White Rodgers Marine Radio 36C74 User Manual

Type 36C74  
Combination Gas Valve  
WHITE-RODGERS  
INSTALLATION INSTRUCTIONS  
Operator: Save these instructions for future use!  
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE  
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY  
AND/OR PROPERTY DAMAGE.  
DESCRIPTION  
The 36C74 Gas Valve is for use on systems providing  
automatic ignition of the pilot and/or main burners and  
ON  
incorporates the following features: pilot/redundant sole-  
O F F  
noid valve, main valve, integral pressure regulator and  
male spade terminals for point-to-point wiring.  
This gas valve is also equipped with a step-opening  
feature to provide for quieter main burner ignition. The  
valve opens partially until main burner flame is estab-  
lished, then the valve opens to full operating pressure.  
SPECIFICATIONS  
Electrical Rating:  
PIPE SIZES/CAPACITIES  
24 VAC (30 Volts max. Voltage), 60 Hz.  
Capacity (BTU/hr) at  
1" pressure drop across valve  
Types of Gases: Natural or LP Gas  
Pressure Rating: 14” W.C. (12 PSI)  
Nat. Gas  
LP Gas  
Pipe Size (1000 BTU/cu. ft., (2500 BTU/cu. ft.,  
Ambient Temperature: -40° to 175°F (-40° to 79°C)  
64 Sp. Gr.)  
1.53 Sp. Gr.)  
(inches)  
1
2" x 3/8  
2" x 1/2  
2" x 3/4  
4" x 3/4  
"
"
"
"
100,000  
230,000  
230,000  
280,000  
162,000  
372,600  
372,600  
453,600  
Regulator Adjustment Range:  
Natural Gas: 2.5” to 5.0” W.C. (Full flow)  
LP Gas: 7.5” to 12.0” W.C. (Full flow)  
(Step pressure not adjustable)  
/
/
/
/
1
1
3
Upright, 90° from upright or vertical  
INLET BOSS  
UPRIGHT  
UP OR DOWN  
CONTENTS  
LEFT OR RIGHT  
Description ......................................................... 1  
Specifications ..................................................... 1  
Precautions ........................................................ 2  
Installation .......................................................... 3  
Main Piping Connection  
O F F  
ON  
Pilot Gas Connection  
System Wiring  
Adjustment ......................................................... 4  
Pilot Flame Adjustment  
NOTE: Control shown may not be identical  
to replacement control.  
Pressure Regulator Adjustment  
Pilot Lighting Instructions and Precautions ........ 5  
Figure 1. Mounting Positions  
WHITE-RODGERS DIVISION  
EMERSON ELECTRIC CO.  
9797 REAVIS ROAD  
ST. LOUIS, MISSOURI 63123-5398  
PART NO. 37-5868A  
Printed in U.S.A.  
Replaces 37-5153A  
9732  
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INSTALLATION  
MAIN PIPING CONNECTIONS  
Drop  
NOTE  
Horizontal  
All piping must comply with local codes, ordinances,  
and/or national fuel gas codes.  
1. Turn off electrical power to the system at the fuse box  
or circuit breaker. Also turn off the main gas supply.  
2. If replacing an existing valve, disconnect all plumbing  
and electrical connections from the old control.  
Gas Valve  
NOTE:  
Always Include  
A Drip Leg In Piping  
Riser  
3 in.  
minimum  
3. The valve may be installed in any position except  
upside down. The arrow on the bottom plate indi-  
cates the direction of gas flow through the valve.  
Drop  
Tubing Gas  
Supply  
Gas Valve  
Riser  
4. You should use new pipe that is properly chamfered,  
reamed, and free of burrs and chips. If you are using  
old pipe, be sure it is clean and free of rust, scale,  
burrs, chips, and old pipe joint compound.  
Horizontal  
5. Apply pipe joint compound (pipe dope) or teflon tape  
that is approved for all gases, only to the male  
threads of the pipe joints. DO NOT apply com-  
pound or teflon tape to the first two threads (see fig. 2  
for typical piping connections).  
Gas Valve  
3 in.  
minimum  
3 in.  
minimum  
Piped Gas  
Supply  
Piped Gas  
Supply  
6. If you are using a vise or open-end wrench to hold the  
valve while installing piping, do not tighten exces-  
sively, as this may damage the valve.  
Figure 2. Typical gas valve piping  
7. See SYSTEM WIRING when making electrical con-  
nections. After all gas and electrical connections are  
completed, turn gas on and check for gas leaks with  
leakdetectionsolutionorsoapsuds. Bubblesforming  
indicate a leak. SHUT OFF GAS AND FIX ALL  
LEAKS IMMEDIATELY.  
PILOT GAS CONNECTION  
The valve is shipped with the pilot outlet plugged. For  
installations requiring pilot gas, remove the plug and use  
the fitting packed separately with the control.  
PRESS  
Pilot Gas  
Outlet  
PILOT  
Install fitting into pilot gas outlet (see fig. 3), turning until  
finger-tight. Insert clean, deburred tubing all the way  
through the fitting. While holding the tubing securely,  
slowly tighten fitting until you feel a slight “give”. Tighten  
the fitting an additional 112 turns.  
TAP  
Gas Outlet  
Figure 3. Gas valve side view  
3
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INSTALLATION (con’t)  
SYSTEM WIRING  
All wiring should be installed in accordance with local and  
national electrical codes and ordinances.  
