Pipework Materials; Connections; Preparation For Installation - Grant Vortex Series Installation And Servicing Instructions

4.5 PIPEWORK MATERIALS

The Grant Vortex boiler is compatible with both copper and plastic
pipe. Where plastic pipe is used it must be of the oxygen barrier
type and be the correct class (to BS 7291-1) for the application
concerned.
On either sealed or open-vented systems; where plastic pipe is
used a minimum of ONE metre of copper pipe (or as per pipe
manufacturers instructions) MUST be connected between both
the boiler flow and return connections and the plastic pipe.
! NOTE !
Do not connect plastic pipe directly to the boiler.
Grant UK does not accept any responsibility for any damage,
however caused, to plastic piping or fittings.
SEALED SYSTEMS
If plastic pipe is to be used, the installer must check with the
plastic pipe manufacturer that the pipe to be used is suitable for
the temperature and pressures concerned.
Plastic pipe must be Class S to BS 7291-1.
! WARNING !
When plastic pipe is used, the system MUST incorporate
a low pressure switch to shut off power to the boiler if
the system pressure drops below 0.2 bar. A suitable low
pressure switch kit is available to purchase from Grant UK
(product code: MPCBS62).
UNDERFLOOR PIPEWORK
Plastic pipe may be used on underfloor floor systems where the
plastic pipe is fitted after the thermostatic mixing valve. Copper
tube must be used for at least the first metre of flow and return
primary pipework between the boiler and the underfloor mixing/
blending valves.
4.6

CONNECTIONS

4.6.1 FLOW, RETURN AND HOT WATER
CONNECTIONS
Refer to Section 5.
4.6.2 CONDENSATE CONNECTION
Grant Vortex Outdoor Combi boilers are supplied with a factory-
fitted condensate trap to provide the required 75 mm water seal
in the condensate discharge pipe from the boiler.
Refer to Section 6 for details of the condensate disposal pipework.
4.6.3 DRAIN COCK
A drain cock is fitted at the bottom on the front of the boiler to
allow the heating system to be drained.
There is also a drain cock fitted at the bottom on the front of the
primary store.
Figure 4-1: Standard low level flue provided with Outdoor Module
Section 4: Installation
4.7 PREPARATION FOR
INSTALLATION
1. Carefully remove the packaging from the boiler and remove it
from the transit pallet.
2. Remove the case top panel (four screws) and also the front
and rear panels as required.
3. The flue may exit the boiler from the left, right or rear of the
casing. Carefully press out the pre-cut section on the side
or rear casing panel to provide the opening in the required
position for the flue to pass through the casing.
Fit the cover panel (with the round flue exit hole) over the
chosen opening in the casing. Fit the circular rubber sealing
grommet provided into the circular hole in the cover panel
before fitting the flue terminal section (or first flue extension if
the flue is being extended using the green system).
4. Slacken the wing nuts holding the starter elbow and rotate
the elbow to the required direction for the flue to exit the
casing.
5. Push the end of the flue terminal section or flue extension
(with the red seal) from the outside of the boiler casing
through the sealing grommet in the casing panel. The
terminal section has been factory lubricated. Take care not to
dislodge or damage the red flue seal.
If using the low level flue option provided with the boiler:
6. Carefully insert the terminal into the starter elbow until the
bend of the terminal contacts the outer casing, then pull the
terminal forward approximately 25mm and rotate the bend so
that the outlet is horizontal.
Rear Exit - The flue must discharge away from the
building.
Side Exit - The flue should discharge towards the rear
of the casing to prevent flue gases re-entering the boiler
casing through the air inlet vents on the casing door.
The flue terminal must be fitted horizontally to prevent
dripping from the end of the terminal.
If you are planning to extend the flue before terminating:
7. Carefully insert the first extension/elbow piece into the starter
elbow and secure with a locking band.
8. Tighten the wing nuts holding the starter elbow and fit the
stainless steel flue guard (if using low level flue option
provided with boiler) using the two screws provided.
9. The top panel of the casing has been designed so that it
may be fitted to create a slight slope away from the side
positioned against the wall. To tilt the top panel, loosen the
four top panel casing screws and push down on the side
furthest from the wall. Tighten the screws. See Figure 4-1.
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