SAMSON Refrigerant Leak Monitor Kit 6CH User Guide

SAMSON Refrigerant Leak Monitor Kit 6CH

FEATURES

The refrigerant Leak Monitor Kit 6CH offer an ideal solution for multipoint surveillance of machinery room and walk-in freezer rooms where refrigerant gases may be present. The kit is supplied with

• 1 x Monitoring Unit MPU6C
• 4 x Detector New MP-DS-HFC-4000 (product number: 708042)
• 1 x Red combined flash / siren FL-RL-R
• 2 x 100m halogen free cable 3×0.75mm2

Fig. 1
Functional diagram

• The monitoring unit MPU6C can be connected to up to 6 detectors. It can display operating status and alarm information independently for each channel via LEDs. They are suitable for monitoring all HFC and HFO refrigerants.
• The 4 x New MP-DS-HFC-4000 detectors are equipped with the new SEN027 Self Sense sensor. Additional 2 detectors can be purchased separately to fully utilize all channels in MPU6C if required. Once connected, they will continuously measure the gas concentration and provides an analogue signal to the central unit.

Other features include:

• User configurable Alarm time delays.
• Manual/auto alarm reset for each channel
• Built-in service function and self-test program
• Four alarm relays with 230 volts rated SPDT contacts
• Failsafe relay operation on power loss
• Audible alarm

Please Note!
MPU6 is normally supplied with default set alarm thresholds. These must be verified or reset during commissioning. Alarm levels must always be set on each channel for proper gas and detector type!

Default settings from factory:

• Factory gas specific pre-calibration can be delivered upon request. Must be specified when ordering.

Alarm levels, factory settings are:

WIRING DIAGRAMS

FUNCTION

Channel settings
After connecting each detector and applying power, the green LED on each channel will flash as the pre-heat process commences. After approximately 4 minutes the green LED will be illuminated permanently, and the sensor is fully operational. Each channel has one yellow and two red warning LEDs. The yellow LED indicates a low-level gas leak (above alarm threshold C) whilst the two red LEDs indicate gas concentrations above thresholds B and A.

When gas is detected above the respective alarm threshold the appropriate LED’s will flash until the appropriate time delay has expired when it is permanently illuminated, and the corresponding relay contacts change state. As the gas concentration subsides the LEDs and relays will return to their normal state unless the ‘manual reset’ function has been selected. The audible alarm will be initiated if it is configured with the respective alarm threshold and cannot be muted. Technicians can however inhibit the alarm by selecting ‘Service Mode’.

Central unit details

AUTO/MANUAL ALARM RESET

DIP switch (5) no3 on each channel’s control card manages the alarm reset function. “ON” enables Auto reset and “OFF” enables Manual reset, via depressing “Reset/Test/Service”-button (7).

ALARM TIME DELAY (T1)

DIP-switch (5) controls the alarm time delay for each channel.

no1  no2

• on on No alarm delay
• off on 1 minute delay
• on off 10 minutes delay
• off off 30 minutes delay

TEST MODE
By depressing the “Reset/Test/Service”-button (7) on any channel for 5 seconds the test program is initiated. This sequentially energizes each LED and relay at five second intervals. That the test program has started is indicated by the fact that all LEDs on chosen channel will go out.

SERVICE MODE
Depressing the” Reset/Test/Service” button (7) for 10 seconds will inhibit all alarm functions for the chosen channel for a period of 60 minutes. Service mode is indicated by the fact that all LEDs on the chosen channel are flashing. Whilst in this mode a new 60 minute inhibit period can be initiated by repeating the process. Normal operation will be automatically resumed after 60 minutes or can be cancelled by depressing the “Reset/Test/ Service”-button briefly.

FAULT MODE
In the event of a detector failure (GV offset < 0,1V) or disconnection of the interconnecting wiring a fault condition will be indicated by loss of the green ‘Active’ LED, the other LEDs start to flash and the alarm relay D is de- energized. In the event of power failure all relays (A, B, C & D) will be de- energized. Connections are available for an optional battery back-up to enable total continuity of operation in the event of a power failure. A 4-hour delay can be configured for relay D to prevent nuisance alarms. This is activated by setting DIP switch (5) no4 on the respective channel card to ‘ON’. The operation of the LEDs will remain unchanged.

INTERNAL BUZZER AND 24VDC AUXILIARY OUTPUT

The internal buzzer (1) and 24VDC output can be activated by the DIP-switch (4) on the terminal board and can be user configured to operate from alarm concentration A(no1), B(no2) or C(no3). Setting the DIP-switch to ON for the respective alarm level, selects the appropriate alarm level. The 24VDC auxiliary alarm output is always activated together with the buzzer. However, by removing jumper Bb (3) the buzzer can be disabled.

