Chaffoteaux & Maury MINIMA MX2 24 FF NG User Manual

25
PRESSURISING (Fig. 32)
Domestic Hot Water Circuit:
- open the cold water tap 34
- open all hot water taps until water flows
Central Heating Circuit:
- Open flow and return valves on the boiler 31 and 35
- Loosen the cap on the automatic air vent
- Open filling taps
36 and 37, and vent the radiators.
- Set the system pressure, close filling taps
36, 37 and
remove filling loop 38.
- Check for leaks.
- Manually check pump is free to turn
Gas circuit
- open the gas tap 33
- purge the gas circuit
- test the gas circuit for soundness
15
Operating
Fig. 32
31
33
34
35
16
SETTINGS
The boiler is supplied with all the dip switches OFF (Fig. 33) and the potentiometers turned fully anti-clockwise. It is possible
to adjust these settings as required.
In this case, it is necessary to access the electronic control unit.
Switch the power on, remove the casing and open the control unit by pressing the two side locking pins P (Fig. 29). The
setting buttons are on the circuit board behind the blanking cover E (Fig. 30)
-
A1 allows the Heating Anti-cycle Timing (HAT) to be set to 30 seconds or 3 minutes
HAT: Prevents the burner from relighting for the time set (30 seconds or 3 minutes) once the central heating circuit
has reached the temperature set on the Central Heating temperature knob
22 (Fig. 1).
- A2 reserved
- A3 to fix the heating temperature setting to 40°C whatever the setting of the Central heating temperature knob 22 (Fig. 1)
-
A4 enables operation either in modulating heating mode, or on/off mode
- B1 reserved
- B2 reserved
-
B3 allows the hot water flow switch timing to be adjusted to 0 or 1.5 seconds
- B4 reserved
Note: after a power cut-out or board reset, the HAT is cancelled for 3 minutes.
-
P1: potentiometer to range rate the Central heating output (see table on page 26)
- P2: potentiometer enabling soft-light ignition (factory set at: 12.7 kW - MX2 24 FF and 16 kW - MX2 30 FF)
- P3: reserved
Once adjustments have been made, replace the blanking cover
E (Fig. 30), close the control unit cover and refit the casing.
36
37
38

Chaffoteaux & Maury MINIMA MX2 24 FF NG Specifications

General

Brand	Chaffoteaux & Maury
Model	MINIMA MX2 24 FF NG
Category	Boiler
Language	English