RVR Energy Technology MICROMAT EC 45, Instruction For Usage, Installation & Commissioning, Page: 13 / 56

E n e r g y T e c h n o l o g y
Ltd.
13
11.0 condensate
connection
12.0 flue/combustion
air connection general
If any part of the condensate pipe is to be run external to the building or is at risk of freezing, then the pipe must
be suitably insulated to protect from freezing.
If a suitable drain for accepting the condensate is not available nearby to, and below the boiler (e.g. boiler installed
in a basement below ground level location), then a suitable condensate sump receptacle with a discharge pump
should be installed below the boiler to remove the condensate to a remote drain.
When making the condensate pipe connection to the boiler, do not use adhesives, it is recommended to
lightly apply a suitable jointing tape (PTFE or similar) and use only light pressure to connect fittings to the
appliance to avoid damage to the condensate outlet assembly.
It is recommended that the condensate pipework should include a method of disconnection and cleaning points.
The flue connection and combustion air inlet to the appliance are located on the top of the appliance see fig 6. These
connections are arranged concentrically with the 70mm flue gas connection centrally within the 125mm air inlet
connection.
There are two options for flueing the MICROMAT EC boiler.
i) Conventionally, using flue gas tube only and air for combustion from the room or compartment in which the
appliance is installed. If using a conventional flue arrangement then the room or compartment must be ventilated
in accordance with the requirements of BS 6644 or BS5440 as appropriate. For guidance on ventilation see
section 16.
ii) Room sealed using concentric 70/125 components where air for combustion is taken from outside of the
building. When using a room sealed flue, whereas air for combustion is provided from outside of the building
directly to the appliance, ventilation to a compartment may still be required - See section 16 for general space
cooling.
Multiple Boilers
For detail and advice on common flues serving multiple boilers, contact RVR Ltd.
Important Note
Where the MICROMAT EC is to be installed in an application where the combustion air is likely to be contaminated
with oxidising agents, such as swimming pool areas, special industrial processes etc, then the appliance must be
room sealed.