Tue, 14 July 2020
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Heat Exchangers & Accessories : Heat Exchanger - Info

By utilising a heat exchanger you can create the most economical and efficient way to heat a swimming pool or a Koi pond. Linked to a boiler, the heat is transferred to the pool via the heat exchanger. The final selection of a heat exchanger should be ascertained by pool capacity, boiler output, heat retention properties and positioning of equipment. The output specification of the heat exchanger is the maximum that may be reasonably expected the unit to produce, so it is therefore highly recommended to upgrade to the next output size if in any doubt.

It is important that the correct rated boiler is used for the size and gallonage of the pool and that the flow rates are not exceeded. The maximum flow rates for the primary and secondary circuits are stated on the label fixed on the front of the boiler along with the relevant rating of that specific heat exchanger.

All the units are designed for wall mounting and the design incorporates an internal finned primary heating element for maximum efficiency. Manufactured from quality marine grade Type 316 stainless steel, each unit undergoes 12 stringent tests during quality control production. Each unit is tested to 70 p.s.i before leaving the factory and each one is guaranteed for a full 12 months from purchase date, subject to essential conditions are strictly followed during the installation and working life.

Maintenance Notes: Please note that some of these requirements are relative to swimming pool installations as well as Koi pond installations.

All units must be installed vertically. Care must be taken to insure that no chemical residue can enter the heat exchanger when the system is not running. It is recommended to maintain a constant pH between 7.2 7.6 to prevent excessive scaling deposits and corrosion.

When chemical treatments to the pool or pond take place, the treatment should take place as far downstream to the unit as possible. Where possible prohibit the flow through the exchanger until some chemical dispersion has taken effect, and preferably before re-circulating through the heating system again.

Each unit has its own serial number and many manufacturing details can be traced by sourcing this information. This data is found on the label secured to the front of the heat exchanger and for obvious reasons do not remove this label under any circumstances.

It is paramount that the unit is installed in an upright position; with the primary and flow connections from the boiler set top and bottom.

The secondary flow, which is the heated flow to the pool (usually after filtration), is then connected to the top right and the flow though which transfers the heated water to the pool will be situated at the lower left outlet. All threaded connections are BSP thread. GM are able to supply these fittings from stock and are available in a number of sizes and materials. See pipe fittings (plumbing)


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