Electrical Wiring; Fastening Of The Electrical Wires - Riello PRESS 45 N Installation, Use And Maintenance Instructions

5.5

Electrical wiring

Notes on safety for the electrical wiring
 The electrical wiring must be carried out with the electrical supply disconnected.
 Electrical wiring must be made in accordance with the regulations currently in force in the country of destination
and by qualified personnel. Refer to the wiring diagrams.
 The manufacturer declines all responsibility for modifications or connections different from those shown in the
DANGER
wiring diagrams.
 Check that the electrical supply of the burner corresponds to that shown on the identification label and in this
manual.
 The burner has been type-approved for intermittent use.
This means they should compulsorily be stopped at least once every 24 hours to enable the control box to
perform checks of its own start-up efficiency. Normally, burner stopping is guaranteed by the boiler's thermostat/
pressure switch.
 If this is not the case, a time switch should be fitted in series to TL to stop the burner at least once every 24 hours.
Refer to the wiring diagrams.
 The electrical safety of the device is obtained only when it is correctly connected to an efficient earthing system,
made according to current standards. It is necessary to check this fundamental safety requirement. In the event of
doubt, have the electrical system checked by qualified personnel.
 The electrical system must be suitable for the maximum power absorption of the device, as indicated on the label
and in the manual, checking in particular that the section of the cables is suitable for that level of power
absorption.
 For the main power supply of the device from the electricity mains:
- do not use adapters, multiple sockets or extensions;
- use a multiple pole switch with at least a 3mm gap between the contacts (overvoltage category III), as
envisaged by the present safety standards.
 Do not touch the device with wet or damp body parts and/or in bare feet.
 Do not pull the electric cables.
Before carrying out any maintenance, cleaning or checking
operations:
Disconnect the electrical supply from the burner
by means of the main system switch.
DANGER
Turn off the fuel interception tap.
DANGER
Avoid condensate, ice and water leaks from
forming.
DANGER
If the cover is still present, remove it and proceed with the
electrical wiring according to the wiring diagrams.
Use flexible cables in compliance with the EN 60 335-1 standard.
5.5.1

Fastening of the electrical wires

All the wires, which have to be connected to the burner terminal
strip (16, Fig. 3) shall pass through the fair leads (17, Fig. 3), see
Fig. 7.
1 - Pre-heating resistances single phase
supply: ........................................................... fair lead Pg 21
2 - Motor three phase supply: ............................. fair lead Pg 16
3 - Single phase supply and safety
thermostat:.................................................. fair lead Pg 13.5
4 - Control thermostat: ..................................... fair lead Pg 13.5
nd
5 - 2 stage thermostat:.................................. fair lead Pg 13.5
6 - Pre-sheared hole
Installation
D2676
Further prospective signals or controls can be connected to the
burner terminal strip by removing the metal weldnuts from the
pre-sheared holes and inserting a commun fair lead for the
passage and the clamping of the leads.
NOTES
– Carry out a safe earth connection.
– Verify the burner stop by opening the boiler thermostat and
the burner lock-out by darkening the photoresistance.
After carrying out maintenance, cleaning or
checking operations, reassemble the hood and all
the safety and protection devices of the burner.
11 GB
Fig 7
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