INSTALLATION AND OPERATION INSTRUCTIONS
18
BT INDIRECT SERIES – WATER HEATERS
NOTE
When using zone valves in a
multi-zone heating system,
careful consideration must
be taken to ensure that flow
rates do not decrease below
the boiler’s rated minimum
flow requirement. Bypass
arrangements (pressure
activated bypass, three way
valves, etc.) may be required
to ensure adequate flow
under low load conditions.
BT Series Indirect
Hot Water Tank
120VAC
(HOT) (COM)
Heating circ.
AC in
Primary
Pump
Boiler
Pump
yellow
L
N
L
N
white
white
black
DHW circ.
Factory-installed
Ganged endswitches from
Heating zone valves
Aquastat -dry contact
G
Fie
ld
-w
irin
g
Bundl
e
Select one:
either
a dry-contact
Aquastat to a
Therm
. connection
or
a 10K Ohm thermister to the
DHW Sensor
connection.
Figure 4: Piping Suggestion for IBC SL Series Small Boilers with Side Connections
Figure 5: Wiring Suggestion for IBC Boilers
