21
4.2 Pressure Testing
4.2.1 Pressurise and inspect system
On completion of system filling, close the valve at bleed point
B
. This will cause the system
pressure to rise as the filling station pump will now be dead-heading. Using the regulator on
the filling station (if fitted) set the outlet pressure to 5.5 bar (or as high as possible if 5.5 bar
cannot be achieved).
Close the filling point ball valve and stop the filling station pump. Disconnect the filling
station hoses from filling point
A
and bleed point
B
. Check that neither valve is leaking fluid
Over a period of
at least 45 minutes
, inspect the complete installation for evidence of
leakage from any joints or pipework and repair as necessary. Monitor the system pressure –
if a pressure drop is seen, this indicates a leak. All leaks
must
be located and rectified as a
loss of system pressure may lead to freezing during the winter months, causing severe
damage to the system.
4.2.2 Set system pressure
Using the pressure relief valve (so as to confirm its correct operation) reduce the system
pressure to 3.5 bar by turning the head of the valve by hand. Ensure the valve closes when
released and that the flow of fluid ceases.
4.3 Sensor Installation
Referring to the Solar System Controller instruction booklet, install and secure the sensors in
the cylinder sensor pockets and wire the control unit. The panel sensor should already have
been fitted in Step 3.2.4.
•
Ensure sensor
T1
(with the
black cable
) is fitted in the
sensor pocket at the panel
and
that it is wired to the
T1 terminals
of the control unit.
•
Ensure sensor
T2
(with a
grey cable
) is fitted in the
lower sensor pocket of the
cylinder
and that it is wired to the
T2 terminals
of the control unit.
•
Ensure sensor
T3
(also with a
grey cable
) is fitted in the
upper sensor pocket of the
cylinder
panel and that it is wired to the
T3 terminals
of the control unit.
Figure 21: Sensor installation
If the sensors are not correctly located and wired, the system will not perform correctly and
may not operate at all.
If there is only 1 sensor pocket on the cylinder, install the T2 sensor in the pocket and do
NOT use the T3 sensor i.e. leave the T3 terminals of the control unit unwired.
T1 – Black Cable
to collector sensor pocket
B
ro
w
n
B
lu
e
SSC~ Control Unit
T1
T2
T3
T2 –
Grey Cable
to cylinder lower sensor pocket
T3 –
Grey Cable
(if fitted)
to cylinder upper sensor pocket
Summary of Contents for Solar SHP20
Page 2: ......
