Zeus Maior 24 Instructions
Gas Supply
The meter and supply pipes must be sized to deliver the gas rate and pressure given on page 3. The
boiler requires at least a 22 mm (3/4”) gas supply pipe.
The complete installation, including the meter, must be tested for gas soundness and purged as described
in IS 813:2002.
Electrical Installation
The boiler requires a 230V ~ 50 Hz mains supply, fused at 2 A. Polarity of the supply must not be reversed
or the boiler will not function properly. The boiler will not function properly and may be damaged when con-
nected to a generator which does produce a true sine wave type output.
The boiler must be earthed.
There must only be one common isolator, providing complete electrical isolation, for the boiler and any ex-
ternal controls.
Using PVC insulated cable not less than 0.75 mm² (24 x 0.2 mm) to BS 6500 Table 16, the boiler should be
connected to a fused three pin plug and unswitched shuttered socket outlet (both complying with BS 1363),
or a fused double pole switch with a contact separation of at least 3 mm in both poles.
Wiring external to the boiler must be in accordance with the current IEE Wiring Regulations.
General Installation Information
Zeus Maior Control board
35 34 33 32
N L E
B
ro
w
n
B
lu
e
G
re
e
n
/Y
e
llo
w
Replace link with
volt free contact from CH
controls
NB: Do not connect 220V !
Mains Lead
IMPORTANT:
External controls connected to the boiler must be of the volt free type and are connected to termi-
nals 34 and 35 as shown above
.
Connection of a voltage to any boiler terminals other than the
mains lead will result in destruction of the boiler control panel.
Clearances and Air Supply
The boiler does not require any air vents for cooling in the room in which it is installed or when installed in a
cupboard or compartment. The minimum clearances for servicing must always be maintained. Please see
table on page 3.
Note:
A cupboard or compartment used to enclose the boiler must be designed and constructed specifically
for the purpose.
