Delta PG PLUS-25 - Manual (Page 21)

Domestic Piping
The installer must install discharge piping
onto the T&P relief valve. The discharge
piping must be:
• Made of material serviceable for tem-
peratures of 250ºF or greater.
• Directed so that any hot water dis-
charge flows away from all persons.
• Directed to a suitable place of drainage.
• Installed as to allow complete draining
of the T&P relief valve and the dis-
charge piping.
• Terminated with a plain end, not with
threads.
Failure to properly direct the discharge
piping of the T&P relief valve may result
in flooding of the area adjacent to the
unit and or lower floors in the structure
causing substantial property damage.
The installer must not install the T&P
relief valve discharge piping in a manner
that is:
• Excessively long: Using more than 2
elbows and/or 15 feet of discharge pip-
ing can reduce the discharge capacity.
• Terminated directly into a drain: The
discharge piping must terminate within
6 inches of the drain. Check with local
plumbing codes for termination guide-
lines.
• The discharge piping is plugged, reduced
in size or restricted in any manner.
• The discharge piping is subject to
f r e e z i n g .
DO NOT install any valves between the
T&P relief valve and the discharge pip-
ing. DO NOT plug the T&P relief valve
or the discharge piping. Improper place-
ment and piping of the T&P relief valve
can cause severe personal injury, death
or substantial property damage.
Thermostatic Mixing Valve
The PERFORMANCE PLUS contains a facto-
ry installed thermostatic mixing valve with
built-in check valve.
The operating range of the thermostatic mixing
is 90ºF to 120ºF.
For applications with a domestic recirculation
loop, the recirculation pump should be con-
trolled by an aquastat. The maximum recom-
mended setting of the aquastat is 10ºF lower
than the thermostatic mixing valve setting.
For proper operation of the thermostatic
mixing valve and to prevent potential
scalding hazards, the recirculation loop
should be controlled by an aquastat. DO
NOT use continuous recirculation.
U-Tube Assembly
The PERFORMANCE PLUS is supplied
with a U-Tube Assembly that directs cold
water to the thermostatic mixing valve.
To install the U-Tube Assembly the
installer must:
1. Disconnect the cold inlet adapter/union
from the thermostatic mixing valve.
2. Using needle-nose pliers remove the
plastic check valve assembly from the
adapter.
DANGER
WARNING
CAUTION
15