Table of Contents
22 | Electronic Thermostat
CAUTION: Do not set the ADJ DIP switch to
the (-) setting when electric heaters are
installed. Doing so may cause the heaters to
cycle on their thermal overload switches,
potentially shortening the life of the
switches.
DANGER: Always disconnect power before
changing DIP switch positions on the
interface board and reset the unit
afterward.
Dehumidification Method Selector
Dehumidification method selector (Figure #51, item
[11]) must be set to NO for cool to dehumidify method
as below.:
•
On dehumidification call, the heat pump fan will
operate at a lower speed to increase
dehumidification while cooling. Dehumidification
selector ((Figure #51), item [11]) should be
selected to 'NO'.
In this mode, the heat pump will only dehumidify the
space when it is running in cooling mode.
Dehumidification indicator LED (Figure #51, item [4])
will energize when dehumidification call is present.
Figure # 53
8733942411 (2017/07)
ELECTRONIC THERMOSTAT
Installation
Thermostat wire must be 8-conductor, 18-AWG wire.
Strip the wires back 1/4-inch (longer strip lengths may
cause shorts) and insert the thermostat wires into the
heat pump connector as shown below. The thermostat
should have the same type connectors as shown below,
requiring the same wiring. If thermostat connectors are
different than below, please refer to thermostat's
installation and operations manual for detailed
installation and operation All thermostat should be
configured according the specifications outlined in the
installation and operation manual for proper
commission and operations.
If you would like to use 2 stages of electrical heat
with a single terminal on your thermostat, please
place a jumper cable between W1 and W2 cable as
shown below. (See Figure # 54)
Packaged heat pumps are equipped with detachable
Thermostat connectors located on the ECM Interface
board.
Depending on the options selected, some wires in the
Wiring Harness may be utilized please see the
Wiring Harness Drawing notes for further details.
Subject to change without prior notice
SM Series Heat Pump
Figure # 54
SM Series Heat Pump
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