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27

Part No. 6-847684-00 Rev. D01

Front Panel Installation

Finish Installation

1. Remove front panel assembly from

anti-static shipping bag.

2. Remove two front panel hinge

mounting screws and lanyard mounting

screw from alarm panel back box

assembly (Figure 13). 

3. Attach front panel hinge and lanyard to

alarm panel back box using screws

removed in step 2 as shown in Figure

14.  Large (8-module) back boxes use

two lanyards, one on each side.

Figure 13:  Front Panel Hinge and Lanyard Screws

Figure 14:  Attach Front Panel and Lanyard

Line Voltage Electrical Connection

1. Remove four nuts from plastic power

supply shield.

2. Remove plastic shield from power

supply.  The plastic shield contains an

in-line fuse holder that is wired to a

two-pin plug on left side of power

supply assembly.  Remove two-pin

plug from power supply.

3. The incoming line voltage hot and

neutral wires should be connected via

wire nuts to black (hot) and white

(neutral) wires of power supply two-pin

harness.  Connect incoming ground

wire to alarm box green ground wire.

Refer to Figure 12.

4. Carefully position wires in bottom left

corner of alarm panel box.  Reconnect

two-pin harness to power supply male

connector.  Harness connector is

keyed to prevent incorrect orientation,

however, use care to ensure correct

pin alignment.

5. Reinstall plastic power supply shield

while making sure all high voltage

wires are contained within plastic

shield.

6. Secure plastic shield with four nuts.

Figure 12:  Line Voltage Connection

Hinge screws

Lanyard screw

Power Supply

Fuse Holder

Neutral (white)

Line (black)

Ground (green)

Summary of Contents for MEGA 2

Page 1: ...Part No 6 847684 00 Rev D01 Pg 1 MEGA 2 Medical Electronic Gas Alarm Installation Operation and Maintenance Instructions MAN 01 027...

Page 2: ...Panel 11 Determining Number Of Conductors 12 Wiring Schematics 13 Alarm Wiring Examples 13 Finish Installation Line Voltage Electrical Connection 27 Front Panel Installation 27 Sensor Installation Re...

Page 3: ...odule 35 Multi Signal Module 38 Monitoring Mode Digital Display Module 40 Multi Signal Module 41 Testing Digital Display Module 41 Multi Signal Module 42 Power Supply Module 43 Troubleshooting Guide 4...

Page 4: ...and low alarm thresholds Adjustable audible alarm mute duration Individual high and low alarm dry contact relay outputs Can transmit pressure or vacuum signal to another digital display module for rem...

Page 5: ...module WILL NOT deactivate relay The General Fault Relay will deactivate only after alarm condition is corrected and alarm panel resumes normal status Relay contact ratings are 2 A 30 VDC 0 5 A 125 V...

Page 6: ...sors Slave Applications Designates type of alarm panel component from chart below O OXYGEN D OXYGEN 100 PSI X NITROUS OXIDE A MEDICAL AIR F MEDICAL AIR 100 PSI 5 AIR ISO 7 LABORATORY AIR 2 O2 CO2 4 O2...

Page 7: ...t panel wrapped in anti static shipping bag 2 If alarm panel is configured with remote sensors remove sensor rough in and mounting box from small individual boxes shipped within main alarm panel shipp...

Page 8: ...date alarm panel back box Alarm panel back box must have rigid vertical members for support on both left and right sides Power to alarm panel shall enter through lower left or top left conduit hole in...

Page 9: ...blies 2 Perform standing pressure tests and cross connection tests as required by NFPA and CSA Loosen screws to adjust back box depth same each side Four holes in back of box are provided for surface...

Page 10: ...ressure Switch Pipeline Connection DISS Kit P N Gas Service 6 120004 10 Oxygen 6 120004 11 Nitrous Oxide 6 120004 12 Medical Air 6 120004 13 Vacuum 6 120004 14 Nitrogen 6 120004 18 Instrument Air 6 12...

Page 11: ...ting Holes for entrance of low voltage field wiring All low voltage MEGA2 wiring must meet the following criteria Copper wire no smaller than 22 AWG Circuit length not to exceed 5000 feet Cable must b...

Page 12: ...for each alarm panel for each signal That is for any given signal two wires will route to first alarm panel and another two wires will route to second panel Both pairs of wires will originate from sw...

Page 13: ...e High Low Relays 8 Remote Pressure Vacuum Switches 9 Johnson Controls METASYS Wiring examples of master area alarms for the following systems are provided 1 Two master alarm panels with digital displ...

