BeaconMedaes MEGA 2 Installation, Operation And Maintenance Instructions

Part No. 6-847684-00 Rev. D01 Pg. 1

MEGA

2

®

Medical Electronic Gas Alarm

Installation, Operation, and Maintenance Instructions

MAN 01-027

2

Part No. 6-847684-00 Rev. D01

Table of Contents

Introduction

Alarm Modular Components...............................................................................4

Definitions...........................................................................................................5

Alarm Configuration............................................................................................6

Unpacking ..............................................................................................................7

Rough-In Installation

Alarm Panel Back Box Mounting........................................................................8

Remote Sensor Back Box Mounting ..................................................................9

Pipeline Connection

Sensor Module .............................................................................................9

Pressure Switch..........................................................................................10

Wiring Installation

General Requirements......................................................................................11

Wire Type and Size ..........................................................................................11

Wire Routing Inside The Alarm 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

Remote Sensors.........................................................................................28

Local Sensors.............................................................................................29

Remote Sensor Wiring .....................................................................................29

Source Equipment Wiring.................................................................................30

Field Wiring Cable Shield Grounding ...............................................................31

Building Automation System Wiring

Multi-Signal Module Relays........................................................................32

Digital Display Module High/Low Relays....................................................32

Annunciator Module General Fault Relay ..................................................32

Annunciator Module Auxiliary Relay (optional)...........................................32

Johnson Controls METASYS® System......................................................33

Slave Panel Wiring ...........................................................................................33

3

Part No. 6-847684-00 Rev. D01

Table of Contents

Operation

Start-Up and Checking .....................................................................................34

Set-Up Procedure

Digital Display Module ................................................................................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 ........................................................................................45

Replacement Parts

Front Panel Components .................................................................................50

Back Box Components.....................................................................................51

Sensor Components.........................................................................................52

Field Installation Kits.........................................................................................53

4

Part No. 6-847684-00 Rev. D01

Annunciator Module

Features:

• User interface
pushbuttons for alarm
panel TEST function,
audible alarm MUTE

and set-up increase

! and decrease ".

• Green alarm panel
POWER ON and red
audible alarm mute
indicators.

• Audible alarm with
volume control.

• Network wiring terminals and test
connector.

• General fault relay that activates on any
alarm panel fault condition.

Alarm Modular Components

Introduction

Digital Display Module

Features:

• Digital LED readout
of system pressure
signal transmitted
from sensor module.

• Adjustable
brightness of digital
LED readout.

• Individual LED’s indicate when system
pressure/vacuum is HIGH (red), LOW
(red), or NORMAL (green).

• Programmable high 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 remote
applications.

• Can be networked to communicate with a
personal computer or Johnson Controls
Metasys® building automation
system(using Metasys Integrator).

Multi-Signal Module

Features:

• Monitors up to five
normally closed dry­contact switch
signals.

• Separate indicators
for each of five
signals for normal
(green) or abnormal (red) conditions.

• Available (optional) with separate dry­contact relay outputs for each of five
signals.

• Can be networked to communicate with a
personal computer or Johnson Controls
Metasys® building automation system
(using Metasys Integrator).

Blank Module

Features:

• Reserves a space in
alarm panel for
future expansion.

• Used to fill unused
alarm panel module
locations.

5

Part No. 6-847684-00 Rev. D01

Definitions

Area Alarm Panel

Alarm panel that monitors medical gas and
vacuum systems serving a specific area.

Auxiliary Fault Relay (optional)

A single-pole double-throw dry-contact relay
output located on annunciator module. Used
to activate a remote alarm or building
management system. The relay will activate
whenever ANY audible alarm on panel is in

progress. Pressing MUTE button on
annunciator module deactivates relay until
audible alarm is again reactivated. Relay
contact ratings are 2 A @ 30 VDC/0.5 A @
125 VAC.

Dry-Contact

An electrical contact that is isolated or
unconnected from any electrical source.

General Fault Relay

A single-pole double-throw dry-contact relay
output located on annunciator module. Used
to activate a remote alarm or building
management system. The relay will activate
whenever ANY audible alarm on panel is in
progress. Unlike Auxiliary Fault Relay,

pressing MUTE button on annunciator
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 VAC.

LED

Light Emitting Diode

Local Sensors

Pressure/vacuum sensors that are mounted
inside alarm panel box. The sensor rough-in
must be piped to medical gas/vacuum
pipelines.

Master Alarm Panel

Alarm panel that monitors medical gas and
vacuum source equipment and main pipelines.

Remote Sensors

Pressure/vacuum sensors that are mounted
outside of alarm panel box. Sensor rough-ins
may be mounted separately or ganged together
near pressure/vacuum pipelines. Sensors must
then be wired to alarm panel.

All MEGA2 alarm panels are factory pre­configured. The configuration of alarm panel
varies dependent upon customer’s
requirements.
Two sizes of alarm panels are available. The
small alarm panel (Figure 1) will accommodate
an annunciator module with four alarm
modules. The large alarm panel (Figure 2) will
accommodate an annunciator module with
eight alarm modules.

Figure 1: Four Module Panel

Figure 2: Eight Module Panel

Alarm Configuration

Introduction

6

Part No. 6-847684-00 Rev. D01

Alarm Configuration

Introduction

An alarm panel may consist of any
combination of digital display modules, multi­signal modules, or blank modules.

If alarm panel is configured with digital display
modules, pressure/vacuum sensors will be
included for connection to pressure/vacuum
pipeline (except for 6-M2N).

Sensors may be located inside alarm panel
rough-in box (local sensors) or outside alarm
panel rough-in box (remote sensors).

Local sensors must be connected to
pressure/vacuum pipelines via copper tubing
(Figure 3). Remote sensor may be mounted
near pressure/vacuum pipeline and then wired
to alarm panel (Figure 4).

The required alarm panel configuration may be
specified within the part number scheme as
described below:

Part Number Scheme:

6-M2 ?

- ? ? ? ?

? ? ?

?

Figure 3: Local Sensors

Figure 4: Remote Sensors

1 2 3 4 5 6 7 8

Position within alarm
panel (Figures 1 and 2)

L = Local Sensors
R = Remote Sensors
N = No Sensors

(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-He

C

CARBON DIOXIDE

G

CARBON DIOXIDE - 100 PSI

1

CO2-O2

3

He-O2

H

HELIUM

V

VACUUM

6

VACUUM (ISO)

8

LABORATORY VAC

W

WAGD

N

NITROGEN

9

INSTRUMENT AIR

DIGITAL DISPLAY MODULES

M

MULTI-SIGNAL MODULE

R

MULTI-SIGNAL MODULE W/ RELAYS

B

BLANK

Sensor modules are
mounted inside the
alarm panel box

Copper tubes connect to
pressure/vacuum
pipelines

Sensors have separate
mounting boxes for mounting
near pressure/vacuum
pipeline and then must be
wired to alarm panel

Copper tubes connect to
pressure/vacuum
pipelines

NOTE:

When an alarm panel is ordered with either local
or remote sensors, ALL sensors will either be
local or remote. Alarm panels with a combination
of local and remote sensors are not available.

NOTE:

Alarm panel components in table above are listed
in order of criticality. Unless otherwise specified,
the most critical component will fill position one,
the next less critical component will fill position
two, etc. etc.

7

Part No. 6-847684-00 Rev. D01

Introduction

Alarm Configuration

Example: P/N 6-M2R-OAVB

Example: P/N 6-M2R-OXAVNWMM

Unpacking

1. Remove alarm panel back box from
shipping carton. Do not remove alarm
front 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 shipping carton.

3. Store all other components not
removed in steps 1 and 2 inside
shipping carton in a safe place for
installation later.

4. Install back box and sensor rough-in
as described in this manual.

8

Part No. 6-847684-00 Rev. D01

Rough-In Installation

The alarm panel back box will be one of
two sizes. The height and depth of both
size boxes are the same. Refer to Figure
5 below for dimensions of both boxes.

If alarm panel is configured with digital
display modules, sensor assemblies will
be included for connection to
pressure/vacuum pipeline.

Sensors may be located inside alarm
panel rough-in box (local sensors) or
outside alarm panel rough-in box (remote
sensors).

If equipped with local sensors, copper
tubes will extend from top of back box to
be connected to pressure/vacuum
pipeline.

Figure 5: Alarm Panel Back Box Dimensions

Alarm Panel Back Box Mounting

1. Prepare a rough wall opening large
enough to accommodate 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 back box.

2. Remove cardboard dust cover and
insert alarm panel back box into wall
opening. Secure with fasteners
suitable for vertical supports as shown
in Figure 6.

3. Mounting brackets on each side of
back box are adjustable and factory
preset for 5/8” thick drywall. After
drywall installation, front edge of back
box should be flush with finished
surface of wall. If needed, make any
necessary bracket adjustments at this
time. Refer to Figure 7.

4. Reinstall cardboard dust cover.

Figure 6: Back Box Mounting

Two choices of
conduit holes for
entrance of AC
mains power

Small box - (four modules)

Large box - (eight modules)

top entry

side entry

For top entry, remove
shield for access.
Reinstall shield after
connection is made

9

Part No. 6-847684-00 Rev. D01

Figure 7: Mounting Bracket Adjustment

Rough-In Installation

Pipeline Connection

Figure 8: Remote Sensor Back Box

Sensor Module

1. Braze copper extension tubes from
sensor rough-in to appropriate
pressure/vacuum piping system drops
as shown in Figure 9. Braze
connections per procedures required
by NFPA 99 or CAN/CSA-Z305.1.
Use appropriate measures to prevent
overheating and damage to internal
components of sensor rough-in
assemblies.

