Section 3. Water Connections; Plumbing Layout; Water Connections At Heat Pump; Check Valve Installation - Jandy JRT Serie Manuel D'installation

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ENGLISH

Section 3. Water Connections

3.1

Plumbing Layout

Figure 4 illustrates the standard plumbing layout with a
single heat pump unit. Following the diagram from right
to left, the plumbing sequence is as follows:
Pool > Pool Pump > Filter > Heat Pump > Check
Valve > Chemical Loop > Chlorinator > Pool
NOTE For normal installations, do not install a shutoff
valve or any kind of variable restriction in the
water piping between the heat pump outlet and
the pool/spa.
Arrangement of pool system components other than
as illustrated in the preceding and following diagrams
can affect the operation of the heat pump's water
pressure switch. Location of the heat pump above or
below the pool water surface can also affect operation
of the switch. In general, the pressure switch can be
adjusted to accommodate this effect if the heat pump
water connections are no more than 10 feet below the
pool water surface or no more than 5 feet above it. See
instructions for pressure switch adjustment (Section
5.6) in the heat pump start-up section of this manual for
more information. If the heat pump is installed outside
of this range, an external flow switch may need to be
installed in the plumbing upstream of the heat pump.
Call the Jandy technical support department at
(800) 822-7933 for details.
Be advised that when pool equipment is located
below the pool surface a leak can result in large scale
water loss or flooding. Jandy cannot be responsible
for such water loss or flooding or the damage caused
by either occurrence.
3.2

Water Connections at Heat Pump

Filtered water is plumbed to the inlet, located on the
right side of the heat pump front panel. Heated water
flows through the outlet, located on the left side of the
heat pump front. Two inch unions are provided.
Plastic piping (PVC Schedule 40) should be connected
to the heat pump. The unions, provided with the unit,
accept 2" PVC pipe.
CAUTION
Make sure that flow requirements and pool
water turn over rates can be maintained with
the installation of additional heat pumps and
plumbing restrictions.
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Jandy ® JRT Series Heat Pumps
3.3
A check valve can interfere with the proper
operation of certain Suction Vacuum Release
System (SVRS) products. To avoid possible
entrapment hazard, serious injury, or death,
make sure to review the operation/owners
manual of your particular SVRS product
before installing the check valve.
The heat pump must be protected from back-siphoning
of water. If there is any chance of back-siphoning,
provide a check valve between the pool and the filter
pump inlet.
When an automatic chemical feeder is installed in the
plumbing, it must be installed downstream of the heat
pump. A check valve must be installed between the
heat pump and the chemical feeder to prevent back-
siphoning of chemically saturated water into the heat
pump where it will damage the components.
3.4
Heat Pump and Heater Combination
In certain regions of the country it may be more
economical to run a heat pump during the warmer
months and a gas heater during the cooler months.
In some situations it may be desirable to run the heat
pump in the "Chiller" mode during the hottest portion of
the year and a heater during the cooler months.
The Jandy
or electric heater or any combination of heat sources
including solar. All heat sources must be plumbed in
series to work correctly and efficiently.
Figure 5 illustrates a recommended plumbing layout
for a heat pump / heater / solar combination heating
system for a pool / spa combination. Your system may
not contain all of these components, but the basic
plumbing will apply by eliminating the component in
the illustration that is not a part of your system.
Multiple Heat Pump Connections
All plumbing on multiple heat pump installations must
be done in parallel (see Figures 6 and 7). An equal flow
of water to each heat pump is important for optimum
operation.
NOTE It may be necessary to adjust water pressure
NOTE Each heat pump allows a maximum flow rate of
Installation and Operation Manual

Check Valve Installation

WARNING

Multiple Unit Installation

heat pump may be plumbed with a gas
®
switch if a unit is installed below the water level.
See Section 5.6 for details on when and how to
adjust the pressure switch.
70 gpm (265 lpm) and requires a minimum of
20 gpm (76 lpm) for JRT2000R/2500R and
30 gpm (114 lpm) for JRT3000R.