Alpha CombiMax Installation Instruction

ENSURE THE BOILER IS CONVERTED BEFORE FITTING THE COMBIMAX
See Figs. 3, 4, 5 and 6

The boiler may be converted before or after mounting it onto the wall as described below.
When mounting the boiler onto the wall follow the installation instructions supplied with the boiler.

Note: Do not connect the pipework, electrical mains supply or fit the flue until the CombiMax has been fitted.

1. Lower the front cover and loosen the two fixing screws
securing the control panel as shown in Fig. 3.

2. Remove the left hand side panel of the boiler by removing
the top and two bottom screws as shown in Fig. 3.

Fig. 3

3. Remove the differential pressure sensor from the boiler
using the spanner provided as follows:­Disconnect the two flow sensing pipes from the right
hand manifold, then unscrew and remove the end fitting
containing the filter/restrictor as shown in Fig. 4.

Differential
pressure sensor

4. Modify the differential pressure sensor (see Figs. 5 and 6) as follows:­a. Unscrew fitting 'A' and discard the components A, B and C as shown in Fig. 5.

C

B

Fig. 5 - Differential pressure sensor BEFORE modification

Restrictor

Filter

Fig. 4

A

b. Screw fitting 'D' (supplied in the conversion kit) into the sensor body as shown in Fig. 6.

D

Fig. 6 - Differential pressure sensor AFTER modification

5. Re-assemble the differential pressure sensor into the boiler in reverse order.

NOTE: After converting the boiler, fit the label supplied, to the inside of the hinged cover so that it can be seen.