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Finish:
C7189A Wall Mount Remote Indoor Sensor: Premier White®
color.
PC8900A Control Panel: Premier White® color.
W8900A-C Remote Module: Charcoal gray color.
Clock Accuracy: ± 1 minute per month.
Approvals:
FCC Class B: Pending.
NEMA DC-3: Not required.
Batteries: No batteries required. During power outages, time
is retained for six hours. All programmed setpoints and
times are retained indefinitely.
Resistance Characteristics of Sensors:
C7089A Outdoor Sensor: PTC Sensor. See Fig. 41 in the
Operation section for sensor resistance characteristics.
C7100A Discharge Air Sensor: See Fig. 41 in the Operation
section for sensor resistance characteristics.
C7189A Remote Indoor Sensor: NTC Sensor. See Fig. 41 in
the Operation section for sensor resistance characteristics.
Auxiliary Heat and Emergency Heat Indication: PC8900A
display indicates when auxiliary heat and emergency heat
are activated.
Input Ratings:
20 to 30 Vac, 50/60 Hz.
PC8900A
Comfort Center™
Control Panel
C7189A
Remote Indoor Sensor
Output Ratings:
Humidity Control Output Relay: 50 VA at 24 Vac.
Ventilation, W1, W2, Y1, Y2, E, G, O, B, AUX, Y1/W1:
Run: 40% power factor minimum.
Inrush: 50% power factor minimum.
Temperature Setting Range: PC8900A: 45° to 88°F
Humidity Setting Range:
PC8900A: 10 to 80% RH.
Cooling: 40 to 80% RH.
Heating: 10 to 80% RH.
Calibration: C7089A, C7100A, C7189A, and PC8900A are
CO
C7089A
Outdoor Sensor
CM8900A
Communication Module
Fig. 1. System components and accessories.
3
Heat Pump Failure Input (L Terminal on W8900B Models):
24 Vac load, 50/60 Hz, 0.3 VA load.
CO
Monitor Input (CO
Terminal on all W8900A-C
2
2
Models): 24 Vac load, 50/60 Hz, 0.3 VA load.
a. 1.5A running, 3.5A inrush at 200,000 cycles
(30 Vac).
b. 1.5A running, 7.5A inrush at 100,000 cycles
(30 Vac).
(7° to 31°C).
factory calibrated and require no field calibration.
Monitors: The W8900A-C allows for connection of a
2
CO
Monitor with uncommitted contacts.
2
W8735B
Telephone Access
Module
W8900A-C
Remote Module
C7100A
C7100A
Discharge Air Sensor
Discharge Air Sensor
68-0173—3
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