Explosion-Proof Motor andExplosion-Proof Electrical Enclosure with
Intrinsically Safe Control Wiring
SUITABLE FORMODEL GJX, 1/2 AND 1 HP CLASS I, DIVISION 1, GROUP DMODEL GTX, 1/2 AND 1 HP CLASS II, DIVISION 1, GROUPS E, F AND GMODEL GJX, 2 HP CLASS I, DIVISION 1, GROUP D
ADDENDUMRefer to Model GJ or GTInstallation Instructions
Serial # __________________________________(located on electrical box cover and limit switch cover)
Date of Installation ________________________
Wiring Type ______________________________ Approved
IMPORTANT NOTESPLEASE READ THE ENTIRE PAGE BEFORE PROCEEDING
Make sure the serial number on the operatorlimit switch cover matches the serial numberon the electrical enclosure cover.
Verify that the classification of the hazardousatmosphere for this installation does notexceed the operator rating. Refer to themanual cover for the model rating; see page3 for examples of hazardous atmospheres.
DO NOT CONNECT ANY POWERED SWITCHINGDEVICE TO INTRINSICALLY SAFE CONTROLWIRES. EXAMPLES WOULD BE RADIOCONTROL RECEIVERS, PHOTOCELLS, ETC.,EVEN IF THESE DEVICES ARE LOCATEDWITHIN AN EXPLOSION-PROOF ENCLOSUREOR IN A NON-HAZARDOUS AREA. CONNEC-TIONS OF THIS TYPE VOID THE INTRINSICALLYSAFE RATING AND COULD CAUSE DAMAGE TOTHE INTRINSICALLY SAFE LATCHING RELAYS.
A PROPERLY GROUNDED CONNECTION TO THEEXPLOSION-PROOF ENCLOSURE IS REQUIRED.A GROUNDING LUG IS PROVIDED NEXT TO THE3-LUG POWER TERMINAL STRIP. FAILURE TOCOMPLY WITH THESE SAFETY INSTRUCTIONSMAY RESULT IN SERIOUS PERSONAL INJURYOR DEATH FROM AN EXPLOSION.
Verify that the power available matches therating marked on the operator nameplate.
Contact your local authorized Lift-Masterdealer for repair service of motor and intrinsi-cally safe control panel. The servicing of themotor and the intrinsically safe control panelby an unauthorized individual will void theexplosion-proof and intrinsically safe rating.
ALL HIGH VOLTAGE WIRING FROM THE POWERSOURCE TO THE ELECTRICAL ENCLOSUREAND FROM THE ELECTRICAL ENCLOSURE TOTHE MOTOR MUST BE IN RIGID CONDUIT, ANDMUST BE INSTALLED IN ACCORDANCE WITHTHE CURRENT NATIONAL ELECTRICAL CODE,ARTICLES 500 THROUGH 516 AND/OR LOCALREQUIREMENTS FOR WIRING IN HAZARDOUSLOCATIONS. FAILURE TO COMPLY WITH THESESAFETY INSTRUCTIONS MAY RESULT INSERIOUS PERSONAL INJURY OR DEATH FROMAN EXPLOSION.
SEPARATE ALL HIGH VOLTAGE WIRING FROMINTRINSICALLY SAFE WIRING BY A MINIMUMOF TWO INCHES. FAILURE TO COMPLY WITHTHESE SAFETY INSTRUCTIONS MAY RESULT INSERIOUS PERSONAL INJURY OR DEATH FROMAN EXPLOSION.
FEATURES OF YOUR OPERATOR1. INTRINSICALLY SAFE CONTROL WIRING
The intrinsically safe barrier relays used in this operator are designed to limit energy levelsto less than would be sufficient to cause ignition of a hazardous atmospheric mixture in itsmost volatile state.
2. DELAY ON REVERSE/DYNAMIC BRAKE CONTROL BOARDThe delay on reverse feature works in conjunction with the dynamic brake. When AC powerto the motor is interrupted, the delay on reverse prevents restarting of the motor forapproximately two seconds. During the two second period, the dynamic brake applies a DCvoltage to the motor winding, setting up a magnetic field to stop the motor. The two seconddelay does not occur when the operator is started from an at rest condition.
2
CAUTION DANGER
DANGER DANGER
CLASSIFICATION OF HAZARDOUS ATMOSPHERESClass Division Group Typical atmosphere/ignition temps.
