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P/N 471048 Rev. G 1-22-04
14
PLUMBING CONNECTIONS
The MiniMax Plus heater has the unique capability of
direct schedule 40 PVC plumbing connections. A
Quick-Flange has been included with the MiniMax
Plus to insure conformity with PurexTriton’s recom-
mended PVC plumbing procedure. Other plumbing
connections can be used. The instructions on page 13
show methods for successfully connecting plumbing to
the inlet/outlet header, with the Quick-Flange.
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.
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.
WATER CONNECTIONS
Reversible Inlet/Outlet Connection
The MiniMax Plus heater is factory assembled with
right side inlet/outlet water connections. The inlet/
outlet header can be reversed for left side water
connections without removing the heat exchanger.
Reversing Water Connections
Disassembly
Tools needed:
1/4 in Nut Driver
9/16 in. Socket and Wrench
1/2 in. & 9/16 in. Open Wrench
1. Remove the inspection plates.
2. Disconnect all wires from the high-limit
switches except the short jumper wire. The
exact order of the disconnection is not impor-
tant.
3. Disconnect the pressure switch wiring.
4. Remove the temperature sensing bulb from the
in/out header. Note: You may cut the wire
bundle ties.
5. Exchange the in/out header with the return
header. Replace the heat exchanger tube seals
with new seals provided in the Quick-Flange
Accessory Bag.
6. Install the temperature sensing bulb by passing
the wires through the hole provided on the left
side of the brace panel. Route wires through the
support bracket.
7. Reconnect all the high limit wires. Reconnect
the pressure switch wiring. Route the wires
through the same hole as the thermostat sensor
wires.
8. Reinstall the inspection plates.
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.
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Installation (contd.)
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.
Table 6.
PUMP
FILTER
POOL
HEATER
CHECK
VALVE
MANUAL
BY-PASS
ISOLATION
VALVE
ISOLATION
VALVE
TO
POOL
CHECK
VALVE
FROM
POOL
2
1
3
Figure 12.
Optional.
Required when installation is below water level.
Required when flow rates exceed 120 gpm.
3
1
2