Installation Manual

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Specifications subject to change without notice.
Final Wiring Check
IMPORTANT: Check factory wiring and field wire connections to
ensure terminations are secured properly. Check wire routing to
ensure wires are not in contact with tubing, sheet metal, etc.
A150636
Fig. 6 - Communicating Furnace or Fan Coil Wiring with
Communicating Variable Speed HP
A160125
A160126
Fig. 7 - Low Voltage Wiring (Non- Communicating)
Step 8 — Compressor Crankcase Heater
This compr e ssor has an internal crankcase heater. Furnish
power to the unit a minimum of 24 hr before starting the unit
for the first time.
Upon initial start- up of unit, status code 68 will be generated and
system will operate at stage 2 for 11 minutes. This operation is
important to system reliability and cannot be bypassed. Each time
high voltage is removed and reapplied this behavior will be
repeated.
To furnish power to heater only, set thermostat to OFF and close
electrical disconnect to outdoor unit.
Power is not required to the indoor unit or Wall Control for proper
operation of heater. Crankcase heater will be intelligently
energized as needed between operations, even when the Wall
Control or thermostat and indoor unit is not installed, as long as
there is power to the outdoor unit.
Airflow Setup for Observer
®
Wall Control
Furnace or FCM4X Fan Coil (communicating)
This system can only be installed with communicating indoor and
Observer Wall Control TSTAT0201CW with Version 5.0 or higher
software or newer. When using an Observer Wall Control, airflow
is automatically selected based on equipment size. The user has the
option of selecting Comfort, Efficiency and Max airflow for
Heating and/or Cooling modes. These should be selected based on
balance between the homeowner’s comfort and energy
consumption expectations. See Observer Wall Control Installation
Instructions for additional available adjustments.
Due to using a communicating control with the fan coil or the
furnace, dip switch adjustments are not necessary . The outdoor
unit configuration and the indoor airflows are determined by
communicating control setup.
Airflow Setup for Non- communicating Fan Coil
The system can be installed with a standard 2- stage heat pump
thermostat and FVM4X fan coil without additional accessories.
Select appropriate unit size on fan coil Easy select board.
Airflow Setup for Non- communicating Furnaces
For installations with non- communicating furnaces, set airflows to
350- 400 cfm/nominal ton in high stage and 70 - 80 percent of high
stage airflow in low stage.
Step 9 — Install Accessories
No refrigeration circuit accessories are required or are available for
installation within the unit. External to the unit, the same
accessories such as support feet, wind baffle etc., available on other
units, can also be used on this line of product. For models utilizing
23 inch x 23 inch base pans, it is recommended to use 5 support
feet in order to fully support unit. See Fig. 8. Refer to the
individual Installation Instructions packaged with kits or
accessories when installing.
A14008
Fig. 8 - Recommended Support Feet Location
(for 23” x 23” basepan)