Honeywell T874W manual

1
2
3
4
5
6
7
8

Go to page of

A good user manual

The rules should oblige the seller to give the purchaser an operating instrucion of Honeywell T874W, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.

What is an instruction?

The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of Honeywell T874W one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.

Unfortunately, only a few customers devote their time to read an instruction of Honeywell T874W. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.

What should a perfect user manual contain?

First and foremost, an user manual of Honeywell T874W should contain:
- informations concerning technical data of Honeywell T874W
- name of the manufacturer and a year of construction of the Honeywell T874W item
- rules of operation, control and maintenance of the Honeywell T874W item
- safety signs and mark certificates which confirm compatibility with appropriate standards

Why don't we read the manuals?

Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Honeywell T874W alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of Honeywell T874W, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Honeywell service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of Honeywell T874W.

Why one should read the manuals?

It is mostly in the manuals where we will find the details concerning construction and possibility of the Honeywell T874W item, and its use of respective accessory, as well as information concerning all the functions and facilities.

After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.

Table of contents for the manual

  • Page 1

    X-XX UL INST ALLA TION INSTR UCTIONS Copyright © 1996 Honeywell Inc. • • All Rights Reserved T874H,Q,W Multistage Thermostats and Q674B,C,G,L Subbases APPLICA TION The T874H,Q,W Multistage Thermostats provide 24 to 30 Vac control for heating and cooling systems as listed in Table 1. Table 1. Heating and Cooling Stages. a Plus a changeover stag[...]

  • Page 2

    69-0087 — 6 2 T874H,Q,W MUL TIST AGE THERMOST A TS AND Q674B,C,G,L SUBBASES M6009 VERTICAL OUTLET BOX ADAPTER RING COVER PLATE MOUNTING SCREWS (2) 1 SUBBASE SUBBASE MOUNTING SCREWS (2) HORIZONTAL OUTLET BOX 1 2 2 1 NOT INCLUDED WITH UNIT. 2 ACCESSORY PARTS AVAILABLE (193121A). THERMOSTAT CAPTIVE MOUNTING SCREWS (2) 5 0 6 0 7 0 8 0 5 0 6 0 7 0 8 0[...]

  • Page 3

    69-0087 — 6 3 T874H,Q,W MUL TIST AGE THERMOST A TS AND Q674B,C,G,L SUBBASES FOR STRAIGHT INSERTION – STRIP 5/16 in. (8 mm) FOR WRAPAROUND – STRIP 7/16 in. (11 mm) SUBBASE TERMINAL SCREW M928 BARRIER L1 (HOT) L2 1 FAN RELAY Y2 SYSTEM SWITCH OFF AUTO H1 ANTICIPATOR CO H1 FALL 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS R[...]

  • Page 4

    69-0087 — 6 4 T874H,Q,W MUL TIST AGE THERMOST A TS AND Q674B,C,G,L SUBBASES L2 1 OFF H1 ANTICIPATOR H2 ANTICIPATOR H1 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. M6008A Y1 W1 C1 ANTICIPATOR AUTO FALL FALL CHANGEOVER RELAY L1 (HOT) R FAN RELAY COMPRESSOR CONTACTOR G 3 THERMOSTAT SUBBASE SYSTEM COMPONENTS NO FAN SW[...]

  • Page 5

    69-0087 — 6 5 T874H,Q,W MUL TIST AGE THERMOST A TS AND Q674B,C,G,L SUBBASES 1 L1 (HOT) L2 T W3 U G R E L X B O Y1 Y2 C815A OD THERMISTOR AUX. HEAT RELAY FAN RELAY EM. HEAT RELAY COMPRESSOR MONITOR CHANGEOVER RELAY (HEAT) CHANGEOVER RELAY (COOL) COMPRESSOR CONTACTOR 1 COMPRESSOR CONTACTOR 2 EM.HEAT AUTO ON FAN SWITCH H1 ANTICIPATOR H2 ANTICIPATOR [...]

  • Page 6

    69-0087 — 6 6 T874H,Q,W MUL TIST AGE THERMOST A TS AND Q674B,C,G,L SUBBASES Fig. 9. T874W/Q674L for three-stage heat and two-stage cool with outdoor reset. 1 T W3 G R E X1 C B O X2 Y1 Y2 C815A OUTDOOR THERMISTOR AUX. HT. RELAY FAN RELAY EM. HT. RELAY CHANGEOVER RELAY (HEAT) CHANGEOVER RELAY (COOL) COMPRESSOR CONTACTOR 1 COMPRESSOR CONTACTOR 2 EM.[...]

  • Page 7

    69-0087 — 6 7 T874H,Q,W MUL TIST AGE THERMOST A TS AND Q674B,C,G,L SUBBASES THERMISTOR RESISTANCE C815A THERMISTOR RESISTANCE R = 400 ohms ± 10% AT 77 ° F (25 ° C) 4600 4400 4200 4000 3800 3600 3400 3200 3000 2800 2600 2400 2200 2000 1800 1600 1400 1200 1000 800 600 400 200 0 -20 0 20 40 60 80 100 120 140 TEMPERATURE OF THERMISTOR ( ° F) M159[...]

  • Page 8

    69-0087 — 6 8 T874H,Q,W MUL TIST AGE THERMOST A TS AND Q674B,C,G,L SUBBASES Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Scarborough, Ontario M1V 4Z9 Automation and Control Solutions Honeywell Internationl, Inc. 1985 Douglas Drive North Golden Valley, MN 55422 69-0087 — 6 C.H. Rev . 9-96 www .honeywell.com M5070 Fan (Select Models) Mov[...]