Before operating furnace, check each manual reset switch for
continuity. If necessary, press and release button to reset switch.
The blower compartment door must be in place to complete the
115-v circuit to the furnace.
CAUTION:
FIRE HAZARD
Failure to follow this caution may result in intermittent
unit operation or performance satisfaction.
This furnace is equipped with a manual reset limit switch
in the burner box area. The switch will open and shut off
power to the gas valve if a flame rollout or overheating
condition occurs in the burner enclosure area. DO NOT
bypass the switch. Correct inadequate combustion-air
supply, component failure, or restricted flue gas passage-
way before resetting the switch.
II.
PRIME CONDENSATE TRAP WITH WATER
CAUTION:
UNIT MAY NOT OPERATE
Failure to follow this caution may result in intermittent
unit operation or performance satisfaction.
Condensate trap must be PRIMED or proper draining
may not occur. The condensate trap has internal chambers
which can ONLY be primed by pouring water into the
inducer drain side of condensate trap.
1. Remove upper inducer housing drain connection cap. (See
Fig. 50.)
2. Connect field-supplied 1/2-in. ID tube to upper inducer
housing drain connection.
3. Insert field-supplied funnel into tube.
4. Pour 1 quart of water into funnel/tube. Water should run
through inducer housing, overfill condensate trap, and flow
into open field drain. (See Fig. 51.)
5. Remove funnel and tube from inducer housing and replace
drain connection cap and clamp.
III.
PURGE GAS LINES
After all connections have been made, purge the gas lines and
check for leaks.
Fig. 48—Example of Field Drain Attachment
A94054
OPEN STAND
PIPE FOR
A/C OR
HUMIDIFIER
DRAIN
TEE
TO OPEN
DRAIN
Fig. 49—Condensate Trap Heat Tape
A93036
CONDENSATE TRAP
WIRE TIE(S)
HEAT TAPE
(3 WRAPS MINIMUM)
TABLE 9A—FURNACE SETUP SWITCH DESCRIPTION
SETUP
SWITCH
NO.
SWITCH
NAME
NORMAL
POSITION
DESCRIPTION
OF
USE
SW-1
Adaptive
Heat
Mode
OFF
Allows 2-stage operation with a
single-stage thermostat when
connected between R to W2.
Turn on when using 2-stage
thermostat to allow Low Heat
operation when R to W/W1 closes
and High Heat operation when
R to W/W1 and W2 close.
SW-2
Blower
OFF
delay
ON or OFF
Control blower OFF
delay time. Used in
conjunction with SW-3.
See Table 9B.
SW-3
Blower
OFF
delay
ON or OFF
Control blower OFF
delay time. Used in
conjunction with SW-2.
See Table 9B.
TABLE 9B—BLOWER OFF DELAY SETUP SWITCH (SW)
2–STAGE UNITS WITH PSC BLOWER MOTORS
DESIRED HEATING MODE
BLOWER-OFF DELAY (SEC)
SETUP SWITCH
SW-2
SW-3
90
OFF
OFF
120
OFF
ON
150
ON
OFF
180
ON
ON
—36—
Содержание CONDENSING GAS FURNACE 352MAV
Страница 51: ...51...
