . . . . 31
4. 6 El ect ri cal dat a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5. TROUBLE SHOOTING AND MAINTENANCE PERIOD . . . . . . . . . . 34
5. 1 Troubl e shoot i ng . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5. 2 Recommended mai nt enance peri od . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
2
5. 3 When t he mot or i s burnt out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5. 4 PUMP DOWN Not i ces on pump-down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6. APPLI CATI ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6. 1 Li qui d i nj ect i on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6. 2 Oi l cool er. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6. 3 Economi zer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6. 4 Operat i on envel ope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . 44
7. PRODUCT SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 47
7. 1 Fi t t i ng speci f i cat i on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
7. 2 Fi t t i ng l i st . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7. 3 Lubri cant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
7. 4 Compressor out l i ne di mensi on. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
7. 5 Servi ce val ve di mensi on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53



3
Preface

From air conditioning systems, hi tech clean
room, climate control room to food
refrigeration systems, Fu Sheng screw
refrigerant compressors have been the best
choice of various application systems.


SRT

In order to meet demands for various working
condition from clients, Fu Sheng has
particularly developed the SRTseries of
screw refrigerant compressors to satisfy each
clients unique application condition and
design specification. With SRT series chiller
makers can easily optimize their chiller
performance and conformity to the
environmental protection requirement of high
energy efficiency.

I SO 9001 I SO14000
OHSAS-18000I SO1461-1
TOSHMS
, 2010

After years of practice and working with
clients, our compressors have acquired
numerous appreciations from various
domestic and international institutes; such as
the ISO9001, ISO14000, OHSAS-18000,
ISO1461-1, TOAHMSand Symbol of
Excellence Award (Taiwan), 2010 industry
Innovation Achievement Award(Taiwan) etc.

I n order t o sat i sf y our cl i ent s prospect of
compressors wi t h hi gh qual i t y and
ef f i ci ency, Fu Sheng Co. has i nvest ed
si gni f i cant resources t o i nt roduce t he
st at e-of -art screw rot or gri ndi ng machi nes
and coordi nat ed measuri ng machi nes i n
t he product i on process.

Our mot t o i s t o provi de our val ue

cust omers screw ref ri gerant compressors
4

beari ng bet t er compet i t i ve edge,
perf ormance and qual i t y t o i ncrease
sat i sf act i ons f rom cust omers or even t o.

SRT
SRT

SRT

Thi s i nst ruct i on manual i s prepared t o
ensure t hat users can operat e or i nst al l Fu
Sheng SRTscrew ref ri gerant
compressors correct l y. Reader wi l l f i nd
SRT seri es i nf ormat i on about t he f eat ures,
t he pri nci pl es of compressor i nst al l at i on,
operat i on, t roubl e shoot i ng, and l i mi t at i on
i n operat i on. Pl ease read t hi s Manual
caref ul l y and f ol l ow t he not es and
speci f i cat i on i l l ust rat ed i n t hi s Manual
bef ore operat i ng t he compressors.

Shoul d you have any quest i ons or need
any hel p, pl ease do not hesi t at e t o cont act
us. We wi l l provi de you wi t h assi st ance
and answer i mmedi at el y.




5

I . SRT I . FEARURES OFSRTSERI ES
:

.


.



Mechani sm:
Newl y asymmet ri cal rot or prof i l e,
best t oot h rat i o 5: 6, t he compressor
provi des hi gh ef f i ci ency i n operat i on.
Preci se cases and rot ors are
machi ned i n cl i mat e cont rol room
New generat i on rot or prof i l e
provi des hi gh ri gi di t y.
Prof essi onal manuf act uri ng
t echnol ogy ensures hi gh accuracy
qual i t y.

.
3 PTC


Hi gh ef f i ci ency el ect ri cal mot or
Bui l t -i n 3 PTC t hermi st or
sensors.
Speci al desi gn of ref ri gerant
cool i ng f l ow passage.

.



Long servi ce l i f e of beari ngs wi t h
suf f i ci ent l ubri cat i on
The axi al beari ngs provi de more
durabi l i t y.
Bui l t -i n oi l channel provi des
perf ect l ubri cat i on.

.



Low vi brat i on and di scharge pul se.
Li mi t ed mot i on part s.
No need t o use di scharge val ve.


.



Bui l t -i n hi gh ef f i ci ency oi l
separat or wi t h l arge area f i l t rat i on.
I nnovat i ve desi gn of oi l
separat or.
Equi pped wi t h hi gh ef f i ci ency oi l
f i l t er.
6
Vi




Fl exi bl e capaci t y cont rol
Dedi cat ed desi gn of sl i der.
Preci sel y cont rol t he l oadi ng by
sol enoi d val ves.


.


Mount i ng suct i on port can be
rot at ed t o di f f erent pi pi ng angl e.
I t i s conveni ent f or t he pi pi ng of
package.

(R-22, R-404A,
R-507, .



COP


Sui t abl e f or each ki nd of
ref ri gerant (R-22, R-404A, R-507)
I t i s possi bl e f or t he package
syst em t o operat e at i t s best
ef f i ci ency.
Opt i mi zed vol ume rat i o desi gn.
Mat ched wi t h di f f erent oi l .
Opt i mi zed mot or si ze.
Excel l ent COP.
Wi de appl i cat i on range.

.
60Hz267~516m
3
/ hr
50Hz222~430m
3
/ hr

Di spl acement range
60Hz(267 t o 516 m
3
/ hr)
50Hz(222 t o 430 m
3
/ hr)

:
PTC
PTC




El ect ri cal cont rol and prot ect i on devi ce:
PTC di scharge t emperat ure
moni t or sensor.
PTC mot or t emperat ure moni t or
sensor.
Power phase sequence moni t or.
Power phase l oss moni t or.
Abnormal vol t age det ect i on.




7

:


I NT69FSY






St andard f i t t i ngs:
Di scharge check val ve
Large si ze suct i on f i l t er.
I NT69FSY el ect ri cal prot ect i on
modul e.
Reserved l i qui d i nj ect i on
adapt ers at mi ddl e pressure
si de and l ow pressure si de.
Economi zer connect i on f l ange
Suct i on servi ce val ve
Di scharge servi ce val ve
Di scharge t emperat ure moni t or
sensor



:











Compl et e opt i onal f i t t i ngs:
Li qui d i nj ect i on sol enoi d val ve
Li qui d i nj ect i on capi l l ary.
Ant i -vi brat i on mount i ng pad.
Saf et y val ve.
Economi zer adapt er
Oi l separat or
Oi l si ght gl ass
Oi l heat er
Oi l drai ni ng val ve
Oi l l evel swi t ch


8

1. 1 1. 1 Superi or compact st ruct ure
. Compressor structure showed as figure 1.


SRT 3

Modul ar desi gn
Casi ng i s t he maj or component of screw
ref ri gerant compressor. SRT seri es has
3 model s whi ch meet vari ous demands
and appl i cat i ons.


M/ C

SRT


Hi gh Accuracy
To reach high operation efficiency, the casing is
manufactured by precise machining centers and
inspected by a coordinate measuring machine to
make sure that the requested precision and quality
can be retained in the compressor.