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 mounting

Alarm panels ordered with remote
sensors are provided with separate metal
boxes for each sensor. Mount each
sensor box as follows:

1. Remove sensor rough-in from
mounting box (Figure 8).

2. Using four mounting holes provided,
attach box to a wall or other structural
support. (fasteners by others).

3. Reinstall sensor rough-in.

Rear conduit knockouts
(either side) are recommend­ed for sensor wiring

Alarm Panel Back Box Mounting

Remote Sensor Back Box Mounting

10

Part No. 6-847684-00 Rev. D01

Rough-In Installation

Pipeline Connection

Pressure Switch

DISS (Diameter Index Safety System)
connection kits are recommended for use
when attaching pressure switches to
pressure/vacuum pipeline. To utilize
these kits, a 1/4-18 NPT female thread
must be provided in piping system. All
necessary components are included in
each gas specific kit as shown in Figure

10.

Figure 10: Pressure 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
6-120004-19 Evac. (WAGD)
6-120004-20 Carbon Dioxide
6-120004-21 CO2/O2
6-120004-22 O2/CO2
6-120004-23 He/O2
6-120004-24 O2/He
6-120004-25 Helium

To pipeline

To pressure switch

DISS male

body

with check

DISS nut

and nipple

Figure 9: Sensor Pipeline Connection

Connection
should be made
on top of pipe

Horiz. run of pipeline

Horiz. run of pipeline

Connection
should be made
on top of pipe

REMOTE SENSOR

LOCAL SENSOR

11

Part No. 6-847684-00 Rev. D01

Wiring Installation

• Power all alarms from life safety
branch of emergency power system as
required by applicable standards.

• Protect all wiring from physical
damage by raceways or conduit as
required by applicable standards.

• Wire master panels directly to
switches or sensors as required by
applicable standards.

• Wiring runs should be made with color
coded wire. Record color, signal, and
source of signal for each wiring lead to
aid in connection of alarm finish
components.

• Avoid installing alarm panels near
radio transmitters, electrical motors, or
switchgear.

Figure 11: Wire Routing

General Requirements

Wire Type And Size

Wire Routing

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 be twisted pair shielded
type. Multi-pair cables within one
common shield are acceptable.

Two 7/8” holes are provided for entrance
of AC mains power. One hole on lower
left side and one hole on top left of alarm
panel back box. NO OTHER HOLES
SHOULD BE PUNCHED OR USED. If
hole on top left is used, remove shield for
access. Reinstall shield after connection
is made.

Several additional 7/8” holes are provided
on right side of top panel for entrance of
low voltage field wiring. Refer to Figure

11.

Two choices of
conduit holes for
entrance of AC
mains power

top entry

side entry

For top entry, remove
shield for access. Reinstall
shield after connection is
made

12

Part No. 6-847684-00 Rev. D01

Wiring Installation

MEGA2 alarm panels can be ordered in
numerous configurations. The following
rules along with references to this
manual’s schematics clarify wiring
requirements.

• All alarm panels require 100 to 250
VAC 50/60 Hz. power. Refer to
Wiring Schematic 1 (Pg. 14).

• Sensor modules send
pressure/vacuum signals to digital
display modules. If the alarm panel
configuration contains digital display
modules and sensor modules that are
remotely mounted, two conductors are
required between EACH sensor
module and digital display module. A
sensor module can not be wired to
more than one digital display module.
Refer to Wiring Schematic 2 (Pg. 15).

• Multi-signal modules monitor signals
from dry normally closed switch/relay
contacts. These signals can originate
at source equipment or from pressure
switches mounted on main
pressure/vacuum pipelines. When two
master alarms are required, the same
switch/relay contacts can be wired to
both alarm panels. Two conductors
are required 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 switch/relay
contacts. This wiring is duplicated for
each source equipment/pressure
switch signal. Refer to Wiring
Schematics 3 and 8 (Pgs. 16 and

20).

Determining Number Of Conductors

• Two panels may be connected
together so digital display module
pressure reading(s) of first panel will
be duplicated at second panel. Two
conductors for EACH digital display
module must be routed from first
alarm panel to second alarm panel.
Refer to Wiring Schematic 4 (Pg. 17).

• If an alarm panel is to be connected to
a Johnson Controls METASYS®
system, two conductors must be
connected between alarm panel’s
annunciator module and monitoring
system’s two-wire data bus. Refer to
Wiring Schematic 9 (Pg. 21).

• Most building automation systems are
capable of monitoring dry normally
closed relay contacts. If alarm panel
is to be connected to this type of
building automation system, two
conductors must be routed from alarm
panel to building automation system
for each signal monitored. Refer to
Wiring Schematics 5,6, and 7 (Pgs.
18 and 19).

13

Part No. 6-847684-00 Rev. D01

Wiring Schematics Alarm Wiring Examples

Wiring Installation

The wiring schematics listed below are
provided. Call BeaconMedæs at 1-888­4MEDGAS (1-888-463-3427), for technical
support .

1. Power Supply Module

2. Sensor Module to Digital Display
Module

3. Multi-Signal Module

4. Remote Pressure/Vacuum
Transmission

5. Multi-Signal Module Relays

6. General Fault/Auxiliary Relays

7. Digital Display Module 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
displays - high-pressure manifold/no
reserve (oxygen shown) - Pg. 22.

2. Two master alarm panels with digital
displays - liquid manifold/high-pressure
reserve (oxygen shown) - Pg. 23.

3. Two master alarm panels with digital
displays - liquid bulk/liquid reserve
(oxygen shown) - Pg. 24.

4. Two multi-signal master alarm panels ­duplex air compressor and vacuum
pump systems - Pg. 25.

5. Area alarm panel - gas services for
oxygen, medical air, and vacuum - Pg.

26.

14

Part No. 6-847684-00 Rev. D01

Wiring Schematic 1: Power Supply Module

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 Mains Power Connections

Ground

Screw

Red

Orange

Black

Red

Orange

Black

15

Part No. 6-847684-00 Rev. D01

Wiring Schematic 2: Sensor Module to Digital Display Module

Digital Display Module

Digital Display Module

Remote sensor mounting box

(remote from alarm panel)

Local sensor

(inside alarm panel back box)

2-pin polarized 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:

Sensor pigtails for local sensors
are factory connected to digital dis­play module.

Pin 5 - red (+)

Pin 6 - black (-)

Pin 5 (+)

Pin 6 (-)

NOTE:

Field wiring cable shields must be grounded at
only one end, inside alarm panel back box. Refer
to page 31 for details.

16

Part No. 6-847684-00 Rev. D01

Wiring Schematic 3: Multi-Signal Module

SIGNAL 1

SIGNAL 2

SIGNAL 3

SIGNAL 4

SIGNAL 5

Dry normally-closed
contacts at source
equipment or line
pressure switches

COM

+

COM

+

COM

+

COM

+

COM

+

ribbon to
adjacent
module

ribbon to
adjacent
module

Pin 1

Pin 10

Pin 1

Pin 10

Multi-Signal 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 - pin 9 (+), pin 10 (COM)

NOTE:

Installer assigns source signals to desired front panel locations
and installs provided labels (Refer to Figure 23, page 31).

Multi-Signal Module front panel

NOTE:

Field wiring cable shields must be grounded at
only one end, inside alarm panel back box. Refer
to page 31 for details.

17

Part No. 6-847684-00 Rev. D01

Wiring Schematic 4: Remote Pressure / Vacuum Transmission

Digital Display Module

at master alarm panel

Digital Display Module

at slave alarm panel

Signal from

sensor module

Pin 5 (+)

Pin 6 (-)

Master output
to slave

Pin 4 (-) / Pin 3 (+)

Slave input
from master

Pin 1 (+)

Pin 2 (-)

ribbon 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, EACH mas­ter panel must be directly connected to a Sensor Module for each pressure/vacu­um service. Additional panels, if desired, may be connected as indicated above.

NOTE:

Field wiring cable shields must be grounded at
only one end, inside alarm panel back box. Refer
to page 31 for details.

18

Part No. 6-847684-00 Rev. D01

Wiring Schematic 5: Multi-Signal Module Relays (Optional)

SIGNAL 1

SIGNAL 2

SIGNAL 3

SIGNAL 4

SIGNAL 5

Dry normally-closed
contacts at source
equipment or line
pressure switches

COM

+

COM

+

COM

+

COM

+

COM

+

Multi-Signal Module

ribbon to
adjacent
module

SIGNAL 1 - pins 1 & 2

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 alarm activation. Contacts remain open until
alarm condition is corrected. Alarm mute DOES NOT affect relay
condition.

Relay contact ratings are 2 A @ 30 VDC/0.5 A @ 125 VAC

.

NOTE:

Field wiring cable shields must be grounded at
only one end, inside alarm panel back box. Refer
to page 31 for details.

