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4. Installation Walkthrough
4.5. Wiring
4.5.3. Explanation of Terminal Block 3
A:
Signal
output
to
Auxiliary
Heater (AH),which
will
be
used
as
auxiliary
heating
source
for
both
heating
and
DHW
operation.
B:
Signal
output
to
Hot
Water
Tank
Backup
Heater (HWTBH),
which
will
be
used
as
backup
heating
source
for
DHW
operation
only.
C
Signal
output
to
Heating
Backup
Heater (hbh), which
will
be
used
as
backup
heating
source
for
Heating
operation
only.
D
way
motorized
valve
diverting
the
water.
:
:
3-
Application Side
A
B
C
D