Reznor PDF2SF Unit Installation Manual - Manual (Page 14)

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Figure 8. Comfort Alert TM Diagnostics Module
POWER LED
(Green)
TRIP LED
(Red)
ALERT LED
(Yellow)
Diagnostics
Key
Check all factory wiring to the units wiring diagram. Inspect
the factory wiring connections to be sure none loosened
during shipping or installation.
Optional Comfort Alert
TM
Diagnostics
Module
The Comfort Alert TM Diagnostics Module is a breakthrough
innovation for troubleshooting heat pump and air
conditioning system failures. The module installs easily in
the electrical box of the outdoor unit near the compressor
contactor. By monitoring and analyzing data from the
Copeland scroll compressor and the thermostat demand,
the module can accurately detect the cause of electrical
and system related failures without any sensors. A
flashing LED indicator communicates the ALERT code
and a diagnostic key is also imprinted on the side of the
module to quickly direct the technician to the root cause
of a problem. See Figure 8.
NOTE: This module does not provide safety protection!
The Comfort Alert
TM Diagnostics Module is a monitoring
device and cannot control or shut down other devices.
24 VAC Power Wiring
The Comfort Alert TM module requires a constant nominal
24 VAC power supply. The module should be powered by
an R & C that doesn’t have the potential for loss of power
due to safety controls, defrost boards, or other control
boards which could lead to nuisance alerts.
Thermostat Demand Wiring
The Comfort Alert module requires a two stage thermostat
to operate properly. The Y2 thermostat wire entering the
outdoor unit should be connected to the Y2 input on the
unit terminal strip.
While the compressor is running, Comfort Alert will provide
power to the second stage cooling solenoid inside the
compressor after Y2 has been energized for 5 seconds.
When the compressor is not running, Comfort Alert will
not power the solenoid, regardless of the state of Y2. If
Alert codes 1 or 9 appear while the compressor is running,
Comfort Alert will turn off the solenoid to prevent solenoid
damage from overheating conditions.
L Terminal Wiring
White-Rodgers Compatible Thermostats - The L
connection is used to communicate Comfort Alert codes
to compatible White-Rodgers thermostats. The L terminal
of these thermostats should be connected to the Comfort
Alert L terminal. See unit wiring diagram label included
on the unit or in these instructions for correct field wiring
connections.
NOTE: On some White-Rodgers combatible thermostats,
an icon on the thermostat display will flash at the same rate
as the Comfort Alert yellow Alert LED. An advanced option
on these thermostats is to lock out the compressor when
certain Alert codes are detected in indicating impending
compressor damage. Refer to White-Rodgers thermostat
manuals for more information.
Star Bushing
Bolt
Nut
Ambient Sensor
Plastic Clip
Nut
Figure 7. Ambient Sensor Mounting
Figure 6. Ambient Sensor Location
Standard Non-Compatible Thermostats
– The
L
connection on non-compatible type thermostats are used
for heat pump defrost control board fault monitoring. The L
terminal of these thermostats should be connected directly
to the defrost control board L terminal. See the wiring
diagram label or the heat pump installation instructions
for correct field wiring connections.
DC SOL Connection
The two pin DC SOL connector provides a connection
to the Copeland UltraTech second stage compressor