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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of Honeywell T8621DA, 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.
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First and foremost, an user manual of Honeywell T8621DA should contain:
- informations concerning technical data of Honeywell T8621DA
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Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Honeywell T8621DA 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 T8621DA, 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 T8621DA.
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Table of contents for the manual
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Page 1
APPLICATION T8621A,C,D, CHRONOTHERM III FUEL SAVER THERMOSTATS These thermostats provide energy saving control for a 24 Vac heating/cooling system as indicated in Table 1, and are powered direct from the control transformer. As long as thermostat is continuously powered, the thermostat will be compatible with any control system. These models includ[...]
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Page 2
2 Fig. 2—Mounting subbase on wall. Fig. 3—Restrict wiring to recessed area surrounding terminals. WIRING All wiring must comply with local electrical codes and ordinances. Disconnect power before wiring to prevent electrical shock or equipment damage. The shape of the terminal barrier permits insertion of straight or conventional wraparound wir[...]
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Page 3
3 69-0330 — 3 Fig. 5 — T8621C,D 2-stage heat/2-stage cool thermostat with HEAT-AUTO-COOL-OFF system and AUTO-ON fan switching. For T8621C, delete second cooling stage. Fig. 6 — T8621C,D single-stage heat pump thermostats with cooling changeover. HEAT-AUTO-COOL- OFF system and AUTO-ON fan switching. M1573 HEATING TRANSFORMER R C W1 W2 HEAT REL[...]
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Page 4
4 Fig. 8 — T8621D 2-stage heat/2-stage cool manual changeover thermostat with auto fan on heat and cool; convertible to auto fan on cool only. HEAT-OFF-COOL system and AUTO-ON fan switching. Fig. 7 — T8621C,D single-stage heat pump thermostats with heating changeover. HEAT-AUTO-COOL- OFF system and AUTO-ON fan switching. M1576 SYSTEM TRANSFORME[...]
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Page 5
5 69-0330 — 3 Fig. 9 — T8621D single-stage manual changeover heat pump thermostat. HEAT-OFF-COOL system and AUTO-ON fan switching. The room air temperature will normally vary slightly from the comfort temperature setting with the cycling of the furnace or air conditioner. The heating cycle rate of this thermostat is factory-set for gas/oil warm[...]
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Page 6
When the batteries are low, the display will flash REPL BAT. The building owner will have 20-30 seconds to install new batteries after removing old batteries from thermostat. After 20-30 seconds, it will be necessary to reprogram. REPL BAT indication will disappear when ther- mostat is mounted back on the subbase. If batteries are completely dead, [...]
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Page 7
SYSTEM PRESS LOOK FOR THIS RESPONSE SWITCH THIS KEY KEY POSITION KEY DOWN RELEASED OFF 03 Blank 07 Blank 15 Blank COOL or 15 1st stage cooling, AUTO (with fan and SYSTEM f a n in A UT O) LED on. 15 2nd stage cooling also on. 15 2nd stage cooling off. 15 1st stage cooling, fan and SYSTEM LED off. NOTE: If single-stage cooling system, press key twice[...]
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Page 8
SYSTEM FOURTH CLOCK SWITCH DIGIT DEGREES (HRS) POSITION 0 F 12 COOL, AUTO or OFF 1 F 24 COOL, AUTO or OFF 2 F 12 HEAT 3 F 24 HEAT 4 C 12 COOL, AUTO or OFF 5 C 24 COOL, AUTO or OFF 6 C 12 HEAT 7 C 24 HEAT Honeywell Inc. International Sales Offices in all principal cities of the world. Manufacturing in U.S.A.: 1885 Douglas Drive N. Australia, Canada,[...]