Supplied By www.heating spares.co Tel. 0161 620 6677
10
221481C
2763
TOP FIXING HOLES
228
BOTTOM
FIXING
HOLE
281
186
332
220
46
PREPARED
HOLE IN
WALL
BOILER
Diagram 4.1
BOILER FIXING DIMENSIONS
C
L
3 Water Systems
3.7 Cylinder
SINGLE FEED INDIRECT CYLINDERS ARE NOT SUITABLE.
The hot water cylinder must be of the indirect coil type. It must
be suitable for working at a gauge pressure of 0.35bar above
the safety valve setting.
3.8 Water Make Up
Provision must be made for replacing water lost from the
system. A make up vessel mounted above the highest point of
the system and connected through a non-return valve to the
system on the return side of either the hot water cylinder or
system.
Alternatively, provision for make up can be made by using a
filling loop.
3.9 Filling Sealed Water Systems
Provision for filling the system at a low level must be made.
Three methods of filling are shown in diagram 3.4. There must
be no permanent connection to the mains water supply, even
through a non-return valve.
METHOD 1
METHOD 2
METHOD 3
SUPPLY STOP
VALVE
SUPPLY
PIPE
HOSE
UNIONS
SERVICING
VALVE
TEMPORARY
HOSE
HEATING
SYSTEM
HEATING
SYSTEM
TEMPORARY
HOSE
HOSE
UNIONS
SERVICING
VALVE
SUPPLY
PIPE
SUPPLY STOP
VALVE
DOUBLE CHECK
VALVE ASSEMBLY
HEATING
SYSTEM
SERVICING
VALVE
SUPPLY
STOP VALVE
SUPPLY
PIPE
HOSE
UNIONS
DOUBLE CHECK
VALVE ASSEMBLY
OVERFLOW
CISTERN
COMBINED
CHECK VALVE
AND VACUUM
BREAKER
PRESSURE
REDUCING
VALVE
FILLING SEALED
WATER SYSTEMS
Diagram 3.4
3132
4 Flue and Appliance Preparation
4.1 Positioning
Place the template, provided, on the wall in the required position
and mark location of the balanced flue hole, see diagram 2.1.
Cut the hole in the wall to accept the wall liner, see diagram 4.1.
Make good any plasterwork at this stage. When dry, select the
liner “G”, see diagram 4.2. Push into the hole until the flange is
flush with the internal wall. Fit the liner “B” from inside so that it is
flush with the outside brickwork. Mark the two liner positions and
remove. Align the marks on the liners and tape them together with
the tape provided.
The wall liner “B” is not required for wall thickness less than length
of duct “G” on the short flue set. For lesser wall thickness than duct
“G” cut the plain end to the required length.
Reposition the template on the wall in line with the wall opening,
or see diagram 4.1.
Mark positions for the three fixing screws.
Drill and plug the fixing holes, suitable for No.10x50mm wood
screws and plugs.