Bacharach HGM300 Technical Maintenance Manual

Manual is about: Refrigerant Gas Monitoring System

Summary of HGM300

  • Page 1

    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 s...

  • Page 2

    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 bu...

  • Page 3

    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 (gre...

  • Page 4

    Section 2 hgm300/rdm800 refrigerant gas leak monitor mechanical room placement sample inlet pickup points chiller rdm800 remote display module outside hallway machine room exhaust fan aux. Horn/strobe remote alarm sample inlet pickup point hgm300 halogen gas monitor rev 3/2/09 4.

  • Page 5

    Section 3 hgm300 relay connector relay #1 common no nc relay #2 common no nc relay #3 common no nc relay #4 common no nc alarm alarm alarm 1 2 3 fault aux. Power main power line neutral strobe horn line neutral jumper the ‘neutral’ of the auxiliary power connector to the ‘common’ on the relay block....

  • Page 6

    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 the...

  • Page 7

    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 z...

  • Page 8

    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)...

  • Page 9

    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 ent...

  • Page 10

    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 m...

  • Page 11

    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 ...

  • Page 12

    Section 7 red blinking led indicates communication functioning 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) hgm300 voltage check z1 voltage +5vdc 2 red leds power supply indicators to...

  • Page 13

    How to: silence alarms on the hgm300 section 8 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 ...

  • Page 14

    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 th...

  • Page 15

    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 add...

  • Page 16

    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 ...

  • Page 17

    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 ma...

  • Page 18

    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...

  • Page 19

    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 p...

  • Page 20

    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...

  • Page 21: Whom to Call At The Factory

    Section 12 whom to call at the factory for refrigerant gas leak monitor assistance contact: peter pape phone number: 770-486-8219 fax number: 770-486-8222 e-mail: peterp@mybacharach.Com bacharach, inc.,help@mybacharach.Com shipping address: bacharach, inc. 621 hunt valley circle new kensington, pa 1...