Schniewindt ERCH User manual

Page 1 of 17
Created on 23.07.2020
en
For operation in industrial environments only!
Operation Manual
Screw-in Heater
Type : ERCH/ERCT/ERCB/ERCTB/ERCU
ERKH/ERKT/ERKB/ERKTB/ERKU
Schniewindt GmbH & Co. KG
Schöntaler Weg 46
58809 Neuenrade, Germany
Tel.: [phone]
Fax.: [phone]
[email protected]
www.schniewindt.de
Translation
Created according to regulations applicable in Germany.
ERCH/ERKH ERCT/ERKT
ERCB/ERKB
ERCTB/ERKTB

Page 2 of 17
Created on 23.07.2020
en
Table of contents
Intended use .......................................................................................... 3
General SafetyInstructions ..................................................................... 3
Identify unit ............................................................................................ 4
Type code .............................................................................................. 4
Product specifications ............................................................................ 5
Mounting instructions ............................................................................. 6
Mounting ................................................................................................ 6
Installation general ................................................................................. 7
8.1. Installation ERCH / ERKH ...................................................................... 8
8.2. Installation of units with rotatable element ............................................. 9
8.3. Installation of units with a red hood ...................................................... 10
Commissioning .................................................................................... 10
Controller setting .................................................................................. 11
Limiter setting ...................................................................................... 12
11.1. Limiter reset ......................................................................................... 12
Units with limiter, internal setting ERCB / ERKB .................................. 13
Units with controller and limiter ERCTB / ERKTB ................................ 14
Units with dry-running protection ERCU / ERKU ................................. 15
Repairs ................................................................................................ 15
Remedying malfunctions ...................................................................... 16
Repairs and maintenance .................................................................... 16
Dismantling .......................................................................................... 17
Storage ................................................................................................ 17
Disposal ............................................................................................... 17

1 Intended use
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Intended use
The unit is used for heating liquid or gaseous media.
The medium, the operating conditions and the installation position are tailored to the respective
application and listed in the order confirmation.
The unit is used for heating the medium specified in the order confirmation.
The operating conditions of the order confirmation must be observed.
Deviations from this are not allowed.
General SafetyInstructions
This Operation Manual contains basic instructions which must be followed during installation and
operation. The operation manual must be read and understood prior to assembly and commissioning.
Keep the Operation Manual for later use.
Pass on the Operation Manual to all subsequent owners and operating companies.
Do not make any modifications to the unit.
Modifications can disable safety devices and cause personal injury and property damage.
Modifications lead to invalidation of conformity.
If an installation position or flow direction of the medium to be heated is specified, this must be taken
into account.
Periodic inspections must be carried out in compliance with the national provisions.
The function of safety-relevant components must be checked prior to commissioning.
Any monitoring devices (e.g. for temperature, minimum flow rate or level) employed as safety devices
must be checked to ensure that they function properly in compliance with the relevant provisions.
The unit is not suitable for use in potentially explosive atmospheres.

3 Identify unit
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Created on 23.07.2020
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Identify unit
1 Type designation
2 Production number (Please specify when making inquiries)
3 Type code (see point )
4 Installation length in cm
5 Output in kW
Type code
ER***/**-**
Output in kW
Installation length in cm
No temperature monitoring
H = Hood
With temperature monitoring:
T = Thermostat controller
L = Limiter
TL = Controller and limiter
U = Dry-running protection
Tubular heating element material:
C = Steel
K = Copper
Type series
Screw-in Heater
Tubular heating element
1
3
4
5
2

5 Product specifications
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Created on 23.07.2020
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Product specifications
Name : Screw-in heater
For technical details see order confirmation.
Note:
Cable gland temperature range : -20°C (dynamic) to +100°C.
-40°C (static, briefly)
The cable glands can be used at temperatures of between -20°C and -40°C only if static stress is
present at the place of use. Static stress means that no other forces (impact, tension, pressure, etc.)
may act on the correctly mounted cable gland and its correctly installed line.
The screwing point, cable gland and inserted line must be in an idle position. A fixed cable gland must
be used. Instead of considering the cable gland as just a stand-alone component, the user must take
the sum total of the prevailing ambient conditions into account at the place of use.
At temperatures below -40°C, the sealing ring material CR/NBR starts to harden significantly and the
polyamide PA6 used tends to become brittle.
Temperature recording
The units must not be operated without appropriate temperature recording.
Install a suitable temperature control and/or limit on site if this is not installed by the manufacturer.
Refer to your order confirmation for the setting values.

