TABLE 18
OPERATING SEQUENCE
SL280UHV, Non−Communicating Thermostat with Humidity Control Feature and Single−Speed Outdoor Unit
OPERATING |
|
|
| SYSTEM DEMAND |
|
| SYSTEM RESPONSE | |||||
SEQUENCE |
|
|
|
|
| |||||||
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Thermostat Demand |
| Relative Humidity |
| Blower |
| |||||
System |
|
|
|
|
|
|
|
|
| Compres- |
| |
Step |
|
|
| W |
|
|
|
| CFM | Comments | ||
Condition | Y1 | O | G |
|
| Status | D | sor | ||||
| 1 |
|
| (COOL) |
| |||||||
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
NO CALL FOR DEHUMIDIFICATION |
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 24 |
|
| Compressor and indoor |
Normal Operation | 1 | On | On | On |
|
|
| Acceptable | High | 100% | blower follow thermostat | |
|
|
| VAC | |||||||||
|
|
|
|
|
|
|
|
|
|
| demand | |
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
BASIC MODE (only active on a Y1 thermostat demand) |
|
|
|
|
| |||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
Normal Operation | 1 | On | On | On |
|
|
| Acceptable | 24 | High | 100% | ComfortSense® 7000 |
|
|
|
|
|
|
|
|
| VAC |
|
| thermostat energizes Y1 |
|
|
|
|
|
|
|
|
|
|
|
| |
Dehumidification | 2 | On | On | On |
|
|
| Demand | 0 | High | 70%* | and de−energizes D on a |
Call |
|
|
| VAC | call for de−humidification | |||||||
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
| |
PRECISION MODE (operates independent of a Y1 thermostat demand) |
|
|
| |||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
Normal Operation | 1 | On | On | On |
|
|
| Acceptable | 24 | High | 100% |
|
|
|
| VAC | Dehumidification mode | ||||||||
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
| begins when humidity is |
Dehumidification |
|
|
|
|
|
|
|
| 0 |
|
| |
2 | On | On | On |
|
|
| Demand | High | 70%* | greater than set point | ||
call |
|
|
| VAC | ||||||||
|
|
|
| |||||||||
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
Dehumidification |
|
|
|
|
|
|
|
| 0 |
|
| ComfortSense® 7000 |
1 | On | On | On |
|
|
| Demand | High | 70%* | thermostat will try to | ||
call ONLY |
|
|
| VAC | ||||||||
|
|
|
|
|
|
|
|
|
| maintain room humidity | ||
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| setpoint by allowing the |
| Jumpers at indoor unit with a single stage outdoor unit |
|
| |||||||||
|
|
| room space to maintain a | |||||||||
| With Condensing unit − Cut W914 (R to DS) on SureLight® control |
| ||||||||||
|
| cooler room thermostat | ||||||||||
| With Heat Pump − Cut W914 (R to DS) & W951 (R to O) on SureLight® control | |||||||||||
| setpoint** | |||||||||||
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
Dave Lennox ComfortSense® 7000 thermostat to use for this application − Y2081 4 heat / 2 cool *Dehumidification blower speed is 70% of COOL speed for all units .
**In Precision mode, ComfortSense® 7000 thermostat will maintain room temperature up to 2 °F (1.2°C) cooler than room setting.
Page 49
