Unit installation

CONNECTIONS – PLUMBING

BLEED VALVE DRAIN

A copper drain line must be fitted to the bleed valve to carry the discharge clear

of the water heater and solar control unit. Connect the drain line to the bleed

valve using a disconnection union. The pipe work from the bleed valve to the

drain should be as short as possible and fall all the way from the valve with no

restrictions. It should have no more than three right angle bends in it. Use DN15

pipe.

The outlet of the drain line must be in such a position that flow out of the pipe

can be easily seen (refer to AS/NZS 3500.4) - but arranged so water discharge

will not cause injury, damage, nuisance or splashing. The water discharged may

be of a high temperature and even very high temperature steam can be

generated under certain conditions. The drain line must be fully insulated with

closed cell polymer insulation or similar (minimum thickness 13 mm). The

insulation must be weatherproof and UV resistant if exposed.

Warning: The solar collectors can generate very high temperature water and

even very high temperature steam can be generated under certain conditions

when the bleed valve is opened. It is strongly recommended pipe work

downstream of the bleed valve be capable of carrying water exceeding 93°C.

Failure to observe this precaution may result in damage to pipe work and

property.

SADDLING - PIPE WORK

To prevent damage to the cylinder when attaching pipe clips or saddles to the

water heater jacket, we recommend the use of self-drilling screws with a

maximum length of 13 mm. Should pre drilling be required extreme caution must

be observed when penetrating the jacket of the water heater.

Note: If the cylinder is damaged as a result of attaching pipe clips or

saddles to the jacket, any resultant faults will not be covered by the

manufacturer’s warranty.