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SLP99UH
Model
All Models
SLP99UH Model
All Models
OPERATING SEQUENCE
System
Step
Condition
NO CALL FOR DEHUMIDIFICATION
Normal Operation
1
BASIC MODE (only active on a Y1 thermostat demand)
Normal Operation
1
Dehumidification
2
call
PRECISION MODE (operates independent of a Y1 demand)
Normal Operation
1
Dehumidification
2
Call
Dehumidification
1
Call Only
On-board links at indoor unit with a single-stage outdoor unit:
With Condensing unit - Cut W914 (R to DS) on SureLight® control;
With Heat Pump - Cut W914 (R to DS) & W951 (R to O)on SureLight® control.
*ComfortSense
7500 thermostat only
®
Allowable Heating Speeds
-15%
-7.5%
Allowed
Allowed
TABLE 25
Allowable Circulation Speeds
28%
(Second Stage Cool)
Allowed
COOLING OPERATING SEQUENCE
SLP99UHV and Single-Stage Outdoor Unit
SYSTEM DEMAND
Thermostat Demand
1st
O
G
stage
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
TABLE 24
Default
Factory
38%
(second stage cool)
Factory Setting
TABLE 26
SYSTEM RESPONSE
Relative Humidity
Compressor
Status
D*
24
Acceptable
High
VAC
24
Acceptable
High
VAC
Demand
0 VAC
High
24
Acceptable
High
VAC
Demand
0 VAC
High
Demand
0 VAC
High
Page 49
+7.5%
+15%
Allowed
Allowed
Blower
CFM
Comments
(cool)
Compressor and indoor
100%
blower follow thermostat
demand
100%
Thermostat energizes Y1
and de-energizes D on a
call for de-humidification
70%
100%
Dehumidification mode
begins when humidity is
greater than set point
70%
70%
Thermostat will keep
outdoor unit energized after
cooling temperature setpoint
has been reached in order
to maintain room humidity
setpoint.
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