Technical Bulletin
When using the ControlAir 15 relay contacts to initiate blower operation on a furnace, certain thermostats will initiate the outdoor cooling condenser when R and G are closed.
Use this wiring configuration to stop the ControlAir15 relay contacts from initializing the condenser unit. This problem can occur at the thermostat because the Y terminal is connected to the G terminal internal to the stat. When R and G are closed at the fur- nace (by dehumidistat or relay) 24 Volts is sent to G at thermostat. 24 Volts is then sent through Y which will initiate outdoor condenser.
MICRO PROCESSOR BOARD
|
| TO DISABLE |
|
|
|
|
| P4 |
|
|
|
|
|
|
|
|
|
|
| THERMIST0R | |||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||
RECIRCULATION |
|
|
|
|
| P2 |
|
|
|
|
|
|
|
|
| INTERNAL |
| ||||||||||
|
| REMOVE SEL2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||||
|
|
|
|
|
|
| SEL2 |
|
|
|
|
|
|
| DEHUMIDISTAT |
| |||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||||||||||||
|
| REMOVE SEL1 |
|
|
|
|
|
|
|
| P5 |
|
|
|
|
|
|
|
|
|
|
| |||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||||
|
|
| FOR |
| SEL1 |
|
|
|
|
|
|
|
|
|
|
|
|
| |||||||||
|
|
|
|
|
|
|
|
|
| T1 | N/C | ||||||||||||||||
|
|
|
|
|
|
| DRY |
|
|
|
|
|
| ||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
| T2 | COMMON | |||||||||||||
|
|
|
|
|
| CONTACT |
|
|
|
|
|
| |||||||||||||||
WARNING |
|
|
|
|
|
|
|
|
|
| T6 | N/O | |||||||||||||||
|
|
|
|
|
|
|
|
|
| ||||||||||||||||||
| P1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||||||||||
750 ma |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||||||||
MAX FUSE |
| LINE |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| T7 |
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| T8 |
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
| CHASSIS |
|
|
| T15 |
|
|
|
|
|
|
|
|
| |||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
| P3 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
|
| P6 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||||||
1 |
|
| NEUTRAL |
|
|
|
|
|
|
| T9 |
|
|
|
|
|
|
|
|
| |||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||||||||
|
|
|
|
| GROUND |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||
2 |
|
|
|
|
|
|
|
|
|
|
|
|
| T10 |
|
|
|
|
|
|
|
|
| ||||
T5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| T11 |
|
|
|
|
|
|
|
|
| ||
T4 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| T12 |
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
T3 |
|
|
|
|
|
| FAN O/P |
|
|
| T13 |
|
|
|
|
|
|
|
|
| |||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| T14 |
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
CONTROLAIR 15
YEL
GRN 
ORN 
RED 
BLK 
LEGEND
HIGH VOLTAGE
12V LOW VOLTAGE
FIELD INSTALLED LOW VOLTAGE
R G W Y
Thermostat
R G W Y C
Furnace
30
