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4.6.5 SAFETY VALVE (fig. 14)
Connect a discharge pipe to the fixing jig connection and tighten.
The discharge pipe must have a continuous fall away from the appli-
ance to outside and allow any water to drain away thereby eliminat-
ing the possibility of freezing. The discharge pipe must terminate in
a position where any water – possibly boiling – discharges safely
without causing damage or injury, but is still visible.
4.6.6 CONDENSE PIPE
During normal operation the boiler produces condense which is
collected in a trap located in the lower part of the boiler. A flexible
pipe (condense outlet pipe) is connected to the outlet of the trap.
The flexible pipe must be connected to a plastic waste pipe only.
The plastic waste pipe must have a minimum of a 3è fall towards
the drain. Any external run of pipe should be insulated to prevent
the risk of freezing.
CONNECTING THE CONDENSATE OUTLET
Gently pull the condense outlet pipe down from its location inside the
boiler until it protrudes from the underside of the boiler. Connect a
suitable plastic (not copper) pipe (no less than 20 mm diameter) to
the outlet pipe and ensure it discharges in accordance with building
regulations or other rules in force (see fig. 15A for examples).
4.6.7 CONNECTING THE CONDENSATE OUTLET
Gently pull the condense outlet pipe down from its location inside
the boiler until approximately 100mm protrudes from the underside
of the boiler. Connect a suitable plastic (not copper) pipe (no less
than 20 mm diameter) to the outlet pipe and ensure it discharges in
accordance with building regulations or other rules in force.
4.7 ELECTRICAL CONNECTIONS
The electrical supply must be as specified in section 3/3A. A quali-
fied electrician should connect the electrical supply to the appliance.
If controls – external to the appliance – are required, a competent
person must undertake the design of any external electrical circuits,
please refer to section 8 for detailed instructions.
ANY EXTERNAL CONTROL OR WIRING MUST BE SERVED FROM
THE SAME ISOLATOR AS THAT OF THE APPLIANCE.
The supply cable from the isolator to the appliance must be 3-core
flexible sized 0.75 mm to BS 6500 or equivalent. Wiring to the appli-
ance must be rated for operation in contact with surfaces up to 90 °C.
4.7.1 CASING REMOVAL (fig. 15)
Remove transit screws C once the boiler has been mounted on
the wall.
To gain internal access to the appliance you must first remove the
casing, proceed as outlined below:
- locate and remove the screw A;
- remove the cover from the underside of the appliance casing;
- locate and remove the 2 screws B located at the Left & Right of
the underside of the casing;
- lift the casing upward to disengage it from the top locating hooks
and then remove;
- store the casing and screws safely until required. Re-fit in the
reverse order.
4.7.2 APPLIANCE TERMINAL BLOCK
The appliance terminal block is located on the rear of the control
fascia. Remove the casing as described in 4.7.1. Lift the control fascia
upward and lower it. Locate the terminal block covers (see fig. 16).
NOTE
The appliance comes with a factory fitted link to allow basic opera-
tion of the boiler via the mode selector switch. If it is anticipated that
external controls will be required please refer to the wiring diagrams
in section 8 for more detailed information.
4.7.3 CONNECTING THE MAINS (230V) INPUT (see fig. 17)
Locate and remove the screw securing the right terminal block cover
(230V). Pass the cable through the cable anchorage point.
Connect the supply cable wires (LIVE, and NEUTRAL) to their cor-
responding terminals on the appliance terminal block. Connect the
EARTH wire to the EARTH block (see fig. 17) ensuring that it's left
slightly longer that the others, this will prevent strain on the EARTH
wire should the cable become taut.
Do not remove the link wire unless additional external controls are to
be fitted (see section 8). The securing screw on the cable anchorage
should now be tightened. This must be done before the control fascia
is re-fitted in the upright position. The appliance casing, screws, and
lower cover can now be re-fitted.
Fig. 15A
C
Fig. 15
Optional de-
vices (24V) ter-
minal block
Fig. 16
ME3
Fig. 17
B
B
cover
A
Mains (230V)
terminal block
link
wire
ME6
15
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