33 - Installation and application -
INSTALLATION AND APPLICATION
Only qualified personnel must carry out installation work on the refrigerant pump!
8.1 PREPARING FOR INSTALLATION
Before the pump will be installed, the following functions should be carried out:
Unpack the pump and check for possible damage during shipping and the correct scope of
equipment supplied. In case of any damages, inform your supplier immediately.
Remove all plastic caps or other sealings immediately prior to installation of the pump.
Check that the conical suction strainer has been supplied and that the gaskets are on both
sides of the suction strainer mounting ring.
The gaskets must be lightly covered with oil.
The gaskets must be clean.
Make sure all equipment connections are clear of plastic caps and rags.
The piping system is to be clean and free of any moisture.
Electrical wiring and control systems as well as integra-tion of the pump in the onsite pro-
tective conductor system should be carried out according to national regulations and codes
of practice.
The pumps have undergone a short mechanical test run at ambient temperature with
mineral refrigerant machine oil in the factory. If the pump is to be used in systems
where contamination with mineral oil is not allowed, i.e. in cases with ester oil in the
system, the residual oil must be removed and the pump cleaned by use of solvents.
8.2 MOUNTING INSTRUCTIONS
The pump is equipped with appropriate U-base to be used for assembly.
Align the pump horizontally and connect without inducing stress to the base frame and the pipe
work. (see installation instructions for fitting pumps to a piping system, available on the WITT
website). Special attention must be paid to the expected pipe contraction at low temperatures.
When welding to WITT stop valves, the valves should be in a half open position with
wet cloths around the valve packing.
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