EcoSolar Energy Conscious Design Limited
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20.
Now press the right hand arrow
21.
F Check is displayed, this needs to be turned on, press the down arrow, press the right
hand arrow and press the up arrow to select.
22.
Now press the right hand arrow HQC is displayed, this is the heat counter, i.e adds up
the heat absorbed from the solar system, if it is to be initiated refer to the manual.
Controller user guides
The user guides for the ESR21 and the UVR61 are shown below, copies of these are
available from the website for inclusion in the operation and maintenance manual.
Solar System Control Using EcoSolar ESR 21 and One Shot Back up
Heating Controller
Overview
The ESR 21 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 manually
using the “One Shot” controller.
1.
Ideally the backup water heating systems should remain off.
2.
The user should monitor the water temperatures at the top of the hot water cylinder ( T3 ).
3.
If the water temperature is below the predetermined set point, press the boost switch, the
green neon on the “One Shot” will turn on
4.
The over ride button should only be used if there is significant water consumption
5.
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.
6.
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.
System Control
The ESR 21 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
