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Installation Instructions
4 Electrical wiring
Field wiring must comply with the National Electric Code (C.E.C. in Canada) and
any applicable local ordinances.
WARNING: ELECTRICAL SHOCK
Disconnect all power to unit before installing or servicing.
More than one disconnect switch may be required to
deenergize the equipment. Hazardous voltage can cause
severe personal injury or death.
4.1 Power Wiring
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.
If required, install a branch circuit disconnect of adequate size, located
within sight, and readily accessible from the unit.
When the Electric Heater is installed, units may be equipped with one or
two 30-60 amp. circuit breakers. 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. See Electrical Data In this section for ampacity, wire size and circuit
protector requirements. Supply circuit protection devices may be either
fuses or "HACR" type circuit breakers.
High voltage wiring may be run through knockout holes on the right, left
or top of the unit.
Three 7/8", 1-3/8", 1-3/4" dia. concentric knockouts are provided for
running high voltage wiring to the unit.
High voltage wiring must be connected to the red and black wiring in the
control section of the air handler.
4.2 Control Wiring
Low voltage control wiring should not be run in conduit with high voltage
wiring. Keep distance between the two conduits per local codes.
18 AWG. color-coded low voltage wire should be used for lengths less
than 100ft. For wire lengths longer than 100 ft., 16 AWG. wire should
be used.
For low voltage wire connection location, see Figure 8.
Bosch Thermotechnology Corp. | 02.2019
See wiring diagram located on inside of blower access panel of air
handler for proper wiring instruction.
After installation, ensure separation of low voltage and high voltage
wiring is maintained.
4.3 Grounding
DANGER: ELECTRICAL SHOCK
The unit must be permanently grounded. Failure to do so can
result in electrical shock causing personal injury or death.
The ground may consist of electrical wire or metal conduit when installed
in accordance with existing electrical codes.
Grounding may also be accomplished by attaching ground wire(s) to
ground lug provided in the unit wiring compartment.
Use of multiple supply circuits require grounding of each circuit to lug
provided in unit.
Ground lug is located on the upper right side of the cabinet.
4.4 Electrical Data
Model
Voltage
Hertz
24
208/230
60
36
208/230
60
48
208/230
60
60
208/230
60
Table 4
Bosch IDS BVA 2.0 | 13
Maximum
Circuit
HP
Speeds
Circuit
Amps
Protector
1/3
5
2.6
15(A)
1/2
5
3.0
15(A)
3/4
5
4.5
15(A)
3/4
5
4.5
15(A)
Data subject to change
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