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Carrier 48EZ(N)-A - page 1
1 48EZ( N) - - - A Comfort t 13 SE ER Si ngle - - - Packag ed HYBR ID HEA T r Du al F uel Sy stem w ith P uro n ® (R - - - 410A) Re frige rant Sing le and Thre e Phase 2 --- 5 N o m i n a l T o n s ( S i z e s 2 4 --- 6 0 ) Installation Instructions NOTE : Read the en tire instru ction m anual b efore starting th e installatio n. NOTE : I nst al l ...
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Carrier 48EZ(N)-A - page 2
2 es wh ich may re sult i n minor pe rs onal inj ury or pr oduct and pr op- er ty dama ge. N OTE is us ed t o highl ight sugge st ions whi ch will result in en hanced in stallation , reliability , o r op eration . ELECTRICAL SHOCK HAZARD Fai lur e t o foll ow thi s wa rni ng coul d re sul t in per sona l inj ury or dea th. Befo re installin g or se ...
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Carrier 48EZ(N)-A - page 3
3 A09450 Fig. 2 - - 48EZ- - A24- - 36 Unit Di mens ions 48EZ - - A ...
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Carrier 48EZ(N)-A - page 4
4 A09451 Fig. 3 - - 48EZ- - A42- - 60 Unit Di mens ions 48EZ - - A ...
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Carrier 48EZ(N)-A - page 5
5 L ARGE CURB SMALL CURB ROOF CURB DET AIL Wood nailer* Roofcurb* Insulation (field supplied) *Provided with roofcurb Cant strip field supplied Roofing material field supplied Flashing field supplied HVAC unit base rails Roofcurb Sealing Gasket HVAC unit basepan Anchor screw A09090 A09415 A09418 C B A F D E G H C B A D E H F G A09419 UNIT S IZE CAT ...
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Carrier 48EZ(N)-A - page 6
6 A CCESS P ANELS MUST BE IN PLA CE WHEN RIGGING. P ANNEAUX D'A CCES DOIT ÊTRE EN PLACE POUR MANIPULA TION. 50CY502286 2.0 CA UTION - NOTICE TO RIGGERS PRUDENCE - AVIS AUX MANIPULATEUR Use top skid as spreader bar. / Utiliser la palette du haut comme barre de répartition SEAL STRIP MUST BE IN PLACE BEFORE PLACING UNIT ON ROOF CURB DUCTS DETA ...
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Carrier 48EZ(N)-A - page 7
7 hooking poi nts a nd loa d support ar ea s. Ma te ri al s s howing any ki nd of we ar i n the se ar ea s m ust not be use d and s hould be disc ar ded. UNIT F ALLING HAZARD Fai lur e t o foll ow thi s wa rni ng coul d re sul t in per sona l inj ury or dea th. Ne ver s tand be nea th rigge d units or l if t over pe ople . ! W ARNING PROPERTY DAM A ...
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Carrier 48EZ(N)-A - page 8
8 A 1/8 - - in. ( 3.2 mm) NPT plugge d ta pping, accessib le fo r test g aug e conne ct ion, must be ins ta ll ed i mmedi at el y upst rea m of the gas suppl y conne ct ion t o the gas valve . Wh en in stalling th e gas s upply li ne, obse rve loc al code s per ta ini ng to g as pip e installatio ns. Refer to the NF GC NF P A 54 /ANS I Z223.1 lat e ...
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Carrier 48EZ(N)-A - page 9
9 Ste p 9 — Install D uct Co nnect ions The unit ha s duct f la nges on the s upply - - and re turn- -air openi ngs on the si de and bott om of the uni t. For downshot appli ca ti ons, the duct work c onnec ts to t he r oof cur b (Se e Fi g. 2 and 3 for con nectio n sizes an d locatio ns). Confi guri ng Units f or Downf low (V e rti cal ) Disc ha ...
