Instruction/ maintenance manual of the product 48MPD Carrier
Go to page of 64
Installation, Start-Up and Service Instructions CONTENTS Page GENERAL ................................. 2 SAFETY CONSIDERA TIONS ................. 2 INST ALLA TION ............................ 3-28 Jobsite Survey ............................. 3 Unit Placement .
CONTENTS (cont) Page Lubrication ................................ 4 7 • COMPRESSORS • F AN SHAFT BEARINGS • F AN MOTOR BEARINGS • DOOR HINGES Coil Cleaning .............................. 4 7 Refrigerant Circuit ......................... 4 7 Oil Charge .
INST ALLA TION Jobsite Survey — Complete the following checks be- fore installation. 1. Consult local building codes and the NEC (National Electrical Code) (ANSI/NFP A [National Fire Protection Association] 70) for special installation requirements.
T able 1 — Physical Data BASE UNIT 48/50MP 62L 70M 82N NOMINAL CAP ACITY (tons) 80 90 105 OPERA TING WEIGHT (lb) Base Unit (48MP/50MP) 16,810/16,550 18,060/17,800 22,660/22,400 Copper Condenser Coils 675 725 725 Exhaust Fan 1,675 1,775 2,375 COMPRESSORS Semi-Hermetic Number of Refrigerant Circuits 22 2 Circuit (No.
T able1 — Physical Data (cont) BASE UNIT 48/50MP 90P 10R NOMINAL CAP ACITY (tons) 1 15 120 OPERA TING WEIGHT (lb) Base Unit (48MP/50MP) 24,660/24,750 25,1 10/25,100 Copper Condenser Coils 950 950 Exhaust Fan 2400 2400 COMPRESSORS Semi-Hermetic Number of Refrigerant Circuits 22 Circuit (No.
T able 2 — Optional Power Exhaust Specifications UNIT 48/50MP 62L 70M 82N T ype 100% Mod 100% Non Mod 100% Mod 100% Non Mod 100% Mod 100% Non Mod Motor Hp 30 30 40 40 40 40 Motor Frame Size 286T 286T 324T 324T 324T 324T Eff iciency at Full Load (%) Standard Eff iciency 92.
NOTES: 1. Roof curb is shipped disassembled. 2. Roof curb: 14 gage [V A03-56] steel. 3. Dimensions in [ ] are in millimeters. 4. T o prevent standing water in the drain pan of the indoor section, roof curb and unit must be level within tolerances shown.
NOTES: 1. Roof curb is shipped disassembled. 2. Roof curb: 14 gage [V A03-56] steel. 3. Dimensions in [ ] are in millimeters. 4. T o prevent standing water in the drain pan of the indoor section, roof curb and unit must be level within tolerances shown.
UNIT SIZE 48MPD,E WEIGHT A B C D E F lb kg mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. 62L 16,810 7624 3505 1 1- 6 957 3-1 11 ⁄ 16 5909 19-4 5 ⁄ 8 1203 3-1 1 3 ⁄ 8 13 01 1 42-8 1.
UNIT SIZE 48MPD,E WEIGHT A B C D E F lb kg mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. 82N 22,660 10 295 3646 1 1-1 1 9 ⁄ 16 — — 6734 22- 1 1 ⁄ 8 1753 5-9 13 957 45-9 1 ⁄ 2 1.
UNIT SIZE 50MP WEIGHT (See Note 3) AB C1 (See Note 2) C2 (See Note 2) DE F lb kg mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. 62L 16,550 751 1 3505 1 1 8 -6 9 957 3 8 -1 11 .
UNIT SIZE 50MP WEIGHT (See Note 3) AB C1 (See Note 2) C2 (See Note 2) DE F lb kg mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. 82N 22,400 10 295 3646 1 1 8 -1 1 9 ⁄ 16 9 — .
