Installation (contd.)

10

 

 

 

 

 

TO

 

PUMP

 

 

 

POOL

 

 

POOL

 

MANUAL

 

FILTER

 

3

ISOLATION

 

 

HEATER

BY-PASS

 

 

VALVE

 

 

 

 

1 CHECK

 

 

 

 

 

VALVE

 

 

 

 

 

 

ISOLATION

 

 

 

 

 

VALVE

 

 

1 Optional.

 

 

 

VALVECHECK 2

 

2 Required when installation is below water level.

FROM

 

POOL

Figure 10.

3 Required when flow rates exceed 120 gpm.

 

PLUMBING CONNECTIONS

The MiniMax® CH heater has the unique capability of direct schedule 40 PVC 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.

PLUMBING

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 siphon.

CAUTION

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 non-corrosive “Check Valve”, (P/N R172288), between the feeder and heater.

MANUAL BY-PASS

Where the flow rate exceeds the maximum 120 GPM, a manual bypass should be installed and adjusted. After adjustments are made, the valve handle should be removed to avoid tampering.

Model

Min.

Max. *

 

 

 

150

20

120

 

 

 

200

20

120

 

 

 

250

30

120

 

 

 

300

30

120

 

 

 

350

40

120

 

 

 

400

40

120

 

 

 

* Do not exceed the maximum recommended flow rate for the connecting piping.

Table 6.

BELOW POOL INSTALLATION

If the heater is below water level, the pressure switch should be adjusted. This adjustment must be done by a qualified service technician.

See following CAUTION.

CAUTION

BELOW OR ABOVE POOL INSTALLATION

The water pressure switch is set in the factory at 1½ PSI. This setting is for a heater installed at pool level or within 3’ above or 3’ below. If the heater is to be installed more that 3’ above or 3’ below, the water pressure switch must be adjusted by a qualified service technician.

FLOW SWITCH

If the heater is installed more the 6’ above the pool or more than 10’ 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 472128

Rev. E 11-5-07

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Pentair Hot Tub manual Plumbing Connections
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Hot Tub specifications

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