Doubl e-l ayered desi gn
The double-layered design casing made by high
strength cast iron not only can endure intensive
high pressure but also reduce noise level while in
operation.
1. 2

1. 2 Rot ors

56

Opt i mi zat i on
Fusheng compressor adopt s t he l at est
mul t i -nat i onal pat ent ed asymmet ri c rot or
prof i l e (t oot h rat i o 5: 6). The rot ors are
machi ned by advanced CNC gri ndi ng
machi ne t o reach t hei r accuracy and
qual i t y.

Hi gh ef f i ci ency
Under continuous operation, the rotors still keep
their best clearance and achieve highest efficiency.



9

:
Fi gur e 1: Compr essor st ruct ure


10

1. 3

1. 3 Beari ngs

Long servi ce l i f e
Hi gh-preci si on l arge-si zed axi al and radi al
beari ngs are sel ect ed t o support t he mal e
and f emal e rot ors f or l ong l ast i ng l i f e.
Wi t h ef f ect i ve l ubri cat i on syst em, t he
beari ng servi ce l i f e can be f urt her
ext ended. Whi l e t he compressor i s
runni ng, l ubri cant i s i nj ect ed i nt o al l
beari ngs due t o pressure di f f erence.

1. 4

1.4 Suction filter

,

Large suct i on wi t h l ow pressure drop.

Rel i abl e and saf e prot ect i on
I nst al l ed at t he suct i on end of t he
compressor, t he f i l t er prevent s f orei gn
obj ect s or cont ami nat ed part i cl es f rom
ent eri ng t he compressor and guarant ees
t he normal operat i on of compressor. We
recommend di smant l i ng and cl eani ng t he
f i l t er compl et el y short l y af t er t he
commi ssi on of compressor t o ensure t he
ongoi ng normal operat i on and prol ong
operat i ng l i f et i me.

1. 5
F

PTC I NT69FSY

(st ar del t a)

1. 5 Dri vi ng mot or
Hi gh-ef f i ci ent t wo-pol e, t hree-phase,
cl ass F i nduct i ve mot or.
Wi t h bui l t -i n PTC t hermi st or I NT69FSY
el ect ri cal prot ect i on modul e t o moni t or
t he wi ndi ng t emperat ure of compressor
mot or cl osel y, t he compressor i s i nsured
t o run under normal condi t i on. I t s
sui t abl e f or st ar-del t a or di rect -on-l i ne
st art -up.




11
1. 6

1. 6 Capaci t y-cont rol pi st on and sol enoi d
val ves
The capaci t y-cont rol sl i der val ve
mechani sm accurat el y cont rol s t he
requi red ref ri gerant f l ow respondi ng t o
t he syst em l oadi ng vari at i on.
The compressor provi des 3-st ep
capaci t y cont rol as a st andard. The
l i near capaci t y cont rol i s al so
avai l abl e as an opt i on.
For speci al operat i on condi t i ons, t here
are vari ous bui l t -i n vol ume rat i os t o be
adopt ed. Thi s l eads t o hi gh energy
ef f i ci ency.



12
. . Capaci t y cont rol syst em
. 1 . 1 Three-st ep capaci t y cont rol
4

25%50%100%

The 3-st ep capaci t y cont rol syst em i s
made of one sl i der, f our sol enoi d val ves
and one pi st on wi t h adj ust abl e range of
25%, 50%, and 100%.
The pri nci pl e of capaci t y cont rol i s by
movi ng t he sl i der t o al l ow part i al
ref ri gerant t o bypass back t o t he i nt ake
and regul at e t he ref ri gerant f l ow.


Capaci t y-cont rol di agram




Sol enoi d val ve act i vat i ng t abl e of
t hree-st age capaci t y cont rol



SV1
()
SV50
()
SV100
()
SV0
()
25%(
)
ON OFF ON ON
50% OFF ON ON ON
100 OFF OFF OFF OFF

s. v.
St at us
SV1
(NC)
SV50
(NC)
SV100
(NO)
SV0
(NC)
25%(st ar
up)
ON OFF ON ON
50% OFF ON ON ON
100 OFF OFF OFF OFF

ON, OFF ON: energi ze, OFF: de-energi ze


13

. 1. 1 25%

25%
25
30

. 1. 1 St art up: 25% l oadi ng
For easi er st art up of compressor, t he
l oadi ng must be mi ni mi zed. Theref ore,
SV1 i s energi zed t o bypass oi l t o t he
l ow-pressure si de di rect l y. The sl i der
does not move and keep t he maxi mum
openi ng i n suct i on end t o bypass t he
ref ri gerant . Af t er t he compl et i on of
st art up t he compressor t hen can i ncrease
l oadi ng gradual l y by de-energi zi ng t he
SV1 sol enoi d val ve. I t i s recommended t o
run compressor at 25% l oadi ng f or about
30 seconds bef ore st art i ng t o i ncrease
l oadi ng.


25 Fl owchart of 25% capaci t y(f or st art up)
14

. 1. 2 : 50%

. 1. 2 Part i al l oad: 50% Operat i on
25%SV0SV50SV100
, 50%

Wi t h t he same pri nci pl e as st at ed i n 25%
l oadi ng, SV0SV50SV100 are energi zed
and SV1 i s de-energi zed t o achi eve 50%
l oadi ng.

50 Fl owchart of 50% capaci t y




15


. 1. 3 100% . 1. 3 Ful l l oad: 100% operat i on

100%

Af t er t he compl et i on of st art up, al l val ves
are de-energi zed and oi l f l ows st rai ght t o
cyl i nder and pushes pi st on f orward,
dri vi ng t he sl i der t o gradual l y reduce
bypass openi ng. When t he openi ng i s
cl osed compl et el y, t he compressor i s
runni ng at 100% l oadi ng.

100 Fl owchart of 100% capaci t y cont rol

16
2. 2 25%~100% 2. 2 Li near capaci t y cont rol25%~100%

The pri nci pl e of l i near capaci t y cont rol
syst em i s same as t hree-st ep one,
except t hat t he cont rol l ogi c of sol enoi d
val ve vari es. The t hree-st ep
capaci t y-cont rol needs f our sol enoi d
val ves, whereas t he l i near one uses
t hree sol enoi d val ves t o cont rol t he
i ncrease or decrease of l oadi ng.

SV100SV0 SV1,

25%~100%

0. 1~0. 5


The syst em dynami cal l y cont rol s t he
energi ze or de-energi ze SV100, SV0
and SV1 sol enoi d val ves t o adj ust t he
compressor out put cont i nuousl y and
l i nearl y i n a range bet ween 25% and
100% l oadi ng i n response t o t he act ual
l oadi ng requi rement . The recommended
pul se t i me of sol enoi d val ves i s about
0. 1~0. 5 second and i t shal l be adj ust ed
accordi ng t o act ual operat i ng st at us.



(25%~100%)Fl owchart of l i near capaci t y cont rol (25%~100%)


17

SV1SV0
SV1
(SV100 ).

