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Installer’s Guide
Owner Maintenance
Some of the periodic maintenance functions of the WC unit can
be performed by the owner; this includes replacing the dispos-
able or cleaning the permanent air filters, cleaning the unit
cabinet, cleaning the condenser coil, and conducting a general
unit inspection on a regular basis.
Filters
When the system is in constant operation, inspect the filters
at least once each month.
If you have 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
Unfiltered air circulates through the unit's condenser coil and
can cause the coil’s surface to become clogged with dust, dirt,
and so on. To clean the coil, flush with low pressure water from
the inside out, such as using a garden hose with the nozzle
removed.
Be sure to keep all vegetation away from the condenser coil
area.
Maintenance
Service Maintenance
Cooling Season
To keep the unit operating safely and efficiently, the manufac-
turer recommends that a qualified servicer check the entire
system at least once each year or sooner if needed. The
serviceman should examine these areas of the WC unit:
●
filters (for cleaning or replacement)
●
motors and drive system components
●
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
described 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
connections are tight and that the wire insulation is intact.
Does the unit run and operate as described in the section on
“Sequence of Operation” in response to the room thermostat?
Are the condenser fan and indoor blower operating correctly
with proper rotation and without undue noise?
Is the compressor operating correctly and has the system been
checked with a charging chart?
Has the voltage and running current been checked to deter
mine if it is within limits?
Has the thermostat been checked for calibration and the air
discharge grilles adjusted to balance the system?
Final Installation Checklist
Has the ductwork been checked for air leaks and
condensation?
Has the furnace manifold pressure been checked and
adjusted if necessary?
Has the heating air temperature rise been checked?
Has the unit been checked for tubing and sheet metal rattles?
Are there any other unusual noises to be checked?
Are all covers and panels in place and properly fastened?
Has the owner been instructed on the proper operation and
maintenance of the unit? Be sure to leave this manual with the
owner.
Indoor Fan Motor Speed Tap Setting
The 208/230 and 460 Volt units are factory set to high speed with
one exception. The YC*3030 is factory set to low speed.
208/230 Volt Motor Tap Settings (Figure 21)
High speed setting: On the IGN board:
1. Connect the "RD" wire to the "PARK" terminal.
2. Connect the (IDM) PR wire to the "BLOWER LOAD" terminal.
Low speed setting: On the IGN board:
1. Connect the "RD" wire to the "BLOWER LOAD" terminal.
2. Connect the (IDM) PR wire to the "PARK" terminal.
460 Volt Motor Tap Settings (Figure 22)
High speed setting (460V):
1. At the "FTBA", connect the "PR" wire from the IGN board to
the "HI" (B) terminal.
2. Connect the "PR" wire from the "HI" (B) terminal on the
"FTBA" to the "H" terminal on the IDM.
3. Connect the Orange wire on the IDM to the "P" terminal on the
IDM.
Low speed setting (460V):
1. At the "FTBA", connect the "PR" wire from the IGN board to
the "LOW" (D) terminal.
2. Connect the "PR" wire from the "HI" (B) terminal on the
"FTBA" to the "P" terminal on the IDM.
3. Connect the Orange wire on the IDM to the "H" terminal on the
IDM.
