Altitude Derate Multiplier For U.s.a - Payne PG95 Installation, Start-Up, Operating And Service And Maintenance Instructions

c. Unblock return air to permit normal circulation.
d. Burners will re−light when furnace cools down.
2. Check Pressure Switch(es)
This control proves operation of the draft inducer blower.
a. Turn off 115−v power to furnace.
b. Disconnect inducer motor lead wires from wire harness.
c. Turn on 115−v power to furnace.
d. Set thermostat to "call for heat" and wait 1 minute. When
pressure switch is functioning properly, hot surface igniter
should NOT glow and control diagnostic light flashes a
status code 31. If hot surface igniter glows when inducer
motor is disconnected, shut down furnace immediately.
e. Determine reason low pressure switch did not function
properly and correct condition.
f. Turn off 115−v power to furnace.
g. Reconnect inducer motor wires, replace outer door, and
turn on 115−v power.
h. Blower will run for 90 sec before beginning the call for
heat again.
i. Furnace should ignite normally.
ALTITUDE
FT.
0–2000
2001–3000
3001–4000
4001–5000
5001–6000
6001–7000
7001–8000
8001–9000
9001–10,000
*Derate multiplier factors are based on midpoint altitude for altitude range.
Checklist
Table 19 – Altitude Derate Multiplier for U.S.A.
M
0-610
610-914
914-1219
1219-1524
1524-1829
1829-2134
2134-2438
2438-2743
2743-3048
66
1. Put away tools and instruments. Clean up debris.
2. Verify that the jumper is removed from the TEST/TWIN
terminal. Verify that there is nothing plugged into the PLT
connector. (Note: If there is a jumper connector plugged
into PLT, remove it and discard.) See Fig. 39.
3. Verify that the Blower/Heat Off Delay jumpers are set as
desired. See Fig. 39 and 71.
4. Verify that the blower (lower door in upflow position) and
control ("Main" or upper door in upflow position) doors are
properly installed.
5. Verify that the Status LED glows. If not, check that the
power supply is energized and that the blower door is
secure. See Fig. 62 to interpret diagnostic codes.
6. Cycle test furnace with room thermostat to be sure that it
operates properly with the room thermostat. Check all
modes including Heat, Cool and Fan.
7. Check operation of accessories per manufacturer's
instructions.
8. Review Owner's Manual with owner.
9. Attach entire literature packet to furnace.
PERCENT
OF
DERATE
0
4-6
6-8
8-10
10-12
12-14
14-16
16-18
18-20
DERATE
MULTIPLIER FACTOR*
1.00
0.95
0.93
0.91
0.89
0.87
0.85
0.83
0.81