P/N 475114 Rev. F 9/2020 MASTERTEMP 125 Pool and Spa Heater Installation and User’s Guide
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WARNING
Should overheating occur or the gas supply fail to shut off, turn off the manual gas control valve to the heater.
Do not use this heater if any part has been under water. Immediately call a qualified service technician to
inspect the heater and to replace any part of control system and gas control which has been under water.
CONSUMER INFORMATION AND SAFETY
WARNING
The Consumer Product Safety Commission warns that elevated water temperature can be hazardous. See below for
water temperature guidelines before setting temperature.
1. Spa or hot tub water temperatures should never exceed 40° C (104° F). A temperature of 38° C (100° F) is considered
safe for a healthy adult. Special caution is suggested for young children.
2. Drinking of alcoholic beverages before or during spa or hot tub use can cause drowsiness which could lead to
unconsciousness and subsequently result in drowning.
3. Pregnant women beware! Soaking in water above 39° C (102° F) can cause fetal damage during the rst three
months of pregnancy (resulting in the birth of a brain-damaged or deformed child). Pregnant women should stick
to the 38° C (100° F) maximum rule.
4. Before entering the spa or hot tub, the user should check the water temperature with an accurate thermometer. Spa
or hot tub thermostats may err in regulating water temperatures by as much as 2.2° C (4° F).
5. Persons with a medical history of heart disease, circulatory problems, diabetes or blood pressure problems should
obtain their physician’s advice before using spas or hot tubs.
6. Persons taking medication which induce drowsiness, such as tranquilizers, antihistamines or anticoagulants should
not use spas or hot tubs.
DANGER
CARBON MONOXIDE GAS IS DEADLY – Exhaust from this pool heater contains toxic levels of carbon monoxide, a dangerous,
poisonous gas you cannot see or smell.
THE MASTERTEMP HEATER IS CLASSIFIED AS A CLASS 5 LOW NOX BOILER.
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Warnings and Safety Instructions
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