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MHG Heating Ltd, Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey, KT20 5LR
P:0845 6448802 F:0845 6448803 E:
W: www.mhgheating.co.uk
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16.0 Routine Inspection and Servicing.(A QAA73 Room Unit/service tool is required to reset the
modules service interval timer.)
As with all Gas Appliances, we would highly recommended that a competent heating engineer
services the ProCon HT, at least every 12 months. This is assuming a normal daily usage of 8 –
10 hours.
If however the boiler is to be operated 24 hours a day, 7 days, we would recommend services
every 6 months
The ProCon HT boilers will display an E105 Error Code when 12 months has lapsed, indicating
that the appliance requires a Routine Service Inspection. This code will also be displayed on
the RVS43 143 cascade manager.
If the Installer/Commissioning Engineer is unable to undertake the Routine Service Inspection,
as detailed Section 16.1, please contact the MHGTechnical Department, who will be able to
arrange the Routine Service Inspection to be undertaken.
QAA73 Room Unit/Service Tool
A QAA73 Service Tool Suitable for use with ProCon HT & HTP Boilers is required to access the
operating and fault history of the modules.
The service tool is required to reset the Service Error code that appears on the module
displays.
A service tool can be obtained by contacting MHG Heating Ltd office.
16.1 Routine Service Inspection(E:105 Indication Reset via H630 bit 6 0-1)
Before commencing any service/maintenance work, the following tasks must be undertaken.
a)
Ask the end user about any problems with the operation of the boiler unit and note their
comments.
b)
Check the water pressure of the installation.
c)
Remove the boiler casing and visually inspect all pipe and water joints for signs of leakage.
d)
Inspect the top of the casing and the top of the heat exchangers for signs of water leakage
or ingress.
e)
Run the unit in Commissioning Mode HIGH FIRE; with the use of a flue gas analyzer record
the CO2 level. See section 15.2
f)
Run the unit in Commissioning Mode LOW FIRE; with the use of a flue gas analyzer record
the CO2 level. See section 15.2
g)
Listen to the sound of the combustion fan. Utilizing a QAA73 room unit/service tool if
available and theinstructions in Section 14.2, review the modules LMU Operating Error
Codes, and note therecorded codes onto the Service Report. (H700 – H722)
h)
Undertake a System Water Analysis to check the concentration level of the Water
Treatment, and note the level onto the Service Report.
i)
Check the flue route including the terminal position for conformity with prevailing
regulations, and trim back any foliage that may be around the terminal.
j)
Check the plant room/compartment ventilation system for conformity with
prevailingregulations.
k)
Check the Pressure (Safety) Relief Valve size, rating and orientation, for conformity with
prevailing regulations.
The results of the Inspections undertaken above must be acted upon, and all discrepancies
should be recorded on the Service Report and brought to the Client / End User’s attention.
Undertake any maintenance, and if necessary any preventative maintenance, that’s required.
