Viega Basic Heating Control Installation Manual page 33

INSTALLATION
Inspection
F-27027-5
RH
RC
FACTORY W
INSTALLED
Y
JUMPER
G
HEATING
COOLING
RELAY
Figure-5 Typical T205 Wiring to Heating/Cooling System With Dual Transformer.
RH
RC
FACTORY W
INSTALLED
Y
JUMPER
1
G
B
O
Figure-6 Typical T207 Wiring To Heating/Cooling System With Single
Transformer & Reversing Valve.
Inspect the package for damage. If damaged, notify the appropriate carrier immediately.
If undamaged, open the package and inspect the device for obvious damage.
Return damaged products.
Requirements
•
Tools (not provided)
— Writer's Note: Need list.
•
Training: Installer must be a qualified, experienced technician
•
Other accessories as appropriate
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24 VAC HEATING
1
TRANSFORMER
120 VAC
24 VAC
24 VAC COOLING
1
RELAY
TRANSFORMER
120 VAC
RELAY
FAN
1 If one of the secondary sides
of both transformers are grounded,
grounded sides must be connected
together.
24 VAC HEATING
TRANSFORMER
120 VAC
24 VAC
HEATING
RELAY
REVERSING
VALVE
COOLING
RELAY
FAN
1
RELAY
Either the B or O output
will be connected to the
reversing valve. Terminal
O supplies 24V on a call
for cooling. Terminal B
supplies 24V on a call for
heat.
5