49
cybercool indoor chiller original instructions
© STULZ GmbH – all rights reserved EN/09.2017/G44
tightness
A lack of water in the circuit is replaced by air, which reduces the heat capacity of the chilled water circuit and
is detrimental to the pump. A level indication at the storage tank, if existant, can give information about chan-
ges of the water quantity.
• check the water circuit visually for tightness.
Condenser (only at g, ge)
• Check the water side pollution of the plate condenser by comparing the cooling water inlet temperature to
the outlet temperature. If the difference is less than 3 K, it indicates a limited heat transmission and thus
pollution.
Another possibility to verify this consists in the comparison of the outlet temperature with the medium con-
densation temperature (by measuring the condensation pressure at the high pressure side of the compres-
sor). If this difference exceeds 7 K, the condenser is probably polluted.
• In this case clean the condenser chemically.
7.4 Water circuit
7.5 Unit housing
electrical box
• check the connection terminals for tight fixation when the unit is installed and once again after an operation
time of 30 days.
Unit interior
Clean pipes simplify the search for leaks.
• clean the unit‘s inside with a vacuum cleaner.
Vibrations of pipes and circuit components can result in leaks.
• check the pipes for a tight seat.
Condensing air humidity on cold water pipes means a loss of cooling capacity.
• check the insulation of the water piping.
daNgeR
Mortal danger by electric hazard
When the master switch is switched on and the controller is stopped, the power contactors are
live, even if the components are not operating.
At the fan contactor, dangerous voltages occur. Do not open the unit within the first 5 minutes
after disconnection of all phases.
In units with 2 or 3 fans dangerous charges of >50µC can occur between AC line terminals and
PE after disconnection.
