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Modutrol Motor M7484A
The M7484A is a low voltage, reversing pro-
portional modutrol motor used to drive a fuel
valve and combustion air damper as commanded
by the BCS 7700.
Electronic, vibration resistant drive circuit.
Requires 24 Vac power supply.
Die-cast aluminum case.
Feedback potentiometer circuit provides position
indication input to the BCS 7700.
Motor stroke is fixed 90˚, 30 second timing.
Low and High Fire position proving feedback
potentiometer circuit.
150 lb.-in. torque.
Accessories include weather proofing kit.
CONTENTS
Specifications ................................................ 2
Ordering Information .................................... 2
Installation .................................................... 4
Operation and Checkout ............................... 6
T.M. • Rev. 7-92 • © Honeywell Inc. 1992 • Form Number 63-2273-1
BCS 7700
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Summary of Contents for Honeywell BCS 7700 Series
- Page 1 Accessories include weather proofing kit. indication input to the BCS 7700. CONTENTS Specifications ..........2 Ordering Information ........2 Installation ............ 4 Operation and Checkout ....... 6 T.M. • Rev. 7-92 • © Honeywell Inc. 1992 • Form Number 63-2273—1...
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Page 2: Specifications
If you have additional questions, need further information, or would like to comment on our products or services, please write or phone: 1. Your local Honeywell Home and Building Control Sales Office (check white pages of your phone directory). 2. Home and Building Control Customer Satisfaction Honeywell Inc., 1885 Douglas Drive North... - Page 3 M7484A SPECIFICATIONS Fig. 1—M7484A dimensions in in. [mm]. 4.88 124] [140] [13] [20] [24] 4.06 [103] 1.47 [37] 1.5 [38] 2.4 [61] WIRING .76 [19] BASE 6.45 MOTOR [164] POWER AUXILARY 5.39 [137] 1.75 2.59 [44] [66] 1.25 [32] .60 [15] 2.50 [64] 7.3 [185] ADAPTER...
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Page 4: Installation
M7484A INSTALLATION Installation INSTALLING LINKAGES A crank arm is not included with the motor. WHEN INSTALLING THIS PRODUCT… In general, check the following points of operation 1. Read these instructions carefully. Failure to follow when installing a motor and linkage: them could damage the product or cause a hazardous 1. - Page 5 M7484A INSTALLATION Fig. 3—BCS 7700 internal block wiring diagram. EARTH GROUND (HOT) OIL SELECT 120 VAC GAS SELECT 11K1 OIL LINE PURGE VALVE ATOMIZING AIR ALARM COMPRESSOR SIGNAL MOTOR STARTER WATER TEMP. 10K1 SENSOR / CON- DIGITAL COMMON FIG. ANALOG MONITOR OPTOISOLATOR TEMPERATURE...
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Page 6: Operation And Checkout
Keyboard and Display Module, to assure proper operation of the feedback potentiometer circuit. Home and Building Control Home and Building Control Helping You Control Your World Honeywell Inc. Honeywell Limited—Honeywell Limitée 1985 Douglas Drive North 740 Ellesmere Road Golden Valley, Minnesota 55422 Scarborough, Ontario QUALITY IS M1P 2V9 Printed in U.S.A.