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HGM300/RDM800 PREVENTATIVE MAINTENANCE AND TECHNICAL SUPPORT
SECTION 1 – HGM300 CPU reset, RDM800 CPU reset, WARM UP notes and HGM300 Self
Test
SECTION 2 - HGM300/RDM800 Mechanical Room layout
SECTION 3 – HGM300 Relay Connector
SECTION 4 – Flow check procedure
SECTION 5 – Clipping fault adjustment
SECTION 6 – Dual loop 4-20 mA dc scrolling output
SECTION 7 – HGM300 voltage check Dual loop 4-20 mA dc scrolling output
SECTION 8 – Alarm silencing
SECTION 9 - N
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SECTION 1 HGM300 / RDM800 TECHNICAL SUPPORT NOTES HGM300 CPU RESET Locate the white button marked “CPU reset” on the main HGM300 board (about the center of the main board). Locate the second reset button to the left of the CPU reset button. Hold the left button in, press and release the CPU reset button. There will be 5 beeps (beep/beep – beep/beep – beep). Release the left button. The monitor will now be reset A second way to reset the HGM300 CPU is to turn off power, press and h
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valve check starts at zone 16 and works down to the purge solenoid. A four zone monitor there is a ten seconds of silence before the valves start to click. All lights on the HGM300 go out. The Yellow light on the RDM800 will come on after a few moments (Time out error). Each light in succession (Green, Yellow and Red) will come on. The monitor will toggle each relay (Leak, Spill, Evacuate and Fault) in succession. A signal in both channels of the dual 4-20 mA loop will simul
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SECTION 2 HGM300/RDM800 Refrigerant Gas leak monitor mechanical room placement Aux. Horn/Strobe Remote Alarm Exhaust Fan Outside Hallway Sample Inlet Pickup Point RDM800 Remote Display Machine Room Module HGM300 Chiller Halogen Gas Monitor Sample Inlet Pickup Points Rev 3/2/09 4
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SECTION 3 HGM300 Relay Connector Alarm Alarm Alarm 1 2 3 Fault Relay Relay Relay Relay #1 #2 #3 #4 Horn Strobe Aux. Power Main Power Jumper the ‘Neutral’ of the auxiliary power connector to the ‘Common’ on the relay block. Connect one end of strobe or horn to the ‘NO’ of whichever level of alarm is appropriate for application. The other end of strobe or horn is connected to a 120VAC power sour
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SECTION 4 NO FLOW CHECK PROCEDURE NO FLOW ZONE Check for air sample tube blockage. NO FLOW PURGE Check for blockage of purge line. Verify that the purge line does not exceed 100’ in length. NO FLOW ZONE AND NO FLOW PURGE Check the water trap. If full of water, drain and re-secure the petcock. If there is no water in the trap, check for a blockage in the exhaust line. Verify that the exhaust line does not exceed 100’ in length. NOTE_ Go to the diagnostic screen and view the “PRESS”
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ADDITIONAL NOTES ON “NO FLOW” PROBLEMS (THE FLOW RATE OF THE PUMP IS 2L/MIN) A DIFFERENCE OF LESS THEN 0.1 PSIA BETWEEN AMBIENT AND PRESSURE WILL CAUSE A “N0 FLOW” FAULT. A VACUUM OF 0.7 PSIA OR LESS BELOW PRESSURE WILL CAUSE A “N0 FLOW” FAULT. TO OBSERVE PRESSURE READINGS ON THE DIAGNOSTIC SCREEN ZONE BY ZONE, YOU MUST PUT A ZONE INTO”ZONE HOLD” THEN GO TO THE DIAGNOSTIC SCREEN AND VERFY THAT YOU ARE OBSERVING THE PROPER ZONE AT THE TOP OF THE SCREEN. IN LINE FILTER “T” CO
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NO FLOW PROBLEMS 1) – Pinch off the tubing between the water trap and internal filter. Go to the diagnostic screen on the RDM800. Observe the “PRES”, “VAC” AND “AMB” readings at the bottom of the screen. b) – If the pressure does not drop to normal vacuum levels (about 2 PSIA below pressure reading) the problem is in one of the following; 5) – Tubing from the filter to the bench. 6) - Tubing, “T” connector to pressure sensor. 7) – Tubing from “T” connector to I/R bench. 8) – Tubing fr
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HOW TO FORCE TAKING NEW PRESSURE READINGS FROM THE SYSTEM SCREEN SELECT THE HGM300 THAT NEEDS A NEW PRESSURE READING AND PRESS THE BUTTON TO THE LEFT OF THAT HGM300. THIS WILL TAKE YOU TO THE HGM SETUP SCREEN. ON THE BOTTOM RIGHT SIDE OF THIS SCREEN PRESS THE BUTTON TO THE RIGHT OF “SERVICE MODE ENTRY” TWO TIMES WITHIN THREE SECONDS. THE HGM300 RED ALARM LIGHT WILL NOW BE FLASHING. PRESS THE BUTTON TO THE RIGHT (THE SCREEN NOW SHOWS “IN SERVICE QUIT” FLASHING) TWO TIMES WITHIN THREE S
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SECTION 5 Clipping Fault Adjustment Locate R-34 Gain adjust potentiometer. Adjust DETECTOR voltage using the Diagnostic screen until the voltage is 4.24 volts. If the reference voltage is properly set, the clipping fault will go away after the unit samples the next zone. Note - It may take several minutes for a voltage change to appear on the diagnostic screen due to the cycle time of the monitor from zone to zone. If the clipping fault remains, the reference voltage must be verifie
