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Installation Instructions
10 Electrical Wiring
Field wiring must comply with the National Electric Code (NEC) and any
applicable local ordinance.
WARNING: ELECTRICAL SHOCK
Disconnect all power to unit before installing or
servicing. More than one disconnect switch may be
required to de-energize the equipment. Hazardous
voltage can cause severe personal injury or death.
10.1 Power Wiring
1.
It is important that proper electrical power is available for
connection to the unit being installed. See the unit nameplate,
wiring diagram, and electrical data in the installation instructions for
more detailed requirements. Voltage tolerance should not be over
10% from rating voltage.
2.
If any of the wiring must be replaced, replacement wiring must be
the same type as shown in nameplate, wiring diagram and electrical
data sheet.
3.
Install a branch circuit disconnect of adequate size to handle
starting current, located within sight, and readily accessible to the
unit.
E lectric Heater: If the optional Electric Heat Kit is installed, the unit
4.
should be equipped with suitable circuit breakers or fuse. Refer to
Table 11 and 12 for more information. These breaker(s) protect
the internal wiring in the event of a short circuit and serve as a
disconnect. Circuit breakers installed within the unit do not provide
over-current protection of the supply wiring and therefore may be
sized larger than the branch circuit protection.
Supply circuit power wiring must be 221 °F minimum
copper conductors only. Refer to Table 12 and 13 for
ampacity, wire size and circuit protector requirements.
Supply circuit protective devices may be either fuses or
"HACR" type circuit breakers.1-3/8" knockouts inside the
cabinet are provided for connection of power wiring to
electric heater.
Power wiring is connected to the power terminal block in
unit electric cabinet. See Electric Heater Kit Installation
Instructions for details.
5.
See wiring diagram located on inside of control board access panel
for proper wiring instructions.
10.2 Grounding
WARNING: ELECTRICAL SHOCK
The unit must be permanently grounded. Failure to
do so can result in electrical shock causing personal
injury or death.
The unit must be electrically grounded in accordance with local
codes and the National Electric Code (NEC).
Grounding may be accomplished by attaching ground wire(s) to
ground lug(s) provided in the unit wiring compartment.
2 0 |
10.3 Control Wiring
WARNING: FIRE HAZARD
18 AWG. color-coded low voltage wire should be used for
lengths less than 50 ft. For wire lengths longer than 50 ft., 16
AWG. wire should be used.
7/8" knockout hole should be used to route control wires into
the unit.
After installation, ensure separation of low voltage and high
voltage wiring is maintained.
Refer to Figure 18 for thermostat wiring diagrams.
High voltage power supply
Figure 17
Bosch 15 SEER2 Inverter Ducted Packaged Heat Pump - BTC 761701319 A (12.2022)
Low voltage control wiring should not be run in
conduit with high voltage wiring. Keep distance
between the two conduits per local codes.
Control wiring
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