0020238424_04 Betacom 4 Installation and maintenance instructions 35
12.13 Cleaning the heating filter
1. Drain the product. (→ Page 35)
2. Remove the temperature sensor (1).
3. Remove the upper clip (2).
4. Remove the lower clip (3).
5. Remove the flow pipe (4).
6. Remove the heating filter (5) and clean it.
7. Refit the components in the reverse order.
12.14 Installing the gas-air mixture unit
1. Install the burner.
2. Install the gas-air mixture unit.
3. Tighten the screws in a cross-wise pattern until the
burner flange fits closely and uniformly onto the mat-
ing surfaces.
– Tightening torque: 7 Nm, if a torque spanner is
available
4. Install the air intake pipe.
5. Install the flue pipe.
12.15 Draining the product
1. Close the service valves of the product.
2. Start check programme P.05 (→ Page 24).
Check programmes – Overview (→ Page 41)
3. Open the draining cock.
12.16 Checking the pre-charge pressure of the
expansion vessel
1. Drain the product. (→ Page 35)
2. Measure the pre-charge pressure of the expansion ves-
sel at the vessel valve.
Condition: Pre-charge pressure < 0.075 MPa (0.75 bar)
▶ Top up the expansion vessel in accordance with the
static height of the heating installation, ideally with ni-
trogen, otherwise with air. Check that the drain valve is
open when topping up.
3. If water escapes from the valve of the expansion
vessel, you must replace the expansion vessel
(→ Page 38).
4. Fill and purge the heating installation. (→ Page 27)
12.17 Completing inspection and maintenance
work
1. Fill and purge the heating installation. (→ Page 27)
2. Check the gas connection pressure (gas flow pressure).
(→ Page 28)
3. Check the CO₂ content. (→ Page 32)
4. If required, set the maintenance interval.
5. Check the product for tightness. (→ Page 29)
6. Install the front casing. (→ Page 16)
7. Fill out the relevant Service Record section in the
Benchmark Checklist located at the rear of this
document.
13 Troubleshooting
13.1 Rectifying faults
▶ If fault codes (F.XX) are present, refer to the table in the
appendix for advice or use the check programme(s).
Overview of fault codes (→ Page 46)
Check programmes – Overview (→ Page 41)
If several faults occur at the same time, the fault codes are
shown alternately on the display.
▶ Hold the button down for more than 3 seconds.
▶ If you are unable to clear the fault code and it reappears
despite several fault clearance attempts, contact cus-
tomer service.
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