ComfortNET CTK04 - Page 5

CTK04 ComfortNet™ Communicating Thermostat
5
I/O-CHTSTAT03 69-2688—07
Install thermostat
1
Wiring Thermostat, Indoor Unit and Outdoor Unit
Wire Thermostat to Indoor Unit
Connect1,2,RandCfromthethermostatto1,2,RandCattheIndoorUnit.
Wire Outdoor Unit
Connectwires1and2fromtheIndoorUnitto1and2attheOutdoorUnit.Installthe
transformerprovidedandconnecttoRandCattheOutdoorUnit.(NOTE:installing
theadditionaltransformerisNOTrequiredforinverter/variablespeedoutdoorcom-
municatingunits.AdditionaltransformerISrequiredfor2-stageoutdoorcommunicat-
ingunits.)DoNOTconnectRandCbetweentheIndoorUnitandOutdoorUnit.See
below.
CTK04
INDOOR
BOARD TERMINAL
CONNECTIONS
R
C
1
2
24VAC (HOT)
24VAC
(COMMON)
DATA 1
DATA 2
L1
L2
24VAC
240V
OUTDOOR
BOARD TERMINAL
CONNECTIONS
OUTDOOR
TRANSFORMER
INSTALLING THE ADDITIONAL TRANSFORMER IS NOT REQUIRED FOR INVERTER/VARIABLE
SPEED OUTDOOR COMMUNICATING UNITS. ADDITIONAL TRANSFORMER IS REQUIRED FOR
2-STAGE OUTDOOR COMMUNICATING UNITS.
R
C
1
2
R
C
1
2
M33168C
1
1