6 Mounting instructions
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Created on 23.07.2020
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Mounting instructions
During operation, the minimum or maximum ambient temperatures at the connection
hood specified in these instructions must not be exceeded or fallen short of. If the
ambient temperature is different, the unit must be switched off (e.g. a suitable room
temperature controller or similar unit should be provided).
The connection head must not be insulated.
Max. permissible temperature in the connection area 80°C.
During operation, the unit must be covered by the medium being heated to prevent the
unit from overheating.
For this reason, a level monitor should be provided on-site in case of stationary media
to ensure that the unit can be operated only when the heating element is adequately
covered (approx. 50 mm).
In the case of flowing media, a flow monitor should be installed on site in the system.
The customer must protect the unit against overheating by appropriate flow and return of
the medium. Operation with non-flowing or incorrect medium as well as with a
system/housing that is not completely filled is forbidden, even for test purposes.
The medium must cover the heating pipe by a minimum of 50 mm. Air in the
system/housing (in the case of liquids) or dry heating can cause an irreparable defect of
the heating elements.
Mounting
Installation position horizontal
Mounting instruction:
 Use a suitable open-ended spanner.
 Use a suitable seal
The operator is responsible for the compatibility between the medium and the container
or seal material.
 Position the open-ended spanner only on the hexagon of the threaded flange.
Never apply force via the connection head.
 The thread must be in perfect condition.
 Firmly screw in the threaded flange.
 Retighten after heating up for the first time. (if necessary)

8 Installation general
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Installation general
The activities described below are reserved for qualified electricians.
The provisions of the DIN VDE 0100 (low voltage systems) and DIN VDE 0298-4 (high-voltage
systems) or the locally applicable regulations must be observed when planning projects,
selecting and installing the electrical system.
The electrical connections must be made according to the relevant VDE provisions and/or the
locally applicable regulations.
We recommend that a fault current monitoring device be provided.
 The connection voltage must match the voltage stated on the rating plate.
 Before opening the unit, it is absolutely essential to ensure that no voltage is present.

8.1 Installation ERCH / ERKH
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8.1. Installation ERCH / ERKH
The position of the cable gland can be adapted.
To do this, loosen the sleeve nut in the hood.
However, the hood may only be rotated a maximum of 45° to the right or left.
1. Loosen the sleeve nut
2. Remove the hood.
3. Make sure that the earthing cable has not become detached.
Max. tensile load of the earthing cable 10 N.
4. Insert the cables through the cable glands and into the connection hood. Tighten the cap nut
by hand by turning it to the right while holding down the nut below it. Tighten with the
specified torque to guarantee strain relief and protection class. (Cables and connections
must be compatible in order to guarantee the required protection class.)
5. Connect the cable according to the enclosed wiring diagram.
6. The customer must provide earthing with an open cable lug on the threaded flange. To do
this, loosen the countersunk screw in the spanner flat and push on the cable lug.
7. Check the connections for tightness.
8. Attach the hood
9. Fasten using the sleeve nut.

8.2 Installation of units with rotatable element
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8.2. Installation of units with rotatable element
The position of the cable bushing can be adapted.
To do this, loosen the threaded pins, but do not unscrew them completely.
However, the connection head may only be rotated a maximum of 45° to the
right or left.
10. For units with an external adjustment, pull off the scale lever.
11. Loosen the 2 countersunk screws on the front
12. Remove the hood.
13. Make sure that the earthing cable has not become detached.
Max. tensile load of the earthing cable 10 N.
14. Insert the cables through the cable glands and into the rotatable element.
15. Tighten the cable gland nut to guarantee strain relief and protection class. (Cables and
connections must be compatible in order to guarantee the required protection class.)
16. Connect the cable according to the enclosed wiring diagram. The wiring diagram is located
in the connection hood.
17. The customer must provide earthing with an open cable lug on the threaded flange. To do
this, loosen the countersunk screw in the spanner flat and push on the cable lug.
18. Check the connections for tightness.
19. Attach the hood
20. Attach the hood with the 2 countersunk screws.
21. For units with an external adjustment, put the scale lever back on

8.3 Installation of units with a red hood
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8.3. Installation of units with a red hood
1. Unscrew the cover of the connection head.
2. Make sure that the earthing cable has not become detached.
Max. tensile load of the earthing cable 10 N.
3. Insert the cable through the cable gland and into the connection head.
4. The cable gland nut must be tightened to guarantee the strain relief and protection class.
(Cables and connections must be compatible in order to guarantee the required protection
class.)
5. Connect the cable according to the enclosed wiring diagram. The wiring diagram is located in
the connection hood.
6. The customer must provide earthing with an open cable lug on the threaded flange. To do this,
loosen the countersunk screw in the spanner flat and push on the cable lug.
7. Check the connections for tightness.
8. Screw on the cover of the connection head.
Commissioning
1. Before switching on, make sure that all lines are connected properly.
2. Before switching on, make sure that the heated length is fully covered by the medium.
3. Make sure that the temperature limiter (installed or on-site) has been properly connected.
4. Set the temperature controller (installed or on-site) to the required temperature.
5. After the controller has been set, the connection head must be properly sealed.