Filter
Top Products
P/N 472128 Rev. E 11-5-07
10
PUMP
FILTER
POOL
HEATER
CHECK
VALVE
MANUAL
BY-PASS
ISOLATION
VALVE
ISOLATION
VALVE
TO
POOL
CHECK
VALVE
FROM
POOL
2
1
3
S
P
A
T
E
M
P
H
O
T
P
O
O
L
T
E
M
P
C
O
L
D
O
F
F
S
P
A
P
O
O
L
T
H
E
R
M
O
S
T
A
T
S
E
L
E
C
T
H
O
T
C
O
L
D
Installation (contd.)
Figure 10.
Optional.
Required when installation is below water level.
Required when flow rates exceed 120 gpm.
3
1
2
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.
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Table 6.
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.
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.