19

Part No. 6-847684-00 Rev. D01

Wiring Schematic 6: General Fault / Auxiliary Relays

Wiring Schematic 7: Digital Display Module High / Low Relays

Annunciator Module

Digital Display Module

ribbon to
adjacent
module

General Fault Relay

N/C (pin 5)

N/O (pin 3)

Common (pin 4)

N/O (pin 6)

Common (pin 7)

N/C (pin 8)

Auxiliary Relay

NOTE:

General Fault Relay

activates when ANY

alarm on panel is in progress. Pressing

MUTE on Annunciator Module DOES
NOT reset relay. Relay deactivates when
alarm condition is corrected.

Auxiliary Relay (optional)

activates when

ANY audible alarm on panel is in progress.

Pressing MUTE on Annunciator Module
WILL deactivate 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 Relay

NOTE:

High Alarm Relay activates when high line
pressure alarm on digital display module is
in progress. When relay activates normally

closed contacts open. Pressing MUTE
on Annunciator Module DOES NOT deacti­vate relay. Relay deactivates when high line
pressure alarm condition is corrected.

Low

Alarm Relay activates when low line
pressure alarm on digital display module is
in progress. When relay activates normally

closed contacts open. Pressing MUTE
on Annunciator Module DOES NOT deacti­vate relay. Relay deactivates when low line
pressure alarm condition is corrected.

Relay contact ratings are 2A @ 30 VDC/0.5
A @ 125 VAC.

20

Part No. 6-847684-00 Rev. D01

Wiring Schematic 8: Remote Pressure / Vacuum Switches

P/N 6-129020-01 (Dual switch for medical gases with 50 PSI nominal pressure)

P/N 6-129021-01

(Dual switch for medical gases with 175 PSI nominal pressure)

P/N 6-129022-01 (Single switch for vacuum)

1/4 NPT female port

1/4 NPT
female port

seven - approx. 18” free leads
through 3/4” conduit connection

terminal strip

1/2” conduit
connection

ground
screw

low

high

adjustment
dials

high

low

high

yellow

brown*

orange*

purple*

red*

blue

(N/C)

(N/C)

(N/O)

(N/O)

(C)

(C)

NOTE:

Switch contacts shown with
50 PSI pressure applied.

Low switch is
preset at 40 PSI.

High switch is preset at 60
PSI.

*Wires/contacts to be used with MEGA2 alarm system

adjustment
screws

NOTE:

Switch contacts shown with 20
inHg vacuum 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
preset at 140 PSI.

High switch is preset at 190 PSI.

*Wires/contacts to be used with MEGA2 alarm system

1/4 NPT female port

four - approx. 18” free leads
through 3/4” conduit connection

low

adjustment
dial

*Wires/contacts to be used with MEGA2 alarm system

low

purple*

red*

blue

(N/C)

(N/O)

(C)

green

ground

P/N 0208-5096-300 (Single switch for medical gases with 175 PSI nominal pressure)

1/4 NPT male port

three - approx. 12” free leads
through 1/2” NPT conduit connection

adjustment
sleeve

NOTE:
2 Switches Required.

Switch contacts shown
with 175 PSI pressure
applied.

Switch is preset at 195
PSI increasing.

Installer must set low
switch to 140 PSI
decreasing.

*Wires/contacts to be used with MEGA2 alarm system

low

purple*

red*

blue

(N/C)

(N/O)

(C)

high

purple*

red

blue*

(N/C)

(N/O)

(C)

21

Part No. 6-847684-00 Rev. D01

Wiring Schematic 9: Johnson Controls 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 1)

Serial - (pin 2)

NOTE:

Maintain correct network wiring polarity.

22

Part No. 6-847684-00 Rev. D01

Typical Master/Area Alarm Wiring Examples

MAIN LINE

MAIN LINE

O2 Secondary

Supply

O2 Secondary

Supply

MASTER ALARM PANEL #1

MASTER ALARM PANEL #2

Oxygen

Sensor
Module

Oxygen

Sensor

Module

Digital Display Module

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-closed contacts at

high-pressure oxygen manifold

Example 1: Two master alarm panels with digital displays -

high-pressure manifold/no reserve (oxygen shown).

NOTE:

Switch contacts must be dry,
normally-closed type. Alarm
activates when contacts open.

Com

23

Part No. 6-847684-00 Rev. D01

MASTER ALARM PANEL #1

MASTER ALARM PANEL #2

MAIN LINE

MAIN LINE

O2 Secondary

Supply

O2 Reserve

In Use

O2 Reserve

Low

O2 Secondary

Supply

O2 Reserve

In Use

O2 Reserve

Low

Oxygen

Sensor
Module

Digital Display Module

pin 5 (+)pin 6 (-)

Connected to main

oxygen pipeline

Oxygen

Sensor
Module

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 (+)

Reserve In Use -

from liquid O2 system

Reserve Low -

from liquid O2 HP back-up

NOTE:

Switch contacts must be dry,
normally-closed type. Alarm
activates when contacts open.

Example 2: Two master alarm panels with digital displays -

liquid manifold/high-pressure reserve (oxygen shown).

Typical Master/Area Alarm Wiring Examples

24

Part No. 6-847684-00 Rev. D01

MASTER ALARM PANEL #1

MASTER ALARM PANEL #2

MAIN LINE

Oxygen

Sensor
Module

Oxygen

Sensor

Module

Digital Display Module

Digital Display Module

Multi-Signal Module

Multi-Signal Module

pin 1

pin 5 (+)pin 6 (-)

pin 5 (+)

pin 6 (-)

pin 1

Connected to main

oxygen pipeline

Connected to main

oxygen pipeline

Example 3: Two master alarm panels with digital displays -

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

Liquid Low

O2 Reserve Tank

Pressure Low

O2 Reserve

In Use

O2 Main Tank

Liquid Level Low

O2 Reserve

Liquid Level Low

O2 Reserve Tank

Pressure Low

Main Tank Liquid Low -

from main bulk tank

Com

Com

Com

Reserve In Use -

from bulk O2 system

Com

Res. Tank Pressure Low -

from reserve bulk tank

Res. Tank Liquid Low -

from main bulk tank

Typical Master/Area Alarm Wiring Examples

25

Part No. 6-847684-00 Rev. D01

B

A

C

D

E

F

G

H

I

J

K

L

M

N

A
B
C
D
E
F
G
H

I
J

K

L
M
N

Example 4: Two multi-signal master alarm panels -

duplex air compressor and vacuum pump systems.

O

P

Q

R

O

P
Q

R

Typical Master/Area Alarm Wiring Examples

Med. Air Line

Pressure Low

Med. Air Line

Pressure High

Med. Air

CO High

Med. Air

Dew Point High

Med. Air

Lag Compressor

Air Comp.

High Temp.

Low Line

Vacuum

Lag Vacuum

Pump

Vacuum Pump

High Temp.

Med. Air Line

Pressure Low

Med. Air Line

Pressure High

Med. Air

CO High

Med. Air

Dew Point 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

Multi-Signal Module

Multi-Signal Module

Med. Air Line Pressure Switch -

connected to main med. air pipeline

High Dew Point -

from air comp. panel

High Carbon Monoxide -

from air comp. panel

Air Compressor Lag -

from air comp. panel

High Temp. # 2 -

from air comp. panel

High Temp. # 1 -

from air comp. panel

LOW

com

n/c - not used

n/o

High Temp. # 2 -

from vac pump panel

High Temp. # 1 -

from vac pump panel

Vacuum Pump Lag -

from vac pump panel

MASTER ALARM PANEL #1

MASTER ALARM PANEL #2

Vacuum Line Pressure Switch -

connected to main vacuum pipeline

26

Part No. 6-847684-00 Rev. D01

Example 5: Area alarm panel - gas services for

oxygen, medical air, and vacuum.

I. C. U.

I. C. U.

I. C. U.

Oxygen

Sensor
Module

Connected to main

oxygen pipeline

Med. Air

Sensor
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 6 (-)

pin 5 (+)

pin 6 (-)

pin 5 (+)

pin 6 (-)

Typical Master/Area Alarm Wiring Examples

NOTE:

Field wiring cable shields must be grounded at
only one end, inside alarm panel back box. Refer
to page 31 for details.

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)

28

Part No. 6-847684-00 Rev. D01

Finish Installation

4. The alarm panel’s power supply is
factory installed with a three-wire
harness attached to its right side.
Connect loose end of three wire
harness to male connector on
annunciator module circuit board as
shown in Figure 15. The harness
connector is keyed to prevent incorrect
orientation, however, use care to
ensure correct pin alignment.

Figure 15: Power Supply Wire Harness

Remote Sensors:

1. Remove sensor module from shipping
carton. Each sensor module is
shipped with a wiring pigtail that has a
two-pin polarized connector.

2. Wire nut pigtail to field installed wiring
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. Refer to Figure 16.

4. Insert sensor into valve opening in
sensor rough-in. An indexing pin
provides for proper orientation and
prevents gas service cross­connection. Push sensor all the way
in and secure with (2) #6-32 x 1-1/4”
screws.

Figure 16: Sensor Module Connection

NOTE:

Remove the blue protective netting from the sen­sor connector.

