Instruction/ maintenance manual of the product P Carrier
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52C ,P SERIES PT A C Customer Suppor t Center 1•800•894•644 9 SERVICE TECHNICIAN GUIDE PACKAGED TERMINAL AIR CONDITIONERS AND HEAT PUMPS CONTENTS Page INTRO DUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,3 SUMMAR Y OF DANGERS, W ARNINGS, AND CAUTIONS .
52C , P SERIES 2 INTRODUCTION The focus of this manual is to provid e basic information on service procedur es, safety, troubleshooting, clean- ing, and component rep lacement for service tech ni- cians.
3 UNIT DISASSEMBL Y This section incl udes common procedures for disas- semb ly and re-ass embly o f unit . TOOLS NEEDED The follow ing field-s upplied items ar e reco mmended for genera l disassembl y of the unit: • Flat head screw driver • 5 / 16 -in.
52C , P SERIES 4 OPEN THE CONTROL BOX The control b ox is factory wire d. To open the box, remove the 2 screws on the top o f the control box and lower the front hinged panel. S ee Figure 6. REMOVE THE UNIT FROM THE W ALL SLEEVE 1. Rem o ve the four mou nti ng sc re ws tha t sec ure th e PTAC unit to the wall sleeve (2 screws per side).
5 ACCESSING UNIT COMPONENTS ACCESSING INDOOR-AIR SE CTION COMPONENTS ■ REMOVE LA TERAL DUCT EXTENSION ACCESSOR Y FOR UNITS EQUIPPED WITH TH E LA TERAL DUCT 1. Remove the 2 top screws that secure the lateral duct pl enum to the to p of th e later al du ct exte n- sion.
52C , P SERIES 6 ■ DET ACH THE CONDENSER ORIFICE FROM THE CONDENSER COIL 1. Remo ve top h alf of condens er o rifice . a. Unscrew the top hal f of the cond ens er ori fice b y backing of f the 4 captive scre ws. See Figure 13. b. Using a flat head screwdriver, gently pry the top hal f of the orif ice from the t ube sheets .
7 GUSSET SCREWS GUSSET SCREWS P AR TITION GUSSET CONDENSER ORIFICE (PLASTIC) GUSSET CONDENSER ORIFICE CAPTIVE SCREWS (2) CAPTIVE SCREWS (2) FIGU RE 12 — GUSSE T RE M O V AL FIGURE 13 — LOCA TION O.
52C , P SERIES 8 REINST ALL FRONT P ANEL 1. Grasp the front pa nel firmly at the center of the top and bot tom of the pan el, tilt ing i t forwa rd 5 to 10 deg rees from the v ertica l. S ee Fi gure 4 . 2. Plac e the top of t he fr ont pan el on to the unit, makin g sur e the to p eng agem ent p osts h ave engaged t he slots on th e unit.
9 GENERAL CLEANING Maintaini n g p roper performance of 52C,P systems requires conscientious cleaning and care of compo- nent s. See F igu re 20. Speci fic com pon ents re qui re periodic cleaning and.
52C , P SERIES 10 TOOLS NEEDED The foll owing li st includes the recommended too ls, devices, and cl eaning solution s for use in cleaning the 52C,P unit and comp onents . MONTHL Y CLEANING ■ AI R FIL TERS — The indoo r and vent air filters should be cleane d once per month.
11 SEASONAL CLEANING The ind oor and o utdoor co ils shou ld be clea ned at le ast once durin g eve ry se ason. Ref er to ACCESSING UNIT COMP ONENTS section to prepare unit.
52C , P SERIES 12 DRAIN V AL VE FIGURE 24 — V ACUUMING EV APORA TOR COI L FIGURE 2 5 — CLE A NI NG COILS FIGURE 23 — PT AC EXTERIOR SURF ACES FIGURE 2 6 — B A SEP AN SECTION.
