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W a t e r- t o - W a t e r ( 5 0 Y E R ) S e r i e s - P u r o n
R e v. : 1 J u l y, 2 0 1 0
Load Side Plumbing Installation
50YER Unit Load Plumbing
The applications are too varied to describe in this document.
However, some basic guidelines will be presented. Much of the
discussions on water loop applications would be valid for the
load plumbing discussion as well. All plumbing should conform
to local codes with the following considerations:
Wide temperature variation applications such as heating/
cooling coils:
-
Employ piping materials that are rated for the maximum
temperature and pressure combination. This excludes
PVC for most heating applications.
-
Insure that load water flow in high temperature heating
applications is at least 3 gpm per ton [3.9 l/m per kW]
to improve performance and reduce nuisance high
pressure faults.
-
DO NOT employ plastic to metal threaded joints
-
Utilize a pressure tank and air separator vent system to
equalize pressure and remove air.
Swimming Pool Hot Tub Applications:
-
Load coax should be isolated with secondary heat
exchanger constructed of anti-corrosion material in all
chlorine/bromine fluid applications.
Potable Water Applications:
-
Load coax material should always be vented double
walled for use in potable water systems.
-
Insure load water flow in high temperature heating
applications is at least 3 gpm per ton to improve
performance and reduce nuissance to high pressure
faults.
14
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NOTE: It is strongly recommended that all piping
connections, both internal and external to the unit,
be pressure tested by an appropriate method prior
to any finishing of the interior space or before
access to all connections is limited. Test pressure
may not exceed the maximum allowable pressure
for the unit and all components within the water
system. The heat pump manufacturer will not be
responsible or liable for damages from water leaks
due to inadequate or lack of a pressurized leak test,
or damages caused by exceeding the maximum
pressure rating during installation.
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