Page 36
TABLE 28
OPERATING SEQUENCE
G60UHV, Thermostat with Humidity Control Feature and Two−Speed Outdoor Unit
OPERATING MODE
SYSTEM DEMAND
SYSTEM RESPONSE
System
Condition
Thermostat
Demand
*Relative Humidity
(Efficiency
Plus
Lights)
****Compressor
Speed
Blower CFM
(COOL)
Comments
Normal operation
Y1
No demand. Acceptable
Low
**42%/46% of
HIGH COOL
Compressor demand and indoor
blower speed controlled by
Normal operation
Y2
No demand. Acceptable
High
HIGH COOL
blower speed controlled by
thermostat demand
Y1
No demand. Acceptable
Low
**42%/46% of
HIGH COOL
Call for humidity
removal during
Y1
Humidity level rises slightly
(1) above setpoint. Demand
initiated.
Low
**42%/46% of
HIGH COOL
Dehumidification mode does not begin
until after initial thermostat demand is
removal during
1st−stage cooling
demand
Demand
satisfied
Humidity level remains
slightly (1) above setpoint.
Demand continues.
Off
Off
until after initial thermostat demand is
satisfied and new cooling demand is
initiated.
Y1
Humidity level remains
slightly (1) above setpoint.
Demand continues.
High
***65%/60% of
HIGH COOL
Significant increase in
humidity during
Y1
No demand. Acceptable
Low
**42%/46% of
HIGH COOL
If humidity rises significantly above set-
point, or if slide switch is moved signifi-
l
i
ill i
di
l
i
d
humidity during
thermostat cooling
demand.
Y1
Humidity level rises signifi-
cantly (2 or more) above
setpoint. Demand initiated.
High
***65%/60% of
HIGH COOL
point, or if slide switch is moved signifi
cantly, unit will immediately go into de-
humidification mode (in presence of
thermostat demand).
Y1
Humidity level
above setpoint.
High
***65%/60% of
HIGH COOL
When humidity demand is satisfied,
Humidity demand
satisfied during
Y1
Humidity level falls below
setpoint. No demand.
High
HIGH COOL
When humidity demand is satisfied,
blower immediately shifts to the COOL
CFM in order to hasten the end of the
cycle Unit can only shift out of high
satisfied during
thermostat demand.
None
No demand. Acceptable
Off
Off
cycle. Unit can only shift out of high
speed compressor operation at begin-
Y1
No demand. Acceptable
Low
**42%/46% of
HIGH COOL
speed compressor operation at begin
ning of next cycle.
Call for humidity
Y2
No demand. Acceptable
High
HIGH COOL
Call for humidity
removal during 2nd
stage thermostat
demand
Y2
Humidity level rises slightly
(1) above setpoint. Demand
initiated.
High
***65%/60% of
HIGH COOL
Blower immediately changes speed in
response to thermostat demand.
demand
Y2
No demand. Acceptable
High
HIGH COOL
*Call for 1st stage
cooling after call for
None
Humidity level is slightly (1)
above setpoint.
Off
Off
Dehumidification mode (high speed
compressor) begins with next thermo-
cooling after call for
humidity removal.
Y1
Humidity level is slightly (1)
above setpoint.
Low
**42%/46% of
HIGH COOL
compressor) begins with next thermo
stat demand after initial demand is sat-
isfied.
Call for 2nd stage
cooling after call for
None
Humidity level is slightly (1)
above setpoint.
Off
Off
Reduced blower speed (dehumidifica-
tion speed) begins immediately with
cooling after call for
humidity removal
Y2
Humidity level is slightly (1)
above setpoint.
High
***65%/60% of
HIGH COOL
tion speed) begins immediately with
thermostat demand
Call for cooling after
significant increase in
None
Humidity level is significantly
above setpoint (2 or more).
Off
Off
If humidity increases significantly over
setpoint, or if slide switch is moved,
unit immediately goes into dehumidifi
significant increase in
humidity
Y1 or Y2
Humidity level is significantly
above setpoint (2 or more).
High
***65%/60% of
HIGH COOL
unit immediately goes into dehumidifi-
cation mode (in presence of thermostat
demand).
Humidity demand
satisfied between
None
Humidity level is slightly (1)
above setpoint.
Off
Off
While unit is not operating (no thermo-
stat demand), slide switch is moved
down and back up Blower and com
satisfied between
thermostat demands
(unit off cycle).
Y1 or Y2
Humidity level falls below
setpoint. No demand.
High
HIGH COOL
down and back up. Blower and com-
pressor operate at high speed until
next thermostat demand.
NOTE − When changing unit mode of operation from cooling to heating, indicating lights that are on will stay on until the first ther-
mostat heating demand.
*IMPORTANT - If power to unit is turned on with thermostat calling for humidity removal, outdoor unit may be locked into high
speed indefinitely. To reset, move humidity slide switch all the way down then back up to desired setpoint (with unit running)
** Reduced blower speed is 42% of HIGH COOL for −36A and −36B units; 46% of HIGH COOL for −60C and −60D series units.
*** Reduced blower speed is 65% of HIGH COOL for −36A and −36B units; 60% of HIGH COOL for −60C and −60D series units.
****If the two−speed control on a two−speed outdoor unit is set for LATCH 2 (15 minutes) or LATCH 3 (30 minutes), the compres-
sor will latch into high speed after a Y1 demand has occurred for that period of time.
