Unit Start-Up; Placing The Furnace Into Operation; Gas Valve Operation; Priming Condensate Trap - Lennox G71MPP-36B-070 Installation Instructions Manual

FORYOUR SAFETY READ BEFORE OPERATING
,&,WARNING
,AWARNING
BEFORE BEFORE PLACING THE UNIT INTO OPERA-
TION, smell all around the furnace area for gas, Be sure to
smell next to the floor because some gas is heavier than air
and will settle on the floor,
The gas valve on the G71MPP is equipped with a gas con-
trol switch. Use only your hand to move the control switch,
Never use tools. If the switch will not move by hand, do not
try to repair it, Call a licensed professional service techni-
cian (or equivalent), Force or attempted repair may result in
a fire or explosion,
Placing the furnace into operation:
G71MPP units are equipped with an automatic ignition sys-
tem. Do not attempt to manually light burners on this fur-
nace. Each time the thermostat calls for heat, the burners
will automatically light. The ignitor does not get hot when
there is no call for heat on units with this ignition system,
-&WARNING
A, CAUTION
-&WARNING
Priming Condensate Trap
The condensate trap should be primed with water prior to
start-up to ensure proper condensate drainage. Either pour
10 fl, oz. (300 ml) of water into the trap, or follow these steps
to prime the trap:
1 - Follow the lighting instructions to place the unit into op-
eration,
2 - Set the thermostat to initiate a heating demand,
3 - Allow the burners to fire for approximately 3 minutes,
4- Adjust the thermostat to deactivate the heating de-
mand,
5 - Wait for the combustion air inducer to stop, Set the
thermostat to initiate a heating demand and again al-
low the burners to fire for approximately 3 minutes.
6- Adjust the thermostat to deactivate the heating de-
mand and again wait for the combustion air inducer to
stop. At this point, the trap should be primed with suffi-
cient water to ensure proper condensate drain opera-
tion,
Gas Valve Operation (Figure 44)
1 - STOP! Read the safety information at the beginning of
this section.
2 - Set the thermostat to the lowest setting,
3 - Turn off all electrical power to the unit,
4 - This furnace is equipped with an ignition device which
automatically lights the burners, Do not try to light the
burners by hand,
5 - Remove the upper access panel.
6 - Move the gas valve switch to the OFF position, See fig-
ure 44,
7 - Wait five minutes to clear out any gas. tf you then smell
gas, STOP! Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's instruc-
tions, If you do not smell gas go to next step.
8 - Move gas valve switch to the ON position, See figure
44, Do not force,
INLET
SUPPLY _
PRESSURE TAP
GAS VALVE
NEGATIVE AIR POSITIVE AIR MANIFOLD
PRESSURE PORT PRESSURE PORT PRESSURE TAP
OUTLET
GAS VALVE SHOWN IN OFF POSITION
FIGURE 44
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