NOTICE TO RIGGERS UNIT SIZE WEIGHT A BCDE Unit 48MP Unit 50MP Exhaust Fan lb kg lb kg lb kg in. mm in. mm in. mm in. mm in. mm 62L 16,810 7 624 16,550 7 507 1675 760 71.25 1810 129.00 3277 1 12.44 2856 138.00 3505 N/A N/A 70M 18,060 8 190 17,800 8 074 1775 805 71.
Make Electrical Connections POWER SUPPL Y — Electrical characteristics of available power supply must agree with unit nameplate rating. Supply voltage must be within the limits shown in T able 5. Field W ire Routing — Field wiring is brought into the unit through the bottom of the control box.
Disconnect must be located within sight of the unit and read- ily accessible from the unit in compliance with NEC Article 440-14. All field wiring must comply with NEC and all local codes. Size wire based on MCA (Minimum Circuit Amps) value shown on the unit informative plate.
T able 5 — Electrical Data UNIT 48MP/ 50MP VOL T AGE 3 Ph, 60 Hz VOL T AGE RANGE COMP NO. A1 COMP NO. A2 COMP NO. B1 COMP NO. B2 CONDENSER FA N MOTORS EV APORA TOR F AN MOTOR POWER EXHAUST F AN MOTOR MCA MOCP Min Max RLA LRA RLA LRA RLA LRA RLA LRA Qty FLA Hp FLA Hp FLA Hp 62L 460 414 508 65.
Control Wiring — See Fig. 13 for sensor wiring con- nections to main and auxiliary control boxes. The recom- mended types of control wiring for 48/50MP unit devices are shown in T able 6. T able 6 — Recommended Sensor and Device Non-Shielded Cable MANUF ACTURER P ART NO.
LEGEND COM — Common SW — Switch T— T erminal TB — T erminal Block TH — Thermostat Heating Accessory Field Wiring *Constant volume applications only .
2 1 TB3 RED BLK TO PROCESSOR MODULE NO. 1 SENSOR 1 SENSOR 2 SENSOR 3 SENSOR 4 RED BLK RED BLK RED BLK RED BLK SP ACE TEMPERA TURE A VERAGING — 4 SENSOR APPLICA TION 1 2 RED BLK TB3 TO PROCESSOR MODULE NO.
8 9 10 12 11 10 DSIO2 J5 CHANNEL 60 TB3 FIELD CONTROL WIRING RED BLU ORN LEGEND T B— T erminal Block Field Wiring Component T erminal □ T erminal Block T erminal Fig. 15 — Heat Interlock Relay SR + ENTHALPY CONTROL REMOVE 620 Ω RESISTOR S + ENTHALPY SENSOR DIFFERENTIAL ENTHALPY SENSOR (RETURN AIR) Fig.
TO 24-V ISOLA TED TRANSFORMER BRN RED CFM ACY OUTDOOR AIR 24V 24V + - TB2 9 10 LEGEND T B— T erminal Block Field Wiring Component T erminal □ T erminal Block T erminal Fig. 21 — Outdoor Airflow Control Fig. 22 — Timed Discrete Output PSIO NO.
+ _ BLK WHT RED + _ BLK WHT RED + _ BLK WHT RED + _ BLK WHT RED DPT1 DPT2 SPT1 SPT2 BLK BLK BLK BLK BLK RED RED BRN BRN WHT WHT RES RES BLK RED 4 5 TB3 WHT WHT WHT WHT RES RES 7 8 10 11 13 14 10K OHM 1/2 W A TT 5% + - 10K OHM 1/2 W A TT 5% + - 10K OHM 1/2 W A TT 5% + - 10K OHM 1/2 W A TT 5% + - 16 17 PSIO NO.
Carrier Comfort Network Interface — The 48/50MP units can be connected to the CCN if desired. The communication bus wiring is supplied and installed in the field. It consists of shielded, 3-conductor cable with drain wire. The system elements are connected to the communication bus in a daisy chain arrangement.
