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Thermann Solar Hot Water System - Owners Manual
WARNING
ELECTRICAL COVER IS
ONLY TO BE REMOVED BY A
LICENSED ELECTRICIAN
DO NOT TOUCH
!
2. How Your Booster Works?
2.1 Boosting Explained
If the solar contribution during the day is not enough to raise the water to a suitable temperature, an
electric or gas booster can provide additional heating. During sufficient sunny weather, the solar collector
will normally be able to provide enough hot water, but during winter months and overcast days boosting
may be required.
2.2 Legionella Bacteria - The Importance of Boosting
It is a legal requirement that water be heated on a regular basis to kill Legionella bacteria that can lead to
Legionnaires disease. The frequency this temperature must be reached varies, and is explained below:
Type of Thermann System Installed
Minimum heat requirements
Bottom element electric boosted system Once per week to 60°C
Mid element electric boosted system
Once per day to 60°C
Gas Boosted Systems
Minimum 70°C each time water is used
2.3 Electric Boosted Systems
When the electric element is activated it will heat
up all the water above the element to 60°C (or the
thermostat setting). This heating can take as long as
3-4 hours if the tank is cold.
Note: Thermann recommends that the electric
booster is left on, or controlled by a suitable timer.
2.4 Gas Boosted Systems
The gas booster used on the Thermann system,
allows water to bypass the booster if higher than
57°C, this means water is only heated as required.
If the water is less than 57°C the gas booster starts
and “boosts” pre-heated water to 70°C. This “post
boosting” method supplies the household a virtually
unlimited supply of hot water.
Electric
Boosted Tank
Electrical
Cover
Heating
Element
WARNING
WHEN PTR VALVE IS LIFTED
HOT WATER WILL BE
DISCHARGED. ENSURE THE
PTR DRAIN PIPE IS CLEAR
PRIOR TO COMMENCING.
!
3. System Maintenance & Precautions
3.1 System Maintenance
•
Cleaning
- The Thermann tubes do not usually need cleaning, regular
rain and wind should keep the tubes clean.
•
Pressure & Temperature Relief Valve (PTRV)
- The PTRV is located
near the top of your hot water storage tank. It is designed to release
pressure in the tank as water expands and contracts during normal
heating.
The lever on the PTRV should be carefully lifted for a few seconds, and
placed down once every 6 months. This will help prevent any debris or
scale build up in the valve.
CAUTION: WHEN PTR VALVE IS LIFTED HOT WATER WILL BE DISCHARGED. ENSURE
THE DRAIN PIPE FROM PTR VALVE IS CLEAR.
•
Visual Check
- Thermann recommend periodic visual checks of your
system:
A. Check for leaks around the storage tank and pipework.
WARNING:
Pipework can be extremely hot, do not touch any exposed copper piping.
B. Ensure water is not entering the pump station.
C. If the tubes are safely visible from ground height, take a look at them
and ensure all tubes are still dark in colour.
(Note: If a tube is a milky/white colour the vaccuum
has escaped and the tube will not be working as efficiently
as it should be).
3.2 Glass Lined Tank Precautions
Glass lined (Vitreous enamel) tanks are fitted with a Magnesium
anode to provide corrosion protection for the tank from the stored
water. Thermann recommend the anode be inspected at least every
three (3) years, and serviced as required.
Small quantities of hydrogen gas can be released by the anode
which generally remains dissolved in the water. This is then flushed
away during normal use.
Depending on the water quality there may be a degree of hydrogen
build up in the tank
if the water heater has not been used for two
or more weeks.
To resolve the build-up of hydrogen within the
tank “purge” the tank for approximately 30 seconds from the lever
on the Pressure and Temperature Relief Valve (PTRV).
PTR Drain Pipe
Magnesium
“Sacrificial”
Anode
Thermann Tube
Collector
PTR Valve
Gas Boosted
Tank
Instant Gas
Booster
Solar Heated
Water
Min. 70°C
Water