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Carrier 48EZ(N)-A - page 10
10 T able 1 – Phys ic al Dat a - - Unit 48EZ- -A UNIT SIZE 48E Z - - - A 24040 24060 30040 30060 36060 36090 42060 42090 NOMI NAL CA P A CI TY - - - to n 2 2 2 --- 1 / 2 2 --- 1 / 2 3 3 3 --- 1 / 2 3 --- 1 / 2 SHI PPING WEIG HT - - - lb . (kg) 359 163 359 163 373 169 373 169 379 172 379 172 461 209 461 209 COMP RESSORS Sc roll Quantity 1 RE FRIG ...
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Carrier 48EZ(N)-A - page 11
11 T able 1 - - Physic al Dat a - - Unit 48EZ - - A (Cont ’d) UNIT SIZE 48E Z - - - A 48090 48115 48130 60090 60115 60130 NOMI NAL CA P A CI TY - - - to n 444555 OPERA TING WEIGHT - - - lb (kg) 482 219 482 219 482 219 507 230 507 230 507 230 COMP RESSORS Sc roll Quantity 1 RE FRIG ERA NT (R - - - 410A) Quantity - - - l b (kg ) 9.6 4.4 12.3 5.6 RE ...
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Carrier 48EZ(N)-A - page 12
12 Step 10 — I nsta ll El ectrical Co nn ection s ELECTRICAL SHOCK HAZARD Fai lur e t o foll ow thi s wa rni ng coul d re sul t in pe rs onal inj ury or dea th. The unit c abi net mus t have a n unint er rupte d, unbroke n el ec tr ic al gr ound. This ground may cons is t of an el ec tr ic al wir e conne ct ed to the unit ground scr ew in the c o ...
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Carrier 48EZ(N)-A - page 13
13 Contr ol V oltage Conne cti ons Do not us e a ny type of powe r- - s tea li ng the rmos ta t. Uni t cont rol probl ems m ay re sult . Us e no. 18 Amer ic an W ire G age (A WG) col or- -code d, ins ula te d (35 _ C mini mum) wir es to make the c ontr ol vol ta ge conne ct ions betw een the th ermo stat an d th e u nit. If the th ermo stat is lo c ...
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Carrier 48EZ(N)-A - page 14
14 4. V eri fy t he f oll owing c onditi ons: a. Ma ke sur e gas l ine is f re e of ai r . Befor e li ghti ng the unit for th e first time, p erform the fo llowin g w ith th e gas val ve in the “ OFF” posi tion: NOTE : I f the ga s supply pipe wa s not pur ged be for e conne ct ing the uni t, i t wil l be ful l of ai r . It is re comm ende d th ...
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Carrier 48EZ(N)-A - page 15
15 integ rated gas u nit con troller (IG C) h as the capab ility to aut oma tic al ly re duce t he eva pora tor “O N” de la y and in- crease the ev apo rator “OF F” d elay in th e ev ent of h igh du ct st at ic a nd/or pa rti al ly- - c logge d f ilter . Ch eck Gas Input Chec k gas input a nd ma nifol d pre ss ure a fte r unit s ta rt- -up ...
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Carrier 48EZ(N)-A - page 16
16 EX AMP LE : Assum e that th e size of test d ial is 1 cu ft, one re volut ion t ake s 32 s ec , and t he heat ing va lue of t he ga s i s 1050 Btu/ ft 3 . Proceed as fo llows: 1. 32 s ec . to compl ete one r evol uti on. 2. 3600 ÷ 32 = 1 12.5. 3 . 1 1 2 . 5x1= 1 1 2 . 5f t 3 of gas f low/ hr . 4. 112.5 x 1050 = 118, 125 Btuh i nput. If the des ...
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Carrier 48EZ(N)-A - page 17
17 placed in O N po sition and sh uts d ow n wh en F A N switch is placed in A UTO po sition . 2. Place SYS TE M switch in CO OL po sition an d F AN switch in AUT O posit ion. Se t cool ing cont rol be low room te mpe rat ure . Obse rve tha t com pre ss or , conde nse r f an, a nd eva pora tor bl ower m otors s ta rt . Obse rve t hat c ooli ng cyc ...
