Rendamax R2000 Series, Technical Documentation Manual

Page: 43 / 52

DOC2012/2000en
Before using chemicals and cleaning agents in the boiler, please contact your supplier for advise.
Always read the instructions on the bottle of the cleaning agents before using them.
Heat exchanger (external cleaning)
Remove the baffles before cleaning the heat exchanger.
-
Use compressed air when the heat exchanger is lightly soiled
- Use a stiff brush and soap when the heat exchanger is very dirty, do not allow the
refractory brick-work to get wet.
NB.
The heat exchanger may become heavily soiled (soot for example), when the instructions are
not followed properly.
This may be caused by:
- insufficient ventilation
-
condensate on the heat exchanger.
If this is the case, clean the complete heat exchanger, including the baffles.
Furthermore, the cause of the problem should be ascertained and rectified.
Heat exchanger (internal cleaning)
Descale the heat exchanger with suitable chemicals.
Filter inspection
When the pressure loss over the gas regulator gets too high, the burner pressure will decrease noticeably.
A dirty gas filter may be the cause. The filter should be inspected at least once every year.
To allow access to the filter element, first remove the side cover of the gas regulator assembly.
Then remove the filter and replace it if necessary. Replace the cover and check for leaks.
8.4 Cleaning
43
WARNING: ONLY COMPETENT PERSONS SHOULD CARRY OUT SERVICING ON THIS BOILER IN
ACCORDANCE WITH THE GAS SAFETY (INSTALLATION AND USE) REGULATIONS 1984.
Ensure that both gas and electrical supplies are switched off before carrying out any service
operation.
After carrying out any service operation it is important to check for gas soundness and re-commission
the boiler as described in Section 6 - Commissioning.
Ensure that any panels covering live connections are replaced securely upon completing any
service operation. Wiring diagrams and components lists are supplied separately.
Routine maintenance
The frequency of routine maintenance depends on the use and environment in which the boiler is used
although it must be carried out at least annually.
The scope of routine maintenance includes the following:
I
Cleaning the heat exchanger
II Cleaning the burner assembly and inspect the condition of the burner and ignition components
III Checking the gas train for soundness
IV Inspecting the adjustment of the air damper and operation of the modulating gas valve and
servo-motor
V Checking the effectiveness of natural or mechanical ventilation
VI Inspecting the flue system including terminal, for damage and ensure it is evacuating the
products of combustion without any leakage or spillage
VII Check gas pressure settings, safety lock-out systems and water flow switch
VIII Inspect condition of refractory lining.
8.5 Servicing
E