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 at 240V ~ . The supply cable
must therefore be separate and dedicated
to the boiler. The supply cable should be a
2
minimum of 6mm cross sectional area, check
the IEE Wiring Regulations for correct cable
sizing). It must be routed into the Electromax
(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 "
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
45 AMP SUPPLY ".
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
the Programmable Room Thermostat and
Diagram 14 (Schematic Wiring Diagram).
Connection to the Electromax should be
with 2 core cable of 0.5mm
sectional area suitable for a 240V supply,
bell wire MUST NOT be used. The cable
must be routed into the Electromax via one
(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".
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 A B
TIMER 2 RELAY 1
A1 B1 A2 15 16 18 A1 B1 A2 A1 A2
OFF 24 OFF ROOM ROOM
24
N L
STAT
PEAK HOUR PEAK HOUR STAT
L R
N N 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
2
to 1.0mm
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
NC N N L
CONTROL PUMP
ELECTRIC BOILER
CONTROL PCB
2
cross
L
N L
CONN 5
21