Friedrich ZoneAire Premier R-32 Series Service Manual page 23

TERMINAL CONNECTIONS
The wall thermostat terminal block is located behind the front panel and is easily accessible on front
of control panel.
Energy Management
Terminal Connections
Terminal Connections
Fig. 402 –Terminal Connector and Status LED Location
CAUTION
!
UNI T DAM AGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Improper wiring may damage unit electronics.
Common busing is not permitted.Damage or erratic
operation may result.
ENERGY MANAGEMENT INPUT (FRONT DESK CONTROL)
The controller can handle a switch signal from remote energy management input, called EM signal or
front desk control. Input must be 24VAC. If system receives a 24VAC signal,it will turn unit off; otherwise,
the unit runs in normal control.This function will be disabled under Freeze Guard protection. See Fig. 402
and Fig. 403 for terminal connections.
23
Auxillary Controls
LED
STATUS
Wall Thermostat
TYPICAL WALL THERMOSTAT
Fig. 403
NOTES:
1.Use terminal"O" for heat pump unit connection only.
2.Terminal"C"(common) is typically only required for digital thermostats.
TERMINAL
R
W
Y
O
GH
GL
C
NOTE: Any errant input combinations will be captured as thermostat wiring
failures and will light the STATUS LED indicator on main board
(see Intelligent Self---Checking Control section).
Energy
Management
(24VA C in)
Common
R
W
Y
O
See Note 1
GH
GL
C
See Note 2
TERMINAL BLOCK
DESIGNATION
24VAC
Electric Heat
Compressor
Reversing Valve
High Fan
Low Fan
Common