TABLE 28
OPERATING SEQUENCE
G60UHV, Thermostat with Humidity Control Feature and Two-Speed Outdoor Unit
OPERATING _-I T .......
SEQUENCE I 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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