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Manual Honeywell T874A

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  • Honeywell T874A - page 1

    S. M. • Rev. 6-93 • • ©Honeywell Inc. 1993 • Form Number 69-0580—2 M3375 T874A,D Zone Thermostats/ Q674B,D,E Subbases TABLE 2—THERMOSTAT/SUBBASE SPECIFICATIONS. Thermostat/ Anticipator Range (A) Thermostat/Subbase Switching Subbase Heating Cooling Order Number a System Fan Color (Adj.) (Fixed) T874A1465/Q674B1471 HEAT-OFF-COOL ON-AUTO ...

  • Honeywell T874A - page 2

    Installation WHEN INSTALLING THIS PRODUCT… 1. Read these instructions carefully. Failure to fol- lo w them could damage the product or cause a hazard- ous condition. 2. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application. 3. Installer must be a trained, experienced service techn ...

  • Honeywell T874A - page 3

    3 69-0580—2 letter code is located near each subbase terminal for identi- fication. The terminal barrier permits straight or conven- tional wraparound wiring connection (Fig. 4). 2. Some Q674 Subbases have RC and RH terminals for isolated heating and cooling transformers. For zoning systems, jumper RC and RH terminals as shown in Fig. 5 and wire ...

  • Honeywell T874A - page 4

    MOUNTING THE THERMOSTAT 1. Remove the thermostat cover by pulling the bottom edge of the cover outward away from the base until it snaps free from the cover clip. NOTE: The cover is hinged at the top and is removed by pulling out at the bottom. 2. Carefully remove and discard the polystyrene packing insert that protects the mercury switches during ...

  • Honeywell T874A - page 5

    5 69-0580—2 Fig. 8—Typical hookup for MABS II and MABS II-L Control Panels with T874D Thermostat/Q674B,D Subbases in multistage heating-cooling zone system. MABS II Control Panel shown; MABS II-L Control Panel hookup is the same. M1393A Y2 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. JUMPER RC, RH TOGETHER AND W ...

  • Honeywell T874A - page 6

    6 Fig. 9—Typical hookup for MABS XX Control Panel with T874A Thermostat/Q674B,E Subbases in single- stage heating-cooling zone system. M1636 1 2 3 4 5 6 7 8 9 ADD-A- ZONE HEAT FAN COOL HEAT FAN COOL HEAT FAN COOL YW G G h 456 Z DAMPER ACTUATOR 12 3X L1 (HOT) L2 1 MABS XX CONTROL PANEL 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTI ...

  • Honeywell T874A - page 7

    r ...

  • Honeywell T874A - page 8

    Settings ...

  • Honeywell T874A - page 9

    9 69-0580—2 Checkout TABLE 5—SYSTEM SET-UP FOR THERMOSTAT CHECKOUT. Heating Cooling Control Zones Other Zones Other Panel Zone 1 Than Zone 1 Zone 1 Than Zone 1 Mini-zone Set thermostat Move the heating set Set thermostat Move the cooling set MABS II system switch to point lever 10 ° F system switch to point lever 10 ° F MABS II-L HEAT; set fa ...

  • Honeywell T874A - page 10

    Fig. 14—Thermometer calibration. Calibration THERMOSTAT T874 thermostats are accurately calibrated at the factory. They do not have provision for field calibration. THERMOMETER The thermometer in your thermostat has been accu- rately calibrated at the factory. The thermometer should only need adjustment if it has been dropped or shifted due to mi ...

Manufacturer Honeywell Category Thermostat

Documents that we receive from a manufacturer of a Honeywell T874A can be divided into several groups. They are, among others:
- Honeywell technical drawings
- T874A manuals
- Honeywell product data sheets
- information booklets
- or energy labels Honeywell T874A
All of them are important, but the most important information from the point of view of use of the device are in the user manual Honeywell T874A.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Honeywell T874A, service manual, brief instructions and user manuals Honeywell T874A. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Honeywell T874A.

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A complete manual for the device Honeywell T874A, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Honeywell T874A by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Honeywell T874A.

A complete Honeywell manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Honeywell T874A - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Honeywell T874A, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Honeywell T874A, that we can find in the current document
3. Tips how to use the basic functions of the device Honeywell T874A - which should help us in our first steps of using Honeywell T874A
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Honeywell T874A
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Honeywell T874A in a specific country, if it was not possible to solve the problem on our own.

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