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NOTE: If this appliance is to be installed in other than a single domestic dwelling ie. in an apartment block or student flats
etc., the hot and cold water system will need to be disinfected in accordance with BS_EB 806:4 2010 section 6.3 and the
Water Regulations.
Because the Gabarrón Mattira combi boiler cylinder is stainless steel, the use of chlorine as the disinfection agent can cause
damage unless the appliance is adequately flushed and refilled with the mains water immediately on completion of the
disinfection procedure.
Damage caused through a failure to do this adequately will not be covered by the warranty.
IMPORTANT - DRAIN DOWN PROCEDURE
1. Switch off both the boiler and the immersion heater
2. Open the nearest hot tap and run all hot water until cold, then close it
3. Close the incoming cold main at the stop tap
4. Hold open the pressure and temperature relief valve until water stops discharging into the tundish and leave it open
5. Open the cold taps starting from the highest point and working down to the lowest tap, leaving them open
6. When the cold taps have stopped draining, open the hot taps starting from the highest and working down to the lowest
tap
7. Any water remaining in the internal cylinder can then be removed via the cylinder drain point inside the boiler housing
Commissioning
For the reasons mentioned, we recommend the use of a non-chlorine based disinfectant when carrying out disinfection of
systems incorporating these appliances.
Remove the filter from the combination inlet group clean and replace. Refill the system and open all hot taps until there is no
air in the pipe work. ENSURE CYLINDER IS DRAINED PRIOR TO CHECKING OR REMOVING FILTER FROM THE
COMBINATION INLET GROUP.
Allow the cylinder to heat to normal working temperature, and check again for leaks. The pressure relief valve or the P&T
valve should not operate during the heating cycle. If the P&T valve operates before the pressure relief valve due to high
pressure, check that the inlet control group is fitted correctly.
The boiler/heating systems should be filled and commissioned in accordance with good practice following the guidance in BS
7593:2006/the boiler manufacturer’s instructions. This includes adequately flushing the system to remove any debris that may
have been introduced during installation/maintenance.
NOTES
At the time of commissioning, complete all relevant sections of the
Checklist
located on the inside back pages of this
document.
This must be completed during commissioning and left with the product to meet the Warranty conditions offered by
Elnur UK Ltd.
Your Gabarrón Mattira combi boiler incorporating an unvented cylinder is automatic in normal use, but requires routine
maintenance which is normally carried out at least annually along with the boiler service.
The maintenance must be carried out by a suitably competent tradesperson who is qualified to work on unvented cylinders.
The checks/work needed are listed in the maintenance part of these Instructions.
During commissioning the actual temperature that the cylinder reaches when the thermostat(s) operate should be tested and
adjusted so that it achieves a minimum of 60°C, in order to comply with the Legionella pasteurization requirements.
When initially opening the taps, a small surge in flow may be experienced, which disappears as the pressure in the system
stabilizes. This is quite normal with these types of systems and does not indicate a fault.
In some areas the water will initially appear cloudy, but will quickly clear when left to stand. This is nothing to be concerned
about and is due to aeration of the water.
