Glow-worm Energy Saver 80 - 100 and Gave Valve - Manual (Page 13)

13 221564F
5.1 Water Pressure
The maximum working pressure of the domestic hot water
circuit is 8 bar.
If the cold water supply pressure exceeds the maximum, a
pressure reducing valve must be fitted in the supply to the boiler.
5.2 “Hard” Water Areas
The temperatures within the heat exchanger are limited by the
boiler control system to minimise scale formation within the hot
water pipework. However, in areas where the water is “hard”
(i.e. more than 200mg/litre), it is recommended that the hot
water setting is adjusted from to (see section 11.8 and
diagram 11.4) and that a scale reducer is fitted.
Refer to the manufacturer’s instructions or consult the local
water company for additional advice.
5.3 Domestic Water Flow Rate
The water flow rate is governed to a maximum 12 litre/min by a
restrictor fitted into the boiler pipework.
5.4 Mixing Valve
There is a domestic hot water mixing valve fitted to the boiler
base and this is factory set at approximately 60
O C. This can be
adjusted if necessary to supply a lower temperature. Turn the
5mm adjuster anticlockwise to reduce the temperature, see
diagram 14.7. The domestic hot water temperature can also be
adjusted, see section 11.8.
6 Installation Preparation
6.1 Wall Mounting Pack
The wall mounting pack contains everything required to pre-
plumb the boiler, including the wall mounting jig, hanging
bracket, wall template, screw pack, room thermostat and safety
valve discharge pipe, along with these instructions.
6.2 Wall Template
Remove the wall template from the wall mounting pack and
place in the desired position on a flat wall, giving due consideration
to boiler clearances, see section 2.
6.3 Flue Hole Cutting
The
standard horizontal flue is designed with an internal fall
of 35mm/metre towards the boiler for disposal of condensate.
If the standard flue length alone is being used then the flue hole
of diameter 105mm can be cut in the position marked on the wall
template.
For
standard side flues the horizontal flue centre line on the
wall template should be extended to the side wall, and the
vertical centre of the flue hole marked at 208mm from the back
wall.
For installations with external access, a 105mm diameter core
drill can be used.
For installations with internal access only a 125mm diameter
core drill should be used.
When using extension pipes with the horizontal rear flue, a core
drill size of 125mm should be used to allow the extension pieces
to slope at 35mm/metre (2.5
0 ) towards the boiler.
For
extended side flues , the flue hole centre should be
determined by extending the dashed inclined line on the template
to the side wall. This dashed line is drawn at 35mm/metre (2.5
o )
rise from the boiler. Where this line reaches the side wall, a
horizontal line should be marked. The vertical centre line of the
flue should then be marked at 208mm from the back wall, see
diagram 6.1.
5 Domestic Hot Water System
To allow for the flue passing through the wall at this angle a
125mm hole should be drilled irrespective of internal or external
installation.
If necessary remove the wall template whilst drilling the flue
hole.
6.5 Wall Mounting Jig and Hanging Bracket
Fixing
If previously removed, reposition the wall template over the flue
hole and mark the position of the fixing holes for the jig and the
hanging bracket.
Drill the four fixing holes using a 7mm dia. drill bit and insert wall
plugs supplied.
If gas and/or water pipes are to be plumbed through the rear wall
directly into the wall mounting jig holes, the holes must be drilled
as marked on the wall template prior to fixing of the wall
mounting jig.
Secure the wall mounting jig and hanging bracket using the
screws and washers supplied, see diagram 6.2.