AMP AMPW 1000, Installation, Operation And Maintenance Manual, Page: 37 / 72

AMPW 400-1000L I&O Manual
37
IX. Water Piping
The AMP water heater is considered to be a circulating
water heater or hot water supply boiler. This Product will
operate most efficiently and reliably when paired with one
or more storage tanks.
A. General Piping Guidelines
Suggested piping configurations are shown in diagram
form in section "X. Water Piping Diagrams". The fol -
lowing steps are general guidelines for installing the
AMP water heater in a hot water supply system. The
installer is responsible for complying with local codes.
1. The cold water return line shall be connected
to the inlet of the appliance labeled "cold water
connection"
2. The hot water supply line shall be connected to
the outlet manifold of the appliance shown in
Figure 16.
3. The system cold water supply line shall include a
backflow preventer/check valve and properly sized
expansion tank for the capacity of the system.
4. A drain valve should be installed at the lowest point
in the system
5. The AMP is a condensing appliance. The return
water and cold water supply should be piped to
the primary loop going into the appliance.
6. Circulation pump must be installed in the primary
piping between the tank and the water heater.
NOTICE NOTICE
Failure to properly pipe appliance may result in
improper operation and damage.
Install the appliance so that the gas ignition system
components are protected from water (dripping,
spraying, rain, etc.) during appliance operation and
service (circulatory replacement, cleaning, etc.).
Contamination of the water by corrosive chemicals
will cause corrosion of the steel components, and
can lead to appliance failure. Thermal Solutions’
Standard Warranty does not cover problems
caused by contamination of supply water.
Installation is not complete unless a safety relief
valve is installed in the outlet manifold of the appli -
ance or the hot water piping shortly downstream
of the appliance.
Failure to maintain the flow through the appliance
within the specified limits could result in erratic
operation or premature failure.
The circulator shall be sized properly based on the
pressure drop of the entire loop and the desired
temperature rise.
Maintain 1” (24mm) clearance around all uninsu
-
lated hot water pipes. The piping going into the
cold water inlet of the appliance can still be hot
from circulating the water in the tank.