Stulz MUS 500 User manual

MASTER SLAVE CONTROL UNITS
INSTALLATION AND OPERATING INSTRUCTIONS
Issue 1.97e
AIR CONDITIONING
We reserve the right to make technical changes
Û

2
List of contents
Notes on safety ...............................................................................................................3
Customer service ............................................................................................................5
1. Technical description ..............................................................................................6
1.1 Technical data.................................................................................................6
1.2 Type clarification.............................................................................................6
1.3 Application limits.............................................................................................7
1.4 Dimensions.....................................................................................................7
1.5 Design ............................................................................................................8
2. Switching operation ................................................................................................ 9
2.1 Circuit diagrams............................................................................................10
2.2 Microprocessor printed circuit board/amplifier printed circuit board .............10
2.3 Connection cables between master and slave .............................................10
3. Installation.............................................................................................................34
3.1 Delivery and supply of units..........................................................................34
3.2 Installation of control unit..............................................................................34
3.3 Connection of cables ....................................................................................35
4. Commissioning/operation .....................................................................................37
4.1 Operating the system ...................................................................................37
5. Maintenance .........................................................................................................39
6. Dismantling and disposal......................................................................................40
7 Information about the EMC law according to CE-guidelines.................................41

3
These operating instructions are to be read carefully and to
be complied with before installation and operation.
It is absolutely essential to comply with the measures listed
in the chapter on notes on safety.
Notes on safety
General
These operating instructions contain basic information which must be complied with for
installation, operation and maintenance. They are therefore to be read and to be complied
with by the fitter and the responsible trained staff/operator before assembly and
commissioning. They must be permanently available at the place where the system is
used.
Not only are the general notes on safety listed under this section “Notes on safety” to be
complied with, but also the special notes on safety included in the other sections.
Personnel qualifications and training
The personnel responsible for operation, maintenance, inspection and assembly must
have the appropriate qualifications for this work.
Hazards resulting from non-compliance with the notes on safety
Non-compliance with the notes on safety can endanger personnel as well as the
environment and the system. Non-compliance with the notes on safety may result in the
loss of any claims for damage.

4
Safety conscious work
The notes on safety listed in these operating instructions, the existing national regulations
on accident prevention as well as internal notes on work, operation and safety are to be
complied with.
Notes on safety for maintenance, inspection and assembly work
The operator has to ensure that all maintenance, inspection and assembly work is carried
out by authorized and qualified trained staff who are informed by means of an indepth
study of the operating instructions.
Work on the system must only be carried out when it is shut down. It is absolutely essen-
tial to comply with the procedure described in the operating instructions for shutting down
the system.
During maintenance worktheunit/systemmustbede-energizedandpreventedfrombeing
switched on unintentionally by a warning sign.
The de-energized state of the unit or the system must be checked.
Before recommissioning the preparatory measures listed under the “Assembly/
Commissioning”instructions are to be complied with.
Independent conversion and replacement parts manufacture
The system may only be converted or modified after consultation with STULZ. Original
replacement parts and replacement parts/accessories authorized by STULZ help safety.
The use of other parts may invalidate the equipment warranty.
Unacceptable operating methods
The operating safety of the system is only guaranteed when it is used as intended.
The limit values assumed in the technical data must not be exceeded under any
circumstances.
This symbol indicates special measures or hazards to
which it is essential to pay attention.

5
Customer service
Customer service ensures optimum operational safety by means of preventative
maintenanceandrepairwork during theentire service lifeof yourSTULZ productorsystem.
You can contact customer service at:
ADDRESS -Telephone number - FAX

6
1. Technical description
The control unit for the ENS and BNB ultrasonic humidifiers are ready wired and tested.
The humidity sensors, the sensor for water quality, the humidifier itself and the power
connection have to be connected before the humidifying system can work.
The master/slave control concept permits all actuations of up to 10 humidifiers of the
highest output including drain valves or 30 humidifiers of the highest output without drain
valve tobemonitored, operatedand controlledbythe ultrasoniccontroller, amicroprocessor
in the master control unit.
The compact design permits servicing from the front only by removing the cover.
1.1Technical data
MUS 500 MUS 1300
SUS 500 SUS 1300
- Supply voltage V 110 110
208 208
230 230
400 400
460 460
- Frequency Hz 50/60 50/60
- Transformer output VA 500 1300
- Weight Kg 6,2 14
- Dimensions
Depth mm 220 220
Width mm 260 260
Height mm 400 400
1.2 Type clarification
MUS 500-230
M = Master control unit
S = Slave control unit Ultrasonic-
humidifier supply voltage
transformer
output in VA

7
1.3 Application limits
Supply voltage : ± 10%
Temperature : max. 30°C
Output load :
Drain valve : max. 10 STULZ valves (48 VAC-5 A = 240 VA)
Inlet valve : max. 48 VAC-5 A = 240 VA
Alarm output : max. 48 VAC-3 A = 144 VA
Humidify 1 : max. 15 ENS 18 humidifiers (24 V-150 mA)
Humidify 2 : max. 15 ENS 18 humidifiers (24 V-150 mA)
Do not install in rooms with high dust load or chemical loading.
1.4 Dimensions
Slave Master
OPERATION ON/OFF ON/OFF
TEXTS
DEPTH: 220 mm DEPTH: 220 mm

