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The water heater boost should remain on unless you plan to be away from home for length of time.
If you need to switch the system off (system close down), switch off the electrical water heater isolating switch
(electric element boost heating), switch off the power to the Solar Control Unit (solar heating), Shut off the cold water-
in to the DuoValve (point C) and close the Shut-off ball valve (point E) on the Solar control kit.
To turn on the water heater
Open the DuoValve (point C),- this allows cold water to enter the solar tank, switch on the Solar Control Unit and
open the Shut-off ball valve (point E) on the Solar Control kit, If the solar collectors have been drained then follow the
instructions in section 14 of this document (14. Priming and filling the system).
Heater Boost control
Under ideal conditions, your solar hot water will be kept up to temperature by the solar collectors. However on cloudy
and overcast days and during the winter months, the boost heating element inside the solar water tank (electric boost
systems) may be activated to maintain your water temperature. The heating element (immersion heater), must have
its own dedicated electrical supply and must remain connected to the electrical supply at all times.
Water pressure
The water pressure used with this Solar Hot Water system must be a minimum of 200kpa.
Tank Sizes
160 litre 1140mm(h) x 580mm dia. 250 litre 1620mm(h) x 580mm dia. 315 litre 1980mm(h) x 580mm dia.
Solar collector roof space required
1 collector 1.2m(w) x 1.8m(h) 2 collectors 2.4m(w) x 1.8m(h) 3 collectors 3.6m(w) x 1.8m(h)
Note:
All installations must be carried out by authorised plumbers or other authorised persons.
Installer - Please familiarise yourself with all the diagrams and pictures before starting to connect the system
together. Installation instructions begin at section 10.
Some diagrams/pictures are representative only and some pictures are shown before pipe insulation has
been fitted for clarity. To comply with AS2712 certification, the plumbing between the solar hot water tank
and the solar collectors must be installed using 12mm internal pipe diameter with insulation thickness of
40mm on the inlet pipe and 12mm internal pipe diameter with insulation thickness of 40mm on the outlet
pipe, both pipes using insulation material to ISOpipe insulation standards. For Gas Boosted systems the
pipe between the Solar preheat tank and Gas Booster must use Armaflex 32mm thickness insulation.
2. About your Suntrap Solar Hot Water System
Congratulations
for choosing a Suntrap Solar Hot Water System. All the systems are designed to have the Solar Collectors
mounted on the roof, and the Solar tank installed at ground level. Three sizes of Everlast Stainless steel solar hot water tanks
are used and have either an electric or gas boost as supplementary heating sources. Tanks have capacities of 160, 250 or
315 litres with either a 3.6 KW heater, or a Bosch 21e/26e gas heater.
The Solar Tanks are suitable for installations either inside or outdoors. If the area in which the system is to be installed is subject to
freezing conditions, then the hot and cold solar copper pipes must be fully insulated with closed cell polymer insulation to offer
protection against freeze damage.
All electrically boosted Suntrap Solar Hot Water systems are certified to be connected to a dedicated Off Peak 1 electrical supply.
Risk of scalding
Be aware that the solar hot water temperature can cause scalding. Check the temperature before use. A temperature limiting
device (Tempering Valve) is provided with all Suntrap Solar Hot Water kits and must be fitted to avoid very hot water from the
hot taps (bathrooms, showers etc.)
Temperature adjustment
On electrically boosted systems, the solar tank thermostat determines the tank temperature during off-peak boosting and may be
adjusted by a licensed tradesperson if required. The Tempering Valve is required to prevent scalding as solar hot water can
be much hotter than just electrically heated water. The Solar Control Unit will control the solar pump to circulate the water
when there is a temperature difference of 9 degrees centigrade or more between the tank temperature and the solar collector
outlet temperature, or when the temperature of the solar collectors are +3 degrees centigrade (to prevent the solar collectors
from freezing).
The Solar Tank thermostat temperature has been factory set and should not require adjustment. The water heater is supplied with
a Pressure and Temperature Relief valve (PTR 850 Valve) which must not be tampered with.
Safety
The tank is supplied with a Pressure and Temperature Relief valve, a Pressure Limiting Valve, and a thermostat. These devices
must be kept in working order at all times. High temperatures can exist in the solar pipes and precautions must be taken to
avoid young children touching them.
If any power cords or plugs are damaged, then these must be replaced by a licensed electrician.
To turn off the hot water
