Sit 630 Eurosit Technical manual

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630
EUROSIT
Read the instructions before use. This control must be installed in accordance with the rules in force.

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English
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APPLICATION
The 630 Eurosit is a combination gas control with a
snap-action modulating thermostat, safety interlock and
additional onloff function. The 630 Eurosit does not require
electrical supply and is available in a wide range of
configurations. It is particularly suitable for use in gas
space heaters, gas fireplaces, gas log sets, and all
appliances that require accurate temperature control.
These controls are configured for both LPG and NG
applications.
SPECIFICATIONS
TECHNICAL DATA
Gas connections
3/8" 9/16" UNEF
Pilot connections 7/16" UNEF
Installation position Multi-position
~--------------------~-------------------------
Gas families Petroleum Gas or Natural Gas
Maximum 1/2 PSI
Maximum outlet pressure setting range 3.5" -6" w.c. for NG and 8"-12" w.c. for LPG
Working temperature range
32 - 175°F
Pressure regulator (some models) Preset
MAIN FEATURES
Control knob: "OFF/PILOT", and Temperature selection (MS)
Thermo-electric name failure device with re-start interlock (GM)
Maximum gas How adjustment (RQ) or, alternatively,
Pressure Regulator (PR)
Modulating thermostat with additional onloff function (TH)
Pilot outlet with How adjusting screw (RQP)
Inlet and pilot filters (FL)
Side or bottom main gas inlet and outlet
Threaded 3/8" NPT or 9/16" lINEF gas inlet and outlet connections
WORKING DIAGRAM
Versions without pressure regulator
MAIN
BURNER
PILOT
BURNER
FL RQ

Versions with pressure regulator
TH
~
MAJN
----:::eu;"='RN"-::'S=R
FL MS GM '0.... t-_....:R~IL~OT~
BURNER
FL RQ
VALVE DESCRIPTION
1. Temperature sensing bulb
2. Maximum flow screw
2'. Pressure regulator
3. Minimum rate screw
4. Control knob
5. Pilot fiow adjustment screw
6. Inlet pressure test port
7. Outlet pressure test port
8. Pilot outlet
9. Thermocouple connection
10. Side inlet
11. Side outlet
12. Bottom inlet
13. Bottom outlet

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THERMOSTAT REGULATION SPECIFICATIONS
Thermostat Features
Thermostatic Range
55.100 of
55.118 of
a
2.7
4.5
i b c
I
2.7 1.B
4.5
2.7
b
Temperature
c a
eSTOP:
Do not install, replace, or in any way modify the gas valve or the appliance, unless
CERTIFIED and QUALIFIED as a Gas Appliance Service Technician on the appliance this
valve is used on. READ AND FOLLOW ALL INSTRUCTIONS,
INSTALLATION
Valve configuration inspection
Min Rate Screw
The 630 Eurosit can have one inlet and one outlet plugged.
Inspect the control to determine which inlet and outlet are
plugged. The plugs use o·ring seals and are made of brass,
The replacement control must have the same inlet and outlet
plugged as the original control. Use a 5/16" Allen key to
remove and tigten the plug.
The replacement 630 Eurosit has an On/Off modulating plug
(fig, A) installed. To achieve similar performance as the
original control. remove the plug in the replacement control
using a Flathead Screwdriver and set aside. Remove the Min
Rate Screw (fig. B) from the original control and install it into the replacement control in the same
location.
When installation of this product begins."
1. Read all of these instructions carefully. Failure to follow instructionscould damage the product
or cause a dangerous condition.
2. Check the ratings given in the instructions and on the appliance to make certain that the control
is suitable for your application,
3. All operations of installation, calibration, conversion and regulation must be undertaken
exclusively by qualified personnel following the instruction speCified in this catalog and those in
the instruction manual of the appliance in which the valve is installed.
4, After installation is complete, verify that the appliance operates as indicated in these
instructions.
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WARNING:
Fire or Explosion Hazard.
Can cause property damage, severe iruury or death.
Follow these instructions completely.
1. Turn off gas supply at the appliance service valve before installation, and perform a Gas
Leak Test after the installation is completed.
2. Always install the sediment trap in the gas supply line to prevent contamination of the gas
control.
3. Do not force the control knob. Use only your hand to turn the knob. If the knob does not
move by hand, the valve should be replaced by a trained service technician.
WARNING:
Oxygen Depletion Hazard.
Can cause injury or death by asphyxiation.
00 not use valves for vented appliances on unvented or vent free appliances. 00 not use
valves for unvented or vent free appliances on vented appliances.
&. CAU'nON
Electrical shock or equipment damage hazard.
Can shock individuals or short equipment circuitry.
Make sure to disconnect all electrical supplies before beginning the installation process.
IMPORTANT
- These gas controls are shipped with anti-contamination seals over inlets and outlets.
- Do not remove the seals until ready for connection to piping.
- Appliance manufacturer's instructions supercede any instructions listed in this instruction book.
INSTALL PIPING TO GAS VALVE
All piping must comply with local codes and ordinances or with the National Fuel Gas code (ANSI
Z223.1 NFPA No. 54) whichever applies. Tubing installation must comply with approved standards
and practices. Use appropriately sized fittings when connecting aluminum tubing to the pilot outlet.
1. Use new, clean and correctly reamed pipe free
from burrs,chips, debris and any foreign matter.
When tUbing is used, make sure the ends are
square and clean. All tubing bends must be smooth
and without deformation.
2. Run pipe or tubing to the valve. If tubing is used,
obtain a tube-to-pipe coupling to connect the
tubing to the valve.
3. Install sediment trap (Drip Leg) in the supply line to
the gas valve
~ GAS SUPPLY
INLET
• TOCONTROL
T
3" MIN.
DRIP LEG (DOWN)
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INSTALLING THE VALVE
1. Mount the valve in the desired position.
2. Mount the valve so the flow of gas is consistent with the gas
flow arrows on the valve.
3. Apply a moderate amount of quality pipe compound
(DO NO TUSE TEFLON TAPE) to the pipe only, leaving two
end threads bare. On LP installations, use compound that
resists exposure to LP gas.
4. Remove seals over inlet and outlet if necessary
5. Connect pipe to valve inlet and outlet. Place wrench as
in (fig. A).
6. Thread pipe into the valve until a gas tight seal is
achieved. Typically. for NPT thread, penetration is usually no more than the diameter of the
pipe or 2 and 1/4 turns of thread. Valve distortion or mechanical failure can result if the pipe is
inserted too deeply.
7. Connect pilot tUbing to valve with appropriately sized fittings.
8. Confirm gas tight seals with gas leak test.
g. Connect thermocouple to safety magnet. Hand tighten, and then rotate 1/4 turn with wrench.
WIRING
Follow the wiring instructions furnished by the appliance manufacturer, if available, or use the
following general instructions. Appliance manufacturers instructions always supercede these
instructions.
All wiring must comply with applicable electrical codes and ordinances.
Disconnect the appliance power source before making any electrical connections to prevent the
possibility of electrical shock or damage to equipment.
1. Check the millivolt rating on the gas valve and make sure it matches the available supply. Install
thermostat and other accessories as required.
2. For the Millivolt Plus, connect thermocouple to convenient upper or lower connection port. Hand
tighten, and then rotate _ turn with wrench.
3. Connect the Thermo-generator leads to TPTH and TP terminals on main operator coil.
4. This valve may only be used in self-generating systems. Use only components specifically
designed for use in a millivolt system.

