Friedrich KUHL R-410A manual

Se rv i c e M an u al Stan dard C ha ssis R - 41 0A Models R o o m A i r C o n d it i o n e rs 11 5 - Volt : 208-230 - V ol t: Cool On ly SS08M10 , SS 10M1 0, SS12M 10, SS 14 M1 0 SS12 M30, SS15M30, S M18M30, S M2 1M30 S M2 4M30, S L 28M30, S L 36M30 Cool with E lec tric Heat 208-230 - V ol t: ES12M33 , ES15M33 , EM 18M34, EM2 4M35, E L 3 6M35 Heat[...]

1 T able Of Contents Important Safety Information ..................................................................................................................................... 2-4 Introduction .....................................................................................................................................................[...]

2 IMPORT AN T S AF ET Y INF ORMA TION The infor mation cont ained in this manual is intended for use by a quali fi ed ser vice tec hnician who is familiar with the s a fety pro cedures required for inst allation and repair , and who is equipped wi th the proper tools and test instr umen ts required to ser vice t his product. Installatio n or repai[...]

3 D • o not spray or pour water on the return air gr ille , discharge air grille, evaporator co il , contro l panel , and sleev e on the room si de of the air conditioning unit w hile cleaning. E • lectr ical comp onent malfunction c a used by water could result in electr ic shock or other electr ically unsafe co nditions when the power is rest[...]

4 P R O P E R TY D A MA G E H AZAR D S FIRE D AMA GE HA Z ARD S : R • ead the Installatio n/Operatio n Manual for the air co nditioning unit prior to o perating. U • se air conditi oner on a single dedicated circ uit within the speci fi ed amperage rating . Connec t to a properly grounded outlet only . • D • o not remove ground prong of pl[...]

5 This service manual is designed to be used in conjunction with the installation and operation manuals provided with each air conditioning system. This service manual was written to assist the professional RAC (Room Air Conditioner) service technician to quickly and accurately diagnose and repair malfunctions. This manual will deal with subjects i[...]

6 Serial Number Decade Manufactured L=0 C=3 F=6 J=9 A=1 D=4 G=7 B=2 E=5 H=8 A K A R 00001 Production Run Number Y ear Manufactured A=1 D=4 G=7 K=0 B=2 E=5 H=8 C=3 F=6 J=9 Product Line R = RAC Month Manufactured A=Jan D=Apr G=Jul K=Oct B=Feb E=May H=Aug L=Nov C=Mar F=Jun J=Sept M=Dec 1st Digit – Function S = Straight Cool, V alue Series Y = Heat P[...]

7              E NERGY S TA R ® quali fi ed Model Cooling Capacity Btu Heating Capacity Btu V olts Rated Cooling Amps Cooling W atts Heating Amps Heating W atts COP Energy Ef fi ciency Ratio EER Estimated Y early Operating Cost Moisture Removal Pints/HR Room Side Air Circulation CFM Sleeve Net Weight Lbs K [...]

8 Installation Information / Sleeve Dimensions * Mi nimum ex tens ions w hen mo unted in a w indo w . ** M inim um widt hs ach ieved us ing one s ide cu rt ain as sembl y as opp osed to b oth in a st anda rd inst alla tion. NOT E: S,M and L s leeves m ay be inst alle d in win dow wit h no sid e kits i f prop erly i nsta lled. Circuit Rating/ Breake[...]

9 ELE CTRI CAL D A T A ELECTRIC SHOCK HAZARD W ARNING T urn off electric power before service or installation. All el ectric al connec tions and wir ing MUST be installed by a quali fi ed elec tric ian and confor m to the Nati onal Electr ical Code and all l ocal c odes which hav e jurisdiction. F a i lu r e t o d o s o ca n r es u l t i n p e rs [...]

10 Mak e sure t he wiri ng is ad equ ate for yo ur un it. I f y o u h a v e f u s e s , t h e y s h o u l d b e o f t h e t i m e d e l a y t y p e . B e f o r e y o u i n s t a l l or relocate this unit, be sure that the amperage rating of the circuit breaker or time dela y fuse does not e xceed the amp rating listed in T able 1 . DO NO T use an e[...]

