product

Information on oil, gas and dual fuel burners

WM 20 oil, gas and dual fuel version

Weishaupt monarch® WM20 burners • compact and powerful
Advanced technology starts from tradition
The new monarch® burner

The Monarch® Trademark has represented performance and quality in burner industry for over 50 years

For over five decades, Weishaupt monarch® series burners have

been used at various heating and industrial process applications.
Over this period of time, they have built an excellent reputation for
Weishaupt.

With the new monarch® WM burner this success story is now

continued. Ultra modern technology in conjunction with a com-
pact design allows this high performance burner to be univer-
sally utilized in various applications.
Digital. Compact. Quiet.
Digital combustion management The streamlined shape of the Thanks to the newly designed
system ensures economical and burner casing and the specially blower unit, the new Monarch
safe burner operation. The opera- designed air ducting make it burners operate with lower
tion is simple. possible to achieve high capac- sound levels.
ity with compact size.

3
Digital
Digital combustion management Flexible communication possibilities Advantages of new technology
means optimum combustion results, The integrated interface makes it possi- Digital combustion management makes
always repeatable operating points ble to receive and send all required in- burner operation user friendly and safe.
and easy handling. formation and control commands from The most important benefits are:
and to the BMS system. If required, a
Weishaupt WM 20 oil, gas and dual fuel modem can be installed so that remote • No additional burner controls are re-
burners are equipped with electronic monitoring and remote diagnostic func- quired since this function is already
fuel air ratio controller and digital com- tion can be activated. taken care by the combustion man-
bustion manager as standard. Modern ager. Fuses and eventually mains dis-
heating applications require precise and Communication with remote control connect switch are the only addi-
always repeatable correct mixture of system or with BMS system tional items required.
fuel and air. Only this way, optimum The system supports several communi-
combustion values can be guaranteed cation protocols for connecting to BMS • Less installation work means less er-
over extended periods of time. system if data has to be exchanged rors: the burners are tested as a
between burners and other heating sys- complete unit at the factory.
Simple operation tems with PLC devices.
The programming of burner function is For control and management functions, • Commissioning and service work take
performed via the Display and Control Weishaupt offers ProGraf NT - a less time. The initial presetting of the
unit. The unit is connected to the com- software product that provides a real burner is carried out at the factory. On
site, only the site specific operating
bustion manager via a BUS system. This time solution to meet all requirements.
points have to be adjusted.
way, adjustment of the burner is user
friendly.

System overview
Digital Combustion Management W-FM50 W-FM54 W-FM 100 W-FM 200
Combustion manager for intermittent operation l l l l
Combustion manager for continuous operation l2) l l
Flame sensor for intermittent operation ION/QRA2/QRB QRA2 ION/QRI/QRB ION/QRI/QRB
Flame sensor for continuous operation ION ION/QRI/QRA73 ION/QRI/QRA73
Number of actuator (max.) 2 pcs 3 pcs 4 pcs 6 pcs
Actuator with stepping motor l l l l
Compatible with Variable Speed Drive operation l l l
O2-Trim (optional) l
Single fuel operation l l l
Dual fuel operation l l l
Valve proving system for gas valves l l l l
Integrated self tuning PID-Modulating controller for
Optional l
Temperature or Pressure
Removable ABE control unit (max. distance) 65 ft (20 m) 65 ft (20 m) 325 ft (100 m) 325 ft (100 m)
Fuel meter interface l1) l1) l
Combustion efficiency display (w/ optional sensor) l
eBUS / MOD BUS interface l l l l
PC interface l l l l
1) 2)
Not in conjunction with VFD operation Only in conjunction with ionization electrode (flame rod)

4
 Burner with inbuilt digital
combustion manager

Version ZM-R Version ZM-T

Stepping motor Stepping motor

for air for air

Stepping motor Stepping motor

for oil for gas

Stepping motor
Control and
for gas
display unit Visualization via
PC / Touch Panel
Control and
display unit
Modbus

System networking via

PLC / DDC

Combustion manager Combustion manager OCI 412 W-FM COM Wireless connection
W-FM 54 W-FM 54 Communication via fixed or mobile
module phone network

Connection schematic with W-FM 54

5
Compact and Quiet
The newly developed Weishaupt Flexible control capability Applications
monarch® burner is compact, effi- WM 20 burners are available with the fol- Weishaupt WM 20 oil, gas and dual fuel
cient and quiet. It is the continuation lowing control options: burners are suitable to be used for the
of the 50 years success history of the Oil: 3-stage (T) following:
legendary monarch® series. modulating (R) • Installation on heat exchanger
Gas: Sliding two stage or • Hot water boiler
Advanced blower fan technology modulating (ZM) • Steam boiler and high pressure hot
Right from early development phase of water boiler
this new burner generation, future ori- This allows flexible control possibilities, • Intermittent and continuous operation
ented blower fan technology has been which make the burner universally • Hot air generator
utilized to achieve a compact, adaptable to various applications. Both
streamined design and low operating versions result in a smooth, trouble free The combustion air must be free from
noise. start and reliable operation. any aggressive substances (Halogen,
Chloride, Fluoride etc) and contamination
Innovative air damper control Various versions are available to (dust, building materials, vapours etc). For
The newly developed air damper control meet different emission and opera- many cases an external air ducting to
provides a high degree of linearity over tion requirements: the burner is recommended as an option.
the entire operating range.
ZM version Permissible ambient conditions:
Reduced noise level Standard version for gas and dual fuel • Ambient temperature
Right from the earliest developmental burners. -10 to +40°C (14 to 104F)
stage of this new burner generation, par- -15 to +40°C (5 to 104F)
ticular emphasis was placed on low op- LN (LowNOx) version • Air humidity: max. 80% relative
erational noise level. Low NOx version of WM gas burners. humidity, no condensation
The low NOx emission is achieved by in- • Suitable only for indoor operation
Quick commissioning, easy mainte- creased recirculation of combustion • For installation in unheated rooms un-
nance gases. der some circumstances special solu-
All WM 20 burners are shipped out with tions are required (contact Weishaupt)
an adjustable mixing head. Final adjust- 3LN multiflam® version
ment is to be performed via commission- Low NOx - Oil/ Gas/ Dual fuel burner Any discrepancy from the above de-
ing program in the combustion manager. equipped with multiflam mixing head for scribed applications requires written
the most stringent emission require- confirmation from Weishaupt Corpora-
Despite its compact design all compo- ments. The low NOx emission is tion. The maintenance interval could be
nents such as oil nozzles, mixing head, achieved by fuel distribution principle. shortened according to conditions
air damper and combustion manager are where the burners are installed.
easily accessible. Therefore mainte- Compliance to certain emission require-
nance and service work can be per- ment is also dependant on combustion Approvals
formed easily and quickly. The standard chamber geometry, volume loading and The burner is in compliance with most
hinged flange allows ideal service posi- design of the combustion system. European and North American applica-
tion for the burner. ble standards.
Suitable fuels
Matching to various combustion cham- Natural gas
ber geometries can be performed di- Propane
rectly on the burner. The flame and the Light Oil #2 according to ASTM D396
ignition process can be observed via the
integrated viewing port. Different type of fuel requires written
confirmation from Weishaupt.

