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Installation and Operating Instructions
When making the electrical connections, always make sure:
•
The electrical supply has the proper overload fuse or breaker protection
•
Wire sizes and connections comply with all applicable codes
•
Wiring is enclosed in approved conduit (if required by local codes)
•
The water heater and electrical supply are properly grounded
To connect wiring:
1.
Provide a separate disconnect switch for the water heater.
2.
Open knockout to gain path for wires into the power supply box.
3.
Open the power supply box.
4.
Optional: Remove CTA 2045 port cover and remove connector to gain
better access to terminal block.
5.
Pull wires through the knockout and connect wires to the terminal block.
6.
Properly ground the unit.
7.
Close all covers.
WARNING
Shock hazard!
•
Check wire tightness from and to power supply terminal block.
Ground
Screw
Terminal
Block
Wiring connection
Figure 5
White
Black
L1
208VAC 60Hz
240VAC 60Hz
Figure 6
14 |
Power Supply
Cover
Conduit
Connector
Yellow
L2
Bosch GreenTronic 7000 T Hybrid Electric Water Heater - BTC 755003301 A (03.2024)
5.5 Ducting
If ducting is installed, make sure to adjust F40 setting to 1. See chapter Advanced
Settings for more details.
Check chapter on Air Flow Requirements if ducting is necessary. Ducting is an
option to ensure enough air flow. Before designing the duct system, always check
with local building and HVAC codes. Read these instructions carefully for ducting
unit to outdoors or other spaces. Any ducting configurations that do not comply
with these instructions are not supported.
This water heater must be ducted separately from other appliances. Only use
ducting approved for HVAC applications. Ensure ducting is adequately supported
and that UL Certified terminations are used.
HVAC approved indoor registers are required. To minimize transmission of
vibration or noise, rigid ducting must be isolated from floor joists or other structural
members. Utilize a short section (12" or larger) of flexible duct between the water
heater and rigid ducting as an isolation method. Every foot of flexible ducting
counts as three feet of rigid ducting. Ducting must be insulated per HVAC codes and
to prevent condensation.
Cold air exhaust must be sufficiently away from structures to prevent condensation
on surfaces. Increasing resistance to airflow and regular filter maintenance will
maximize heater performance. Providing unit with warm moist air is beneficial to
the performance of the water heater.
Considerations when planning the duct system:
•
Use direct route for running the ducting. To maximize airflow, reduce
elbows/bends used in layout as much as possible
•
Utilize largest duct size possible
•
The total length of duct is the length on the inlet plus the length on the
outlet
•
Inlet and outlet ducting do not have to be the same length.
•
Elbows, bends and termination decrease total allowable ducting length.
See Table 13
Duct Type /
8"
Diameter
Rigid
357 ft (109 m)
168 ft (51 m)
Flexible
131 ft (40 m)
68 ft (21 m)
Maximum total equivalent duct length
Table 12
7"
6"
5"
68 ft (21 m)
18 ft (5.5 m)
26 ft (7.9 m)
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