Ozroll OZS251E, Installation Manual

Page: 24 / 36

H10. SYSTEM PIPING CONNECTIONS
Connect the piping and fittings as shown in the diagram. Run DN 15 copper tube up to the collector’s cold inlet
from the pump outlet. Run DN 15 copper pipe from the panel’s hot outlet to the cylinder’s solar return connec-
tion.
IMPORTANT NOTE: Copper pipes MUST slope upwards to the collectors. If the pipes do not continuously run
on an upwards slope towards the collectors then this will prevent the system evacuating all the air and will
therefore prevent the water from circulating.
H11. Temperature Sensor Fitment
The System Controller is supplied with three sensor leads, one long and two short. Unroll each lead in turn and
pass it through a small cable gland from the inside of the housing to the outside.
Connect the sensor leads to the System Controller – ensure that the short lead with the white end uses the con-
nector with the white band.
The long sensor lead is used to sense the temperature at the top of the collector. The short lead with the black
end is used to sense the temperature at the bottom of the storage tank. The short lead with the white end is
used to sense the temperature at the middle of the tank. Install all sensor leads carefully so as to avoid damage
to the cable or the sensor.
Install the thermocouple sensors into their respective sockets on the cylinder and panels. Do not seal the sock-
ets at this stage.
The sensor leads may be extended if required using suitable cable. Ensure that wires are properly insulated.
Connections should be made using solder and insulated with heatshrink to provide good mechanical support
and waterproofing.
H12. Preliminary System Test
When all connections have been tightened the system can be tested for pressure tightness.
Check for leaks.
A preliminary test may now be performed.
22
23