6
The most important advantages at a
Burner motor Digital combustion manager
glance: and burner mounted control
• Digital combustion management with and display unit
Flame monitoring
electronic fuel air ratio controller
• Quiet operation due to air inlet
equipped with sound absorbing mate- Electronic
ignition unit
rial as standard
• High performance blower due to spe-
cially designed blower geometry and
Burner housing can Mixing assembly
air damper control system be hinged open to
• All WM-20 burners are equipped with the left or right
adjustable flame tube to match re-
quired firing rate
• Protection class IP 54 as standard
• Easy access to all components, such
as: mixing head, air damper and com-
bustion manager
• Safe operation with sliding two stage/
modulating operation as standard de-
pending on type of modulating con-
troller
• Computer aided function test of each
individual burner in factory
• Excellent price to performance ratio
• Worldwide service network

Gas butterfly
stepping motor

Oil pump
Oil regulator
stepping motor

Sound attenuated Air damper

Fan wheel air regulator stepping motor

WM-GL20 version ZM-R

7
Operating modes
Order numbers
Operating modes with oil Operating modes with gas

3 stage (T) operation 3-stage Sliding-stage or modulating (ZM)

• Oil release during start by opening the HF operation
solenoid valve 1 and safety solenoid • Burner capacity between low and
valve INT highfire depending on heat require-
• Highfire is achieved by opening sole- ment is controlled by stepping motor
noid valves 2 and 3 LF • Anywhere between both operating
• Firing rate is controlled by opening points the burner can be operated.
and closing solenoid valves 2 and 3 On Off There are no sudden changes of fuel
flow
Modulating (R) operation sliding stage • Option for combustion manager:
• By opening the solenoid valve, oil HF - W-FM 50 (single fuel application)
amount required for ignition is re- with additional modulating controller
leased - W-FM 54 (dual fuel application)
• A digital stepping motor regulates the with additional modulating controller
oil regulator up to full capacity LF - W-FM 100 (single/ dual fuel)
• Burner firing rate between low and IGN with integrated modulating controller
highfire is controlled by opening and On Off - W-FM 200 (single/ dual fuel)
closing oil regulator Alternatively an external modulating
modulating
• Integrated or external modulating con- controller can also be used for that pur-
troller can be used as firing rate con- HF pose.
troller.
HF = Highfire
INT = Intermediary fire
LF LF = Lowfire
IGN IGN = Ignition
On Off
Fuel Oil Gas
Version 3-stage sliding-stage modulating sliding-stage modulating
ZM l l

ZM-T l l l

ZM-R l l l l

Nomenclature

WM – GL 20 / 3 –A / ZM – T
ZM – R
Version
T = 3-stage
Size Capacity Revision R = sliding stage or modulating
G = Gas
L = #2 Oil
Weishaupt monarch® burner series

8
Burner selection WM-L 20
Oil burners version T and R
Burner model WM-L20/1-A/ T WM-L20/1-A/ R Burner model WM-L20/2-A/ T WM-L20/2-A/ R
Combustion head WM-L20/1, 165x40 (flat) Combustion head WM-L20/2, 165x50 (flat)
Capacity MBTU/h #2 Oil 1,365 – 4,750 Capacity MBTU/h #2 Oil 2,050 – 7,165
“WC “WC
5.0 6.0

5.0
4.0

4.0
3.0

3.0
2.0

2.0

1.0
1.0

0.0
0.0

-1.0
-1.0

-2.0 -2.0
1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000

MBTU/hr MBTU/hr

Burner model WM-L20/3-A/ T WM-L20/3-A/ R The firing rates are based on an installation altitude of
Combustion head WM-L20/3, 165x50 (flat)
Capacity MBTU/h #2 Oil 2,730 – 8,875
1,640 ft (500 m).
The capacity graphs are based on a fuel calorific value
“WC of 140,000 BTU/USG.
6.0

5.0 Voltages and frequencies:

4.0
The burners are equipped with three phase motor in 208 - 600
V, 60 Hz as standard. Different voltage and frequency are avail-
3.0
able upon request.
2.0

Standard burner motor:

1.0
Insulation class F, protection IP 54.
0.0

-1.0

-2.0
2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000

MBTU/hr

#2 Oil wih flame tube

close
open

Burner order numbers

Burner model Order No. Burner model Order No.
3 stage sliding 2 stage/ modulating
WM-L20/1-A/ T 211 210 10 WM-L20/1-A/ R 215 210 10
WM-L20/2-A/ T 211 210 20 WM-L20/2-A/ R 215 210 20
WM-L20/3-A/ T 211 210 30 WM-L20/3-A/ R 215 210 30

9
Burner selection WM-G 20
Gas burners version ZM and ZM-LN
Burner model WM-G20/2-A ZM Burner model WM-G20/3-A ZM
Combustion head WM-G(L)20/2, 190K x 65 Combustion head WM-G(L)20/3, 190K x 65
Capacity MBTU/h Natural gas 510 – 7,165 Capacity MBTU/h Natural gas 1,195 – 8,875
Propane 850 – 7,165 Propane 2,390 – 8,875

“WC “WC
6 6

5 5

4 4

3 3

2 2

1 1

0 0

-1 -1

-2 -2
0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000

MBTU/hr MBTU/hr

Burner model WM-G20/2-A ZM-LN Burner model WM-G20/3-A ZM-LN

Combustion head WM-G20/2-3a, 190x60 Combustion head WM-G20/3-3a, 190x60
Capacity MBTU/h Natural gas 850 – 5,460 Capacity MBTU/h Natural gas 1,025 – 6,820
Propane 850 – 5,460 Propane 1,025 – 6,820
“WC “WC
5 5

4 4

3 3

2 2

1 1

0 0

-1 -1

-2 -2
0 1,000 2,000 3,000 4,000 5,000 6,000 0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000

MBTU/hr MBTU/hr

Natural Gas with combustion head Propane with combustion head The firing rates are based on an installation altitude of 0
Closed Closed
Open Open
ft (0 m). A reduction of burner capacity of 1% for every
325 ft (100 m) should be taken into consideration in
case of installation altitude above 0 ft.
Burner order numbers
Burner Version Order No.
Voltages and frequencies:
model The burners are equipped with three phase motor in 208 - 600
WM-G20/2 ZM 217 211 11 V, 60 Hz as standard. Different voltage and frequency are avail-
able upon request.
WM-G20/3 ZM 217 213 11
WM-G20/2 ZM-LN 217 212 11 Standard burner motor:
WM-G20/3 ZM-LN 217 214 11 Insulation class F, protection IP 54.