The following color code is recommended: SIGNAL TYPE CCN BUS CONDUCTOR INSULA TION COLOR COMM1 PLUG PIN NO. 1 RED 1 GROUND WHITE 2 2 BLACK 3 NOTE: If a cable with a dif ferent color scheme is selec- ted, a similar color code should be adopted for the entire network.
Fig. 31 — Auxiliary Control Box Location (50MP70M Unit Shown) V ARIABLE FREQUENCY DRIVE DUCT PRESSURE TRANSDUCER BUILDING PRESSURE TRANSDUCER (HIDDEN) Fig.
Gas Piping (48 Series Units Only) — Unit is equipped for use with natural gas only . Installation must conform with local building codes, or in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.
Fan Isolator Adjustment — Remove shipping hard- ware from both the supply fan and the optional exhaust fan. The indoor fan shipping blocks on both the supply fan and the optional power exhaust fan (4 per fan) must be removed from each corner of the fan sled before starting unit.
PRE-ST ART -UP IMPOR T ANT : Before beginning Pre-Start-Up or Start- Up, review Start-Up Checklist at the center of this publication. The Checklist assures proper start-up of a unit and provides a record of unit condition, applica- tion requirements, system information, and operation at initial start-up.
1 1. Check supply fan belts, sheaves, and bearings. Check the lubrication of the fan and motor bearings. Check bear- ing and bearing set screws for tightness. Check sheave alignment and belt tension. Hand turn fan to ensure fan wheel does not rub on housing.
T able 8 — Fan Performance (Forward Curved) — 48/50MP62L* AIRFLOW (Cfm) A V AILABLE EXTERNAL ST A TIC PRESSURE (in. wg) 0.50 0.75 1.00 1.25 1.50 1.75 Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp 16,000 346 3.4 382 4.1 415 5.0 448 6.0 478 7.2 508 8.
T able 10 — Fan Performance (Forward Curved) — 48/50MP82N* AIRFLOW (Cfm) A V AILABLE EXTERNAL ST A TIC PRESSURE (in. wg) 0.50 0.75 1.00 1.25 1.50 1.75 Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp 22,000 293 6.2 326 7.7 359 9.3 392 1 1.2 425 13.
T able 12 — Fan Performance (Forward Curved) — 48/50MP10R* AIRFLOW (Cfm) A V AILABLE EXTERNAL ST A TIC PRESSURE (in. wg) 0.50 0.75 1.00 1.25 1.50 1.75 Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp 26,000 315 9.5 346 10.9 367 10.9 390 12.4 412 14.
T able 14 — Fan Performance (Air Foil) — 48/50MP70M* AIRFLOW (Cfm) A V AILABLE EXTERNAL ST A TIC PRESSURE (in. wg) 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp 18,000 668 5.
T able 16 — Fan Performance (Air Foil) — 48/50MP90P* AIRFLOW (Cfm) A V AILABLE EXTERNAL ST A TIC PRESSURE (in. wg) 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp 24,000 501 5.
T able 18 — Component Pressure Drop (in. wg) COMPONENT 22,000 26,400 30,000 34,000 38,000 42,000 45,800 48,200 52,000 HEA T EXCHANGER (48MP ONL Y) 0.
KEYP AD AND DISPLA Y MODULE (HSIO) CONFIGURA TION IMPOR T ANT : The HSIO keypad and display module is required for initial start-up of these units. All units are shipped in standby mode, and the HSIO should be used to change the unit to run mode. Once the unit is in run mode, the HSIO is not required for normal operation.
If the unit is being used in a CV application, then perform the following: 1. Enter the configuration function by pressing and . 2. Scroll down to unit type. TYPE 1 will be displayed. ENTER 3. Press and to change the unit type to CV . 4. Scroll down to data reset.