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Carrier 48EZ(N)-A - page 18
18 2. Remove the c urr ent s pee d tap wir e fr om the “L OW” termin al on the in terface fan b oard (IF B) (See F ig. 1 3) and pla ce vi nyl ca p over the c onnect or on the wi re . 3. Co nn ect th e desired sp eed tap w ire to the “L OW” termin al on th e interface fan bo ard (IFB ). T wo Cooling Fan Sp ee ds Set-up (D ehu midifica tion f ...
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Carrier 48EZ(N)-A - page 19
19 T able 7 – Dr y Coil Air De live ry* - - Hori zont al - - Unit 48EZ- -A24 - -60 UNIT HEA TING RISE RANGE MOTOR SPEED WIRE COL OR EXTER NAL STA TI C PRES SUR E (in. W.C.) 0.1 0.2 0.3 0.4 0.5 0. 6 0.7 0.8 0.9 48EZ( - - - ,N)A24040 30 - - - 60 o F ( 1 7 --- 3 3 o C) Low Blue CFM 754 650 538 429 --- --- --- --- --- --- --- --- --- --- Hea tin g Ri ...
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Carrier 48EZ(N)-A - page 20
20 T able 7 ( cont) - - Dry Coi l Air De live ry* - - Hori zont al Dis char ge - - Uni t 48EZ - - A24- - 60 UNIT HEA TING RISE RANGE MOTOR SPEED WIRE COL OR EXTER NAL STA TI C PRES SUR E (in. W.C.) 0.1 0.2 0.3 0.4 0.5 0. 6 0.7 0.8 0.9 48EZ( - - - ,N)A30040 30 - - - 60 o F ( 1 7 --- 3 3 o C) Low Blue CFM 741 638 547 415 --- --- --- --- --- --- --- - ...
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Carrier 48EZ(N)-A - page 21
21 T able 7 ( cont) - - Dry Coi l Air De live ry* - - Hori zont al Dis char ge - - Uni t 48EZ - - A24- - 60 UNIT HEA TING RISE RANGE MOTOR SPEED WIRE COL OR EXTER NAL STA TI C PRES SUR E (in. W.C.) 0.1 0.2 0.3 0.4 0.5 0. 6 0.7 0.8 0.9 48EZ( - - - ,N)A36060 25 - - - 55 o F ( 1 4 --- 3 1 o C) Low 1 Blue CFM 1234 1168 1093 1021 961 894 825 759 687 Hea ...
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Carrier 48EZ(N)-A - page 22
22 T able 7 ( cont) - - Dry Coi l Air De live ry* - - Hori zont al Dis char ge - - Uni t 48EZ - - A24- - 60 UNIT HEA TING RISE RANGE MOTOR SPEED WIRE COL OR EXTER NAL STA TI C PRES SUR E (in. W.C.) 0.1 0.2 0.3 0.4 0.5 0. 6 0.7 0.8 0.9 48EZ( - - - ,N)A42060 25 - - - 55 o F ( 1 4 --- 3 1 o C) Low 1 Blue CFM 1295 1234 1182 1126 1075 1016 955 898 857 H ...
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Carrier 48EZ(N)-A - page 23
23 T able 7 ( cont) - - Dry Coi l Air De live ry* - - Hori zont al Dis char ge - - Uni t 48EZ - - A24- - 60 UNIT HEA TING RISE RANGE MOTOR SPEED WIRE COL OR EXTER NAL STA TI C PRES SUR E (in. W.C.) 0.1 0.2 0.3 0.4 0.5 0. 6 0.7 0.8 0.9 48EZ( - - - ,N)A48090 35 - - - 65 o F ( 1 9 --- 3 6 o C) Low 1 Blue CFM 1402 1351 1311 1263 1224 1172 1136 1080 104 ...
