Summary of the content on the page No. 1
T7350 Commercial Programmable Thermostat
FOR SINGLE- OR MTG512ULTI-STAGE CONVENTIONAL/HEAT PUMP
SYSTEMS
PRODUCT DATA
FEATURES
• Typically used in buildings (including: restaurants,
shopping malls, office buildings and banks) under
55,000 square feet.
• For single zone rooftop units, split systems, heat
pumps or hot/chilled water systems.
• 7-day programming.
• Two Occupied and two Not Occupied periods per day.
• Thermostat Interface Module (TIM) connections to
thermostat from PDA for advanc
Summary of the content on the page No. 2
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT FEATURES (continued from page 1) Features Available via PDA Configuration Features via Optional Network Model-H ® • 365 day clock with holiday programming. • Communications on LonTalk network. • Automatic Daylight Saving Time adjustments. • Network Tools (LonSpec, CARE) have ability to configure all PDA available features. • Selectable dehumidification limit control. • T7350 Network data inputs including outdoor air • Modulating output configuration. te
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT SPECIFICATIONS IMPORTANT Models: See Table 1. The specifications given in this publication do not include normal manufacturing tolerances. Therefore, Dimensions: See Fig. 1. this unit might not exactly match listed specifications. This product is tested and calibrated under closely Finish (color): Trident White. controlled conditions; minor performance differences can be expected if those conditions are changed. Batteries: No batteries required. Table
Summary of the content on the page No. 4
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT PDA System Requirements: Accessories: ® Palm OS : 3.5.x to 5.2.1 Duct Discharge Air Sensors: Dynamic Heap: 256K bytes. C7041B (6 or 12 in. [152 or 305 mm]), Free RAM Space: 1000K bytes. C7041C (18 in. [457 mm]), Serial Communications: RS-232. C7041J (12 ft. [3.66 m] averaging), C7770A (8 in. [203 mm] probe). Approvals: Outdoor Air Sensors: C7089A, C7170A, European Community Mark (CE) Listed. C7031G2014 (weatherproof). UL 873 Recognized, NEC Class 2.
Summary of the content on the page No. 5
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Hardware Output Hardware Output Node SCC-Rooftop Object Object Number 8504. nviRequest nvoStatus nviSpaceTemp nvoSpaceTemp Mandatory nv1 nv1 nv2 Mandatory nv26 SNVT_obj_request SNVT_ obj_status SNVT_temp_p SNVT_ temp_p Network Network nvoUnitStatus Variables Variables nv27 SNVT_hvac_status nviTimeSet nvoFileStat nv3 nv6 SNVT_ time_stamp SNVT_file_status nviSetpoint nvoEffectSetpt nv2 nv28 Optional SNVT_ temp_p SNVT_temp_p nviFileReq nv5 Network SNVT_fil
Summary of the content on the page No. 6
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT INSTALLATION When Installing this Product... CAUTION 1. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous Equipment Damage Hazard. condition. Can damage the TIM connection beyond repair. 2. Check ratings given in instructions and on the product to Disconnect the TIM cable prior to opening or closing ensure the product is suitable for your application. the thermostat cover. 3. Installer must be a trai
Summary of the content on the page No. 7
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT — for a vertical box, part 209651A is required. — Mount to European standard wall box (having 60.3 mm SUBBASE [2.4 in.] between mounting screws in a horizontal line) with T4 T3 or without adaptive hardware. T7770A T7770A T7770A 1. Position and level the subbase. T T T T T T NOTE: A level wallplate is only for appearance. The thermostat functions properly when not level. 2. Use a pencil to mark the mounting holes. (See Fig. 7.) 3. Remove the subbase fro
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 4. T7350B Subbase for Two-stage Heat, Wiring Two-stage Cool Systems. Terminal CAUTION Electrical Shock or Equipment Damage Hazard. Can shock individuals or short equipment circuitry. Disconnect power supply before installation. Description a a 24 VAC Cooling transformer. IMPORTANT RC RC All wiring must comply with local electrical codes a a 24 VAC Heating transformer. RH RH and ordinances. X X Common. NOTE: Maximum (and recommended) wire size is
Summary of the content on the page No. 9
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 5. T7350D Subbase for Three-stage Heat, Table 6. T7350H Subbase for Three-stage Heat, Three- Three-stage Cool Systems. stage Cool Systems with Network Communications Terminal Terminal Description Description a a a a 24 VAC Cooling transformer. 24 VAC Cooling transformer. RC RC RC RC a a a a 24 VAC Heating transformer. 24 VAC Heating transformer. RH RH RH RH X X Common. XX Common. b b aux aux Auxiliary relay. Auxiliary relay connection (normally open
Summary of the content on the page No. 10
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 7. T7350H Subbase for Modulating Systems with Table 8. T7350M Subbase for Modulating Systems. Network Communications. Terminal Terminal Description Description a — 24 VAC Cooling transformer. RC a — 24 VAC Cooling transformer. RC a — 24 VAC Heating transformer. RH a — 24 VAC Heating transformer. RH X — Common. X— Common. aux — Auxiliary relay or 2nd stage of heating or cooling. b b Auxiliary relay connection (normally open). aux aux W1 — Stage 1 hea
Summary of the content on the page No. 11
