P/N 474131 Rev. M 8/2020 MasterTemp Pool and Spa Heater
13
AUTOMATIC BY-PASS
Figure 5 shows a plumbing diagram for an automatic BY-PASS (IntelliValve). This in conjunction with an IntelliFlo
VSF pump can provide added longevity of the heater and increased cost savings of operation. A 3-Port valve with an
IntelliValve actuator is installed at the heater inlet. A check valve is installed at the heater oulet so that water cannot
flow back into the heater. See instructions for Automatic Bypass valve kit (P/N 462048) for setting the open and closed
position of the IntelliValve.
Figure 5.
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.
CAUTION
BELOW OR ABOVE POOL INSTALLATION
The water pressure switch is set in the factory at 20.6 kPa (± 5 kPa). This setting is for a heater installed at pool level. If
the heater is to be installed more than 0.3 m above or below, the water pressure switch must be adjusted by a qualified
service technician. See
page 42.
FLOW SWITCH
If the heater is installed more than 1.5 m above the pool or more than 1.2 m 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.
Cold Water In
Hot Water Out To Pool
IntelliValve
Check
Valve
Section 1. Installation
