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19
INSTALLATION
Manual No. 405/0101
INSTALLATION - PAGE 19
3.15
REPLACE THE EXPANSION VESSEL
Refer to Fig. 26.
1.
Remove the two tie rods from the retaining clips on the
front of the expansion vessel frame and remove the split
pins from the ends of the rods.
2.
With the control box lowered, locate the bottom of the
expansion vessel frame into its pivoting point in the boiler
chassis as shown in Fig. 26.
3.
Hook the plain ends of the tie rods into the brackets on the
sides of the boiler, then locate the other ends in the
brackets on the expansion vessel frame. Pass the split
pins through the ends of the rods to secure them in place
at the expansion vessel end. See Fig. 26.
4.
Position the expansion vessel in the frame with the
connection point uppermost and towards the boiler.
5.
Reconnect the flexible connection to expansion vessel.
Ensure that the washer is in position between the flexible
connection and expansion tank.
6.
Leave the expansion vessel in the lowered position.
Fig. 26
3.16
CONNECT THE WATER SYSTEM AND VENT THE BOILER
Refer to Fig. 27 (expansion vessel, frame and control box omitted for clarity).
1.
Ensure that the three plastic plugs are removed from the
pipe ends.
2.
Make the connections as shown in Fig. 27.
For dimensions see section 2.10.
For system schematic see section 2.12.
3.
Fill the system, see section 2.11, paragraph 4.
Ensure that all valves are open.
The pump isolating valves are open when the operating
slots are horizontal.
The manual lever on the right hand side of the diverter
valve, see Fig. 27, must be moved to the 'MAN OPEN'
(top) position when filling, venting or draining the system.
Thoroughly flush the system through. A radiator type air
vent is positioned on the left hand side (at the front) of the
heat exchanger, and is accessible through a hole in the
blanking plate connected to the flue hood. Use this to
vent the boiler.
Fig. 27
4.
Refill and vent the system.
5.
The pump bearings and shaft rely on system water to provide lubrication. It is important therefore to ensure that the
bearings have been properly vented and
that the pump is not run dry
otherwise damage may occur to the bearings.
Unscrew the pump manual restart knob, see Fig. 27 and withdraw it to engage in the motor shaft. Rotate the knob and
check that the motor shaft rotates freely. Apply a sideways pressure to the knob until a small amount of water becomes
visible. The pump is now vented. After use the manual restart knob should be screwed back into its original position, finger
tight. Take care not to allow any water to drip onto the control box or other electrics.
6.
Pressurise the system to 1.5 bar and check for leaks, rectifying where necessary.
Set the red adjustable pointer on the pressure gauge to 1.5 bar.
Note:
Any discharge from the safety valve must be directed clear of the boiler to a drain in such a manner that it may be seen,
but cannot cause injury to persons or property.