13 COMPRESSOR A cutaway view of the rotary compr essor with key component s labele d is sho wn in Figure 27. Th e motor stator is rigidly attached to the compressor shell. The rotor is p ressed onto the e ccentric shaft, which is sup- port ed by 2 bearin gs.
52C , P SERIES 14 The rotary compress ion proce ss (Figure 28), starts at top dead cent er as shown in (1). Suction gas flow s through the suct io n inlet and into the cylinder area . As the shaft rotates throu gh 90 d egree s, the rollin g piston moves to posit ion A as shown in (2).
15 FIGURE 29 — BASIC COMPRESS OR TROUBLESHOOTING GUIDE 5. Next, pe rform a grounded wind ings test to test the resistance individually of each wire to the shell of the comp ress or. The pa in t on the compres - sor ca n pre vent goo d cont act b etwee n the prob e and the met al.
52C , P SERIES 16 ■ TOOLS NEEDED — The fo llowing list i nclu des the recommended t ools and devices for removing and replacing the compres sor. ■ REMOVING TH E COMPRESSOR — Follow the steps below to remove t he compressor: 1. Disconne ct all po wer to unit .
17 12. Insta ll the new compress or and the new capilla ry assembly (the correct capillary and strainer may be obtaine d from Carrier RCD), int o t he unit.
52C , P SERIES 18 HEA TERS The heater in 52C,P uni t s is located directly behind the evap orator coi l. The heater a ssembly incl udes the heater (2.3 k W, 3.4 kW o r 5 kW), a primary limit switch, and a secondary limit switch. See Figure 34. The primary and se condary li mit switche s are safe ty swi tches t hat regu lat e heater operat ion.
19 ■ TOOLS NEEDED — The fo llowing list i nclu des rec - ommende d tools a nd devices for working on the hea ter section of 52C,P units. Perf orm th e follo w i ng ste ps to remove th e Heater Assembly. 1. DISC ONNECT ALL PO WER TO U NIT. 2. Remo ve he ater by follo wing instr uction s in ACCESSING UNIT COMPONENTS section.
52C , P SERIES 20 OPERA TIN G CONTROLS UNIT -MOUNTED CONTR OLS The controls and compone nts used in the 52C,P cool- ing only or heat/cool units are as follo ws: the selec- tor switch, the indoor thermostat, the dual capacitor, the tempe rature lim iter, the ve nt lever, and the fan cycle switch.
21 W ALL-MOUNTED THER MOST A T CONTROLS For 52C,P wall thermostat cont rol (RC, RP) units, all c ontro ls ar e loc ated on the wall- m ount e d thermost at except the v ent lever and out door thermo- stat. Remote control is a fa ctory or field-insta lled opt ion.
52C , P SERIES 22 R Y W G O C R Y W G O C R Y W G O C R Y W G O C R Y W G O C T ’ S TAT MASTER PT AC UNIT 1 UNIT 2 UNIT 3 FIGURE 43 — TYPICAL WIRING FOR MUL TIPLE 52C PT AC UNITS CONNECTED TO ONE W ALL THERMOST A T All units must be connected to same groun d source.
23 DESCRIPTION OF SELECTO R SWITCH SETTINGS (Figure 44) ■ OFF MODE — The OFF pos ition termin a tes unit operat ion. ■ F AN ONL Y MOD E — Use fan only p osition for air circulation without heating or cooling.
52C , P SERIES 24 SEQUENCE OF OPERA TIO N ■ HEA T/COOL UNITS (Figure 45) Fan Mo de — W ith th e sele ctor swit ch set to FAN c on- tacts L1 to HI and FC S1 to L S are m ade. Cooli ng (L ow) — With the se lector swi tch set t o low speed co oling c ontact s FCS2 to LO, CO MP to F CS1, and COMP t o IT3 are ma de.
25 The Manufacture r reserves the right to discontinue, or change at a ny time, s pecification s or desig ns witho ut notice and without incurring obligations .
52C , P SERIES 26 ■ OU TDOOR FROST THERM OST A T (Heat Pump Units) (Figure 50A and 50B) — The Outdoor Frost Thermo stat (OFT ) is a t hermostat that u ses a sin gle- pole switch with a manual override selector.
