DescriptionBypass Rating(cfm)40 VA transformers AT140A1042 Capacity protectorC7835A1009 Round static pressure regulator damperSPRD7SPRD8SPRD9 SPRD10SPRD12SPRD14SPRD16 300 400 600 750 1200 1800 2400 Rectangular static pressure regulator damperSPRD12x8SPRD12x10SPRD12x12SPRD20x8SPRD20x10SPRD20x121000 1200 1400 1600 2000 3000 M20595HEATERW8835LECTRONIC AIR CLEANERAIRW8835OR BOILERHIGH EFFICIENCYAIR CLEANERW8835 ENVIRAZONE PANEL568-02582Wiring ThermostatsRun wire from the T8635L Thermostat 1, 2, 3 terminals to the corresponding terminals on any one of the EnviraCom bus terminal sets. More than one thermostat can be connected to a bus terminal. See Fig. 3.Wiring EquipmentCONVENTIONAL EQUIPMENTConnect the first stage heat to W1/E, second stage heat to W2, and third stage heat to W3/Aux. Wire first stage cooling to Y1, and second stage cooling to Y2. See Fig. 3.If separate HVAC equipment transformers are used for the heating and cooling systems, such as for an oil furnace, wire the heating tra Features.2Specifications..2Ordering Information2Installation.4Startup and Checkout..8Operation8Troubleshooting..11W8835 ENVIRAZONE PANEL68-025822ORDERING INFORMATIONWhen purchasing replacement and modernization products from your TRADELINE wholesaler or distributor, refer to the TRADELINE Catalog or price sheets for complete ordering number.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 Automation and Control Products Sales Office (check white pages of your phone directory).2.Honeywell Customer Care1885 Douglas Drive NorthMinneapolis, Minnesota 55422-4386In CanadaHoneywell Limited/Honeywell Limite, 35 Dynamic Drive, Toronto, Ontario M1V 4Z9.International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.FEATURESControls up to three stage Specifications..2Ordering Information2Installa