4
SOLAR MECHANICAL PACKAGE
The Solar Mechanical Package contains all of the parts needed to operate a
closed-loop system, including filling, draining, etc. A fuller explanation of the
function of the components in the mechanical package is in the following
“Installation Manual”. In a closed-loop system the solar fluid is circulated
from the solar collector to the tank heat exchanger by means of a pump
whenever solar energy is available. The system is said to be closed because the
working fluid remains within the system and is never removed except for
maintenance.
All components of the Solar Mechanical Package, including
the pump, can become very hot during operation.
SOLAR HEAT TRANSFER FLUID
An antifreeze solution is the medium that transfers heat from the solar collectors to the solar storage tank.
The solution will be a 50-50% solution of propylene glycol and water, which is non toxic
(see attached
technical data sheet).
Freeze Protection -
The solution will prevent damage from freezing down to -50 degrees F.
High Temperature Protection -
The antifreeze solution has a higher boiling temperature than water.
Corrosion Protection -
The antifreeze solution has corrosion inhibitors for long service life.
Lubrication -
The antifreeze solution serves to lubricate the pump for long service life.
The solar fluid can be dangerously hot under certain conditions. Do not open the fill and drain valves
in the “Solar Mechanical Package” if hot.
THE SOLAR CONTROLLER
The Radiantec Solar Controller serves several useful functions:
•
Displays the temperature at important points in the system.
•
Operates the pump either fast or slow according to solar
availability.
•
Activates a heat dump.
•
Signals system malfunction.