39110331-01 - 5/20
PHTM II
Installation, Operating & Service Instructions
NOTICE: Heating System piping omitted for clarity.
NOTICE: Installer is responsible for piping configurations to provide proper flow rates and
meet local codes.
DANGER
Scald hazard. Under certain conditions this boiler can deliver (DHW) at temperatures
in excess of DHW setpoint in boiler control. A field supplied ASSE 1017 or ASSE 1070
listed tempering valve is required as part of this boiler’s installation.
CAUTION
Component Damage.
Excessive heat from soldering could damage gaskets at connection between DHW
adapters and boiler. Solder connections to DHW adapters before installing gaskets.
!
!
A
Cold Water Supply
Hot Water To Fixtures
Expansion Tank
(Req'd if cold water
supply has check valve)
Drain
Valve
Drain
Valve
DHW
Pressure
Relief Valve
ASSE 1017 or ASSE 1070
Listed Tempering Valve
(required)
DHW Flow Limiter*
(inside boiler)
DHW Strainer*
(inside boiler)
*Supplied with boiler
DHW Adapters* (G 1/2" to 3/4" sweat)
Detail A
(Scale 1 : 4)
Cold Water Supply
Hot Water To Fixtures
Hot Water
(From Boiler)
11 Domestic Water Piping (continued)
Figure 11-2: Standard DHW Piping
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