Introduction; Modes Of Operation; Electrical Connections - Trane ACONT900AC43UA Service Manual

Introduction

The whole house air cleaner can be installed either as
part of a Communicating heating and air conditioning
system or as part of a traditional 24 volt system.
When installed as part of a Communicating System
in which the indoor unit, outdoor unit, and 900 series
comfort control are equipped with our exclusive
Communicating technology, this system performs a
continuous loop of system diagnostics and data
output. The Communicating System monitors itself
and quickly identifies any operational faults,
automatically issuing a service alert if needed. The
whole house air cleaner can also be installed as part
of a traditional 24 volt heating and air conditioning
system.

Modes of Operation

The whole house air cleaner can be connected in one
of two modes of operation; either a 24 V mode or a
communicating mode. To know how the whole house
air cleaner is set up, reference Figure 1a to find the
amber light. A steady amber light indicates that the
unit is wired in the 24 V mode. A blinking amber light
indicates that the unit is wired in the communicating
mode. No light present means that the unit is not
connected.
Safety Hazard. Sharp Edge Hazard. Be careful of
sharp edges on equipment or any cuts made on sheet
metal while installing or servicing. Personal injury may
result.

Electrical Connections

The air cleaner requires 24 VAC power and indoor fan
signal to operate. A transformer adequately sized to
power both the system and air cleaner is provided
with the air cleaner. Remove the transformer in the
indoor unit and replace with the transformer provided.
CAUTION
Electronic Air Cleaners
Note: A 50 VA transformer is required for furnace ap-
plications and 75 VA required for air handler applica-
tions. If the indoor air handler already has a properly
sized transformer, no replacement is required.
Note: Dual circuited air handlers matched with heat
pumps and oil furnaces will require an accessory Trans-
former KIT# BAYTRANS12024 to power the air cleaner.
Do NOT replace air handler transformer with the trans-
former supplied with the air cleaner.
Note: When more than one whole house air cleaner is
used, the 24 volt transformer which supplies power to
the air cleaner will need to be increased by 25 VA for
each additional air cleaner added.
Note: Provide adequate strain relief for the low voltage
cable at the indoor unit.
Note: Wiring penetration must be sealed.
AC - A 3