Electrical Connections For Indoor And Outdoor Units - Williamson-Thermoflo 9SRA-HE Installation & Service Manual

ELECTRICAL CONNECTIONS FOR INDOOR AND OUTDOOR UNITS

INDOOR UNIT
1. The indoor unit is powered from the outdoor unit. A sufficient length of conduit and wiring shall be used from the
outdoor unit to the indoor unit.
2. To access the terminal block inside the indoor unit, remove the screw on the cover plate. (See Fig. A.)
3. Connect the inter unit conductors to terminals marked 1,2,3,
terminals from the outdoor unit. (See Fig.B.)
Figure A
Cover plate
OUTDOOR UNIT
1. Two conduit connection openings are provided on the outdoor unit: one for incoming power supply and the second one for
the inter unit wiring.
2. Remove the terminal box cover to access the terminal block.
3. Connect the power supply conductors to terminal marked L1, N or L1, L2, and the grounding wire to terminal
marked .
4. Connect the inter unit conductors to terminals marked
9SRA-HE | 12SRA-HE | 15SRA-HE (115V - 60Hz)
Incoming power supply
Terminal block
Conduit
Conduit
connectors
To indoor unit
on the indoor unit corresponding to the same numbered
Terminal block of indoor unit
, 3, 2, 1.
18SRA-HE | 24SRA-HE (208-230V - 60Hz)
Incoming power supply
Installation & service manual _8
Figure B
Conduit
Conduit
connectors
To indoor unit