10
Burner selection WM-GL 20
Dual fuel burners version ZM-T and ZM-R
Burner model WM-GL20/2-A ZM-T and ZM-R Burner model WM-GL20/3-A ZM-T and ZM-R
Combustion head WM-G(L)20/2, 190K x 45 Combustion head WM-G(L)20/3, 190K x 45
Capacity MBTU/h Natural gas 510 – 6,825 Capacity MBTU/h Natural gas 850 – 8,360
Propane 850 – 6,825 Propane 1,870 – 8,360
#2 Oil 1,365 – 6,825 #2 Oil 2,050 – 8,360
“WC “WC
5 5

4 4

3 3

2 2

1 1

0 0

-1 -1

-2 -2
0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000

MBTU/hr MBTU/hr
Natural Gas with combustion head Propane with combustion head #2 Oil with combustion head
Closed Closed Closed
Open Open Open

Burner part numbers The firing rates are based on an installation altitude of 0
ft (0 m). A reduction of burner capacity of 1% for every
Burner model Version Part number 325 ft (100 m) should be taken into consideration in
case of installation altitude above 0 ft.
WM-GL 20/2-A ZM-T 218 212 11
WM-GL 20/3-A ZM-T 218 213 11 Voltages and frequencies:
WM-GL 20/2-A ZM-R 218 215 11 The burners are equipped with three phase motor in 208 - 600
WM-GL 20/3-A ZM-R 218 216 11
V, 60 Hz as standard. Different voltage and frequency are avail-
able upon request.

Standard burner motor:

Insulation class F, protection IP 54.
Burner nomenclature

WM – GL20 / 3 –A / ZM – T
ZM – R
Version
T = 3 stage
R = sliding two stage or modulating
Revision
Capacity
Size
G = Gas
L = #2 Oil
Weishaupt monarch® series burner

11
Standard scope of supply
Description WM-L20-T WM-L20-R WM-G20 ZM/LN WM-GL20 ZM-T WM-GL20 ZM-R

Burner housing, hinge flange, housing cover,

Weishaupt burner motor, air intake housing,
fan wheel, combustion head, ignition unit, ignition
cable, ignition electrodes, combustion manager
with operating unit, flame sensor, stepping motors,
flange gasket, limit switch on hinge flange, fixing
screws l l l l l

Digital combustion manager W-FM 50 l l l – –

W-FM 54 – – – l l
W-FM 100/200    [l ZMI]  

Two gas safety shut off valves – – l l l

Gas butterfly valve – – l l l

Air pressure switch   l l l

Adjustable flame tube l l l l l

Stepping motor for electronic fuel-air ratio controller

Stepping motor for air damper l l l l l
Stepping motor for gas butterfly valve – – l l l
Stepping motor for oil regulator – l – – l

Oil pressure switch in return line – l – – l

Burner mounted oil pump l l – l l

Oil hoses l l – l l

4 oil solenoid valves, oil regulator, nozzle head with

premounted spill type nozzle – l – – l

3 oil solenoid valves, 1 safety valve, three stage

nozzle head with premounted oil nozzle l – – l –

Magnetic clutch   –  l

IP 54 protection l l l l l

l Standard
 Optional

12
Accessories
Oil burners WM-L 20 vers. T and R
Version T (3 stage) WM-L20/1-A / T WM-L20/2-A / T WM-L20/3-A / T
Combustion head extension by 4” (100 mm) 210 030 49 210 030 52 210 030 55
by 8” (200 mm) 210 030 50 210 030 53 210 030 56
by 12” (300 mm) 210 030 51 210 030 54 210 030 57
Oil hoses 50” (1300 mm) in lieu of 39” (1000 mm) 110 000 72 110 000 72 110 000 72
Ducted air intake incl. pressure switch for air duct.
(requires burner air pressure switch) 210 030 47 210 030 47 210 030 47
Burner air pressure switch 210 030 08 210 030 08 210 030 08
KS-20 modulating controller mounted on burner (W-FM50) 250 033 15 250 033 15 250 033 15
W-FM 100 (suitable for continuous operation)
in lieu of W-FM 50 fitted 210 030 32 210 030 32 210 030 32
loose 210 030 88 210 030 88 210 030 88
W-FM 200 in lieu of W-FM 50 with built-in
modulating controller, speed control module with
optional fuel metering fitted 210 030 10 210 030 10 210 030 10
loose on request on request on request
QRI flame sensor in lieu of QRB 210 030 24 210 030 24 210 030 24
Special voltage (on request only) on request on request on request

Version R (sliding multi-stage or modulating) WM-L20/1-A / R WM-L20/2-A / R WM-L20/3-A / R

Combustion head extension by 4” (100 mm) 210 030 58 210 030 61 210 030 64
by 8” (200 mm) 210 030 59 210 030 62 210 030 65
by 12” (300 mm) 210 030 60 210 030 63 210 030 66
Oil hoses 50” (1300 mm) in lieu of 39” (1000 mm) 110 001 59 110 001 59 110 001 59
Ducted air intake incl. pressure switch for air duct.
(requires burner air pressure switch) 210 030 47 210 030 47 210 030 47
Burner air pressure switch 210 030 08 210 030 08 210 030 08
KS-20 modulating controller mounted on burner (W-FM50) 250 033 15 250 033 15 250 033 15
W-FM 100 (suitable for continuous operation)
in lieu of W-FM 50 fitted 210 030 38 210 030 38 210 030 38
loose 210 030 87 210 030 87 210 030 87
W-FM 200 in lieu of W-FM 50 with built-in
modulating controller, speed control module with
optional fuel metering fitted 210 030 39 210 030 39 210 030 39
loose on request on request on request
Speed control with burner motor mounted
VFD (W-FM 50/200 required) on request on request on request
Speed control with separate VFD
(W-FM 200 required) on request on request on request
Special voltage (on request only) on request on request on request

13
Accessories
Gas burner WM-G 20 vers. ZM and ZM-LN
Accessories WM-G20/2-A ZM WM-G20/2-A ZM-LN WM-G20/3-A ZM WM-G20/3-A ZM-LN
Comb. head extension by 4” (100 mm) 230 030 79 230 030 87 230 030 79 230 030 87
by 8” (200 mm) 230 030 80 230 030 88 230 030 80 230 030 88
by 12” (300 mm) 230 030 81 230 030 89 230 030 81 230 030 89
Solenoid valve for air pressure switch
test - continuous fan or post purge 250 030 21 250 030 21 250 030 21 250 030 21
Ducted air intake incl. pressure switch for air duct.
(requires burner air pressure switch) 210 030 47 210 030 47 210 030 47 210 030 47
KS-20 modulating controller mounted on burner (W-FM50) 250 033 15 250 033 15 250 033 15 250 033 15
W-FM 100 (suitable for cont. operation) fitted 250 030 74 250 030 74 250 030 74 250 030 74
instead of W-FM 50
loose 250 031 43 250 031 43 250 031 43 250 031 43
W-FM 200 instead of W-FM 50 with built in fitted 250 030 75 250 030 75 250 030 75 250 030 75
modulating controller and VFD control
optional fuel metering
loose 250 030 48 250 030 48 250 030 48 250 030 48
Speed control with burner motor mounted
VFD (W-FM 50/200 required) 210 030 40 210 030 40 210 030 40 210 030 40
Speed control with separate VFD
(W-FM 200 required) 210 030 41 210 030 41 210 030 41 210 030 41
Special voltages on request on request on request on request

