Coolerado M50C - Appendix 5: Multiple Unit Control Wiring

Coolerado Installation
Page 30 of 63
Appendix 5: Multiple Unit Control Wiring
Note that if power is lost to first unit then the remaining units will not have a cool call signal and the supply fans in those
units will shut off automatically.
CLG To
AV Fan 2-10 V
Com
AV Fan 1-10 V
Y-24 VAC IN
RC- 24 VAC OUT
Winter /Summer
24 VAC
Freeze Protect
24 VAC
Com
Y R Br Bk Bl W Or G
Com
AV Fan 1-10 V
Y-24 VAC IN
RC- 24 VAC OUT
Winter /Summer
24 VAC
Freeze Protect
24 VAC
Com
Y R Br Bk Bl W Or G
FAN To
Y-24
VAC IN
24V To
RC-24 VAC
OUT
COM
To
COM
First Unit Control Terminal Strip Additional Unit Control Terminal Strip
Multiple Unit
Control Wiring
• Thermostat, The red Wire RC– 24 VAC
OUT provides power to thermostat. Do
not connect to additional units or it may
blow fuse.
• Winter /Summer, contact switch; power
from first unit will power rest of units.
• Freeze Protection, only one unit needs
to be attached to solenoid valves.
AV Fan, Optional
Winter/Summer Dry Contact
Switch from Building Automation
Control, Optional.
Johnson
Control
Thermostat