Pentair MASTERTEMP 125 Installation And User Manual

MASTERTEMP
®
125 Pool and Spa Heater Installation and User’s Guide Rev. B 8/14
44
Burner Troubleshooting
SYMPTOM CAUSE REMEDY
Loud, high-pitched whine Flame is too rich. Verify pressure tap between gas valve
and blower inlet.
See page 16 and verify that the gas
regulator setting is
–0.2" (–0.5cm) wc.
Flame is “fluttery .” Flame is too lean. See page 16 and verify that the gas
Exhaust may have acrid regulator setting is –0.2" (–0.5cm) wc.
smell or burner may f
ail
to stay lit.
Burner pulsates or Exhaust vent is too long. Reduce length of exhaust vent and/or
surges, especially on
number of
elbows.
ignition.
Combustion appears Flame current is not Check for wet or damaged igniter with
normal, but flame does being sensed.
low resistance to ground. Replacewith
not stay lit.
new igniter.
Verify burner flameholder is properly
grounded.
Ignition Control Module.
Heat Exchanger Troubleshooting
SYMPTOM CAUSE REMEDY
Boiling in heat exchanger. Low water flow to heater. pump and or filter.
May be accompanied by
Heat exchanger plugged. Service
Service
heat exchanger. Correct water
“bumping” sounds.
chemistry.
Bypass valve stuck open. Service bypass valve.
Thermal governor stuck Replace
Replace
Replace
Contact a qualified technician or service
agency to replace the gas orifice.
Contact a qualified technician or service
agency to replace the gas orifice.
thermal governor
.
closed.
Sweating. Thermal governor failed. thermal governor
.
Section 5. Troubleshooting

Pentair MASTERTEMP 125 Specifications

General

BTU Output	125, 000 BTU/hr
Fuel Type	Natural Gas or Propane
Ignition System	Electronic
Minimum Flow Rate	20 GPM
Maximum Working Pressure	50 PSI
Efficiency	82%
Water Connections	1.5 inch
Certifications	ANSI Z21.56
Voltage	120V