14
Accessories
Dual fuel burner WM-GL 20 vers. ZM-T and ZM-R
Accessories, version ZM-T WM-GL 20/2-A WM-GL 20/3-A
Combustion head extension by 4” (100 mm) 250 031 17 250 031 20
by 8” (200 mm) 250 031 18 250 031 21
by 12” (300 mm) 250 031 19 250 031 22
Solenoid valve for air pressure switch - continuous fan or post purge 250 030 21 250 030 21
Electromagnetic clutch 250 031 16 250 031 16
Ducted air intake incl. pressure switch for air duct. 210 030 47 210 030 47
Oil hoses 50” (1300) mm instead of 40” (1000 mm) 110 000 72 110 000 72
W-FM 100 (suitable for cont. operation) instead of W-FM 54 fitted 250 031 78 250 031 78
with built in modulating controller
loose 250 031 93 250 031 93
W-FM 200 instead of W-FM 54 with built in modulating fitted 250 031 77 250 031 77
controller and VFD control with optional fuel metering
loose 250 031 62 250 031 62
Speed control with burner motor mounted 210 030 40 210 030 40
VFD (W-FM 54/200 required)
Speed control with separate VFD on request on request
(W-FM 200 required)
Special voltages on request on request

Accessories, version ZM-R WM-GL 20/2-A WM-GL 20/3-A

Combustion head extension by 4” (100 mm) 250 031 23 250 031 26
by 8” (200 mm) 250 031 24 250 031 27
by 12” (300 mm) 250 031 25 250 031 28
Solenoid valve for air pressure switch - continuous fan or post purge 250 030 21 250 030 21
Electromagnetic clutch 250 031 29 250 031 29
Ducted air intake incl. pressure switch for air duct. 210 030 47 210 030 47
Oil hoses 50” (1300) mm instead of 40” (1000 mm) 110 000 72 110 000 72
W-FM 100 (suitable for cont. operation) instead of W-FM 54 fitted 250 031 76 250 031 76
with built in modulating controller
loose 250 031 82 250 031 82
W-FM 200 instead of W-FM 54 with built in modulating fitted 250 031 77 250 031 77
controller and VFD control with optional fuel metering
loose 250 031 63 250 031 63
Speed control with burner motor mounted 210 030 40 210 030 40
VFD (W-FM 54/200 required)
Speed control with separate VFD 210 030 41 210 030 41
(W-FM 200 required)
Special voltages on request on request

15
Technical data
Oil burners
Oil burners WM-L20/1-A / T WM-L20/2-A / T WM-L20/3-A / T
Burner motor Weishaupt model WM-D 112/140-2/3K0 WM-D 112/140-2/3K5 WM-D 112/170-2/4K5
Rated power HP (kW) 4.2 (3.2) 5.6 (4.2) 6.6 (5.0)
Full load amps (FLA) A 6.2 (@ 460V) 7.6 (@ 460V) 8.7 (@ 460V)
Motor fusing A 20 AT (external) 20 AT (external) 25 AT (external)
Speed (60 Hz) rpm 3,540 3,530 3,530
Combustion manager Model W-FM 50 W-FM 50 W-FM 50
Flame monitoring Model QRB QRB QRB
Stepping motor Air / Oil Model SQM 33 SQM 33 SQM 33
Pump fitted Model J6 J6 J7
max. flow rate GPH (l/h) 90 (350) 90 (350) 123 (474)
Oil hoses DN / Length 1/2” / 40” 1/2” / 40” 1/2” / 40”
(13 / 1000) (13 / 1000) (13 / 1000)
Weight lbs (kg) approx. 196 (88) approx. 196 (88) approx. 214 (96)

Oil burners WM-L20/1-A / R WM-L20/2-A / R WM-L20/3-A / R

Burner motor Weishaupt model WM-D 112/140-2/3K0 WM-D 112/140-2/3K5 WM-D 112/170-2/4K5
Rated power HP (kW) 4.2 (3.2) 5.6 (4.2) 6.6 (5.0)
Full load amps (FLA) A 6.2 (@ 460V) 7.6 (@ 460V) 8.7 (@ 460V)
Motor fusing A 20 AT (external) 20 AT (external) 25 AT (external)
Speed (60 Hz) rpm 3,540 3,530 3,530
Combustion manager Model W-FM 50 W-FM 50 W-FM 50
Flame monitoring Model QRB QRB QRB
Stepping motor Air / Oil Model SQM 33 SQM 33 SQM 33
Pump fitted Type TA2 TA2 TA3
max. flow rate GPH (l/h) 165 (636) 165 (636) 244 (942)
Oil hoses DN / Length 3/4” / 40” 3/4” / 40” 3/4” / 40”
(20 / 1000) (20 / 1000) (20 / 1000)
Weight lbs (kg) approx. 214 (96) approx. 214 (96) approx. 231 (104)

Voltages and frequencies:

The burners are equipped with three phase motor in 208 - 600 V, 60 Hz as standard.
Different voltage and frequency are available upon request.

Standard burner motor:

Insulation class F, protection IP 54.

16
Technical data
Gas and dual fuel burners
Gas burner version ZM and ZM-LN WM-G20/2-A ZM WM-G20/3-A ZM
Burner motor Model WM-D112/140-2/3K0 WM-D112/140-2/3K5
Rated power HP (kW) 4.2 (3.2) 5.6 (4.2)
Full load amps (FLA) A 6.2 (@ 460V) 7.6 (@ 460V)
Motor external fuse (VΔ start) A 20 A slow (external) 20 A slow (external)
Speed (60 Hz) rpm 3,540 3,530
Combustion manager Model W-FM 50 W-FM 50
Air/Gas stepping motor Model SQM 33 SQM 33
Flame monitoring Type Ionization rod Ionization rod
Weight approx. lbs (kg) 216 (97) 216 (97)

Dual fuel burner version ZM-T WM-GL 20/2-A WM-GL 20/3-A

Burner motor Model WM-D112/140-2/3K5 WM-D112/170-2/4K5
Rated power HP (kW) 5.6 (4.2) 6.6 (5.0)
Full load amps (FLA) A 7.6 (@ 460V) 8.7 (@ 460V)
Motor fuse (VΔ start) A 20 A slow (external) 20 A slow (external)
Speed (60 Hz) rpm 3,530 3,530
Combustion manager Model W-FM 54 W-FM 54
Air/Gas stepping motor Model SQM 33 SQM 33
Pump fitted Model J6 J7
max. flow rate GPH (l/h) 90 (350) 123 (474)
Oil hoses DN / Length 1/2” / 40” 1/2” / 40”
(13 / 1000) (13 / 1000)
Weight approx. lbs (kg) 238 (107) 245 (110)

