Honeywell VR8304 User Manual download pdf (Page 6)

VR8304 INTERMITTENT PILOT COMBINATION GAS CONTROL

69-0625—03 6

Perform Gas Leak Test

WARNING

Fire or explosion hazard. Can cause property

damage, severe injury, or death.

Check for gas leaks with a rich soap and water

solution any time work is done on a gas

control.

Gas leak test

1. Paint all pipe connections upstream of the gas con-

trol with a rich soap and water solution. Bubbles

indicate a gas leak.

If a gas leak is detected, tighten the pipe connection.

3. Stand clear while lighting the main burner to prevent

injury caused from hidden gas leaks, which could

cause flashback in the appliance vestibule. Light

the main burner.

4. With the main burner in operation, paint all pipe

joints (including adapters) and the gas control inlet

and outlet with a rich soap and water solution.

5. If another gas leak is detected, tighten adapter

screws, joints, and pipe connections.

6. Replace the part if the gas leak cannot be stopped.

Adjust the Pilot Burner Flame

The pilot flame should envelop 3/8 to 1/2 in. (10-13 mm) of

the igniter sensor tip. See Fig. 9. To adjust the pilot flame:

1. Remove the pilot adjustment cover screw. Refer to

Fig. 4.

2. Turn the inner adjustment screw clockwise to

decrease or counterclockwise to increase the

pilot flame.

3. Always replace the cover screw after adjustment

and tighten firmly to ensure proper operation.

Fig. 9. Proper flame adjustment.

Check and Adjust Gas Input to

Main Burner

CAUTION

Do not exceed the input rating stamped on the

appliance nameplate or the manufacturer’s

recommended burner orifice pressure for the size of

orifice(s) used. Ensure the main burner primary air

supply is properly adjusted for complete combustion

(refer to the appliance manufacturer’s instructions).

2. IF CHECKING GAS INPUT BY CLOCKING THE

GAS METER:

• Ensure that the only gas flow through the meter

is that of the appliance being tested.

• Ensure that other appliances are turned off and

that their pilot burners are extinguished (or deduct

their gas consumptions from the meter reading).

• Convert the flow rate to Btuh as described in the

Gas Controls Handbook (form number 70-2602)

and compare to the Btuh input rating on the

appliance nameplate.

3. IF CHECKING GAS INPUT WITH A MANOMETER

(PRESSURE GAUGE):

• Ensure the gas control knob is in the PILOT

position before removing the outlet pressure tap

plug to connect the manometer.

• Turn the gas control knob back to PILOT when

removing the manometer and replacing the

outlet pressure tap plug.

• Shut off the gas supply at the appliance service

valve or, for LP gas, at the gas tank before

removing the outlet pressure tap plug and before

disconnecting the manometer and replacing the

outlet pressure tap plug.

• Perform the gas leak test at the inlet pressure

tap plug.

Standard-opening and slow-opening

pressure regulator

1. The gas control outlet pressure should match the

manifold pressure listed on the appliance name-

plate.

2. With the main burner operating, check the gas con-

trol flow rate using the meter docking method or

check the gas pressure using a manometer con-

nected to the gas control outlet pressure tap. Refer

to Fig. 4.

If necessary, adjust the pressure regulator to match the

appliance rating. Refer to Table 5 or 6 for the factory

set nominal outlet pressures and adjustment ranges.

a. Remove the pressure regulator adjustment cap

and screw.

b. b.Using a screwdriver, turn the inner adjustment

screw clockwise to increase, or counter-

clockwise to decrease, the main burner gas

pressure.

c. Always replace the cap screw and tighten firmly

to ensure proper operation.

If the desired outlet gas pressure or gas flow rate can-

not be achieved by adjusting the gas control, check

the gas control inlet pressure using a manometer at

the inlet pressure tap. If the inlet pressure is in the nor-

mal range (refer to Table 6 or 7), replace the gas con-

trol. Otherwise take the necessary steps to provide

proper gas pressure to the gas control.

Step-opening pressure regulator

The gas control outlet pressure should match the

manifold pressure listed on the appliance nameplate.

2. With the main burner operating, check gas control

flow rate using the meter clocking method or check

the gas pressure using a manometer connected to

the gas control outlet pressure tap. Refer to Fig. 4.

If necessary, adjust the pressure regulator to match

the appliance rating. Refer to Table 5 or 6 for factory-

set nominal outlet pressures and adjustment ranges.

a. Remove pressure regulator adjustment cap

screw.

b. Using a screwdriver, turn the inner adjustment

screw clockwise to increase or counter-

clockwise to decrease the main burner gas

pressure.

c. Always replace the cap screw and tighten firmly

to ensure proper operation.

If the desired outlet pressure or flow rate cannot be

achieved by adjusting the gas control, check the inlet

pressure using a manometer at inlet pressure tap or

upstream of the gas control. If the inlet pressure is in the

normal range (refer to Table 6 or 7), replace the existing

gas control. Otherwise, take the necessary steps to

provide proper gas pressure to the gas control.

PROPER FLAME

ADJUSTMENT

IGNITER-

SENSOR

M3080A

3/8 TO 1/2 INCH

(10 TO 13 mm)

1 2 3 4 5 6 7 8

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Honeywell VR8304 User Manual Page 6

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