Page 57
XP21
XC21 iComfort™ Outdoor Unit
Wiring Detail with Utility Load Shedding - Preferred and Only Wiring Method
0
Field-Provided Relay -
Part Number 69J79
(silver-gold diffused
contacts)
Utility Load Control Receiver
Contacts (N.C. contacts shown,
verify contact configuration)
5
2
A
B
7
(c)
(NO)
(NC)
Outdoor Control Part Number
103369-03
Figure 29. Preferred Method - Outdoor Control - 103369-03
NON- PREFERRED WIRING (OUTDOOR CONTROLS -
103369-01 AND 103369-02 ONLY)
1. Utility Load Shedding Mode ACTIVATED (Utility
Cycled Unit OFF) – The normally closed set of con
tacts in the utility load control receiver open. This
interrupts the 24VAC signal from the Y1 Out terminal
on the outdoor control to the compressor contactor coil
and the compressor will be cycled OFF. The outdoor
fan will continue to operate during a thermostat de
mand. The 7‐segment display on the outdoor control
will NOT display an alert code and the iComfort WiFi
®
thermostat will NOT display an alert. The customer will
not be notified by email when the load shedding mode
is activated by the utility company.
Note Some utilities may require the entire outdoor
unit to cycle off during utility load shedding. If the entire
outdoor unit is required to cycle off, the "preferred wir
ing method" shown in figure 29 must be used.
2. Utility Load Shedding Mode DEACTIVATED (Nor
mal Equipment Operation) – When load shedding is
not required, the contacts in the utility load control re
ceiver are closed. The circuit is completed between the
Y1 Out terminal on the outdoor control to the com
pressor contactor coil. The outdoor unit will return to
normal operation.
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