T able 25 — Basic Configuration Data SET POINT SUBFUNCTION DISPLA Y DEF AUL T RANGE Unit T ype TYPE 1 = V A V CV = 0, V A V = 1 CV Fan Mode F ANM 1 (Continuous) Auto = 0, Cont = 1 Economizer Minimu.
General NOTE: If unit is equipped with REMOTE ST AR T function, place the LOCAL/REMOTE switch in the LOCAL (Of f) position. 1. Put the ON/OFF switch in the ON position. Close the con- trol circuit breaker (CCB), which will energize the con- trol circuit and the crankcase heaters.
5. As actual SA T approaches CCSR value, stages are re- leased. The minimum time delay between stages on de- creasing demand is 90 seconds. NOTE: Demand for heating has priority and Master Loop will either terminate existing or prevent initiation of Cooling Cycle by issuing a CCSR at the maximum limit.
Control Loop Checkout The checkout and adjustment of control loops should only be done by certified Carrier Comfort Network (CCN) technicians. The following checkout procedure is of fered as a guide and presumes the user has obtained basic knowledge of controls through CCN training.
8. Once the submaster loop is adjusted, remove all forced values and proceed with verification and adjustment of master loop. 9. T o check the master loop: Create a demand in the master loop. For example: Force the actual space temperature to a value less than the heat- ing set point or greater than the cooling set point.
KEYP AD AND DISPLA Y MODULE (HSIO) IMPOR T ANT : The HSIO (human sensor input/output) keypad and display module is required for initial start-up of these units. All units are shipped in standby mode, and the HSIO must be used to change the unit to run mode.
T able 29 — HSIO Keypad and Display Module Functions and Subfunctions SUB FUNCTION NO. FUNCTIONS Status History Schedule Service Set Point T est 1 Current Alarms Alarms Occupied Mode Override (Unit).
T able 30 — V ariable Frequency Drive (VFD) Display DISPLA Y ACTION Fref Not used. Fout Displays the output frequency at which the VFD is cur- rently operating. This is a display only function. The user cannot change this displayed value. lout Displays the level of output current that the VFD is cur- rently producing.
UNIT CONTROL BOX — V iewed facing compressors, the control box is at the left end of the unit. Incoming power for controls, refrigerant system, and fan system enters through the control box. The control box contains power compo- nents and electronic controls.
MAIN BURNERS (48MP Only) — At the beginning of each heating season, inspect for deterioration or blockage due to corrosion or other causes. Observe the main burner flames.
Fig. 55 — Charging Chart — Unit 48/50MP62L Fig. 56 — Charging Chart — Unit 48/50MP70M Fig. 57 — Chrging Chart — Unit 48/50MP82N 48.
Charging with Unit Of f and Evacuated — Close liquid line service valve before charging. W eigh in charge shown in T able 1. Open liquid line service valve; start unit and allow it to run several minutes fully loaded. Check for a clear sight glass. Be sure clear condition is liquid and not vapor .
Replace the filter cores whenever the moisture/liquid in- dicator shows moisture in the system. Follow instructions on the packaging for the replacement cores for disassembling and reassembling the filter assem- blies and housings. Liquid Line Service V alve — Located immediately ahead of the filter drier , this valve has a 1 ⁄ 4 -in.
CYLINDER HEADS MUFFLER HIGH- PRESSURE SWITCH MOUNTING SPRING (HIDDEN) SIGHT GLASS LOW- PRESSURE SWITCH OIL EQUALIZER LINE CRANKCASE HEA TER RAIL SIGHT GLASS PRESSURE RELIEF VA LV E NOTE: Units 48/50MP62L compressors are pan mounted. Units 48/50MP70M and 82N compressors are mounted on rails.
PULLEY ALIGNMENT — For proper belt life, the motor and fan pulleys must be properly aligned. T o check, first turn of f unit power . Place a straightedge against the motor and fan pulleys. See Fig. 62. If the pulleys are properly aligned, the straightedge should be parallel to the belts.
