Lift-Master
The Professional Line
OWNERS MANUAL
The Chamberlain Group, Inc.
A Unit of Duchossois Industries, Inc.
845 Larch Avenue, Elmhurst, Illinois 60126
MODEL BTL
BELT TROLLEY LIMITED
SERIES B
WIRING
TYPE
MASTER WIRING DIAGRAM
WIRING TYPES
B MOMENTARY CONTACT TO OPEN, CLOSE, AND STOP WITH OPEN
OVERRIDE.
“l” B2 ADDS THE WIRING FOR SENSING DEVICES TO REVERSE, RESIDENTIAL
RADIO CONTROLS AND AUXILIARY DEVICES TO OPEN AND CLOSE TO “B”
WIRING.
114A1041 12 Printed In Mexico
ITEM PT. NO. DESCRIPTION QUANTITY
A 451913 Frame, BTL 1
B 454203 Motor Assembly 1
C 452003 Nut, Hex 8-32 6
D 230615 Washer, External Tooth No. 8 5
E 570502 Brushing, 1/2” Hole 1
F 451105 Pulley, Motor - 1/2” Bore 1
G 452030 Set screw, 1/4-20x1/4” 2
H 453215 Transformer Assy. LIMITED 1
I 452033 Screw, Sht. Metal No. 6x3/8 Type A 14
J 453028 Marker, 7 terminal 1
K 452105 Screw, Mach. 8-32x1/2” Rd. Hd. 2
L 452026 Washer, Split lock No.8 2
M 453030 Marker, 3 terminal 1
N 230213 Screw Mach. 10-32x3/4 Rd. Hd. 2
O 230614 Washer, Split lock No. 10 2
P 230317 Nut, Hex 10-32 2
Q 452078 Screw, Ground 1
R 452957 Clutch Shaft Assembly 1
S 452219 Bushing, 3/4” Keyed Flange 4
T 450572 Sprocket, 43-B-10x3/4” 3
U 450421 Key, Woodruff - 3/16” 2
V 450420 Key, 3/16”x1-1/4” 1
W 453105 Collar, Shaft - 3/4” 2
X 452032 Set Screw 5/16”-18x1/4” 9
Y 451415 V-Belt, 4L-31 1
Z 450922 Slide, Trolley 1
AA *** Angle Track 2
BB 233018 Bolt, Spade 3/8-16x15/16” 1
CC 453824 Bracket, Chain Adjustment 1
DD 450168 Shaft, Output 1
**EE 452988 Assy, Idler Shaft 1
FF 453823 Bracket, Wall 1
GG 453822 Spacer, Track Varies
* INDICATES ITEM IS BIT SHOWN ON DRAWING.
SEE INSTALLATION PORTION FOR THESE ITEMS.
** INDICATES ITEMS TO BE ORDERED AS
ASSEMBLIES ONLY
*** SEE CHART ‘A’ AS PARTS NUMBERS VARY BY
TRACK ANGLE LENGTH
ITEM PT. NO. DESCRIPTION QUANTITY
HH *** Chain, Roller No. 48 1
II 230601 Washer, Lock - 3/8” Varies
JJ 451866 Chain, 35P, No. 48 1
KK 230702 Screw, cap 3/8-16x3/4” Hex Hd. Varies
LL 450591 Sprocket, 43-B-20 1
MM 453116 Bracket, Mounting-Capacitor 2
NN 451272` Cover, Limited Elec. Box 1
OO 230301 Nut, Nex 3/8-16 Varies
PP 453036 Capacitor 130-154 MFD, 220 VAC 2
*QQ 451514 Arm, Curved 1
*RR 450829 Bracket, Door 1
*SS 453405 Assy. Release Arm 1
*TT 230730 Bolt, Hex Hd. 5/16-18x1-1/2” 1
*UU 452076 Nut, Lock-Hex 5/16-18 1
*VV 452065 Bolt, Hex Head 5/16-18x1” 3
*WW 230302 Nut, Hex 5/16-18 4
*XX 230604 Washer Locj 5/16” 2
YY 451855 Chain, 43P No. 48 1
ZZ 451850 Master Link, No. 48 2
CHART A
TRACK
LENGTH
11’ 453840 350112
13’ 453841 350113
15’ 453842 350113
17’ 453843 350115
19’ 453844 350116
21’ 453845 350117
23’ 453846 350118
25’ 453847 451847
27’ 453848 451848
TRACK
PART NO.
#48 CHAIN
PART NO.
ITEM PT. NO. DESCRIPTION QTY
1 453239 Relay, 3 PDT 24 VAC 2
2 203B0180 Terminal Strip, 7 Lug 1
3 203B0177 Terminal Strip, 3 Lug 1
4 450230 Limit Switch 4
5 093D0117-1 Box, Limited Electric 1
6 450349 Retaining Ring 1
7 450350 Bearing, Flange 2
8 450587 Nut, Limit-Plastic 1/2-20 2
9 450178 Shaft, Limit Ltd. 1
10 450348 Sprocket, Limit Switch 1
11 171A0338 Set Screw, #10-32x1/4” 1
12 171A0336 Screw, Hex Hd. Mach. #4-40x5/16” 8
13 230612 Lockwasher #4 Internal Tooth 16
14 450347 Spacer, Limit Switch 8
15 171A0335 Screw, Hex Hd. Mach. #4-40x5/8” 8
16 171A0275 Screw, Hex Hd. Mach. #8-32x3/4” 2
17 450351 Retainer, Travel Nut Ltd. 1
18 177A0113 Spring, Compression 2
19 452077 Nut, Lock #8-32 2
20 171A0386 Screw Hex Hd. Mach. #6-32x1/2” 2
21 230616 Washer #6 Split Lock 2
22 186B0047 Barrier 7 Lug Term. Strip 1
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