25% SV1 SV0

100%

When st art i ng compressor, SV1, SV0 are
energi zed t o bypass t he oi l i n hydraul i c
cyl i nder back t o t he l ow-pressure suct i on
end whi l e SV100 i s de-energi zed. Sl i der
remai ns i n i t s i ni t i al posi t i on due t o t he
spri ng f orce, and t hen t he compressor can
be sure t o st art at 25% l oadi ng. Once t he
st art up process i s compl et ed, SV100 i s
energi zed whi l e SV1 and SV0 are
de-energi zed t o i ncrease t he l oadi ng up t o
100%.

SV0SV1

SV100SV0 SV1

To keep compressor runni ng i n st eady
st at e, SV0SV1 are de-energi zed
cont i nuousl y t o mai nt ai n t he st abl e
ref ri gerat i on capaci t y out put . Once l oadi ng
has been changed, t he syst em energi zes or
de-energi zes of SV100SV0 and SV1 t o
adj ust out put of compressor i n order t o f i t
act ual l oadi ng requi rement .

SV1

When l oadi ng i ncreases, al l sol enoi d val ves
energi ze or de-energi ze short l y t o al l ow
smal l amount of oi l t o f l ow i nt o hydraul i c
cyl i nder and f orce sl i der t o move i n t he
di rect i on of i ncreasi ng ref ri gerat i on
capabi l i t y. I f l oadi ng decreases, al l sol enoi d
val ves energi ze or de-energi ze short l y t o
al l ow smal l amount of oi l t o f l ow out of
hydraul i c cyl i nder and cause sl i der t o move
i n t he di rect i on of decreasi ng t he
ref ri gerat i on capabi l i t y.



SV0
()
SV1
()
SV100
()

ON ON OFF

OFF OFF ON

ON ON OFF

OFF OFF OFF

S. V.
St at us
SV0
(NO)
SV1
(NC)
SV100
(NC)
St art up ON ON OFF
Loadi ng OFF OFF ON
Unl oadi ng ON ON OFF
Hol di ng OFF OFF OFF

(25%~100%)
ON, OFF
Cont rol sequence of l i near capaci t y cont rol
ON: energi ze, OFF: de-energi ze
18
I I . I I . Screw refrigerant compressor specification
1. 1. Product speci f i cat i on

Series
SRT
Model
314 321 324

s
p
e
c
i
f
i
c
a
t
i
o
n

1st
(50Hz)
displacement
m3/hr 222 320 430
2nd
(50Hz)
displacement
m3/hr 106 143 167
1st
(60Hz)
displacement
m3/hr 267 384 516
2nd
(60Hz)
displacement
m3/hr 127 172 200
speed
rpm 2950 / 3550 for 50/60 Hz

Capacity
l
%
(25 / 50 / 100) ( 25~100)
Step control (25 / 50 / 100) or linear control (25~100)

Refrigerant
- R-22 / R-404A / R-507

M
o
t
o
r


Type
-
, ,
3 phases, 2 poles, Induction motor

Voltage
- 380~415V, 50Hz / 220, 380, 440, 460V, 60Hz

Start-up
-
Y-
Y- start-up or direct-on-line start-up

Protection
Device
-

phase loss, phase sequence, and motor PTC thermistor

Dimension of
suction port
Inch
(mm)
2-5/8
66.67
4
101.60
4
101.60

Dimension of
discharge port
Inch
(mm)
1-5/8
41.27
2-5/8
66.67
2-5/8
66.67

Hydraulic test
bar
(G)
31

Weight
kg
405

570

610



19
2. 2. INSTALLATION AND COMMISSION
SPECIFICATION
2. 1 2. 1 I nst al l at i on of t he compressor
2. 1. 1 2. 1. 1 Del i very

)

Use eyebol t s at t ached t o compressor
body or t wo saf et y bel t s t o wrap around
t he compressor body and hoi st i t up. Do
not crash t he compressor body duri ng
t he t ransport i ng or hoi st i ng process
especi al l y t hose part s assembl ed on
compressor (ex. copper oi l t ube,
sol enoi d val ves, drai ni ng val ve, copper
connect ors, and t ermi nal box, et c. )
Keep t he compressor body l evel ed and
avoi d severe ground i mpact .

2. 1. 2 2. 1. 2 I nst al l at i on

(5~10mm)

I nst al l sui t abl e ant i -vi brat i on pads
(5-10mm) bet ween t he compressor
seat s t o bl ock out t he vi brat i on and
noi se generat ed by t he compressor. The
f i xed bol t must be screwed unt i l t he
upper rubber def ormed.
Keep compressor i n a wel l -vent i l at ed,
l ow humi di t y and l ow heat envi ronment
wi t h pl ent y of space f or mai nt enance
and servi ce i n f ut ure.



20
2. 1. 3 2.1.3 Release the sealed Nitrogen

(0. 5
bar)

15

Bef ore i nst al l i ng part s, open t he check
adapt or at t he suct i on end t o rel ease t he
Ni t rogen charged i nsi de t he compressor
(0. 5 bar) f i rst . The new compressor has
been f i l l ed wi t h l ubri cant i n f act ory bef ore
del i very. Si nce t he l ubri cant i s very
hygroscopi c, do not expose t he l ubri cant
t o t he at mosphere over 15 mi nut es af t er
t he compressor i s unseal ed or bef ore
i nst al l at i on.

2. 1. 4 2. 1. 4 Use of ot her l ubri cant oi l

,


I t i s necessary t o use Fu Sheng speci f i ed
oi l when repl aci ng t he compressor oi l .
Empt yi ng and cl eani ng t he i nt ernal of
compressor compl et el y i s a must bef ore
addi ng new oi l . Do not mi x di f f erent
brands of oi l . Cont act FuSheng servi ce
represent at i ve bef ore usi ng any ot her
speci al oi l .

Af t er oi l change, pl ease t urn on oi l heat er
t o heat and vacuum. I n addi t i on, because
t he hygroscopi c charact er of synt het i c oi l ,
do not expose t he oi l t o t he at mosphere
af t er t he oi l barrel i s unseal ed.

2. 1. 5 2. 1. 5 Pi pi ng
30 bar

The wel ded part s of pi pes must wi t hst and
pressure over 30 bar. Be sure t o remove
al l t he sl ag af t er wel di ng t o avoi d any
f orei gn obj ect s f rom ent eri ng compressor
and causi ng damages.


21
2. 1. 6

2. 1. 6 I mpuri t y l i mi t at i on i n syst em

30
kpa ( 4. 3 psi )

The cont ami nant s i n t he ref ri gerant
syst em af f ect t he l i f et i me and ef f i ci ency of
compressor di rect l y. I t i s cruci al t o reduce
non-condensed gas cont ent i n t he
ref ri gerant syst em. Moi st ure mi xed wi t h
ref ri gerant t ends t o bl ock t he pi pe l i ne due
t o t he f rozen wat er, causes rust t o
component s, and damages t he wi ndi ng
i nsul at i on generat es copper coat i ng on
t he rot ors. I f t he ref ri gerant pi pel i ne i s
very l ong, i t i s essent i al t o vacuum t he
syst em by connect i ng pi pes t o vacuum
machi ne f rom di f f erent part of t he chi l l er
uni t i n order t o reach t he requi red vacuum
l evel . I t i s al so i mport ant t o change t he
dryer-f i l t er and moi st ure i ndi cat or i n t he
ref ri gerant pi pel i ne regul arl y t o reduce t he
moi st ure concent rat i on wi t hi n t he pi pel i ne.
The cont ami nant s can bl ock t he suct i on
f i l t er and cause pressure drop over t he
f i l t er. When t he P of suct i on f i l t er i s
great er t han 30 kpa ( 4. 3 psi ) i t means t he
f i l t er i s cl ogged by f orei gn part i cl es and
needs t o be cl eaned ri ght away. Ri ght
af t er t he compressor i s i nst al l ed and
commi ssi oned, i t i s recommended t o
measure t he P of suct i on f i l t er t o ensure
t he cl eanness of copper t ubes i n heat
exchanger and part s i n ref ri gerant
pi pel i ne.