Sensor Installation

Annunciator Module

Power Supply

Three-wire harness

Front Panel Installation

Valve opening

Sensor

Polarized
connector

Male connector

NOTE:

Field wiring cable shields must be grounded at
only on one end, inside alarm panel back box.
Refer to page 31 for details.

black

red

29

Part No. 6-847684-00 Rev. D01

1. Identify each pair of field installed
sensor wires inside alarm panel back
box assembly. Note polarity of each
wire from previously installed remote
sensor module.

2. Route each pair of sensor wires as
shown in Figure 18 to appropriate
digital display module. Each digital
display module is labeled with the gas
type. Verify the appropriate remote
sensor wires are connected to correct
digital display module.

Finish Installation

5. Tuck excess wiring into open space
behind sensor.

6. Mark location monitored by sensor in
space provided on sensor label. Refer
to Figure 17.

Local Sensors:

1. Remove sensor module from shipping
carton.

2. Insert sensor into valve opening in
pressure/vacuum service rough-in. An
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 1­1/4” screws. Repeat this process for
all sensors within alarm panel.

3. The digital display module(s) located
on front panel assembly are factory
wired with a harness and polarized
two-pin connector for each sensor
module. Each digital display module
is labeled with the gas type. Match
gas type of each sensor to gas type of
each digital display module and join
polarized connectors of sensor and
digital display module harnesses.

4. Mark location monitored by sensor in
space provided on sensor label. Refer
to Figure 17.

Figure 17: Sensor Module Location Label

Remote Sensor Wiring

Figure 18: Remote Sensor Wire Routing

NOTE:

Remove the blue protective netting from the sen­sor connector.

Location label

Holes provided for
entrance of remote wiring

Route wires behind
metal brace

Sensor Installation

30

Part No. 6-847684-00 Rev. D01

1. Identify each pair of field installed
source equipment signal wires inside
alarm panel back box assembly.

2. Route each pair of signal wires as
shown in Figure 21 to appropriate
multi-signal module.

3. Connect each pair of signal wires to
desired multi-signal module terminals.
The terminals are labeled “Signal 1”
through “Signal 5”. Signal 1
corresponds to top row of indicators
on front panel of multi-signal module.
Signal 5 corresponds to bottom row.
Refer to Figure 22.

4. Insert appropriate source equipment
label into multi-signal module front
panel as shown in Figure 23. A sheet
of common source equipment signals
has been provided for convenience.
Blank labels are also provided.

Finish Installation

Source Equipment Wiring

CAUTION:

Source equipment signal wires must be connect­ed to normally-closed, dry contacts. No electrical
voltage can be present and contacts must be
closed during normal equipment operation. When
contacts open, an alarm condition will be activat­ed.

NOTE:

Each pair of terminals labeled on the multi-signal
module connector is labeled “+” and “COM”.
Ensure that when a source equipment dry contact
is wired to two master panels, the same side of
the dry contact is connected to the same terminal
at both panels. For example, if the source equip­ment’s normally closed contact is wired to the “+”
of the first master panel, ensure it is also connect­ed to the “+” terminal of the second master panel.

3. Connect positive sensor wire to
terminal 5 and negative sensor wire to
terminal 6 for each remote sensor and
digital display module. Refer to Figure

19.

4. Blank digital display module location
labels are provided so each digital
display module may be identified with
area/zone that it is monitoring. Insert
location labels (if desired) as shown in
Figure 20.

Figure 19: Remote Sensor Wire Termination

Digital Display Module

From remote sensor

Pin 5 (+)

Pin 6 (-)

Figure 20: Digital Display Module

Remote Sensor Wiring

Label

(provided)

Slide label into slit in
front panel overlay

31

Part No. 6-847684-00 Rev. D01

Figure 23: Multi-Signal Front Panel Labeling

Finish Installation

Source Equipment Wiring

Figure 21: Source Equipment Wire Routing

Holes provided for
entrance of remote wiring

Route wires behind
metal brace

Figure 22: Source Signal Wiring Termination

Multi-Signal Module

Signal 1

Signal 2

Signal 3

Signal 4

Signal 5

Sample label

(provided)

Slide label(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
corner of alarm back box as shown in
Figure 24. Shields from several cables
may be wrapped together and crimped into
one ring lug (by others) .

Figure 24: Field Wiring Cable Shield Grounding

Cable shield

grounding screw

(crimp lug not provided)

CAUTION:

Keep shield wires to ground screw as short as
possible so they can not touch front panel circuit
boards when front panel is closed

32

Part No. 6-847684-00 Rev. D01

There are several methods of connecting
MEGA2 alarm panels to a building
automation system depending upon what
type of information is required and what
type of building automation system is
being used.

Multi-Signal Module Relays:

As an option, mutli-signal modules may
be ordered with five output relays, one for
each of five signals that multi-signal is
capable of monitoring. Each relay has a
set of dry, normally-closed contacts that
will open when an alarm is activated on
corresponding front panel signal. For
example, when an alarm condition
activates on top multi-signal front panel
alarm location (Signal 1), relay labeled
“Signal 1” 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. When alarm condition is
corrected, relay contacts will close.

Relay
contact ratings are 2 A @ 30 VDC/0.5 A @
125 VAC. Refer to Schematic 5 (Pg. 18).

Digital Display Module High/Low
Relays:

Each digital display module is supplied
with two separate output relays. One
relay for high line pressure alarm and
another for low line pressure alarm.
Each relay has a set of dry, normally­closed contacts that will open when an
alarm is activated on corresponding front
panel signal. For example, when a low
pressure alarm condition activates on
digital display module front panel, relay
labeled “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 Automation System Wiring

When alarm condition is corrected, relay
contacts will close. Relay contact ratings
are 2 A @ 30 VDC/0.5 A @ 125 VAC.
Refer to Figure Schematic 7 (Pg. 19).

Annunciator Module General Fault Relay:

The annunciator module is supplied with
an alarm panel general fault output relay.
This relay has a set of dry contacts that
may be wired either normally open or
normally closed. The relay will activate
when ANY alarm on ENTIRE alarm panel
is activated. Relay will remain activated
as long as alarm condition is active, even

if audible alarm is silenced by MUTE
button. When alarm condition is
corrected, relay will deactivate. Relay
contact ratings are

2 A @ 30 VDC/0.5 A @

125 VAC

. Refer to Schematic 6

(Pg. 19).

Annunciator Module Auxiliary Relay:

As an option, annunciator module may be
supplied with an additional auxiliary relay.
This auxiliary relay does not replace
general fault relay described above.
Auxiliary relay has a set of dry contacts
that may be wired either normally open or
normally closed. Like general fault relay,
auxiliary relay will activate when ANY
alarm on ENTIRE alarm panel is initiated.
Unlike general fault relay, auxiliary relay
will deactivate when audible alarm is

silenced by MUTE button. If alarm
condition is still active when mute function
cancels, auxiliary relay will reactivate.
Relay contact ratings are 2 A @ 30
VDC/0.5 A @ 125 VAC. Refer to
Schematic 6 (Pg. 19).

33

Part No. 6-847684-00 Rev. D01

Finish Installation

Johnson Controls METASYS® System:

The MEGA2 alarm panel is compatible
with Johnson Controls METASYS®
building automation system (Using
METASYS® Integrator). Each MEGA2
alarm panel is connected to a common
two-wire RS-485 serial computer interface
bus. Two wires are connected to pins 1
and 2 of annunciator module and then
connected to common data bus. Refer to
Schematic 9 (Pg. 21) for details. Each
digital display module and multi-signal
module 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 alarm set points.

Building Automation System Wiring

Digital display modules of two alarm
panels may be wired together in such a
way that pressure readings of first panel
can be duplicated at second panel. Each
digital display module has RS-422 digital
outputs and inputs. By connecting digital
output (master output) of first panel to
digital inputs (slave input) of the second
panel, second panel will duplicate
pressure readings. Refer to Schematic 4
(Pg. 17) for details.

Slave Panel Wiring

34

Part No. 6-847684-00 Rev. D01

Operation

Start-Up and Checking

Digital Display Module

Multi-Signal Module

Status LED

Indicators

LED Display

SIGNAL #1

SIGNAL #2

SIGNAL #3

SIGNAL #4

SIGNAL #5

Status LED

Indicators

NOTE:

If any module appears to be malfunctioning, refer
to Troubleshooting Guide.

1. Turn on electrical power to alarm

panel.

2. Make following observations:

• POWER ON light illuminates on
front of alarm panel.

• Digital display and multi-signal
modules warm-up for ten seconds.
During warm-up, no audible or
visual alarms activated. After
warm-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 display modules display

actual pipeline pressures or
vacuum levels.

• If digital display module pipeline

pressures and vacuum levels are
within pre-set limits, NORMAL
indicator is illuminated.

• If digital display module pipeline

pressures and vacuum levels are
outside pre-set limits, status
indicators show HIGH or LOW.

• If a fault code is displayed (

-- FF 11 --

,

-- FF 22 --, -- FF 33 --

or

-- FF 44 --

) refer to

Troubleshooting Guide.

• Multi-signal modules indicate

current status from dry-contact
switches. Unused signals can be
disabled. Refer to Set-Up
Procedure.

