Installation, operation and maintenance manual - SVER-type economiser
6/7
0005708 en 2017.01
Blanked off branches must be cut off at the cutting groove depending on metal thickness on ad-
joining tubes. Make sure that no dirt or other unknown elements enter the economiser during
installation.
Do not remove protective plugs and covers until immediately before installation.
The entire system must be clean before starting the operation. When fitting the tube connections,
make sure that stress in the economiser during test, operation and standstill does not exceed the
allowable values. Vibrations must be minimised, possibly by means of vibration dampers.
Apart from branch connections, welding must not be carried out on the economiser.
The economiser must be secured against exceeding the allowable pressures and temperatures.
All outer surfaces must have a corrosion-resistant surface coating to allow the economiser to be
installed in certain environments without it causing corrosion.
Safety equipment
Before the economiser is put into operation, it must be provided with safety equipment. The man-
ufacturer of the refrigeration plant is responsible for the safety equipment as it is not included in
the economiser delivery.
Bolted connections
Normal relaxing of the gasketed joints may occur in the interval between testing at the manufac-
turer’s and installation on site. Therefore, all external bolted joints may require retightening after
installation and, if necessary, after the economiser has reached operating temperature.
It is important that all bolted joints are tightened evenly and in a diametrically staggered pattern.
All bolts must be tightened to the same torque using a torque wrench.
Maintenance
The economiser should be inspected at the inspection intervals stated in the compressor specifi-
cation. Only qualified personnel must carry out inspection.
Operating experience will determine how often inspection of the economiser is needed. It de-
pends on the operating conditions. Johnson Controls Denmark recommends inspection to be car-
ried out in monthly intervals during the running-in period. After a running-in period of six months,
a maintenance plan must be made. Johnson Controls Denmark recommends inspection to be car-
ried out every third month as a minimum.
Do not disconnect or tighten connections when the equipment is under pressure.
Periodic inspection during the service life of the economiser must meet the requirements of na-
tional legislation or EN 378-2. Correspondingly, a visual inspection of connections, outer surfaces,
bases, the vibration damper and safety equipment must be carried out.
