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Service/maintenance
Chapter 7 OPERATION MANUAL
V1.1.0en/13.12.12
Errors and omissions excepted. Water Cooler
47
7.3 Thermal fluid inspection, replacement and circuit cleaning
The figure »Thermal fluid replacement/inspection and internal cleaning« can be found on page 5.
7.3.1 Thermal fluid inspection
7.3.1.1 Externally open application
To replace the thermal fluid, proceed as described on page 36 in section »Externally open applicati-
on« . The draining and filling operations are described in this section.
7.3.2 Cleaning the thermal fluid circuit
Non-compliance with the safety data sheet for the thermal fluid to be used
INJURIES
Risk of injury to the eyes, skin, respiratory tract.
The safety data sheet for the thermal fluid to be used must be read prior to use and its contents
respected.
Observe the local regulations/work instructions.
Wear your personnel protective equipment (e.g. temperature-resistant safety gloves, safety gog-
gles, safety footwear).
Risk of slipping on dirt on the floor and around the workplace.
V07
Using acetone as an agent to clean the thermal fluid circuit
DAMAGE CAUSED BY LEAKS IN THE INTERNAL THERMAL FLUID CIRCUIT
Use only suitable cleaning agents.
H21
To avoid boiling delays with future usage (e.g. using a silicone oil at temperatures above approx.
100 °C), the internal components of the temperature control unit must be dried out.
PROCEDURE
Drain the temperature control unit and the externally open application as described on page 38
in section
»Draining externally open applications« .
After draining, residual thermal fluid can remain in the pump chamber and the internal lines. Leave
the temperature control unit with open valves for a while.
Disconnect your externally open application from the >Circulation flow< [1] and the >Circulation
return< [2].
Connect the >Circulation flow< [1] with the >Circulation return< [2] to the temperature control
using a bypass hose.
Fill the system (minimum fill level) with the cleaning agent. The description can be found on page
36 in section »Filling and venting externally open application« .
Vent the system as described on page 36 in section »Filling and venting externally open applica-
tion« .
Start the circulation . The time required will depend on the degree of contamination.
Stop the circulation .
Open the >Drain< [8] and draw off the cleaning agent through the drain hose into a suitable con-
tainer (e.g. original canister that is compatible with the cleaning agent).
Repeat the steps “fill”, “vent”, “start/stop circulation” and “drain” until the drained cleaning
agent remains clear.
Remove the bypass hose.
CAUTION
NOTE
.
INFORMATION
.