Lennox G32V Series Service Literature page 21

G32V−4 UNITS WITH CCB1, & TWO−SPEED OUTDOOR UNIT OPERATING SEQUENCE
Operating Sequence
System
Step
Condition
1
Normal operation Normal operation
2
1
Call for humidity
2
removal during 1st removal during 1st
stage thermostat
3
demand
4
1
Significant increase
in humidity during in humidity during
thermostat demand.
2
1
Humidity demand
2
satisfied during satisfied during
thermostat demand.
3
4
1
Call for humidity Call for humidity
removal during 2nd
2
stage thermostat g
demand demand
3
1
*Call for 1st stage Call for 1st stage
cooling after call for
2
humidity removal.
1
Call for 2nd stage Call for 2nd stage
cooling after call for
2
humidity removal
1
Call for cooling after
significant increase significant increase
in humidity
2
1
Humidity demand
satisfied between satisfied between
thermostat demands
2
(unit off cycle).
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 CCB1 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 77% of COOL for the V3 units; 74% of COOL for V5.
***If the two−speed control on a two−speed outdoor unit is set for LATCH 2 (15 minutes) or LATCH 3 (30 minutes), the compressor
will latch into high speed after a Y1 demand has occurred for that period of time.
System Demand
Thermostat *Relative Humidity
Demand (EfficiencyPlus Lights)
Y1 Acceptable (None)
Y2 Acceptable (None)
Y1 Acceptable (None)
Change to slightly
Y1
over setpoint (1)
Demand
Slightly over setpoint (1)
satisfied
Y1 Slightly over setpoint (1)
Y1 Acceptable (None)
Change to significantly
Y1
over setpoint (2 or more)
Y1 Over Setpoint
Change to Acceptable
Y1
(None)
None Acceptable (None)
Y1 Acceptable (None)
Y2 Acceptable (None)
Change to slightly
Y2
over setpoint (1)
Y2 Acceptable (None)
None Slightly over setpoint (1)
Y1 Slightly over setpoint (1)
None Slightly over setpoint (1)
Y2 Slightly over setpoint (1)
Significantly over setpoint
None
(2 or more)
Significantly over
Y1 or Y2
setpoint (2 or more
None Over setpoint (1 or more)
Change to
Y1 or Y2
acceptable (None)
TABLE 14
***Compressor
Speed
Low
High
Low
Low
Off
**77%/74% of
High
Low
**77%/74% of
High
**77%/74% of
High
High
Off
Low
High
**77%/74% of
High
High
Off
Low
Off
**77%/74% of
High
Off
**77%/74% of
High
Off
High
Page 21
System Response
Blower CFM
Comments
(COOL)
55% of
Compressor demand and indoor
HIGH COOL
blower speed follow thermostat blower speed follow thermostat
HIGH COOL
55% of
HIGH COOL
55% of
HIGH COOL Dehumidification mode begins with
next thermostat demand, after initial next thermostat demand after initial
thermostat demand is satisfied.
Off
HIGH COOL
If humidity increases significantly
55% of
over setpoint, or if slide switch is
HIGH COOL
moved significantly unit will immedi- moved significantly, unit will immedi-
ately go into dehumidification mode
HIGH COOL
(in presence of thermostat demand).
HIGH COOL
When humidity demand is satisfied, When humidity demand is satisfied,
blower immediately shifts to the
HIGH COOL
HIGH COOL CFM in order to hasten
the end of the cycle. Unit can only
the end of the cycle Unit can only
Off
shift out of high speed compressor g
operation at beginning of next cycle. ti t b
55% of
HIGH COOL
HIGH COOL
Blower immediately changes speed
HIGH COOL
in response to thermostat demand.
HIGH COOL
Off Dehumidification mode (high speed
compressor) begins with next ther- compressor) begins with next ther
55% of
mostat demand after initial demand is
HIGH COOL
satisfied.
Off
Reduced blower speed (dehumidifi- Reduced blower speed (dehumidifi-
cation speed) begins immediately
with thermostat demand
HIGH COOL
If humidity increases significantly
Off
over setpoint, or if slide switch is
moved unit immediately goes into moved, unit immediately goes into
dehumidification mode (in presence
HIGH COOL
of thermostat demand).
While unit is not operating (no ther-
Off
mostat demand), slide switch is mostat demand), slide switch is
moved down and back up. Blower
HIGH COOL and compressor operate at high
speed until next thermostat demand.
demand
p p
i i f t l