Varifan MST-5C User manual

MANUAL
MST-5C
Installation / User’s Guide
ATTENTION ELECTRICIAN
SEE WIRING DETAILS ON PAGES A-3 TO A-5 AND
ADDITIONAL INFORMATION IN SECTION B
USER’S GUIDE INSTALLATION GUIDE
INDEX / WARRANTY WIRING DIAGRAM
5-STAGE
THERMOSTAT
1234
®
Varifan
LO
HI
REL
REL
5 5
6
12
310
11
7
9
12
MST-5C
PRB
REC
REC
8
9
1011 12 1
8
9
10
8
5
TIMER
on
off
REL
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DIFF
DIFF
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73.3
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MST-5C WIRING DIAGRAM
Section A-2 MST-5C
WARNINGS AND PRECAUTIONS
Although the manufacturer has made every effort to ensure the accuracy of the
information contained herein, this document is subject to change without notice due to
ongoing product development.
WARNINGS AND PRECAUTIONS
Equipment, probe failure, blown fuses and/or tripped breakers may prove harmful to the
contents of the building. Therefore it is strongly recommended to install backup devices
and alarm or warning devices. Spare equipment should also be available at the owner’s
site. Equipment manufactured by the manufacturer is protected against normal line
surges. High surges caused by thunderstorms or power supply equipment may damage
this equipment. For added security against line voltage surges it is recommended that
surge and noise suppression devices be installed at the electrical distribution panel. Use
of shielded cable for probes is recommended for protection against lightning. These
devices are available from most electrical supply distributors.
RECOMMENDATIONS
The manufacturer recommends that all installation procedures described herein be
performed by a qualified electrician or installation technician. Furthermore the
manufacturer recommends testing all the functions and equipment connected to the
MST-5C, including the alarm system and backup devices, after installation, after
changes to the installation and every month after that.
Fuse verification and replacement, as well as the proper setting of control values shall
be the responsibility of the owner of this equipment.
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MST-5C WIRING DIAGRAM
MST-5C Section A-3
WIRING DIAGRAM
MST-5C
SECTION A
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MST-5C WIRING DIAGRAM
Section A-4 MST-5C
Wiring Diagram
INSIDE 1PROBE
INSIDE 2PROBE
INSIDE PROBE 3
INT 1
INT 2
INT 3
INT 4 / EXT
7
GNA
INSIDE 4 / OUTSIDE
MST-5C18/08/11 WIR
REV
0
Varifan
R
WIRING DIAGRAM
L1
L2
L1
L2
L1
L2
TEMP. PROBES
ALARM
LINE 115/230V
L1
L2/N
30V/1A
MAX
8
5 6
9
REL 1 REL 2 REL 3
SEE NOTES ON NEXT PAGE
L1
L2
REL 4
L1
L2
REL 5
WARNING!!!
SET LINE VOLTAGE
TO CORRECT VALUE BEFORE
ATTEMPTING TO OPERATE
THE COMPUTER.
LINE VOLTAGE
SELECTOR
230V
WHITE
RED
GREEN
BLACK
RELATIVE HUMIDITY
PROBE RH-3
RED CONNECTOR
8VAC
MGCB
GND
MODULES
ONLY WITH
MST-5C/H
WIRING DIAGRAM MST-5C
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MST-5C WIRING DIAGRAM
MST-5C Section A-5
MST-5C
Electrician’s notes
(PROBE WIRING) SHIELDED WIRE AWG #22 WITH 16/30 STRANDING,
500ft (150m) MAXIMUM LENGTH (Ex.: DECA 73-310).
For other probe, refer to specific probe manual for appropriate maximum length
and wire size or use AWG #22, 500ft (150m) MAXIMUM LENGTH.
(COMMUNICATION WIRING) SHIELDED LOW CAPACITANCE WIRE,
(Capacitance between conductors @ 1Khz = 24pF/ft), TWISTED PAIR (8
twist/ft), AWG #22, 820ft (250m) MAX LENGTH (Ex.: BELDEN 8761).
