Ref. 3:
The OFFSET
setting of the
gas valve is set at
the factory and
sealed.
It cannot be
modified.
2
1
3
COMMISSIONING THE SYSTEM
The DHW tank (secondary) must be filled and pressurised
before filling and pressurising the heating circuit
(primary).
The two circuits, DHW and heating, must be filled prior to
using the appliance.
- Fill the tank slowly and bleed it by opening the hot water outlet. Bleed
all the outlets and make sure there are no leaks in the domestic hot
water system.
- Fill the whole system up to a minimum of 1.5 bar using the boiler fill
valve.
Fill the system slowly. Also check that the automatic bleed valve is
working. Make sure there are no leaks in the central heating system.
- Purge the charging pump and check that it rotates.
- Open the gas valve, bleed the pipe and check for leaks in the system.
- Ensure the condensate trap is correctly fitted underneath the boiler.
- Connect the power cable to the boiler via the terminal provided and
switch on the appliance. Where appropriate, put the room thermostat
at its highest setting so the boiler starts up.
- Check the gas pressure and leave the boiler to heat for a few minutes.
Switch the boiler to maximum power mode and check the CO
2
.
(See
technical data table)
.
Then switch the boiler to minimum power mode and check the CO
2
.
(See technical data table)
.
- Set the central heating and hot water temperatures according to the
values indicated in the instructions for use.
- Bleed the central heating system again and if necessary fill to reach
the desired pressure.
- Make sure that the central heating system is properly balanced and, if
needed, adjust the valves to prevent certain circuits or radiators from
getting a flow rate that is far above or below the set rate.
The diameter of the condensate discharge pipe cannot be
reduced. The pipe must never be obstructed.
CHECKING THE SETTINGS
Specific regulation in Belgium for the HeatMaster®
25 / 35 TC : the CO
2
, gas flow, air flow and air/gas supply
parameters are factory preset and cannot be changed.
- Check if the parameters are set to meet the user’s requirements.
- The boiler’s settings can only be checked by a trained ACV
installer or the ACV maintenance department.
- Switch the appliance to maximum power mode by pressing
simultaneously on the Mode and Plus (+) keys.
- Check the dynamic gas pressure at the gas valve
(See diagram below,
ref. 1)
. This must be at least 18 mbar.
Let the appliance heat for a few minutes until it reaches at least 60°C.
Check the CO
2
setting of the appliance using a measuring instrument.
The optimum value is indicated in the technical data table. To
increase the CO
2
value, turn the venturi screw anticlockwise, and turn
it clockwise to decrease this value (see diagram below, ref. 2).
Then switch the appliance to minimum power mode by pressing
simultaneously on the Mode and Minus (-) keys. Let the appliance
stabilise for a few minutes.
Check the CO
2
value. It should be either equal to the value at full
power or a maximum of 0.5% less than it. If you observe a significant
deviation, please contact ACV’s maintenance department.
BOILER MAINTENANCE
ACV recommends that you have your boiler inspected,
and cleaned, if necessary, at least once a year.
Disconnect the electrical power supply before undertaking any work
on it.
- Check that the condensate trap is not clogged, fill it as required and
check for leaks.
- Check that the safety valves are in good working order.
- Bleed the complete system and refill to 1.5 bar if necessary.
In the case of repeated fills, contact your installer.
- Check the boiler’s pressure in maximum power mode.
If this value is very different from the original setting it may indicate
an obstruction in the air intake ducts or flue gas exhaust pipes, or that
the exchanger is clogged.
TEMPERATURE SENSOR RESISTANCE TABLE
T° [°C]
R Ω
T° [°C]
R Ω
T° [°C]
R Ω
– 20
98200
25
12000
70
2340
– 15
75900
30
9800
75
1940
– 10
58800
35
8050
80
1710
– 5
45900
40
6650
85
1470
0
36100
45
5520
90
1260
5
28600
50
4610
95
1100
10
22800
55
3860
100
950
15
18300
60
3250
20
14700
65
2750
COMMISSIONING AND MAINTENANCE
EN • 20
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