11 Let’s check out how to control y our air conditioner. On the c ontrol panel, just to the le ft of the PO WER , is a liquid cr ystal display (LCD ). All of the cont rol panel funct ion buttons and m ode icons c an be viewed in Figure 1. Powe r On – Pr ess the b u t t o n t o t u r n o n t h e a i r c o n d i t i o n e r . T h e power button w[...]

12 CHECK FIL TER appears on screen. T he word “ ” appears next to t he . n o t t u b The alert is issued when t he fan run . s r u o h 0 0 5 n a h t r e t a e r g s i e m i t This aler t may be rese t by the user (Refer to Special F unctions, Filter Reset ). Maintenance Requ ired – When maintenance is required, a ser vice icon a p p e ar s o [...]

13 User presses or to toggle between Beep On and Beep Off. Press the key to accept the change and exit the selection process. SYSTEM FA N MODE FA N SPEED SCHEDULE BACK DISPLA Y ENTER EXIT Audible Alerts – Y ou c an select to have the c ontrol be ep when entering menus. When B EEP is displa yed pre ss the key then pres s (U P ) or (DO WN ) t o t o[...]

14 Fr ee ze Pro te c ti on – The Kühl+ models have a spec ial feature that is designed to keep the interior spac e above freezing b y energizing the electric heater anytime the indoor room tempera ture falls to 40° F (4 ° C) . With the freeze protection fea ture turned on, when the un it senses the indoor temp erature fall to 40 ° F ( 4° C) [...]

15 Remote Con t rol Opera tion Remote Control – Refer to Fig ures 1 1 and 1 2 during op eration des criptio n. Getting Sta r ted – Inst all two (2) AA A batter ies in the batter y compar tment loc ated on the back of the unit . Operation – T h e r e m o t e c o n t r o l s h o u l d b e w i t h i n 2 5 f e e t o f t h e a i r conditioner for [...]

16 Remote Control Operation (Continued) FRR005 SYSTEM TEMPERA TURE UP SCHEDULE DISPLA Y F AN MODE POWER TEMPERA TURE DOWN F AN SPEED FRR006 AUTO ICON SYSTEM MODE FA N MODE FA N SPEED SCHEDULE ICON 2 X 16 SEGMENT DISPLA Y COOL ICON HEA T ICON F AN ONL Y ICON °F / °C ICONs Fig ure 1 Fig ure 2[...]

17 ELECTR ONIC CONTROL SY STEM MAINTENANCE Display Introduction This section contains information on the maintenance alerts, temperature limiting, diagnostic test and how to access. The elect ronic control system has a built in maintenance sub system which works constantly behind the scenes to help identify problems with the air conditioner or cont[...]

18 Electronic Control Sy stem Maintenance Operation To Enter the Maintenance Section: Press SYSTEM+SCHEDULE+BACK+DISPLAY/ENTER for 6 seconds. There are 5 maintenance sub-menus M1 through M5 . Maintenance Sub-Menus Access M1 – Temperature High Limit Service Onl y M2 – Temperature Low Limit Service Onl y M3 – Test Mode Access Service Onl y M4 ?[...]

19 Temperature High Limit Temperature Low Limit M3 – Test Mode A cce ss Maintenance function 1 is ready to be selected. Press DISPLA Y/ENTER to access the function. User presses  or  to increment or decrement the upper temperature limit. 99°F is the maximum upper limit. The current stored high limit is displayed when the screen is selected[...]

20 M4 – Switch A ccess (Unit Configuration) FACTORY USE ONLY M6 – Factory Use Only M5 – Error Codes & History Error Code Number of Errors Error Code On/Off Maintenance funtion 5 is ready to be selected. Press DISPLA Y/ENTER to access the function. The error code display shows the error code number on the left, and the error code history o[...]

21 UNIT OPERA TION There are two basic ways to operate the unit - Front Panel and Wallstat. The Front Panel and Wallstat are never active at the same time. Switching between these modes is controlled via the (FP) jumper on the Wallstat connector. When the jumper is ON, the mode = Front Panel. Front Panel System Mode Sequence (SCHEDULE = OFF) There [...]

22 System Set Point Mapping Figure The air conditioner control system is designed to control different product configurations with a select set of features. Some models just cool, some cool and heat with electric heat, and others cool and heat with a heat pump and/or electric heat. The system set points are mapped to the internal controls as shown [...]

