Honeywell VR8305 User Manual page 6

Start-Up and Checkout
! WARNING
FIRE OR EXPLOSION HAZARD
CAN CAUSE PROPERTY DAMAGE,
SEVERE INJURY, OR DEATH
1. Do not force the gas control knob. Use only
your hand to turn the gas control knob. Never
use any tools.
2. If the gas control knob will not operate by
hand, the gas control should be replaced by a
qualified service technician.
GAS CONTROL KNOB SETTINGS
The gas control knob has two settings:
OFF prevents main burner gas flow.
ON permits main burner gas flow. Under control of the
thermostat and direct ignition module, gas can flow to the
main burner.
NOTE: Controls are shipped with the gas control knob in
the ON position.
PERFORM GAS LEAK TEST
! WARNING
FIRE OR EXPLOSION HAZARD
CAN CAUSE PROPERTY DAMAGE,
SEVERE INJURY, OR DEATH
Check for gas leaks with rich soap and water
solution anytime 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.
2. If a gas leak is detected, tighten the pipe connection.
3. Stand clear while lighting main burner to prevent
injury caused from hidden gas leaks that 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 gas control inlet and outlet
with rich soap and water solution.
5. If another gas leak is detected, tighten adapter screws,
joints, and pipe connections.
6. Replace the part if gas leak cannot be stopped.
TURN ON SYSTEM
Rotate the gas control knob counterclockwise
ON.
TURN ON MAIN BURNER
Follow instructions provided by appliance manufac-
turer or turn thermostat up to call for heat.
CHECK AND ADJUST GAS INPUT TO MAIN
BURNER
CAUTION
!
1. Do not exceed the input rating stamped on the
appliance nameplate, or manufacturer recom-
mended burner orifice pressure for the size
orifice(s) used. Ensure the main burner pri-
mary air supply is properly adjusted for com-
plete combustion (refer to the appliance manu-
facturer instructions).
2. IF CHECKING GAS INPUT BY CLOCK-
ING 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 70-
2602) and compare to the Btuh input rating
on the appliance nameplate.
3. IF CHECKING GAS INPUT WITH A MA-
NOMETER (PRESSURE GAUGE):
• Ensure the gas control knob is in the PILOT
position before removing the outlet pres-
sure tap plug to connect the manometer.
• Turn the gas control knob back to PILOT
when removing the manometer and replac-
ing 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 manom-
eter to replace 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 nameplate.
2. With the main burner operating, check the gas con-
trol 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. 1.
3. If necessary, adjust the pressure regulator to match
to
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. Using a screwdriver, turn the inner adjustment screw
clockwise
clockwise
sure.
6
to increase or
to decrease the main burner gas pres-
counter-