SAFETY REQUIRMENTS & ADVICE SHEET
Introduction
The objective of this leaflet is to provide information to ensure that the safety of the person(s) installing or maintaining the equipment is not compromised
and its location and method of installation does not endanger others, either during or after installation. Customers should be aware of the Health and
Safety at Work Act 1974 (HSW 1974) and the EC “Provision and Use of Work Equipment Regulations 1992” (PUWER). Both are available from the Health
and Safety Executive (HSE) publications, within the UK.
Installation
CE Directives
These are European regulations which apply to our industry. They affect the equipment emissions and immunity to Radio Frequency Interference (RFI) and
various elements of safety for electrical equipment.
The European Community ‘CE’ Directives that mainly concern Sontay Ltd are the Low Voltage Directive (LVD) and the Electromagnetic Compliance
Directive (EMC).
A Declaration of Conformity may be supplied with the product or supplied on request.
Torque Settings
See specification.
Cooling Requirements
The use of an additional heatsink (this could be a conductive panel) suitably attached or mounted with the unit, will help to dissipate heat away from the
device(s). An alternative or additional method would be forced air-cooling (using a fan), to assist the natural convection of airflow over an existing
heatsink within the unit. The product fins should be mounted in line with the forced and/or natural airflow.
The equipment’s environment and its initial ambient temperature also need to be considered, as this could have an adverse effect on the overall operating
conditions.
Fusing
We recommend that semiconductor, fast acting to BS88 IEC 269, type fuses or circuit breakers (Semiconductor - MCB) should be used for unit and/or
device protection. The appropriate maximum load current should be known to select the required fuse or MCB, but must not exceed the equipment
rating. The I² t (A² s) rating of the selected fuse must be less than that of the equipment so as to protect the equipment’s discrete device. Further
appropriate fusing may be required for protection of the unit supply using standard fuse links and holders. Failure to address these requirements and the
use of incorrectly selected fuses may cause the equipment to fail.
Earthing
The protective conductor terminal of the equipment must be utilised at all times and bonded to a ‘good’ Earth (ground). The earth bonding (strapping)
leads of any combined equipment should be as short as possible and be substantial, i.e. at least rated higher than the equipment’s load. For further
information, refer to BS7671. Following these simple guidelines will ensure optimum use of any appropriate filter circuits which may be required.
Insulation (over-voltage category) and Protection from electric shock Classification of Equipment
All equipment, unless otherwise stated, is rated to CLASS II Insulation (Over-voltage category) and CLASS I (Protection category).
Maintenance
Before any servicing is carried out, reference should be made to appropriate installation instructions, drawings and labelling which may come with the
equipment. Personnel should switch off the unit supply before accessing or removing any safety cover and be aware of hazardous live parts.
Safety Interlocks for Sontay RE Electric Heater Battery Controllers
Sontay Ltd. recommends that the installation and maintenance of all RE electric heater battery controllers should be done with reference to BS
7671:2008+A3:2015 (Requirements for Electrical Installations. IET Wiring Regulations).
All users of the IET Wiring Regulations should be aware of changes in Amendment No. 3 to the 17th Edition. Amendment No. 3 came into effect on 1 July
2015.
For international installations, please refer to local regulations for guidance.
Adherence to BS 7671, Chapter 42 (Protection Against Thermal Effects), and in particular;
420.3 –General Requirements,
421 –Protection Against Fire Caused by Electrical Equipment
o421.1
o412.2
422 –Precautions Where Particular Risks of Fire Exist
o422.1.2
o422.1.3
should be undertaken, and as a minimum, a mains isolation switch, a load-breaker switch and a contact breaker should be installed in the electric heater
battery controller supply. The supply to the contactor coil should be interrupted by an over-temperature (hi-limit) thermostat located in the heater battery
and also upon detection of airflow loss (fan proving), via an air flow switch, air DP switch across the fan or fan current switch in the fan supply.