I 1 A acetylene (305C. 581F)Gases, Normallyvapors hazardous B butadiene1 (420C. 788F)
ethylene oxide2 (429C. 804F)hydrogen (520C. 968F)manufactured gases containing more than 30% hydrogen(by volume)Propylene oxide2 (449C. 840F)
2 A Same as Division 1Not B Same as Division 1normally C Same as Division 1hazardous D Same as Division 1
II 1 E Atmospheres containing combustibleCombustible Normally metal dusts regardless of resistivity, ordusts hazardous other combustible dusts of similarly hazardous
characteristics having resistivity of less than 105 ohm-centimeter
F Atmospheres containing carbonaceous dusts havingresistivity between 102 and 108 ohm-centimeter
G Atmospheres containing combustible dusts havingresistivity of 105 ohm-centimeter or greater
2 F Atmospheres containing carbonaceousNot normally dusts having resistivity of 105
hazardous ohm-centimeter or greaterG Same as Division 1
III 1 & 2Easily ignitiblefibers andflyings
3
WIRINGThe operator has been factory wired forType B2 as standard (momentary contactto open, close and stop).
Diagrams to convert the operator to TypeC2 are included (momentary contact toopen and stop, with constant pressure toclose).
INSTALLATION1. Install the operator motor and frame
assembly according to the Owner'sManual for your model operator, (eitherGT or GJ).
2. Securely attach the electrical enclosureto the wall, adjacent to and within sightof the door and operator. See Figure 1.
CONNECT HIGH VOLTAGEAll high voltage wiring to the explosion-proof electrical enclosure and from the electricalenclosure to the motor:
1. Must be contained in rigid conduit.
2. Must be installed in accordance with the current National Electrical Code, articles 500through 516 and/or local requirements for wiring in hazardous locations. See Figure 1.
Refer to proper schematic, wiring diagram and motor wiring for your type wiring, voltage andphase - Pages 10 through 20.
CONNECT INTRINSICALLY SAFE WIRINGTO LIMIT SWITCHES AND CONTROLSince this wiring is intrinsically safe, the factory installed junction box and associated conduitruns do not have to conform to hazardous wiring codes. NEMA I enclosures may be usedwithout the risk of creating a hazard. Check for local codes and requirements.
Connect wires from factory installed junction box to control station, limit switch terminal strip,and safety edge switch if used. Also refer to Figures 1, 2A, and 2B, and also to control andlimit switch connection diagrams for your type wiring, - pages 8 and 9.Wires in junction box are color coded and numbered. These numbers correspond to the ter-minal strip numbers in the limit switch enclosure.
When wiring is complete, install electrical enclosure cover using the hex head screwsprovided. Make sure that the cover flange and the enclosure flange have been wiped clean.
NEVER OPERATE THIS EQUIPMENT IN ANEXPLOSIVE ATMOSPHERE WITH THE COVERREMOVED. FAILURE TO COMPLY WITH THESESAFETY INSTRUCTIONS MAY RESULT INSERIOUS PERSONAL INJURY OR DEATHFROM AN EXPLOSION.
TO CONDUCT CONTINUITY CHECKS OF THEINTRINSICALLY SAFE FIELD WIRING, DISCON-NECT FACTORY WIRING IN THE FACTORYINSTALLED JUNCTION BOX. EXTERNALLYAPPLIED VOLTAGE OF THE CONTINUITYTESTER COULD DAMAGE THE BARRIER ANDREQUIRE REPLACEMENT.
4
CAUTIONDANGER
Lim
it S
witc
hE
nclo
sure
Exp
losi
on P
roof
Mot
or
Junc
tion
Box
(As
Req
uire
d)
Con
trol
Sta
tion
Ele
ctric
alE
nclo
sure
SE
E
NO
TE
7
Coi
l Cor
d or
Tak
e-U
p R
eel
(Opt
iona
l)
Saf
ety
Sw
itch
(Opt
iona
l)
1
3
2
14
55
HA
ZA
RD
OU
S L
OC
AT
ION
C
LA
SS
I, II
, DIV
ISIO
N 1
G
RO
UP
D, E
, F &
G
NO
N -
H
AZ
AR
DO
US
L
OC
AT
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1
2 3 4 5 6. 7. 8. 9.
NO
N-E
NE
RG
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TO
RIN
G D
EV
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S S
UC
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IMIT
SW
ITC
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SS
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NT
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Y IN
ST
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WIT
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LLY
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ING
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R C
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TO
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ND
LIM
IT S
WIT
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AS
CLA
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I, D
IV. 1
, GR
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II, D
IV. 1
, GR
OU
PS
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& G
.