23 ELECTR ONIC CONTROL SEQUENCE OF OPERA TION Compressor and R e v ersing V alve Control Cooling D e- Energiz ed Ener gized On On Off Off Heat - Hea t Pu mp Heat - Electric Fa n O n ly * The Reversing valve stays in the last state until a c all for heat or c ooling ( se e fi gure below ) Compressor Operation: Cooling Mode Onc e the ambient tempera[...]

24 Hea t Control (H eat Pump On ly ) Heating Mod e C ontrol Operat ion There are t wo heating methods: Heat Pump and Electric Resist ance Heat. There are 3 t ypes of units that provide heating: Heat Pump O nly (Model YS 10M 1 0 ) Heat Pump with Elec tric Heat and C ool with Electr ic Heat. Heat Control Operat ion Heat P ump Only Onc e the ambient t[...]

25 This heating is more c omplex due to the possibilit y of two heating metho ds. If the ambient indoor temperature is be- low the heat demand threshol d ( 1.5 ˚ F below the heat set point temperature ), and the c ompressor is not locked out, turn on c ompressor . If the ambient indoor temp erature is 0.25 ˚ F abov e the heat set point turn of f [...]

26 Condition 2 If the Δ (delta ) (set point temperature minus the ambi ent indoor temperature ) is greater than 5 ˚ F , then the unit will sw itch to elec tric heat, if available. The unit wi ll continue to o perate with elec tric heat until t he heat demand is satis fi ed. Note t hat the ele ctri c heat switches on af ter the Δ temp pas ses 5?[...]

27 Compress or Lock Out Time The lockout feature ensures that the c ompressor is de - energiz ed for a per iod of time. The timer varies randomly from 180 to 240 seconds The c ompressor lockout is initiated every t ime the compress or is “off ” due to: ( 1 ) Satisf ying the temperature set point ( 2 ) Changing mode to fan only or heat ( 3 ) T u[...]

28 F an Op eration (F ront Panel Mode ) Heat – C ool – Auto – Fan Only Mode ls star ting with SS, SM have 4 speeds. Mo dels with SL, and all Kuhl+ have 3 speeds Note that in t he A UTO mode, the speed of th e fan will be shown by illuminating the number of bar s in the speed tr iangle. Speed Selection 1 2 3 4 AUTO Continuous "On" &q[...]

29 UNIT OPER A TION WITH A W A L L- S T A T F ront Panel Displa y Operation in Wall- Stat Mode The indoor ambient temperature sensor is disable d . All but tons are disabled with the follow ing e xce p tion: A . Maintenance commands. B. The user menu for Freeze protection (Display/Ent er butto n for Kuhl+ only units ). C. First Button push to illum[...]

30 Remove the decorative front cover by using the tool provided (see fi gure below). T ighten the four (4) captive screws as indicated by the arrows in the fi gure above before closing the front panel (do not over tighten) . Ensure the fi lter is in place. Make sure curtains do not block the side air intake Notes on reattaching the decorative fr[...]

31 REPLACING THE INDOOR COIL THERMIST OR REPLACING THE CONTROL BOARD ELECTRIC SHOCK HAZARD W ARNING Disconnect power to the unit before servicing. Failure to follow this warning could result in serious injury or death. Remove the decorative front cover (see page 30). Remove all indicated screws below (8 total, see fi gure below). Remove the Discha[...]

32 ELECTRIC SHOCK HAZARD W ARNING Disconnect power to the unit before servicing. Failure to follow this warning could result in serious injury or death. L ow V oltag e I nt erf a ce Con ne ctor All Kuh l and Kuhl + units h a ve a low volt age inter face co nnector thr ough whic h a Remote Wall Therm ostat, Desk C ontrol and Au xiliar y F an’ s Re[...]

33 Remote Wall T h ermos tat L oca t ion The th ermost at should not be m ounted where it may be af fecte d b y draf ts, discha rge air from re gisters (hot or c old), or heat radiated f rom the sun applianc es, windows etc . . The th ermostat s hould be loc ated about 5 Ft. above the fl oor in a n area of average te mperatur e, with goo d air cir[...]

34 CAP ACIT ORS ELECTRIC SHOCK HAZARD W ARNING T urn off electric power before servicing. Discharge capacitor with a 20,000 Ohm 2 W att resistor before handling. Failure to do so may result in personal injury , or death. Many motor capacitors are internally fused. Shorting the terminals will blow the fuse, ruining the capacitor . A 20,000 ohm 2 wat[...]

