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- AC-8888-107
- Service Manual
Haier AC-8888-107 Service Manual
Summary of AC-8888-107
Page 1
1 haier commercial air conditioner service manual part # ac-8888- 107 haier trading company, llc www.Haieramerica.Com.
Page 2: Commercial Air Conditioning
Commercial air conditioning service manual ● features high efficiency design hermetic compressor design haier hi-efficiency fin and copper tube design compact design of outdoor unit convenient for installation and maintenance heat pump, 10seer manual code: syjs----am-----004-0 5 ---rev. 2 edition: 2...
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Commercial air conditioner model: heat pump, 10seer units 2 contents 1. Description of products & fearures……………………..3 2.Physical and electrical specifications………………..…5 3.Safety precaution…………………………………………….……9 4.System components and functions …………………………9 5.Electrical control devices…………………………….…….1...
Page 4
Commercial air conditioner model: heat pump, 10seer units 3 1. Description of products & fearures 1.1 air conditioner this manual discusses “split” central air conditioning ,indoor coils, .”split” refers to the physical location of the major air conditioning components that are not in the same box ,...
Page 5
Commercial air conditioner model: heat pump, 10seer units 4 cabinets- constructed of powder painted and galvanized steel providing protection to the outdoor unit and a durable finish. Fig.1-2 service valves- facilitates unit servicing and provides a reliable and safe access to measure unit pressures...
Page 6
Commercial air conditioner model: heat pump, 10seer units 5 2.Physical and electrical specifications hp hr18a1var hr24a1var hr30a1var hr36a1var hr42a1var hr48a1var hr60a1var comments 1.5-ton outdoor hp 2-ton outdoor hp 2.5-ton outdoor hp 3-ton outdoor hp 3.5-ton outdoor hp 4-ton outdoor hp 5-ton out...
Page 7
Commercial air conditioner model: heat pump, 10seer units full load amps 0. 86 0. 86 1.4 1.4 1. 43 1. 43 1. 43 rated hp 1/8 1/8 1/5 1/5 1/3 1/3 1/3 nominal rpm 850 1000 1075 1075 1075 1075 1075 input watts 90.0 90.0 180.0 180.0 300 300 300 diameter (in) 18.0 18.0 18.0 18.0 22 22 22 no. Of blade 3 3 ...
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Commercial air conditioner model: heat pump, 10seer units 7 filter dry er standard standard standard standard standard standard standard full, reusable serv ice valv es y es y es y es y es y es yes yes easy serv ice access y es y es y es y es y es yes yes corrosion resistant outside screws y es y es...
Page 9: 3.Safety Precautions
Commercial air conditioner model: heat pump, 10seer units 9 3.Safety precautions caution : to ensure proper installation and operation, completely read all instructions prior to attempting to assemble ,install ,operate, maintain or repair the product. Warning:the manufacturer’s warranty does not cov...
Page 10
Commercial air conditioner model: heat pump, 10seer units 10 prevents thermostat short cycling and momentary power interruptions ,from damaging the compressor. Both compressor types are protected against over-current and over-temperature conditions. Some scroll compressors have an additional thermos...
Page 11
Commercial air conditioner model: heat pump, 10seer units 11 distributor assy fig.4-4 refrigerant circuit there are two types of outdoor coil circuiting: single and multi-circuited. The 10 series are all multi –circuits. Fig.4-5 service valves there are two types of service valve used on the air con...
Page 12: 6.Application
Commercial air conditioner model: heat pump, 10seer units 12 automatically when pressure value becomes normal . Fig.1-10 relays relays provide control switching .The voltages controlled may be either low(24v.A.C.)or line voltage. It is usually 24 volts. Contact voltage may be either low or line volt...
Page 13
Commercial air conditioner model: heat pump, 10seer units 13 the cooling load calculation determines the unit size. There are two capacities that enable the equipment to provide comfort. The first is sensible capacity. How much sensible heat can the unit remove? Sensible heat is the heat energy meas...
Page 14
Commercial air conditioner model: heat pump, 10seer units 14 piston sizes: note: the piston placed in the outdoor unit packaging box is used for indoor unit when cooling . Outdoor unit indoor coil model piston size (installed in outdoor) piston size(placed in package bag) hr18a1var hr24 a1var hr30 a...
