Instruction/ maintenance manual of the product W7340 Honeywell
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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 .
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 .
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.
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.
W7340, W7345 COMMUNICATING ECONOMIZER LOGIC MODULES 5 63-2569—04 Fig. 4. Representative Locations of Connected W7340 Economizer Syste m Devices. Fig.
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.
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.
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.
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).
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.
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 .
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.
An important point after buying a device Honeywell W7340 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Honeywell W7340 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Honeywell W7340 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Honeywell W7340 you will learn all the available features of the product, as well as information on its operation. The information that you get Honeywell W7340 will certainly help you make a decision on the purchase.
If you already are a holder of Honeywell W7340, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Honeywell W7340.
However, one of the most important roles played by the user manual is to help in solving problems with Honeywell W7340. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Honeywell W7340 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
