Burkert 8622 User Manual

Ordering Information

Ordering chart for Flow Switch Controller 8622

Description Type Order Nr.

AC powered Flow switch Controller

3/4" BSP mounting thread 8622-A1M 417965K
3/4" NPT mounting thread 8622-A1N 417966L

DC powered Flow switch Controller

3/4" BSP mounting thread 8622-D1M 417967M
3/4" NPT mounting thread 8622-D1N 417968W

Only connectable to N-Chanel

!

flow switch versions type 8000

Flow/No-Flow Compact
Relay Controller
Type 8622
Owner’s Manual

©1998 Bürkert
All rights reserved.
434305X-Ind**/Jan99

does not provide an ample margin for such inrush currents.
be necessary for your installation if the 10 amp rating
use of a contact protection circuit or a stepper relay may
may be 10 to 20 times their steady-state load rating. The
are reactive and have an inrush current characteristic that
(such as a motor during start-up or incandescent lights)
The relay is rated for a 10 amp resistive load. Many loads

!

Relay Contact Rating:

by the warranty.
housing will not damage it. Such damage is not covered
ensure that compounds that may splash onto the controller
into contact with fluid. Refer to an industry reference to
be mounted in such a way that it does not normally come
the controller is not designed to be immersed. It should
and made of Polypropylene (PP). When installed properly,
The 8622 series of controller housing is liquid-resistant

!

Install In a Dry Location:

your Bürkert representative for further information.
suitability of a controller for your installation, consult
intrinsically safe rating. If you are unsure of the
explosive or flammable liquids, which require an
Compact relay controllers should not be used with

!

Flammable or Explosive Applications:

8622

recommended.
adjustments to powered controllers is not
extreme caution and use only insulated tools. Making
make adjustments during powered operation, use
prior to working on the controller. If it is necessary to
the relay circuit it controls should be turned OFF

serious injury or death. All power to the controller and
contact components that carry high voltage, causing
When the cap of the controller is removed, it is possible to

!

Electrical Shock Hazard:

tests of the installed system, and maintain all components.
appropriate for the application, install it properly, perform
user’s responsibility to select a controller model that is
different mounting and switching configurations. It is the
Bürkert manufactures several models of controller, with

!

User’s Responsibility for Safety:

Compact Relay Controllers from Bürkert
This manual includes information on Flow/No-Flow
INSTALLING OR USING THIS PRODUCT.
PLEASE READ THE ENTIRE MANUAL PRIOR TO

!

About This Manual:

Step One

SAFETY PRECAUTIONS

GUIDE T O CONTROLS

FLOWLINE

FLOWLINE

14 VDC 24 VDC

4-20 mA 100 mA

Step Three

Power indicator: This green LED lights when AC power is ON.

Relay indicator: This red LED will light whenever the controller energizes

the relay, in response to the proper condition at the sensor input and after
the time delay.

Power terminals:

AC Version: Connection of 240 VAC power to the controller. The setting
may be changed to 120 VAC if desired. This requires changing internal
jumpers; this is covered in the Installation section of the manual. Polarity
(neutral and hot) does not matter.

DC version: The terminals are located under the circuit card faceplate. For
access to the terminals, remove the single screw which holds the faceplate
to the enclosure. Then, carefully lift the circuit card from the slots in the
enclosure. The two DC power terminals are on the tall, removeable 2-pole
block on the opposite side of the relay from the 3-pole relay block. Insert
the (-) wire into the terminal next to the bottom of the card, and the (+) wire
into the second terminal.

Relay terminals (NC, C, NO):

AC version: The relay terminals are on a 3-pole block.
DC version: The relay terminals are on a tall 3-pole block next to the relay.

Connect the device you wish to control (pump, alarm etc.) to these
terminals: supply to the COM terminal, and the device to the NO or NC
terminal as required. The switched device should be a noninductive load of
not more than 12 amps (AC version), 6 amps (DC version); for reactive
loads the current must be derated or protection circuits used. When the
red LED is ON and the relay is in the energized state, the NO terminal will
be closed and the NC terminal will be open.

Invert switch: This DIP switch reverses the logic of the relay control in
response to the sensor: conditions that used to energize the relay will
make it turn off and vice versa.

Time Delay: After the input changes state, this control sets a delay from

0.15 to 60 seconds before the relay will respond.

Input 1A indicator: This amber LED will indicate a flow or no-flow
condition from the flow switch. With a Normally Closed switch, the LED will
be on for no-flow and off for flow. With a Normally Open switch, the LED
will be on for flow and off for no-flow.

Input terminals: Connect the wiring from the switch to these terminals:
Note the polarity:

AC and DC version: (+) is a 24 VDC, 100 mA power supply (typically
connected to the red wire of a Bürkert switch), and (-) is the ground for the
circuit (typically connected to the black wire of a Bürkert sensor). (S) is the
14 VDC switch terminal (typically connected to the white wire of a Bürkert
sensor). If polarity is reversed between the Red and Black wires, the
status of the FET switch will be reversed.

AC version:

Switch GND

(S) (-) (+)

R

DC version:

Delay

Invert Switch

(S) (+) (-)

SW

+

Com

DC

Power

- +

Relay

NC

Com

NO

-

INST ALLA TION

Step Four

3/4" BSP Mounting Thread

Installation of the compact relay controller takes advantage of the 3/4" BSP
thread located on its base. This makes the controller fully compatible with
any of Bürkert's level switches or Smart Trak™ or Switch Pak™ mounting
systems.

FLOWLINE

25.5 mm

1"

76.6 mm

3"

Always tighten the controller
from the wrench flat located on
the swivel base. Never tighten
from the body of the controller.

Switch Cable

When installing a Bürkert level switch, adjust the
cable away from the printed circuit boards in the
controller body. Avoid breaking the seal between
the top of the level switch and the plastic coated
cable.

FLOWLINE

FLOWLINE

Note: The 8622-A1M (417965K) requires that an "N-Channel" Thermo-

Flow switch be used. The 8622-A1M will not work with the "P-Channel"
Flow switch.

GND AC AC

Relay

DELAY

Com NO NC

I ( ON/OFF)

L (ON/OFF)

P

Changing from 240 to 120 VAC

First, remove the printed circuit board from the controller body. Use caution
when removing the PCB. Locate jumpers JWA, JWB and JWC on the end
of the PCB. To change to 120 VAC, remove jumper JWA and place jumpers
across JWB and JWC. To change to 240 VAC, remove jumpers from JWB
and JWC and place a single jumper across JWA.

240 VAC

JWB

JWC

120 VAC

JWB

JWA

JWA

JWC