HIGH VOLTAGE WIRE INSTALLED ACCORDING TO LOCAL WIRING
CODE.
INSTALL LOW VOLTAGE WIRES (PROBES OR COMPUTER LINK WIRES)
AT LEAST 12in. (30cm) AWAY FROM HIGH VOLTAGE WIRES (120/230VAC,
24VDC). ALWAYS CROSS HIGH AND LOW VOLTAGE WIRES AT A 90-
DEGREE ANGLE.
RELAYS: 10A @ 240VAC RESISTIVE, MOTOR 1HP @ 240VAC, 1/2HP @
120VAC AT EACH OUTPUT.
MAXIMUM 2 WIRES OF SAME SIZE PER BLACK TERMINAL, NO BIGGER
THAN AWG #12, NO SMALLER THAN AWG #22.
1 WIRE ONLY PER GREEN TERMINAL. USE WIRE CONNECTOR IF YOU
WANT TO CONNECT MORE THAN 1 WIRE, NO BIGGER THAN AWG #12,
NO SMALLER THAN AWG #28.
CHECK INSTALLATION GUIDE FOR ALARM WIRING.
USE SHIELD FOR SHIELDING PURPOSE ONLY. CONNECT THE SHIELD TO
GROUND PLATE . NEVER LEAVE THE SHIELD UNCONNECTED AT BOTH
ENDS. NEVER CONNECT BOTH ENDS OF THE SHIELD TO GROUND
PLATE . THE USE OF A SHIELD FOR ALL PROBES IS MANDATORY.
1
6
8
9
5
2
3
4
7
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MST-5C INSTALLATION
Section B-6 MST-5C
INSTALLATION
MST-5C
SECTION B
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MST-5C INSTALLATION
MST-5C Section B-7
This section will inform the electrician on proper wiring and installation
procedures for the MST-5C.
The manufacturer recommends that the following installation instructions to be
followed as closely as possible, and that all work be performed by a certified
electrician. Failure to do so may void the warranty.
Unpacking
Unpack the MST-5C and inspect contents for damage. Should the contents
appear to be damaged, contact your local distributor to return the equipment.
The package should contain the following standard items:
1 MST-5C control (or MST-5C/H which includes a port for humidity probe)
4 Brackets / 4 screws
1 2004-10K temperature probe
1 Installation / User’s Guide
Mounting Hardware Required
This is the list of the mounting hardware needed, which is not included with the
product:
Shielded two-wire cable, AWG #22 (to extend probes).
Shielded two-wire twisted pair cable, AWG #22 (used for communication) see
electrician notes for capacitance selection.
4 screws (to hang the unit onto the wall).
Screwdrivers.
Soldering iron kit or approved sealed connectors.
Drill and hole saw kit
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MST-5C INSTALLATION
Section B-8 MST-5C
General installation guidelines
MST-5C Control
-It is recommended to install the unit in a hallway to limit the MST-5C exposure
to noxious gases.
-In order to avoid condensation problems inside the controller, it is
recommended to install the MST-5C on an inside wall. If it is not possible, use
spacers to have an air gap between the wall and the MST-5C.
-It is required to install the MST-5C side up with the cable entry holes facing
down.
-The enclosure is watertight, but do not spray water or immerse the MST-5C in
water. Cover it carefully with plastic when cleaning the room.
-The MST-5C should be installed in easy access location but away from
damaging elements (heat, cold, water, direct sunlight, …).
-Do not drill the face, the side, the top or the rear of the control.
-Do not install the MST-5C control near high voltage equipment, power supply
or transformer.
Electrical Cables
-All electrical cables must be installed according to local wiring codes.
-All cable shields must be connected to the MST-5C power ground only,
except for the cable connected to the optional PC interface. The shield is
needed to protect the MST-5C and the modules against any electromagnetic
interference generated by lightning or nearby operating machinery.
-Never use the shield as a conductor.