22
2. 2 2.2 Items to be checked before startup
2. 2. 1



(
8hr )


(
)





2. 2. 1 Compressor
Check if the refrigeration oil is filled up to
the top level of oil indicator.
Check if the oil heater is turned on to
heat up the oil before startup. It is
recommended to heat up oil for 8 hours if
the compressor has been shut down for a
long time.
Check if all manual valves (service
valves for the inlet/outlet cooling water,
brine and refrigerant pipe) have been
opened.
Check if the power cables to compressor
motor and discharge temperature switch
have been connected firmly.

2. 2. 2 2. 2. 2 El ect ri cal syst em




10M

a


b
500M DC500V

c DC2.5V





Check i f t he vol t ages and f requenci es
of mai n and cont rol power sources
are correct .
Check i f t he i nsul at i on resi st ances of
phase t o phase and phase t o ground
are hi gher t han 10M .
Warning:
aDo not measure the insulation between the
period of starting vacuum process and the
completion of refrigerant fill-up.
bAfter the refrigerant fill-up is accomplished,
the measured insulation shall be no less
than 500M measured by DC500V;
Otherwise it is necessary to verify if the
system has been vacuumed to the required
level, if moisture concentration is too high in
refrigerant or if piping is leaking and then
take corrective action to solve the problem.
cUse DC2.5V ohm meter to measure the
insulation of motor protection device (PTC
thermistor). It is not allowed to measure it by
a mega ohmmeter.
Check i f t he mot or ground wi re and
t ermi nal wi res have been connected


23



tightly.
Check if the controller settings are
correct.

2. 2. 3 2.2.3 Piping system



Check if there is any leakage from
welded piping or accessories connected
to pipelines of suction /discharge ends.

2. 2. 4 2.2.4 Notice when vacuuming system











Use largest pipe available to vacuum the
system.
Vacuum system on both suction and
discharge ends.
Elevate the surrounding temperature
while vacuuming the system in winter or
cold region.
Do not measure motor insulation during
the vacuuming process. It might
severely damage the motor winding.

2. 3 2.3 Notices in operation

5~10

Confirm the rotation direction right after

the startup. Make sure that the suction
pressure shall drop down and discharge
pressure shall rise up gradually.
Otherwise shut down the compressor
immediately, change the phase sequence
and then turn on compressor again.
If any abnormal vibration or noise is
detected during the operation, shut down
the compressor immediately and contact
Fu Sheng service representative.
The recommended overheat range of
compressor is 5~10

Any superheat beyond the range could
cause damage to compressor. The
24

5 bar

:






,

overheating might become too high while
compressor starts under heavy initial
loading. And the high superheat could
cause the motor protection device to trip
off the compressor.
Insufficient overheat could cause liquid
compression and result in the damage of
compressor. It also causes low oil level
in compressor, which leads to insufficient
lubrication to bearings.
While the compressor is running in
refrigeration system or located in a
high-humidity region, it is very possible
to find condensed water on the motor
terminals that might cause electric shock
to individual. Applying insulation resin to
the motor terminals can isolate the
condensed water and eliminate possible
short-circuit.
While running compressor in low
temperature environment, the following
actions are recommended to keep the
minimum pressure difference between
discharge and suction ends above 5 bar:
Use pressure switch to control the
start/stop state of condenser cooling fan.
Add a pressure-maintaining valve
between the compressor and condenser.


2. 4 2.4 Notices during factory test

2~4

An extra filter is recommended to be
installed on the suction end of compressor
for factory test purpose. Remove and
clean this filter, suction filter and oil filter
after the compressor has run for 2 ~ 4
hours. Clean up the pipeline and
evaporator. If welding slag or other
particles exist in system, they might be
carried back to the suction filter and block
it in consequence. Eventually, the suction


25
filter could be broken due to high pressure
drop and then the foreign particles can
enter compressor freely and damage the
motor, bearings, or slider etc.


2. 5 / 2.5 Recommended control sequence of
compressor start/stop
4




25
20~30


It is recommended to use returned brine
or hot water temperature as the basis of
controlling loading/unloading in order to
maintain stable operation.
Before each shutdown, it is necessary to
run the compressor at 25% loading for 20 ~
30 seconds in order to ensure that the slider
is brought back to its initial position for next
start.

26
3. 3. OPERATI ON SPECI FI CATI ON
3. 1 3. 1 Operat i on range
-10~55
()
:
R-22/ R-404A/ R-507: bar.
:
R-22/ R-404A/ R-507: 25bar

110

Allowable ambient temperature: -10~55
Allowable operating pressure (gauge)
The maximum suction pressure :
R-22/R-404A/R-507: 7 bar
The maximum discharge pressure:
R-22/R-404A/R507: 25bar;
The maxi mum al l owabl e di scharge
t emperat ure110


3. 2 3. 2 Operat i on l i mi t at i on
10



SV0 SV1
20~30

The st art -up/ st op cycl e: rest art t he
compressor at l east 10 mi nut es af t er
i t i s shut down.
The mot or st art -up/ st op f requency
shal l not exceed si x t i mes per hour.
The mi ni mum operat i ng t i me af t er
each st art up shal l be no l ess t han
f i ve mi nut es.
Bef ore st oppi ng compressor,
energi ze t he SV0 and SV1 sol enoi d
val ves f or 25% l oadi ng t o unl oad t he
capaci t y f or 20-30 seconds t o move
t he sl i der back t o i t s i ni t i al posi t i on
f or t he next st art up. Thi s guarant ees
t hat compressor can rest art i n t he
mi ni mum l oadi ng st at e. Af t er
compressor i s shut down, energi ze
t he oi l -heat er t o keep on heat i ng t he
ref ri gerat i on oi l and make
compressor under st andby condi t i on
f or next st art -up.

3. 3 3. 3 Power suppl y
10%

2%

2. 25%

5%

Vol t age vari at i on: 10% of rat ed
vol t age.
Frequency vari at i on: 2% of rat ed
f requency.
Vol t age unbal ance bet ween phases:
2. 25%.
Current unbal ance bet ween phases:
5%.



27
3. 4 3. 4 Saf et y devi ces i n operat i on

The saf et y devi ces are t he mi ni mum
requi rement s appl i ed t o prot ect
compressor i n operat i on.