NOTE  
REFER TO AND FOLLOW THE APPLIANCE  
MANUFACTURER’S WIRING DIAGRAM. REFER TO  
FIG. 4 FOR TERMINAL IDENTIFICATION.  
Check that the electrical power supply used agrees with  
the voltage and frequency shown on the gas control.  
Main Valve  
1
2
Redundant  
Valve Coil  
(Pilot Valve)  
3
4
Figure 4. Typical gas valve wiring  
ADJUSTMENT  
PILOT FLAME ADJUSTMENT  
PRESSURE REGULATOR  
ADJUSTMENT  
This control was factory preset and will not normally  
require additional adjustment of pilot flame.  
The pressure regulator has been factory adjusted for  
3.5” W.C. (Natural Gas, full flow) or 11.0” W.C. (LP Gas,  
full flow). Although additional adjustments will not nor-  
mally be necessary, the regulator may be adjusted if  
required. Do not force the adjusting screw beyond the  
limits that it can easily be adjusted.  
If the pilot flame is low and does not engulf the bulb of the  
mercury flame sensor, the system will not energize the  
main valve.  
If pilot gas pressure is too high, gas will sputter past the  
ignition electrode, and may not ignite. High pilot gas  
pressure may also cause the flame to lift off the burner,  
causing the flame sensor bulb to sense “low” heat.  
1. Attach a manometer to the outlet pressure tap of the  
valve.  
2. Energize valve to ignite main burner.  
To adjust the pilot flame, remove the pilot adjust cover  
screw and gasket (see fig. 6) to expose adjusting screw.  
To REDUCE pilot flame, turn the pilot adjust screw  
clockwise. To INCREASE pilot flame, turn the pilot  
adjustscrewcounterclockwise.Replaceandtightencover  
screw and gasket.  
3. Remove “Reg. Adj.” cover screw (see fig. 6).  
4. To DECREASE outlet pressure, turn the adjusting  
screw (beneath the cover screw) counterclockwise.  
To INCREASE outlet pressure, turn the adjusting  
screw clockwise.  
5. Replacethecoverscrew. Cyclethevalvetwoorthree  
times to verify regulator setting.  
Pilot Adjust  
Cover Screw  
NATURAL-LP  
GAS SELECTOR  
Gasket  
REGULATOR  
COVER SCREW  
ON  
O F F  
PILOT ADJUST  
COVER SCREW  
Pilot  
Adjust  
Screw  
Figure 5. Pilot flame adjustment  
Figure 6. Gas valve top  
4
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PILOT LIGHTING INSTRUCTIONS  
AND PRECAUTIONS  
FOR YOUR SAFETY READ BEFORE LIGHTING  
If you do not follow these instructions exactly, a fire or explosion  
may result causing property damage, personal injury or loss of life.  
!
WARNING  
A. This appliance is equipped with an intermittent ignition  
device which automatically lights the pilot. Do NOT try to  
light the pilot by hand.  
phone. Follow the gas supplier’s instructions.  
If you cannot reach your gas supplier, call the fire  
department.  
B. BEFORE LIGHTING, smell all around the appliance area  
for gas. Be sure to smell next to the floor because some  
gas is heavier than air and will settle on the floor.  
C. Use only your hand to push in or turn the gas control knob.  
Never use tools. If the knob will not push in or turn by  
hand, don’t try to repair it; call a qualified service techni-  
cian. Force or attempted repair may result in a fire of  
explosion.  
FOR YOUR SAFETY  
“WHAT TO DO IF YOU SMELL GAS”  
Do not try to light any appliance.  
D. Donotusethisapplianceifanyparthasbeenunderwater.  
Immediately call a qualified service technician to inspect  
theapplianceandtoreplaceanypartofthecontrolsystem  
and any gas control that has been under water.  
Do not touch any electrical switch; do not use any  
phone in your building.  
Immediatelycallyougassupplierfromaneighbor’s  
LIGHTING INSTRUCTIONS  
1. STOP! Read the precautionary information above.  
7. Wait five (5) minutes to clear out any gas. If you then smell  
gas, STOP! Follow B in the precautionary information  
above. If you don’t smell gas, go to next step.  
2. Set the thermostat to lowest setting.  
3. Turn off all electrical power to the appliance.  
8. Turn knob on gas control counterclockwise to ON.  
9. Replace pilot access panel(s).  
4. This appliance is equipped with an intermittent ignition  
device which automatically lights the pilot. Do NOT try to  
light the pilot by hand.  
10. Turn on all electrical power to the appliance.  
11. Set thermostat to desired setting.  
5. Remove the pilot access panel(s) located under the gas  
control unit.  
12. If the appliance will not operate, follow the instructions “To  
Turn Off Gas To Appliance” and call your service techni-  
cian or gas supplier.  
6. Push in gas control knob slightly and turn clockwise to  
OFF (see Figure 7).  
NOTE: Knob cannot be turned to OFF unless knob is  
depressed slightly. Do not use tools or excessive force.  
TO TURN OFF GAS TO APPLIANCE  
1. Set the thermostat to lowest setting.  
4. Depress gas control knob slightly and turn clockwise to  
OFF. Do not use tools or excessive force.  
2. Turn off all electrical power to the appliance if service is to  
be performed.  
5. Replace control access panel.  
3. Remove control access panel  
Gas Cock  
Knob  
Indicator  
Figure 7. Gas Cock Knob  
5
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If you need more information about this product, please write to us at:  
WHITE-RODGERS DIVISION, Emerson Electric Co.  
9797 Reavis Road  
St. Louis, MO 63123-5398  
Attn: Technical Service Department  
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