40 EN/09.2017/G44 © STULZ GmbH – all rights reserved
cybercool indoor chiller original instructions
If the water temperature passes under 5°C or if the outside temperature is less than 0°C, you must add an
anti-freezing agent. We recommend to add the following quantities of glycol (indicated as percentage of
weight of the water quantity):
Ethylene glycol Water or outside air temperature
20% until -9,0°C
25% until -12,3°C
30% until -16,1°C
35% until -20,4°C
40% until -25,2°C
45% until -30,8°C
50% until -37,6°C
Propylene glycol Water or outside air temperature
25% until -10,7°C
30% until -14,0°C
35% until -17,6°C
40% until -21,5°C
45% until -26,0°C
50% until -32,4°C
WARNING
Risk of glycol intoxication
Do not swallow ethylene glycol. Ethylene glycol is highly toxic in oral ingestion.
Lethal dose: 0,4 g ethylene glycol/kg body weight, severe intoxication: already at 0,1 ml/kg.
Glycol is absorbed through the skin. Therefore immediately change clothing soaked with glycol.
Wear protective gloves made of rubber.
6.2 Filling of the water circuit
6.2.1 Chilled water circuit
• Check whether you need an anti-freezing agent.
It is difficult to produce a homogeneous glycol mixture. You can purchase ready-made glycol mixtures.
• calculate the water content of the water circuit and the required amount of glycol.
• Fill the cooling medium circuit by means of the lling connections (see refrigerant diagram, part of the unit
documents).
• Bleed air from the cooling medium circuit by means of the schrader valves for bleeding (see following
pages).
• Fill the chilled water circuit by means of the lling connections (see refrigerant diagram, part of the unit
documents).
• Do not use the pumps in the unit to ll the water circuit.
• Fill the water circuit to an operating pressure of at least 1,5 bar.
• Bleed air from the chilled water circuit by means of the schrader valves for bleeding (see following pages).
6.2.2 Cooling medium circuit
To Next Page
Loading...