35

Part No. 6-847684-00 Rev. D01

Operation

Set-Up Procedure

Digital display modules are shipped from
the factory with the following settings:

Gas/Vacuum Alarm Set Point
Service Low High
Pressure (50 psig) 40 psig 60 psig
Pressure (100 psig) 80 psig 120 psig
Nitrogen, Instr. Air 140 psig 190 psig
Vacuum/WAGD 12 in Hg. none

Changing units and alarm set points:

1. Loosen two screws on front of alarm
panel. Hinge open alarm panel’s front
cover.

2. Locate SETUP button on circuit board
of digital display module to be adjust­ed.

3. Press and release SETUP button.
Audible alarm will chirp and

SS EE TT 11

will

be displayed.

4. Press and release TEST button on
front of alarm panel. Current unit of
measure will be displayed. Select
desired unit of measure by pressing
either ! or " buttons. Available units
of measure are:

KK PP AA

(kPa)

PP SS II

(psig)

II NN KK 99

(in Hg)

NN NN KK 99

(mm Hg)

5. Press and release TEST button. The
LOW indicator will illuminate and

LL OO

will be displayed. After two seconds
current low alarm setting will be dis­played. Select desired low alarm set­ting by pressing either ! or " but­tons. Low alarm setting ranges are:

00

to

11 33 88 00(11 77 22 55

*) (kPa)

00

to

22 00 00(22 55 00

*) (psig)

00

to

33 22

(in Hg)

00

to

88 00 00

(mm Hg)

*N2 and instrument air only, DDM firmware 1.0.6 or later

Digital Display Module

SETUP

button

TEST

button

Up and down

buttons

NOTE:

Audible alarm will chirp with each button push.

If module is idle for more than one minute during
set-up procedure, module will chirp three times,
return to monitor mode and will default to previ­ous settings. No changes to settings will be
saved.

The set-up must be completed and the module

must display

DD OO NN EE

in order for changes to be

saved.

Low alarm

indicator

High alarm

indicator

Display

Digital Display Module

36

Part No. 6-847684-00 Rev. D01

Operation

Set-Up Procedure

6. Press and release TEST button.
HIGH indicator will illuminate and

KK ,,

will be displayed. After two seconds
current high alarm setting will be dis­played. Select desired high alarm set­ting by pressing either ! or " but­tons. High alarm setting ranges are:

00

to

11 33 88 00(11 77 22 55

*) (kPa)

00

to

22 00 00(22 55 00

*) (psig)

00

to

33 22

or

NN OO NN EE

(in Hg)

00

to

88 00 00

or

NN OO NN EE

(mm Hg)

*N2 and instrument air only, DDM firmware 1.0.6 or later

7. Press and release TEST button to
save changes.

DD OO NN EE

will be dis­played for two seconds. Digital dis­play module will return to monitoring
mode.

NN DD FF

(network data format)

Defines data word length transmitted to
building automation system. User

choices are

88

(bits) or

11 66

(bits). Factory

setting is 88.

PP DD FF

(pressure data format)
Defines data word length transmitted to
a slave alarm panel. User choices are

88

(bits) or

11 66

(bits). Factory setting is 88.

The second advanced level,

SS EE TT 33

, is
used to adjust other miscellaneous
parameters as listed below:

SS EE RR UU

(gas service identification)

Used to set digital display module’s gas
service identification for communication
with a digital sensor.

User choices are:

00 22

(oxygen)

NN 22 00

(nitrous oxide)

AA ,, RR

(medical air)

UU AA ((

(vacuum)

NN 22

(nitrogen)

LL AA ,, RR

(lab air)

LL UU AA ((

(lab vacuum)

AA RR 99 NN

(argon)

(DDM firmware 1.0.6 or later)

II AA ,, RR

(instrument air)

UU AA 99 DD

(WAGD)

(( 00 22

(carbon dioxide)

(( -- 00 22

(CO2/O2)

00 22 -- ((

(O2/CO2)

KK EE 00 22

(He/O2)

00 22 KK EE

(O2/He)

KK EE

(Helium)

NN OO NN EE

(none)

OO FF FF SS

(display offset)
Used to adjust digital module’s display.
User choices are 00,11,22,

-- 11

, or

-- 22

.

Factory setting is 00.

Digital Display Module

(Advanced)

Digital Display Module

Two additional levels of “advanced” set-up
features are available.

The first advanced level,

SS EE TT 22

, is used to
adjust basic communication related
parameters. The parameters adjustable

within

SS EE TT 22

are listed below:

AA DD DD RR

(network address)

A network address uniquely identifies
each digital display module to a
personal computer or Johnson Controls

Metasys

®

system. Address range is

00

to

22 55 55

. Factory setting is 00.

BB AA UU DD

(baud rate)
Used to set communication speed.
User choices are

44 88 00 00

or

99 66 00 00

.

Factory setting is

44 88 00 00

.

NOTE:

Set to

NN OO NN EE

if using analog sensors.

37

Part No. 6-847684-00 Rev. D01

RR EE PP TT

(audible alarm repeat)

Used to set time interval for
reactivation of audible alarm after

alarm MUTE button has been
pressed. User choices are

OO FF FF,11,55

,

11 55,33 00

(minutes),

11 HH RR, 88 HH RR, 11 22 HH RR

or

22 44 HH RR

(hour). Factory setting is

OO FF FF

.

When set to

OO FF FF

, audible alarm will
not reactivate after an active alarm
has been silenced. Any new alarm will
reactivate audible alarm.

II NN TT SS

(display intensity)
Used to adjust digital module’s display
brightness. Factory setting is

maximum intensity.

Changing Communication Parameters -

(

SS EE TT 22

):

1. Press and HOLD SETUP button for
TWO seconds until

SS EE TT 22

is displayed.

2. Press and release TEST button on
front of alarm panel.

AA DD DD RR

will be
displayed for one second and then
current network address. Select

desired address by pressing ! or "
buttons. Each module must have a
unique address.

3. Press and release TEST button.

BB AA UU DD

will be displayed for one second

and then current baud rate. Select
desired baud rate by pressing ! or
" buttons.

4. Press and release TEST button.

NN DD FF

will be displayed for one second and

Operation

Set-Up Procedure

NOTE:

If module is idle for more than one minute during
set-up procedure, module will chirp three times,
return to monitor mode and will default to previous
settings. No changes to settings will be saved.

Set-up must be completed and module must dis-

play

DD OO NN EE

in order for changes to be saved.

then current network data format.
Select desired data format by
pressing ! or " buttons.

5. Press and release TEST button.

PP DD FF

will be displayed for one second and
then current pressure data format.
Select desired data format by
pressing ! or " buttons.

6. Press and release TEST button to
save changes.

DD OO NN EE

will be
displayed for two seconds. Digital
display module will return to
monitoring mode.

Changing Miscellaneous Parameters -

(

SS EE TT 33

):

1. Press and HOLD SETUP button for
FOUR seconds until

SS EE TT 33

is

displayed.

2. Press and release TEST button on
front of alarm panel.

SS EE RR UU

will be
displayed for one second and then
current gas service identification.
Select desired gas service by

pressing ! or " buttons.

3. Press and release TEST button.

OO FF FF SS

will be displayed for one second

and then current display offset. Select
offset by pressing ! or " buttons.

4. Press and release TEST button.

RR EE PP TT

will be displayed for one second
and then current audible alarm repeat
time. Select desired repeat time by

pressing ! or " buttons.

5. Press and release TEST button.

II NN TT SS

will be displayed. Select desired
display brightness by pressing !

or "
buttons. Each push will change
brightness of display. Audible alarm
will chirp one time with each push and
two times when limit reached.

6. Press and release TEST button to
save changes.

DD OO NN EE

will be
displayed for two seconds. Digital
display module will return to
monitoring mode.

Digital Display Module (Advanced)

38

Part No. 6-847684-00 Rev. D01

Operation

Set-Up Procedure

Multi-Signal Module

Changing signal options:

1. Loosen two screws on front of alarm
panel. Hinge open front cover.

2. Locate SETUP button on circuit board
of multi-signal module to be adjusted.

3. Press and release SETUP button.
Audible alarm will chirp and both
green and red indicators for top
location (Signal 1) will illuminate.

4. Using either ! or " buttons, enable
or disable Signal 1 location. When red
indicator is illuminated, location is
ENABLED. Turning off red indicator
disables location. Signal locations can
not be disabled if wired to a closed­contact circuit.

5. Press and release TEST button on
front of alarm panel. Both green and
red indicators for second 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 steps 5 and 6 above for
remaining signal locations (Signal 3, 4,
and 5).

8. Press and release TEST button to
save changes. LEDs will sweep from
top to bottom to indicate end of set-up
sequence has been reached. Multi­signal module will return to monitoring
mode.

SIGNAL 2

SIGNAL 3

SIGNAL 4

SIGNAL 5

TEST

button

Up and down

buttons

NOTE:

Audible alarm will chirp with each button push.

If module is idle for more than one minute during
set-up procedure, module will chirp three times,
return to monitor mode and will default to previ­ous settings. No changes to settings will be
saved.

The set-up must be completed in order for
changes to be saved.

Multi-Signal Alarm Module Circuit Board

SETUP

button

Green LED

Red LED

SIGNAL 1

39

Part No. 6-847684-00 Rev. D01

Operation

Multi-Signal Module (Advanced)

Set-Up Procedure

Two additional levels of “advanced” set-up
features are available. The first level is
used to adjust basic communication
related parameters. The second level is
used to adjust alarm repeat time and
display intensity.

