12
xtra
-
Installation & Servicing
INSTALLATION
9
CONDENSATE DRAIN
The condensate drain must be connected to the
condensate bulk head connector on the back of
the boiler and then connected to a drainage
point, preferably within the building.
The pipe size from the condensate connector on
the lower rear panel is 21.5mm.
The routing of the drain must be made to allow
a minimum fall of 1 in 20 away from the boiler,
throughout its length.
IMPORTANT.
Any external runs must be kept to a
minimum and insulated. This is to avoid
freezing in cold weather causing blocking.
All pipework and fittings in the condensate drain
system must be made of plastic. No other
materials may be used.
10 BOILER WATER CONNECTIONS
The boiler flow and return pipes are terminated with 2" BSP
male taper threads at the rear of the appliance. Water
returning from the system should be connected to the lower
pipe, with the flow water connection coming from the top pipe.
Refer to Frame 1.
Plastic plugs fitted on the open ends of the flow and return
pipes must be removed before connecting the system
pipework.
An air vent must be provided immediately after the flow
connection.
If installing the boiler onto an existing system it is strongly
recommended that the system be thoroughly flushed
before connecting the boiler. When connecting to a new
system it is still important to flush the whole system in
accordance with the relevant standards.
11 FROST PROTECTION
The boiler has built into its control system the facility to protect
the boiler only against freezing.
If the boiler flow temperature T
1
, falls below 7
o
C the pump will
be activated without the boiler firing.
If the flow temperature falls below 3
o
C the boiler will fire at
minimum rate until the flow temperature exceeds 20
o
C and
the return temperature exceeds 5
o
C. The pump will stay
running for a further 15 minutes.
Central heating systems fitted wholly inside the building do
not normally require frost protections as the building acts as
a 'storage heater' and can normally be left at least 24 hours
without frost damage. However, if parts of the pipework run
outside the building or if the boiler will be left off for more than
a day or so, then a frost thermostat should be wired into the
system, see Frame 19.
Bulkhead Connector
INST
ALLA
TION
Содержание F80
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