ICP 8MPT Installation Insrtuctions page 24

Electrical Connections
*8MPV
NOTE: Junction Boxcan be mounted to eitherthe left or right side.
115M 60 Hz.
Ground
I LowVoltage
I TerminalBoard
I
I I
i
I r
_ SingleStage
Thermostat
LowVoltage
TerminalBoard
.......
I
I
_ TwoStage '
TheLmostat jI
J
Motor
Control
NOTE:115VAC/60Hz,/single-phase
Operatingvoltagerange*:127VACmax, 104VACrain,
Variable Speed
Motor
* Permissiblelimits ofvoltage atwhich unit will operatesatisfactorily
Electrical Connections
*8MPT
NOTE:Junction Box can be mounted to eitherthe left or right side.
115M 60 Hz.
NOTE:115VAC/60Hz,/single-phase
Operatingvoltagerange*:127VACmax, 104VACrain,
* Permissiblelimits ofvoltage atwhich unit will operatesatisfactorily
25-25-06
25-25-06a
Control Connections
Furnace Control Fuse
The 24V circuit contains a 5-amp, automotive-type fuse located
on furnace control board. (See Figure 21) Any electrical shorts to
24V wiring during installation, service, or maintenance may cause
fuse to blow. If fuse replacement is required, use only a fuse of
identical size (5 amp.).
Tap Select Interface Board (*8MPV)
The Tap Select Interface Board is used with the Variable Speed
motor. There are DIP switches (SW2) for continuous blower
adjust, heating blower adjust, cooling blower adjust and cooling
on/off delay profiles. There is a jumper (J1) for slight blower
adjustment, increase (+)/no change (NOM)/decrease (-). There is
a jumper (J2) for airflow selection of Heat Pump EFFICIENCY or
COMFORT. (EFFICIENCY provides no airflow reduction in airflow
whether O is energized or not. COMFORT provides a 10%
reduction in airflow when O is not energized with a cooling call).
The O terminal is available for use for Heat Pump applications, if
desired.
The Y1 terminal (if a two-stage Air Conditioner or two-stage Heat
Pump is used) will provide low cooling blower speed when
energized. (Only Y/Y2 on the furnace control board is used if a
single-stage Air Conditioner or Heat Pump is installed)
44101 202301
Specifications are subject to change without notice
24