Instinct Installation Manual

24
WARNING
CHAPTER 5 - INSTINCT COMBI UNITS - DOMESTIC PIPING
Pressure relief valve discharge piping must not be:
• Ex cessiv ely long . Using mor e than 2 elbo ws or
15 feet of piping can reduce discharge capacity.
• Directly connected to a drain. Terminate
discharge piping within 6” from drain. Refer to
local codes.
• P lugged , r educed or r estr ic t ed .
• Subject to freezing.
Do not install any valve between
pressure relief valve and tank connection or
on pressure relief valve discharge piping. Do
not plug pressure relief valve or discharge
piping. Improper placement and piping of
T&P relief valve can cause severe personal
injury, death or substantial property damage.
5.2. Thermal Expansion
If a backflow preventer, check valve or pressure reducing
valve is piped on cold water supply piping of water
heater, install an expansion tank on cold water supply
line to prevent thermal expansion from repeatedly
forcing open pressure relief valve.
NOTICE
The pressure relief valve is not intended for
constant duty, such as relief of pressure due to
repeated normal thermal expansion. Correct
this condition by installing a properly sized
expansion tank in the domestic water system.
Refer to expansion tank manufacturer’s
installation instructions for proper sizing.
Stepper motor + cartridge
CH RETURN
to PUMP
Plate-to-plate heat exchanger
1”
1”
1”
3/4”
DHW Temperature Sesnor Flow Sensor
3/4”
1”
CH SUPPLY
DHW SUPPLY
DHW INLET
CH RETURN
Fig. 13 - INSTINCT Combi - Hydro-block Flow Diagram
CHAPTER 5