Potterton Ultra 2, Installation & Service Instructions Manual

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Replacement of Parts - Page 50
6.21 Expansion Vessel
Depending on ease of access, the expansion vessel can be
removed from the left, right or from above the boiler.
Alternatively, the boiler can be taken off the wall and the
vessel removed from the boiler.
All
1. Gain General Access - See Section 6.1 complete.
2. Drain the boiler by removing the pressure gauge
connection from the water manifold.
Note: When the boiler is drained filled or vented, the
manual lever on the left hand side of the diverter valve
must be moved to the 'MID' (manual override) position.
Return it to its original position after the system has
been filled and vented.
3. Disconnect the flexible pipe from the water manifold.
Side Removal - Remove the white case side - two screws.
Top Removal - If the flue exits out the rear it will need
disconnecting to allow access.
Boiler off wall - Close all service cocks - water and gas
(Section 2.12 & 2.13), isolate electricity supply (Section
2.10), remove fan assembly (Section 6.17). Disconnect the
water and gas service cocks, disconnect the electricity
supply and lift the boiler off the wall.
4. Remove the vessel securing bracket(s).
5. Remove the vessel.
6. Position the new vessel in the frame with the
connection point down and to the right.
7. Fill the system and vent the boiler as described in
Section 2.13. Check the expansion vessel connection
for water soundness.
8. Re-assemble the boiler in reverse order.