Honeywell W7340 Product Data Download | Manualshive

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Automation and Control Solutions

Honeywell International Inc.

Honeywell Limited-Honeywell Limitée

1985 Douglas Drive North

35 Dynamic Drive

Golden Valley, MN 55422

Toronto, Ontario M1V 4Z9

customer.honeywell.com

W7340, W7345 COMMUNICATING ECONOMIZER LOGIC MODULES

® U.S. Registered Trademark
© 2007 Honeywell International Inc.
63-2569—04 J.I. Rev. 06-07

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Summary of Contents for W7340

Page 1: ...onal S963B1136 Remote Potentiometer for remote minimum damper position control Communicates using a modified Modbus protocol Case matches the lines of the M7215 Damper Motor LED indicates the status of the device input W7340 Only Operates from the Modbus input environmental sensors and a DCV sensor to provide a totally integrated control system Combines minimum damper position potentiometer with s...

Page 2: ...alpy or dry bulb curve setting 3 W7340C has the ability to set DCV minimum position and has the E curve setting Dimensions See Fig 1 Temperature Ratings Operating Ambient 40 to 149 F 40 to 65 C Shipping 25 to 125 F 32 to 52 C Humidity Ratings Noncondensing 5 to 95 RH Condensing 100 RH Inputs and Outputs See Table 1 Electrical Ratings Input Voltage 24 Vac 25 50 60 Hz Class 2 Nominal Power Consumpti...

Page 3: ...tected from rain snow and direct sunlight The logic module mounts on the side of an M7215 Damper Motor or directly on a sheet metal duct or panel NOTE Refer to Figures 4 and 5 for representative locations of connected system devices CAUTION Equipment Damage Hazard Mounting screws longer than 5 8 in can damage internal motor components When mounting the module to an M7215 use only the included 6 5 ...

Page 4: ...n the damper position on a call from the CO2 sensor DCV the damper can go 100 open W7340C The W7340C DCV economizer logic module has the ability to set DCV minimum damper position and minimum position The DCV minimum position is set to ventilate the building contaminants and the minimum position is set to ventilate for the building contaminants and the building occupants The installer sets the dam...

Page 5: ...NTIAL ENTHALPY CONTROL PROVIDES GREATER ENERGY SAVINGS THAN SINGLE ENTHALPY CONTROL USE EITHER MIXED AIR SENSOR OR DISCHARGE AIR SENSOR NOT BOTH A C7600 HUMIDITY SENSOR USED IN CONJUNCTION WITH A 10K NTC TEMPERATURE SENSOR CAN BE USED INSTEAD OF A C7400 ENTHALPY SENSOR FOR DRY BULB CONTROL USE ONLY A 10K NTC TEMPERATURE SENSOR M22814 INDOOR AIR CO2 SENSOR MODBUS EXHAUST AIR DISCHARGE AIR INDOOR FA...

Page 6: ... dc common connections Fig 6 W7340 Typical Wiring P1 TR1 TR1 24 VAC TR TR P EXF M23875 PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED OPTIONAL REMOTE MINIMUM POSITION POTENTIOMETER WHEN USING C7400 ENTHALPY SENSORS CONNECT THE ENTHALPY SENSOR TO THE HUMIDITY SENSOR TERMINALS LEAVE THE TEMPERATURE SENSOR TERMINALS EMPTY 1 2 3 3 3 3 3 2 R B W CCW OPEN MOD BUS CW CLOSE S963B M7215 W7340...

Page 7: ...ing heating It holds the outdoor air damper at the minimum position setting The W7340 operates as a basic free cooling controller Table 2 details the input output I O logic of the W7340 The logic module energizes the Unit Control and Indoor Fan contacts and operates according to Table 2 SETTINGS AND ADJUSTMENT W7345 Potentiometers with screwdriver adjustment slots located on the face of the device...

Page 8: ...modulating between DCV minimum position and 100 open d Modulation based on DCV signal limited by minimum position e Modulation based on the greater of the DCV and mixed air sensor signals Adjusting Minimum Damper Position The minimum position potentiometer maintains the minimum outdoor air flow into the building during occupied period NOTE If the mixed air temperature drops to 45 F 7 C the mixed a...

Page 9: ...e sensors and two C7600C Humidity Sensors connected to one logic module With outdoor and return air sensors the logic module compares outdoor air to return air instead of to a setpoint as it does for single enthalpy The logic module selects the lower enthalpy air return or outdoor for cooling for example when outdoor air has lower enthalpy than return air the outdoor air damper opens to bring in o...

Page 10: ...6 3 8 4 0 4 2 4 4 4 6 9 0 1 0 0 8 0 7 0 6 0 5 0 4 0 3 0 20 10 E N T H A L P Y B T U P E R P O U N D D R Y A I R 85 29 90 32 95 35 100 38 105 41 110 43 35 2 35 2 40 4 40 4 105 41 110 43 45 7 45 7 50 10 50 10 55 13 55 13 60 16 60 16 65 18 65 18 70 21 70 21 75 24 75 24 80 27 80 27 85 29 90 32 95 35 100 38 APPROXIMATE DRY BULB TEMPERATURE F C A A B B C C D D M23879 R E L A T I V E H U M I D I T Y 1 1 ...

Page 11: ...ia Modbus function code 8 no flash priority needed NOTES All pulse counts Table 4 are based on the number of times the light pulses off In the event of a Communications Failure the LED pulses on for 0 25 seconds every 2 seconds Table 4 W7340 Economizer Checkout Description Pulse count Diagnostic bit Booting 0 3 min after power up NA 12 Mixed air temperature sensor fault 8 7 Outdoor air temperature...

Page 12: ... Limited Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley MN 55422 Toronto Ontario M1V 4Z9 customer honeywell com W7340 W7345 COMMUNICATING ECONOMIZER LOGIC MODULES U S Registered Trademark 2007 Honeywell International Inc 63 2569 04 J I Rev 06 07 ...

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