-Connect only one end of the shield to the ground of the MST-5C.
-Use separate conduit for the low voltage cables (communication and probes)
and the high voltage cables. There must be at least 1 foot (30 cm) between
low voltage and high voltage conduits.
-If a low-voltage cable has to cross over a high voltage cable, make this
crossing at 90°.
-All cable connections must be soldered or done with approved sealed
connectors.
-Probe cables must be 500’ (150m) or less.
-Communication cables must be 820’ (250m) or less.
-It is prohibited to use overhead cables outside the building.
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MST-5C INSTALLATION
MST-5C Section B-9
Electrical Power
-Protection from electrical surge should be included in the planning of each
installation.
-It is strongly recommended to have a backup power source to ensure life-
sustaining conditions in case of power failure (see figure 4).
-It is also strongly recommended to put a backup thermostat to sufficient fan
and heating system parallel to the MST-5C module output (see figure 5).
-The backup system and alarm must be thoroughly tested and verified as
working properly before using the ventilation system.
Mounting
-The enclosure must be mounted in a location that will allow the cover to be
completely opened right up against the wall.
-Fasten the four brackets to the four mounting holes on the back of the
enclosure, using the four screws provided with the brackets.
-Then mount the enclosure on the wall by inserting screws through the
brackets’ adjustment slots, into the wall. Make sure to position the enclosure
so that all wires extend out of the bottom section of the enclosure.
-The bracket slots also serve to adjust the position of the controller.
-Once you have adjusted the controller position, tighten the four mounting
screws.
FIGURE NO. 1 Mounting Position and Devices
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MST-5C INSTALLATION
Section B-10 MST-5C
Connection Procedure
Detailed Wiring Diagrams
Typical Sensor Wiring for Probes
The inside temperature sensor should be located in the area which gives the
most accurate temperature reading to achieve optimum ventilation. The sensor
should also be connected to the MST-5C with a shielded two-wire cable. It
should be located in an area protected from operating machinery, animal bites,
personnel or anything that could damage the sensor. See also “General
installation guidelines”.
The outside temperature sensor should be installed in a location which is not
influenced by heat generated from inside the building or direct sunlight. It should
also be protected from physical damage.
FIGURE NO. 2 Typical Temperature Probe Wiring
INT 3 INT 2 INT 1 GNA
SHIELD
PROBE
INT 4/EXT
FIGURE NO. 3 Typical Humidity Probe Wiring
LINE 115/230V
WHITE
RED
GREEN
BLAC K
RELATIVE HUMIDITY
PROBE RH-3
R ED C ONN ECTOR
8VAC
MGC B
GND
MODULES
ONLY WITH
MST-5C/H
SHIELD
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MST-5C INSTALLATION
MST-5C Section B-11
Typical Power Backup Wiring
A backup relay (DPDT) connects to the power source 1 in normal operation but
will switch to the power source 2 if source 1 is disabled. The backup relay should
be selected to ensure it is able to support the required power load.
FIGURE NO. 4 Typical Power Backup Wiring
8 PIN RELAY DPDT
(OMRON model MK2EP-UA-AC120)
3
4
5
6
2
1
8
7
NO 2
NO 1
NC 1
NC 2
COM 2
COM 1
L2 GND
L1
3
4
5
6
2
1
8
7
L2 L1 GND
source 1
DISTRIBUTION
PANEL
L2 L1
N
LINE
230 VAC
source 2
DISTRIBUTION
PANEL
LINE
230 VAC
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MST-5C INSTALLATION
Section B-12 MST-5C
Typical Thermostat Backup Wiring
If the MST-5C fails, the backup thermostats will activate the dedicated fan or
heater as soon as temperature reaches the set point of the thermostat. The
thermostat must be accessible for adjustment and must be set at 3 to 5 degrees
above the fan’s relative set point or 3 to 5 degrees under the heater relative set
point.