35 HEA TING ELEMENT All heat pumps and electric heat models are equipped with a heating element with the exception of model YS10M10. The other “YS” and “ES” models are equipped with a 3.3 KW element. The “YM” and “EM” models are equipped with a 4.0 KW element. The “YL” and “EL” models are equipped with a 5.2 KW element. The [...]

36 Suction Line Evaporator Coil Metering Device Refrigerant Strainer Discharge Line Condenser Coil Compressor Refrigerant Drier Liquid Line A good understanding of the basic operation of the refrigeration system is essential for the service technician. Without this understanding, accurate troubleshooting of refrigeration system problems will be mor[...]

37 • R-410A pressure is approximately 60% higher than R-22 pressure. • R-410A cylinders must not be allowed to exceed 125 F , they may leak or rupture. • R-410A must never be pressurized with a mixture of air , it may become fl ammable. • Servicing equipment and components must be speci fi cally designed for use with R-410A and dedicated [...]

38 Proper refrigerant charge is essential to proper unit operation. Operating a unit with an improper refrigerant charge will result in reduced performance (capacity) and/or ef fi ciency . Accordingly , the use of proper charging methods during servicing will insure that the unit is functioning as designed and that its compressor will not be damag[...]

39 3. Install a process tube to sealed system. 4. Make necessary repairs to system. 5. Evacuate system to 200 microns or less. 6. Weigh in refrigerant with the property quantity of R-410A refrigerant. 7. Start unit, and verify performance. 8. Crimp the process tube and solder the end shut. Proper safety procedures must be followed, and proper prote[...]

40 Underchar ged R efriger ant Systems An undercharged system will result in poor performance (low pressures, etc.) in both the heating and cooling cycle. Whenever you service a unit with an undercharge of refrigerant, always suspect a leak. The leak must be repaired before charging the unit. T o check for an undercharged system, turn the unit on, [...]

41 R estricted R efrigerant System T roubleshooting a restricted refrigerant system can be dif fi cult. The following procedures are the more common problems and solutions to these problems. There are two types of refrigerant restrictions: Partial restrictions and complete restrictions. A partial restriction allows some of the refrigerant to circu[...]

42 METERING DEVICE Capillar y T ube Systems All units are equipped with capillary tube metering devices. Checking for restricted capillary tubes. 1. Connect pressure gauges to unit. 2. Start the unit in the cooling mode. If after a few minutes of operation the pressures are normal, the check valve and the cooling capillary are not restricted. 3. Sw[...]

43 NOTE: System operating pressures must be near normal before valve can shift . REVERSING V AL VE DESCRIPTION/OPERA TION The Reversing V alve controls the direction of refrigerant fl ow to the indoor and outdoor coils. It consists of a pressure-operated, main valve and a pilot valve actuated by a solenoid plunger . The solenoid is energized durin[...]

44 Reversing V alve in Heating Mode TESTING THE REVERSING V AL VE SOLENOID COIL The solenoid coil is an electromagnetic type coil mounted on the reversing valve and is energized during the operation of the compressor in the heating cycle. 1. T urn off high voltage electrical power to unit. 2. Unplug line voltage lead from reversing valve coil. 3. C[...]

45 8. Pressurize sealed system with a combination of R-410A and nitrogen and check for leaks, using a suitable leak detector . Recover refrigerant per EP A guidelines. 9. Once the sealed system is leak free, install solenoid coil on new valve and charge the sealed system by weighing in the proper amount and type of refrigerant as shown on rating pl[...]

46 Lock ed R otor V olta ge (L.R.V .) T est Locked rotor voltage (L.R.V .) is the actual voltage available at the compressor under a stalled condition. Single Phase Connections Disconnect power from unit. Using a voltmeter , attach one lead of the meter to the run “R” terminal on the compressor and the other lead to the common “C” terminal [...]

47 Single Phase Resistance T est t e s d n a s l a n i m r e t r o s s e r p m o c e h t m o r f s d a e l e h t e v o m e R the ohmmeter on the lowest scale (R x 1). n o m m o c s l a n i m r e t m o r f r e t e m m h o e h t f o s d a e l e h t h c u o T r e t e m m h o e h t f o s d a e l e h t h c u o t , t x e N . ) ” S “ o t ” C “ ( t[...]

