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IX. Hydronic Piping
AMP boilers are designed to operate in a closed loop
pressurized system. Minimum pressure in the boiler must
be 14.5 psi (100 kpa). Proper operation requires a piping
system that can provide sufficient water flow through the
boiler and meet the water quality requirements.
A. General Piping Guidelines
Suggested piping configurations are shown in diagram
form in section "Water Piping Diagrams". The
following steps are general guidelines for installing
the AMP Boiler in space heating systems. The installer
is responsible for complying with local codes.
1. Primary/Secondary piping is the recommended
piping configuration. Isolate the appliance from
the system using closely spaced tees (12 inches or
4 pipe diameter) and size a circulation pump that
ensures sufficient flow is maintained through the
boiler.
a. The flow rate through the primary loop is
maintained by the installer provided circulator.
b. Other piping configurations may be used.
However, it is the responsibility of the installer
to size circulator(s) that could overcome the heat
exchanger and system pressure drops.
c. Inadequate flow through the boiler can cause
high limit shutdowns, hot spots, and localized
boiling which could severely damage the heat
exchanger.
2. A pressure relief valve is included and installed by
factory.
3. When piping the appliance to the system, do not
install an elbow closer than 5 pipe diameters from
the flow switch.
36
WARNING
WARNING
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.
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.
AMP 400-1000L I&O Manual
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