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Honeywell W7340 manual

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Table of contents for the manual

  • Page 1

    PRODUCT DATA 63-2569—04 W7340, W7345 Communicating Economizer Logic Modules FOR VENTILATION CONTROL APPLICA TION The W7340 Communicating Eco nomizer Logic Module is a full featured economizer that incorporates Demand Control V entilation (DCV) to pr ovide free cooling a nd ventilation fo r occupants in a sp ace while saving energy . The W7345 C o[...]

  • Page 2

    W7340, W7345 COMMUNICATING ECONOMIZER LOGIC MODULES 63-2569—04 2 ORDERING INFORMATION When purchasing replacement and modern ization produ cts from your TRADELINE ® wholesaler or distributor, re fer to the TRADELINE ® Catalog or price sheets for co mplete ordering number . If you have additional questions, need further information, or w ould li[...]

  • Page 3

    W7340, W7345 COMMUNICATING ECONOMIZER LOGIC MODULES 3 63-2569—04 T able 1. Logic Modu le Inputs and Outputs. a 2-wire (18, 20, 22 A W G) connection. INST ALLA TION When Installing this Product... 1. Read these instructions carefully . Failure to follow them could damage the product o r cause a hazardous condition. 2. Check the ratings given in th[...]

  • Page 4

    W7340, W7345 COMMUNICATING ECONOMIZER LOGIC MODULES 63-2569—04 4 Fig. 3. Mounting to a Duct or Pa nel. Enthalpy Sensor (W7340 only) T o me asure enthalpy , the logic module accepts signals from either: — C7600C Humidity and 10K NTC temperature sensors. — or a C7400 Enthalpy Sensor . IMPORTANT • When using C7400 Enthalpy Sensors, connect the[...]

  • Page 5

    W7340, W7345 COMMUNICATING ECONOMIZER LOGIC MODULES 5 63-2569—04 Fig. 4. Representative Locations of Connected W7340 Economizer Syste m Devices. Fig. 5. Representative Locations of Connected W7345 Economizer Syste m Devices. 10K NTC DISCHARGE AIR SENSOR DIRECT EXP ANSION COIL C7400 C7232 ENTHALPY SENSOR C7400 ENTHALPY SENSOR RETURN AIR OUTDOOR AI[...]

  • Page 6

    W7340, W7345 COMMUNICATING ECONOMIZER LOGIC MODULES 63-2569—04 6 WIRING CAUTION Electrical Shock or Equipment Dama ge Hazard. Can shock individuals or short equ ipment circuitry . Disconnect power supply before installation. IMPORTANT 1. All wiring must comply with applicable local code s, ordinances and regulations. 2. Refer to Figures 6 and 7 f[...]

  • Page 7

    W7340, W7345 COMMUNICATING ECONOMIZER LOGIC MODULES 7 63-2569—04 Fig. 7. W7345 T ypical Wi ring. OPERA TION The purpose of the economizer logic modules are to use outdoor air for cooling, whenever possible, to reduce compressor operation. IMPORT ANT • Use C7400A sensor with W7340A or W7340B. • Use C7400C with W7340C. The W7340, when wired as [...]

  • Page 8

    W7340, W7345 COMMUNICATING ECONOMIZER LOGIC MODULES 63-2569—04 8 W7340 Potentiometers with screwdriver adjustment slots, located on the face of the device, provi de adjustments for several parameters (See Fig. 9 for locations on device): — DCV minimum and minimum damper position. — Enthalpy changeover . — DCV setpoint. Fig. 9. Loca tion of [...]

  • Page 9

    W7340, W7345 COMMUNICATING ECONOMIZER LOGIC MODULES 9 63-2569—04 Limit On Minimum Damper Position On the W7340A a nd B models, the logic module as shipp ed from the factory , limits the minimu m position setpoint to 50%. The logic module will not allow a minimum position greater than 50% open (from fully closed). NOTE: This setpoint limit can onl[...]

  • Page 10

    W7340, W7345 COMMUNICATING ECONOMIZER LOGIC MODULES 63-2569—04 1 0 Fig. 10. W7340 Performance Characterist ics for Enthalpy C hangeover Settings. T able 3. W7345 Performance Characteristics for T emperature Changeover Settings. CONTROL CURVE A B C D E CONTROL POINT APPROX. °F (°C) A T 50% RH 73 (23) 70 (21) 67 (19) 63 (17) 55 (13) 12 14 16 18 2[...]

  • Page 11

    W7340, W7345 COMMUNICATING ECONOMIZER LOGIC MODULES 11 63-2569—04 TROUBLESHOOTING The status LED is visible through a hole in the device cover . A priority-based LED fl ash sequenc e indicates a detected fault. 0.25 seconds elapses between each pulse, a higher pulse count indicates higher priority . A two-second on period precedes each repeated s[...]

  • Page 12

    Automation and Co ntrol Solutions Honeywell Internation al Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Dri ve North 35 Dynamic Drive Golden Valley, MN 55422 Toronto, Ontario M1V 4Z9 customer.honeywell.com W7340, W7345 COMMUNICATING ECONOMIZER LOGIC MODULES ® U.S. Registered T rademark © 2007 Honeywell International I nc. 63-2569—04 J[...]