page no. 20 of 44
HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.6 Mar 2020.
Warning: THIS APPLIANCE MUST BE
EARTHED.
Warning: Lockout reset is by a switched
Neutral to the controls in the heater.
Warning: Wiring external to the unit must be
carried out by an appropriately qualified
person to current IEE regulations for
Electrical Installations and any local regulations which
apply.
Wiring should be completed in flexible conduit.
The local electrical supply must be run to a point adjacent
to the heater and be suitably terminated to provide an
isolation point that will prevent remote activation of the
unit during servicing.
The local electrical supply conditions must be compatible
with the electrical data given on the appliance data plate.
Wiring should be completed in flexible conduit.
Heaters are for use with 230V, 1N, 50Hz supplies.
The method of connection to the main electricity supply
must:-
- facilitate the complete electrical isolation of the
heater(s) via a suitable fused isolator that will prevent
remote activation of the heater during servicing (see
section 1.2 for ratings).
- be in a readily accessible position adjacent to the
heater(s).
- serve only the heater(s).
- have a contact separation of at least 3mm in all poles.
See section 2.5 or the accompanying wiring diagram for
the heater electrical connections.
Reference must be made to Section 2.4.5 to ascertain
the electrical loading of the unit(s) being installed so that
cables of adequate cross-sectional area are used for
the electrical installation. The length of the conductors
between the cord anchorage and the terminals must be
such that the current carrying conductors become taut
before the earth conductor if the cable or cord slips out
of the cord anchorage. All external controls must be of an
approved type.
* where used
H
ea
t L
OW D
em
an
d
23
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put
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ck
ou
t 1 I
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n
23
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put
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ck
ou
t 1 Re
se
t
N
eu
tr
al I
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M
ai
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an
Pr
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(s
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er
s)
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ea
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em
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23
0V
In
put
*L
oc
ko
ut 2 I
ndi
ca
tio
n
23
0V
O
ut
put
*L
oc
ko
ut 2 Re
se
t
N
eu
tr
al I
np
ut
t1
t10
t8
t9
t3
t5 t6
t7