48 R ecommended procedur e f or compressor replacement 1. Be certain to perform all necessary electrical and refrigeration tests to be sure the compressor is actually defective before replacing. 2. Recover all refrigerant from the system though the process tubes. PROPER HANDLING OF RECOVERED REFRIGERANT ACCORDING TO EP A REGULA TIONS IS REQUIRED. D[...]

49 1. 2. 3. 4. 5. ELECTRIC SHOCK HAZARD W ARNING T urn off electric power before service or installation. Failure to do so may result in personal injury , or death. Sealed Refrigeration System contains refrigerant and oil under high pressure. Proper safety procedures must be followed, and proper protective clothing must be worn when working with re[...]

50 R OUTINE MAINTENANCE COILS AND BASE P AN The indoor coil (evaporator coil), the outdoor coil (condenser coil) and base pan should be inspected periodically (yearly or bi-yearly) and cleaned of all debris (lint, dirt, leaves, paper , etc.). Clean the coils and base pan with a soft brush and compressed air or vacuum. If using a pressure washer , b[...]

51 SLEEVE / DRAIN Inspect the sleeve and drain system periodically (at least yearly or bi-yearly) and clean of all obstructions and debris. Clean both areas with an antibacterial and antifungal cleaner . Rinse both items thoroughly with water and ensure that the drain outlets are operating correctly . Check the sealant around the sleeve and reseal [...]

52 R OUTINE MAINTENANCE (Continued) Standard Filter Cleaning Installat ion Instruc tions STEP 1. FIL TER FIL TER GRIP STEP 3. Sw ing the front f rame open. Clean t he front fram e b y washing STEP 2. NOTE: HANDLE FIL TER GRIP TOP T AB FRONT FRAME WITH ST ANDARD MESH FIL TER A Figure 1 Figure 3 Figure 4 Figure 2 STEP 4. NOTE: the t ab in the frame s[...]

53  Ensure th at the circuit br eaker( s) or fuse(s ) and supply ci rcuit wire size have been si zed corr ectly . If the unit was sup plied with a p ower supply c ord, insure that it is stored pr operly.  Ensure th at the en tire ins tallation is in compliance with all applicable nationa l and loc al code s and ordinances having jur isdicti o[...]

54 Service an d A ssis tan ce Before c alling for se rvic e, please che ck the “T rouble shooting Ti ps” section on page s 40 and 4 1. This may help you to fi nd the answer to your proble m, avoid unnec essar y ser vice c alls, and save you the c ost of a ser vice c all if the pr oblem is not due to t he product it self. If you have checked t [...]

55 ROOM AIR CONDITIONER UNIT PERFORMANCE TEST DATA SHEET JOB NAME _____________ __________ ______ ___ TECHS NAME_______ ________ _______ _________ _____ DATE: ______________ _ MO DEL:_______ ________ SER IAL:_________ ______ _ HOW IS ALL OF THE INSTALLATION? GOOD B AD YES NO I S A C H A S S IS S E A L G A S K E T IN T A L L E D ? I S T H E F RESH /[...]

56 Error Code Maintenance ICON Problem Control Board's A ction 1F l a s h Front Panel Button Stuck For More Than 20 Seconds Continue to monitor f or "OPEN" (Unstuck ) switch. Do not process switch input. ENSURE FRONT COVER DOES NOT DEPRESS BUTT ONS 2F l a s h Input Voltage Out of Specif ication (103 - 127 / 187 - 253 ) Stop.Open all [...]

57 Problem Possible Cause Possible Solution Unit does not operate. The unit is turned to the off position, T urn the unit to the on position and raise or lower temperature setting (as appropriate) to call for operation. The LCDI power cord is unplugged. Plug into a properly grounded 3 prong receptacle. See “Electrical Rating T ables” on pg. 6 f[...]

58 Problem Possible Cause Possible Solution Unit Does Not Cool/Heat On And Off T oo Frequently (continued). The outside temperature is below 60° F (16° C). Do not try to operate your air conditioner in the cooling mode when the outside temperature is below 60° F (16° C). The unit will not cool properly , and the unit may be damaged. The digital[...]

