Boiler Connection (45 Amp); Programmable Room Thermostat - Heatrae Sadia ELECTROMAX Installation & Servicing Instructions Manual

6.3 Boiler Connection (45 Amp)

The Electromax boiler has a rated maximum
output of 9kW or 6kW at 240V ~ . The
supply cable must therefore be separate
and dedicated to the boiler. The supply
cable should be a minimum of 6mm
cross sectional area, check the IEE Wiring
Regulations for correct cable sizing). It must
be routed into the Electromax via the 25mm
cable gland previously fitted (see section
3.3, page 10). The Live (Brown) conductor
should be connected to the termination
marked "L 45 AMP SUPPLY"; the Neutral
(Blue) conductor should be connected to the
termination marked "N 45AMP SUPPLY"; the
Earth (Green/Yellow) conductor should be
connected to the termination marked "
AMP SUPPLY ". Where "twin and earth" cable
is being used the bare earth conductor should
be sleeved with suitable Green / Yellow earth
cable sleeving. See section 6.1, page 19 for
MCB and isolation requirements.
BOOST HEATER
ON
INDICATOR
NEON
DHW ON
SWITCH
1 2 3 1 2 3 1 2
BOOST ON
SWITCH
Diagram 14
Schematic Wiring
Diagram
BOOST (TOP)
IMMERSION
HEATER
A
TIMER 1
N N
3
15 16 18
CH ON
SWITCH
3A
TERMINAL
BLOCK
OFF PEAK
SUPPLY
16AMP

6.4 Programmable Room Thermostat

Connection
Refer to the Instruction Leaflet supplied with
the Programmable Room Thermostat and
Diagram 14 (Schematic Wiring Diagram).
Connection to the Electromax should be
with 2 core cable of 0.5mm
2
sectional area suitable for a 240V supply,
bell wire MUST NOT be used. The cable
must be routed into the Electromax via one
of the 20mm cable glands previously fitted
(see section 3.3, page 10). One conductor
should be connected to the termination
marked "TO ROOM THERMOSTAT L";
the other conductor should be connected
to the termination marked "FROM ROOM
THERMOSTAT RUN".
45
Please note that the terminations on the
Programmable Room Thermostat marked
"B COM" and "C N/O" should be used.
Connection to terminal "A N/C" will result in
incorrect operation of the Electromax boiler.
The clock function of the Programmable
Room Thermostat is battery operated (2 x AA/
MN1500/LR alkaline batteries supplied).
OFF PEAK (LOWER)
IMMERSION
HEATER
B
B A
TIMER 2 RELAY 1
A1 B1 A2 15 16 18 A1 B1 A2 A1 A2
ROOM ROOM
OFF 24 OFF 24
N L
PEAK HOUR PEAK STAT STAT
HOUR
R
N N L L L
ELECTRIC
BOILER
SUPPLY
45AMP
24 HOUR
SUPPLY
PROGRAMMABLE
16AMP
A B C
ROOM
THERMOSTAT
COM
N/C N/O
(SUPPLIED)
Installation & Servicing Instructions
to 1.0mm
2
ALL EARTH POINTS MUST BE
LINKED BACK TO THE CONTROLS
ASSEMBLY EARTH TERMINATIONS
0.47uFX2
CAPACITOR
FASCIA
RELAY 2
CONTROLS
21 24 A1 A2 11 14
ASSEMBLY
PUMP
N
3A
L
NC N N
CONTROL PUMP
ELECTRIC BOILER
CONTROL PCB
cross
2
L
N L
CONN 5
21