Solahart 151J, Руководство пользователя

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FACTS YOU SHOULD KNOW ABOUT YOUR WATER HEATER
11
Over-Temperature Protection System
The Closed Circuit Series solar water heaters have a means of controlling the maximum temperature of the water in the
storage tank. These systems may be installed with a ‘HartStat’ valve located between the hot outlet of the collectors and
the inlet to the tank heat exchanger. This valve closes when the tank has reached a sufficiently high temperature, thereby
preventing further heat transfer to the tank, and thus limiting its temperature.
The Open Circuit Series systems may be installed with a ‘TRV’ located between the cold inlet of the tank and the cold inlet
of the collectors. This valve restricts the flow through the collectors when the tank has reached a sufficiently high
temperature.
PR6 / PR200 Jacket Pressure Relief Valve
The Closed Circuit Series tank’s heat exchange jacket has a pressure relief valve located in the vent pipe of the jacket. This
relief valve is to prevent over-pressurisation of the closed circuit either due to incorrect filling or abnormal operating
conditions. During the water heater's first summer season, fluid will discharge from the relief valve until the ideal closed
circuit fluid volume is established. Discharges from the valve after this time could indicate the water heater is not operating
efficiently. Under these circumstances contact your nearest Solahart dealer immediately. Do not attempt to service the
water heater yourself.
When operating in daylight, the heat exchange circuit will be pressurised and will contain a mixture of superheated water
and steam. Do not remove the PR6 / PR200 valve during operation as there may be a very high SCALDING risk present.
Period of Reduced Usage or Holidays
Warning : If the water heater is left unused for two weeks or more, flammable hydrogen gas may accumulate in the
water cylinder.
To dissipate this gas safely, it is recommended that a sink hot tap be turned on for several minutes. Do not use a
dishwasher, clothes washer or other appliance for this purpose. During this procedure there must be no smoking, open
flames or any electrical appliance operating nearby. If hydrogen is discharged through the tap it will make an unusual
sound like air escaping.
Temperature Redistribution
A lower water temperature may be noticed in the morning when the booster heating unit has not been energised overnight.
This temperature reduction is caused by the transfer of heat energy overnight from the hot water in the upper part of the
storage tank to the cold water in the lower part of the storage tank. This effect is often perceived as heat loss, but is actually
the redistribution of stored heat more evenly over the entire contents of the storage tank. This heat is not lost to the system.
Temperature redistribution is more prevalent the more hot water is used the night before or if the booster switch or time
clock is left OFF over-night and in particular may be experienced during periods of low solar energy gain, such as during
the cooler months. Temperature redistribution can also occur during days of lower solar radiation particularly during the
cooler months if power to the booster heating element is not available, or the booster switch or time clock is left off.
If higher temperature water is required, particularly in the morning, then use of the booster heating unit is necessary to
raise the temperature of the water in the top section of the cylinder. Refer to
“In-tank Boosting”
on page 12.
If the water heater is connected to an Off-Peak (overnight) electricity supply, then switching to an Extended Off-Peak
(overnight and day) supply should be considered. If a timer is being utilised, then a timed boost period in the afternoon
prior to the evening usage should be considered.