Allied A80US2V - Page 17

508155-01 Issue 2108 Page 17 of 49
Operating Sequence System Demand System Response
System
Condition
Step
Thermostat Demand Relative Humidity
Compressor
Blower
CFM
(COOL)
Comments
Y1 O G W1 W2 Status D
NO CALL FOR DEHUMIDIFICATION
Normal Operation 1 On On On Acceptable 24 VAC High 100%
Compressor and indoor
blower follow thermostat
demand
BASIC MODE (only active on a Y1 thermostat demand)
Normal Operation 1 On On On Acceptable 24 VAC High 100%
Thermostat energizes Y1 and
de-energizes O on a call for
de-humidication
Dehumidication
Call
2 On On On Demand 0 VAC High 70%*
PRECISION MODE (operates independent of a Y1 thermostat demand)
Normal Operation 1 On On On Acceptable 24 VAC High 100%
Dehumidication mode begins
when humidity is greater than
set point
Dehumidication
Call
2 On On On Demand 0 VAC High 70%*
Dehumidication
Call ONLY
1 On On On Demand 0 VAC High 70%*
Thermostat 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 single stage outdoor unit
• With Condensing unit - Cut W914 (R to OS) on control
• With Heat Pump - Cut W914 (R to DS) and W951 (R to O) on control
* Dehumidication blower speed is 70% of COOL speed for all units.
** In Precision mode, thermostat will maintain room temperature up to 2°F (1.2°C) cooler than room setting.
Table 11. A80US2V, Non-Communicating Thermostat with Humidity Control Feature and Single-Speed Outdoor
Unit