Installation principles
The design and correct installation of the system pipework contributes to the reliability of the equipment, irrespective of the type. Design problems seldom occur with packaged systems because they would be overcome during development, but attention must be paid to other systems.
When a large installation is programmed, a site survey is usually carried out. This is intended to plan pipework routes, the method of installing and the components necessary to ensure a trouble-free installation, and to foresee any snags which might lead to costly modifications afterwards. In many instances the installation of small systems is left to the discretion of the installing engineer.
A reliable system must take into account the following:
1 The condensing unit should be mounted on a level and solid foundation.
2 Accessibility to all components for service and maintenance should be ensured.
3 Tubing runs between the evaporator and the condensing unit should be made as straight as possible and by the shortest route.
4 Excessive pressure drop should be avoided.
5 Where possible, depending upon the method of fixing, suction and liquid lines should be run together to produce an effective heat exchange.
6 Oil traps must be provided to ensure adequate oil return to the compressor.
7 Pipework must be firmly supported.
8 Where pipework passes through walls, floors and ceilings suitable sleeves should be provided. When routed at floor level, pipework should be protected.
9 The structure upon which the pipework is to be installed should be examined carefully.
10 Flexible couplings should be provided where necessary.
It is not intended to cover the finer details of installation practice.