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* In case of complex systems, the setup must be performed by an approved installer using the Installer’s Handbook.
Boiler Protection
P3
DHW
P4
84°C
61°C
CH
Target = 85°C
WaterMaster EZ Setup
Heating EZ Setup
DHW EZ Setup EZ Setup Reset Display EZ Setup
WaterMaster 25 - 35 - 45 - 70 - 85 - 120 : A1006482 - 664Y7300 • D
en
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FR
NL
ES
IT
DE
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USER’S GUIDE
WATER HEATER SETUP GUIDE
The main parameters of the WaterMaster water heaters can be set up using the EZ (easy) setup function
of the ACVMax controller. The EZ setup function allows the user/installer to quickly setup the appliance
for immediate operation according to the system conguration*.
General remarks
To navigate on the screen, use the UP, DOWN, LEFT and RIGHT keys, then the OK key
to validate a selection. A selection is marked by a black background under the selected
icon/text.
To increase/decrease values, use the UP and DOWN keys or the LEFT and RIGHT keys
according to the situation.
WHAT TO CHECK ON A REGULAR BASIS
Essential recommendations for the correct operation of the appliance
ACV recommends to check the system at least every 6 months as follows:
Check that the system water pressure is at least 1 bar when cold. If the pressure drops
below 0.7 bar, the built-in pressure sensor blocks the appliance until the pressure
exceeds 1.2 bar.
If it is required to top up the system to maintain the minimum recommended water
pressure, always turn the appliance off and only add small amounts of water at a time. If
a large amount of cold water is added in a hot appliance, the appliance can be damaged
definitively.
If the system needs to be refilled repeatedly with water, please contact your installer.
Check that there is no water on the floor under the appliance. If there is, please call your
installer.
If a condensate neutralisation system is installed, check it and have it cleaned regularly.
Check regularly that there is no error message (lockout) on the screen. A typical lockout
screen is explained on the previous page. Refer also to the Troubleshooting table below
or call your installer as required.
IN CASE OF PROBLEM...
Check the list of faults and corresponding codes below to get the solution(s). If no solution is provided here,
please contact your installer who will determine the correct solution by referring to”Locking codes” on page 47.
Fault
code Problem Possible Cause(s) Solution
-
The appliance does
not turn on when
pressing the ON/OFF
Master switch
No power supply
Check the power supply and that
the appliance power plug is con-
nected to the network.
E 01 Failed ignition The burner failed to light af-
ter 5 ignition attempts
Check gas supply to the water heat-
er.
E 13 Reset limit reached Resets are limited to 5 every
15 minutes
Turn unit OFF and ON to resume
normal operation.
E 34 Low voltage
Line voltage has fallen be-
low an acceptable operating
level
The water heater will automatically
reset once line voltage returns to
normal.
E 37 Low Water
Water pressure has fallen
below an acceptable oper-
ating level (0.7 bar)
Rell the system to reach a normal
range pressure. The water heater
will automatically reset once water
pressure returns to normal.
E 94 Internal Display Fault Display memory error Turn appliance o and on to re-
sume normal operation.
10


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