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TABLE 13
CBX32MV, SignatureStat or ComfortSense 7000 and TWO STAGE OUTDOOR UNIT
OPERATING
SEQUENCE
SYSTEM DEMAND
SYSTEM RESPONSE
System
Condition
Step
Thermostat Demand
Relative Humidity
Compressor
Blower
CFM
(COOL)
Comments
Y1
Y2
O
G
W
1
W
2
Status
D
NO CALL FOR DEHUMIDIFICATION
Normal Operation −
Y1
1
On
On
On
Acceptable
24
VAC
Low
70%
Compressor and indoor
blower follow thermostat
demand
Normal Operation −
Y2
2
On
On
On
On
Acceptable
24
VAC
High
100%
ROOM THERMOSTAT CALLS FOR FIRST STAGE COOLING
BASIC MODE (only active on a Y1 thermostat demand)
Normal Operation
1
On
On
On
Acceptable
24
VAC
Low
70%
SignatureStat energizes
Y2 and de−energizes D on
a call for dehumidification
Dehumidification
Call
2
On
On
On
On
Demand
24
VAC
High
60%/65%
70%*
PRECISION MODE (operates independent of a Y1 thermostat demand)
Normal Operation
1
On
On
On
Acceptable
24
VAC
Low
70%
Dehumidification mode be-
gins when humidity is
greater than set point
Dehumidification
call
2
On
On
On
On
Demand
0
VAC
High
60%/65%
70%*
Dehumidification
call ONLY
1
On
On
On
On
Demand
0
VAC
High
60%/65%
70%*
SignatureStat will try to
maintain room humidity
setpoint by allowing the
room space to maintain a
cooler room thermostat
setpoint**
ROOM THERMOSTAT CALLS FOR FIRST AND SECOND STAGE COOLING
BASIC MODE (only active on a Y1 thermostat demand)
Normal Operation
1
On
On
On
On
Acceptable
24
VAC
High
100%
SignatureStat energizes
Y2 and de−energizes D on
a call for dehumidification
Dehumidification
Call
2
On
On
On
On
Demand
0
VAC
High
60%/65%
70%*
PRECISION MODE (operates independent of a Y1 thermostat demand)
Normal Operation
1
On
On
On
On
Acceptable
24
VAC
High
100%
Dehumidification mode be-
gins when humidity is
greater than set point
Dehumidification
call
2
On
On
On
On
Demand
0
VAC
High
60%/65%
70%*
Dehumidification
call ONLY
1
On
On
On
On
Demand
0
VAC
High
60%/65%
70%*
SignatureStat will try to
maintain room humidity
setpoint by allowing the
room space to maintain a
cooler room thermostat
setpoint**
Jumpers at indoor unit with a two stage outdoor unit
With Condensing unit − Y2 and R to O
With Heat Pump − none
*During dehumidification, cooling blower speed is as follows: 70% of COOL cfm for 018/024, 024/030 & 068 65% for 036,
60% for 048 & 060 units.
** In Precision mode, Signature thermostat built BEFORE October 2003 will maintain the room temperature up to 3°F (1.8°C)
cooler than room thermostat setting. Precision thermostats built AFTER October 2003 will maintain the room temperature up
to 2°F (1.2°C) cooler than the room thermostat setting.
