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THERMOSTAT
[]
[]
%:
FAN COIL
CONTROL)
_G
W3
,E ,
HEAT PUMP
CONTROL
gS._ R
_--c
W2
O
I
[] i _ i C:5 y
I I I
I _ I L --I
m I........ _ _1 .......... 7 I m
I I I
FAN HUMIDIFIE i RELAY _,',
I I I
-- -11 I
11
H_AT
A95294
Fig. 24--Wiring Layout of Humidifier to Heat Pump
F_ SPDT
24VAC COIL
230VAC 15A
CES0130003
FAN RELAY G C I
DEHUMIDISTAT SPEED
(OPENS ON RISE) MOTOR
1TO!
SPEED
MOTOR
FAN COIL
THERMOSTAT CONTROL
_-_R
G
:I / BL55_ W3
C AIR COND.
' L____I
[] , ,
I I
L--4 ......
FAN HUM_
A95295
Fig. 25--Wiring Layout of Humidifier to Fan Coil with
Electric Heat
HUM 1
(c)
HUM 2
(G)
HUMIDISTAT
24-VAC TO HUMIDIFIER
HUMIDIFIER WIRING
A95296 A95317
Fig. 26--Latent Capacity Control Fig. 27--Humidifier Wiring
PROCEDURE 9--SEQUENCE OF OPERATION
A. 018-070 Fan Coil Sequence of Operation
CONTINUOUS FAN
Thermostat closes R to G. G energizes Pan relay on PCB which completes circuit to indoor blower motor. When G is de-energized, there is a 90
sec delay before relay opens.
COOLING MODE
Thermostat energizes R to G, R to Y, and R to O (heat pump only). G energizes Pan relay on PCB which completes circuit to indoor blower motor.
When G is de-energized, there is a 90 sec delay before tim relay opens.
HEAT PUMP HEATING MODE
Thermostat energizes R to G and R to Y. G energizes Pan relay on PCB which completes circuit to indoor blower motor. When G is de-energized,
there is a 90 sec delay before Pan relay opens.
HEAT PUMP HEATING WITH AUXILIARY ELECTRIC HEAT
Thermostat energizes R to G, R to Y, and R to W. G energizes fan relay on PCB which completes circuit to indoor blower motor. W energizes
electric heat relay(s) which completes circuit to heater element(s). When W is de-energized, electric heat relay(s) opens turning off heater elements.
When G is de-energized there is a 90 sec delay before Pan relay opens.
14
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