Dual fuel burner version ZM-R WM-GL 20/2-A WM-GL 20/3-A

Burner motor Model WM-D112/140-2/3K5 WM-D112/170-2/4K5
Rated power HP (kW) 5.6 (4.2) 6.6 (5.0)
Full load amps (FLA) A 7.6 (@ 460V) 8.7 (@ 460V)
Motor fuse (VΔ start) A 20 A slow (external) 20 A slow (external)
Speed (60 Hz) rpm 3,530 3,530
Combustion manager Model W-FM 54 W-FM 54
Air/Gas stepping motor Model SQM 33 SQM 33
Pump fitted Model TA2 TA3
max. flow rate GPH (l/h) 165 (636) 244 (942)
Oil hoses DN / Length 1/2” / 40” 1/2” / 40”
(13 / 1000) (13 / 1000)
Weight approx. lbs (kg) 267 (120) 285 (128)

Voltages and frequencies:

The burners are equipped with three phase motor in 208 - 600 V, 60 Hz as standard.
Different voltage and frequency are available upon request.

Standard burner motor:

Insulation class F, protection IP 54.

17
Fuel systems
Gas train schematic* Oil function schematics

1 Ball valve Version ZM-T

6
1aBall valve (UL)
2 Low gas pressure switch 5 1 6
3 High gas pressure switch (CGA)
3aHigh gas pressure switch (UL) 2
P 4 Main gas valve 1 and 2 (SSOV) with
integrated gas pressure regulator
3
5 Gas butterfly valve
6 Burner
4
P P

1 2 4 3 1a 5 3a
*The above schematic shows typical gas train configuration only. The actual gas train configuration 1 Safety solenoid valve
shipped with burner might differ depending on applicable codes/ regulation and application. 2 Stage 1 solenoid valve
3 Stage 2 solenoid valve
Gas train arrangement Gas train support 4 Stage 3 solenoid valve
5 Burner mounted oil pump
For boiler with hinged door the gas The gas train must be fixed and sup- 6 Nozzle assembly with 3 atomizing nozzles
train must be installed on the opposite ported securely. They must not be al-
side of the boiler door hinge. lowed to vibrate during operation. Sup-
port suitable for the site should be
Gas train installation fitted during installation. Version ZM-R
Gas train must be mounted tension
free. Do not compensate misalignment Gas meter 6 1 2
by over tightening. Distance between For commissioning a gas meter is re-
burner and gas valves should be as quired to verify exact gas consump-
small as possible. Pay attention to the tion. 5
correct gas flow direction.

4 P M 3

8 7

1 Oil solenoid valve 1 in supply line

2 Oil solenoid valve 2 in supply line
3 Oil solenoid valve 1 in return line
4 Oil solenoid valve 2 in return line
5 Nozzle assembly with regulating nozzle
6 Burner mounted oil pump
7 Oil regulator
8 Pressure switch in return

18
Dimensions
l2
l4

b1

r1
b3
d2
d1

h4 h1 b4

h3 l5
h5

r2
h6 h2 b2
8

3
l3 l1

Burner Dimensions in inches and (mm)

model l1 l2 l3 l4 l5 b11 b2 b3 b4 h1 h2 h3 h4 h5 h6

WM-L20/1 / T 31.9 21.9 8.5 - 9.1 1.5 – 16.2 16.7 8.2 15.0 22.6 8.9 16.1 – 18.5 22.3
(810) (557) (217 - 232) (38) (411) (424) (209) (380) (573) (225) (408) (470) (567)
WM-L20/2 / T 31.9 21.9 8.9 - 9.7 1.5 – 16.2 16.7 8.2 15.0 22.6 8.9 16.1 – 18.5 22.3
(810) (557) (227 - 247) (38) (411) (424) (209) (380) (573) (225) (408) (470) (567)
WM-L20/3 / T 31.9 21.9 9.3 - 10.1 1.5 – 16.2 17.6 8.2 15.0 22.6 8.9 16.1 – 18.5 22.6
(810) (557) (237 - 257) (38) (411) (447) (209) (380) (573) (225) (408) (470) (574)

WM-L20/1 / R 31.9 21.9 8.5 - 9.1 1.5 – 16.1 16.7 8.2 15.0 22.6 8.9 16.1 – 18.5 22.6
(810) (557) (217 - 232) (38) (409) (424) (209) (380) (573) (225) (408) (470) (574)
WM-L20/2 / R 31.9 21.9 8.9 - 9.7 1.5 16.1 16.7 8.2 15.0 22.6 8.9 16.1 – 18.5 22.6
(810) (557) (227 - 247) (38) – (409) (424) (209) (380) (573) (225) (408) (470) (574)
WM-L20/3 / R 31.9 21.9 9.3 - 10.1 1.5 – 16.3 17.6 8.2 15.0 22.6 8.9 16.1 – 18.5 23.8
(810) (557) (237 - 257) (38) (414) (447) (209) (380) (573) (225) (408) (470) (604)

–
WM-G20/2 ZM 39.8 29.8 9.1 - 10.5 9.4 5.0 12.8 16.7 8.2 15.0 22.6 8.9 16.1 7.2 18.5 _
(1010) (757) (231-266) (238) (128) (326) (424) (209) (380) (573) (225) (408) (182) (470)
WM-G20/3 ZM 39.8 29.8 9.1 - 10.1 9.4 5.0 12.8 16.7 8.2 15.0 22.6 8.9 16.1 7.2 18.5 _
(1010) (757) (231-256) (238) (128) (326) (424) (209) (380) (573) (225) (408) (182) (470)

WM-G20/2 ZM-LN 39.8 29.8 9.7 - 10.5 9.4 5.0 12.8 16.7 8.2 15.0 22.6 8.9 16.1 7.2 18.5 _
(1010) (757) (247-267) (238) (128) (326) (424) (209) (380) (573) (225) (408) (182) (470)
WM-G20/3 ZM-LN 39.8 29.8 9.7 - 10.5 9.4 5.0 12.8 16.7 8.2 15.0 22.6 8.9 16.1 7.2 18.5 _
(1010) (757) (247-272) (238) (128) (326) (424) (209) (380) (573) (225) (408) (182) (470)

