Now the installation has been done it is time for Martyn Ives, Fujitsu’s technical manager to look at commissioning; an activity with which Fujitsu technical personnel often help.
To remind you, our theoretical two storey building, which we introduced in the previous columns, has a floor area of 160m2 per floor with open plan and cellular offices. Different tenants occupy each floor.
While, obviously, different equipment requires different commissioning, on the whole, the principles are the same.
Addressing the System
Addressing the system, so the indoor units will talk to the outdoor ones properly, can be one of the areas that gives the most problems, and the larger the system, the more involved the process.
Many systems offer auto-addressing as well as manual, but auto-addressing does not address in a logical way, so rooms next to each other can be wide apart in the numbering system, which adds an extra complication for the service engineer.
To help with commissioning, Fujitsu offers a powerful piece of software called Service Tool, which allows the commissioning or service engineer to check that all address settings are correct, and view all temperature and pressure readings from condensers.
Not all aspects of commissioning are quite so technical. For example, it is imperative to ensure the installation is correct to the design schematics. Visual checks need to be made on all pipe work and fittings before the builder makes them inaccessible, ensuring the pipe work is supported correctly and well insulated, and separation tubes and refrigerant branch boxes are installed at the correct angle as shown in the installation manual.
Do not forget to check the system is achieving the right temperatures and there are no noises that should not be there.
It is also important at this point to show anyone who is likely to be able to adjust the controls, how to do it properly without causing problems.
Next month – Aftersales.