Operating and installation instructions
08.02.2021 – Version 1.1
Dry cooler
X-TDH.3-100-22-G-N-D5-BC-04
Page: 20/31
Operating and installation instructions for dry cooler translation into English © thermofin GmbH
NOTE
NOTE
4.5 Piping connection
Soldered or welded units or units closed with counter flanges are delivered with an overpressure of
approx. 1 bar (cleaned and dried air) (according to the regulation for the transportation of hazardous
material ADR 1.1.3.2 c).
Before opening the unit, it must be verified that the overpressure is present.
A depressurized unit indicates a leakage (Damage in transit! Leak test!).
In case of depressurized units, the manufacturer must be consulted immediately.
Before assembly, the transport pressure must be released and the closing caps must be removed.
Pipe connections must be designed in such a way that any force, stress and vibration effects
on the unit are prevented.
In access lines, a fixed point must be provided at a distance of max. 500mm from the unit connection.
Follow inlet and outlet
according to the marking.
Flange seals on dry coolers must not be greased, sealing surfaces must be clean, bright
and even.
4.5.1 Peculiarities of the dry coolers
Since a complete emptying of the unit cannot be guaranteed with dry coolers, the system must be
rinsed with antifreeze after the leak test with water if there is a risk of frost. The rinsing takes place
by means of a pump which is connected to the drainage port of the unit via a hose connection. Before
this, the unit must be shut off from the heat transfer medium circuit. The antifreeze, mixed with water,
escapes through the venting nozzle and is fed into a collecting container from which the pump sucks
in again. In order to ensure sufficient mixing, at least a 10-fold circulation is required. The frost
protection achieved can be determined from the mixture in the collecting container.
