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IX. Hydronic Piping
A. AMP Boiler 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.
B. General Piping Guidelines
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.
d. For possible piping configurations, see section
"X. Heating Boiler Piping diagrams".
C. Factory Supplied Outlet Water Manifold
Temperature &
Pressure Gauge
Water Flow Switch
Figure 14: Factory Supplied Water Manifold
Low Water Cut-off
Pressure
Relief Valve
!
Failure to properly pipe boiler may result in
improper operation and damage to the boiler or
structure.
Install boiler so that the gas ignition system
components are protected from water (dripping,
spraying, rain, etc.) during appliance operation and
service (circulator replacement, etc.).
Oxygen contamination of the boiler water
will cause corrosion of iron and steel boiler
components, and can lead to boiler failure.
Thermal Solutions' Standard Warranty does not
cover problems caused by oxygen contamination
of boiler water or scale (lime) build-up caused by
frequent addition of water.
Installation is not complete unless a safety relief
valve is installed in the trapping located on the
water manifold or the supply piping.
Failure to maintain the flow through boiler within
specified limits could result in erratic operation or
premature boiler failure.
Where it is not possible to install a separate boiler
loop, the system circulator must be sized to ensure
that the flow through boiler stays within the
defined parameters to prevent overheating when
the boiler is fired at it's full rated input. Install a
flow meter to measure the flow, or fire the boiler
at full rate and ensure the boiler delta T does not
exceed 55F.
It is recommended that the boiler piping systems
utilize Primary/Secondary configurations. The
use of other piping configurations could result in
improper building and system flow rates leading
to boiler high limit shutdowns and poor system
performance.
Maintain 1" (24mm) clearance around all
uninsulated hot water pipes.
39
CAUTION
CAUTION
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