27
Temperature
Problems
What to do
Display Window
The hot water at the
fixture is not hot enough.
Are the gas and water supply valves fully open?
[Using the optional remote controller]
Is the water temperature setting appropriate? ( p.14)
If the amount of hot water required is very high, it is
possible for the outlet temperature to be lower than the
temperature set on the remote controller.
Decrease the amount of hot water passing through the
unit and the temperature should stabilize.
The actual outlet water temperature is lower than the set
temperature of the unit.
Contact the nearest Noritz agent.
The water is cold when only
a single fixture is open.
The unit will not heat the water if the flow rate is less
than 0.5 gallons (2L) per minute.
Open the fixture more or open other fixtures so that
a greater flow passes through the unit, and the unit
should begin heating again.
The unit does not fire when
water is flowing due to high
supply water temperature.
If you try to supply a low flow of water when the supply
water temperature is too high.
The unit will not fire because it will over heat the outlet water.
[Using the optional remote controller]
Fluctuations in hot water
temperatures.
Set water temperature at 115
°
F to 120
°
F. This will allow
you to use a higher flow of hot water thus meeting the
minimum flow requirement of 0.5 GPM (2L/min.).
Clean the water filter of any debris.
( p.23)
[Using the optional remote controller]
Setting temperature cannot rise.
Is the maximum temperature setting appropriate? ( p.18)
Amount of Hot Water
Problems
What to do
Display Window
The amount of hot water
at a certain fixture is not
constant.
When hot water is demanded at other fixtures, the
amount available may be reduced. The maximum
flow available from this unit is 4.9 GPM (18.7L/min.)
at a 45
°
F (25°C) temperature rise.
Pressure fluctuations and other plumbing conditions
can cause the temperature and pressure at a fixture to
be unstable, but it should stabilize after a short time.
There are some types of hot water taps that discharges
large volumes of hot water at first but stabilize after time.
To keep the temperature stable, the heater limits the
amount of water that can flow through it to a low flow
initially, but the amount increases over time.
