Zehnder Pumpen ZKH 20 Notice D'installation Et D'entretien page 15

Connecting the discharge pipe
The ZKH 20 discharge connection must be connected to the flexible vinyl hose D.
- Unroll the flexible hose D.
- Insert the hose into the discharge connection that has a built-in non-return valve (see fig. 5).
- Position the flexible hose in the upmost vertical position possible to avoid any kinking. It is recommended to make
a smooth turn to avoid the hose from kinking.
- Secure the hose by using the clamp E supplied (fig. 5).
The hose has an inner diameter of 10 mm and can be connected to a PVC pipe of larger diameter by a plastic
reducer connection (fig. 5.1). Provide a cable tie to secure the connection (fig. 5.2).
The ZKH 20 is fitted with a non-return valve to prevent re-activation.
3.3 CONNECTING THE ALARM
ZKH 20 is fitted with a detection system that can cut off the power supply to the connected appliance if the water
level rises too high. To connect the detection system, connect the other set of cables, black and grey (see "Alarm"
label), to the appliance (refer to the instructions of the appliance). See fig. 7.
NOTE: It is possible to connect the detection system to an external alarm (audible or visual, from1.5V to 230V)
by changing the connection of the detection system. ZKH 20 is controlled by a dry contact supplied NC
(normally closed). To connect the external alarm, this contact must be changed to NO (normally open, fig. 10). To do
this, open the cover (fig. 8), unplug the grey wire from its location and plug it to the free contact above (fig. 9).
- ATTENTION : The maximum current admissible for our detection system is 4 A.
- To protect the electrical components in the ZKH 20 once the alarm has been triggered, any water continuing to
fill the tank comes out through the overflow outlets of the tank.
3.4 MAINS CONNECTION
Connect the power cable F to the ZKH 20 (fig. 6) and then to the main power. Comply with local installation
requirements.
3.5 USE
Functional test
Before turning on the pump, make sure you remove the protective lock pin from the rear of the device. Fig. 4.
- Pour water into the tank.
- Check that the pump starts and stops when the water level drops.
- Check that there are no leaks in the connections.
ZKH 20 is ready to use. Example of an installation of a ZKH 20 see pg. 4.
4 STANDARDS
ZKH 20 conforms to the European directive on low voltage.
INTERVENTIONS
5
Disconnect electrical supply before working on the unit!
5.1 MAINTENANCE
This device does not require any special maintenance.
5.2 TROUBLESHOOTING
Fault detected
The pump doesn't start.
The pump does not lift.
GUARANTEE
6
ZKH 20 is guaranteed for 2 years for parts and labour, subject to correct installation and use of the unit.
INSTRUCTIONS INTENDED SOLELY FOR QUALIFIED PROFESSIONALS
INSTRUCTIONS INTENDED SOLELY FOR QUALIFIED PROFESSIONALS
Probable causes
The pump is not connected to the power
supply.
The lock pin has not been removed.
The unit is not leveled.
Power outage.
Float blocked.
Condensates inlet pipe blocked.
Noon-return valve blocked.
Discharge pipe blocked.
15
Action needed
Plug in the unit.
Remove the lock pin.
Check the unit with a leveling tool.
Check the main power.
Clean the tank.
Clean the inlet pipe.
Clean the valve.
Clean the discharge pipe.
EN