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT NOTE: See Fig. 9 for keypad information. A. ENGAGE TABS AT TOP OF THERMOSTAT AND SUBBASE OR WALLPLATE. Setting Temperature Refer to Table 2 for the default temperature setpoints. See Programming section for complete instructions on changing the setpoints. Setting System and Fan System default setting is Auto. Fan default setting is On. NOTE: Use System and Fan keys to change settings. System Settings — Auto: Thermostat automatically changes between hea
Summary of the content on the page No. 12
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT INSTALLER SETUP For most applications, the thermostat factory settings do not NOTE: When power is first applied to the thermostat, the need to be changed. Review the factory settings in Table 10. display will show all segments (see Fig. 10). a Table 10. Keypad Configurable Installer Setup Options . Configuration Option Factory Default Description Degree temperature display DEG F Temperature display: °F or °C Remote room temperature sensor LOC SEN LOC: Us
Summary of the content on the page No. 13
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT — No options lockout special keypresses. See a. To restore the factory defaults, press up or the Special Functions section for details. down until the display indicates YES. 4. Once the proper option is chosen, exit Installer Setup by b. To cancel this option, ensure display indicates NO. pressing Run Schedule. 3. Press Run Schedule. 5. The display prompts SAV CFG (save configuration). If you want to save it, use the up or down key to Get Factory S
Summary of the content on the page No. 14
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 11. T7350 Key Function Summary. Grouping Button Definition Information Down Arrow Lowers setpoint, day, or time. When setting times or temperatures, hold key down to continuously decrease value. Also can make temporary change in temperature setpoint. Information Obtains information (where humidity “high-limit” can be set), cycles through setup options. Up Arrow Raises setpoint, day, or time. When setting times or temperatures, hold key down to c
Summary of the content on the page No. 15
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT PROGRAMMING The thermostat operates at the Occupied temperature setting Setting Current Day/Time until the thermostat is programmed. Table 12 shows the This can be done using the keypad or a PDA interface. default temperature settings. (The program has four): — Occupied heat. IMPORTANT — Occupied cool. • Once you set the day/time once, you should not — Not Occupied heat. need to set it again. As a result, once a PDA sets the — Not Occupied cool. day u
Summary of the content on the page No. 16
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT 3. Press up or down until the desired time is 3. The Maximum Occupied Heat Setpoint is limited displayed. by Occupied Cool Setpoint – 2° F (1° C). 4. Press Run Schedule. 4. The Minimum Occupied Cool Setpoint is limited by the Occupied Heat Setpoint + 2° F (1° C). IMPORTANT — Invalid holidays are ignored. Programming Temperature Setpoints — Valid holidays require valid: month, day and duration. 1. Press Occupied Heat. — Holidays such as the fifth Tuesd
Summary of the content on the page No. 17
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT NOTES: Using Temporary Occupied Override — If the number of days is set to zero, no temporary The Temporary Occupied Override can be used when the change takes effect. T7350 is in Not Occupied or Standby mode. It switches to the — If the number of days is set just below zero, the Occupied mode for a fixed number of hours. display for days is “---” (an indefinite override). — To turn off this override, you must press Run 1. To use the default occupied
Summary of the content on the page No. 18
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT OPERATION Startup Operation Emergency Heat Upon initial thermostat powerup, a startup and initialization (select T7350 Thermostats only) program begins. This startup occurs only on initial powerup. With the system set for Em Heat, auxiliary heat serves as After total loss of power for an extended period, the current stage one; compressor stages are locked off. The fan cycles time and day can be lost (requiring reset). However, the with the auxiliar
Summary of the content on the page No. 19
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT —The Derivative Time (DT), also called Derivative Gain, Recovery Ramping for Heat Pump Systems determines the impact of the error rate on the output signal. During recovery with heat pump equipment, the heating The error rate is how fast the error value changes. It can setpoint is split into a heat pump setpoint for compressors, also be the direction the space temperature is going, either and two auxiliary heat setpoints for the auxiliary heat stage
Summary of the content on the page No. 20
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT fall into this temperature category. By permitting 80 to 100 percent outside air into the system, mechanical cooling may COOL RECOVERY RAMP RATE not be needed at all, particularly during Spring and Fall. (DEGREES/HOUR) Economizers take advantage of outside air. The typical economizer consists of an outside air damper, motor, outdoor MaxClRamp air changeover control and a minimum position potentiometer. The motor controls the dampers. Suitability of
