9
Figure 8: Blower start/stop delays
Board # 1158
Table 5: Delay adjustments - heating mode
SW4 – Delay
2.12 SUPPLY
AIR
ADJUSTMENTS
(ECM
VARIABLE
SPEED
MOTORS)
On units equipped with ECM variable speed blower motors,
the air supply must be adjusted based on heating/air
conditioning output. The start/stop delays of the blower must
also be adjusted by positioning the DIP switches on the
electronic board. Refer to the following tables, air flow table 7
and the wiring diagram, figures 10 and 11 in this manual for
the proper settings:
Table 2: Supply air adjustments, ECM variable speed
motors, heating mode
SW1 – HEAT
DIP Switch Positions
1 2
POSITION
Input
USGPH
OFF OFF
A
0.70
ON OFF
B
0.60
OFF ON
C
0.50
ON ON
D
ALL
Table 3: Supply air adjustments, ECM variable speed
motors, air conditioning mode
SW2 – COOL
DIP Switch Positions
1 2
POSITION
Output
Tons
OFF OFF
A
3.0
ON OFF
B
2.5
OFF ON
C
2.0
ON ON
D
1.5
Table 4: CFM adjustments, all modes
SW3 – ADJ (Adjustment)
DIP Switch Positions
1 2
POSITION
CFM HTG.
% increase
or decrease
CFM A/C
% increase
or decrease
OFF OFF
A
0%
0%
ON OFF
B
+10%
+10%
OFF ON
C
-10%
-10%
ON ON
D
N/A
0%
DIP Switch Positions
Input
1 2
POSITION
USGPH
OFF OFF
A
0.70
ON OFF B
0.60
OFF ON
C
0.50
ON ON D
ALL
2.13 INSTALLATION
OF
ACCESSORIES
WARNING
Electrical shock hazard.
Turn OFF electrical power at the fuse box or service
panel before making any electrical connections and
ensure a proper ground connection is made before
connecting line voltage.
Failure to do so can result in death or bodily injury.
2.13.1 Humidifier
(HUM)
The 120 VAC HUM terminal on the electronic board of the
blower is tied directly to terminal 8 of the 9-terminal
connector of the electronic board. It supplies 120 VAC
electric power when the burner is in operation.
A 24 VAC signal can also be supplied from the W and C
terminals on the blower electronic board to activate a
switching relay.
Also refer to the instructions supplied with the accessory.
2.13.2 Electronic Air Cleaner (EAC)
The EAC terminal on the electronic board supplies 120
VAC when the blower is operating in the heating or air
conditioning mode. This signal can be used to activate an
electronic air cleaner that is not equipped with an air flow
switch. If the cleaner is equipped with an air flow switch,
the S terminal on the electronic board or one of the 120
VAC terminal on the ECM electronic card can be used to
provide a constant supply of 120 VAC.
Also refer to the instructions supplied with the accessory.
Содержание AMP098SD
Страница 17: ...Figure 9 Furnace dimensions 17 ...
Страница 18: ...Figure 10 Wiring diagram 4 speed motor PSC 18 ...
Страница 19: ...Figure 11 Wiring diagram variable speed motor ECM 19 ...
Страница 20: ...Figure 12 Parts list with 4 speed motor PSC 20 B50064H ...
Страница 22: ...Figure 13 Parts list with variable speed motor ECM 22 B50074H ...