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T8700B,C
An Electronic Round™
Programmable Thermostat
PRODUCT DATA
FEATURES
• Attractive neutral styling complements any decor.
• Easy-to-use means fewer homeowner questions and
increased homeowner satisfaction.
• Large easy-to-read display.
•Keys located near the display for easy access.
•Fan and System switches are located on the top of the
wallplate to eliminate accidental setting changes.
• Quick and easy installation.
Two-period programming for added energy savings.
• Manual changeover fr
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O T U A N O N A F T8700B,C AN ELECTRONIC ROUND™ PROGRAMMABLE THERMOSTAT Cycle Rates (at 50 Percent Load): SPECIFICATIONS Heating: Selectable at 1, 3, 6 or 9 cph. See Table 2 for heating cycle rates and corresponding system equipment. IMPORTANT Cooling (T8700C): Fixed at 3 cph. The specifications given in this publication do not include normal manufacturing tolerances; therefore, Table 2. Heating Cycle Rates. an individual unit might not exactly match the listed specifications. Also, this product
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T8700B,C AN ELECTRONIC ROUND PROGRAMMABLE THERMOSTAT Location INSTALLATION Install the thermostat about 5 ft (1.5m) above the floor in an area with good air circulation at average temperature. See When Installing this Product… Fig. 2. Do not install the thermostat where it can be affected by: 1. Read these instructions carefully. Failure to follow them —Drafts or dead spots behind doors and in corners. could damage the product or cause a hazardous — Hot or cold air from ducts. condition. — Radia
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O T U A O T U N A O N A F N O N A F T A E T8700B,C AN ELECTRONIC ROUND™ PROGRAMMABLE THERMOSTAT ROUTE WIRING AS ALTERNATE MOUNTING SHOWN THROUGH SCREW HOLE WALL ENTRANCE HOLE MOUNTING SCREW HOLE DECORATOR PLASTIC SCREW COVER PLATE ANCHOR (2) R WALLPLATE 1 G Y W ALTERNATE MOUNTING SCREW HOLE MOUNTING M12529 SCREW HOLE WIRING ENTRANCE HOLE Fig. 4. T8700C wallplate wiring connections. (Refer to Table 1 for T8700B wiring connections.) 1 WHEN USING WALL ANCHORS, DRILL 3/16 INCH HOLES FOR DRYWALL,
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T8700B,C AN ELECTRONIC ROUND PROGRAMMABLE THERMOSTAT T8700 T8700 T8700 T8700 R G R W R W R W COOLING Y CONTACTOR L2 W L1 (HOT) 2 2 2 FAN HEATING RELAY 1 PRIMARY 1 CONTROL L1 (HOT) V8043E V8043E V8043E 24V L2 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND 1 3 3 3 OVERLOAD PROTECTION AS REQUIRED. M13207 Fig. 7. T8700C heat-cool wiring diagram in single trans- former system with gas or electric heat/electric cooling. B1 T T TO BURNER CONTROL T8700 CIRCUIT R 1 B2 G C1 C2 COOLING 2 Y CONTACTOR W FAN R
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O O T T U U A A N N O O N N A A F F T8700B,C AN ELECTRONIC ROUND™ PROGRAMMABLE THERMOSTAT Adjust Fan Operation Switch SETTINGS AND ADJUSTMENTS The thermostat fan operation switch, labeled Fuel switch, is set at the factory in the F position. See Fig. 12. This is the correct Setting Fan and System Switches setting for most systems. If this system is an electric heat Fan and system settings are controlled manually using the system, set the switch to the E position. The E setting allows the switche
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T8700B,C AN ELECTRONIC ROUND PROGRAMMABLE THERMOSTAT 2. Set your WAKE time. SETTING THE CLOCK AM a. Press the key 1. To set the current time: once. You will see a flashing WAKE time. M12507 a. Press the key PM once. You will see a b. Use the or keys to set your desired WAKE flashing clock. time. The WAKE time is now set. M12506 b. Use the or keys to set the current time. 3. Set your WAKE SET temperature. AM c. Press the key until End is displayed. a. Press the key once. You will see a M12508 f
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T8700B,C AN ELECTRONIC ROUND™ PROGRAMMABLE THERMOSTAT 2. Select Cycles Per Hour. Operating the Thermostat The display changes to To Display Temperature show current cycle SET Setting. rate setting. AM Press or once to M12520 display present tempera- a. Use or to ture setting. After approxi- select 1, 3, 6, or 9 cph. M12512 mately five seconds, the Refer to Table 4. thermostat displays current time and room temperature. Table 4. Heating Cycle Options To Make a Temporary SET Temperature Change.
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T8700B,C AN ELECTRONIC ROUND PROGRAMMABLE THERMOSTAT Fan Control OPERATION The FAN switch settings for the T8700B1015 with Fan and T8700C are ON and AUTO. Zero Droop Performance ON: The fan runs continuously. The T8700 Thermostat can control temperature closer to AUTO: In cooling, the fan starts and stops with the cooling setpoint than electromechanical thermostats. This is because equipment. In heating, the fan starts a few minutes after proportional plus integral control (P + I) maintains a co
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T8700B,C AN ELECTRONIC ROUND™ PROGRAMMABLE THERMOSTAT Table 5. Sequence of Operations. Fan Switch Settings System Switch Settings Call for Action Energize Terminals Display Icons AUTO OFF None None None ON Any Any G None b b AUTO COOL Cooling G, Y a AUTO HEAT Heating W,G a When fuel switch is in the E position. (T8700B with Fan and T8700C). b T8700C only. IMPORTANT CHECKOUT A mimimum off-timer for the T8700C assures that the cooling compressor does not come on again for at least five minutes af
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T8700B,C AN ELECTRONIC ROUND PROGRAMMABLE THERMOSTAT TROUBLESHOOTING Symptom Possible Cause Corrective Action Heating/cooling No ac power. Check power to heating/cooling equipment: equipment does not — On/Off switch. operate. — Fuse or circuit breaker. — Loose 24V connection: at thermostat; at furnace/air conditioner. — Incorrect wiring: check appropriate wiring diagram. Thermostat inoperative. See Checkout section. Incorrect wiring. Check wiring. Heating/cooling equipment Consult equipment m
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T8700B,C AN ELECTRONIC ROUND™ PROGRAMMABLE THERMOSTAT Home and Building Control Home and Building Control Honeywell Asia Pacific Inc. Honeywell Inc. Honeywell Limited-Honeywell Limitée Room 3213-3225 Honeywell Plaza 155 Gordon Baker Road Sun Hung Kai Centre P.O. Box 524 North York, Ontario No. 30 Harbour Road Minneapolis MN 55408-0524 M2H 3N7 Wanchai Hong Kong Honeywell Latin American Region Honeywell Europe S.A. 480 Sawgrass Corporate Parkway 3 Avenue du Bourget Suite 200 1140 Brussels Sunrise
