Baxi Combi 133 HE Plus Installation & Servicing Instructions Manual page 40

Facia Box
Fig. 51
Pump
Pump
Head
Plug Connector
Pump Electrical
Cover
40
© Baxi Heating UK Limited 2005
Facia Securing Screws
Pump Setting
Hydraulic
Manifold
Wiring
Harness
Fig. 53
Fig. 54
13.0
The pump, 3-way diverter valve, pressure gauge,
pressure relief valve, plate heat exchanger and DHW
flow switch can be accessed after hinging down the
facia box.
1. Release the facia securing screws (
down the facia box (Fig. 51).
13.7
1. If only the head needs replacing, a standard Grundfos
UPS 15-60 pump head is interchangeable (see section
13.9 for details).
2. This must be switched to setting N
13.8
1. Drain the boiler (see Section 13.1 paragraph 2 & 3).
2. Unplug the wiring harness from the pump.
3. Remove the four screws retaining the pump
backplate to the hydraulic manifold.
NOTE: Ensure nuts are not dislodged.
4. Remove the pump.
5. Fit the new pump and reassemble in reverse order.
13.9
Fig. 52
1. Drain the boiler (see Section 13.1 paragraph 2 & 3).
2. Unplug the wiring harness from the pump.
3. Remove the four socket head screws securing the
pump head and separate it from the housing.
4. Remove the screws retaining the pump electrical
covers on the original and replacement heads.
5. From the replacement UPS 15-60 pump head
remove the strain relief cable gland and discard.
6. Remove the plug connector from the old pump head
and wire it into the UPS 15-60 pump head.
7. Replace the electrical cover to the new pump head
and assemble with the electrical box at 6 o'clock to the
housing.
8. Check that the pump has been switched to setting
N o 3 (Fig. 52) and reconnect the wiring harness plug.
Changing Components
1 / turn) and hinge
4
Pump (Fig. 51)
o 3 (Fig. 52).
Pump (Complete)
(Fig. 53)
Pump (Head Only) (Fig. 54)