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
wise 
, same number of turns as in step (b).
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.
3 | 2 | 1 |
|
| PILOT ADJ |
O F F | S E T P I L O T O N | |
PILOT KEY
Pilot Adjustment
Fig.# 8935.0
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.
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