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Pentair MASTERTEMP 125 Installation And User Manual

Pentair MASTERTEMP 125
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MASTERTEMP
®
125 Pool and Spa Heater Installation and User’s Guide Rev. B 8/14
46
AFTER START-UP
CHECKING WATER FLOW
WARNING
Fire or flooding hazard. If the unit overheats and the burner fails to shut off, follow instructions under “To Turn Off Gas to the
Appliance”,
page 33, and call a qualified service technician to repair unit.
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SPRING AND FALL OPERATION
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WINTER OPERATION
CAUTION
s /PERATINGTHISHEATERCONTINUOUSLYATWATERTEMPERATURESBELOW½F. (20° C) will cause harmful condensation and will
damage the heater and void the warranty.
s )FTHEHEATERHASBEENDRAINEDFORFREEZINGCONDITIONDO./4TURNh/.vUNTILTHESYSTEMISCIRCULATINGWATER
s Water trapped in the heat exchanger can result in freeze damage to the exchanger or headers. Freeze damage is specifically
not covered by the warranty.
s 7HENSTARTINGTHEHEATERFORTHESWIMMINGSEASONWITHAWATERTEMPERATUREBELOW½&½#THEHEATERMAYBEUSED
to heat the water; however, make sure that the heater operates continuously until the water temperature reaches the
heater’s minimum setting of 68° F (20° C). During cold weather, if there is no danger of freezing, operate the filter pump
continuously even if the heater is not operating. If air temperatures are expected to drop below freezing (32° F/0° C), shut
down the heater and winterize it.
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WARNING
Explosion hazard. Purging the system with compressed air can cause components to explode, with risk of severe injury or death
to anyone nearby. Use only a low pressure (below 5 PSI or 35 kPa), high volume blower when air purging the heater, pump,
filter, or piping.
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NOTICE:Water trapped in the heater can cause freeze damage. Allowing the heater to freeze voids the warranty.
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(See additional notes under Important Notices in Introduction.)
Section 6. Maintenance

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Pentair MASTERTEMP 125 Specifications

General IconGeneral
BTU Output125, 000 BTU/hr
Fuel TypeNatural Gas or Propane
Ignition SystemElectronic
Minimum Flow Rate20 GPM
Maximum Working Pressure50 PSI
Efficiency82%
Water Connections1.5 inch
CertificationsANSI Z21.56
Voltage120V

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