Instruction/ maintenance manual of the product Q674L Honeywell
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X-XX UL INST ALLA TION INSTRUCTIONS ®U.S. Registered Trademark Copyright © 1997 Honeywell Inc. • • All Rights Reserved T874R Thermostats and Q674L Subbases Installation Instructions for the T rained Service T echnician.
69-0392—9 2 T874R THERMOST A TS AND Q674L SUBBASES OPERA TION On a 2-heat thermostat, the two stages of heat make sequentially as the temperature drops.
69-0392—9 3 T874R THERMOST A TS AND Q674L SUBBASES M925 VERTICAL OUTLET BOX ADAPTER RING SUBBASE COVER PLATE MOUNTING SCREWS (2) MOUNTING SCREWS (2) 1 SUBBASE MOUNTING SCREWS (2) HORIZONTAL OUTLET BOX 1 2 2 NOT INCLUDED WITH UNIT. ACCESSORY PARTS AVAILABLE (193121A).
69-0392—9 4 T874R THERMOST A TS AND Q674L SUBBASES Fig. 5. Internal schematic and typical wiring diagram for Y594R1763 (T874R1954/Q674L1827). Replaces GE AY28X078, AY28X139; Trane Baystat 139, Baystat 239 and Baystat 240; and Honeywell Y594R1136 Thermostats.
69-0392—9 5 T874R THERMOST A TS AND Q674L SUBBASES Fig. 7. Internal schematic and typical wiring diagram for Y594R1300 (T874R1475/Q674L1520); fixed anticipation. H2 FALL H1 FALL C1 L1 (HOT) L2 1 2 2 1 2 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
69-0392—9 6 T874R THERMOST A TS AND Q674L SUBBASES Fig. 9. Internal schematic and typical wiring diagram for Y594R1664 (T874R1871/Q674L1736) and Y594R1706 (T874R1913/Q674L1777). Exact replacement for York model no. 2TH11702224. H2 FALL H1 FALL C1 L1 (HOT) L2 1 FAN SWITCH AUTO ON FAN RELAY AUX.
69-0392—9 7 T874R THERMOST A TS AND Q674L SUBBASES Fig. 11. Internal schematic and typical wiring diagram for Y594R1672 (T874R1889/Q674L1736) and Y594R1698 (T874R1905/Q674L1777). Exact replacement for York model nos. 2TH11702324 and 6TH11702224. H2 FALL H1 FALL C1 L1 (HOT) L2 1 FAN SWITCH AUTO ON FAN RELAY AUX.
69-0392—9 8 T874R THERMOST A TS AND Q674L SUBBASES Mounting the Thermostat 1. Remove the thermostat cover by pulling the bottom edge of the cover away from the base until it snaps free from the cover clip. NOTE: The cover is hinged at the top and can be removed by pulling out at the bottom.
69-0392—9 9 T874R THERMOST A TS AND Q674L SUBBASES M5070 CHECKOUT Heating Move the system switch on the Q674 Subbase to HEAT. Move the setpoint lever on the T874 Thermostat about 10 ° F (6 ° C) above room temperature. Both stages of heating and the fan should start.
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69-0392—9 11 T874R THERMOST A TS AND Q674L SUBBASES.
69-0392—9 12 T874R THERMOST A TS AND Q674L SUBBASES 69-0392—9 G.H. Rev . 10-97 www .honeywell.com/yourhome Automation and Control Solutions Honeywell International Inc.
An important point after buying a device Honeywell Q674L (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Honeywell Q674L yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Honeywell Q674L - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Honeywell Q674L you will learn all the available features of the product, as well as information on its operation. The information that you get Honeywell Q674L will certainly help you make a decision on the purchase.
If you already are a holder of Honeywell Q674L, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Honeywell Q674L.
However, one of the most important roles played by the user manual is to help in solving problems with Honeywell Q674L. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Honeywell Q674L along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
