
SSA-SVX06B-EN
45
Installation
Thermostat and Control Connections for Electromechanical Controls
Wiring shown with dashed lines is to be furnished and installed by the customer. All customer-
supplied wiring must be copper only and must conform to NEC and local electrical codes. Codes
may require line of sight between disconnect switch and unit.
1.
Observe all notes on the wiring diagrams.
2. Mount the thermostat in the desired location.
3. Install color coded low voltage cables between outdoor unit, indoor unit and thermostat.
4. Connect low voltage control wiring to the low voltage terminal board located at the control box
per the typical interconnecting wiring diagrams.
Note:
When electric heater accessory is used, single point power entry or dual point power entry
is field optional. Single point power entry option is through electric heater only.
Field Wiring:
A. 3 power wires. Line voltage for 3 phase (2 wires for single phase)
B. 3 power wires. Line voltage for 3 phase (2 wires for single phase)
C.
Cooling only thermostat
: 3 to 7 wires depending on stages of electric heat
D. 3 to 7 wires depending on type of outdoor unit(s)
WARNING
Proper Field Wiring and Grounding Required!
All field wiring MUST be performed by qualified personnel. Improperly installed and grounded
field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST
follow requirements for field wiring installation and grounding as described in NEC and your
local/state electrical codes. Failure to follow code could result in death or serious injury.
Figure 20. Thermostat and Control Connections — Electromechanical Controls