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ST
ALL
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IRE
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US
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E IN
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WIT
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MO
DE
L G
JX, 1
/2 &
1 H
P
MO
DE
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TX
, 1/2
& 1
HP
MO
DE
L G
JX, 2
HP
CL
AS
S I,
DIV
ISIO
N 1
, GR
OU
P D
CL
AS
S II
, DIV
ISIO
N 1
, GR
OU
PS
E, F
& G
CL
AS
S I,
DIV
ISIO
N 1
, GR
OU
P D
CL
AS
S II
, DIV
ISIO
N 1
, GR
OU
PS
E &
F
SU
ITA
BL
E F
OR
1
5
OPEN CLOSE
Conduit Entrance
Close Limit Switch
Wire Clamp
7-Lug Terminal
FIGURE 2A GJX Limit Switch Enclosure
Wire Clamp
Limit Switch Assembly
Wire Clamp
Open Limit Switch
Sensing Limit Switch
6
7
OPEN CLOSE Wire Clamp
Open Limit Switch
7-Lug Terminal
FIGURE 2B GTX Limit Switch Enclosure
Wire Clamp
Limit Switch Assembly
Conduit Entrance
Wire Clamp
Close Limit Switch
Sensing Limit Switch
8
7 6 5 4 3 2 1
JUNC. BOX JUNCTION BOX
BROWN
RED
YELLOW
BLUE
VIOLET
BLACK1
BRN
RED
ORGYEL
VIO
DENOTES WIRE NUT
BLUE
SEAL FAST
FITTING
BLACK
BRN
OPEN
CLOSE
STOPORG
I.S. ELECTRICAL
BOX
BLACK
RED
V I O
Y E L
O R G
R E D
B R N
B L K
LIMIT SWITCH ASSY. TERMINAL STRIP
SENSING EDGE
CONTROL STATION
2
3
4
5
7
2
3
5
8
8
1
2
4
CONTROL AND LIMIT SWITCH WIRING DIAGRAM (B2 - WIRING)
P-
8
7
1
6
9
7 6 5 4 3 2 1
JUNC. BOX JUNCTION BOX
BROWN
RED
YELLOW
BLUE
VIOLET
BLACK1
BRN
RED
ORGYELVIO
DENOTES WIRE NUT
BLUE
SEAL FAST
FITTING
BLACK
BRN
VIO
OPEN
CLOSE
STOPORG
I.S. ELECTRICAL
BOX
BLACK
RED
V I O
Y E L
O R G
R E D
B R N
B L K
LIMIT SWITCH ASSY. TERMINAL STRIP
SENSING EDGE
CONTROL STATION
2
3
4
5
7
2
3
5
8
8
1
2
7
4
(Close Button is NOT
Connected to Common on
Control Station)
CONTROL AND LIMIT SWITCH WIRING DIAGRAM (C2 - WIRING)
P-
1
6
G
RH
H
L
RL
G
1
2
3
4
5
6
G
RH
H
L
RL
G
1
2
3
4
5
6
B l a c k
Blue
A1
T1 T2
L3 NO L1 L2 L3 NO
A2
NO NC NCNCNO NC NCNC
T3
L1 L2
NC
NO NC NCNCNO NC NCNC
T1 T2 T3
A2A1
OPEN
CLOSE
STOP
4 3 2567 1
OLSNO
NCINTERLOCK SWITCH
NO
C
C
Red
VioletYellow
OrangeRed
Brown
Orange
Yellow
NCCLS
NO C
NCSLS
NO C
LIMIT SWITCH ASSEMBLY
Black
Black
Brown
V Red
Black
SENSING EDGE
Yellow
White
RedGray
Black
MOTOR
Black BrownViolet
Red
Black
Gray
Blue
Orange
Brown
L1 L2 L3
CLOSE OPEN
BrownViolet
Orange
Violet
Blue
Gray
Red
BrownWhite
Yellow
Black
Blue
Red
BrownYellow
V
VG
W
W
Black
Violet
1 2 3 4 5 6 7 8 9 10 11 12 13 14
P2
Orange
1 2 3 4
GrayRed
Black
P1
CONTROL TRANSFORMER
Black
L O A D
Violet
L I N E
L O A D
L I N E
Yellow
White
R e d
DYNAMIC BRAKE
TRANSFORMER
NONO
The Chamberlain Group, Inc. ISO 1Ø B2 Wiring Diagram 2/27/92 - 3/9/92 - 3/22/92 4/13/92 - 5/15/92 - 1/9/93