I t em

Saf et y devi ces

Recommended set t i ng
1

Oil level switch
15~30sec

Time-relay setting: 15 ~ 30seconds.
If low-oil-level continuously exists for 15-30 sec,
compressor shall be compulsorily shut down.
Check the reason for such problem.
2
( PTC
)
Mot or wi ndi ng prot ect i on (connect ed
t o PTC t emperat ure cont rol modul e)
1305
: 1105
Tri p t emperat ure: 1305;
Reset t emperat ure: 1105.
3
( PTC )
Hi gh di scharge-t emperat ure
prot ect i on (connect ed t o PTC
t emperat ure cont rol modul e)
1105;
905
Tri p t emperat ure: 1105;
Reset t emperat ure: 905.
4
,
Phase sequence protector, phase loss
protector

Electric wiring configuration is showed at
Section 4.
5

Hi gh/ l ow pressure swi t ch
25bar.
The maxi mum di scharge pressure shal l
not exceed 25bar.
6

Over-current protection relay

The setting value can be determined from the
maximum current indicated in the performance
data under allowable operation range. Refer to
performance data manual.
7

Pressure differential protection switch at oil
filter.
: 0.5 bar.
Pressure difference setting: 0.5 bar.
8

Minimum pressure difference between
discharge and suction ends in operation.
5 bar
9

Relief valve
28bar.
.
The maxi mum pressure of rel i ef val ve
shal l not exceed 28bar.

28
Caution:
: 20 N-M
The maximum allowed torque of terminal nuts: 20 N-M
4. 4. ELECTRI C SPECI FI CATI ON
4. 1 4. 1 El ect ri c wi ri ng conf i gurat i on
Model: SRT314/321/324
Y st art up
1
3
2
4
L
3
L
1
L
2
6
5
R
2

I
N
T
6
9
F
S
Y
S
u
p
p
l
y
P
o
w
e
r
M
a
i
n
N
L
1
4
1
1
1
2



Legend:
R.S.T Main power supply
M Main contactor
S Start contactor
D Run contactor
11/14: Protection circuit
1 / 2 : Thermistor contact
L/N: Power supply 230V(115V) - 50Hz/ 60Hz
L1-L2-L3: Phase sequence / loss monitoring contact
R1: Motor thermistor
R2: Discharge temperature thermistor








!


29
INT69FSY LED LED
blink code:
blink impulse fault category blink impulse fault category
1 PTC 1 static
2 dynamic
3 time delay active(PTC<Preset)
4 short/open circuit
5 not available
2
phase
monitoring
1 phase sequence
2 phase loss
3 xxx
4 xxx
5 xxx
3 supply voltage 1 under voltage
2 xxx
3 xxx
4 xxx
5 xxx
xxx:not available







1 PTC 1 (PTC>4.5)
2
3 (PTC<Preset)
4
5 (PTC<Preset)
2 1
2
3 xxx
4 xxx
5 xxx
3 1
2 xxx
3 xxx
4 xxx
5 xxx
xxx:

L1,L2,L3123
30
(Hypal on) Recommended wi re cross-sect i on(Hypal on)

Wi re cross-sect i on
area mm
2
14 22 30 38 50 60 80 100 125 150 200 250 325

Al l owabl e current
Amp
105 140 180 210 250 290 350 410 480 520 630 720 840
:

Not e: The conduct ors do not i ncl ude t he
neut ral wi re, ground wi re or si gnal wi re.

4. 2 4. 2 St art -up sequence
Y-
40msec

100%

( 2. 5 / )

Whi l e convert i ng Y- , t he set t i ng of
magnet i c cont act or swi t chover t i me
shoul d be 40 ms or short er. I t i s
necessary t o consi der t he el ect ri cal -arc
el i mi nat i ng capabi l i t y when set t i ng up t he
swi t chover t i me. Af t er compl et i ng t he
ent i re st art i ng process, keep an eye on
t he ret urned chi l l i ng wat er t emperat ure.
Low ret urned chi l l i ng wat er t emperat ure
means t he syst em l oadi ng i s l ower t han
desi gned capaci t y. Under t hi s
ci rcumst ance, i t woul d cause f requent
st art up and short en compressor s
operat i on l i f et i me i f t he compressor i s
runni ng at f ul l l oadi ng (100%) ri ght af t er
t he st art up. (Ref er t o Sec. 2. 5:
Recommended cont rol sequence of
compressor st art / st op)




41sec
303sec
18030sec

Y SV
Y oper at i on
SV0, SV1 ener gi zed

Oper at i on
SV0 SV50/ 100
SV1 and SV50/ 100 ener gi zed
25% l oadi ng 25% l oadi ng 50 l oadi ng


31
4. 3 4.3 Notice when adopting capacitor:
0. 5

0. 95

()


Connect phase-leading capacitor at least
0.5 sec after compressor starts up.
The upper l i mi t of power f act or
compensat i on i s 0. 95.
Cut off the phase-leading capacitor at least
one second before shutting down
compressor.
Basi cal l y t he phase-l eadi ng
capaci t or i s act i vat ed onl y whi l e
compressor i s i n operat i on.

4. 4 (NFB) 4. 4 NFB sel ect i on

AF(KVA) AT
(V)

AF AT
.
Sel ect i on of NFB i s based on t he Frame
capaci t y AF and I nt errupt i ng Current
AT(A). Af t er t he AT i s deci ded, choose
t he next l arger grade f rame capaci t y
AF.
AT(A) =
(1. 5~2. 5)

AT(A) = st art i ng current mul t i pl e f act or
(1. 5-2. 5) x mot or rat ed current

,

AT

Besi des, i t i s not al l owed t o st art t wo or
more compressors concurrent l y i n a
mul t i -compressor package. To sel ect
t he AT under di f f erent st art i ng
sequence, f ol l ow t he f ormul a:
AT(A)=
+

AT( A) = st art i ng current mul t i pl e f act or x
rat ed current of t he l argest mot or + sum
of al l ot her mot ors rat ed current s
4. 5 MC 4. 5 Magnet i c cont act or (MC) sel ect i on

I
t h

I
t h
I
t h
=
1. 25/ 3
Except t he operat i on vol t age and
cont rol vol t age, t he most i mport amt
f act or i n MC sel ect i on i s t he scal e of I
t h
(current f l owi ng t hrough t he cont act i ng
poi nt ). The f ormul a i s: I
t h
= mot or s
rat ed current x 1. 25/ 3.