59 COOLING ONL Y ROOM AIR CONDITIONERS: TR OUBLESHOOTING TIPS e s u a C e l b i s s o P m e l b o r P Compressor does not run Low voltage Check voltage at compressor . 1 15V & 230V units will operate at 10% voltage variance T emperature not set cold enough or room air thermistor inoperative Set temperature to lower than ambient position. Test t[...]

60 COOLING ONL Y ROOM AIR CONDITIONERS: TR OUBLESHOOTING TIPS Possible Solution e s u a C e l b i s s o P m e l b o r P Unit does not run Fuse blown or circuit tripped Replace fuse, reset breaker . If repeats, check fuse or breaker size. Check for shorts in unit wiring & components Power cord not plugged in Plug it in System button in “OFF”[...]

61 COOLING ONL Y ROOM AIR CONDITIONERS: TR OUBLESHOOTING TIPS Possible Solution e s u a C e l b i s s o P m e l b o r P Compressor runs for short periods only . Cycles on overload Overload inoperative. Opens too soon Check operation of unit. Replace overload if system operation is satisfactory Compressor restarted before system pressures equalized [...]

62 COOLING ONL Y ROOM AIR CONDITIONERS: TR OUBLESHOOTING TIPS e s u a C e l b i s s o P m e l b o r P W ater “spitting” into room Sublimation: When unconditioned saturated, outside air mixes with conditioned air , condensation forms on the cooler surfaces Ensure that foam gaskets are installed in between window panes & in between the unit &[...]

63 HEA T / COOL ONL Y ROOM AIR CONDITIONERS: TROUBLESHOO TING TIPS Possible Solution Possible Solution e s u a C e l b i s s o P m e l b o r P Room temperature uneven (Heating cycle) Check error codes. Replace as needed. Bad indoor ambient thermistor Set at higher fan speed. Fan speed too low Close doors, windows, etc. Opened door, windows, etc. En[...]

64 n o i t c A e s u a C e l b i s s o P m e l b o r P Unit cools when heat is called for Incorrect wiring Refer to applicable wiring diagram Defective solenoid coil Check for continuity of coil Reversing valve fails to shift Block condenser coil & switch unit to cooling. Allow pressure to build up in system, then switch to heating. If valve fa[...]

65 HEA T PUMP ROOM AIR CONDITIONERS: TR OUBLE SHOO TING TIPS ELECTRICAL TROUBLESHOO TING CHART - HEA T PUMP Reversing V alve Stuck Replace the Reversing V alve Replace the Solenoid Coil NO Is the Solenoid Coil Good? Is Line V oltage Present at the Solenoid Is the Selector Switch Set for Heat? NO SYSTEM COOLS WHEN HEA TING IS DESIRED. YES HEA T PUMP[...]

66 DISCHARGE TUBE SUCTION TUBE to T ube to OUTSIDE from Compressor T ube to INSIDE Capillary T ube Capillary T ube Compressor RIGHT Pilot LEFT Pilot COIL COIL 14 NORMAL FUNCTION OF V AL VE V AL VE OPERA TING DISCHARGE TUBE from Compressor SUCTION TUBE to Compressor Tube to INSIDE COIL Tube to OUTSIDE COIL LEFT Pilot Capillary Tube RIGHT Pilot Capil[...]

67 ELECTRONIC CONTR OL BO ARD COMPONENTS IDENTIFICA TION Fr on t Sam ple b oard fo r Kuhl+ uni t Back Reversing Valve Max Speed High Speed Med Speed Low Speed T-stat Terminals Transformer v oltage Selector Switch 115/230 Vol ts Battery Compartmen t User Interface connector Transformer 115/230 Vol ts DISCHARGE[...]

68 REMO TE WALL THERMOST A T WIRING DIAGRAMS LEGEND FO R TST A T WI R ING H AR NESS C Common T erminal GH Call for High F an GL Call for L ow F an B Reversing V alve Y Coil for Cooling W Call for Heat R 24 V A C P ower F rom Unit RT5 - T wo Speeds F an T -Stat - F ield Pro vided -- -- -- F ield Wiring COOL WITH ELECTRIC HEA T Jumper Wire GH GL O[...]