FIGURE NO. 5 Typical Thermostat Backup Wiring on Relay
L2
L1
RELAY
T15WD
12P
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MST-5C INSTALLATION
MST-5C Section B-13
Typical Alarm Connection Wiring
The MST-5C provides a normally closed dry contact to set off an alarm in case of
a low or high temperature condition occurs. Moreover, this same contact can be
used to signal a power failure or other malfunctions. It may be connected to an
alarm system or directly to a siren and /or auto-dialer.
Make the normally closed (NC) connections as indicated in figure 6.
The relay will activate 6-8 seconds after an alarm is triggered.
FIGURE NO. 6 Typical Alarm Connection Wiring
ALARM SYSTEM /
AUTO DIALER
8VAC
MGCB
GND
MODULES ALARM
30V /1A
MAX
X1336
MST-5C
INT 1 IN T 2 INT 3
INT 4 / EXT
GNA
TEMP. PROBES
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MST-5C INSTALLATION
Section B-14 MST-5C
Powering Up Procedure
Once the MST-5C is properly mounted on the wall and all modules and sensors
connected to the terminal block, perform the following step:
Verify all Connections
Seal all cable entry holes.
Hermetically Close the MST-5C
Close the front panel.
Put the power on
Secure the front panel with a lock
Downloading the Configuration
When upgrading your system with a new configuration, you will have to download
the configuration.
There are two ways to download a configuration in the MST-5C controller.
1) Downloading by powering down.
A. Ensure the power source of the MST-5C is OFF (flip the circuit breaker on
the distribution panel).
B. Remove the faceplate screws and lift up the cover.
C. Insert the configuration chip (MMX) into the socket of the main board.
D. Switch on the power source. The display on the front panel should indicate
dNLD for approximately 15 seconds. If dNLD is not displayed, try one
more time. If dNLD is still not displayed, remove and replace the
configuration chip (MMX).
E. When the downloading procedure is complete, remove the configuration
chip (MMX) and place it in the bottom part of the enclosure or in another
safe location. Once the MMX Chip is removed, the MST-5C starts up and
executes the configuration.
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MST-5C INSTALLATION
MST-5C Section B-15
2) Downloading while the MST-5C is powered up.
A. Remove the faceplate screws and lift up the cover.
B. Place the MMX chip into the socket of the main board. At this moment, the
MMX Detected parameter will appear.
C. Adjust the MMX Detected parameter to dNLD and press the SET/CLR
button. The display on the front panel should indicate dNLD for
approximately 15 seconds. If dNLD is not displayed, try one more time. If
dNLD is still not displayed, remove and replace the configuration chip
(MMX).
D. When the downloading procedure is complete, remove the configuration
chip (MMX) and place it in the bottom part of the enclosure or in another
safe location. Once the MMX Chip is removed, the MST-5C starts up and
executes the configuration.
WARNING: During this procedure, some components are live and can
be dangerous if touched.
Uploading the Configuration
It is possible to upload a configuration into a configuration chip (MMX) in order to
save parameters and setup or to backup the configuration.
Here’s the procedure to upload a configuration.
A. Make sure that the MST-5C is powered up.
B. Remove the faceplate screws and lift up the cover.
C. Place the MMX chip into the socket of the main board. At this moment, the
MMX Detected parameter will appear.
D. Adjust the MMX Detected parameter to upLD and press the SET/CLR
button. The display on the front panel should indicate upLD for
approximately 15 seconds. If upLD is not displayed, try one more time. If
upLD is still not displayed, remove and replace the configuration chip
(MMX).
E. When the uploading procedure is complete, remove the configuration chip
(MMX) and place it in the bottom part of the enclosure or in another safe
location. Once the MMX Chip is removed, the MST-5C will continue to
execute the configuration.
WARNING: During this procedure, some components are live and can
be dangerous if touched.
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MST-5C INSTALLATION
Section B-16 MST-5C
MST-5CCompatible Probes
This is the list of all compatible probes that can be connected with MST-5C
control with a short description of their function.
Temperature probe 2004-10K (black cap)
Temperature probe with a temperature range of -58 to 140°F (-50 to 60°C).
