Daikin DM92SS, Руководство по установке

Страница: 33 / 48

33
5. Move the furnace gas valve manual control to the
OFF position.
6. Wait five minutes then smell for gas. Be sure check
near the floor as some types of gas are heavier than
air.
7. If you smell gas after five minutes, immediately follow
the Safety Considerations section of this manual. If
you do not smell gas after five minutes, move the
furnace gas valve manual control to the ON position.
8. Replace the burner compartment door.
9. Open the manual gas shutoff valve external to the
furnace.
10. Turn on the electrical power to the furnace.
11. Adjust the thermostat to a setting above room
temperature.
12. After the burners are lit, set the thermostat to desired
temperature.
Furnace Shutdown
1. Set the thermostat to the lowest setting. The
integrated control will close the gas valve and
extinguish flame. Following a 15 second delay, the
induced draft blower will be de-energized. The indoor
blower will shut down when the time delay expires.
2. Remove the burner compartment door and move the
furnace gas valve manual control to the OFF position.
3. Close the manual gas shutoff valve external to the
furnace.
4. Replace the burner compartment door.
Gas Supply Pressure Measurement
Gas Pressure Test
The line pressure supplied to the gas valve must be within
the range specified below. The supply pressure can be
measured at the gas valve inlet pressure tap or at a hose
fitting installed in the gas piping drip leg. The supply pressure
must be measured with the burners operating. To measure
the gas supply pressure, use the following procedure.
1. Turn OFF gas to furnace at the manual gas shutoff
valve external to the furnace.
2. Connect a calibrated water manometer (or
appropriate gas pressure gauge) at either the gas
valve inlet pressure tap or the gas piping drip leg. See
White-Rodgers 36J22 gas valve figure for location of
inlet pressure tap.
NOTE: If measuring gas pressure at the drip leg, a field-
supplied hose barb fitting must be installed prior to making
the hose connection. If using the inlet pressure tap on the
White-Rodgers 36J22 gas valve, then use the 36G/J Valve
Pressure Check Kit, Part No. 0151K00000S.
3. Turn ON the gas supply and operate the furnace and
all other gas consuming appliances on the same gas
supply line.
4. Measure furnace gas supply pressure with burners
firing. Supply pressure must be within the range
specified in the Inlet Gas Supply Pressure table.
If supply pressure differs from table, make the necessary
adjustments to pressure regulator, gas piping size, etc.,
and/or consult with local gas utility.
5. Turn OFF gas to furnace at the manual shutoff valve
and disconnect manometer. Reinstall plug before
turning on gas to furnace.
6. Turn OFF any unnecessary gas appliances stated in
step 3.
Gas Manifold Pressure Measurement and
Adjustment
Gas Range Nominal
Natural 3.2 - 3.8" w.c. 3.5" w.c.
Propane 9.7 - 10.3" w.c. 10.0" w.c.
Manifold Gas Pressure
Only small variations in gas pressure should be made by
adjusting the gas valve pressure regulator. The manifold
pressure must be measured with the burners operating. To
measure and adjust the manifold pressure, use the following
procedure.
1. Turn OFF gas to furnace at the manual gas shutoff
valve external to the furnace.
2. Turn off all electrical power to the system.
3. Outlet pressure tap connections:
White-Rodgers 36J22 valve: Back outlet pressure
test screw (inlet/outlet pressure tap) out one turn
(counterclockwise, not more than one turn).
4. Attach a hose and manometer to the outlet pressure
tap (White-Rodgers valve).
5. Turn ON the gas supply.
6. Turn on power and close thermostat “R” and “W”
contacts to provide a call for heat.
7. Measure the gas manifold pressure with burners
firing. Adjust manifold pressure using the Manifold
Gas Pressure table shown on this page.
8. Remove regulator cover screw from the outlet
pressure regulator adjust tower and turn screw
clockwise to increase pressure or counterclockwise to
decrease pressure. Replace regulator cover screw.
9. Turn off all electrical power and gas supply to the
system.
10. Remove the manometer hose from the hose barb
fitting or outlet pressure tap.
11. Replace outlet pressure tap: White-Rodgers 36J22
valve: Turn outlet pressure test screw in to seal
pressure port (clockwise, 7 in-lb minimum).
12. Turn on electrical power and gas supply to the
system.
13. Close thermostat contacts “R” and “W” to energize the
valve.
14. Using a leak detection solution or soap suds, check
for leaks at outlet or screw (White-Rodgers valve).
Bubbles forming indicate a leak. SHUT OFF GAS
AND REPAIR ALL LEAKS IMMEDIATELY!
15. NOTE: For gas to gas conversion, consult your dealer
for appropriate conversion.