9
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, airflow tables and the wiring
diagram in this manual for the proper settings:
Table 2
Airflow adjustments heating mode
1
2
POSITION
OFF
OFF
A
0.90
ON
OFF
B
1.10
OFF
ON
C
N / A
ON
ON
D
N / A
SW1 – HEAT
DIP Switch Positions
Input
USGPH
Table 3
Airflow adjustments air conditioning mode
1
2
POSITION
OFF
OFF
A
5.0
ON
OFF
B
4.0
OFF
ON
C
3.5
ON
ON
D
3.0
SW2 – COOL
DIP Switch Positions
Output
Tons
Table 4
Airflow adjustments all modes
CFM HTG.
CFM A/C
% increase % increase
1
2
POSITION
or decrease or decrease
OFF
OFF
A
0%
0%
ON
OFF
B
10%
10%
OFF
ON
C
-10%
-10%
ON
ON
D
N/A
0%
SW3 – ADJ (Adjustment)
DIP Switch Positions
Table 5
Delay adjustments heating mode
Input
USGPH
1
2
POSITION
OFF
OFF
A
0.90
ON
OFF
B
1.10
OFF
ON
C
ALL
ON
ON
D
ALL
SW4 – Delay
DIP Switch Positions
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 electronic board supply 120 VAC for a humidifier on
the HUM terminal. 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 PSC electronic board or one of the
120 VAC terminals on the ECM electronic board can be
used to provide a constant supply of 120 VAC.
Also refer to the instructions supplied with the accessory.
2.13.3 Air Conditioner (or Heat Pump)
An air conditioning coil may be installed on the supply air
side ONLY.
WARNING
Poisonous carbon monoxide gas hazard.
Install the evaporator coil on the supply side of the
furnace ducting ONLY.
Never install on the return air side of the ducting an
evaporator coil. This can result in death, bodily injury
and/or property and/or unit damage.
A clearance of 15 cm (6") is required between the bottom
of the coil drain pan and the top of the heat exchanger. If
a heat pump is installed, a “dual-energy” thermostat, or
other control is required, in order to prevent the
simultaneous operation of the furnace and the heat pump.
It also prevents a direct transition from heating by way of
the heat pump to heating with oil. Refer to the thermostat
instructions or those of another control used for the
proper wiring.
Summary of Contents for AMP154SD
Page 17: ...17 Figure 9 Furnace Dimensions ...
Page 18: ...18 Figure 10 Wiring diagram 4 speed motor PSC ...
Page 19: ...19 Figure 11 Wiring diagram variable speed motor ECM ...
Page 20: ...20 Figure 12 Parts list with 4 speed motor PSC B500111A ...
Page 22: ...22 Figure 13 Parts list with variable speed motor ECM B50112A ...
