23
Low Voltage Control Connections
Run the low-voltage control leads from the heater module(s)
— VIO and BRN (two of each if two modules are installed;
identify for Module #1) — to the 4-pole terminal board TB4
located on the heater bulkhead to the left of Heater #1. Connect
the VIO leads from Heater #1 and Heater #2 to terminal
TB4-1. Connect the BRN leads to terminal TB4-3. See Fig. 36.
Fig. 36 — Accessory Electric Heater Control
Connections
CONTROL AND POWER WIRING DIAGRAMS
Figures 37-44 are typical control and power wiring diagrams.
DEFROST
BOARD
ORN
BRN
Field
Connections
E-HEAT
P3-3
31
ORN BRN
VIO BRN BRN
VIO
TB4
VIO HR2
HR1
BRN
VIO BRN
Elec Htr
HR1: On Heater 1 in Position #1
HR2: On Heater 2 in Position #2 (if installed)
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