27 5. The reading on the meter should first indicate zero, or a lo w resistance , then slowly ri se toward infinit y or some high val u e or measurabl e re sis- tance.
52C , P SERIES 28 4. Remove the thermost at capillary from the out door coil and clip any wire ties holding the capillary in place. 5. Disconnect the wires and carefully remove the thermostat an d capillary from the unit, noting location of wires for easy re-assembly.
29 F AN MOTOR The fan motor is a permanent split capacitor (PSC) type motor. This motor is common in air-conditioning syst em ap pl icat ions. A PSC m oto r do es no t r equi re the use of a relay and always has a run capacitor con- nected be tween the run a nd start wi ndi ngs of the motor .
52C , P SERIES 30 FIGURE 56 — F AN MOTOR TROU BLESHOO TING CHAR T TYPICAL 208/230 V OL T MOTORS NO TE: Resistance values are approximate. TYPICAL 26 5 VOL T MOTORS NO TE: Resistance values are approximate.
31 F AN MOTOR REPLACEMEN T 1. DISC ONNEC T ALL POWER TO U NIT . 2. Remove t he unit from the slee ve as detailed i n the UNIT DISASS EMBLY section and plac e the unit on a large flat surface. 3. Remove the disc harge deck and grille as detailed in Remove the Di scharge Deck Asse mbly sectio n.
52C , P SERIES 32 14 16 18 20 22 50 60 70 80 90 100 1 10 120 130 Outdoor Air T emperature (F) (40% RH) 70 F Indoor 75 F Indoor 80 F Indoor 85 F Indoor Indoor Coil Delta T emperature (F) FIELD TEMPERA TURE CHA R TS Refer to Figures 59-67 for field t empe rature data.
33 16 18 20 22 24 50 60 70 80 90 100 1 10 120 130 Outdoor Air T emperature (F) (40% RH) 70 F Indoor 75 F Indoor 80 F Indoor 85 F Indoor Indoor Coil Delta T emperature (F) FIGUR E 60 — 52C A ND 52P 9.
52C , P SERIES 34 18 20 22 24 26 50 60 70 80 90 100 1 10 120 130 Outdoor Air T emperature (F) (40% RH) 70 F Indoor 75 F Indoor 80 F Indoor 85 F Indoor Indoor Coil Delta T emperature (F) FIGURE 61 — .
35 20 22 24 26 50 60 70 80 90 100 1 10 120 130 Outdoor Air T emperature (F) (40% RH) 70 F Indoor 75 F Indoor 80 F Indoor 85 F Indoor Indoor Coil Delta T emperature (F) FIGURE 62 — 5 2CQ 12,000 BTU H.
52C , P SERIES 36 18 20 22 24 50 60 70 80 90 100 1 10 120 130 Outdoor Air T emperature (F) (40% RH) 70 F Indoor 75 F Indoor 80 F Indoor 85 F Indoor Indoor Coil Delta T emperature (F) FIGURE 63 — 52C.
37 18 20 22 24 26 28 50 60 70 80 90 100 1 10 120 130 Outdoor Air T emperature (F) (40% RH) 70 F Indoor 75 F Indoor 80 F Indoor 85 F Indoor Indoor Coil Delta T emperature (F) FIGURE 64 — 52C AND 52 P.
52C , P SERIES 38 20 25 30 35 40 50 52 54 56 58 60 62 64 66 68 70 72 74 Indoor Entering Air T emperature (F) Indoor Air T emperature Rise (F) 208 V , 2.
39 15 20 25 30 35 40 45 50 52 54 56 58 60 62 64 66 68 70 72 74 Indoor Entering Air T emperature (F) 208 V , 2.3 kW 208 V , 3.4 kW 208 V , 5.0 kW 230/265 V , 2.