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OPERATION
Pilot flame ignition
Start from the "OFF" position. Rotate the control
knob to the "PILOT" position. Press the knob
and light the pilot name. keeping the knob fully
depressed for thirty (30) seconds or more, until a
strong pilot flame is present. Release the knob
and verify that the pilot flame remains lit.
Igniting the main burner
Turn the control knob to the desired temperature
setting. In the modulating version. the gas path
to the main burner opens when the ambient
temperature is lower than the set point
temperature. In the manual version, the gas
path to the main burner opens immediately when
the knob is rotated to a temperature setting.
Stand-by position
To maintain a flame at the pilot burner with the
main burner off. turn the control knob to the
"PILOT" position.
Turning off
Turn the control knob to the "OFF" position.
& CAUTION
After shutting down, wait at least five minutes before re-igniting. This will allow the safety
interlock to reset.
FINAL CHECKS
WARNING:
Fire or Explosion hazard.
Can cause damage to property and severe injury or death.
Do not force the control knob. Use only your hand to turn the knob. If the knob does not move
by hand, the valve should be replaced by a trained service technician.

PERFORM GAS LEAK TEST
WARNING:
Stand away from the main burner while lighting.
Hidden gas leaks can cause Hashbacks in the appliance area. Check for gas leaks with rich
soap and water solution any time work is done on a gas system.
GAS LEAK TEST
o Using a solution of soapy water, paint the piping connections which are upstream of the control.
The presence of bubbles indicate a gas leak is present.
o If a leak is detected, tighten the pipe connections and repeat leak test.
o Light the main burner.
o With the main burner in operation, paint all piping connections from the valve with a soap and
water solution.
o If another leak is detected, tighten the connection.
o If after tightening the connections the leak is still present. replace the leaky part and, or valve.
Shut off the main gas supply before attempting replacement of parts or the valve.
o Using the soap and water solution test the pressure test ports and min rate screw to verify that
no leak is present.
o If a leak is detected tighten the screw and retest.
- If after tightening the pressure test port or min rate screw the leak is still present shut off main
gas supply and replace the valve.
SHUTDOWN PERFORMANCE TEST
WARNING:
Fire or Explosion Hazard.
Can cause severe irtiury or death.
Perform the safety shutdown check any time work is done on a gas system.
1. Place the appliance in operation. The pilot and main burners should be lit.
2. Place gas control knob in "PILOT" position. Main burner should extinguish and pilot should
remain lit.
3. Extinguish pilot Hame. Pilot gas safety shutoff proves complete shutdown due to the fact the
safety shutoff valve prohibits main burner and pilot gas How.
4. Wait at least five minutes for the safety magnet to reset and residual gas to clear from the
combustion chamber.
S. Relight pilot burner and operate the system through one complete cycle to ensure all functions
operate correctly.

MAINTENANCE
This valve is not field serviceable. There are no replaceable parts. Do not
disassemble,
or attempt replacement of any parts on or in the valve.
Improper adjustment or tampering with settings can result in severe
injury or death.
ACCESSORIES
3/~sealing pl~g fo! unused inlets and outlets (Typically 2 per valve)
0.972.058
for pilot burner connections for 1/4"
0.958.042
Disc adaptor for remote control
0.997.209
Other accessories available on request
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