Safety Controls: Air Flow Switch (Afs) / Water Pressure Switch / High Limit Devices - Pentair MASTERTEMP 125 Installation And User Manual

SAFETY CONTROLS
AIR FLOW SWITCH (AFS)
air blower (fan) is operating and has been designed to monitor the vacuum (negative)
upstream of the ignition module. The ignition module does not operate unless the
air pressure switch and all safety switches are closed.
WATER PRESSURE SWITCH
Hazardous pressure. Do not bypass the Water Pressure Switch or render
it inoperable.
"Service System"
at 20.6 kPa (3.00 psi). NOTE: See, "Below Pool Level Installation" on
page 8. If the pressure switch is 0.3M (1 ft.) below or above the pool water
level, reset the switch so that it is open when the pump is off and closed
( ) to raise setting (heater below the pool) and counterclockwise
switch after resetting.
NOTICE: When the heater is mounted more than 1.5M
(5 ft.) above or 1.2M (4 ft.) below the deck level, a
must be installed instead.
NOTICE:
warranty.
HIGH LIMITS
electrical circuit and shuts off the heater based on a
Device". The MasterTemp
high limit devices which are located on the main inlet
/ outlet header (see page 43 item 6).
P/N 460906 Rev. B 5/2014
WARNING
will void the
125 heater has two (2)
®
Section 1: Operation Instructions
Turn star wheel clockwise to raise
pressure set point if pressure switch is
more than 4 feet (1.2M) below water level
A reference scale is on
the back of pressure switch
Turn star wheel counterclockwise to lower
pressure set point if pressure switch is more
than 5 feet (1.5M) above water level
MASTERTEMP 125 Pool and Spa Heater Installation and User's Guide
™
Air Flow Switch
Figure 29.
Water
Pressure
Switch
Star Wheel
| 3
Figure 4.
Figure 5.
Figure 30.
Figure 6.