Use and Care Manual

25
The water is cold when only a
single xture is open.
• The unit will not heat the water if the ow rate is less than
0.29GPM (1.1L/min)*.
Open the xture more or open other xtures so that a greater ow
passes through the unit, and the unit should begin heating again.
* Minimum activation ow rate : 0.5 GPM (2.0L/min)
Minimum operating ow rate : 0.29 GPM (1.1L/min)
Amount of Hot Water
The amount of hot water at a
certain xture is not constant.
• When hot water is demanded at other xtures, the amount available
may be reduced. The maximum ow available from EZ111DV (GQ-C3259
WX-FF US) is 8.7 GPM (33L/min.) at a 45°F (25°C) temperature rise.
The maximum ow available from EZ98DV (GQ-C2859 WX-FF US)
is 7.6 GPM (29L/min.) at a 45°F (25°C) temperature rise.
• Pressure uctuations and other plumbing conditions can
cause the temperature and pressure at a xture 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 rst but stabilize after time.
• To keep the temperature stable, the heater limits the
amount of water that can ow through it to a small amount
initially, but the amount increases over time.
The amount of hot water in the tub
is less/more than the set amount.
• When hot water is used for other xtures while lling the
bath tub, the tub will not ll as much.
• If there is water in the tub already, or when lling is stopped
and restarted, the tub will ll more.
The ow meter alarm does not
sound even when lled to the set
amount.
• The ow meter alarm is set to sound when hot water
is continuously discharged for the set volume of water.
If mixing valves are used, or if cold water is mixed with hot
water at the xture, the tub will ll more than the setting
of the ow meter alarm.
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). This will allow you to use a higher ow of hot water thus
meeting the minimum ow requirement of 0.29GPM (1.1L/min)*.
* Minimum activation ow rate : 0.5 GPM (2.0L/min)
Minimum operating ow rate : 0.29 GPM (1.1L/min)
• Clean the water lter of any debris ( p.22)
(Continued)
Setting temperature cannot rise.
• Is the maximum temperature setting appropriate? ( p.17)
• Is the water lter clogged? (
p.22)
•
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 removed from the water heater by
ushing the unit periodically. To prevent scale from forming in the
water heater, a water softener or scale inhibitor is recommended.