32
4. 6 4. 6 El ect ri cal dat a

50HzR-22/R-404A,R507 water-cooled, models (SRT314/321/324)
Series SRT
Model 314 321 324
Rated Power (kW) 45 71 92
50Hz
380V
Y Star -LRA (A) 137 224 331
Delta -LRA (A) 438 717 1023
Imax(A) 102 160 211

Maximum
capacity(A)
128 200 264
Wire
selected

22 38 60
Nominal cross section(mm)
NFB AF 225 250 400
NFB AT (A) 125 200 250
MD Magnetic contact
current(A)
102 160 211
S Magnetic contact current(A) 59 92 122
50Hz
400V
Y Star -LRA (A) 137 224 331
Delta -LRA (A) 438 717 1023
Imax(A) 97 154 206

Maximum
capacity(A)
121 193 258
Wire
selected

22 38 60
Nominal cross section(mm)
NFB AF 225 250 400
NFB AT (A) 125 200 250
MD Magnetic contact
current(A)
121 193 258
S Magnetic contact current(A) 70 111 149
50Hz
415V
Y Star -LRA (A) 137 224 331
Delta -LRA (A) 438 717 1023
Imax(A) 94 151 205

Maximum
capacity(A)
118 189 256
Wire
selected

22 38 60
Nominal cross section(mm)
NFB AF 225 250 400
NFB AT (A) 125 200 250
MD Magnetic contact
current(A)
94 151 205
S Magnetic contact current(A) 54 87 118



33
60Hz, R-22/R-404A,R507 water-cooled, models (SRT314/321/324)
Series SRT
Model 314 321 324
Rated Power (kW) 54 85 111
60Hz
220V
Y Star -LRA (A) 310 471 -
Delta -LRA (A) 990 1460 -
Imax(A) 209 334 -

Maximum
capacity(A)
261 418
-
Wire
selected

60 125-
- Nominal cross section(mm)
NFB AF 400 600 -
NFB AT (A) 250 400 -
MD Magnetic contact current(A) 209 334 -
S Magnetic contact current(A) 121 193
-
60Hz
380V
Y Star -LRA (A) 182 265 424
Delta -LRA (A) 582 840 1311
Imax(A) 121 193 258

Maximum
capacity(A)
151 241 323
Wire
selected

30 50 80
Nominal cross section(mm)
NFB AF 225 400 400
NFB AT (A) 150 250 300
MD Magnetic contact current(A) 121 193 258
S Magnetic contact current(A) 70 111 149
60Hz
440V
Y Star -LRA (A) 155 241 320
Delta -LRA (A) 495 747 1018
Imax(A) 104 167 216

Maximum
capacity(A)
130 209 270
Wire
selected

22 38 60
Nominal cross section(mm)
NFB AF 225 250 400
NFB AT (A) 150 200 250
MD Magnetic contact current(A) 104 167 216
S Magnetic contact current(A) 60 96 125
60Hz
460V
Y Star -LRA (A) 138 233 318
Delta -LRA (A) 441 722 978
Imax(A) 101 160 209

Maximum
capacity(A)
126 200 261
Wire
selected

22 38 60
Nominal cross section(mm)
NFB AF 225 250 400
NFB AT (A) 125 200 250
MD Magnetic contact current(A) 65 80 150
S Magnetic contact current(A) 35 50 80

34
5.
5.1
5 TROUBLE SHOOTING AND
MAINTENANCE PERIOD
5. 1 Trouble shooting


Malfunction status

Possible causes
,
Mot or wi ndi ng
t emperat ure-prot ect i ng swi t ch i s
act i vat ed.
1.
Hi gh compressor superheat due t o heavy
l oadi ng.
2.
Di scharge pressure i s t oo hi gh t hat causes
overl oad.
3.
Mot or wi ndi ng t emperat ure-prot ect i ng swi t ch
i s out of order.
4.
El ect ri c syst em i s f ai l ed.
5.
Def ect i ve mot or wi ndi ng t hat causes hi gh
t emperat ure ri se-up.

Modul at i on sl i der f ai l s t o move
properl y.
1.
Low t emperat ure causes hi gh oi l vi scosi t y.
2.
Ori f i ce i s cl ogged.
3.
The sol enoi d val ve i s cl ogged.
4.
The sol enoi d val ve coi l i s f ai l ed.
5.

The pi st on ri ng i s worn out .
6.
Oi l passage i s cl ogged.
7.
Oi l f i l t er i s cl ogged.
8. ()
I nsuf f i ci ent oi l (Low oi l l evel ).
9.
Syst em t emperat ure swi t ch i s f ai l ed.
Y-
Unabl e t o st art mot or or operat e
1.
The sl i der cannot ret urn back t o no-l oad
st at e t hat resul t s i n l oaded st art up.
2.
Vol t age i s t oo l ow.
3.
Vol t age i s not correct .
4.
Mot or f ai l s
5.
Phase l oss or phase sequence reverse.
6.
Mot or prot ect i on swi t ch i s act i vat ed.


35
7.
Mot or i s not connect ed correct l y.
8. ()
Di scharge servi ce val ve i s cl osed (hi gh
pressure swi t ch i s act i vat ed).

Abnormal vi brat i on or noi se
1.
Beari ng f ai l s.
2.
I nner f i xed screws become l oose.
3.
Rot or scrapes agai nst t he ot her one or
casi ng.
4.
Oi l l oss.
5.
I nner part s become l oose.
6.
El ect ri cal magnet i c noi se.
7.
Forei gn part i cl es ent er compressor.

Hi gh di scharge t emperat ure
1.
Superheat i s t oo hi gh.
2.
Di scharge pressure or l oadi ng i s t oo hi gh.
3.
Low oi l l evel .
4.
Beari ng f ai l s.
5.
Mot or i s overheat ed.
6.
Compressi on rat i o i s t oo hi gh.
7.
Uncompress red gas rat i o i n syst em i s t oo
hi gh.

Oi l l oss
1.

I nsuf f i ci ent superheat and t oo much l i qui d
ref ri gerant ret urni ng t o compressor cause
poor oi l ci rcul at i on i n syst em.
2.
Low desi gned f l ow vel oci t y causes poor oi l
ci rcul at i on.
3.

Pi pi ng i s t oo l ong or oi l i s accumul at ed at
el bows of pi pi ng syst em, whi ch causes
i nsuf f i ci ent oi l . Need t o charge more oi l .

36

5. 2 5. 2 Recommended mai nt enance peri od
Uni t : hour
Ti me

I t em
100 1000 2500 5000 10000 15000 20000 25000 30000

El ect ri cal i nsul at i on


Oi l f i l t er
/ /

Suct i on f i l t er


Lubri cant
/ / /

Oi l l evel


Vi brat i on/ noi se


Beari ng
/

Leakage

Check Repl ace.
Not e
1.
Af t er a l ong peri od of shut down, an el ect ri cal i nsul at i on check shoul d be
conduct ed bef ore st art -up.
2.

Check vibration and noise. If abnormity is found, contact Fu-Sheng to bring instrument and make
detailed check to figure out the reason.
3. ,
Conduct a pressure test on compressor after each overhaul to ensure no leakage is occurred.
4.
Al l beari ngs shal l be repl aced concurrent l y rat her t han repl aci ng part of t hem.


37
5. 3

5. 4 PUMP DOWN

PUMP DOWN

PUMP DOWN
PUMP DOWN
0. 5 bar()


6.

15%~30%

5. 3 Handl i ng a burnt out mot or
I f t he mot or i s burnt out ,
di sassembl e t he compressor, recycl e
t he pol l ut ed ref ri gerant and change
t he dry-f i l t er. Bef ore t he new
compressor i s assembl ed, vacuum
t he syst em and t hen charge wi t h
ni t rogen f i rst t o bl ock i t out of
ambi ent moi st ure. Af t er repl acement ,
run t he new compressor f or one
hour, st op i t , and repl ace new
ref ri gerat i on oi l & dry-f i l t er and make
anot her one-hour run t o conf i rm
whet her t he syst em puri t y and oi l are
wel l qual i f i ed. I f not , repeat t he
above procedure t i l l accept abl e.