8
1.5 Design
Slave Master
The control units include:
- Transformer
- Contactors (electro-mechanical)
- RC elements for removing voltage peaks
- Suppressor diodes
- Solid state relay
- Microprocessor printed circuit board (Master)
- Amplifier printed circuit board (Master)
- Terminal strip
- Display and operating display (Master)
- Automatic circuit breakers
- Operating humidity (Slave)
- Switches
- PG sockets.
TRANSFORMER TRANSFORMER
MICROPROCESSOR PRINTED CIRCUIT BOARD
MICROPROCESSOR PRINTED CIRCUIT BOARD

9
2. Switching operation
The control unit always controls the humidifiers proportionally (continuously variable) via a
solid state relay (wear-free).
Bi-directional suppressor diodes are provided in parallel with the solid state transducers to
protect against voltage peaks.
Forinherent safety(bathfeedback),contactors withspecially calculated coilsandprotective
RC attenuators are installed to protect the level monitors.
The unit is intended for room humidifiers with only one sensor and also for duct humidifiers
with two humidity sensors.
The control unit can be set-up to operate with humidity sensors of various types and
without sensors for connection to an external controller, via DIP switches on the
microprocessorprinted circuit board.(Detailsin the operating instructions for the ultrasonic
controller)
The ultrasonic controller microprocessor with the appropriate inputs is required only in the
MASTER control unit for each humidifier system. All additional humidifiers in the system
are controlled by the more cost effective SLAVE control units.
The ultrasonic controller includes the following functions:
- Conductivity measurement
- Proportional adapter
- Proportional controller
- Signal converter
- Maximum limiting
- Limit value monitoring
The circuit diagrams, connection diagrams and wiring diagrams can be seen clearly on
the following pages.

10
2.1 Circuit diagrams (Pages 11 to 31)
Page
1.1 Master control unit ENS 14/18 11
(MUS 1300) ENS 14/18 IF
BNB 8000
1.2 Master control unit ENS 1200-9600 15
(MUS 500)
1.3 Master control unit BNB 1000-5000 19
(MUS 500)
1.4 Slave control unit ENS 14/18 23
(SUS 1300) ENS 14/18 IF
BNB 8000
1.5 Slave control unit ENS 1200-9600 26
(SUS 500)
1.6 Slave control unit BNB 1000-5000 29
(SUS 500)
2.2 Microprocessor printed circuit board/amplifier
printer circuit board 32
2.3 Connection cables between MASTER and SLAVE 33

11
MUS 1300
MASTER control box
ULTRASONIC ENS 14/18, ENS 14/18 IF, BNB 8000
Wiring colours:
DA.C.conductor L1, L2, L3: black
Current-carrying Mp: light-blue
Protective earth conductor green-yellow
Alternating current control cable: red
Direct current control cable: blue/red
Controller cables: brown
Measuring leads: brown
Interference voltage: orange
Voltage details:
Connected load: 1.3 kVA
Input to network: 230 V, 50 Hz, 1~, PE, N
Control voltage: 24/48 V
Lamp voltage: 230V
Terminal strip summary:
XAO: SUPPLY
X1: CABLES TO FIELD UNITS
X2: CABLE TO SLAVE
X3: CABLE TO HUMIDIFIER
X4: DOOR TERMINAL STRIP
X6: CABLE TO SENSORS

12

13

14

15
MUS 500
MASTER control box
ULTRASONIC ENS 1200-9600
Wiring colours:
A.C.conductor L1, L2, L3: black
Current-carrying Mp: light-blue
Protective earth conductor green-yellow
Alternating current control cable: red
Direct current control cable: blue/red
Controller cables: brown
Measuring leads: brown
Interference voltage: orange
Voltage details:
Connected load: 500 VA
Input to network: 230 V, 50 Hz, 1~, PE, N
Control voltage: 24/48 V
Lamp voltage: 230V
Terminal strip summary:
XAO: SUPPLY
X1: CABLES TO FIELD UNITS
X2: CABLE TO SLAVE
X3: CABLE TO HUMIDIFIER
X4: DOOR TERMINAL STRIP
X6: CABLE TO SENSORS

16

17

18

19
MUS 500
MASTER control box
ULTRASONIC BNB 1000-5000
Wiring colours:
A.C.conductor L1, L2, L3: black
Current-carrying Mp: light-blue
Protective earth conductor green-yellow
Alternating current control cable: red
Direct current control cable: blue/red
Controller cables: brown
Measuring leads: brown
Interference voltage: orange
Voltage details:
Connected load: 500 VA
Input to network: 230 V, 50 Hz, 1~, PE, N
Control voltage: 24/48 V
Lamp voltage: 230V
Terminal strip summary:
XAO: SUPPLY
X1: CABLES TO FIELD UNITS
X2: CABLE TO SLAVE
X3: CABLE TO HUMIDIFIER
X4: DOOR TERMINAL STRIP
X6: CABLE TO SENSORS

20