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HGM300 Refrigerant Gas Leak Monitor Dual Loop 4 to 20 mAdc Scrolling Output Converting 4 to 20 mAdc to 1 to 5 V dc Output Loop #1 indicates the sample zone number; i.e. 5 mAdc = Zone #1 … 20 mAdc = Zone #16. The output of Loop #1 will be fixed by the number of sampling zone solenoid blocks attached to the main board. The exception to this rule is that sampling zones will be skipped if the sample tube length is set to “0” feet in the zone set up menu. This also affects the 4 to 20 mAdc
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Z3 – 15 VDC SECTION 7 2 RED LEDS POWER SUPPLY INDICATORS Z2 + 15 VDC TOP +15 VDC SECOND -15VDC HGM300 Voltage Check Z1 Voltage +5VDC Connector J9 Pin (-) 1 to Pin 10 (+) +5 volts DC (Communication voltage) Pin (-) 1 to Pin 8 (+) -15 volts DC Pin (-) 1 to Pin 9 (+) +15 volts DC (Bench voltages) 1 RED LED POWER SUPPLY INDICATOR +5vdc 1 ORANGE LED POWER SUPPLY INDICATOR LOCATED AFTER 1 AMP FUSES JUMPER FROM POWER SUPPLY WIRE 1 AND 2 ARE 5 V DC TO WIRE 4 OR
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SECTION 8 HOW TO: SILENCE ALARMS on the HGM300 THERE ARE 4 STEPS: STEP #1: Start at this screen, the “SYSTEM SCREEN”. STEP #2: PRESS THIS BUTTON, which will take you to the “ALARM SUMMARY SCREEN”. STEP #3: Each alarm must be acknowledged separately. To do that PRESS THIS BUTTON and go to the “ALARM DETAIL SCREEN”. STEP #4: PRESS THIS BUTTON TO ACKNOWLEDGE THIS ALARM. ANY OTHER ALARMS WILL HAVE TO BE DEALT WITH IN THIS WAY TO SHUT OF
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HGM300 Refrigerant Gas Leak Monitor NDIR Bench Measurement Description Pyroelectric Detector Sample Flow NDIR Source Dual Optical Bandwidth Filters Gas passing through the bench absorbs some I-R energy. Each of the 24 gasses in the onboard library has a very specific absorption signature defining the amount of energy any of these gasses will absorb in relation to the concentration present at the
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5.) Auto zeroing or purging has other benefits. We discussed how it’s used to provide a zero base for comparison to the sample measurement. This, also, allows us to monitor and compensate for changes in I-R drive circuitry, source, bench, detector, and other electronic components. Again this all adds to long-term reliability and accuracy. 6.) Our narrow band filters limit the I-R range from 8.1 to 9.4 uM. These optical devices cannot fluctuate in any way. They eliminate interference fro
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SECTION 10A M1110AX-A Testing HGM300 Monitors Using Gas Verification Kits SCOPE This procedure describes the steps necessary to use the gas verification kits, to verify operation of an HGM300. MATERIALS USED • Reference Gas • Variable Flow regulator • HGM 300 Refrigerant Monitor • RDM 800 PROCEDURE 1. If HGM300 and RDM800 are connected, operating, and communicating skip to step 3. Verify on initial power up HGM300 and RDM 800 communicates. To verify this look in the upper
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8. Verify that the unit is not in a purge cycle. This can be done by verifying a flow of air into zone 1. Read the (PRES) reading in the diagnostic screen (write down reading). 9. Connect the tubing from Reference Gas regulator to Zone 1 on the manifold of HGM 300. Note: The Fault light on HGM300 may illuminate until gas starts to flow from the reference bottle to unit. The pressure should be below the original reading (if reading does not drop the unit may be in the purge cycle. If so wa
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SECTION 10B M1110AY-A Testing HGM300 Monitors Using Gas Verification Kit and PC Software SCOPE This Procedure describes the use of gas verification kits with the HGM300 PC software. MATERIALS USED • Reference Gas • Variable Flow Regulator • HGM300 Refrigerant Monitor • HGM300 PC Software PROCEDURE 1. Power up HGM300, the green led on the monitor will blink until the warm-up cycle is complete. Connect the variable regulator to the reference bottle and connect the tubing to t
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9. Connect the tubing from the reference Gas regulator to Zone 1on the manifold of HGM300. NOTE: Fault light on HGM300 may illuminate until gas starts to flow from the reference bottle. Press the enter key from keyboard the sensor readings will update indicated by a beep sound from the HGM300. The pressure should be below the original readings, if not the unit is in a Purge cycle wait until purge cycle is complete then continue. Adjust the variable regulator clockwise to set the pressure t
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SECTION 11 TO ENTER A SYSTEM PASSWORD PROTECTED OR CHANGE A PASSWORD 1) The system must be up and communicating. 2) Press the button to the left of “HGM# 1”. 3) When the “PASSWORD” screen appears enter “313” as the password. 4) From the System Screen, go to the RDM SET UP Screen. 5) In the “PASSWORD” block, enter “000” or a new password. “000” will remove password protection completely. R
