26
Grant Euroflame Condensing External Modules
6 - BOILER INSTALLATION
1 The kit includes the following items:
Pressure relief valve
Automatic air vent
Manifold pipe
12 litre expansion vessel
Flexible expansion vessel hose and sealing washer
Filling loop kit - including pressure gauge mounted
on shut-off valve
6 m head circulating pump with 22 mm gate type
valves
15 mm copper pressure relief valve discharge pipe
(in two pieces)
½" BSP black iron Tee - NOT REQUIRED for
external boilers
Pump support bracket (with fixing screws)
2 Unscrew the burner securing nut and remove the
burner from the boiler.
3 Remove the ½" BSP black iron plug from the front
of the boiler waterway, using a
3
/
8
" drive socket
wrench.
4 Fit the ½" BSP straight connector end of the
flexible expansion vessel hose into the tapping on
the front of the waterway using a suitable thread
sealant (not supplied).
5 Position the 12 litre expansion vessel on the front
of the boiler combustion door, locating the vessel
bracket into the cut-out in the front of the
combustion door.
Note: On 50/70 and 70/90 models, press on the
pre-cut section in the centre of the door to form the
cut-out for the bracket.
6 Fit the ¾" BSP connection of the flexible
expansion vessel hose to the vessel using the black
rubber washer supplied and tighten the nut.
Sealed system kit
6.5
7 Fit the pump support bracket to the vertical plate
on the top of the boiler shell. Secure in place using
the screw, nut and washer provided.
8 Fit the 22 mm compression elbow (supplied with
the boiler) onto the boiler flow connection.
9 Fit both pressure relief valve and automatic air vent
onto the manifold pipe.
10 Connect the end of the manifold pipe to the elbow
on the boiler flow connection, so that the automatic
air vent is to the front of the boiler.
11 Fit both 22 mm pump valves to the circulating
pump using the sealing washers supplied.
12 Fit the pump assembly to the open end of the
manifold pipe, ensuring that the pump shaft is
horizontal and the pump motor is facing towards
the front of the boiler with the body resting on the
pump support bracket. The flow arrow on the body
of the pump must face in the direction of flow away
from the boiler connection.
13 Assemble the pressure relief valve discharge pipe
from the two sections of pipe provided in the kit.
Connect it to the pressure relief valve outlet using
the nut and olive supplied. Route the other end of
the discharge pipe through the slot in the base of
the right hand side panel. Push the panel insulation
back to expose the slot.
14 Re-fit the burner and tighten the fixing nut to secure.
15 The filling loop should be connected, via the double
check valve to a 15 mm cold water mains supply pipe
in a convenient position inside the building.
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