Wiring Diagram And Terminal Functions - Danfoss EKC 315A Manual

Manual

Wiring diagram and terminal functions

Terminal
pairs
Switch function for start-stop of regulation. When there
is no connections between terminals 1 & 2, the controller
1-2
will send a signal to close the valve. If not using a switch,
terminals must be shorted with a jumper wire.
Current output that is used:
1. To control a motorized valve type ICM with ICAD
2-5 motor actuator, or
2. For remote monitoring when the ICM/ICAD is not
used (see parameter o09).
Optional relay output for control of a liquid line solenoid
9-10 valve. Control is based on thermostat setting. The relay
is closed on power failure.
Alarm relay. There is no connection between 12 and
12-13 13 during alarm conditions or when the controller is
not functioning.
Pressure transmitter, type AKS 33 or equivalent. Note:
14-15 controller powers the 4-20 mA loop (no additional
power source needed.
Pressure transmitter,
type AKS 33
Note: Each EKC 315A controller can
control a type AKV/A valve or an ICM,
but not both simultaneously.
12
EKC 315A Industrial Evaporator Controller
Description
Yellow (-)
Grey (+)
Optional analog
input from PLC etc.
USCO.PD.RD0.A1.22 / 521U0092
Terminal
pairs
Signal from TQ (discontinued valve actuator. See
17-18
Appendix 1 for TQ wiring diagram).
Optional current input from PLC or other source,
18-19 for offsetting the thermostat setting or superheat
reference.
Temperature sensor S2 (PT 1000) at evaporator outlet
20-21
for superheat.
Temperature sensor S3 (PT 1000) for thermostat
21-22
function controlling a liquid line solenoid valve.
24 Vac output for control of pulse width modulated
valve type AKV/A (Maximum 20Ws coil). Can also be
23-24
used to power the discontinued type TQ valve (see
Appendix 1 for TQ wiring diagram.
Supply voltage 24 Vac. 80 VA maximum load
25-26
depending on valve
Motorized modulating valve, type
ICM/ICAD, must be supplied with
24Vd.c. from an external source.
Green (-)
24Vd.c.
Brown (+)
Solenoid Alarm
relay relay
80 VA max load
AKV or AKVA pulse-width
modulation expansion valve
Note: controller powers the
24Va.c., max 20W coil
Description
© Danfoss USCO (HMR_MKS), 04-2008