Installation - Electrical; Important Notes; Off Peak And 24 Hour Electrical Supply - Heatrae Sadia ELECTROMAX Installation & Servicing Instructions Manual

6.0 Installation - Electrical

6.1 Important Notes

All wiring must be carried out in accordance
with the current IEE Wiring Regulations.
The Electromax electrical installation must
be carried out by a competent person in
accordance with any relevant regulations
in force at the time of installation and the
requirements of these instructions to ensure
correct operation.
The main incoming electrical supply to the
property must be of sufficient current rating
and voltage for the Electromax and any other
electrical requirements for the property.
The consumer unit must be fitted with a
double pole RCD with a trip sensitivity of 30mA
capable of breaking the full load current to BS
EN 61008:1994.
A correctly rated MCB must be used in the
supply to the Electromax boiler and immersion
heaters. The MCB to the boiler must be rated
at 45A. The MCB to each immersion heater
must be rated at 16A. It may be necessary to
fit a blanking plate between the 45A MCB and
other MCB's in the consumer unit to provide
ventilation, check with the MCB manufacturer.
Each circuit must incorporate an isolating
switch which must have a minimum contact
separation of at least 3mm in all poles.
3 amp protection has been provided for the
Electricity Supplier
Midlands
Norweb
Southern
South Wales
South Western
Yorkshire
Scottish Hydro
Manweb
Table 2 Economy 10 Providers
20 Installation & Servicing Instructions
ECONOMY 10 PROVIDERS
Off-Peak Times
midnight - 5.00am
midnight - 5.00am
midnight - 5.00am
midnight - 5.00am
midnight - 5.00am
midnight - 5.00am
4.30 - 7.30am
4.30 - 7.30am
thermostat 'L' and the pump 'L'. The fuses are
located in the control assembly.
6.2 Off-Peak and 24 hour Electrical Supply
To obtain optimum performance and lowest
running costs from your Electromax unit it
should be connected to an Off-Peak electrical
supply. The "Economy 10" tariff, which is
available from most major electricity suppliers,
is recommended. Table 2, page 20 shows the
suppliers that offer "Economy 10" and the
times that "off peak" electricity is supplied.
Other Off-Peak tariffs may be suitable, consult
the Heatrae Sadia Specification Team or your
electricity supplier for further advice.
With an Off-Peak electrical supply there will be
two sets of electrical outputs from the consumer
unit or two separate consumer units. One will
supply the circuits that have a dedicated off
peak use (such as night storage heaters or off
peak water heater), the other will provide a 24
hour supply to circuits in use throughout the
day (such as lighting, sockets, etc.).
Off Peak supply connection
A suitable electrical connection must be taken
from the Off Peak supply to the Electromax
terminal block. The supply cable should be
1.5mm cross sectional area 3 core HOFR
2
sheathed cable and must be routed into the
Electromax via one of the 20mm cable glands
previously fitted (see section 3.3, page 10). The
Live (Brown) conductor should be connected
1.00 - 4.00pm 8.00 - 10.00pm
1.00 - 4.00pm 8.00 - 10.00pm
1.00 - 4.00pm 8.00 - 10.00pm
1.00 - 4.00pm 8.00 - 10.00pm
1.00 - 4.00pm 8.00 - 10.00pm
1.00 - 4.00pm 8.00 - 10.00pm
1.00 - 4.00pm 8.30 - 12.30pm
1.00 - 4.00pm 8.30 - 12.30pm
GMT or Clock
GMT
GMT
GMT
GMT
GMT
GMT
Clock
Clock