EcoSolar Energy Conscious Design Limited
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Please note that the above will limit but not prevent Legionella from establishing its self in the hot
water cylinder. The shower head is most at risk most pipework is also a risk area. All the pipework
should be regularly flushed to limit the establishment of Legionella this is the case on all hot water
systems, more so where tempering valves are installed as the water downstream of the tempering
valve only reaches 45
O
C which is an optimum temperature for Legionella growth.
Solar System Control Using EcoSolar UVR 61 Solar Controller and One Shot
Back up Heating Controller
Overview
The UVR 61 Solar Controller is a multi function controller which automates the solar water heating
system. Temperatures within the solar collector, the bottom and the top of the cylinder are monitored
and displayed on the clear LCD screen. The backup heating system is managed automatically and can
also be initiated manually using the “One Shot” controller.
1.
Ideally the backup water heating systems should remain off.
2.
If the water is not up to temperature the solar controller will turn on the water heating at the
predetermined time
3.
Outside of the heater initiated times, the user should monitor the water temperatures at the top of
the hot water cylinder (usually T3).
4.
If the cylinder temperature has been limited, at this temperature the solar system will shut down
5.
If the water temperature is below the predetermined set point, press the boost switch, the green
neon on the “One Shot” will turn on
6.
The over ride button should only be used if there is significant water consumption
7.
If all the water has not been heated to 60 OC for a period of 7 days boost the cylinder water
temperature using the lowest electric element.
8.
If the cylinder has two electric elements, the top element is used to boost the water temperature,
the bottom element is only used for Legionella control or if a full cylinder of water is required. The
bottom element may/may not be controlled with a “One Shot” controller if it isn’t the main isolator
should remain switched off and only switched on as required above.
9.
If you go away on holiday the Home / Away button should be set to Away, this will stop the
cylinder from being heated everyday.
System Control
The UVR 61 Solar Controller is a multi function controller which automates the solar water heating
system. Temperatures within the solar collector, the bottom and the top of the cylinder are monitored
and displayed on the clear LCD screen. The solar heating pump is normally off and only turned on
when the collector is warmer than the bottom of the cylinder, i.e. there is heat to recover from the
solar collector.
The solar controller also has a defrost function which is initiated in open loop systems where the water
in the cylinder is circulated through the solar collector. The defrost function is initiated if the collector
temperature has dropped to a point where there is a potential of freezing, in which case, the controller
