1.1
Overview
The Polywarm-Maxi range of Indirect hot water cylinders and storage tanks are carbon
steel construction with a patented WRAS approved internal coating for UK commercial
(dhw) systems. The calorifier range consists of single and twin coil variants offering
enhanced dhw performance by linking the coils in series when using a single heat
source or connected separately when using two heat sources.
There are four models of calorifiers with storage capacities from 500 - 1500 litres.
There are seven models of storage tanks with capacities from 500 - 3000 litres.
Controls
- external (non Elco supply) devices may be used to control the operation of
the system or alternatively the Elco
Easy Control
panel is designed for simple timed
control of the domestic hot water throughout the day (3 periods per day) whilst also
managing the Anti-Legionella function, system re-circulation pump and up to two heat
sources plus an immersion heater - refer to
Easy Control
instructions & section 22, for
further information.
1.2
Regulations
Attention is drawn to the following documents
for best practice:
Statutory Instruments
Water Supply (Water Quality England & Wales) Regulations 2016 - as amended
The Public Water Supplies (Scotland) Regulations 2014 - as amended
The Water Supply (Water Fittings) Regulation (Northern Ireland) 2009 - as amended
British Standards
BS 6880
Part 1, 2 & 3 Code of Practice for low temperature hot water heating systems of output
greater than 45kW.
BS 7074
Part 1: Application, selection and installation of expansion vessels and ancillary
equipment for sealed water systems.
Part 2: Code of Practice for low and medium temperature hot water heating systems.
BS 7671
Requirements for electrical installations. IET Wiring Regulations. 17th edition.
BS 8550
Guide for the auditing of water quality sampling
BS 8558
Guide to the design, installation, and maintenance of services supplying water for
domestic use within buildings.
Note:
this document is complimentary to
BS EN 806
BS 14743
Water conditioning equipment inside buildings. Softeners. Requirements for
performance, safety and testing
BS EN ISO 4126-1
Safety devices for protection against excessive pressure. Safety valves.
BS EN 806
Specification for installations inside buildings conveying water for human
consumption
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