69 KUHL ELECTRONIC CONTR OL COOL ONL Y MODELS SS08M10A, SS10M10A, SS12M10A, SS14M10A SS12M30A, SS15M30A SM18M30A, SM21M30A, SM24M30A HIGH MAX MEDIUM R S R S C COMPRESSOR ELECTRONIC CONTROL L1 F4 F3 F1 NEUTRAL (115 V) 92170000 COMP L1 L2 OR N 4 3 1 5 BLAC K LOW F2 2 OLP BLACK COMPRESSOR BLUE RED S R C BLAC K CAPACITOR BRACKET RED BLUE TO CHASSIS GRE[...]

70 KUHL ELECTRONIC CONTR OL COOL ONL Y MODELS SL28M30A, SL36M30A WIRING DIAGRAM SCHEMATIC HIGH MEDIUM R S R S C COMPRESSOR C S R F A N C O M H E R M ELECTRONIC CO NTROL L1 F3 F1 NEUTRAL OLP FAN MTR CAP FAN COM OLP COMPRESS OR HERM CAP COM (230/208 V ) L2 (115 V) 92170001 COMP L1 U S E R I N T E R F A C E GREEN TO CHASSIS CAPACITOR BLUE BRACKET RED [...]

71 KUHL+ ELECTRONIC CONTR OL COOL WITH ELECTRIC HEA T MODELS ES12M33A, ES15M33A EM18M34A, EM24M34A BLACK ORANGE UI HOLDE R ELECTRONIC S ASY BLACK BLUE HEATER BLACK COMPRESSOR S OLP R C BLUE RED BLACK RED BRACKET CAPACITOR BLUE TO CHASSIS GREEN O R G R E E N /Y E L L O W BRACKET TO CAPACITOR G R E E N SUPPLY CORD U S E R I N T E R F A C E OLP FAN M [...]

72 KUHL+ ELECTRONIC CONTR OL COOL WITH ELECTRIC HEA T MODEL EL36M35A     L2 HIGH F1 F2 1 R S L2 (230/ 208 V) NE UT R AL CO M P EL EC TRI C H EA T C EH 1 ME DIU M LOW EL EC TRI C H EA T F3 CO M PRESSO R 3 2 5 6 S R L1 L1         (115 V ) W I RI N G D I A GRA M U I H O L D ER EL EC TRO[...]

73 KUHL+ ELECTRONIC CONTR OL HEA T PUMP ONL Y MODEL Y S10M10A SCHE MATI C MEDIUM HIGH LOW R S R S C COMPRESSOR ELE CTRO NIC CO NTROL L1 F3 F2 F1 NEUT RAL (230/208 V) L2 (115 V) 92170003 COMP L1 U S E R I N T E R F A C E HP L2 OR N 3 2 1 6 5 REVERSE CYCLE RV F A N RED BLACK ORANG E BLACK H E R M WIRING DIAGRAM WHITE SUPPLY CORD TO CAPACITOR BRACKET [...]

74 KUHL+ ELECTRONIC CONTR OL HEA T PUMP WITH ELECTRIC HEA T MODELS Y S12M33A, YM18M34A SCHEMATIC 921700 04 ELECTRIC HE AT ELECTRIC HE AT COMPR ESSOR MEDIUM HIGH LOW R S REVERSING CYCLE R S C ELECT RONIC CONTR OL EH1 2 3 L1 L1 F3 TF F2 F1 HTR EH2 1 6 7 5 U S E R I N T E R F A C E COMP HL RV 8 L2 R COMPRESSOR BLACK S OLP BLUE RED C BLAC K COIL, SOLEN[...]

75 KUHL+ ELECTRONIC CONTR OL HEA T PUMP WITH ELECTRIC HEA T MODEL YL24M35A 2 1 4 3 X X X O X O OO X O O OX XO O O O O O O O O O O O O O O X X O HI FAN O O X OO O OO O O X MED FAN LOW F AN O X O O O O X OO HI HEAT (HP) O O MED HEAT (HP) LOW HEAT (HP) XO O 0X OFF HI COOL MED COOL SWITC H POSIT ION X X HI HEAT (EH) MED HEAT (EH) LOW H EAT (E H) X O O [...]

76 THERMIST ORS’ RESIST ANCE V ALUES (This T able Applies to All Thermistors ) TEMP INDOOR AIR SENSOR RESISTENCE (K Ohms) RESISTANCE TOLERANCE % F MIN CE NTR MAX MIN MAX -25 210.889 225.548 240.224 6.50 6.51 -20 178.952 190.889 202.825 6.25 6.25 -15 151.591 161.325 171.059 6. 03 6.03 -10 128.434 136.363 144.292 5.81 5.81 -5 108.886 115.340 121.79[...]

