Honeywell D manual

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Table of contents for the manual

  • Page 1

    X-XX UL INST ALLA TION INSTRUCTIONS ®U.S. Registered Trademark Copyright © 1998 Honeywell Inc. • • All Rights Reserved T81 12C,D Electronic Programmable Thermostats APPLICA TION The T8112C,D thermostats provide electronic programmab le control for 24 to 30 V ac heating and cooling systems. RECYCLING NO TICE If this control is replacing a cont[...]

  • Page 2

    69-0917 — 2 2 T8112C ,D ELECTRONIC PROGRAMMABLE THERMOST A TS 1. Remov e mounting plate from the wall, and drill 3/16 inch holes in wall (if drywall) as marked. F or firmer material such as plaster or wood, dr ill 7/32 inch holes. Gently tap anchors (provided) into drilled holes until flush with the wall. 2. Reposition mounting plate ov er holes,[...]

  • Page 3

    69-0917 — 2 3 T8112C,D ELECTR ONIC PROGRAMMABLE THERMOST A TS R Rc W Y G B D A C 2-WIRE HEAT-ONLY (JUMPER INTACT) M1709B L1 (HOT) L2 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 1 1 HEATING RELAY OR VALVE COIL JUMPER R Rc W Y G B D A C 5-WIRE HEAT/COOL (JUMPER REMOVED) L1 (HOT) L2 POWER SUPPLY. PROVIDE DISCONNECT ME[...]

  • Page 4

    69-0917 — 2 4 T8112C ,D ELECTRONIC PROGRAMMABLE THERMOST A TS M1712A JUMPER (FACTORY- INSTALLED) REMOVE IF 5-WIRE SYSTEM INSERT STRAIGHT UNDER SCREW HEAD 5/16 in. (8 mm) STRIP END OF WIRE VISIBLE HERE R R c WY G M3002A T8112C M5780 B. PRESS LOWER EDGE OF CASE TO LATCH. A. ENGAGE TABS AT TOP OF THERMOSTAT AND MOUNTING PLATE. TU AM LEAVE Fig. 8. Pr[...]

  • Page 5

    69-0917 — 2 5 T8112C,D ELECTR ONIC PROGRAMMABLE THERMOST A TS As the batteries are running low , a “ bAt Lo ” indicator flash for one to two months bef ore batteries run out completely . Replace the batteries as soon as possible after the indicator star ts flashing. If the batteries are not replaced sometime during the flashing “ bAt Lo , ?[...]

  • Page 6

    69-0917 — 2 6 T8112C ,D ELECTRONIC PROGRAMMABLE THERMOST A TS CHECKOUT Heating Do not check heating system operation b y jumpering thermostat ter minals at the primar y control such as the gas valv e, zone v alve, or oil b urner control This will damage the thermostat. Instead, y ou could jumper R and R wires at the thermostat. Cooling T o a void[...]

  • Page 7

    69-0917 — 2 7 T8112C,D ELECTR ONIC PROGRAMMABLE THERMOST A TS TROUBLESHOOTING GUIDE NO TICE This equipment is a Class B digital apparatus, which complies with Canadian Radio Interf erence Regulations, CRC c.1374. If … Then … Display will not come on. • Set the system switch to OFF. Remove batteries. Insert batteries backward for at least fi[...]

  • Page 8

    69-0917 — 2 8 T8112C ,D ELECTRONIC PROGRAMMABLE THERMOST A TS Home and Building Control Honeywell Limited-Honeywell Limitée 155 Gordon Baker Road North York, Ontario M2H 3N7 69-0917 — 2 G.H. Rev . 4-98 Printed in Mexico www .honeywell.com Home and Building Control Honeywell Inc. Honeywell Plaza P.O. Box 524 Minneapolis, MN 55408-0524[...]