16
Grant Vortex Outdoor Module
Flow connection - All models
A 22 mm (28 mm 26/36 and 36/46 models) Tectite
push-fit elbow connection is provided for the heating
flow. The flow and return pipework can exit the boiler
enclosure either through the openings provided in both
sides (under the movable cover plates) and through the
wall when installed against the building, or down and
through the openings provided in the base of the
enclosure for 'free standing' installations.
Return connection (see also Section 5.4) - All models have
a stainless steel pipe on the left hand side (when viewed from
the back) for the return connection - 22 mm for the 15/26
models or 28 mm for the 26/36 and 36/46 models.
Compression fittings must be used for the return connection.
All water connections have been temporarily sealed
with plastic caps to prevent any residual water (from
factory pressure testing) leaking from the boiler during
storage and transit. All the caps must be removed
before connecting any fittings.
Plug all unused connections.
Fit drain cocks in the central heating and domestic hot
water systems to allow the complete system to be fully
drained.
To avoid the danger of dirt and foreign matter entering
the boiler the complete heating system should be
thoroughly flushed out - before the boiler is connected
and then again after the system has been heated and is
still hot. This is especially important where the boiler
is used on an old system.
For optimum performance after installation, this boiler and its
associated central heating system must be flushed in accordance
with the guidelines given in BS 7593:1992 'Treatment of water
in domestic hot water central heating systems'.
This must involve the use of a proprietary cleaner, such
as BetzDearborn's Sentinel X300 or X400, or Fernox
Restorer. Full instructions are supplied with the
products, but for immediate information, please
contact BetzDearborn on 0151 4209563 or Fernox on
0179 9550811.
For Long term protection against corrosion and scale,
after flushing, it is recommended that an inhibitor such as
Betzdearborn's Sentinel X100 or Fernox MB-1 is dosed
in accordance with the guidelines given in BS 7593:1992.
Failure to implement the guidelines will invalidate the
warranty.
4 - GENERAL BOILER INFORMATION
Water connections
4.11
Boiler components
4.12
Fig. 8 - Top view
Fig. 9 - Rear view
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