17
Pipe Connections
Flow pipe
Figure 5-3:
Fit flow pipe and remove screws
Figure 5-4:
Remove split pin and fit phials
5.3 Water Connections -
Boiler House Models
26/36, 36/46 Flow connection:
A
28 mm pipe is provided for the flow
connection. This is located on the right
hand side of the boiler. This flow pipe will
need to be vented, as it is the highest
point on the primary heat exchanger.
If a Grant low level balanced flue
(Yellow system) or external balanced
flue (Green system ) is used, and the
flue points to the right of the boiler
(viewed from the front), the Heating
flow pipe MUST be set to point
towards the front of the boiler to avoid
clashing with the flue.
26/36, 36/46 Return connection:
A
1" BSP socket is located on top of the
boiler. This return pipe will also need
to be vented at some point, as it is the
highest point on the secondary heat
exchanger.
46/58, 58/70 Flow connection:
A 1¼"
BSP socket is provided for the flow
connection. This is located on the right
hand side of the boiler. This flow pipe will
need to be vented, as it is the highest
point on the primary heat exchanger.
46/58, 58/70 Return connection:
A
1¼" BSP socket is located on top of the
boiler. This return pipe will also need
to be vented at some point, as it is the
highest point on the secondary heat
exchanger.
Split pin
Thermostat
phials
Pockets
Figure 5-5:
Secure dual thermostat bracket
Figure 5-2:
Water connections and thermostat phial positions (Boiler House models)
5.4 Fit the flow pipe and dual
thermostat - 26/36, 36/46
Boiler House Models
1. Fit the flow pipe (supplied with the
burner) into the flow connection of
the boiler. Ensure it is vertical and
fully inserted.
2. Rotate the pipe to the required
direction and fully tighten the nut.
3. Remove and retain the two screws
shown from the side panel (required
to secure bracket).
4. Remove and retain the split pin from
the pockets on the flow pipe.
5. Insert the phials of the dual thermostat
(supplied with the burner) into the
pockets on the flow pipe. Replace the
split pin to retain the phials.
6. Place the dual thermostat and
bracket in position and secure using
the two screws previously removed.
7. Use the 28 mm straight connection
supplied with the boiler to connect
the flow pipe.
Vortex 46/58, 58/70 Boiler House
Heating return
Heating flow
Dual stat
(comes fitted)
Vortex 26/36, 36/46 Boiler House
Heating return
Heating flow
Dual stat
