NCC300 Owner's Guide
39
The water is cold when only a
singlextureisopen.
• Theunitwillnotheatthewateriftheowrateislessthan
0.5 gallons (2L) per minute.
Openthexturemoreoropenotherxturessothatagreater
owpassesthroughtheunit,andtheunitshouldbegin
heating again.
Amount of Hot Water
The amount of hot water at a
certainxtureisnotconstant.
• Whenhotwaterisdemandedatotherxtures,theamount
availablemaybereduced.Themaximumowavailable
from this unit is 12.5 GPM (47.4L/min.) at a 45°F (25°C)
temperature rise.
• Pressureuctuationsandotherplumbingconditionscan
causethetemperatureandpressureataxturetobe
unstable, but it should stabilize after a short time.
• There are some types of hot water taps that discharges
largevolumesofhotwateratrstbutstabilizeaftertime.
• To keep the temperature stable, the heater limits the
amountofwaterthatcanowthroughittoasmallamount
initially, but the amount increases over time.
The amount of hot water in the tub
is less/more than the set amount.
• Whenhotwaterisusedforotherxtureswhilellingthe
bathtub,thetubwillnotllasmuch.
• Ifthereiswaterinthetubalready,orwhenllingisstopped
andrestarted,thetubwillllmore.
Theowmeteralarmdoesnot
soundevenwhenlledtotheset
amount.
• Theowmeteralarmissettosoundwhenhotwater
is continuously discharged for the set volume of water.
If mixing valves are used, or if cold water is mixed with hot
wateratthexture,thetubwillllmorethanthesetting
oftheowmeteralarm.
Amount of hot water available
has decreased over time.
Fluctuations in hot water
temperatures.
• Set water temperature at 115°F to 120°F or 48°C (118°F) to
50°C (122°F).Thiswillallowyoutouseahigherowofhot
waterthusmeetingtheminimumowrequirementof0.5
GPM (2L/min.).
• Cleanthewaterlterofanydebris ( p.36)
(Continued)
Setting temperature cannot rise.
• Is the maximum temperature setting appropriate? ( p.23)
•Isthewaterlterclogged?( p.36)
• If the supply water is hard and has not been treated, scale
can build-up in the water heater and decrease the
maximum amount of hot water available. Scale can be
removedfromthewaterheaterbyushingtheunit
periodically. To prevent scale from forming in the water
heater, a water softener or scale inhibitor is
recommended.