Setting Communication Parameters:

A network address uniquely identifies
each multi-signal alarm module to a
personal computer or Johnson Controls
Metasys

®

system. Address range is 0 to

255. Factory default setting is 0. Since a
multi-signal alarm module does not have
a digital display, network address is
shown as a binary number on specific red
and green front panel LED indicators.
Table below assigns a numeric value to
each specific LED indicators. For
example, if LED indicators for bits 0, 1, 2,
and 3 were all illuminated, network
address would be 15 (1+2+4+8=15).

Binary data represented by LED indicators

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

128 64 32 16 8 4 2 1

Numeric value of each bit

SIGNAL 1

SIGNAL 2

SIGNAL 3

SIGNAL 4

SIGNAL 5

Bit 4 (green)

Bit 0 (red)

Bit 1 (red)

Bit 2 (red)

Bit 3 (red)

Bit 5 (green)

Bit 6 (green)

Bit 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. Multi­signal alarm module front panel LED
indicators (Bit 0 through Bit 7) will
show current network address. If no
indicators are illuminated, address is 0
(factory setting).

2. Using either ! or " buttons, select
desired network address between 0
and 255.

3. Press and release TEST button on
front of alarm panel. Front panel LED
indicators (Bit 0 and Bit 4) will show
current communication baud rate. If
only Bit 4 LED is illuminated, baud
rate is 4800 (factory setting). If BOTH
Bit 0 and Bit 4 LEDs are illuminated,
baud rate is 9600.

4. Using either ! or " buttons, select
desired baud rate (4800 or 9600).

5 Press and release TEST button on

front of alarm panel. Front panel LED
indicators (Bit 1 and Bit 5) will show
current communication data format. If
only Bit 5 LED is illuminated, data
format is 8-bit word length (factory
setting). If BOTH Bit 1 and Bit 5 LEDs
are illuminated, data format is 16-bit
word length.

6. Using either ! or " buttons, select
desired data format (8-bit or 16-bit).

7. Press and release TEST button to
save changes. LEDs will sweep from
top to bottom to indicate end of set-up
sequence has been reached. Multi­signal module will return to monitoring
mode.

40

Part No. 6-847684-00 Rev. D01

Setting Audible Alarm Repeat Time and
Display Intensity:

Used to set time interval for reactivation

of audible alarm after alarm MUTE
button has been pressed.

1. Press and HOLD SETUP button.
Audible alarm will chirp when SETUP
button is first pushed, again after two
seconds and a third time after four
seconds. Release button after third
audible alarm chirp. Multi-signal
module front panel LED indicators will
show current audible alarm repeat
time as shown below:

Indicator Illuminated Repeat Time

None OFF
Signal 1 - red 1 Min.
Signal 2 - red 5 Min.
Signal 3 - red 15 Min.
Signal 4 - red 30 Min.
Signal 1 - green 1 Hr.
Signal 2 - green 2 Hr.
Signal 3 - green 8 Hr.
Signal 4 - green 12 Hr.
Signal 5 - green 24 Hr.

2. Using either ! or " buttons, select
desired audible alarm repeat time.

3 Press and release TEST button on

front of alarm panel. All LED
indicators will illuminate.

4. Select desired display brightness by
pressing either ! or " buttons. Each
push will increase or decrease
brightness of display. Audible alarm
will chirp one time with each button
push and two times when limit 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 Procedure

Monitoring Mode

Monitoring mode is the normal operating
mode of the MEGA2system.

Digital Display Module:

Digital display modules monitor pipeline
pressure or vacuum.

• The LED display indicates pipeline
pressure or vacuum.

• If piping pressure or vacuum level is
within high and low alarm limits, green
NORMAL indicator is illuminated.

• If pressure or vacuum level drops to,
or below, low alarm set-point, audible
alarm activates and red LOW indicator
flashes.

• If pressure or vacuum level rises to, or
above, high alarm set-point, audible
alarm activates and red HIGH
indicator flashes.

• When front panel alarm MUTE
button is pressed, audible alarm is
silenced. Alarm indicator remains
illuminated, but does not flash.

• Visual indicator will remain illuminated
as long as alarm condition remains.

• If audible alarm repeat time has been
set, audible alarm will reactivate, and
visual indicator will again flash after
specified time.

NOTE:

Sensor faults will be displayed as

-- FF 11 --, -- FF 22 --

,

-- FF 33 --

or

-- FF 44 --

error codes. Refer to trou-

bleshooting section for details.

Multi-Signal Module (Advanced)

41

Part No. 6-847684-00 Rev. D01

Operation

Multi-Signal Module:

Multi-Signal modules monitor up to five
dry-contact switches.

• If the signal is normal (switch contacts
closed), green indicator for signal is
illuminated.

• If an alarm occurs (switch contacts
open), audible alarm activates and red
indicator for signal flashes.

• When front panel alarm MUTE
button is pressed, audible alarm is
silenced. Alarm indicator remains
illuminated, but does not flash.

• Visual indicator will remain illuminated
as long as alarm condition remains.

• If audible alarm repeat time has been
set, audible alarm will reactivate, and
visual indicator will again flash after
specified time.

Monitoring Mode

SIGNAL 1

SIGNAL 2

SIGNAL 3

SIGNAL 4

SIGNAL 5

Testing

Digital Display Module:

Press and hold the front panel TEST but­ton for five seconds to initiate the following
sequence:

•

Audible alarm sounds briefly as

TT EE SS TT

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 illuminate
in sequence (firmware revision 1.0.4 and
later).

• Firmware revision (e.g.

11.. 00.. 66

) is displayed

for two seconds.

•

AA DD DD RR

is briefly displayed and then current
MEGA network module address is
displayed for two seconds. (Factory default

address is 00).

• Current units of measure setting (e.g.

PP SS II

)

is displayed for two seconds.

•

LL OO

is briefly displayed, LOW alarm indicator
is illuminated, and current low alarm set
point is displayed for two seconds.

•

KK ,,

is briefly displayed, HIGH alarm
indicator is illuminated, and current high
alarm set point is displayed for two
seconds.

• Module returns to monitoring mode.

Front panel

TEST button

Periodic testing of alarm system is
recommended. Digital display modules
and multi-signal alarm modules have built­in self-test modes. Front panel TEST
button will initiate self-test mode on all
alarm panel modules at same time.

42

Part No. 6-847684-00 Rev. D01

Testing

Multi-Signal Module:

Press and hold front panel TEST button for
five seconds to initiate following sequence:.

• Audible alarm sounds briefly.

• All red and green indictors flash for five
seconds.

• Software revision is displayed as
follows:

- Expressed as a three digit number

(e.g. 1.0.2).

- Each digit of number is displayed

separately for two seconds and
separated from the next digit by a
brief flashing of all indicators.

- Each number is displayed in a

binary code where each multi-signal
module indicator has a binary value.

- Example: Software revision 1.0.2

would be displayed as follows:

• First digit is determined by two
second illumination of top left
indicator (bit 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 second illumination of
second left indicator (bit 1 =
number 2).

• After all three digits of software revision
have been displayed, all indicators
illuminate for one second before
displaying current MEGA network
address.

• Current network address is displayed
for two seconds in a binary code where
each multi-signal module indicator has
a binary value.

• All indicators illuminate for one second
and module returns to monitoring
mode.

SIGNAL 1

SIGNAL 2

SIGNAL 3

SIGNAL 4

SIGNAL 5

Bit 4 (green)

Bit 0 (red)

Bit 1 (red)

Bit 2 (red)

Bit 3 (red)

Bit 5 (green)

Bit 6 (green)

Bit 7 (green)

Binary data represented by LED indicators

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

128 64 32 16 8 4 2 1

Numeric value of each bit

43

Part No. 6-847684-00 Rev. D01

Testing

Power Supply Assembly:

The power supply assembly converts AC
mains power to +5 and +24 volts DC. AC
mains power can be any value between
100 and 250 volts AC. In order to verify
power supply assembly is functioning
correctly, perform following procedure.

1. Loosen two front panel screws and
open alarm panel.

2. If no indicator lights or LED displays
are illuminated on front of alarm
panel, first verify internal fuse is
good (Figure 25). If fuse is good,
continue this procedure.

3. Using a digital volt meter, measure
DC voltage between black (-) and
orange (+) wires where power
supply harness plugs into
annunciator module (Figure 26).

When making measurements, do
not disconnect cable from
annunciator board. Insert meter

probes into back of white plastic
connector.

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 input
power as follows:

8. Remove four keps nuts and plastic
shield from power supply. Do not
disconnect wires from fuse holder or
harness from power supply.

9. Position plastic shield (wires
attached) so that power supply’s AC
input connector is accessible.

WARNING:

RISK OF ELECTRIC SHOCK !
USE EXTREME CAUTION -

The remainder of this procedure requires removal
of the clear plastic power supply shield. Even if
fuse is removed, the high voltage input wiring
remains energized.

10.Using a digital volt meter, measure
AC voltage between white (neutral)
and black (line) wires on back of
power supply connector (Figure 27).
Verify AC input voltage is 100 to 250
volts.