CONDENSER-F AN MOTOR PROTECTION — Each condenser-fan motor is internally protected against over - temperature. They are also protected against a severe over - current condition by manual reset, calibrated trip, magnetic circuit breakers on a common circuit.
Processor Module(s) (PSIO) INPUTS — Each input channel has 3 terminals; 2 are used. OUTPUTS— Output of the PSIO module is 24 vdc or 4 to 20 mA dc. There are 3 terminals; 2 are used. REPLACING DEFECTIVE PSIO MODULES — The re- placement part number is printed on a label on the front of the PSIO module.
Hot Gas Bypass — An optional hot gas bypass system may be factory installed on circuit no. 1. This system will introduce discharge vapor from the compressor dischar ge line into the distributors and evaporator coil circuits on circuit no. 1 when suction pressures drop to damaging levels.
TROUBLESHOOTING AND DIAGNOSTICS PROBLEM SOLUTION COMPRESSOR DOES NOT RUN Contactor Open 1. Power off. 1. Restore power . 2. Fuses blown in field power circuit. 2. After finding cause and correcting, replace with correct size fuse. 3. Alarm tripped. 3.
TROUBLESHOOTING AND DIAGNOSTICS (cont) PROBLEM SOLUTION COMPRESSOR RUNNING BUT COOLING INSUFFICIENT Suction Pressure Low 1. Refrigerant charge low . 1. Add refrigerant. 2. Head pressure low . 2. Check refrigerant charge. 3. Air filters dirty . 3. Clean or replace filters.
Refer to Fig. 65 for IGC troubleshooting information. Fig. 65 — IGC Control (Heating) — 48MP Units Only LEGEND IGC — Integrated Gas Unit Controller PIC — Product Integrated Control 58.
.
P ACKAGED SERVICE TRAINING Packaged Service T raining programs are an excellent way to increase your knowledge of the equip- ment discussed in this manual, including: • Unit Familiarization • Inst.
ST ART -UP CHECKLIST MODEL NO.: DA TE: SERIAL NO.: TECHNICIAN: I. PRE-ST ART -UP: M VERIFY THA T UNIT IS LEVEL M VERIFY THA T ALL P ACKING MA TERIALS HA VE BEEN REMOVED FROM UNIT M LOOSEN ALL SHIPPING.
III. PRELIMINAR Y CHECKLIST ITEMS (cont) CHANGES TO DEF AUL T V ALUES M RECORD ALL CHANGES MADE TO F ACTOR Y DEF AUL T V ALUES IV . ST ART -UP CHECK EV APORA TOR F AN SPEED AND RECORD.
CONTROL CONFIGURA TION KEYBOARD ENTR Y DISPLA Y DESCRIPTION V ALUES IN [ ] INDICA TE F ACTOR Y DEF AUL TS LOG ON Enter password followed by ENTER LOGGEDON Logged on okay F ACT CFG Factory configuration TYPE X Unit type (0 = CV , 1 = V A V) [Default is 1] ENTER x TYPE X V erify unit type and change if necessary .
CONST ANT VOLUME CONTROL CONFIGURA TION KEYBOARD ENTR Y DISPLA Y DESCRIPTION F ACT CONFIG F ANM Fan Mode x ENTER F ANMx Select Fan Mode (Auto. = 0, Cont. = 1) [1] ECONOMIZER Configure Economizer SMG x.x Submaster Gain ENTER SMG 8.0 Set SMG to 8.0 [−7.
An important point after buying a device Carrier 48MPD (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 48MPD 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 48MPD - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Carrier 48MPD you will learn all the available features of the product, as well as information on its operation. The information that you get Carrier 48MPD will certainly help you make a decision on the purchase.
If you already are a holder of Carrier 48MPD, 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 48MPD.
However, one of the most important roles played by the user manual is to help in solving problems with Carrier 48MPD. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Carrier 48MPD 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
