Instruction/ maintenance manual of the product 63-2666-03 Honeywell
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PRODUCT DATA 63-2666-03 T7351 Commer cial Pr ogrammable Thermostat FOR SINGLE- OR MULTI-STAGE CO NV ENTIONAL/HEAT PUMP SYSTEMS APPLICATION The T7351 Commercial Programmable Thermostat controls 24 V ac commercial single zone heating, v entilating and air conditioning (HV A C) equi pment.
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT 63-2666—0 3 2 OR DERING INFORMATION When purchasing replacement and moder nizat ion products from your TRADELINE® wholesaler or distr ibutor , refer to the TRADELINE® Catalog or price sheets for complete ordering number .
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT 3 63-2666—0 3 T able 2. Default Se tpoints. Fig. 1. Thermo stat and Subbase Dimens ions in inches (mm). Accessories: Duct Discharge Air Sensors: C7041B (6 or 12 in . [152 or 305 mm]), C7041C (18 in. [457 mm]), C7041J (12 ft.
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT 63-2666—0 3 4 CAUTION Equipment Damage Hazard. Can damage the TIM con n ection be yond repair . Disconnect the TIM cable prior to opening or closing the ther mostat cov er . NO TE: Allow sufficient clearan ce below the thermostat to plug in the TIM cable .
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT 5 63-2666—0 3 Fig. 5. Nine TR21 Sensor s Pr oviding a T emperature A veraging Network fo r T7351 Thermostat. Fig. 6. Mountin g the Subbase. Wiring CAUTION Electrical Shock or Equi pment Damage Hazard. Can shoc k individuals or short equipment cir cuitry .
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT 63-2666—0 3 6 a F actor y jumper between RC and RH f or system s with one transf o rmer. b F or changeover functional details, see Operation section. c HC connection is not needed when using a TR23-H senso r .
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT 7 63-2666—0 3 Setting System and F an System default setting is Auto . F a n default setting is On. NO TE: Use System and Fa n keys to change settings . System Settings — A uto: Th ermostat automatic ally ch anges between heating and cooling based on indoor temperature.
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT 63-2666—0 3 8 a In heat mode, when set f o r conv entional heat, the equ ipment (i.e. plenum s witch) could power the f an de spite the T7350. Fig. 8. Th ermostat Ke y Locations. INSTALLER SETUP F or mo st applications, the ther mostat factory settings do not need to be charged.
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT 9 63-2666—0 3 a. If you want to sa ve the ne w conf iguration, use the u p or down ke y to change NO to YES bef ore pressing Run Schedule . b . If you w ant the configuration to remain as it was before starting this change, ensure the display indicates SA V CFG NO and press Run Schedule .
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT 63-2666—0 3 10 OA TSENS 0 0 - 1 Outdoor Air Sensor Se lection 0: None 1: Remote Outdoor Air Sensor D A TSENS 0 0 - 1 Discharge Air Sensor Selection 0: None.
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT 11 63-2666—0 3 Holida ys and 365 - Day Cloc k The T7351can be configured to schedule up to 10 separate holidays , each with a duration of up to 99 da ys. T o enable this function, the user must set the date: 1.
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT 63-2666—0 3 12 4. Use the Up/Down ke ys to set the day , then press the ke y (Refer to T able 6 f or valid da y choices).
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT 13 63-2666—0 3 a On: Continuous fan operation during occupied per iods. During not occu pied peri ods and in standby mode when no motion is sensed, fan cycles with ca ll f or heat or cool. A uto: Fan cycles with call f or heat or cool during all periods.
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT 63-2666—0 3 14 T7351 Rela y Logic All T7351 model ther mostats cont ain at l east fo ur switc hing relays . In conventional applications, the rela ys control first stage cooling, first stage heating, f an, and auxiliar y .
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT 15 63-2666—0 3 — Recov er y ramping applies between schedul ed heat or cool setp oint changes from not occupi ed to standby and not occupied to occupied. — Other setpoint changes use a setpo int step change.
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT 63-2666—0 3 16 The potentiometer adjusts t he minimum position of the economizer dampers, which pro vide a minimum amount of fresh air f or ve ntilation. The economizer reduces comp ressor run time, thereby sa ving energy and extending compressor life .
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT 17 63-2666—0 3 T able 9. Default A uxiliar y Relay Operations. a Simple dehumidification uses a normally closed contact. The re la y is close d when humidity is below the high limit. When the humidity is above the high limit, the contact is open.
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT 63-2666—0 3 18 T able 10. Hot Gas Bypa ss Dehumidification Logic. Auxiliary output dur ing call for multiple cooling stages f or two reasons: 1. This method assumes that the cooling provides dehumidification.
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT 19 63-2666—0 3 WIRING DIAGRAM (FIGURES 14 AND 15) Fig. 14. T ypical Hookup of T7351F2010 in Three-Stag e Heat and Three-Stage Cool Conv entional System with One T ransformer . Cooling will not come on. No power to the thermostat.
T7351 COMMERCIAL PROGRAMMAB LE THER MOSTAT Automation and Control Solu tions Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 customer.honeywell.com ® U .S. Registered T rademark © 2013 Hone ywell International Inc. 63-2666—03 M.
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