Please Note!
After being powered off for prolonged periods the sensor may take several minutes to stabilize during which time ‘false’ alarms may be initiated. Such ‘false’ alarm shall disappear within a few minutes.

REMOTE DETECTORS

Sensor connection

The “MP” is a range of detectors special designed for use with the MPU units.
Detectors are available for different gases, with different measuring ranges and in different housings to suit the actual application and environmental requirements. Examples of gases that are possible to detect are: HFC, HCFC and mixtures. Other detectors can be connected to MPU unit. Contact us for further details.

Please Note!
The sensors used in the MP-series have limited selectivity and are therefore not gas specific. Care should be taken when installing the equipment to minimize any cross contamination from other gases or vapours.
The cable length between sensor and central unit (MPU) is max 50m.
For further guidance on specific applications contact us.

LOCATION/INSTALLATION

Fig. 8
Diagnostic tool DT300 equipped with SM300-SELF SENSE sensor.

| Alarm levels
---|---
C| B| A
Gas concentration
Refrigeration gas:| Sensor type| Nominal GV-offset

[V]

| [V] [ppm]| [V] [ppm]| [V] [ppm]
R134a| SEN 027| 0,4 V| 1,5| 100| 2,8| 1000| 3,2| 2000
R404a / R507C| SEN 027| 0,4 V| 1,5| 100| 3,3| 1000| 3,9| 2000
R407f| SEN 027| 0,4 V| 1,5| 100| 3,7| 1000| 4,2| 2000
R407C| SEN 027| 0,4 V| 1,7| 100| 3,1| 1000| 3,4| 2000
R448A / R449A| SEN 027| 0,4 V| 1,7| 100| 3,7| 1000| 4,2| 2000
R513A| SEN 027| 0,4V| 1,3| 100| 3,3| 1000| 3,8| 2000
R417a| SEN 027| 0,4 V| 1,7| 100| 3,1| 1000| 3,4| 2000
R410A| SEN 027| 0,4 V| 1,5| 100| 3,5| 1000| 3,9| 2000
R22| SEN 027| 0,4 V| 1,0| 100| 3,1| 1000| 3,8| 2000

FUNCTION CONTROL

Please Note!
Testing the system is recommended to be done once a year. A basic function test can be made using a Service tool.

TROUBLESHOOTING

When we are troubleshooting, we recommend checking these following steps:

• Reset alarm on the test / reset-button if possible.
• Check sensor value and calibrate if necessary / possible.
• Check for possible leak.
• Age of sensor
• Last calibration date of sensor
• Possible contaminations from oil, cleaning aids, silicone, hydrogen, glue, paint

Below is an LED indication guide explaining the different indication options.

alarm level is activated.
| Bottom three LEDs are lit = B-alarm Green + Yellow + Red| Middle alarm is activated

-Go by the checklist.

| Bottom two LEDs are lit = C-alarm Green + Yellow| Lowest alarm level is activated

-Go by the checklist.

| Top three LEDs flashing = Fault alarm| Possible sensor fault Check sensor connections

Change the sensor if calibration isn’t possible.

| Only one red LED are lit = Fault alarm longer than 4h.| See instructions for” Fault alarm”
| All four LEDs are flashing = Service Mode

All three relays are frozen for 60min, and no alarms will be triggered.

| Alarm blockage activated for 1h. Relays will not change position when alarm levels are triggered.

Normal mode can be activated by pressing the reset/test button once.

CLAIM/WARRANTY PROCEDURE

Before contacting SAMON for a claim, be sure to have read this guideline and most importantly tested the sensor in the correct way. As our experience is that 99% of all claims in the end is sensor related. A poisoned sensor is not granted by warranty.

SAMON offers 5 years of warranty on our products (excluding the sensor head).

If you have a problem with the product (that is not caused by the sensor) you must contact SAMON and we will activate an RMA (Return Merchandise Authorization).
When activating an RMA, SAMON will send out an RMA form that must be filled in in full and be sent together with the product.

Please Note!
Products that are sent to SAMON without being registered as an RMA will not be handled as an RMA. SAMON earns the right to refuse products that are sent without an RMA registration.
A product that is sent to SAMON’s workshop for claim, registered as an RMA will be checked and tested as soon as possible as SAMON’s intensions are to minimize the standstill as much as possible for the end user.

Contact info for RMA:
RMA@samon.se

APPENDIX 1

Gas R404a / R507a
Range 0 – 4000 ppm

Gas R407f
Range 0 – 4000 ppm

Gas R407C
Range 0 – 4000 ppm

Gas R448a / R449a
Range 0 – 4000 ppm

Gas R513a
Range 0 – 4000 ppm

Gas R417a
Range 0 – 4000 ppm

Gas R410a
Range 0 – 4000 ppm

Gas R22
Range 0 – 4000 pp

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