Carrier CRHEATER101A00 Installation Instructions Manual page 19

NOTE: Only CRHEATER301A00 is shown in the figure.
CRHEATER128B00-129B00 has only one bank of heaters with a wide
mounting plate covering both slots.
Fig. 20 — Installing CRHEATER301A00 and CHEATER128B00-129B00, 360A00-364A00, 371A00-373A00, 380A00
CTB
CONTROL
BOARD
2
VIO
3 ORN
12 BRN
ORN
1
TB4
VIO
Field
Connections
Fig. 21 — Accessory Electric Heater Control
Connections (AC-1 Except Size 16 and 180, AC-2
Except Size 14 and 150)
Control Box
(Ref)
Grommet
Disconnect
VIO BRN
2 3
VIO BRN BRN
Elec Htr
VIO BRN
HR2
VIO HR1 BRN
HR1: On Heater 1 in Position #1
HR2: On Heater 2 in Position #2
(if installed)
Route Heater Wires
Through Grommet
Screw (8)
LCTB
CONTROL
BOARD
2
3 ORN
12
BRN
TB4
Field
Connections
For simplicity, not all control wiring internal
to the electric heaters is shown.
Fig. 22 — Accessory Electric Heater Control
Connections (AC-1 Size 08-14, AC-2 Size 08-12)
(CRHEATER128B00, 129B00 only)
19
Screw (2)
Heater Cover
VIO
VIO BRN
ORN
2
3
1
VIO BRN
ORN
Elec Htr
VIO HR3
LS
ORN BRN
HR1
LS: Primary Limit Switch