Table of Contents
Advertisement
Installer's Guide
ECM Fan Motor Adjustments
If the airflow needs to be increased or decreased, see the
Airflow Table in the SERVICE FACTS. Information on changing
the speed of the blower motor is in the Blower Performance
Table. Blower speed changes are made on the ECM Fan
Control mounted in the control box. The ECM Fan Control
controls the variable speed motor. There is a bank of 8 dip
switches, (See Figure 19 below), located on the board. The dip
switches work in pairs to match the cooling/heat pump airflow
(CFM/TON), Fan off-delay options and electric heat airflow
adjustment. The unit ships with dip switches defaulted as
shown below.
CFM
SELECTION
LIGHT
Figure 19. ECM Fan Control
Final Installation Checklist
o
Does the unit run and operate as described in the section on
Sequence of Operation, page 19, in response to the room
thermostat?
o
Are the condenser fan and indoor blower operating correctly
with proper rotation and without undue noise?
o
Is the compressor operating correctly and has the system been
checked with a charging chart?
o
Has the voltage and running current been checked to deter
mine if it is within limits?
o
Has the thermostat been checked for calibration and the air
discharge grills adjusted to balance the system?
o
Has the ductwork been checked for air leaks and
condensation?
o
Has the furnace manifold pressure been checked and
adjusted if necessary?
o
Has the heating air temperature rise been checked?
o
Has the unit been checked for tubing and sheet metal rattles?
Are there any other unusual noises to be checked?
o
Are all covers and panels in place and properly fastened?
o
Has the owner been instructed on the proper operation and
maintenance of the unit? Be sure to leave this manual with the
owner.
Page 20
DIP
SWITCHES
Maintenance
Owner Maintenance
Some of the periodic maintenance functions of the 4WCZ6 unit can
be performed by the owner; this includes replacing the disposable
or cleaning the permanent air filters, cleaning the unit cabinet,
cleaning the condenser coil, and conducting a general unit inspec-
tion on a regular basis.
Filters
When the system is in constant operation, inspect the filters at
least once each month.
If the unit has disposable-type filters, replace them with new filters
of the same type and size. Do not attempt to clean disposable
filters.
Permanent-type filters can be cleaned by washing them with a mild
detergent and water. Make sure that the filters are thoroughly dry
before reinstalling them in the unit (or duct system).
NOTE: It may be necessary to replace permanent filters
annually if washing fails to clean the filter or if the filter shows
signs of deterioration. Be sure to use the same type and size
as was originally installed.
Condenser Coil
Be sure to keep all vegetation and debris away from the condenser
coil area.
Service Maintenance
Cooling Season
To keep the unit operating safely and efficiently, the manufacturer
recommends that a qualified service technician check the entire
system at least once each season or sooner if needed. The service
technician should examine these areas of the 4WCZ6 unit:
● filters (for cleaning or replacement)
● motors and drive system components (for proper operation)
● economizer gaskets (for possible replacement)
● safety controls (for mechanical cleaning)
● electrical components and wiring (for possible replacement and
connection tightness)
● condensate drain (for proper sealing and cleaning)
● unit duct connections (to see that they are physically sound and
sealed to the unit casing)
● unit mounting support (for structural integrity)
● the unit (for obvious unit deterioration)
Heating Season
Complete the following unit inspections and service routines at the
beginning of each heating season.
● Visually inspect the unit to ensure that the airflow required for
combustion and condenser coil is not obstructed from the unit.
● Inspect the control panel wiring to verify that all electrical connec-
tions are tight and that the wire insulation is intact.
Advertisement
Table of Contents
