Elecro Engineering 800 Series - Swimming Pool Heater Manual

POSITIONING

Your ELECRO heater must be screw-mounted to a firm base. The heater MUST be upright (I.e. feet down, with the control box uppermost) and on a level plane, to ensure correct operation of the gravity operated flow switch mechanism.

The heater should be installed at the lowest possible point in the filtration system. It should be located after (I.e. down-stream of ) the pump and filter, but before (I.e. upstream of) any dosing or other water treatment plant. Air and debris must not be allowed to enter the heater.

PIPE WORK

It is essential that the pipe work feeding to and from the heater has a minimum bore (internal diameter) of 1¼" (32mm), to ensure that should any air enter the heater, it is quickly flushed out and unable to form a pocket.

To assist in air purging and ensure the heater remains completely full of water, the return pipe which exits the heater MUST incorporate a safety loop, installed close to the heater, of an inverted U-shape in which the pipe rises 60-mm above the heater's outlet port. (see illustration below).

ALL INSTALLATIONS MUST INCORPORATE A SAFETY LOOP OR INVERTED 'U' IN THE PIPE WORK EXITING THE HEATER. THIS MUST BE INSTALLED AS CLOSE AS POSSIBLE TO THE HEATER.

WHEN COUPLING TO FLEXIBLE PIPE WORK THIS CAN BE ACHIEVED BY ROUTING THE PIPE UP AND OVER AN OBSTACLE.

To allow coupling to flexible pipe work your heater is supplied with hosetail adaptors (Models 2-kW to 9-kW)). The hosetail threads must be made watertight using PTFE tape or silicon sealant (RTV). Flexible pipes must be securely clamped to the hosetails using a jubilee clip or similar.

Diagrams assume water flow from left to right. Note that the lift in the pipe work shown in the diagrams must ALWAYS be installed on the outlet of the heater I.e. with water flow from right to left, the lift in the pipe work must be installed at the opposite end of the heater to that shown in the diagram.

FLOW REQUIREMENTS

The required direction of flow is clearly shown on the specification label attached to the tank. It must not be reversed unless your heater is fitted with an external reversible flow switch (selected models only). The flow rate of water entering the heater should not exceed 10,000 litres per hour. A higher flow rate will require the installation of a bypass, in order to prevent damage to the heating element(s). The flow rate should not be less than 1,000 litres per hour.

WEATHER PROTECTION

The heater should be installed within a dry weatherproof enclosure.
If the heater is not used during winter months, it must be drained to prevent frost damage.

ELECTRICAL CONNECTION

The heater must be installed in accordance with the latest IEE wiring regulations, which state that the work must be carried out by a qualified electrician, who will provide a certificate of conformity upon completion of the work. The power supply must be fitted with a 30-mA circuit breaker (RCD).

Cable section: should be calculated at 5-amp / mm² for distances up to 20 metres (these sections are indicative and should be checked and adapted if necessary for cable lengths over 20 metres).

The water quality must be within the following limits:

PH 6.8-8.0
Chloride Content MAX: 150-mg/litre
Free Chlorine: 2.0-mg/litre
Total Bromine MAX: 4.5-mg/litre
The 800 Series heater is NOT Suitable for use with salt water.

OPERATING YOUR ELECRO HEATER

Once installation has been completed, run the water circulating pump for a few minutes to purge the system of air.

On initial power up of the heater the amber light should illuminate. Only when the water circulating pump is operational and delivering in excess of 1,000-litres per hour of flow, and the temperature knob is set to a value higher than that of the water temperature will the red indicator light click on and the amber indicator light off. In this mode the heater is on and heating.

USEFUL TIPS

Remember to insulate and cover the water that is being heated wherever possible. This can speed up the heating process and reduce running costs.

Water absorbs heat very slowly, which means it can take a few days just to raise the water temperature by 15° at 1-kW per 1,000 gallons. This heat up time can be reduced dramatically when care is given over to insulation.