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Carrier 48EZ(N)-A - page 24
24 T able 7 ( cont) - - Dry Coi l Air De live ry* - - Hori zont al Dis char ge - - Uni t 48EZ - - A24- - 60 UNIT HEA TING RISE RANGE MOTOR SPEED WIRE COL OR EXTER NAL STA TI C PRES SUR E (in. W.C.) 0.1 0.2 0.3 0.4 0.5 0. 6 0.7 0.8 0.9 48EZ( - - - ,N)A48130 35 - - - 65 o F ( 1 9 --- 3 6 o C) Low Blue CFM 1402 1351 1311 1263 1224 1172 1136 1080 1041 ...
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Carrier 48EZ(N)-A - page 25
25 T able 8 (c ont) - - Dry Coi l Air Del ive ry* - - Hori zontal and Downfl ow Dis char ge - - Unit 48EZ - - A24 - - 60 UNIT HEA TING RISE RANGE MOTOR SPEED WIRE COL OR EXTER NAL STA TI C PRES SUR E (in. W.C.) 0.1 0.2 0.3 0.4 0.5 0. 6 0.7 0.8 0.9 48EZ( - - - ,N)A60115 30 - - - 60 o F ( 1 7 --- 3 3 o C) Low Blue CFM 1445 1389 1341 1281 1236 1189 11 ...
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Carrier 48EZ(N)-A - page 26
26 T able 8 – Dry Coil Air Deli ver y - - Downflow Di schar ge UNI T MOTOR SP EED WIRE CO L OR EXT ERNAL STATIC PR ES SURE (IN W .C.) 0.1 0. 2 0. 3 0.4 0.5 0.6 0.7 0. 8 0.9 1 48EZ - - - A24 High Blac k 1050 1000 950 900 850 - - - - - 48EZ - - - A30 High Blac k 1050 1000 950 900 850 - - - - - 48EZ - - - A36 High Blac k 1615 1555 1495 1435 1375 132 ...
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Carrier 48EZ(N)-A - page 27
27 A10207C Fig. 14 - - 208/230- - 1- - 60 Connec ti on Wi ri ng Diagr am, Unit 48EZ- -A 48EZ - - A ...
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Carrier 48EZ(N)-A - page 28
28 A10207L Fig. 14 Cont - - 208/230- - 1- - 60 Ladde r W ir ing Di agram, Uni t 48EZ- - A 48EZ - - A ...
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Carrier 48EZ(N)-A - page 29
29 A10208C Fig. 15 - - 208/230- - 3- - 60 Connec ti on Wi ri ng Diagr am, Unit 48EZ- -A 48EZ - - A ...
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Carrier 48EZ(N)-A - page 30
30 A10208L Fig. 15 Cont . - - 208/230- - 3- - 60 Ladde r W ir ing Di agram, Unit 48EZ- -A 48EZ - - A ...
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Carrier 48EZ(N)-A - page 31
31 A08019 Fig. 16 - - Cooli ng Chargi ng T able- -Subcooli ng 48EZ - - A ...
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Carrier 48EZ(N)-A - page 32
32 MAINTENANCE T o ensur e c onti nuing hi gh perf orm anc e a nd to mi nimi ze the po ssibility of p rematu re equ ipmen t failure, p eriod ic main tenan ce mu st b e p erformed o n this eq uip ment. T his co mbin ation hea ti ng/c ooli ng unit shoul d be inspe ct ed a t lea st once each y ear by a qual if ie d s er vic e per son. T o troubl es ho ...
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Carrier 48EZ(N)-A - page 33
33 f. Connec t 5 pi n plug a nd 4 pin plug t o indoor blow er motor . g. Rein stall blo wer access pan el (see Fig . 18 ). 3. Resto re electrical pow er to u nit. Start u nit and ch eck for prope r blowe r r ota tion and m otor spe eds duri ng hea ti ng and coo ling cy cles. Integrated Gas Unit Controller (IGC) Induced Draft Motor Rollout Switch Mo ...
