Operation - Honeywell PC8900A Manual

Step
Remove jumper from T terminal.
Reconnect jumper to T terminal.
Remove jumper from T terminal.
Reconnect jumper to T terminal.
Remove jumper from T terminal.
Reconnect jumper to T terminal.
Remove jumper from T terminal.
Reconnect jumper to T terminal.
Remove jumper from T terminal.
Reconnect jumper to T terminal.
Remove jumper from T1, S and S1
terminals.
a The polarity configuration of the reversing valve relay (O/B) determines if the O/B is always energized on first call for heat or
cool. If the reversing valve energizes with heat, then it de-energizes with cooling. Factory setting is for O/B to energize with a call
for heat.
b
O/B is energized based on installer setup or configuration.
Installer Display of all Segments and Product Codes
(Optional)
1. Press and hold CHECK key until all segments of the
display are lighted. See Fig. 31.
2. Press the CHECK key four more times to view each of
the following items:
— Order specification number of the Comfort Center™
control system.
— Manufacturing date code and software revision
numbers of the Comfort Center™ control system.
— Order specification number of the remote module.
— Manufacturing date code and software revision
numbers of the remote module.
3. Press the CHECK key to return to normal operation.
SYSTEM OFF AUTO
SYSTEM
CHECK
Fig. 31. All segments on display.
68-0173—3
Table 10. Heat Pump System Checkout.
LED Terminals Energized
Off G
On
G, W1/Y1, O/B
Off
G, W1/Y1, W2, O/B
On G, W1/Y1, W2, AUX,
b
O/B
Off
G, E, O/B b
On
G, W1/Y1, O/B
Off
G, W1/Y1, Y2, O/B
On
G, W1/Y1, Y2, O/B
HUM
Off
G, W1/Y1, Y2, O/B
HUM, VNT
On None
On None
AUX HEAT SET PT COOL SET PT
FAN
AUTO
ON
CIRC
M6400
a
Result
Fan relay is energized.
b Fan and first-stage heat are energized.
Fan, first- and second-stage heat are energized.
b
Fan, first-, second- and auxiliary-stage heat are energized.
First- and second-stage heat are de-energized. Fan and
emergency heat are energized.
b Fan and first-stage cooling are energized.
Fan, first- and second-stage cooling are energized.
b
b Fan, first- and second-stage cooling with the humidifier are
,
energized.
Fan, first- and second-stage cooling with the humidifier and
b ,
VNT are energized.
All equipment is de-energized.
Returns PC8900A to normal operation.

OPERATION

The PC8900A, C7089A, C7189A, C7100A and CO
sense the temperature, humidity and CO
living space. This information is then transferred to the
W8900A-C Remote Module, which activates the proper
equipment based on the programmed settings.
Conventional vs. Adaptive Intelligent
Recovery™ Operation
Conventional Recovery
Conventional temperature recovery starts the heating or
cooling system at the programmed set time. See Fig. 32.
Using conventional recovery requires setting the program
period times earlier than the area is occupied so the area will
be comfortable. The program may need to be adjusted
periodically to accommodate for weather and seasonal
changes. The conventional recovery method is used when
Adaptive Intelligent Recovery™ operation is disabled.
70 F
60 F
SLEEP
Fig. 32. Conventional recovery ramp.
34
Equipment Operation
conditions in the
2
SETPOINT
TEMPERATURE
ACTUAL
TEMPERATURE
WAKE
monitor
2
M6404