Installation / Operation Instruction Manual

Table Of Contents
Page 31
NOTE: This drawing shows suggested
piping conguration and
valving. Check with local codes
and ordinances for additional
requirements.
transmit noise through the system resulting from piping
sliding in the hangers. We recommend that padding be
used when rigid hangers are installed. Maintain 1” (2.5
cm) clearance to combustibles for hot water pipes.
Pipe the discharge of the relief valve (full size) to the
drain or in a manner to prevent injury in the event of
pressure relief. Install a diaphragm-type expansion
tank, ow check, and shuto󰀨 valves where needed or as
required by code.
5.B.3 Cold Water Make-Up
The cold water make-up may be connected to the tank
as shown in Figure 12 through Figure 14. If the tank
does not have a tapping for the cold water supply, the
supply may be run to the pipe between the tank and
boiler inlet. Install back-ow preventers and shut-o󰀨s
where needed or required by code.
5.B Water Heaters
5.B.1 Water Quality
Water heaters must be installed in water conditions
of 15 gpg hardness or less, with a pH range of 6.5 to
9.5 pH. Values outside of this range may reduce the
life expectancy of the product. Operating at higher
water hardness levels will cause heat exchanger
fouling, erosion, or corrosion, Leading to premature
component failure, reduced e󰀩ciency, heat exchanger
failure or system failure. Failure of this type will not be
warranted. If the water in use exceeds the conditions
recommended, water softeners or other devices should
be installed to improve water quality.
5.B.2 Heater Water Connections
The water piping should be supported by suitable
hangers and oor stands. Do not support the piping with
this unit. The hangers used should allow for expansion
and contraction of copper pipe. Rigid hangers may
Figure 12. DHW Piping - One Heater, One Vertical Tank
NOTES:
1. Locate DHW sensor or remote aquastat well
in lower 1/3 of tank.
2. Backow preventer may be required - check local codes.
3. Thermal expansion tank may be required - check local codes.
4. Caution: Pump sizing must be based upon water hardness at job site.
5. If the tank does not have a tapping for the cold water supply, the supply may be run
to the pipe between the tank and boiler inlet.
Pump
TPRV
Supply
1
Building
return
Expansion
tank
Cold
water
supply
3
2