RVR Energy Technology MICROMAT EC 45, Instruction For Usage, Installation & Commissioning, Page: 12 / 56

E n e r g y T e c h n o l o g y
Ltd.
12
10.0 system flow
& return connections
11.0 condensate
connection
Note The MICROMAT EC boiler must only be installed on sealed and pressurised systems. The maximum working
pressure of the boiler = 3 bar. A safety valve set to 3.0 bar is supplied with the boiler and must be installed onto
the flow pipe adjacent to the boiler. It is recommended that the final working pressure (hot) of the system does not
exceed 2.3 bar.
The boiler is equipped with 2 sets of 1
1
/
4
” BSP Male flow & return connections which are located top rear L/h side
& bottom rear L/h side. See figs 3&4.
The installer may choose to use both top connections or both bottom connections or one of each (e.g. flow-top,
return-bottom). The appliance is supplied complete with 2Nr 1
1
/
4
” x
1
/
2
” BSP reducing sockets (see fig 3. item A)
which may be used either at the top of the appliance (when flow and return connections are made to the lower boiler
connections) to install air vents or be used at the bottom flow and return connections (when system connections
are to the top of the appliance) to install drain cocks.
The appliance is supplied with 2Nr 1
1
/
4
” x 1
1
/
4
” x
1
/
2
” BSP Tees (see fig 4. item B) which may be used to connect
the supplied safety valve into the flow pipe adjacent to the appliance and either a system filling point/expansion
vessel or a drain cock.
The flow and return pipework should include isolation valves and a method of disconnection local to the boiler
The condensate connection is located at the underside rear of the appliance see fig 5.
The condensate syphon cleaning point is factory fitted with a heavy grade black plastic cap which MUST NOT BE
REMOVED (see fig 5) apart from routine maintenance cleaning operations and must be in place whenever the
appliance is in operation. WARNING. Operating the appliance with the cap removed from the syphon cleaning point
will cause products of combustion to be discharged from the cleaning point.
The condensate connection is a
3
/
4
” BSP Male threaded stub fabricated from plastic.
The installer must connect to this stub, a condensate pipe fabricated from plastic tube and fittings (
3
/
4
”, 22mm,
overflow pipe is considered suitable). Copper tube must not be used for the condensate pipe! The condensate
pipe must fall continuously from the appliance to a suitable nearby drain.