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Carrier 48EZ(N)-A - page 34
34 BLOWER HOUSING 2 SETSCREWS (HIDDEN) C99085 Fig. 19 - - Rem oval of Motor and Blowe r Whee l A07680 Fig. 20 - - Burne r Rack Re moved FEEDER TUBE STUB TUBE DEFROST THERMOST A T C99029 Fig. 21 - - De fr ost The rmos tat Loc ation A07680 Fig. 22 - - Burne r Rack Re moved Outdoor Fan UNIT OPERA TION HAZARD Failu re to fo llow this cautio n may resu ...
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Carrier 48EZ(N)-A - page 35
35 OF2 OF1 ON QUIET SHIFT 120 30 60 60 30 90 INTER V AL TIMER OFF P3 DFT O R W 2 Y C T2 C C O DFT T1 Y P1 J1 SPEEDUP Speedup Pins Defrost inter v al DIP s witches Quiet Shift A08020 Fig. 23 - - De fr ost Contr ol EXPLOSION, PERSONAL INJURY AND ENVIRONMENT AL HAZARD Fai lur e t o foll ow thi s wa rni ng coul d re sul t in per sona l i njur y , death ...
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Carrier 48EZ(N)-A - page 36
36 C99097 Fig. 24 - - Ref ri ger ant Cir cuit 2. Disc onnec t le ads on swi tc h. 3. Apply ohm me te r le ads ac ros s swi tch. Y ou should ha ve cont inui ty on a good sw itc h. NOTE : Becau se th ese switch es are attach ed to refrig eration sys te m unde r pres sur e, it is not advi sa ble to rem ove this devi ce f or tr ouble shoot ing unle ss ...
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Carrier 48EZ(N)-A - page 37
37 COMPRESSOR ACCUMULATOR OUTDOOR COIL INDOOR COIL LCS LEGEND HPS – High Pressure Switch LCS – Loss of Charge Switch Accurater ® Meter ing De vice Arro w indicates direction of flo w TXV in Metering Position Bypass P osition HP S C03011 Fig. 25 - - T ypic al Heat Pump Ope rat ion, Cooli ng Mode COMPRESSOR ACCUMULATOR OUTDOOR ...
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Carrier 48EZ(N)-A - page 38
38 Ser vic ing Sys te ms on Roof s and wi th Synt heti c mat er ial s POE ( polyol es ter ) com pres sor lubr ic ants a re known t o ca use l ong term d amage to so me syn thetic ro ofin g materials. Exposur e, e ven i f im medi at ely cl ea ned up, ma y ca use emb rittlement (lead ing to crack ing ) to o ccur in on e year o r mo re. Whe n per for ...
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Carrier 48EZ(N)-A - page 39
39 T able 12 – T r ouble shooti ng Guide - - Cooli ng or He at Pump H eati ng Mode SYMPTOM CAUS E REMED Y Compr essor an d Outdoor f an w ill not star t. Po we r Fa i l ur e Cal l power com pany . Fuse blown o r circuit brea ker tripped R e p l a c ef u s eo rr e s e tc i r c u i tb r e a k e r . Def ective ther mostat, con tactor , tr ansf ormer ...
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Carrier 48EZ(N)-A - page 40
40 T able 13 – T r ouble shooti ng Guide –Heat ing SYMPTOM CAUSE REMEDY Burners will n ot ignit e W ater in gas line Drain. Ins tall drip leg. No power to fur nace Check power s upply fuses, w iring or circuit break er . No 24 - - v power s upply to contr ol circuit Check tr ansformer. NOT E: S ome tr ansformers hav e internal over - -c urrent ...
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Carrier 48EZ(N)-A - page 41
41 ST AR T - - UP CHECKLIST (Re move and Stor e in Job Fi le s) I. PRELI MINAR Y INFORMA TION MODEL NO.: SERIAL NO. : DA TE: TECHNICI AN: II. PRE ST ART - - U P (Insert check m ark in b ox a s ea ch item is co mp leted) ( ) VERIFY THA T ALL P ACKING MA TERIALS HA VE BEEN REMOVED FROM UNI T ( ) REMOVE ALL SHIPPING HOLD DOW N BOL TS AND BRACKETS PER ...
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