11. If AC input voltage is within
specification, replace power supply
assembly.

Figure 25: Alarm Panel Internal Fuse

Internal fuse holder

44

Part No. 6-847684-00 Rev. D01

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 Supply Assembly

Fuse

Holder

45

Part No. 6-847684-00 Rev. D01

Troubleshooting Guide

Symptom Possible Cause Corrective Action

a. AC power is not turned on.
b. Blown internal fuse.
c. AC power wiring is not

connected.

d. Three-wire power supply

harness is not connected
between power supply and
annunciator board

e. Faulty power supply

assembly.

a. Check AC power source.
b. Replace fuse.
c. Check AC entrance wiring at power

supply terminals. Verify two-pin
plastic connector is plugged into
power supply circuit board.

d. Check connections on each end

including orientation of cable
connectors. Reconnect if necessary.

e. Replace power supply assembly.

1) No visual indicators
illuminated on entire alarm
panel

a. 20-wire ribbon cable(s)

between annunciator module
and digital display or multi­signal modules not

connected.
b. Faulty 20-wire ribbon cable.
c. Faulty digital display or multi-

signal module.
d. Faulty annunciator module.

2) No visual indicators
illuminated on isolated
module(s). Green
annunciator module POWER
indicator is illuminated.

a. Reconnect ribbon cable(s).
b. All alarm panels 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 contains another

working digital display or multi-signal
module, unplug ribbon cable from
working module and connect to non­working module. If module does not
illuminate, replace faulty digital
display or multi-signal module.

d. Replace faulty annunciator module.

3) Constant audible alarm that
can not be silenced by
pressing front panel MUTE

button. No visual alarm
on any digital display or
multi-signal module.

a. Faulty digital display or multi-

signal module.
b. Faulty 20-wire ribbon cable.
c. Faulty annunciator module.

a. Disconnect digital display and/or

multi-signal modules one at a time
from 20-wire ribbon cables. If
disconnecting a module cancels
audible alarm, replace that faulty
module.

b. After all modules have been

disconnected from 20-wire ribbon
cables, disconnect each cable, one at
a time from annunciator module. If
disconnecting ribbon cable cancels
alarm, replace that faulty cable.

c. If both 20-wire ribbon cables have

been removed from annunciator
module, and audible alarm has not
cancelled, replace faulty annunciator
module.

46

Part No. 6-847684-00 Rev. D01

6) Audible alarm does not
sound when visual indicator
is illuminated. Pressing front

panel MUTE button
causes visual indicator to
stop flashing but remain
illuminated.

a. 20-wire ribbon cable not

connected well to
annunciator module or digital
display/multi-signal module

with visual alarm.
b. Faulty 20-wire ribbon cable.
c. Faulty annunciator module.
d. Faulty digital display or multi-

signal module.

a. Reconnect ribbon cable(s).
b. All alarm panels will incorporate two

20-wire ribbon cables. Exchange cable
connected to affected module with
other one (assuming all modules
connected to that cable are working
correctly). If problem follows cable,
replace cable.

c. Cause an alarm condition (by

unplugging field wiring connector) on
another module that is connected to
same 20-wire ribbon cable. Verify
audible alarm on this test module
activates. If audible alarm does not
activate, replace faulty annunciator
module.

d. If audible alarm on test module (step c)

activates, replace faulty digital display
or multi-signal module.

Troubleshooting Guide

Symptom Possible Cause Corrective Action

5) Flashing visual indicator and
audible alarm on digital
display or multi-signal
module that can not be
silenced by pressing front

panel 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. Faulty 20-wire ribbon cable.
c. Faulty annunciator module.
d. Faulty digital display or multi-

signal module.

a. Reconnect ribbon cable(s).
b. All alarm panels will incorporate two 20-

wire ribbon cables. Exchange cable
connected to affected module with other
one (assuming all modules connected
to that cable are working correctly). If
problem follows cable, replace cable.

c. Cause an alarm condition (by

unplugging field wiring connector) on
another module that is connected to
same 20-wire ribbon cable. Verify
visual indicators on this test module

stop flashing when MUTE button is
pressed. If visual indicators continue to
flash, replace faulty annunciator
module.

d. If visual indicators on test module (step

c) stop flashing when MUTE button
is pressed, replace faulty digital display
or multi-signal module.

4) Visual indicators are dimly
illuminated or vary in
brightness between one or
more digital display or multi­signal modules. Front panel
green POWER indicator is
illuminated brightly.

a. Programmable display

intensity levels have been
set too low or at different
values between modules.

b. Faulty digital display or multi-

signal module.

a. Reset display intensity values for

each module. Refer to Set-Up
instructions pages 35 - 40.

b. Replace faulty module.

47

Part No. 6-847684-00 Rev. D01

Troubleshooting Guide

Symptom Possible Cause Corrective Action

7) Audible alarm reactivates a
short period of time after

MUTE button has been
pressed.

a. A new alarm condition has

occurred.

b. Programmable alarm repeat

function has reactivated
audible alarm.

a. If alarm condition previously silenced

self-corrects and then reactivates
again, alarm panel treats as a new
alarm condition. Flashing visual
indicators represent new alarm
conditions. After being silenced,
visual indicators will stop flashing, but
remain illuminated.

b. Set alarm repeat value at desired

time interval. Refer to Set-Up
instructions pages 35 - 40.

8) Audible alarm activates when
it should, but sound level is
too low.

a. Audible alarm volume is set

too low.

b. Faulty annunciator module.

a. Adjust alarm volume potentiometer

located on annunciator module
clockwise to increase. Factory
default setting is max. clockwise
position (max. volume).

b. Replace faulty annunciator module.

10)Multi-signal alarm will not
activate 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 not
activate on one master
alarm when source contacts
open. Second master works
correctly.

a. Field wiring misconnection.
b. Faulty multi-signal module.

a. Correct field wiring. Verify multi-

signal module is connected to correct
source equipment switch.

b. Replace multi-signal module.

11) One or more multi-signal
alarms are in alarm
condition even though they
are not wired to source
equipment.

a. Field wiring misconnection.

a. Unused signals have not

been turned off.

a. Perform programming procedure in

order to turn off unused signals.
Refer to Set-Up instructions pages
35 through 40.

12)High or low pressure alarm
activated when digital dis­play indicates pressure or
vacuum is within normal lim­its.

a. Alarm set-points have been

changed.

b. Faulty digital display module.

a. Use digital display module test mode

as described on page 41 to check
current set-points. If incorrect,
reprogram low and/or high alarm set­pints. Refer to Set-Up instructions
pages 35 through 40.

b. Replace faulty digital display module.

48

Part No. 6-847684-00 Rev. D01

14)Low alarm with

-- FF II --

display

on digital display module.

No pressure or vacuum
signal to digital display
module as a result of:
a. Sensor wiring disconnected

or wiring polarity reversed.
b. Faulty digital display module.
c. Faulty sensor module.

a. Correct sensor wiring. If sensor is

mounted remotely, verify field wiring
continuity and polarity from sensor to
digital display module connector pins
5 (+) and 6 (-).

b. If alarm panel contains another

working digital display module,
remove field wiring connector from
suspect module and connect to
working (test) module. If test module

provides any reading other than

-- FF II --

, replace faulty digital display module.

c. If test module in step b above also

gives

-- FF II --

, replace faulty sensor

module.

15)Low alarm with

-- FF 22 --

display on digital display
module.

Pressure or vacuum signal
to digital display module out
of measurement range (too
low) as a result of:
a. No pressure or vacuum in

pipeline.
b. Faulty digital display module.
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 connect to
working (test) module. If test module
provides any reading other than

-- FF 22 --

, replace faulty digital display

module.

c. If test module in step b above also

gives

-- FF 22 --

, replace faulty sensor

module.

13)Pressure or vacuum digital
display does not match
pressure or vacuum levels
in pipeline.

a. Incorrect digital display “unit

of measure”.
b. Faulty digital display module.
c. Faulty sensor module.

a. Use digital display module test mode

as described on page 41 to check
current unit of measure (PSI, in Hg,
kPa, mm Hg). If incorrect, reprogram
unit of measure. Refer to Set-Up
instructions pages 35 through 40.

b. If alarm panel contains another

working digital display module,
remove field wiring connector from
suspect module and connect to
working (test) module. If test module
provides correct reading, replace
faulty digital display module.

c. If test module in step b above also

gives incorrect display, replace faulty
sensor module.

Troubleshooting Guide

Symptom Possible Cause Corrective Action

49

Part No. 6-847684-00 Rev. D01

Symptom Possible Cause Corrective Action

Troubleshooting Guide

16)High alarm with

-- FF 33 --

display on digital display
module.

Pressure or vacuum signal
to digital display module out
of measurement range (too
high) as a result of:
a. Shorted sensor wiring.
b. Faulty digital display module.
c. Faulty sensor module.

a. Correct sensor wiring.
b. If alarm panel contains another

working digital display module,
remove field wiring connector from
suspect module and connect to
working (test) module. If test module
provides any reading other than

-- FF 33 --

, replace faulty digital display

module.

c. If test module in step b above also

gives

-- FF 33 --

, replace faulty sensor

module.

17)High and low alarm with

-- FF 44 --

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 display module

programmed with the wrong
service.

a. Correct sensor wiring.
b. Program digital display module for

the correct gas/vacuum service.
Refer to Set-Up instructions page 36.

18)No blinking LED on digital
sensor module.

No power to digital sensor
due to:
a. Faulty wiring.
b. Faulty digital sensor module.

a. Correct sensor wiring.
b. Replace digital sensor module.

