Water Connections; Below Pool Installation - Pentair Pool Products MasterTemp 175K BTU/HR Manual De Instalación Y Operación

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WATER CONNECTIONS

The heater requires proper water flow and pressure for its
operation.
See Figure 5
for the recommended installation.
The filter pump discharges to the filter, the filter discharges
to the heater, and the heater discharges directly to the pool
or spa.
A manual bypass valve should be installed across the heater
when the pump flow exceeds 120 GPM (454 LPM). See
"WATER FLOW RATE" on
the manual by-pass valve.
Make sure that the outlet plumbing from the heater contains
no shut-off valves or other flow restrictions that could prevent
flow through the heater (except for below pool as noted
below, or winterizing valves where needed). To switch flow
between the pool and spa, use a diverter valve. Do not use
any valve that can shut off the flow. Do not use a shut-off
valve to isolate the heater unless it is below the level of the
pool or spa.
Install the chemical feeder downstream of the heater. Install a chemical resistant one-way check valve between the
heater and the chemical feeder to prevent back-siphoning through the heater when the pump is off.
NOTICE: If the heater is plumbed in backwards, it will cycle continuously. Make sure piping from filter is not reversed
when installing heater.
Connect the heater directly to 2" PVC pipe, using the integral unions provided. Heat sinks are not required. The low
thermal mass of the heater will prevent overheating of the piping connected to the pump even if the heater shuts down
unexpectedly.
Occasionally a two-speed pump will not develop enough pressure on the low speed to operate the heater. In this case, run
the pump at high speed only to operate the heater. If this does not solve the problem, do not try to run the heater. Instead,
correct the installation.
Do not operate the heater while an automatic pool cleaner is also operating. If the circulation pump suction is plugged (for
example by leaves), there may not be adequate flow to the heater. Do not rely on the pressure switch in this case.

BELOW POOL INSTALLATION

If the heater is below water level, the pressure switch must be adjusted. This adjustment must be done by a qualified
service technician.
See following CAUTION before installation.
The water pressure switch is set in the factory at 3.00 PSI (± 0.75 PSI). This setting is for a heater installed at pool level.
If the heater is to be installed more than 1' above or below, the water pressure switch must be adjusted by a qualified
service technician.
See page 34, Figure 29.
If the heater is installed more than 5' above the pool or more than 4' below the pool level, you will be beyond the limits
of the pressure switch and a flow switch must be installed. Locate and install the flow switch externally on the outlet
piping from the heater, as close as possible to the heater. Connect the flow switch wires in place of the water
pressure switch wires.
P/N 472592
page 11- Table 1
for setting of
CAUTION
BELOW OR ABOVE POOL INSTALLATION
FLOW SWITCH
Main
Drain
Pool
From Pool
3-Way
Valve
Section 3. Installation
3-Way
Chlorinator
Valve
Check Valve
Heater
Filter
Spa
Pump
3-Way
Valve
Figure 5.
Rev. C 10-5-07

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