Instruction & Technical Manual | 19
8.2 Energy management feature (EM)
8.2.1 Description
The purpose of the energy management feature is to save energy by reducing
compressed air consumption during periods of low demand by interrupting the normal
purge cycle. This can be activated with a link from the receiver upper and lower pressure
switches normally fitted to receivers.
In the case where the compressor is a continually running type or the dryer is remote
from the receiver then a dew point dependent switch can be used to activate the energy
management feature.
As standard, the energy management feature is supplied activated on all controllers.
When connected to an external switching system, the energy management process will
become operational. For systems where energy management will not be required, a
jumper link is fitted to the supplied DIN plug.
8.2.2 Energy management connection
1.
Remove DIN plug from EM
connection on controller.
2.
Remove blanking plug from cable
entry nut on DIN plug.
3.
Remove fixing screw and gasket from
DIN plug body.
4.
Separate DIN plug body internal from
cover.
5.
Remove jumper wire from pins 1 & 2
on DIN plug body internal.
6.
Connect external switching device
cable to pins 1 & 2 on DIN plug body
internal, ensuring that cable entry
nut, washer and seal are in place.
7.
Assemble DIN plug body internal into cover and reconnect DIN plug to EM
connection on controller, ensuring that screw and gasket are fitted.
8.
The controller gives a +5VDC from pin 1 on the EM DIN. Operation of the EM
feature is by opening and closing the circuit.
9.
Opening the circuit with an appropriate external relay or switch will activate the EM
feature.
The user must ensure that the EM DIN plug as supplied with jumper wire, or an external
switching arrangement is in place before the dryer becomes operational.
Ensure the energy management switching arrangement is in place before activating the
EM facility and flowing air through the dryer.
