COMMISSIONING
37
OUTLET TEMPERATURE COMPENSATION ADJUSTMENT
The maximum outlet temperature of an E5X series 50°C limited water heater may be adjusted to compensate
for temperature losses in the pipe work between the water heater outlet and fixtures used primarily for personal
hygiene. This adjustment may only be made by a plumber.
Warning:
After adjustment of the temperature limiting valve, the water temperature
MUST NOT
exceed
50°C from the first tap in the pipe work after the water heater and used for personal hygiene, such as in a
bathroom or ensuite.
To adjust the maximum outlet temperature:
•
Ensure the temperature of the water in the water heater is up to at least 65°C.
The temperature of the water can be measured at
the temperature pressure relief valve drain
discharge point. Do not measure this temperature
from a hot tap
▪
Operate the easing lever on the temperature
pressure relief valve and place the
thermometer in the flow of water from the
relief valve drain line.
•
Remove the upper plastic casing and insulation
covering the pipe work on the side of the water
heater, by removing the three (3) retaining
screws, to expose the temperature limiting valve.
•
Locate the first hot tap in the hot water pipe work
after the water heater used for personal hygiene.
•
Turn on the hot tap fully to achieve maximum flow.
•
Using a thermometer, measure the temperature
of the water from the tap, until the temperature
stops increasing.
If the water temperature is below 50°C the
maximum outlet temperature of the outlet can be
adjusted upwards.
•
Turn the adjusting knob on the temperature
limiting valve counter-clockwise (down away from
the water heater), using a 6 mm Allen key.
Turning the adjusting knob counter clockwise
(down away from the water heater) increases the
outlet water temperature, turning it clockwise (up
towards the water heater) decreases the outlet
water temperature.
•
Repeat the water temperature measurement from the same hot tap.
•
Further adjust the temperature limiting valve as required, turning the adjusting knob either counter
clockwise (down away from the water heater) or clockwise (up towards the water heater) to increase or
decrease the outlet water temperature, until an acceptable water temperature not exceeding 50°C is
measured at the same hot tap.
Note:
The valve has a stop point for the maximum outlet water temperature adjustment. The outlet water
temperature cannot be increased beyond this point. It is possible that, depending upon valve tolerances
and the pipe work design, 50°C water temperature may not be attainable at the hot tap.
The valve does not have a stop point for the minimum outlet water temperature adjustment. If adjusted
too far, the adjustment screw will disengage and a water leak will result. If this occurs, turn the adjustment
screw counter clockwise (down away from the water heater) to re-engage with the valve and stop the leak.
•
Turn off the hot tap.
•
Replace the insulation and plastic casing to cover the temperature limiting valve and pipe work on the side
of the water heater and secure using the three (3) retaining screws.