WM-GL20/2 ZM-T 39.8 29.8 9.1 - 10.5 9.4 5.0 16.2 16.7 8.2 15.0 22.6 8.9 16.1 7.2 18.5 22.3
(1010) (757) (231 – 266) (238) (128) (411) (424) (209) (380) (573) (225) (408) (182) (470) (567)
WM-GL20/3 ZM-T 39.8 29.8 9.1 - 10.1 9.4 5.0 16.2 17.6 8.2 15.0 22.6 8.9 16.1 7.2 18.5 22.6
(1010) (757) (231 – 256) (238) (128) (411) (447) (209) (380) (573) (225) (408) (182) (470) (574)
WM-GL20/2 ZM-R 39.8 29.8 9.1 - 10.5 9.4 5.0 21.5 2 16.7 8.2 15.0 22.6 8.9 16.1 7.2 18.5 22.6
(1010) (757) (231 – 266) (238) (128) (545) (424) (209) (380) (573) (225) (408) (182) (470) (574)
WM-GL20/3 ZM-R 39.8 29.8 9.1 - 10.1 9.4 5.0 21.5 2 17.6 8.2 15.0 22.6 8.9 16.1 7.2 18.5 23.8
(1010) (757) (231 – 256) (238) (128) (545) (447) (209) (380) (573) (225) (408) (182) (470) (604)
1
without electromagnetic clutch (pump with electromagnetic clutch add 5.1” /130 mm for version T and R)
2 3
including Magnetic clutch motor mounted VFD protrudes by approx 0.8” / 20 mm from burner motor

19
Dimensions
Ducted air intake Burner plate Preparing the heat exchanger
bottom drilling dimensions
d3
1 Flange gasket
12.8” (324)
2 Refractory
12.0” (304) 60° 3 Gap
11.0” (280)
1

3
The refractory 2 must not
9.6” (244)
8.8” (224)
7.9” (200)

protrude beyond the front edge

d4
2
of the combustion head, it can
d5 however, take a conical shape
(min. 60°).

Burner Dimensions in inches and (mm) Gas buttefly

model r1 r2 d1 d2 d3 d4 d5 d6 size

WM-L20/1 / T 33.1 34.2 7.9 13.0 M12 9.4 11.7 9.4 –

(840) (869) (200) (330) (240) (298) (240)
WM-L20/2 / T 33.1 34.2 8.7 13.0 M12 10.2 11.7 10.2 –
(840) (869) (220) (330) (260) (298) (260)
WM-L20/3 / T 33.1 34.8 9.4 13.0 M12 10.6 11.7 11.0 –
(840) (883) (240) (330) (270) (298) (280)

WM-L20/1 / R 33.1 34.2 7.9 13.0 M12 9.4 11.7 9.4 –

(840) (869) (200) (330) (240) (298) (240)
WM-L20/2 / R 33.1 34.2 8.7 13.0 M12 10.2 11.7 10.2 –
(840) (869) (220) (330) (260) (298) (260)
WM-L20/3 / R 33.1 34.8 9.4 13.0 M12 10.6 11.7 11.0 –
(840) (883) (240) (330) (270) (298) (280)

WM-G20/2 ZM 33.1 34.2 9.8 13.0 M12 10.6 11.7 11.4 DN65
(840) (869) (250) (330) (270) (298) (290)
WM-G20/3 ZM 33.1 34.2 10.2 13.0 M12 10.6 11.7 11.4 DN65
(840) (869) (260) (330) (270) (298) (290)

WM-G20/2 ZM-LN 33.1 34.2 9.8 13.0 M12 10.6 11.7 11.4 DN65
(840) (869) (250) (330) (270) (298) (290)
WM-G20/3 ZM-LN 33.1 34.2 10.2 13.0 M12 10.6 11.7 11.4 DN65
(840) (869) (260) (330) (270) (298) (290)

WM-GL20/2 ZM-T 33.1 34.2 9.8 13.0 M12 10.6 11.7 11.4 DN65
(840) (869) (250) (330) (270) (298) (290)
WM-GL20/3 ZM-T 33.1 34.8 10.2 13.0 M12 10.6 11.7 11.4 DN65
(840) (883) (260) (330) (270) (298) (290)

WM-GL20/2 ZM-R 36.4 34.2 9.8 13.0 M12 10.6 11.7 11.4 DN65
(925) (869) (250) (330) (270) (298) (290)
WM-GL20/3 ZM-R 36.4 34.8 10.2 13.0 M12 10.6 11.7 11.4 DN65
(925) (883) (260) (330) (270) (298) (290)

All dimensions are approximate.

Weishaupt reserves the right to make changes in light of future developments.

20
Fuel savings, emisions reductions:
Patented multiflam® technology

Weishaupt’s patented multiflam® The latest monarch® burners have adop- Combustion values also depend on
technology allows compliance with ted this technology and brought a com- combustion chamber geometry. volume-
very stringent emission limits with- bination of flexibility and low emissions tric loading and boiler design. Certain
out the need for expensive additio- into medium capacity range. conditions such combustion chamber
nal equipment. The emissions re- dimensions, measurement tolerances,
duction is accomplished by using Exemplary emission values temperature, humidity, etc. must be veri-
innovative mixing assembly and ap- multiflam® 3LN version burners further fied in order to guarantee emission le-
plying fuel distribution principles. reduce NOx emissions below the level vels.
which can be achieved by standard mi-
Weishaupt multiflam® burners have xing head. These additional reductions
been proven in the field for more than are accomplished by using special mi-
10 years. They are especially suited for xing assembly applying fuel distribution
applications with stringent emission li- principles.
mits.

21
Burner selection Oil burners
WM20 multiflam® burners vers. 3LN
Burner model WM-L20/2-A/ T 3LN Burner model WM-L20/3-A/ T 3LN
Combustion head WM-L20/2-3LN, Ø 160 / Ø 22 Combustion head WM-L20/3-3LN, Ø 160 / Ø 22
Capacity MBTU/h #2 Oil 1,365 – 4,950 Capacity MBTU/h #2 Oil 1,540 – 6,825
“WC “WC
5.0 6.0

4.0 5.0

4.0
3.0

3.0
2.0

2.0
1.0
1.0

0.0
0.0

-1.0
-1.0

-2.0 -2.0
1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000

MBTU/hr MBTU/hr

#2 Oil wih flame tube

close
open

Burner order numbers The firing rates are based on an installation altitude of
1,640 ft (500 m).
Burner model Order No.
The capacity graphs are based on a fuel calorific value
WM-L20/2-A/ T-3LN 211 210 24 of 140,000 BTU/USG.
WM-L20/3-A/ T-3LN 211 210 34
Voltages and frequencies:
The burners are equipped with three phase motor in 208 - 600
V, 60 Hz as standard. Different voltage and frequency are avail-
able upon request.

Standard burner motor:

Insulation class F, protection IP 54.