19)Fast blinking LED on digital
sensor module.

Sensor out of range:
a. Vacuum digital sensor

module connected to
pressure service.

b. Pressure digital sensor

module connected to
vacuum service.

c. Faulty digital sensor module.

a. Verify piping connections. Vacuum

sensor maximum overpressure: 30

psi.
b. Verify piping connections.
c. Replace digital sensor module.

50

Part No. 6-847684-00 Rev. D01

1

2

3

12

11

9

10

8

7

Replacement Parts

ITEM

PART

NUMBER DESCRIPTION

1 6-868163-00 20-wire Ribbon Cable (4-module alarm box)

- 6-868164-00 20-wire Ribbon Cable (8-module alarm box)

2 6-865315-00 Field Wiring Connector - Annunciator Module
3 6-231982-00 Circuit Board - Annunciator Module (includes item 2)

- 6-231982-RL Circuit Board - Annunciator Module with Auxiliary Relay
(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 x 1/4”, Flat Head
9 6-838982-00 Hinge
10 6-231980-00 Circuit Board - Digital Display Module (includes item 12)

- 6-231981-00 Circuit Board - Multi-Signal Module (includes item 12)

- 6-231981-RL Circuit Board - Multi-Signal Module with Relays (includes item 12)

11 6-811608-00 Screw - #6-32 x 1/4”, Pan Head
12 6-865316-00 Field Wiring Connector - Digital Display/Multi-Signal Module

4

6

5

Front Panel Components

51

Part No. 6-847684-00 Rev. D01

Replacement Parts

Back Box Components

4

5

6

7

8

9

10

11

12

13

14

15

16

18

17

1

ITEM PART NUMBER DESCRIPTION

1 6-814669-00 Screw - #6-20 x 1/4”, Pan Head, Self-Tapping
2 6-425458-00 Shield
3 6-814669-00 Screw - #6-20 x 1/4”, Pan Head, Self-Tapping
4 6-231938-00 Wire Harness - Power 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 Shield - Power Supply
11 6-865500-00 Fuse Holder
12 6-865546-00 Fuse - 1.0 Amp, 250VAC, Time Delay
13 Included In Item 11 Fuse Holder Cap
14 6-827530-00 Nut - #6-32, Keps
15 6-231936-00 Wire Harness - Power Supply DC Output
16 6-829628-00 Standoff
17 6-867540-00 Power Supply Assembly
18 6-831904-00 Spacer

3

2

52

Part No. 6-847684-00 Rev. D01

Replacement Parts

Sensor Components

Applicable to both local and

remote sensor mounting

Remote sensor mounting only

1

2

9

6

7

4

5

ITEM PART NUMBER DESCRIPTION

1 6-814669-00 Screw - #6-20 x 1/4”,

Pan Head, Self-Tap
2 6-425428-00 End Cap
3 Sensor Mounting Assy.

(incl. items 1,2,6,7& 9)

- 6-129340-10 Oxygen

- 6-129340-11 Nitrous Oxide

- 6-129340-12 Medical Air

- 6-129340-13 Vacuum

- 6-129340-14 Nitrogen

- 6-129340-16 Air (ISO)

- 6-129340-17 Vacuum (ISO)

- 6-129340-18 Instrument Air

- 6-129340-19 WAGD

- 6-129340-20 Carbon Dioxide

- 6-129340-21 CO2/O2

- 6-129340-22 O2/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

DESCRIPTION

4 6-231935-00 Sensor Pigtail
5 Analog Sensor

- 6-231760-00 Oxygen

- 6-231761-00 Nitrous Oxide

- 6-231762-00 Medical Air

- 6-231763-00 Vacuum

- 6-231764-00 Nitrogen

- 6-231765-00 Helium

- 6-231766-00 Lab Air

- 6-231767-00 Lab Vacuum

- 6-231768-00 Instrument Air

- 6-231769-00 WAGD

- 6-231770-00 Carbon Dioxide

- 6-231771-00 CO2/O2

- 6-231772-00 O2/CO2

- 6-231773-00 He/O2

- 6-231774-00 O2/He

- 6-231776-00 Air (ISO)

- 6-231777-00 Vacuum (ISO)

- 6-231778-00 Oxygen (100PSI)

- 6-231779-00 Air (100 PSI)

- 6-231780-00 CO2 (100 PSI)
6 6-814669-00 Screw - #6-20 x 1/4”,

Pan Head, Self-Tap

7 6-425555-00 Mounting Box

3

8

53

Part No. 6-847684-00 Rev. D01

ITEM PART NUMBER DESCRIPTION

8 Digital Sensor

- 6-232460-00 Oxygen

- 6-232461-00 Nitrous Oxide

- 6-232462-00 Medical Air

- 6-232463-00 Vacuum

- 6-232464-00 Nitrogen

- 6-232465-00 Helium

- 6-232466-00 Lab Air

- 6-232467-00 Lab Vacuum

- 6-232468-00 Instrument Air

- 6-232469-00 WAGD

- 6-232470-00 Carbon Dioxide

- 6-232471-00 CO2/O2

- 6-232472-00 O2/CO2

- 6-232473-00 He/O2

- 6-232474-00 O2/He

- 6-232476-00 Air (ISO)

- 6-232477-00 Vacuum (ISO)

- 6-232478-00 O2 (100 PSI)

- 6-232479-00 Air (100 PSI)

- 6-232480-00 CO2 (100 PSI)

9 Console Rough-In

- 6-233010-00 Oxygen
O2 (100 PSI)

- 6-233011-00 Nitrous Oxide

- 6-233012-00 Medical Air
Air (100 PSI)
Lab Air

- 6-233013-00 Vacuum
Lab Vacuum

- 6-233014-00 Nitrogen

- 6-233016-00 Air (ISO)

- 6-233017-00 Vacuum (ISO)

- 6-233018-00 Instrument Air

- 6-233019-00 WAGD

- 6-233020-00 Carbon Dioxide
CO2 (100 PSI)

- 6-233021-00 CO2/O2

- 6-233022-00 O2/CO2

- 6-233023-00 He/O2

- 6-233024-00 O2/He

Field Installation Kits

ITEM P

ART NUMBER DESCRIPTION

1 Digital Display Module

- 6-290980-10 Oxygen

- 6-290980-11 Nitrous Oxide

- 6-290980-12 Medical Air

- 6-290980-13 Vacuum

- 6-290980-14 Nitrogen

- 6-290980-16 Air (ISO)

- 6-290980-17 Vacuum (ISO)

- 6-290980-18 Instrument Air

- 6-290980-19 WAGD

- 6-290980-20 Carbon Dioxide

- 6-290980-21 CO2/O2

- 6-290980-22 O2/CO2

- 6-290980-23 He/O2

- 6-290980-24 O2/He

- 6-290980-25 Helium

- 6-290980-26 Lab Air

- 6-290980-27 Lab Vacuum

- 6-290980-28 O2 (100 PSI)

- 6-290980-29 Air (100 PSI)

- 6-290980-30 CO2 (100 PSI)

2 Multi-Signal Module

- 6-290981-00 W/O Relays

- 6-290981-RL W/ Relays

Field installation kits include everything required to
replace a blank module with a digital display mod­ule or a multi-signal module. Digital display module
kits include sensors.

NOTE:

Before ordering replacement sensor, determine
whether faulty sensor is analog or digital type by
part number listed on sensor label.

Faulty sensors must be replaced with same type.

54

Part No. 6-847684-00 Rev. D01

Notes

55

Part No. 6-847684-00 Rev. D01

Notes

BeaconMedæs warrants the MEGA2Medical

Electronic Gas Alarm to be free of defects in
materials or workmanship when installed and
operated in accordance with instructions. The
warranty period is 30 months from shipment date
or 24 months from startup, whichever period ter-
minates earlier.

This warranty covers all necessary parts and
labor required for correction of the defect whether
by any or all of repair, replacement, or credit,
which election shall be made by Beacon at it’s
sole discretion.

This warranty requires the owner to ensure
that the equipment is 1) started up or placed in
service by an authorized representative of
BeaconMedæs, 2) certified in accordance with
NFPA 99, most recent edition, by a properly quali-
fied certification agency, and 3) maintained in
strict accordance with Operation and Maintenance
Instructions provided with the product.

Warranty claims will be honored only after
examination by BeaconMedæs and only when
such examination shall disclose to
BeaconMedæs’ 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 temperature, pressure, humidity, or ven-
tilation), improperly or inadequately maintained,
field modified in any way, improperly repaired, or
in any other way improperly applied or used.

All claims against this warranty require prompt
notification, within the warranty period, of any
seeming defect. Failure to promptly notify
BeaconMedæs of the seeming defect will invali-
date all warranties.

This warranty excludes damage or defect
caused by shipping, acts of God, fire, war, labor
difficulties, action of government, or other cause
beyond the reasonable control of BeaconMedæs.

This warranty is given in lieu of all other war-
ranties, expressed or implied, including implied
warranties of fitness for a particular purpose and
merchantability. In no event shall BeaconMedæs
be liable for damages in excess of the value of
the defective product, nor shall BeaconMedæs be
liable for any direct, special or consequential
damages, loss of profit of any kind, or for loss of
use of the products.

Warranty