Page 15
Figure 7 heat pump refrigerant circuit service valve service port discharge temp. Sensor indoor coil distributor service valve outdoor coil compressor service port accumulator high pressor low pressor defrosed sensor check valve orifice dryer cooling service valve service port discharge temp. Sensor...
Page 16
Commercial air conditioner model: heat pump, 10seer units 15 injury or death. This product is designed and manufactured to permit installation in accordance with national codes. It is the installer's responsibility to install the product in accordance with national codes and/or prevailing local code...
Page 17
Commercial air conditioner model: heat pump, 10seer units 16 the metal parts of the unit may be subject to rust or corrosion in adverse environmental conditions. This oxidation could shorten the unit life. Salt spray or mist in seacoast areas, sulphur or chlorine from lawn watering systems and vario...
Page 18
Commercial air conditioner model: heat pump, 10seer units 17 ! Warning - install the unit securely in a place that can bear the weight of the unit. When installed in an insufficiently strong place, the unit could fall causing injury. 8.4.Unit clearances fig. 8.--1 the minimum clearances for the unit...
Page 19
Commercial air conditioner model: heat pump, 10seer units 18 figure a figure b figure c fig. 8-2 only refrigeration-grade copper piping (dehydrated and sealed) should be used. Take extreme care to keep the refrigerant tubing clean and dry prior to and during installation . If in doubt, blow out the ...
Page 20
Commercial air conditioner model: heat pump, 10seer units 19 undesirable heat transfer resulting in capacity loss and increased power consumption. Refrigerant line sizing check the following table ( table 8-1 ) for correct suction and liquid line sizes for any combination of the unit size and the ma...
Page 21
Commercial air conditioner model: heat pump, 10seer units 20 3.Push the tubing into the fitting until it stops. This prevents flux from getting into the system. 4.Remove the cap and schrader valve core from the service port to protect the valve seals. 5.Wrap a wet rag around the valve stub before br...
Page 22
Commercial air conditioner model: heat pump, 10seer units 21 system superheat return air temperature ( ) ℉ ambient temperature at condenser inlet ( ) ℉ 65 70 75 80 85 60 17 25 30 33 37 65 13 19 26 32 35 70 5 14 20 28 32 75 5 10 17 25 29 80 5 12 21 26 85 5 10 17 20 90 7 12 18 95 5 5 5 100 5 5 table 8...
Page 23
Commercial air conditioner model: heat pump, 10seer units 22 table8-3: minimum wire size based on n.E.C. For 60 c type copper conductors below 100 ampacity. The owner should be made familiar with the location of the over-current protection, the proper size for this application and the proper procedu...
Page 24
Commercial air conditioner model: heat pump, 10seer units 23 8.9 indoor unit installation unit dimensions a. For hb***m20 air handler fig. 8--3.
Page 25
Commercial air conditioner model: heat pump, 10seer units 24 b. For hb***m25 air handler d c primary & secondary condensate drains- horizontal 3/4" npt 2.00" [5.08 cm] 5.12" [13 cm] 2.00" [5.08 cm] typical f k g 1.125" [2.9 cm] 5.00" [12.7 cm] h 1.188" [3.02 cm] 2.375" [6.03 cm] 1.188" [3.02 cm] inl...
Page 26
Commercial air conditioner model: heat pump, 10seer units 25 before installing this appliance insure that it is properly sized and adequate power is available. This appliance can be installed in the vertical or right horizontal position without modification. The horizontal left and downflow position...
Page 27
Commercial air conditioner model: heat pump, 10seer units 26 fig.8-4 horizontal left-hand instructions important: read instructions below carefully. Fig.8-5 1) with air handler in the vertical position, remove all three access panels. 2) remove j-shape metal bracket. Slide out from the air handler c...
Page 28
Commercial air conditioner model: heat pump, 10seer units 27 knockout only if this drain is required in this particular installation. Warning: if incorrect knockouts are removed, flooding will occur. 5) reinstall in the air handler , the "a" coil pan assembly with the horizontal drain pan on the lef...
Page 29
Commercial air conditioner model: heat pump, 10seer units 28 fig.8-7 7. The "hb" coils are shipped with a check flowrator for use with either cooling or heat pump outdoor section which is accessible from the outside of the unit. Warning: the "a" coil contains 150 p.S.I.G. Of air pressure before sett...
Page 30
Commercial air conditioner model: heat pump, 10seer units 29 this appliance employs a draw-through coil, therefore a trap must be installed in the drain line(s) to allow for proper condensate disposal. The condensate trap must not be the "running" type, or "r" type. A "p " trap is required. The tota...