77 Replacement Remo te Control Configuration Instructions For Use with Küh l (cool only models) and Kühl + (cool & h eat models) Contents: • Remote Contro l with H older • (2) AAA-batterie s • Instru ction Sheet ATTENTION! – You M ay Need to Confi gur e The R eplacemen t Remote Contr ol Please read i nstructions com pletely before a t[...]

78 Kühl Remote Control Step 4 Che cking the Remote Cont rol’s OPT # Code W it h the Remot e Control’s display illuminat ed, press an d hold the R emote Cont rol’s SCHEDULE and the F A N SPEED Keys simultane ously for approximatel y 6 seconds until the Remote Co ntrol display s its current OPT# Code . If the OPT # Code is different than the A[...]

79 Kühl User Interface Service Kit Replacement Instructions For Use with Kühl (cool only models) and Kühl + (cool and heat models) ATTENTION! - Please read these instructions complete ly before attempting replacement. Always unplug the power supply from the power supply receptacle. Contents: • User Interface (UI) • Ribbon Cable • 2 – Mou[...]

80 INSTR UCTIONS F OR USING COOLING LO AD ESTIMA TE FO R M FO R RO O M A I R C O N DI TI ON E R S (AHAM PUB. NO. RAC-1) A. This cooling load estimate form is suitable for estimating the cooling load for comfort air conditioning installations which do not require specifi c conditions of inside temperature and humidity . B. The form is based on an o[...]

81 COOLING L O A D EST IM A TE F ORM HEA T GAIN FROM 1. WINDOWS: Heat gain from the sun. Northeast East Southeast South Southwest West Northwest North 2. WINDOWS: Heat by conduction (T otal of all windows.) Single glass Double glass or glass block 3. W ALLS: (Based on linear feet of wall) a. Outside walls North Exposure Other than North exposure b.[...]

82 Following is a n e xamp le using th e heat load fo rm: A space to be c onditioned is part of a house geographic ally located in an area w here the lowest outdoor ambient win ter temperature is 40°F . The c alculated heat loss is 1 8 4 BTU/ Hr . /°F . Subtract 40 °F (lowest outdoor ambient temperature for the geographical loc ation ) f rom 7 0[...]

83 HEA TING LOAD FORM FRIEDRICH ROOM UNIT HEA T PUMPS BTU/HR PER W ALLS: (Linear Feet) °F TEMP . DIFFERENCE 2” Insulation Lin. Ft. x 1.6 Average Lin. Ft. x 2.6 WINDOWS & DOORS (Area, sq. ft.) Single Glass: Sq. Ft. x 1.13 Double Glass: Sq. Ft. x 0.61 INFIL TRA TION - WINDOWS & DOORS: A VG. Lin. Ft. x 1.0 Loose Lin. Ft. x 2.0 CEILING : (Ar[...]

84 Frie dri ch Ai r Condi ti oning C omp any P .O. Box 154 0 San A ntoni o, TX 782 95 210. 35 7 .4 4 0 0 ww w .fri edri ch. com R OOM AIR CONDITIONERS LIM ITED W AR R A N T Y FIRS T YE AR ANY P ART : If an y part supplied b y FRIEDRICH fails because of a defect in workmanship or material within twelve months from date of orig inal purc hase, FRI ED[...]

FRIEDRICH AIR CONDITIONING CO . Post Of fi ce Box 1540 · San Antonio, T exas 78295-1540 4200 N. Pan Am Expressway · San Antonio, T exas 78218-5212 (210) 357-4400 · 877-599-5665 x 846 · F AX (210) 357-4490 Email: tac@friedrich.com www .friedrich.com Printed in the U.S.A. TECHNICAL SUPPORT CONT ACT INFORMA TION[...]

Kuhl-ServMan (5-10) FRIEDRICH AIR CONDITIONING CO . Post Of fi ce Box 1540 · San Antonio, T exas 78295-1540 4200 N. Pan Am Expressway · San Antonio, T exas 78218-5212 (210) 357-4400 · F AX (210) 357-4490 www .friedrich.com Printed in the U.S.A.[...]