5. 4 Notices on pump-down
Do not conduct pump-down
duri ng t he st andard cont rol
process unl ess i t i s real l y
essent i al t o shut down f or maki ng
i nspect i on or mai nt enance,
Keep moni t ori ng t he di scharge
t emperat ure. Once t he di scharge
t emperat ure swi t ch i s act i vat ed,
st op pump-down at once.
The mi ni mum pump-down suct i on
pressure shal l be 0. 5 bar(gauge).

6. Appl i cat i on
According to the allowed operation range of
Fu-Sheng compressor, the operation
condition under air-cooled or heat-pump
applications is more critical than water-cooled
one; the loading of the former condition is
about 15%-30% higher than the later one,
which would make discharge temperature,
motor winding temperature and oil
temperature high. To let compressor run
normally, it s essential to install liquid
injection system or oil cooler to get additional
cooling to the compressor.
6.1 Liquid injection application
38
6.1

100

( Danf oss TEAT20 Al co

seri es 935-100Sporl an Y1037)


The application is made by introducing
portion of liquid refrigerant directly into the
compression chamber or compressor
suction end for the purpose of reducing the
discharge and motor winding temperature.
When the discharge temperature is up to
100, the temperature switch sends a
signal to the solenoid valve to let the liquid
refrigerant enter compression chamber or
motor suction end through the solenoid valve
and refrigerant expansion device. The
latent heat of refrigerant provides required
cooling capacity to cool down the
temperature of compressor when running at
critical condition. Illustrated piping layout is
shown below. If a thermal expansion valve is
not specially designed for the liquid injection
application, a solenoid valve is required to
control the open/close of the expansion
valve and make the system stable. It is
recommended to use specific expansion
valves (ex. Danfoss TEAT20, Alco series
935 or Sporlan Y1037, etc.) to control the
liquid injection.



E

Connected to compressor
Copper tube

Refrigerant expansion device

T.S

Discharge temp. switch

Solenoid valve
Liquid line



39






Liquid injection
() (Middle pressure)
40
6. 2

100
50~70

6.2 Oil cool er
Under critical operation, it s essential to add
oil cooler, particularly when the discharge
temperature is over 100. The outlet oil
temperature of oil cooler is 50~70, which
varies according to the cooler capacity and
compressor operation condition. The
recommended oil cooler capacity can be
calculated from Fu Sheng selection software.

(0.5bar)
70
70




If the oil temperature is too low, install an oil
bypass valve or mixing valve (mix up cold &
hot oil). The oil cooler can be cooled down by
air, refrigerant or water. No matter what
cooling method is applied, the maximum
pressure drop through the oil cooler shall not
exceed 0.5bar. Higher pressure drop could
lead to malfunction of capacity control and
insufficient lubrication of bearings. Open the
bypass valve if the discharge temperature is
lower than 70 to bypass the oil back to
compressor. Otherwise, close it to lead the
oil into oil cooler.



- Oil cooler - water-cooled type


41




- Oil cooler - air-cooled type

42
6.3

(
)(Flash tank)
(Liquid sub-cooler)
6.3 Economizer
The principle of economizer is that of
two-stage compression. It can increase the
efficiency of compressor especially under
high compression ratio condition. The flash
tank and liquid sub-cooler system layouts are
illustrated as follows:


- Economizer - Flash tank



43

- Economizer - Liquid sub-cooler
44
6. 4 6. 4 Operat i on envel ope

R-22 Application Limits
(1.05 ,9.1)
(1.64, 11.9)
(1.32, 19.43)
(0.37, 19.43)
(0.37 ,9.1)
II
I
50%
(2.45, 9.1)
(2.45, 19.43)
10
20
30
40
50
60
-65 -60 -55 -50 -45 -40 -35 -30 -25 -20 -15
Evaporation Temp. (

)
C
o
n
d
e
n
s
i
n
g

T
e
m
p
.
(

50%

1. (X, Y) : 1. (X, Y) i ndi cat e:
X: Bar(a) X: Evaporat i ng pressure Bar(a)
Y: Bar(a) Y: Condensi ng pressure Bar(a)
2. 2. Range of appl i cat i on
I

Regi on I
Need t o operat e wi t h l i qui d i nj ect i on and oi l
cool i ng.
I I

Regi on I I
Need t o operat e wi t h l i qui d i nj ect i on or oi l
cool i ng.
100% 100% operat i on envel ope
50% 50% Part l oad operat i on envel ope


45

R-404A Application Limits
(0.38 ,11)
(0.38,23.1)
50%
(1.1, 23.1)
(1.7 ,11)
(2.08, 14.28)
II
I
(3.1, 23.1)
(3.1 ,11)
10
20
30
40
50
60
-70 -65 -60 -55 -50 -45 -40 -35 -30 -25 -20 -15
Evaporation Temp.(

)
C
o
n
d
e
n
s
i
n
g

T
e
m
p
.
(

50%

1. (X, Y) : 1. (X, Y) i ndi cat e:
X: Bar(a) X: Evaporat i ng pressure Bar(a)
Y: Bar(a) Y: Condensi ng pressure Bar(a)
2. 2. Range of appl i cat i on
I

Regi on I
Need t o operat e wi t h l i qui d i nj ect i on and
oi l cool i ng.
I I

Regi on I I
Need t o operat e wi t h l i qui d i nj ect i on or
oi l cool i ng.
100% 100% operat i on envel ope
50% 50% Part l oad operat i on envel ope
46

R-507 Application Limits
(1.39 ,11.22)
(2.13, 14.6)
(1.73, 23.61)
(0.51, 23.61)
(0.51 ,11.22)
II
I
50%
(3.14, 11.22)
(3.14, 23.61)
10
20
30
40
50
60
-65 -60 -55 -50 -45 -40 -35 -30 -25 -20 -15
Evaporation Temp. (

)
C
o
n
d
e
n
s
i
n
g

T
e
m
p
.
(

50%

1. (X, Y) : 1. (X, Y) i ndi cat e:
X: Bar(a) X: Evaporat i ng pressure Bar(a)
Y: Bar(a) Y: Condensi ng pressure Bar(a)
2. 2. Range of appl i cat i on
I

Regi on I
Need t o operat e wi t h l i qui d i nj ect i on and
oi l cool i ng.
I I

Regi on I I
Need t o operat e wi t h l i qui d i nj ect i on or
oi l cool i ng.
100% 100% operat i on envel ope
50% 50% Part l oad operat i on envel ope



47
7.
7. 1
7. 1. 1
220V
220V
110V


7. 1. 2
150W 300W110V 220V


DC500V
50M


7. 1. 3
DC200V
10M

AC230V

0. 5A, 10VA



7. 1. 4 PTC
: I NT69FSY


230V1PHASE( 115V )

AC240, 2. 5A, 360VA, SPST,

7. 1. 5 PTC
Thermi st or
: DC 2.5V

750 ohms

600VAC

7. 1. 6 PTC Thermi st or

: DC 2.5V

550 ohms

600VAC
7. PRODUCT SCOPE
7. 1 Part s speci f i cat i on
7. 1. 1 Sol enoi d val ve
The standard cont rol vol t age i s 220V.
Ot her vol t age i s avai l abl e on request .


