Extraordinary Maintenance - CTA HCAT TE 0011 Installation - Benutzungs- Und Wartungsanleitung

EXTRAORDINARY MAINTENANCE

CHEMICAL WASHING
You are recommended to chemically flush the plate heat
exchanger after every 3 years of operation. For instruc-
tions on how to carry out this operation, contact the man-
ufacturer.
REFRIGERANT GAS CONTENT
The condenser units are filled with R407c refrigerant gas
and tested in the factory. In normal conditions, there
should be no need for the Technical Assistance Service to
intervene to check the refrigerant gas. However, over time,
small leaks may develop at the joints leading to loss of
refrigerant and draining of the circuit, causing the unit to
function poorly. In this case, the leaks of refrigerant must
be identified and repaired and the refrigerant circuit
refilled. Proceed as follows:
- Empty and dry the entire refrigerant circuit using a vacu-
um pump connected to either the low or high pressure
tap until the vacuometer reads about 10 Pa. Wait a cou-
ple of minutes and check that this value does not rise to
more than 50 Pa.
- Connect the refrigerant gas cylinder or a filling cylinder
to the low pressure line pressure gauge connection
- Fill with the quantity of refrigerant gas indicated on the
rating plate of the appliance.
- Always check the superheating and subcooling values.
During nominal operating conditions, these should be
between 5 and 10 °C and between 4 and 8 °C.
- After a couple of hours operation, check that the liquid
indicator indicates circuit dry (dry-green)
32 English 07/03
In the event of partial leaks, the circuit must be
completely emptied before being refilled.
The units must be filled during the liquid
phase only.
Operating conditions other than nominal condi-
tions may produce considerably different values.
Seal testing or identification of leaks must be
carried out using R407 refrigerant gas, using a suit-
able leak finder.
The refrigerant circuit must not be filled with
a refrigerant other than that indicated on page 18.
The use of a refrigerant other than this could cause
serious damage to the compressor.
Oxygen, acetylene or other inflammable or
poisonous gases must never be used in the refriger-
ant circuit as they may cause explosion or poisoning.
Oils other than those indicated on page 18
must not be used. The use of oils other than those
indicated may cause serious damage to the com-
pressor.
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HCAT TE - HCAN TE