Install Instructions

BOILER
COLD
WATER
SUPPLY
UNION
(TYPICAL)
FLOW
CHECK
EXPANSION
TANK
DIR #2000534677 00
HC
M
ASSE 1070
ANTI-SCALD
MIXING VALVE
(REQUIRED)
TEMPERATURE /
PRESSURE GAUGE
FLOW
CONTROL
VALVE
RECIRCULATION
PUMP
A
QUASTAT
PRESSURE
RELIEF VALVE
(REQUIRED,
FIELD SUPPLIED)
HOT WATER
FIXTURES
48
6B Domestic water piping (Combi Only)
Figure 6-12 DHW Recirculation w/Dedicated Return
Please note that these illustrations are meant to show system piping concept only, the installer is
responsible for all equipment and detailing required by local codes.
NOTICE
Installation & Service Manual
To prevent scalding from DHW recirculation temperature creep, a suitable method to stop recirculation
flow once water in the loop has reached the desired temperature must be used. Failure to stop water
flow once the desired DHW temperature has been reached can result in serious injury or death due to
scalding.
Hydronic piping omitted for clarity.
NOTICE
Note: Aquastat for DHW
recirculation pump or thermostatic
shut off valve must be used to
stop recirculation water fl ow once
the desired temperature has been
reached.
For best performance, Pre-Heat
Mode should be enabled when
using DHW recirculation.
FIRE TUBE
™
An ASSE 1070 anti-scald mixing valve is REQUIRED. Failure to comply could result in property
damage, severe injury, or death.
⚠WARNING
⚠WARNING