Ideal Boilers mini HE C24, Установка и обслуживание, Страница: 20 / 60

INSTALLATION
mini HE --- Installation & Servicing
20
20 CONDENSATE DRAIN
Refer also to the British Gas document: “Guidance Notes
for the installation of Domestic Gas Condensing Boilers”
(1989).
The condensate drain provided on the boiler must be
connected to a drainage point, preferably within the building.
The boiler includes a trap that prevents combustion products
entering the drain. However an additional trap with a seal of at
least 75 mm and an air break between the traps is required if
the condensate drain pipe is connected to sanitary pipework.
Condensate drain
Additional trap
The length of the condensate pipe should be kept at
minimum and must be arranged so that obstruction (e.g.
through freezing) of external drainage pipework does not give
rise to spillage within the dwelling.
If a part of the drainpipe runs externally this part should be
kept as short as possible and protected to reduce the risk of
freezing.
IMPORTANT
If excessive external pipework cannot be avoided an
additional condensate removal pump (available as an
option) and insulation are recommended to prevent possible
freezing.
The drain outlet on the boiler is a 25 mm o.d. plastic pipe.
This size must not be reduced below 21.5mm o.d. (standard
overflow pipe) in any part of its length.
All pipework and fittings in the condensate drain system must
be made of plastic. No other materials may be used.
To avoid condensate being trapped:
--- the drainpipe should be run with a fall of at least 2.5° (45
mm/m) away from the boiler;
--- the number of bends and joints should be kept at
minimum;
--- the drainpipe should be adequately fixed to pevent pipe
sagging.
21 ELECTRICAL CONNECTIONS
Warning. This appliance MUST be efficiently earthed
A mains supply of 230 V ~ 50 Hz is required.
Mains wiring should be 3 core PVC insulated flexible cord
NOT LESS than 0.75 mm
2
(24 x 0.2mm) and to BS. 6500,
Table 16. (0.5mm
2
flex is not acceptable --- for mechanical,
not electrical reasons.)
Mains wiring external to the boiler MUST be in accordance
with the current I.E.E. (BS7671) Wiring Regulations and any
local regulations.
For Ireland reference should be made to the current ETCI
rules for electrical installations.
The supply connection is intended to be made via a double
pole switch having a 3 mm (1/8”) contact separation in both
poles, serving only the boiler and system controls. A 3 pin
UNSWITCHED socket may, alternatively, be used.
The fuse rating should be 3 A.
For external controls wiring see frame 25.
Note: the switch contacts of any external programmer,
room or frost thermostat must be volt free.
Connecting a switched live feed to external controls
terminal block may be dangerous and will result in
serious damage to the boiler.
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