System Details - Benchmark ELECTRAMATE 2000-270/12KW Design, Installation And Servicing Instructions

Element_3, boiler pump
and Green LED _2 ON
Element_2, and Green LED _4 ON
10-180s 10-180s 10-180s
Element _1
(4.5kW)
Element _2
(4.5kW)
Element _3
(3.0kW)
Store
stat
RESTRICTED OFF-PEAK
63 Amp 230 VAC~50 Hz
Pre-Wired feed cable
A2
TIMED INTERLOCK
CONTACTOR LOGIC
A2
PERMANENT ON-PEAK 24Hr
63 Amp 230 VAC~50 Hz
Pre-Wired feed cable
24 Hour ON-PEAK MCB 6A
Element_1,
and Green LED _1 ON
10-205
Store stat calling
OFF-PEAK C2
LIVE BUS
25A
MCB
A1
A1
H1
4.5 KW
NEUTRAL BUS
ON-PEAK C1
B-OHT
S-OHT
OFF-PEAK MCB 6A
1.0 DESIGN

1.3 SYSTEM DETAILS

This appliance requires 2 electrical supplies,
a 24 hour ON PEAK continuous supply and
an OFF PEAK restricted supply each rated at
63 amps. A schematic arrangement of the
ElectraMate system is shown below.
To ensure efficient operation of the appliance
it is important that discussions take place
with the Electrical Supply Authority to
ensure that the best off peak supply/tariff is
Element_1, and Green LED _1 OFF utilized. However, the appliance can be easily
configured on site at any time to suit any type
Element_2, and Green LED _4 OFF
of tariff which is/becomes available.
Element_3, boiler pump
and Green LED _2 OFF
Note: The boiler pump will
When designing the electrical system reference
continue to run for a short
period after Green LED 2 has should be made to the latest issue of the IEE
gone off to provide a boiler
Requirements for Electrical Installations and
overrun.
the table on the next page to ensure that
the electrical supplies are adequate and that
the correct circuit protection/cable sizes are
chosen.
This is particularly important in existing
properties, especially if these are blocks of
flats/apartments.
However, the ACB will only allow the supply to
Time
each of the three elements in the electric flow
boiler to be switched at random to keep the
maximum simultaneous switching current to
a minimum. The random switching will vary at
each cycle and for each appliance (see sketch
opposite)
25A
20A
MCB MCB
A1 A1 A1
A2 A2
A2
H2 H3
4.5 KW
3.0 KW
A1 A2
R1
Page 10
Store Sensor
DHW Sensor
PHE Sensor
Programmable
Room Stat.
Appliance Control Board (ACB)
PCB
N
24 Hour
Supply
L
DHW Boiler Heating
Pump Pump Pump