22
Burner selection Gas and Dual fuel burners
WM20 multiflam® burners vers. 3LN
Burner model WM-G20/2-A/ ZM-3LN Burner model WM-G20/3-A/ ZM-3LN
WM-GL20/2-A/ZM-T-3LN WM-GL20/3-A/ZM-T-3LN
Combustion head WM20/2-3LN, Ø 160 / Ø 22 Combustion head WM20/3-3LN, Ø 160 / Ø 22
Capacity MBTU/h Natural gas 685 – 4,945 Capacity MBTU/h Natural gas 1,195 – 6,825
Propane 855 – 4,945 Propane 1,365 – 6,825
#2 Oil 1,365 – 4,945 #2 Oil 1,540 – 6,825
“WC “WC
5 5

4 4

3 3

2 2

1 1

0 0

-1 -1

-2 -2
0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000

MBTU/hr MBTU/hr
Natural Gas with combustion head Propane with combustion head #2 Oil with combustion head
Closed Closed Closed
Open Open Open

Burner part numbers The firing rates are based on an installation altitude of 0
ft (0 m). A reduction of burner capacity of 1% for every
Burner model Version Part number 325 ft (100 m) should be taken into consideration in
case of installation altitude above 0 ft.
WM-G 20/2-A ZM-3LN 217 215 11
WM-G 20/3-A ZM-3LN 217 216 11 Voltages and frequencies:
WM-GL 20/2-A ZM-T-3LN 218 214 11 The burners are equipped with three phase motor in 208 - 600
WM-GL 20/3-A ZM-T-3LN 218 217 11
V, 60 Hz as standard. Different voltage and frequency are avail-
able upon request.

Standard burner motor:

Insulation class F, protection IP 54.

23
Standard scope of supply
Description WM-L20 T-3LN WM-G20 ZM-3LN WM-GL20 ZM-T-3LN

Burner housing, hinge flange, housing cover,

Weishaupt burner motor, air intake housing,
fan wheel, combustion head, ignition unit, ignition
cable, ignition electrodes, combustion manager
with operating unit, flame sensor, stepping motors,
flange gasket, limit switch on hinge flange, fixing
screws l l l

Digital combustion manager W-FM 50 l l –

W-FM 54 – – l
W-FM 100/200   

Two gas safety shut off valves – l l

Gas butterfly valve – l l

Air pressure switch  l l

Adjustable flame tube l l l

Stepping motor for electronic fuel-air ratio controller

Stepping motor for air damper l l l
Stepping motor for gas butterfly valve – l l
Stepping motor for oil regulator – – –

Burner mounted oil pump l – l

Oil hoses l – l

3 oil solenoid valves, 1 safety valve, three stage

nozzle head with premounted oil nozzle l – l

Magnetic clutch  – 

IP 54 protection l l l

l Standard
 Optional

24
Accessories
WM 20 multiflam® burners vers. 3LN
Oil burner WM-L20/.. -A T-3LN WM-L20/2-A / T WM-L20/3-A / T
Combustion head extension by 4” (100 mm) 210 031 36 210 031 36
by 8” (200 mm) 210 031 37 210 031 37
by 12” (300 mm) 210 031 38 210 031 38
Oil hoses 50” (1300 mm) in lieu of 39” (1000 mm) 110 000 72 110 000 72
Ducted air intake incl. pressure switch for air duct.
(requires burner air pressure switch) 210 030 47 210 030 47
W-FM 100 (suitable for continuous operation)
in lieu of W-FM 50 fitted 210 030 32 210 030 32
loose 210 030 88 210 030 88
W-FM 200 in lieu of W-FM 50 with built-in
modulating controller, speed control module with
optional fuel metering fitted 210 030 10 210 030 10
loose on request on request
KS20 modulating controller installed on burner (W-FM50) 250 033 15 250 033 15
QRA73 flame sensor (W-FM100/200) 210 031 63 210 031 63
Special voltage (on request only) on request on request

Gas- and Dual fuel burner WM-G(L)20/.. -A ZM-3LN G20/2 G20/3 GL20/2 GL20/3
Combustion head extension by 4” (100 mm) 250 032 77 250 032 77 250 032 80 250 032 80
by 8” (200 mm) 250 032 78 250 032 78 250 032 81 250 032 81
by 12” (300 mm) 250 032 79 250 032 79 250 032 82 250 032 82
Oil hoses 50” (1300 mm) in lieu of 39” (1000 mm) – – 110 000 72 110 000 72
Ducted air intake incl. pressure switch for air duct. 210 030 47 210 030 47 210 030 47 210 030 47
W-FM 100 (suitable for continuous operation)
in lieu of W-FM 50 fitted 250 030 74 250 030 74 – –
loose 250 031 43 250 031 43 – –
W-FM 200 in lieu of W-FM 50 with built-in
modulating controller, speed control module with
optional fuel metering fitted 250 030 75 250 030 75 – –
loose 250 030 48 250 030 48 – –
Speed control with burner motor mounted
VFD (W-FM 50/200 required) on request on request on request on request
Speed control with separate VFD
(W-FM 200 required) on request on request on request on request
KS20 modulating controller installed on burner (W-FM50) 250 033 15 250 033 15 – –
Electro magnetic clutch – – 250 031 16 250 031 16
QRA73 flame sensor (W-FM100/200) 210 031 63 210 031 63 210 031 63 210 031 63
Special voltage (on request only) on request on request on request on request

25
Technical data
WM 20 multiflam® burners vers. 3LN
Oil burners WM-L20/2-A T-3LN WM-L20/3-A T-3LN
Burner motor Model WM-D112/140-2/3K0 WM-D112/170-2/4K5
Rated power HP (kW) 4.3 (3.2) 6.6 (5.0)
Full load amps (FLA) A 6.2 (@ 460V) 8.7 (@ 460V)
Motor external fuse (VΔ start) A 20 A slow (external) 20 A slow (external)
Speed (60 Hz) rpm 3,540 3,530
Combustion manager Model W-FM 50 W-FM 50
Flame monitoring Type QRA2 QRA2
Air/Gas stepping motor Model SQM 33 SQM 33
Pump fitted Model J6 J7
max. flow rate GPH (l/h) 90 (350) 123 (474)
Oil hoses DN / Length 1/2” / 40” 1/2” / 40”
(13 / 1000) (13 / 1000)
Weight approx. lbs (kg) 235 (107) 253 (115)

Gas burners WM-G20/2-A ZM-3LN WM-G20/3-A ZM-3LN

Burner motor Model WM-D112/140-2/3K0 WM-D112/170-2/4K5
Rated power HP (kW) 4.3 (3.2) 6.6 (5.0)
Full load amps (FLA) A 6.2 (@ 460V) 8.7 (@ 460V)
Motor fuse (VΔ start) A 20 A slow (external) 20 A slow (external)
Speed (60 Hz) rpm 3,540 3,530
Combustion manager Model W-FM 50 W-FM 50
Flame monitoring Type QRA2 QRA2
Air/Gas stepping motor Model SQM 33 SQM 33
Weight approx. lbs (kg) 225 (102) 243 (110)

Dual fuel burners WM-GL 20/2-A WM-GL 20/3-A

Burner motor Model WM-D112/140-2/3K5 WM-D112/170-2/4K5
Rated power HP (kW) 5.6 (4.2) 6.6 (5.0)
Full load amps (FLA) A 7.6 (@ 460V) 8.7 (@ 460V)
Motor fuse (VΔ start) A 20 A slow (external) 20 A slow (external)
Speed (60 Hz) rpm 3,530 3,530
Combustion manager Model W-FM 54 W-FM 54
Air/Gas stepping motor Model SQM 33 SQM 33
Pump fitted Model TA2 TA3
max. flow rate GPH (l/h) 165 (636) 244 (942)
Oil hoses DN / Length 1/2” / 40” 1/2” / 40”
(13 / 1000) (13 / 1000)
Weight approx. lbs (kg) 247 (112) 264 (120)

Voltages and frequencies:

The burners are equipped with three phase motor in 208 - 600 V, 60 Hz as standard.
Different voltage and frequency are available upon request.

