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6
Pre-Installation Notes
Solar hot water systems should be designed and sized correctly before commencing the installa-
tion. Proper design will ensure that a system is correctly sized to provide many years of optimised
performance and most or all of the required hot water when the most solar radiation is available.
However a supplementary heating system such as oil or has boiler, heat pump or wood boiler is re-
quired for months which have less solar radiation. This guide will illustrate and explain how a system
should be installed to confirm to the Joule manufacturer guidelines for the Navitas product models.
Using this guide stages of a solar installation are described in the following pages, with illustrations
where necessary to explain how to install the relevant components, and contains general recom-
mendations and important safety information.
Handling Guidance
• Tube and manifold boxes should be transported horizontally
• Heavy goods should not be loaded on top of the kit boxes
• Care should be taken when opening boxes to prevent scratches or sudden shocks to the glass.
• Do not use sharp ojects to open the tube boxes
Installation Guidance
• Unpack and install tubes only after the manifold and pipe work has been installed
• Do not leave the solar collector exposed to solar radiation when the solar loop and manifold
have been drained. Collecters left exposed in a dry state must be covered to prevent possible
long term damage.
• Tubes must have a miniumum elevant of 20 degress and a maximum or 70 degrees. The pipe
work of the solar collecter loop is to be earthed and the collector is to be lightening protected in
accordance to local regulations.
• A solar panel installation must be perofrmed in accordance with all Health & Safety legislation
and local building/planning regulations for the relevant jurisdiction. Furthermore, the necessary
electrical work required to install control equipment should be undertak- en by a qualified elec-
trical contract.
Sizing of safety equipment
Component sizes are relative to the volume of liquid in the system
Pipe sizing (minimum of 15 mm diameter pipework must be used).
Flow Rate And Pressure Calculation
No. of
Tubes
Flow Rate
ltr/hr
Pipe Diameter
Copper External
(“BSP)
20 Tube
System
(mbar)
30 Tube
System
(mbar)
40 Tube
System
(mbar)
20
120
3/4”M
8.54
1.18
4.11
30
240
3/4”M
17.08
2.36
8.22
40
360
3/4”M
25.14
5.74
20.94
