Q769C 0-2 to 10 Vdc Adjustable Adapter for M7405 and M7415 Actuators and W7459 Economizer INSTALLATION INSTRUCTIONS APPLICATION Installer Adjustment The Q769C 0-2 to 10 Vdc Adjustable Adapter is used to provide a 0-2 to 10 Vdc modulating signal to the M7405 and M7415 Actuators when used with a 0 to 10 Vdc or 2 to 10 Vdc controller. The Q769C can also be used with a C7150B Temperature Sensor instead of a Q709A to control the minimum position of an M7405 or M7415 Actuator. NOTE: The Q769C maximum power consumption is 0.45 VA and the housing is Underwriters Laboratories Inc. (UL) flame rated for 94 V-O. Two female quick connect terminals on the adapter connect to terminals P and P1 of the actuator. Two male quick connect terminals are available for field wiring an additional actuator. The adapter is designed to operate in a -40°F to +125°F (-40°C to +52°C) temperature range and a 5 to 95 percent relative humidity (RH) range. The Q769C calibration potentiometer can be installeradjusted for 0 to 10 Vdc signal by using the following procedure: 1 2 3 4 5 6 INSTALLATION When Installing this Product… 1. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition. 2. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application. 3. Installer must be a trained, experienced service technician. 4. After installation is complete, check out product operation as provided in these instructions. 7 8 The Q769C Adapter is delivered factory-set for 2 to 10 Vdc signal operation. Mount the Q769C Adapter on the M7405/M7415 Actuator; be sure + connects to P1 and - connects to P. Apply 24 Vac to actuator terminals TR and TR1. Connect a jumper wire between the plus (+) and minus (-) terminals of the Q769C Adapter. Turn the calibration potentiometer fully clockwise (cw) . Turn the calibration potentiometer counterclockwise (ccw) slowly until the actuator just begins to open. Turn the potentiometer cw slowly until the motor closes. Remove the jumper wire from the plus (+) and minus (-) terminals of the Q769C Adapter. Apply a position dc voltage source to the Q769C Adapter, then remove the source. Check the actuator position. If the actuator is not closed, turn the Q769C calibration potentiometer cw slowly until the actuator closes. CAUTION MIN POS P1 N Disconnect power supply before making wiring connections to prevent electrical shock and equipment damage. P All wiring must comply with applicable electrical codes, ordinances and regulations. The Q769C is supplied with female quick connect terminals that fit over 1/4 in. (6 mm) actuator male quick connect terminals P and P1. Plug the Q769C into the actuator terminals as shown in Fig. 1. See Fig. 2 for wiring information. ® U.S. Registered Trademark Copyright © 1997 Honeywell Inc. • All Rights Reserved 0-2V to 10 V PUSH Q769C ONTO ACTUATOR CALIBRATION POTENTIOMETER M7590A Fig. 1. Mounting Q769C 0-2 to 10 Vdc Adapter on actuator. X-XX UL 63-2463-1 Q769C 0-2 TO 10 VDC ADJUSTABLE ADAPTER FOR M7405 AND M7415 ACTUATORS AND W7459 ECONOMIZER 2 3 M7415 Connect the Q769C 0-2 to 10 Vdc Adapter to terminals P and P1. Reconnect 24 Vac to terminals TR and TR1 and adjust the input signal (0 to 10 Vdc or 2 to 10 Vdc) for the desired minimum position. The Q769C calibration potentiometer is factory adjusted so that the actuator begins to modulate open from the closed position at 2.4 Vdc for the 2 to 10 Vdc controller (0.4 Vdc for the 0 to 10 Vdc controller) with the calibration potentiometer set at the midrange position. As shipped from the factory, an M7405/M7415 Actuator begins to modulate closed from the fully open position at 9.8 Vdc. The exact voltage values depend primarily on the regulated dc voltage of the actuator. Calibration points are shown in Fig. 3. W7459A P1 P 10 V 9.4 V P P1 VOLTAGE (Vdc) to 1 0V 10 V 9.8 V 8V SET MINIMUM POSITION POTENTIOMETER TO FULLY OPEN WIRE Q769C TO ECONOMIZER 0-2V LEAVE OPEN CALIBRATION POTENTIOMETER 2-10 Vdc CONTROLLER 8V MODULATING RANGE 6V 6V 4V 4V 2.4 V 2V 2V LEAVE CLOSED M7589A 0.4 V 0V Fig. 2. Q769C Adapter connected to M7415 Actuator and W7459A Economizer for 0-2 to 10 Vdc control. FULLY CCW 0-10 V CAL POINT 2-10 V CAL POINT FULLY CW 0V M7591 Fig. 3. Calibration chart. ADJUSTMENT With the calibration potentiometer turned fully ccw or fully cw , the actuator leaves the closed or open positions at lower or higher voltages, respectively, than at the calibration points. With the calibration potentiometer in the fully counterclockwise position, the actuator leaves the closed position even without an input signal. Minimum Position Adjustment NOTE: When using the Q769 with the M7415, separate transformer must be used to power the M7415 and the controller. TR1, P1 and (+) on the Q769 are all internally connected. CHECKOUT The Q769C Adapter sets the minimum position of an M7405 or M7415 Actuator, based on a 0 to 10 Vdc or 2 to 10 Vdc signal. In an economizer system, the actuator adjusts outdoor air for cooling. The Q769C is used to set the minimum position so that a specified amount of fresh air is admitted. To adjust the Q769C on an M7405 or M7415 Actuator, proceed as follows: 1 Run the actuator to the fully closed position and disconnect 24 Vac from terminals TR and TR1. Check out the Q769C 0 to 10 Vdc or 2 to 10 Vdc Adapter according to the actuator instructions. If the Q769C does not meet the checkout guidelines of the actuator instructions, replace the adapter. By using this Honeywell literature, you agree that Honeywell will have no liability for any damages arising out of your use or modification to, the literature. You will defend and indemnify Honeywell, its affiliates and subsidiaries, from and against any liability, cost, or damages, including attorneys’ fees, arising out of, or resulting from, any modification to the literature by you. Home and Building Control Honeywell Inc. Honeywell Plaza P.O. Box 524 Minneapolis, MN 55408-0524 63-2463 63-2463—1 G.H. Rev. 1-97 Home and Building Control Honeywell Limited-Honeywell Limitée 155 Gordon Baker Road North York, Ontario M2H 2C9 Printed in U.S.A 2 Helping You Control Your World® Printed on recycled paper containing at least 10% post-consumer paper fibers.
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