19
INSTALLATION
COMMISSIONING
Please make sure the system is full of water and all isolation valves are open before turning the power on to the boiler.
When power is first applied, the boiler will proceed to heat the internal cylinder to 75 Degree C. This is a one-off process when
the boiler is turned on for the first time.
If at the time of this pre-heat the boiler displays any information codes, please see the information codes chart on page 9.
The most likely problem will be due to air in the system and the code on the display will be F6.
Please confirm the code by pressing the Confirm button and let the boiler go through the initial pre-heat again.
Set the pump to speed 1 by pressing the pump speed selection button on the pump, make sure the auto air vent on the pump is
open and allow the boiler to continue with the pre -heat.
If the boiler displays further information codes it might be necessary to remove the valve head from the motorised valve body
by turning the fixing nut anti clockwise until loose and then gently easing the head from the valve body.
The valve can then be manually turned anticlockwise from the 3 O’clock position, 90 degrees to the 12 O’clock position when air
can be heard at the pump. This will allow the air to be released into the heating system. Once the air has passed through the
boiler the valve can be turned back to the 3 O’clock position. This process might have to be repeated several times to remove
the air. It is important to maintain a system pressure of 1 – 1.5 Bar whilst the boiler is in pre-heat mode.
If the boiler displays the F1 code (Overheat) it will be necessary to remove the white panel to
expose the circuit boards and disconnect the relay board from the main circuit board by separating
the white plug. The boiler will now operate but not produce any heat. Continue with the air removal
until satisfied.
Once the pre-heat is complete the boilers internal DHW programmer can be set, please see page 8 for details.
You can set 3 ON/OFF times with cylinder temperatures. The Timer must be set to ON and the current time and day must be set.
It is recommended that the cylinder be set to 75 Degree C to obtain the maximum performance from the boiler.
The blending valve supplied, which
MUST
be fitted, can be set between 30 degree C and 50 Degree C.
It is recommended the DHW flow rate be no greater than 10 l/min and can be regulated using the flow restrictor provided.
Once the initial pre-heat is complete the heating can be turned on using the provided Wi-Fi thermostat or other programmable
volt free room thermostat fitted.
Once the boiler has a call signal, indicated by TC on the boiler display, the boiler will run in heating mode until either the call
signal is removed, or the internal cylinder drops in temperature and the boiler is in a timed-on period for DHW. The boiler works
on a Hot water priority basis. When the boiler sees a drop in cylinder temperature the boiler will heat the cylinder to the set
target temperature providing the boiler is in a Hot water timed on period set by the internal programmer.
While the boiler is working in Heating mode the heating flow temperature can be set by using the up and down arrows on the
boiler display, press confirm button to store the required set temperature.
Please fill in the commissioning Report form found on Page 24. Failure to do so could invalidate the warranty.
Summary of Contents for Aztec Classic WM Maxi Combi
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