Danfoss AKS 4100 - Page 4

© Danfoss | DCS (MWA) | 2016.01
DKRCI.PI.SC0.H1.02 | 520H10544 | 4
ENGLISH
Please observe that AKS 4100/4100U
is intended to always be installed in
a standpipe (column/bypass/stilling
well). A standpipe is commonly used
when:
• Servicing the AKS 4100/4100U
• There is highly conductive foam in the tank.
• The liquid is very turbulent or agitated.
AKS 4100/4100U Coaxial with or without
HMI does not need any change of setting
to operate.
Presetting:
4 mA : 230 mm (9.1 in.)
20 mA: 60 mm (2.4 in.)
Refrigerants
AKS 4100/4100U is designed to measure
liquid level in R717(ammonia) applications.
Basic data
AKS 4100/4100U is a passive 2-wire 4-20 mA
sensor that is loop powered.
Supply Voltage
14-30 V d.c. min/max. value for a max. output
of 22 mA at the terminal
Load
RL [Ω] ≤ ((Uext -14 V)/20 mA).
– Default (Error output set to 3.6 mA)
RL [Ω] ≤ ((Uext -14 V)/22 mA).
– (Error output set to 22 mA)
Cable gland
AKS 4100 PG 13, M20×1.5 ;
(cable diameter:
6-8 mm (0.24-0.31in.)
AKS 4100U ½ in. NPT
Terminals (spring loaded)
0.5-1.5 mm
2
(~20-15 AWG)
Enclosure
IP 67 (~NEMA type 4X)
Refrigerant temperature
–60°C/100°C (–76°F/212°F)
Refrigerants
The listed refrigerants are qualied and
approved by Danfoss:
R717 / NH3: –40°C / +50°C (–40°F / +122°F)
Ambient temperature
–40°C / +80°C (–40°F / +175°F)
For HMI : –20°C / +60°C (–4°F / +140°F)
Process pressure
–1 barg / 100 barg (–14.5 psig / 1450 psig)
Mechanical process connection 280 mm
(11 in.). 8 mm (0.3 in.) inner rod.
AKS 4100 G1 inch pipe thread.
Aluminium gasket included
AKS 4100U ¾ in. NPT
(Further details in the data sheet)
Mechanical Installation
Preparations prior to Mechanical Installation
Disassemble the Signal Converter from the
Mechanical process connection (use 5´mm
hex key, see g. 3). Fit the red protection
cover on top of the Mechanical process
connection to protect it againt any moisture
or dirt paticles.
Content supplied (g. 1)
1a: Signal Converter (with or without HMI)
2a: Mechanical process connection
If factory setting needs adjustment
Probe length, scale 4 mA and 20 mA for HMI
Quick Setup.
Probe length: 280 mm (11 in.)
Scale 4 mA: (for max. measuring range)
= Probe Length
– Bottom dead zone (see g. 2)
Scale 20 mA:(for max. measuring range:)
= Top dead zone (see g. 2)
Example (AKS 4100)
Given conditions:
Probe length: 280 mm
Refrigerant: NH
3
, –10°C
The gas constant Er is always adjusted
from the Quick Setup
Probe length:
= 280 mm
SCALE 4 mA setting for max. measuring
range:
= Probe length (280 mm)
– Bottom dead zone (see g. 2)
(40 mm) = 240 mm (9.4 in.)
SCALE 20 mA Setting for Max.
Measuring range:
= Top dead zone (see g. 2)
= 60 mm (2.4 in.)
From page 6:
Dielectric constant of refrigerant gas
parameter 2.5.3 GAS EPS.R
= 1.02
How to mount the AKS 4100/4100U
Converter (see g 3)
1. Using a 5-mm hex key, loosen the setscrew
in the Signal Converter.
2. Slide the Signal Converter down until
it rests on the mechanical process
connection.
3. Turn the Signal Converter to the wanted
position and tighten the set screw with a
5 mm Hexagon key
Electrical installation/connection
Output terminals (g. 4 and 5):
1. Current output –
2. Current output +
3. Grounding terminal
Electrical installation procedure
1. Use a 2.5 mm Allen wrench to loosen the
cover stop.
2. Remove the terminal compartment cover
from the housing.
3. Do not disconnect the wire from the
terminal compartment cover.
Put the terminal compartment cover
adjacent to the housing.
4. Connect the wires to the device.
Tighten the cable entry glands.
5. Attach the terminal compartment cover
to the housing.
6. Use a 2.5 mm Allen wrench to tighten the
cover stop.
Note:
The signal converter can be programmed
with or without mechanical process
connector assembled.
Start up:
• Connect the converter to the power
supply.
• Energize the converter.
Devices with the HMI display option only:
After 10 seconds the screen will display
"Starting up". After 20 seconds the screen will
display the software version numbers. After 30
seconds the default screen (g. 9) will appear.
Precausions when changing from
AKS 41/41U to the AKS 4100/4100U:
Please note:
The AKS 41/41U can be used with a.c. and
d.c. supply, but the AKS 4100/4100U can
only be used with a d.c. supply. Follow the
instructions in g. 6.
Connecting to controller or PLC
Follow the instructions in g. 7 or 8.
Quick Setup →