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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of Carrier 38YRA, 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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The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of Carrier 38YRA 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 Carrier 38YRA. 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 Carrier 38YRA should contain:
- informations concerning technical data of Carrier 38YRA
- name of the manufacturer and a year of construction of the Carrier 38YRA item
- rules of operation, control and maintenance of the Carrier 38YRA 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 Carrier 38YRA 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 Carrier 38YRA, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Carrier 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 Carrier 38YRA.
Why one should read the manuals?
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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
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Page 1
38YRA Heat Pump—Outdoor Section Installation and Start-Up Instructions NOTE: Read the entire instruction manual before starting the installation. This symbol → indicates a change since last issue. SAFETY CONSIDERATIONS Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or oth[...]
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Page 2
Install TXV kit to indoor coil as follows: 1. Install suction tube adapter. 2. Install liquid flare-to-sweat adapter. 3. Install TXV on liquid flare-to-sweat adapter. 4. Connect external equalizer tube to fitting on suction tube adapter. 5. Position sensing bulb on horizontal portion of suction tube adapter. Secure using supplied hardware. Insulate[...]
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Page 3
7. Do not suspend refrigerant tubing from joists and studs with a rigid wire or strap which comes in direct contact with the tubing. (See Fig. 3.) 8. Ensure that tubing insulation is pliable and completely sur- rounds the vapor tube. 9. When necessary, use hanger straps which are 1 in. wide and conform to the shape of the tubing insulation. (See Fi[...]
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Page 4
A brazing shield MUST be used when tubing sets are being brazed to the service valves to prevent damage to the painted unit surface. Relieve pressure and recover all refrigerant before system repair or final unit disposal to avoid personal injury or death. Use all service ports and open all flow-control devices, including solenoid valves. Do not ve[...]
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Page 5
5. Set room thermostat at HEAT or COOL and fan switch at ON or AUTO, as desired. Operate unit for 15 minutes. Check system refrigerant charge. (See Step 10.) SEQUENCE OF OPERATION — With power supplied to indoor and outdoor units, transformer is energized. Cooling On a call for cooling, the thermostat makes circuits R-O, R-Y, and R-G. Circuit R-O[...]
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Page 6
→ Fig. 9—Typical 24-v Circuit Connections A94390 FAN COIL Y/Y2 W/W1 C R 24 VAC HO T 24 VAC CO M HEAT STAGE 2 COOL/HEAT STAGE 1 INDOOR FAN CORPORATE NON-PROGRAMMABLE THERMOSTAT MODEL HP HEAT PUMP RVS COOLING NOT USED NOT USED TROUBLE OPTIONAL OUTDOOR SENSOR CONNECTION S2 S1 B Y1 R C W2 G G Y O/W2 O W2 R C L FA, FB, FC, FD, FF A95215 Y/Y2 W/W1 R [...]
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Page 7
→ Fig. 9—Typical 24-v Circuit Connections (continued) A95330 FAN COIL Y/Y2 W/W1 C R 24 VAC HO T 24 VAC CO M HEAT STAGE 2 COOL/HEAT STAGE 1 INDOOR FAN CORPORATE NON-PROGRAMMABLE THERMOSTAT MODEL HP HEAT PUMP RVS COOLING NOT USED NOT USED TROUBLE OPTIONAL OUTDOOR SENSOR CONNECTION S2 S1 B Y1 W2 G R L FK4C R W1 Y Y/Y2 G W2 C C O/W2 O O Y1 A94392 F[...]
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Page 8
WIRING DIAGRAM NOTES: 1. Underlined letter on dual terminal indicates its usage. Outdoor Temperature Sensor must be attached in all dual fuel installations. Jumper wire between O/W2 and L thermostst terminals MUST be present. 2. Y1 and O connections to 2-stage furnaces MAY NOT EXIST, or may be only a wire rather than a screw terminal. 3. Corporate [...]