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Raypak 0180B User Manual

Page 27

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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

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