Safety Regulations
Safety Equipment
12
Laird Technologies GmbH
Operation Manual
Date: 20-Apr-2014
Version: 1.0
Water-Water Cooler WW 3001
1104.00
3.4 Safety Equipment
PLEASE NOTE
The safety equipment listed below must be integrated in the local control environment by the customer,
unless otherwise noted. These works must be carried out solely by trained experts. All required information
can be taken from the wiring diagram shown in the addendum.
Safety equipment must not be modified, removed or taken out of operation. All parts of the safety equipment
must be accessible at all times.
Familiarize yourself with all safety equipment. This can prevent or minimize bodily harm and/or unit failure in
case of disaster.
3.4.1 Safety and Signalling Equipment included in the Unit
The unit is equipped with safety devices at critical spots (see Fig. 2).
Water throughput is controlled by a flow switch that must be integrated in the potential-free safety
circuit of the device to be cooled.
The maximum temperature of the cooling circuit is controlled by a fixed thermostat with an opener
contact that must be integrated into the safety circuit of the device to be cooled.
The maximum pump pressure is limited by a safety valve that by-passes the liquid stream when the
pressure pre-set is exceeded.
The level of the cooling fluid container can be monitored against the state
“
empty
”
Fig. 3:
Safety devices
1 Safety valve
2 Thermostat
3 Flow switch
4 Cooling container level sensor
1
3
2
4