52C , P SERIES 40 15 20 25 30 35 40 50 52 54 56 58 60 62 64 66 68 70 72 Indoor Entering Air T emperature (F) 7,000 Btu 9,000 Btu 52P-12,000 Btu 52C-12,000 Btu 15,000 Btu Indoor Air T emperature Rise (.
41 WIRING DIAGRAMS Refer to Figures 68-72 for Typical Wiring Schematics. NOTE: Figures 68-72 should not be substituted for the schematic located on cont rol box.
52C , P SERIES 42 TY PICAL T HERM OST A T INTE RF ACE 1. If ‘ W ’ is ON, th en ‘ FR ’ is f orced O N (regardle ss of ‘ G ’ ) & ‘ CR ’ is forced OFF . 2. If ‘ Y ’ is ON, the n ‘ FR ’ is f orced ON (reg ardless of ‘ G ’ ).
43 FIGURE 70 — 52CE AND 52PE — TYPICAL WIRING SCHEMA TI C FOR ST ANDARD H EA T/COOL U NITS COMPONENT LEGEND Compon ent Con nection (Marked ) Compon ent Con nection (Unmar ked) Accessor y or O ptio.
52C , P SERIES 44 FIGURE 71 — 52CE AND 52PE — TYPICAL WIRING SCHEMA TIC FOR W ALL THERMOST A T CONTROL HEA T/COOL UNITS NOTES: 1. Recommended f or use on grounded po wer supply o nly . 2. Compressor and f an motor th ermally protected. 3. Use copper conducto rs only .
45 FIGURE 72 — 52PC — TYPICAL WIR ING SCHEMA TIC FOR ST ANDAR D CO OL ING ONL Y UNITS.
52C , P SERIES 46 MOST FREQUENT PT AC SER VICE QUESTIONS 1. Can rem ote wall th erm os tat s be u se d on standard (AA) model s? No, only for use on remote cont rol (R C,RP) models . H ow- ever, ac cessory RC- Retrofit Ki t can be ordered t o conver t standa rd un i ts to R C uni ts.
47 ACCE SSORIES *Extend ed metal wall sleev e also available in 26 in. and 28 in. dept h. † Custom colors are also av ailable. A CCESSOR Y FORM NUMBER P ART NUMBER DESCRIPTION Wall S leeves 52S-48 S.
52C , P SERIES 48 52C PERFORMANCE AND PHYSICAL DA T A FIGURE 73 — 52 CE — PERFORMAN CE AN D PHYSICAL DA T A FOR ST ANDARD HEA T/COO L UNITS FIGURE 74 — 52 CQ — PERFORM ANCE AND P HY SICAL DA T A FO R ST ANDAR D HEA T PUMP U NITS CA T ALOG NUMBER COOLING (Btuh) EER EL ECTRI C HEA T (Btuh) COP REVERSE CYCLE HEA T (Btuh) EV AP .
49 52P PERFORMANCE AND PHYSICAL DA T A FIGURE 75 — 52PE — PERFORMANCE AND PHYSICAL DA T A FOR ST ANDARD HEA T/COOL UNITS FIGURE 76 — 52PQ — PERFORMANCE AND PHYSICAL DA T A FOR ST ANDARD HEA T PUMP UNITS CA T ALOG NUMBER COOLING (Btuh) EER ELECTRIC HEA T (Btu h) COP REVER SE CYCLE HEA T (Btuh) EV AP .
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Copyright 20 02 Car rier Cor poration Manufa ctur er rese rve s the righ t to dis cont inue, or ch ange a t any tim e, s pecif icati ons or des igns without noti ce an d with out inc urring o bligations. PC 132 Catalog No. 535-20 050 Prin ted in U.S.A.
An important point after buying a device Carrier P (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Carrier P yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Carrier P - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Carrier P you will learn all the available features of the product, as well as information on its operation. The information that you get Carrier P will certainly help you make a decision on the purchase.
If you already are a holder of Carrier P, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Carrier P.
However, one of the most important roles played by the user manual is to help in solving problems with Carrier P. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Carrier P along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