7. 1. 2Heat er
Model: 150W or 300W, Standard voltage :
220V. Other voltage is available on
request.
I nsul at i on val ue: 50M or above
measured by DC500V Mega-ohm
met er.

7. 1. 3 Oi l l evel swi t ch
I nsul at i on val ue: 100M or above
measured by DC200V Mega-ohm
resi st ance met er.
Maxi mum al l owabl e vol t age:
AC230V
Maxi mum al l owabl e current : 0. 5A,
10VA
Dry cont act : open at l ow oi l l evel ,
cl ose at hi gh oi l l evel .

7. 1. 4 PTC cont rol modul e I NT69FSY
f or mot or and di scharge
t emperat ure
Vol t age: 230V1PHASE (115V i s
avai l abl e on request )
Rel ay: Max Amp: AC240, 2. 5A,
360VA, SPST, aut o reset .

7. 1. 5 PTC t hermi st or f or mot or
wi ndi ng prot ect i on
Maximum allowable voltage for
measuri ng resistance: DC 2.5V
Resistance under ambient temperature:
less than 750
Insulation strength: 600VAC

7.1.6 PTC Thermistor for discharge
t emperat ure protection
Maximum allowable voltage for
measuring resistance: DC 2.5V
Resistance under ambient temperature:
less than 550
Insulation strength: 600VAC
48
7. 2 Fi t t i ng l i st

No.

Parts name

Model
1

Di scharge f l ange, gasket and seal i ng pl at e

s
2

Suct i on f l ange, gasket and seal i ng pl at e

s
3

Suct i on f i l t er
s
4

Oi l f i l t er
o
5

Solenoid valves 5 pieces for step capacity control, or 4 pieces for linear
capacity control
s
6

Mot or wi ndi ng PTC t hermi st or

s
7

Ref ri gerant oi l
o
8

Oi l heat er
o
9

Oil level switch
o
10

Discharge temperature PTC t hermi st or
s
11

Drai ni ng val ve
o
12

Economi zer i nj ect i on port -compressi on chamber

s
13

Li qui d i nj ect i on adapt ers mot or si de and compressi on

chamber
s
14

Non-asbest os gasket
s
15

Di scharge check val ve
s
16

Saf et y val ve
o
17

Suct i on servi ce val ve
s
18

Di scharge servi ce val ve
s
19

Rubber mount i ng pads
o
20

Li qui d ref ri gerant i nj ect i on capi l l ary t ube or sol enoi d val ve
o
21
I NT69FSY
I NT69FSY El ect ri cal prot ect i on modul e
s
S O: :
S : St andard, O: Opt i onal , : Not appl i cabl e.


49
7. 3 7.3 Lubri cant
HCFC/R-22

Lubricant characteristics
Lubricant
FS 150R FS 300R SUNISO 4GSD
(viscosity) cst@40 ASTM
D445
168
298 54.9
(viscosity) cst@100 ASTM
D445
20.2
32 5.97
(viscosity index) ASTM
D2270
150
149 0
(Specific weight) ASTM
D1298/D1250
1.01
1.05 0.916
(Flow point)ASTM
D97
-43
-35 -35
(Flash point)ASTM
D92
290
271 188
(Voltage strength)
kVASTM D877
42.0 42.5 >30


HFC/R-407C/R-507

Lubricant characteristics
Lubricant
FS 070R FS 120R
(viscosity)cst@40 ASTM
D445
66.3 127.7
(viscosity)cst@100
ASTM D445
8.9 12.7
(viscosity index)
ASTM D2270
108 90
(Specific weight) ASTM
D4052
0.957 0.951
(Flow point)ASTM
D97
-43 -33
(Flash point)ASTM
D92
263 251
(Voltage strength)
kVASTM D877
49.4 47.0
50
7. 4 7. 4 Compressor outline dimension
Model: SRT314
Unit : mm
No. Parts Remark
(1) Solenoid valve SV0
(2) Solenoid valve SV1
(3) Solenoid valve SV2
(4) Solenoid valve SV50(50%)
(5) Solenoid valve SV100(100%)
(6) Low pressure adapter LP-1/4" Flare
(7) High pressure adapter HP-1/4" Flare
(8) Draining adapter 3/8" Flare
(9) Liquid injection adapter 3/8" Flare
(10) Economizer port ECO-3/4"
(11) Spare adaptor 3/8" Flare
(12) Middle pressure adapter MP-1/4" Flare
(13) Stop valve 2-5/8
(14) Check Valve 1-5/8
(15) Stop Valve 1-5/8"
(16) Oil inlet port 1/4
(17)
Discharge temp. PTC
Thermistor PTC Sensor
(18) Spare adaptor 1/4" Flare


51
Model: SRT321
Unit : mm
No. Parts Remark
(1) Solenoid valve SV0
(2) Solenoid valve SV1
(3) Solenoid valve SV2
(4) Solenoid valve SV50(50%)
(5) Solenoid valve SV100(100%)
(6) Low pressure adapter LP-1/4" Flare
(7) High pressure adapter HP-1/4" Flare
(8) Draining adapter 3/8" Flare
(9) Liquid injection adapter 3/8" Flare
(10) Economizer port ECO-3/4"
(11) Spare adaptor 3/8" Flare
(12) Middle pressure adapter MP-1/4" Flare
(13) Stop valve 4
(14) Check Valve 2-5/8
(15) Stop Valve 2-5/8"
(16) Oil inlet port 3/8
(17)
Discharge temp. PTC
Thermistor PTC Sensor
(18) Spare adaptor 1/4" Flare
52
Model: SRT324
Unit : mm
No. Parts Remark
(1) Solenoid valve SV0
(2) Solenoid valve SV1
(3) Solenoid valve SV2
(4) Solenoid valve SV50(50%)
(5) Solenoid valve SV100(100%)
(6) Low pressure adapter LP-1/4" Flare
(7) High pressure adapter HP-1/4" Flare
(8) Draining adapter 3/8" Flare
(9) Liquid injection adapter 3/8" Flare
(10) Economizer port ECO-3/4"
(11) Spare adaptor 3/8" Flare
(12) Middle pressure adapter MP-1/4" Flare
(13) Stop valve 4
(14) Check Valve 2-5/8
(15) Stop Valve 2-5/8"
(16) Oil inlet port 3/8
(17)
Discharge temp. PTC
Thermistor PTC Sensor
(18) Spare adaptor 1/4" Flare



53
7. 5 7. 5 Servi ce val ve di mensi on

O
O
O
O
O
O
O
O
Service valve1-5/82-5/83-1/84 Service valve5

Unit: mm
Dimension 1-5/8" 2-5/8" 3-1/8" 4"
A 70 81.5 105 130
B 42 67 80 105
C 54 65 85 111
D 47 64 79 95
E 257 317 357 440
F 90 110 140 173
G 24 28 32 50.5
H 48.5 77 88.5 114.5
I 8 8 6 6
Nominal dimension of service valve

Model Suction service valve Discharge service valve
SRT314
2-5/8" 1-5/8"
SRT321
4" 2-5/8"
SRT324
4" 2-5/8"