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PILOT
ADJ
PILOT KEY
CAUTION: Should overheating occur or the gas supply
fails to shut off, DO NOT turn off or disconnect the
electrical supply to the pump. Instead, shut off the gas
supply at a location external to the boiler. Failure to
observe this precaution may aggravate the overheated
condition resulting in possible damage to the boiler and
injury to the user.
SECTION 4. Testing the Ignition Safety Shutoff.
The ignition system safety shutoff must be tested by
conducting the following method of tests:
For Standing Pilot Systems
a. With the main burners on, remove the pilot
adjustment cover screw.
* NOTE: There is no pilot adjustment cover on
Robertshaw 7200 gas valve.
b. Insert a small slot screw driver and turn the
adjustment screw clockwise until pilot
flame goes out. Note and count number of turns
made.
c. Gas valve will shut off main burners after about
three (3) minutes. End of test. If the gas valve
will not shut off, follow the instructions "To Turn
Off Gas To Boiler" and call service technician or
your gas supplier.
d. Return pilot adjustment screw counter-clock-
wise , same number of turns as in step (b).
ROBERTSHAW 7200 GAS VALVE
(Models 90, 135 & 180)
e. Replace pilot adjustment cover screw, then
follow the lighting instructions to get boiler
ready for operation.
FOR AUTOMATIC IGNITION SYSTEMS
Intermittent Ignition (IID)
1. Turn on power to the ignition systems and turn gas
supply off at the gas valve.
2. Check ignition module as follows:
a. Set the thermostat or controller above room
temperature to call for heat.
b. Watch for continuous spark at the pilot burner.
c. Time the spark operation. Time must be within
the lockout timing period (15 or 90 seconds).
d. Turn thermostat down to end call for heat and
wait 60 seconds on lockout models before
beginning step 3.
3. Turn on gas supply.
4. Set thermostat or controller above room tempera-
ture to call for heat.
5. Systems should start as follows:
a. Spark will turn on and pilot gas valve will open
at once. Pilot burner should ignite after gas
reaches the pilot burner.
b. Spark ignition should cut off when pilot flame is
established.
c. Main gas valve should open and main burner
should ignite after gas reaches the burner port.
27
Pilot Adjustment
Fig.# 8935.0