16
6. Domestic Piping
Section VI: Domestic Piping
HOT WATER CAN SCALD!
• Water temperatures over 125°F [52°C] can cause se-
vere burns instantly, or death from scalds.
• Feel water before bathing or showering.
• Consumer Product Safety Commission and some
states recommend temperature settings of 130°F
[54°C] or less. Setting thermostat higher than
130°F [54°C] will increase risk of scald injury and
cause severe personal injury or death.
• Water heated to a temperature suited for clothes
washing, dish washing and other sanitization needs
will scald and cause permanent injury.
• Children and elderly, infirm, or physcally handi-
capped persons are more likely to be injured by hot
water. Never leave them unattended in or near a
bathtub. If anyone using hot water in the building
fits this description, or if state laws or local codes
require certain water temperatures at hot water
faucets, take special precautions.
- Install the factory supplied thermostatic
mixing valve at the water heater. Installa-
tion must comply with valve manufac-
turer’s recommendation and instructions.
- Use the lowest practical temperature set
ting
- Check water temperature after any adjust-
ment. You must follow “Setting the Ther-
mostatic Mixing Valve” procedure in Sec-
tion 6.13.
WARNING
6.1 General Notes
• Household water usage patterns will affect water temperature
at any faucet or shower. Occasionally check temperature at
each point of use, then adjust thermostatic mixing valve
accordingly. Always recheck temperature after adjusting.
• Lowering the thermostatic mixing valves as indicated in these
instructions will reduce water temperature levels. Consult
your installer or service technician.
6.2 Operating Restrictions
• Minimum DHW flow rate is 0.5 gpm [2lpm] to initiate a
domestic call.
• Maximum DHW outlet temperature is 149°F [65°C].
• Minimum domestic working pressure is 40 psig [3 bar].
When the CHALLENGER is installed in a domestic well
application, the cut in pressure of the domestic well
pump’s control must be set to 40 psig [3 bar] to ensure
more consistent domestic flow and temperature per-
formance.
• Maximum domestic working pressure is 150psig [10bar].
• Water quality limitations (based on E.P.A National Secondary
Drinking Water Regulations):
- Chloride, less than 150ppm or mg/l.
- pH value min. 6.5, max. 8.5.
- Total hardness 3 - 7 grains/gallon or 50 - 120 ppm or mg/l.
- Total Dissolved Solids (TDS), less than 120 ppm or mg/l.
- Iron, less than 0.3 ppm or mg/l
- Aluminum, less than 0.2 ppm or mg/l
- Copper, less than 1 ppm or mg/l
- Manganese, less than 0.05 ppm or mg/l
-Zinc, less than 5 ppm or mg/l
In hard water areas (more than 7 grains of hardness)
soften the cold domestic supply water to the appliance
to prevent scaling.
Any water conditioning system must be installed and
maintained in accordance with manufacturer’s specifi-
cations.
NOTICE
BEST PRACTICE
NOTICE
BURN
Summary of Contents for CC105
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