DencoHappel ZGF.1E series Operation Manual page 47

Flex-Geko Fan Coil Unit
PR-2011-0115-GB • Subject to modifications • R4-12/2015
Valves with thermoelectric actuator
2-point operation (open/close) is possible with these valves. If 3-way valves are
fitted by the manufacturer, control is performed via a distributor circuit (refer to
Fig. 5-3).
Fig. 5-3: 3-way valves with thermoelectric actuator
With a 2-way valve control is carried out by throttling the medium supply (refer to
Fig. 5-4).
Fig. 5-4: 2-way valves with thermoelectric actuator
Thermostatic expansion valve
The thermostatic expansion valve is used for direct evaporation of refrigerant
(refer to Fig. 5-5).
Fig. 5-5: Thermostatic expansion valve with external pressure equalisation
Safety and User Instructions
47