Page 2 - SPECIFICATIONS • ORDERING INFORMATION; Ordering Information; Specifications; TRADELINE
60-2242—2 2 T921A,B,E-G SPECIFICATIONS • ORDERING INFORMATION Ordering Information When purchasing replacement and modernization products from your TRADELINE ® wholesaler or your distributor, refer to the TRADELINE ® Catalog or price sheets for complete ordering number or specify— 1. Model number.2....
Page 3 - SPECIFICATIONS; Scale
3 60-2242—2 T921A,B,E-G SPECIFICATIONS Fig. 1—T921 approximate installation dimen-sions in in. [mm]. SETTINGADJUSTMENT KNOB 1 1 M9107 3 [84] 5 16 5 [145] 1116 5 [137] 38 7 [194] 58 1 16 3 [78] 5 16 3 [84] 38 3 [86] 5 16 5 [135] 14 2 [57] FOR VERTICALCONDUIT BOX (2) HORIZONTAL CONDUIT BOX ACCESSORY A...
Page 4 - INSTALLATION; Installation; CAUTION; WHEN INSTALLING THIS PRODUCT...
60-2242—2 4 T921A,B,E-G INSTALLATION Installation ! CAUTION Disconnect power supply before installation toprevent electrical shock and equipment damage. WHEN INSTALLING THIS PRODUCT… 1. Installer must be a trained, experienced service tech- nician. 2. All wiring must comply with applicable electrica...
Page 5 - WIRING; Be sure all wiring must complies with applicable electri-
5 60-2242—2 T921A,B,E-G INSTALLATION Fig. 4—Vertical mounting of T921A,B,E-GThermostats on horizontal conduit box.T921A,B,E Thermostats can also be mountedhorizontally on vertical conduit box usingadd-on faceplate. (Do not mount T921F,Ghorizontally.) H O N E Y W E L L 80 70 60 60 70 80 90 NOTE: ACCE...
Page 6 - INSTALLATION • SETTING AND ADJUSTING; Setting and Adjusting; TEMPERATURE SETTING; Adjust all T921 models at the top of the thermostat for
60-2242—2 6 Fig. 7—Typical wiring diagram for T921B. T921A,B,E-G INSTALLATION • SETTING AND ADJUSTING Fig. 9—Typical wiring diagram for T921F. L1 (HOT) L2 1 1 SERIES 90MODULATINGMOTOR T921F M5993 CLASS 2 POWER SUPPLY. INTERCHANGE B AND W CONNECTIONS TO REVERSEDIRECTION OF MOTOR TRAVEL. USE FOR CLASS...
Page 7 - SETTING AND ADJUSTING • OPERATION; Model; Operation
7 60-2242—2 T921A,B,E-G SETTING AND ADJUSTING • OPERATION This switch energizes a heater that offsets the ther-mostat approximately 10 ° F [6 ° C], lowering the temperature for night operation. Leave this switch inthe OFF position for normal operation; turn it to theON position for lower night time ...
Page 8 - OPERATION␣; CHECKOUT
60-2242—2 8 Fig. 13—T921G auxiliary switch operation. T921A,B,E-G OPERATION␣ T921B 1. Place the changeover switch (see Fig. 11) in the HEAT position and follow steps 1 through 3 of the T921Aprocedure. 2. Move the switch to the COOL position and repeat steps 1 through 3 of the T921A procedure. 3. If ...