Relative humidity probe RH-3
Relative humidity probe with a measuring range of 0 to 100 RH% (red
connector).
MST-5C Compatible Modules
This is the list of all compatible modules that can be connected with MST-5C
control with a short description of their function.
Computer interface
NET-IN2 Communication Module (Module inserted into the controller to
communicate with the computer interface)
RF-IN Communication Module (Module inserted into the controller for a
wireless communication with the computer interface)
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MST-5C INSTALLATION
MST-5C Section B-17
Specifications
Storage temperature -4°F to 131°F (-20°C to 55°C)
Operating temperature 32°F to 113°F (0°C to 45°C)
Humidity 90% maximum Non-condensing
Weight 2,4 lb (1,1 kg)
Size 9” x 7” x 4 3/4” (22.8 cm x 17.7 cm x 11.5 cm)
Protection index IP 66
Warranty 2 years
POWER SUPPLY
Operational voltage range (SW3 @ 115V) 92 to 125VAC
Operational voltage range (SW3 @ 230V) 184 to 250VAC
Operational frequency range 45 to 65 Hz
Power supply circuit consumption (CPU
Board) 20 W maximum
SOURCE 8VAC
Voltage Range 6.5 to 13VAC
Maximum current allowed 50mA
PROBE INPUTS
Temperature probe 2004-10K
Maximum wire length 500 feet (150 m)
Recommended wires 2 conductors, stranded, shielded, AWG #22
ALARM RELAY
Maximum current 1 A at 30VDC
Delay before activation Between 6 and 8 seconds
OUTPUT RELAYS
Maximum Current 1HP @ 240VAC, 1/2HP @ 120VAC,
10A@240VAC
Caution Notice These relays are rated by UL and CSA at 1HP
@ 240VAC, 1/2HP @ 120VAC. However, for
outputs requiring frequent activation (ex:
minimum ventilation fans working on a timer) it
is recommended not to use more than 1/2HP @
240VAC, 1/4HP @ 120VAC per relay.
COMMUNICATIONS PORT (MGCB)
Maximum wire length (2400 bps) 820 feet (250 m)
Maximum wire length (19200 bps) 6.5 feet (2 m)
Recommended wire 2 strands, twisted pair, low capacity, shielded,
AWG #22
Important Notice:
-It is important to have a backup system in case of a system failure.
-Low-voltage and high-voltage wire must be passed through different
conducts at least 1 foot (30 cm) apart. If low-voltage and high-voltage
conduits must be crossed, the crossing must be at a 90-degree angle.
- All wiring must be made by a certified electrician and conform to local
electrical regulations.
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MST-5C INSTALLATION
Section B-18 MST-5C
Troubleshooting
SYMPTOM CAUSE REMEDY
Temperature probe
reads LO Temperature is below -58°F (-50°C).
Probe is disconnected or
defective.
Check all connections. If
the problem persists, and
the temperature is within
normal range, replace the
probe.
Temperature probe
reads HI Temperature is above 140°F (60°C).
Probe is short circuited or
defective.
Check all connections. If
the problem persists, and
the temperature is within
normal range, replace the
probe.
Displays are blank MST-5C is not powered.
Flat cable between the
main and top boards of the
MST-5Cis disconnected.
Make sure the control is
powered.
Make sure the flat cable is
connected.
Make sure the fuse is
correct.
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MST-5C USER’S GUIDE
MST-5C Section C-19
USER’S GUIDE
MST-5C
SECTION C
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MST-5C USER’S GUIDE
Section C-20 MST-5C
5-STAGE
THERMOSTAT
1234
®
Varifan
LO
HI
REL
REL
5 5
6
12
310
11
7
9
12
MST-5C
PRB
REC
REC
8
9
1011 12 1
8
9
10
8
5
TIMER
on
off
REL
REL
DIFF
DIFF
5
S
T
A
G
E
4
4
H
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A
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2
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73.3
Control Description
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