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TABLE 28
OPERATING SEQUENCE
G60UHV, Thermostat with Humidity Control Feature and Two-Speed Outdoor Unit
OPERATING
_-I
T
.......
SYS EM DEMAND
S¥S EM RESPONSE
Thermostat
Demand
Relative Humidity
System
Ste
Condition
P
ww
I
1
Status
D
NO CALL FOR DEHUMIDIFICATION
Compressor
Blower
CFM
(COOL)
Comments
Normal Operation -
24
Y1
1
On
On
On
Acceptable
VAC
Normal Operation -
24
Y2
2
On
On
On
On
Acceptable
VAC
Low
High
70%
100%
Compressor and indoor
blower follow thermostat
demand
ROOM THERMOSTAT
CALLS FOR FIRST STAGE COl)LING
BASIC MODE (only active on a Y1 thermostat demand)
Normal Operation
1
On
On
On
Dehumidification
Call
2
On
On
On
On
24
Acceptable
VAC
0
Demand
VAC
Low
High
70%
70%
SignatureStat T" thermo-
stat energizes Y2 and de-
energizes D on a call for
de-humidification
PRECISION MODE (operates independent
of a Y1 thermostat demand)
24
Normal Operation
1
On
On
On
Acceptable
VAC
Dehumidification
0
2
On
On
On
On
Demand
call
VAC
Dehumidification
0
call ONLY
1
On
On
On
On
Demand
VAC
ROOM THERMOSTAT
CALLS FOR FIRST AND SECOND STAGE COOLING
BASIC MODE (only active on a Y1 thermostat demand)
24
Normal Operation
1
On
On
On
On
Acceptable
VAC
Dehumidification
0
2
On
On
On
On
Demand
Call
VAC
Low
High
High
High
High
70%
70%
70%
10o%
7o%
Dehumidification
mode
begins when humidity is
greater than set point
SignatureStat
T_ thermo-
stat will try to maintain
room humidity
setpoint
by
allowing
the room space
to maintain
a temperature
that is cooler
than the
room thermostat
setpoint*
SignatureStat T" thermo-
stat energizes Y2 and de-
energizes D on a call for
de-humidification
PRECISION MODE (operates independent
of a Y1 thermostat demand)
Normal Operation
1
On
On
On
Acceptable
Dehumidification
2
On
On
On
On
Demand
call
Dehumidification
call ONLY
1
On
On
On
On
Demand
24
VAC
Low
0
VAC
High
0
VAC
High
70%
70%
70%
Jumpers at indoor unit with a two stage outdoor unit
Cut factory jumper from Y1 to Y2 or cut W915 (Y1 to Y2)
With Condensing unit - Cut W914 (R to DS) on SureLight board
With Heat Pump - Cut W914 (R to DS) & W951 (R to O) on SureLight board
Dehumidification
mode
begins when humidity is
greater than set point
SignatureStat
T_ thermo-
stat will try to maintain
room humidity
setpoint
by
allowing
the room space
to maintain
a temperature
that is cooler
than the
room thermostat
setpoint*
Thermostat used: 51M27 -- 2 heat/2
cool or 51M28 -- 2 heat/2
cool for heat pumps
*In Precision mode, SignatureStat "thermostat
will allow room temperature up to 2 °F (1.2°C) coolerthan room temperature
setting in order to meet humidity control demand.
Page 36
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