Page 31
30 a means of strain relief must be installed to this appliance at the electrical service entrance. When an optional electric heat kit is installed refer to the electrical requirements for that kit. The ampacity and over-current protection shown above is onl y for "hb" air handlers installed without...
Page 32: 9.Maintenance Instructions
Commercial air conditioner model: heat pump, 10seer units 31 4. This warm ,high pressure liquid leaves the outdoor coil ,and flows through the small copper refrigerant liquid line. 5. At the end of the liquid line the refrigerant passes through the a flowcheck device ,reducing a pressure and tempera...
Page 33
Commercial air conditioner model: heat pump, 10seer units 32 a. First turn off electrical power to the outdoor unit b. Remove the top with the outdoor fan attached. C. Flush water through the coil from the inside out. Note: do not to get water on any controls or other electrical devices. If anything...
Page 34
Commercial air conditioner model: heat pump, 10seer units 33 a system and safely stores it in a department of transportation (dot) approved container until it is re-used or returned for reclaim. The authors of the epa regulations enforcing the clean air act realized that an accidental release of the...
Page 35
Commercial air conditioner model: heat pump, 10seer units 34 ………….Correct control voltage ………….Proper disconnect switches and breakers for indoor and outdoor units ………….Correct wire sides for both indoor and outdoor units. Outdoor unit installation ………….Unit level with proper clearances for air flow...
Page 36
Commercial air conditioner model: heat pump, 10seer units 35 run capacitor fig.10-2 some compressor require the assistance of an additional potential relay to start. The potential relay connect to the contactor. The potential use two terminals:5 and 2 ;the relay coil that opens them is between termi...
Page 37
Commercial air conditioner model: heat pump, 10seer units 36 electrical characteristics. Condenser fan blade location dimension “a” will be from 2” to 4” depending on the unit model number. Be sure to check this dimension before removing the fan blade. Note: when parts combination results in motor /...
Page 38
Commercial air conditioner model: heat pump, 10seer units 37 drop tables are available ,they indicate the cubic feet of air per minute(cfm) moving through the coil .An inclined manometer is an example of this type of instrument. A velometer measures the velocity of the air in feet per minute(fpm). I...
Page 39
Commercial air conditioner model: heat pump, 10seer units 38 b. Measure from start terminal to common terminal. .Middle ohm value of the three measurements. .Approximately 2.0 to 3.0 ohms c. Measure from start terminal to run terminal. .Highest ohm value of the three measurements. .Approximately the...
Page 40
Commercial air conditioner model: heat pump, 10seer units 39 a. Suction pressure holds. Normal condition. B. Suction pressure rises to a point and stops. . Some refrigerant finally evaporated in the coil and made its pressure felt on the gauge . Normal condition .Do not start the compressor to force...
Page 41
Commercial air conditioner model: heat pump, 10seer units 40 and moisture. Action: remove and recover the refrigerant .Evacuate the system charge with fresh ,clean refrigerant. B. The system pressure is below the chart pressure. Cause :a mixed refrigerant is present . Action: remove and recover the ...
Page 42: 10.3Troubleshooting Guide
Commercial air conditioner model: heat pump, 10seer units 41 .Break each vacuum with dry nitrogen to 3.0 psi. Use the largest connections and hoses possible to expedite the process. J. Charge with clean ,new or reclaimed r-22 refrigerant .Charge in accordance with proper charging procedures. K. Chec...
Page 43
Commercial air conditioner model: heat pump, 10seer units 42 run or start capacitor defective replace loose connection check and tighten all connections. Compressor stuck, grounded or open motor winding, open internal overload wait for 2 hours for overload to reset. Replace compressor if still open....
Page 44: Heat Pump Wiring Diagram
11. Wiring diagram continuous on - 24vac supplied to y terminal of defrost control. Flash on/off - system in defrost operation. 1/2+1/2 1 flash - pipe/coil sensor open or short circuit. 1/2+1/2 2 flash - vent/suction sensor short circuit. 1/2+1/2 3 flash - lps & hps open circuit. 1/2+1/2 4 flash - c...
Page 45: Sincere Forever
Commercial air conditioner model: heat pump, 10seer units 52 sincere forever haier group haier industrial park, no.1, haier road 266101, qingdao, china http://www.Haier.Com.