Control Panel Layout; Field Connections - Bradford White OmniTech BONH1250 Installation And Operation Instructions Manual
Category ii and iv venting with touchscreen controls
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7.D Control Panel Layout
Figure 12.
Control Panel Layout and Components
7.E
Field Connections
Wiring for all field connections must be run through the available electrical
conduit to the back of the unit. See Figure 11.
When running the field connection wiring between the units in a cascading
installation, always exit and enter the unit through the lower back panels
so that during future servicing, the wires do not have to be disconnected in
order to remove the top and side panels.
It is up to the electrician to install all power and system wiring
as per codes and best practices.
GND
120N
120N
120N
120L
120L
120L
24N
24N
24N
24V
24V
24V
BOILER PUMP (N) 17
BOILER PUMP (L) 18
DHW PUMP
DHW PUMP
SYSTEM PUMP
SYSTEM PUMP
SPARE 1
SPARE 1
SPARE 2
SPARE 2
ALARM BELL
ALARM BELL
SYSTEM SUPPLY
SYSTEM SUPPLY
SYSTEM RETURN
SYSTEM RETURN
DHW
DHW
OUTDOOR
OUTDOOR
CH1/DHW1
CH1/DHW1
CH2/DHW2
CH2/DHW2
DHW/DHW3
DHW/DHW3
SPARE 1
SPARE 1
SPARE 2
SPARE 2
BAS 0-10VDC
BAS 0-10VDC
PUMP 0-10VDC
PUMP 0-10VDC
RUN - C
RUN - N.C.
RUN - N.O.
ALARM - C
ALARM - N.C.
ALARM - N.O.
CASCADE - B
CASCADE - A
CASCADE - GND
BMS - B
BMS - A
BMS - GND
Figure 13.
Field Connections
(on Terminal Block 1)
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