Solahart Streamline Owner's Manual page 20

INSTALLATION – SOLAR STORAGE TANK
FREEZE PROTECTION
The water heater has a freeze protection system. The water heater is not suitable for installation in areas
where the ambient temperature falls below -20°C.
The solar circuit must be installed with a continuous fall of a minimum 5° (1 in 10 grade) in the pipe work
from the solar collector to the solar storage tank, with the full length of the solar hot and solar cold pipes
insulated and the system charged with correctly mixed closed circuit fluid to offer protection against freeze
damage. The system has NO WARRANTY for freeze damage if there is not a continuous fall in the solar hot
and solar cold pipes, or they are not insulated in accordance with the installation instructions, or the closed
circuit fluid has been incorrectly mixed (refer to
"Warning: Plumber Be Aware"
The solar collectors and solar cold and solar hot pipes only contain closed circuit fluid when the pump is
operating during periods of solar gain when heating is required. When the solar pump stops operating, the
closed circuit fluid drains back into the storage tank heat exchanger. The closed circuit fluid is an anti-freeze
agent which, when mixed to the correct specification, can withstand temperatures of -20°C before it may
freeze.
Damage to the water heater caused by freezing of the pipe work to or from the water heater is not covered
under the Solahart warranty. Refer to AS/NZS 3500.4 for precautions to be taken for installations in frost
prone areas.
MAINS WATER SUPPLY
Where the mains water supply pressure exceeds that shown in the table below, an approved pressure
limiting valve is required and should be fitted as shown in the installation diagram
page 32).
Model
Relief valve setting
Expansion control valve setting *
Max. mains supply pressure
With expansion control valve
Without expansion control valve
* Expansion control valve not supplied with the water heater.
TANK WATER SUPPLY
If the water heater is supplied with water from a tank supply and a pressure pump system is not installed,
then the bottom of the supply tank must be at least 1 m above the highest point of the hot water plumbing
system, including the solar storage tank. Care must be taken to avoid air locks. The cold water line to the
water heater should be adequately sized and fitted with a full flow gate valve or ball valve.
"Terms of the Solahart Warranty"
on page 29).
270
1000 kPa
850 kPa
680 kPa
800 kPa
20
on page 57 and to
(refer to diagram on