Standard burner motor:

Insulation class F, protection IP 54.

26
Dimensions
multiflam® oil burner version 3LN

r
d

r
h 0.3” b
(8 mm)
h h

l
l l 2

optional Burner mounted pump motor unit Motor mounted VFD

Burner Dimensions in inches and (mm)

model l1 l2 l3 b1 b2 h1 h2 h3 h6 r1 r2 d1

WM-L20/2-A T-3LN 39.8 10.0 11.6 – 12.2 16.2 16.7 22.6 8.9 16.1 22.3 33.1 34.2 9.5
(1010) (254) (295 – 310) (411) (424) (573) (225) (408) (567) (840) (869) (242)

WM-L20/3-A T-3LN 39.8 10.0 11.6 – 12.2 16.2 17.6 22.6 8.9 16.1 22.6 33.1 34.8 9.5
(1010) (254) (295 – 320) (411) (447) (573) (225) (408) (574) (840) (883) (242)
1
without electro magnetic clutch (Oil pump with magnetic clutch add. 5.1”/130 mm)
2
motor mounted VFD protruding section approx. 0.8”/20 mm

multiflam® gas burner version 3LN

0.3”
(8 mm)

Burner Dimensions in inches and (mm)

model l1 l2 l3 l4 b1 b2 h1 h2 h3 h4 r1 r2 d1 d6

WM-G20/2-A ZM-3LN 39.8 10 11.6 – 12.2 5.0 12.8 16.7 22.6 8.9 16.1 7.2 33.1 34.2 9.5
(1010) (254) (295 – 310) (128) (326) (424) (573) (225) (408) (182) (840) (869) (242) DN65

WM-G20/3-A ZM-3LN 39.8 10 11.6 – 12.6 5.0 12.8 17.6 22.6 8.9 16.1 7.2 33.1 34.8 9.5
(1010) (254) (295 – 320) (128) (326) (447) (573) (225) (408) (182) (840) (883) (242) DN65
All dimensions are approximate. Weishaupt reserves the right to make changes in light of future developments.

27
Dimensions
multiflam® dual fuel burner version 3LN

r
d
h
h

r
h 0.3” b
d
(8 mm)
h l h

l
l l 2

Burner mounted pump motor unit Motor mounted VFD

optional

Burner Dimensions in inches and (mm)

model l1 l2 l31) l4 b1 b2 h1 h2 h3 h4 h6 r1 r2 d1 d6

WM-GL20/2-A ZM-T-3LN 39.8 10.0 11.6 – 12.2 5.0 16.2 16.7 22.6 8.9 16.1 7.2 22.3 33.1 34.2 9.5
(1010) (254) (295 – 310) (128) (411) (424) (573) (225) (408) (182) (567) (840) (869) (242) DN65

WM-GL20/3-A ZM-T-3LN 39.8 10.0 11.6 – 12.8 5.0 16.2 17.6 22.6 8.9 16.1 7.2 22.6 33.1 34.8 9.5
(1010) (254) (295 – 325) (128) (411) (447) (573) (225) (408) (182) (574) (840) (883) (242) DN65
1
without electro magnetic clutch (Oil pump with magnetic clutch add. 5.1”/130 mm)
2
motor mounted VFD protruding section approx. 0.8”/20 mm

All dimensions are approximate. Weishaupt reserves the right to make changes in light of future developments.

Burner plate drilling dimensions Preparing the heat exchanger

d3
1 Flange gasket
2 Refractory
45° 60° 3 Gap
(242 mm)

(290 mm)
11.4”
9.5”

Burner head has to protrude by

approx 2” (50mm) from refrac-
d4 tory 2, refractory may however,
take a conical shape (min. 60°).
d5

d3 = M12
d4 = 10.6” (270 mm)
d5 = 11.7” (298 mm)

28
That is not a Facade. Weishaupt has been one of the leading
company in heating and combustion industry since years
with headquarter in Schwendi and branches all over the
world. That is Reliability.
Weishaupt is Trustworthy, quality,
Reliability. good customer service,
The family business in innovation and experi-
Schwendi was estab- ence are values on
lished by Max which the Pioneer Max
Weishaupt in 1932. Weishaupt established
Represented in 55 his company. All this
countries by branch of- combined in a word is
fices and subsidiaries reliability.
Weishaupt is interna-
tional leader in the areas Therefore stands
of combustion technol- Weishaupt today.
ogy and heating applica-
tions.

29
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That is not an Imagination. Continuous research
and development at Weishaupt guarantee clean
and efficient burners.
That is Reliability.

Test facility at Weishaupt R&D centre

30
Developing improvement.
Weishaupt recognizes the signs of time
and researches perpetually to get more
efficient and environmental friendly
burner systems.

This way not only Weishaupt prevents

largely unnecessary energy cost but
also actively contributes in conserving
the environment.

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 Weishaupt Corporation
6280 Danville Road
Mississauga, ON L5T 2H7
Ph: (905) 564 0946
Fax: (905) 564 0949
www.weishaupt-corp.com

Weishaupt America Inc.

2587 Millennium Drive, Unit A
Elgin, IL, 60124
Ph: (847) 531 5800
Fax: (847) 531 5855
www.weishaupt-america.com

Weishaupt America Inc.

1320 Ellsworth Industrial Blvd.
Atlanta, GA 30318, USA
Ph: (404) 968 2935
Fax: (404) 968 2966
www.weishaupt-america.com

Print No. 83211516, September 2016

Printed in Germany. All rights reserved.

Regular maintenance reduces heating costs and environmental enormous trust placed in Weishaupt’s burners, for at Weishaupt,
pollution. Only a properly adjusted burner can save energy and product and customer service belong together.
be environmentally friendly. Behind each Weishaupt burner Weishaupt customer service is there for you all year round.
stands the whole Weishaupt customer service organization. The Whenever you need help, be it the supply of spare parts,
outstanding efforts made in maintenance and service justify the technical advice or a site visit. We are there when you need us.