Cleaning The Heat Exchanger; Checking And Adjusting The Gas/Air-Ratio; Function Check In Operating Conditions; Service Record Log Book - Worcester GB162-50 Installation And Servicing Instructions

Maintenance

13.2.7 Cleaning the heat exchanger

CAUTION: Damage to the installation.
▶ Do not use metal brushes or similar hard cleaning
tools.
CAUTION: Damage to the installation due to faulty glow
ignitor.
The glow ignitor is made from fragile ceramic material.
▶ Do not damage the glow ignitor.
▶ Check the bottom and top sides of the heat exchanger for dirt.
CAUTION: Damage to the installation due to dirt
particles.
▶ Cover up the boiler interior, e. g. using a blanket or a
cover.
▶ Clean the heat exchanger with compressed air or a soft brush.
Fig. 117 Cleaning the heat exchanger
CAUTION: Damage to the installation due to undesired
flue gas or condensate leakage.
▶ When installing the condensate collector, make sure
that the 2 snap closures close smoothly. If this is not
the case, the seal between the condensate collector
and the flue pipe at the back of the heat exchanger
may be leak.
Needs-oriented maintenance activities
1. Cleaning the burner, heat exchanger and condensate
trap after shutting down the heating system.
2. Checking and adjusting the gas/air ratio:
• CO content at full load
2
• CO content at part load.
2
3. Function testing.
4. Confirming proper maintenance.
Table 21
52
▶ Refit the condensate collector.
▶ Connect the flexible condensate drain hose to the condensate
collector.
▶ Re-install the condensate trap.
▶ Rinse the heat exchanger with clean water.
▶ Reassemble all boiler components in reverse order:
– Burner with burner seal
– Burner cover with fan and gas valve
– Gas valve
– Glow ignitor and ionisation electrode.
▶ Start up the boiler ( chapter 10 "Commissioning", page 37).
13.3
See section 10.2.7 "Checking and adjusting the gas/air-ratio", page 41.
13.4
▶ Slowly open the gas valve by pushing on the gas valve and turning it
¼ rotation in an anticlockwise direction ( fig. 79, page 39).
▶ Switch on the heating system by pressing the mains switch of the
BC10 basic controller [1].
▶ Set the maximum CH flow temperature dial [8] and the DHW
temperature dial [10] to the maximum temperatures.
▶ Enter a heat demand via the control unit and check that the boiler
starts the heating mode.
▶ Open a hot water tap and check that the boiler starts the DHW mode.
▶ Set the maximum CH flow temperature dial [8] and the DHW
temperature dial [10] to the required temperatures.
6 720 648 726-118.1TD
Fig. 118 BC10 basic controller
13.5
Complete the log book while carrying out needs-oriented maintenance.
▶ Enter your signature and the date after completing the maintenance
activities.
Date: Date:
Page _____________ _____________
 
49
41 __________ Pa __________ Pa
__________ % __________ %
__________ % __________ %
 
52
Company stamp/ Company stamp/
signature/date signature/date

Checking and adjusting the gas/air-ratio

Function check in operating conditions

10 9
888
11
2 3 4
1
1

Service record log book

Date: Date:
_____________ ________
 
__________ Pa __________ Pa
__________ % __________ %
__________ % __________ %
 
Company stamp/ Company stamp/
signature/date signature/date
8
5
7
6
6 720 648 726-069.1TD
Date:
________

__________ Pa
__________ %
__________ %

Company stamp/
signature/date
6720813171 (2015/04)