Rheem Premier Hiline Owner's Manual And Installation Instructions page 8

ABOUT YOUR WATER HEATER
The recommended continuous length of time for boosting is:
Model
cold water temperature
180 Cool / temperate climate
Temperate / sub tropical climate
Tropical climate
300 Cool / temperate climate
Temperate / sub tropical climate
Tropical climate
The recommended boosting periods are sufficient to allow the booster heating unit to heat up the boost
volume of the solar storage tank to 60°C where the winter cold water temperatures do not fall below those
shown. This may be necessary during periods of very low solar energy gain through the solar collectors,
such as during constant rain or extremely cloudy weather, particularly in winter when the incoming cold water
temperature is lower. The period will also provide a sufficient heat up time for the electric booster to operate,
if required, to satisfy the requirements of AS 3498.
The booster heating unit will only activate if heating is required and power is available from the timer. When
the water is below the thermostat setting, the booster heating unit will turn on and heat the water. The
booster heating unit will automatically turn off either when the temperature of the water reaches the
thermostat setting or at the end of the timer period, whichever comes first.
PIPE WORK AND INSULATION
The solar hot and solar cold pipe work between the solar Premier Hiline storage tank and the solar collectors
are supplied in the pipe kit. The supplied copper solar hot and solar cold pipes MUST BE used.
If the solar water heater is installed either on a metal roof or in a trafficable area, such as on an accessible
roof, then the solar hot and solar cold pipes must be insulated. The solar hot and solar cold pipes may be
required to be insulated to comply with local regulations.
If insulation is required, the full length of the solar hot and solar cold pipes MUST BE insulated.
The insulation must:
be of a closed cell type or equivalent, suitable for a solar water heating application and capable of
withstanding the temperature of the water generated by the solar collectors under stagnation conditions
The specification of the chosen insulation material should be checked with the insulation manufacturer
prior to installation as different materials may vary in temperature tolerance.
be at least 13 mm thick, however thicker insulation may be required to comply with the requirements of
AS/NZS 3500.4
be weatherproof and UV resistant
be fitted up to and cover the connections on both the solar storage tank and the solar collectors.
The insulation will offer corrosion protection to a metal roof against water runoff over the copper pipe, assist
in avoiding accidental contact with the solar pipe work as high temperature closed circuit fluid can flow from
the solar collectors to the solar storage tank and also reduce pipe heat losses.
Plastic pipe MUST NOT be used, as it will not withstand the temperature and pressure of the closed circuit
fluid generated by the solar collectors under certain conditions
The pipe work between the solar storage tank and in-series booster (if one is installed) MUST BE of copper
and fully insulated with a closed cell type insulation or equivalent (minimum thickness 13 mm).
Minimum winter
10°C
15°C
20°C
10°C
15°C
20°C
Booster heating unit size
Temperature
2.4 kW
rise
50°C 2 ¼ hours
45°C 2 hours
40°C 1 ¾ hours
50°C 3 ¾ hours
45°C 3 ½ hours
40°C 3 hours
(refer to Warning on page
8
3.6 kW 4.8 kW
1 ½ hours 1 ¼ hours
1 ½ hours 1 hour
1 ¼ hours 1 hour
2 ½ hours 2 hours
2 ¼ hours 1 ¾ hours
2 hours 1 ½ hours
30).