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4 Kwiksol Instruction, Installation & Warranty Manual
A circulating pump either electrical or a 12V Pump with a PV Panel can be used. The control
unit using two sensors constantly monitors the temperature of the solar flat plate collector
panel/s or solar vacuum tubes and the solar water heater, powering the circulation pump
only when the water (direct system) or propylene glycol (indirect system) in the solar flat
plate collector panel/s or solar vacuum tubes is hotter than the water in the solar water
heater.
When the temperature difference is less than the set point during the working process of
the circulating pump, the pump will stop. When the temperature of the water in the solar
water heater reaches the highest set point, the monitor will stop the circulating pump.
The electrical thermostat and element will automatically maintain the water temperature
of the upper part of the solar water. The set temperature on the thermostat must be
lower than the maximum temperature attainable on the solar flat plate collector panel/s or
manifold of the solar vacuum tubes.
Pumps must be installed in accordance with the manufacturers instructions with ease of
access for maintenance/repair.
E. SOLAR SYSTEM TYPES
1. Direct Frost Free System – Close Coupled and Split System
(Thermosyphon and Pumped Circulation Methods)
The Direct system with solar flat plate collector panels is used in areas where the ambient
temperature never falls below 5ໍC and the water quality is good (less than 600ppm total
dissolved solids/minerals).
The water to be used from the solar water heater circulates through the solar flat plate
collector panel/s, transferring solar energy into the storage tank. The solar water heater is
fitted with a thermostat and element in the event the solar energy is not strong enough to
heat the water to the required set temperature i.e. on overcast days and in the evening.
The Direct system can be installed as a close coupled system (thermosyphon circulation
method) or as a split system (themosyphon or pumped circulation methods).