25
DOWN DRAUGHTS
However well designed, constructed and positioned, the
satisfactory performance of the flue can be adversely
affected by down draught caused by nearby hills, adjacent
tall buildings or trees. These can deflect wind to blow directly
down the flue or create a zone of high pressure over the
terminal.
A suitable anti-down draught terminal or cowl will usually
effectively combat direct down blow but no cowl is likely to
prevent down blow due to high pressure zone. Ensure that
any cowl used will not restrict the flue exit, or cause excessive
back draught. (See
)
WATER PIPE SIZE
The flow and return pipe must be 28mm diameter. Care
should be taken to ensure that the heating system is
correctly installed and that it complies with all relevant
codes of practice. If this appliance is being connected to an
existing system, we strongly recommend that you engage an
appropriately qualified person to check the following:
a.
That the system is sound.
b.
That pipework is adequately insulated (where
applicable).
c.
Check all controls, i.e. pump, motorised valves, time
control etc. are operating satisfactorily and are
compatible with the requirements of the cooker.
d.
Are any modifications necessary to make the heating
system more efficient?
e.
Cleanse the system and add suitable inhibitor. The
use of motorised valves, room thermostats, radiator
thermostatic valves, domestic hot water controllers,
etc, can greatly enhance a heating system and we
recommend their use.
Only competent personnel should be employed to carry out
your heating installation.
The flow and return can be taken either side of the cooker
1.
To take off from the left simply connect directly onto the
exposed boiler connection.
2.
To take off from the right side:
a.
Remove the two blanks on the right hand side of the
cooker. Then remove the two cover plates from the
cooker’s back panel.
b.
Remove the plugs from the boiler connections. To
avoid insulation from going into the flow and return
ports, cover with insulating tape.
c.
Using copper pipe, punch out a passage way through
the insulation material to the boiler connections.
Clear any insulation away from the boiler
connections.
d.
Before passing the flow and return pipes through the
cooker, cover the ends with tape to avoid insulation
entering them.
Fig. 8.8
Fig. 8.9
Fig. 8.10
DESN 517992
DESN 517990
DESN 517991