27
Grant Vortex External Module
10 Fit the pump/pump valve assembly to the end of
the pressure relief valve/auto air vent manifold
pipe. Ensure that the pump shaft is horizontal and
the pump motor is facing towards the right side of
the boiler (viewed from the rear as shown in Fig.
19). The flow arrow on the body of the pump must
face in the required direction of flow – away from
the boiler flow connection – downwards in this
case.
11 Ensure that the pump/valve assembly is supported
by the bracket. The upper part of the lower valve
should rest on the support bracket, with the body of
the valve passing through the cut-out. Connect the
flow pipework to the lower pump valve.
12 Assemble the two sections of the pressure relief
valve discharge pipe using the 15 mm straight
push-fit connector provided. Adjust the pressure
relief valve so that the outlet points to the rear left
corner of the boiler (viewed from the rear of the
boiler).
13 Fit the pressure relief valve discharge pipe to the
pressure relief valve outlet using the nut and olive
provided. Route the pipe down the left hand rear
side of the boiler and locate the lower end through
the slot in the bottom flange of the left hand side
panel.
14 The circulating pump may be wired into the boiler
control panel if required. Refer to Section 10.
15 The pressure gauge and filling loop should be
installed in a convenient position inside the
building.
6 - BOILER INSTALLATION
Sealed system kit - 50/90
6.5b
See Fig. 20
1 The kit includes the following items:
Pressure relief valve and automatic air vent
Manifold pipe
12 litre expansion vessel with flexible hose and
sealing washer
Filling loop kit
Pressure gauge (mounted on compression Tee)
6 m head circulating pump with 22 mm gate type valves
15 mm copper pressure relief valve discharge pipe
2 Remove the ½” BSP black iron plug from the front of
the boiler waterway, using a
3
/
8
" drive socket wrench.
3 Fit the ½” BSP straight end of the flexible
expansion vessel hose to the tapping on the front of
the waterway using a suitable thread sealant.
4 Position the 12 litre expansion vessel on the front
of the boiler combustion door locating the bracket
into the slot of the combustion door.
5 Fit the ¾” BSP connection of the flexible
expansion vessel hose to the vessel using the black
rubber washer supplied and tighten the nut.
6 Fit the 22 mm compression elbow onto the boiler
flow connection.
7 Fit the pressure relief valve and automatic air vent
onto the manifold pipe. Then fit the manifold pipe
end into the 22mm compression connector on the
boiler flow pipe.
8 Fit both 22 mm pump valves to the circulating
pump using the sealing washers supplied.
9 Fit the pump assembly to the automatic air vent/
pressure relief valve assembly ensuring that the
pump shaft is horizontal and the pump motor is
facing towards the front of the boiler. The flow
arrow on the body of the pump must face in the
direction of flow away from the boiler connection.
10 Fit the pressure relief valve discharge pipe to the
pressure relief valve using the nut and olive
supplied. Route the discharge pipe through the slot
in the base of the right hand side panel. Push the
panel insulation back to expose the slot.
11 The circulating pump may be wired into the boiler
control panel if required. Refer to Section 10.
12 The pressure gauge and filling loop should be
installed in a convenient postion inside the
building.
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