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Friedrich SH20L50-A - page 1
SH15L30-A SH20L30-A SH20L50-A HG-SVC-PRTS-05 (4-05) Ser vic e & P ar ts Manual R oom Air Conditioners 50 & 60 Hz M ode ls 20 05 ...
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Friedrich SH20L50-A - page 2
2 TA B L E O F C O N T E N T S Specifi cations ............................................................................................................... .................... 3 Performance Data ............................................................................................................. ............... 3 Component Operation &a ...
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Friedrich SH20L50-A - page 3
3 EV APORA TOR AIR TEMP . DEG. F EV APORA TOR TEMP . DEG. F CONDENSER TEMP . DEG. F Discharge Te m p Suction Te m p Liquid Te m p Super Heat Sub- Cooling OPERA TING PRESSURES ELECTRICAL RA TINGS R-22 REF . Evap CFM Motor RPM BREAKER FUSE Discharge Air Te m p . Drop F . E(in) E(out) Suction Discharge Amps Cool Amps Heat Locked Rotor Amps Charge in O ...
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Friedrich SH20L50-A - page 4
4 COMPRESSOR WINDING TEST (Figure 2.) Remov e the co mpressor ter minal box cover and disconnect the wires from the ter minals. Using an ohmmet er , check c ontinuity across the following: COMPONENT OPERA TION AND TESTING COMPRESSORS Com pr ess ors ar e s ing le p has e , 2 08 /230 v ol t. Al l compressor motors are per manent spl it capacitor t yp ...
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Friedrich SH20L50-A - page 5
5 F AN MOTOR (Figure 4) A 230 volt single phase permanent spl it capacitor motor is used to dr ive the evaporator blower and c ondens er fan. A running capacitor is wired a cross the star t and run terminals of the motor . The motor is t otally enclosed and is prot ected with a line voltage ov erload loc ated int ernally of the motor . The motor s ...
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Friedrich SH20L50-A - page 6
6 RED DOT RUN CAP ACITOR FA N MOTOR COMPRESSOR FIGURE 7 RUN CAP ACITOR HOOK–UP CAP ACITOR, RUN A run capacitor is wired across the auxiliar y and main winding of a single ph ase permanent split capacitor motor s uch as the compressor and fan motors. A s ingle capacitor can be used for each moto r or a dual rat ed capacitor can be used for both . ...
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Friedrich SH20L50-A - page 7
7 Note: The t emperature mu st be within the range li sted to check the th ermostat. Ref er to the trou bleshooti ng section in this manual for additional in formation on ther most at te sting. TEST Remo ve the wires from the th ermostat. T urn the thermostat to its coldest position. Check to see if there is continuity bet ween the t wo terminals. ...
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Friedrich SH20L50-A - page 8
8 LOW AMBIENT BYP ASS V AL VE (Figure 9) T h e H a z a r d G a r d u n i t i s d e s i g n e d t o o p e r a t e a t l o w outside ambient temperatures. This is acc omplished by the use of a b y pass valv e installed in the refr igeration circuit. The v alve is connected be t ween the discha rge line at the compressor and the su ction proc ess tube ...
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Friedrich SH20L50-A - page 9
9 NOTE: This procedur e can be sped up by the use of heat lam ps, or by brea king the vacuum with refrigerant or dr y nitrogen at 5,00 0 microns. Pressure s ystem to 5 PSIG an d leav e in the sys- tem a minimum o f 1 0 minutes. R ecover refriger - ant, an d proceed with evacu ation to a pressu re of 200 mic rons or a minimum of 1 0 % . 1 1 . Break ...
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Friedrich SH20L50-A - page 10
10 NOTE: All inoperative compressors returned to Friedrich must have all lines properly plugged with the plugs from the replacement compressor . REFRIGERANT CHARGE 1 . The refrigerant charge is e xtremely c ritic al. Measure the charge carefully an d as e xactly as possible t o the namepl ate ch arge. 2. The cor rect method for chargi ng the rotar ...
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Friedrich SH20L50-A - page 11
11 TROUBLESHOOTING PROBLEM POSSIBLE CAUSE TO CORRECT UNI T DOES N OT RUN. Power disconnected. Check power sourc e. System switch in “O f f ” position. Se t switch co rrec tly . Branch c ircuit fuse blown or circuit breaker tripped. Replace fuse, reset break er . If repeats, check f use or breaker siz e. Check for shor ts in unit w iring and com ...
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Friedrich SH20L50-A - page 12
12 TROUBLESHOOTING (Co ntinu ed ) PROBLEM POSSIBLE CAUSE T O CORRECT COM PRESSO R AT T E M P T S T O ST ART , O R RUNS FO R S H O R T PERIOD S ONL Y . C Y CLES ON OV ER LOA D. Compress or attempts to st ar t before system pressures are equal ized . Allow a minimum of t wo ( 2) minutes to allow pressures to equalize before attempting to st ar t. Low ...
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Friedrich SH20L50-A - page 13
13 TROUBLESHOOTING (Co ntinu ed ) PROBLEM POSSIBLE CAUSE T O CORRECT FA N M O T O R D O E S NOT R UN. Defective switch (O n- Of f ) . Check c ontinuit y across ter minals 2 and 3. Fan c a p a c i t o r o p e n . Check by substituting a known good c apac itor of the same rating . Inoperative fan motor . Direct test fan motor . Incor rec t wiring of ...
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Friedrich SH20L50-A - page 14
14 WIRING D IA GR AM MODELS SH 1 5L3 0 - A , SH20 L30 - A , SH20L5 0 - A ...
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Friedrich SH20L50-A - page 15
15 HAZARDGARD CABINET P ARTS ...
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Friedrich SH20L50-A - page 16
16 HAZARDGARD CHASSIS P ARTS ...
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Friedrich SH20L50-A - page 17
17 HAZARDGARD P ARTS LIST REF DESCRIPTION P ART NO# MODELS CODE ELECTRICAL P ARTS SH15L30-A SH20L30-A SH20L50-A 1 COMPRESSOR 61 193549 1 600 1 COMPRESSOR 61 193550 1 600 1 COMPRESSOR 61 193565 1 600 2 MOTOR, F AN 61871426 11 1 0 2 MOTOR, F AN 61871427 11 1 0 2 MOTOR, F AN 61871450 11 1 0 5 SWITCH, ON-OFF DPST 60935300 1 1 1 130 * INSULA TOR, ELECTR ...
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Friedrich SH20L50-A - page 18
18 REF DESCRIPTION P ART NO# MODELS CODE CHASSIS P ARTS SH15L30-A SH20L30-A SH20L50-A 26 SHROUD, CONDENSER 61803601 17 2 0 26 SHROUD, CONDENSER 61804901 11 7 2 0 27 BRACE, COND.SHROUD 61802600 33 3 7 2 2 22 F AN BLADE, COND. 60542003 17 1 0 22 F AN BLADE, COND. 60542004 11 7 1 0 23 BLOWER WHEEL, EV AP . 60610616 17 0 0 23 BLOWER WHEEL, EV AP . 6061 ...
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Friedrich SH20L50-A - page 19
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Friedrich SH20L50-A - page 20
HG-SVC-PRTS-05 (4-05) Use Factory Certifi ed Parts. FRIEDRICH AIR CONDITIONING CO. P ost Office Box 1540 · San Antonio, T exas 78295-1540 4200 N. P an Am Expressway · San Antonio, T exas 78218-5212 (210) 357-4400 · F AX (210) 357-4480 www .friedrich.com Printed in the U.S.A. ...
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