Page 14: ...Annunciator Module 20 wire ribbon cable to adjacent module 20 wire ribbon cable to adjacent module Power Supply Fuse Holder Ground green Line black Neutral white 3 wire power supply harness 120V AC M...

Page 15: ...arized connector 2 pin polarized connector ribbon to adjacent module LOCAL SENSOR REMOTE SENSOR ribbon to adjacent module Sensor pigtail Sensor pigtail provided Wire nuts Field wiring by others NOTE S...

Page 16: ...gnal Module at FIRST master alarm panel Multi Signal Module at SECOND master alarm panel SIGNAL 1 pin 1 pin 2 COM SIGNAL 2 pin 3 pin 4 COM SIGNAL 3 pin 5 pin 6 COM SIGNAL 4 pin 7 pin 8 COM SIGNAL 5 pi...

Page 17: ...ibbon to adjacent module ribbon to adjacent module NOTE The above master to slave wiring configuration DOES NOT comply with NFPA 99 wiring guidelines for two required master panels In order to comply...

Page 18: ...SIGNAL 2 pins 3 4 SIGNAL 3 pins 5 6 SIGNAL 4 pins 7 8 SIGNAL 5 pins 9 10 Dry normally closed output relay contacts NOTE Output relay contacts are dry normally closed type Contacts open upon designated...

Page 19: ...te relay until audible alarm is again reactivated Relay contact ratings are 2A 30 VDC 0 5 A 125 VAC ribbon to adjacent module Low Alarm Relay N C pin 8 Common pin 7 N C pin 10 Common pin 9 High Alarm...

Page 20: ...acuum applied Low switch is preset at 12 inHg green ground low low high yellow brown orange purple red blue N C N C N O N O C C NOTE Switch contacts shown with 175 PSI pressure applied Low switch is p...

Page 21: ...trols METASYS Johnson Controls METASYS or compatible building automation system Metasys Integrator Serial Serial Annunciator Module of each alarm panel connected to the network shown above Serial pin...

Page 22: ...Digital Display Module Multi Signal Module Multi Signal Module pin 1 pin 2 com pin 1 pin 5 pin 6 pin 5 pin 6 pin 2 com Connected to main oxygen pipeline Connected to main oxygen pipeline Normally clos...

Page 23: ...e Digital Display Module Multi Signal Module Multi Signal Module pin 6 com pin 5 pin 6 pin 1 Connected to main oxygen pipeline Secondary Supply from liquid O2 manifold Com Com Com pin 6 com pin 1 Rese...

Page 24: ...isplays liquid bulk liquid reserve oxygen shown NOTE Switch contacts must be dry normally closed type Alarm activates when contacts open MAIN LINE O2 Reserve In Use O2 Main Tank Liquid Low O2 Reserve...

Page 25: ...oint High Med Air Lag Compressor Air Comp High Temp Low Line Vacuum Lag Vacuum Pump Vacuum Pump High Temp LOW HIGH com com n c not used n c n o n o not used Multi Signal Module Multi Signal Module Mul...

Page 26: ...or Module Connected to main med air pipeline Vacuum Sensor Module Connected to main vacuum pipeline Oxygen Digital Display Module Med Air Digital Display Module Vacuum Digital Display Module pin 5 pin...

Page 27: ...an in line fuse holder that is wired to a two pin plug on left side of power supply assembly Remove two pin plug from power supply 3 The incoming line voltage hot and neutral wires should be connected...

Page 28: ...ng inside sensor mounting box Note polarity of wiring and corresponding field wiring color or number for later 3 Join polarized connector in sensor mounting box to mating connector on sensor module Re...

Page 29: ...indexing pin provides for proper orientation and prevents gas service cross connection Push sensor all the way in and secure with 2 6 32 x 1 1 4 screws Repeat this process for all sensors within alarm...

Page 30: ...be closed during normal equipment operation When contacts open an alarm condition will be activat ed NOTE Each pair of terminals labeled on the multi signal module connector is labeled and COM Ensure...

Page 31: ...bel s into slits in front panel overlay Field Wiring Cable Shield Grounding All field wiring cable shields must be grounded inside alarm panel back box A grounding screw is provided in upper right cor...

Page 32: ...led Low Relay will activate opening its contacts Relay contacts will remain open as long as alarm condition is active even if audible alarm is silenced by MUTE button Finish Installation Building Auto...

Page 33: ...odule within alarm panel is field programmed with a unique network address Using this address Johnson Controls system can monitor alarm panel status including digital pressure readings and programmed...

Page 34: ...rm up audible and visual alarms are initiated for any active alarm 3 Press MUTE button to silence audible alarm 4 Pressurize piping system medical gas and vacuum 5 Make following observations Digital...

