30
CHAPTER 5
CHAPTER 5 - INSTINCT COMBI UNITS - DOMESTIC PIPING
5.6. General Piping
• For domestic water piping diagrams, see Fig. 17 on
page 31.
• All plumbing must meet or exceed all local, state
and national plumbing codes.
• Use pipe dope or tape suitable for potable water
systems.
• Use isolation valves to isolate system components.
• Use dielectric unions or couplings to protect hot
and cold water ttings from corrosion when con-
necting dissimilar materials such as copper and gal-
vanized iron pipe.
• When the water supply pressure is higher than 70
psig, it is recommended to install a pressure reduc-
ing valve on cold water supply line to prevent wa-
ter loss through T&P relief valve.
5.7. Thermostatic Mixing Valve
A thermostatic mixing valve must be installed in the
DHW circuit.
The operating range of the thermostatic mixing is 85ºF
[30ºC] to 150ºF [65ºC].
For applications with a domestic recirculation loop, the
recirculation pump should be controlled by an aquastat.
The maximum recommended setting of the aquastat is
10ºF lower than the thermostatic mixing valve setting.
If any adjustment needs to be made to the valve’s tem-
perature setpoint, refer to the manufacturer’s instruc-
tions included with the valve.
For proper operation of the thermostatic
mixing valve and to prevent potential scald-
ing hazards, the recirculation loop should be
controlled by an aquastat. DO NOT use con-
tinuous recirculation.
Failure to comply with this instruction will re-
sult in serious injury, or death.
DANGER
5.8. Storage Tank Installation
For applications requiring high domestic hot water ow
rates for a short period of time (dump load), the install-
er may install a storage type tank (see Fig. 18 on page
32) in the domestic piping.
The installer must :
1. Relocate the thermostatic mixing valve from the IN-
STINCT to the outlet of the storage tank.
2. Remove domestic restrictor at the inlet of the do-
mestic ow sensor.
3. Provide recirculation from the storage tank back to
the INSTINCT using a bronze or stainless steel cir-
culator.
To Next Page
Loading...
Need help?
General
