Potterton Promax Store 24 Installation And Service Manual page 25

Making The Electrical Connections
To connect the mains input cable proceed as
follows:-
1. Remove all the outer panels.
2. Completely undo the screws securing the
facia panel and hinge it down.
3. Remove the control box cover securing
screws. Disengage the barbs on the control box
from the cover. Remove the cover.
4. Insert the cable through one of the grommets
at the top of the LH cylinder panel and route it to
the terminal block.
5. Slacken the screws in the terminal block,
connect the input cable, and tighten the screws.
NOTE: Both the Live and Neutral connections
are fused.
6. If a room thermostat is to be connected it can
be done at this point. Run the input cable from
the thermostat through the second cable
grommet in the cylinder side panel. Refer to the
instructions supplied with the control.
IMPORTANT: The room thermostat MUST be
suitable for 230V switching.
7. Remove the link between terminals 1 & 2. The
230V supply at terminal 1 can be connected to
the thermostat. The switched output from the
thermostat must be connected to terminal 2. If
the room thermostat being used incorporates an
anticipator it MUST be wired as shown in the
diagram.
8. Ensure that both mains input and, where
fitted, external control input cables have
sufficient slack to allow the control box to drop
down.
9. The boiler is fitted with a programmer that is
powered up when the selector switch is in the
( ) combined heating/hot water, or (
water only positions. Although unpowered when
the selector knob is in the "0" position, operating
times are retained in the programmer memory.
Full details of how to set up and use the
programmer are in the User%s Instructions.
10. An external frost "stat, if required, must be
wired in parallel with the room thermostat but will
only be effective when the programmer central
heating channel is set to the 24HR operating
position. Ensure that the user is aware of this
limitation.
Preliminary Electrical Checks
1. Prior to commissioning the boiler preliminary
electrical system checks should be carried out.
2. These should be performed using a suitable
meter, and include checks for Earth Continuity,
Resistance to Earth, Short Circuit and Polarity.
© Baxi Heating UK Ltd 2015
Fused supply 3A
230V ~ 50Hz
Live (brown)
Neutral (blue)
Earth (green/yellow)
230V
Fig. 13
) hot
Always fit fast
blow 2A fuse
br
b
g/y
N
bk
1
2
bk
Room Thermostat
br
L
N b
g/y
bk
1
230 V
2 bk
SL
25