Page 35: ...K P P A A kPa P P S S I I psig I I N N K K 9 9 in Hg N N N N K K 9 9 mm Hg 5 Press and release TEST button The LOW indicator will illuminate and L L O O will be displayed After two seconds current low...

Page 36: ...identification Used to set digital display module s gas service identification for communication with a digital sensor User choices are 0 0 2 2 oxygen N N 2 2 0 0 nitrous oxide A A R R medical air U...

Page 37: ...e saved Set up must be completed and module must dis play D D O O N N E E in order for changes to be saved then current network data format Select desired data format by pressing or buttons 5 Press an...

Page 38: ...d location Signal 2 will be illuminated 6 Using either or buttons enable or disable Signal 2 location When red LED is illuminated location is enabled Turning off red LED disables location 7 Repeat ste...

Page 39: ...it 7 green 1 Press and HOLD set up button Audible alarm will chirp when set up button is first pushed and again two seconds later Release button after second audible alarm chirp Multi signal alarm mod...

Page 40: ...it is reached 5 Press and release TEST button to save changes LEDs will sweep from top to bottom to indicate end of set up sequence Multi signal module will return to monitoring mode Operation Set Up...

Page 41: ...T E E S S T T is displayed All LED display segments and LOW NORMAL and HIGH indicators flash for five seconds firmware up to revision 1 0 3 LED display segments and LOW NORMAL and HIGH indicators ill...

Page 42: ...t 0 number 1 All indicators quickly flash Second digit is determined to be 0 because no indicators are illuminated for two seconds All indicators quickly flash Third digit of is determined by two seco...

Page 43: ...tor 4 Verify DC voltage is 4 5 to 5 5 volts 5 Measure voltage between black and red wires 6 Verify DC voltage is 22 0 to 26 0 volts 7 If voltages above are not within specification verify correct AC i...

Page 44: ...1 Testing Figure 26 Power Supply Output Testing Figure 27 Power Supply AC Input Testing Three wire harness from power supply Black gnd Orange 5 Red 24 Annunciator Module Line black Neutral white Power...

Page 45: ...ls have two 20 wire ribbon cables attached to annunciator connectors J1 and J2 Remove suspect cable both ends and replace with other cable If problem is corrected replace faulty cable c If alarm panel...

Page 46: ...MUTE button When MUTE button is pressed visual indicator continues to flash a 20 wire ribbon cable not connected well to annunciator module or digital display multi signal module with visual alarm b F...

Page 47: ...tivate on either master alarm when source contacts open a Correct field wiring Verify common wire of both master panels are connected to same side of source equipment switch 9 Multi signal alarm will...

Page 48: ...ule c Faulty sensor module a Apply appropriate pressure or vacuum to pipeline b If alarm panel contains another working digital display module remove field wiring connector from suspect module and con...

Page 49: ...h F F 4 4 display on digital display module Gas vacuum service mismatch between digital display module and digital sensor module as a result of a Sensor wired to wrong digital display module b Digital...

Page 50: ...y includes item 2 4 6 811611 00 Screw 6 32 x 7 16 Pan Head 5 6 838104 00 Lanyard 6 6 814669 00 Screw 6 20 x 1 4 Pan Head Self Tapping 7 6 811752 00 Screw 6 32 x 1 1 4 Pan Head 8 6 811058 00 Screw 4 40...

Page 51: ...Supply Ground 5 6 231941 00 Wire Harness Ground 6 6 814008 00 Screw Grounding 7 6 231937 00 Wire Harness AC Input 8 6 231939 00 Wire Harness Fuse 9 Included In Item 11 Nut Fuse Holder 10 6 616506 00...

Page 52: ...CO2 6 129340 23 He O2 6 129340 24 O2 He 6 129340 25 Helium 6 129340 26 Lab Air 6 129340 27 Lab Vacuum 6 129340 28 O2 100 PSI 6 129340 29 Air 100 PSI 6 129340 30 CO2 100 PSI ITEM PART NUMBER DESCRIPTI...

Page 53: ...33021 00 CO2 O2 6 233022 00 O2 CO2 6 233023 00 He O2 6 233024 00 O2 He Field Installation Kits ITEM PART NUMBER DESCRIPTION 1 Digital Display Module 6 290980 10 Oxygen 6 290980 11 Nitrous Oxide 6 2909...

Page 54: ...54 Part No 6 847684 00 Rev D01 Notes...

Page 55: ...55 Part No 6 847684 00 Rev D01 Notes...

Page 56: ...nMed s reasonable satisfaction that such equipment has not been damaged in shipment or installation improperly installed operated outside of any published operating limits including but not limited to...

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