SIT Group
610 AC3
M U LT I F U N C T I O N A L G A S C O N T R O L
CONTROL KNOB (OFF, PILOT, ON)
TEMPERATURE SELECTION KNOB
ON-OFF REGULATING THERMOSTAT
THERMOELECTRIC SAFETY DEVICE
PIN 0085AO0252
THERMOSTATIC MULTIFUNCTIONAL
CONTROL
Multifunctional safety control
with thermoelectric flame
failure device, pressure
adjuster with override device
and on-off thermostat.
No external electric power
supply required.
610 AC3 is specifically
designed for use
with gas water storage heaters.
MAIN FEATURES
Three-position control knob: off, pilot, on.
Temperature selection knob.
Thermoelectric flame failure device.
Pressure adjuster with override device.
On-off type thermostat.
Resettable safety thermostat.
Pilot outlet with gas flow preselection screw.
Inlet and pilot filters.
Inlet and outlet pressure test points.
Data refer to EN 126
DESCRIPTION
Control knob (off, pilot, on)
Temperature selection knob
Water connection
Adjustment and safety thermostat bulbs
Outlet pressure adjustment screw
(P.R. ADJ.)
Pressure adjuster override screw
(NO P.R.)
Adjustment screw for gas flow to the
pilot
Inlet pressure test point
Outlet pressure test point
Pilot outlet
Thermocouple connection
Gas inlet
Gas outlet
8
9
10
11
12
13
11
4
5
13
10
12
8
9
TECHNICAL DATA
Gas connections:
Water connections:
Installation position:
Gas families:
Maximum gas inlet pressure:
Outlet pressure range:
Working temperature range:
Pressure regulator:
Rp 1/2 ISO 7 (0.75-18 UNS 2B on request)
Rc 3/4 ISO 7 (3/4 NPT on request)
any position
I,II and III
50 mbar
3-18 mbar
0-80 C
Class C
THERMOSTAT
Termostat range
Differential (a)
30-70C
35-75C
40-80C
< 14C
< 14C
< 14C
On request: differential (a) < 11C
Gas flow rate
1
2
3
4
5
SAFETY THERMOSTAT
Temperature
Set-point
92C
Data refer to EN 126
Differential (a)
<30C
36
DIMENSIONS
211
89
33.5
45.5
16
22
27.5
112
9.5
6,5
82
Rp1/2
3/4 NPT
Rp 3/4
89.5
46
10
26
A
M10x1
7/16-24 NS
16
2.5
42
30
T.C. M9x1
0.750-18UNS
Rp 1/2
FLOW RATE AS FUNCTION OF PRESSURE DROP
3
Q
d=0.6]
Q [m
[m3/h
/h d=0.6]
7
6
5
Standard
I Family (d = 0.45)
Q = 4.3 m3/h
p = 5 mbar
II Family (d = 0.6)
Q = 3.7 m3/h
p = 5 mbar
III Family (d = 1.7)
Q = 4.6 kg/h
p = 5 mbar
2
1
0
2 4 6 8 10 12 14 16 18
p [mbar]
p [mbar]
OPERATION
Ignition
Depress and turn the control knob to the pilot position
fig. 1
Depress the button and ignite the pilot flame while
keeping the knob fully depressed for a few seconds
(fig. 1).
Release the knob and check that the pilot flame stays
lit. If it goes out, repeat the ignition operation.
fig. 2
Main burner ignition
Depress and turn the control knob to the position
corresponding to symbol
returns to the ON position
. On release, the knob
. Turn the temperature
selection knob to the point corresponding to the
desired temperature (fig. 3).
fig. 3
Pilot position
To close the main burner and keep the pilot flame on,
depress and turn the control knob to the pilot position
(fig. 1).
Shutdown
Turn the control knob to the OFF position
(fig. 4).
fig. 4
CAUTION: after shutting down, wait at least two
minutes before re-igniting so as to allow the flame
failure device to return to the safety position.
INSTALLATION
Main gas connection
The connection is made using gas pipes with Rp 1/2 ISO 7 threading (the valve is available
with 0.75-18 UNS 2B outlet on request). Torque: 25 Nm.
Water connection
The connection flange threading is Rc 3/4 ISO 7 (3/4 NPT on request).
Connection to the pilot burner
Pipes with a 4 mm, 6 mm or 1/4 diameter can be used. Use a nut and olive of appropriate
dimensions. Tighten to 7 Nm torque.
Thermocouple connection
Connect the thermocouple to the magnet unit, checking that the fixing connection is
properly dimensioned. Torque: 3 Nm.
After making the gas connections, check tightness and that the appliance is operating
properly.
SETTINGS AND ADJUSTMENTS
Adjusting the outlet pressure
This adjustment must be made with the
thermostat bulb cold and the knob in
position 5.
Take off the temperature adjustment
knob (A). Check that the pressure adjustment override screw (NO P.R.) is screwed
out completely. Screw in the screw (P.R.
ADJ.) to increase the outlet pressure or
screw it out to reduce it.
Overriding the pressure adjuster
Screw the screw (NO P.R.) fully in.
Adjusting the gas flow rate to the pilot
Screw in the screw (PILOT ADJ.) to reduce
the flow, or screw it out to increase it. To
put the pilot gas flow adjuster out of service, fully screw in the screw (PILOT ADJ.)
and then screw it back two complete
turns.
Taking off temperature adjustment knob
IMPORTANT
At the end of all setting and adjustment
operations, check gas tightness and that
the appliance is operating properly.
P.R. ADJ.
NO P.R.
PILOT ADJ.
Adjusting the outlet pressure and the flow
rate to the pilot
Implement the provisions in the Use and Maintenance manual
- code 9.956.610 - for installation, adjustment and use
610 AC3
Multifunctional control
with on-off thermostat
and temperature control
knob, for gas water
Cod. 9.955.741 - R00
GRAPHIC DESIGN BY START - PD - ITALY
storage heaters.
SIT La Precisa
Viale dell'Industria 31/33 35129 PADOVA - ITALY
Tel. 049/8293111 - Fax 049/8070093 - Telex 430130 SITEC I
