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PLUMBING CONNECTIONS
The MasterTemp™ heater has the capability of direct PVC
water piping plumbing connections. A set of bulkhead fittings
is included with the MasterTemp to insure conformity with
Pentair's recommended PVC plumbing procedure. Other
plumbing connections can be used. See Figure 11 for plumbing
connections.
CAUTION
Before operating the heater on a new installation, turn on
the circulation pump and bleed all the air from the filter using
the air relief valve on top of the filter. Water should flow
freely through the heater. Do not operate the heater unless
water in the pool/spa is at the proper level. If a manual by-
pass is installed, temporarily close it to insure that all air is
purged from the heater.
VALVES
When any equipment is located below the surface of the pool or spa, valves should be placed in the circulation piping
system to isolate the equipment from the pool or spa. Check valves are recommended to prevent back-siphoning. Back-
siphoning is most likely to occur when the pump stops, creating a pressure-suction differential. Do NOT sanitize the pool
by putting chlorine tablets or sticks into the skimmer(s). When the pump is off, this will cause a high concentration of
chlorine to enter the heater, which could cause corrosion damage to the heat exchanger.
Exercise care when installing chemical feeders so as to not allow back siphoning of chemical into the heater, filters
or pump. When chemical feeders are installed in the circulation of the piping system, make sure the feeder outlet line
is down stream of the heater, and is equipped with a positive seal noncorrosive "Check Valve", (P/N R172288),
between the feeder and heater.
MANUAL BY-PASS
Where the water flow rate exceeds the maximum 454 L/m, a manual
bypass should be installed and adjusted. After installing the valve, adjust
the valve to bring the flow rate within the acceptable range. Then remove
the valve handle or lock it in place to avoid tampering. See
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See page 33 for Pressure Relief Valve Installations.
P/N 475106 Rev. D 1/2016
All manuals and user guides at all-guides.com
( WATER FLOW RATE)
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POOL
HEATER
Figure 10.
CAUTION
Figure
11.
* )
d
Table 1.
Figure 11.
™
MASTERTEMP
Pool and Spa Heater Installation and User's Guide
Section 2. Installation
TO
POOL
FILTER
MANUAL
BY-PASS
GATE
VALVE
Warm water out
1. Set Manual By-Pass Valve.
2. Remove Handle.
Outlet to pool
| 9
PUMP
FROM
POOL
Cool water in
Inlet to heater
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