Carrier 48MA/50ME016-040- Manuals

Page 3 - Fig. 1 — Base Unit Physical Data and Dimensions 48MA Units

CONDENSER SECTION AIRFLOW CONN — Connection NOTES:1. Space required for service and airflow all around and above unit is 36 inches. 2. For additional information see Fig. 4.3. Center of gravity is within 6 in. radius of geo- metric center of unit. 4. Maximum allowable pitch of unit is 1 ⁄ 2 in. per ...

Page 4 - Fig. 2 — Base Unit Physical Data and Dimensions 50ME Units

CONDENSER SECTION AIRFLOW CONN — Connection NOTES:1. Space required for service and airflow all around and above unit is 36 inches. 2. For additional information see Fig. 5.3. Center of gravity is within 6 in. radius of geo- metric center of unit. 4. Maximum allowable pitch of unit is 1 ⁄ 2 in. per ...

Page 5 - Fig. 3 — Roof Curb Detail

Rigging Unit — Inspect unit for shipping damage, and file any damage claim immediately with transportationcompany. Lift unit with cables and spreader bars, using lifting brack- ets provided (Fig. 1 and 2). Lift one unit at a time, keep unitupright, and do not drop. Unit weights are given in Table 1....

Page 6 - Table 1 — Physical Data

Table 1 — Physical Data UNIT 48MA/50ME 016 024 028 030 034 040 Zone Modules (Quantity) 8 8 10 10 12 12 Nominal Cooling Capacity (tons) 15 20 25 28 30 37 OPERATING WEIGHT (lb) Base Unit 48MA 3395 3815 4075 4080 5340 5710 Base Unit 50ME (with electric heat) 2995 3415 3675 3680 4900 5270 Roof Curb 506 ...

Page 7 - Fig. 4 — Roof Curb Physical Data and Dimensions 48MA Units

EVAPORATOR (ZONE MODULE) AIRFLOW CONN — Connection *Not used on 48MA016,024 (8 zone module units). NOTES:1. For additional information, see Table 1 and Fig. 1.2. Maximum allowable unit pitch is 1 ⁄ 2 in. per 10 ft in any direction. 3. Remove shipping brace before assembling curb section (location sh...

Page 8 - Fig. 5 — Roof Curb Physical Data and Dimensions 50ME Units

EVAPORATOR (ZONE MODULE) AIRFLOW CONN — Connection *Not used on 50ME016,024 (8 zone module units). NOTES:1. For additional information, see Table 1 and Fig. 2.2. Maximum allowable unit pitch is 1 ⁄ 2 in. per 10 ft in any direction. 3. Remove shipping brace before assembling curb section (location sh...

Page 9 - Condensate Drains —; Fig. 6 — Shipping Shield Locations; Fig. 7 — Field-Fabricated Zone Duct Plenum Detail

Condensate Drains — Pipe nipples covered with foam rubber insulation are shipped in unit return air filter section(6 nipples in units 48MA, 4 nipples in units 50ME). Installa nipple in each drain connection on both sides of unit. SeeFig. 1 and 2 for drain locations. Be sure foam rubber sealsspace be...

Page 10 - Field Power Supply Wiring —; — Ground; Fig. 9 — Field Power Supply Details

Unit has factory-installed gas shutoff valves. Install gas shutoff valve external to unit if required by code (Fig. 8).After piping is complete, pressurize gas line and check forleaks with soap and water solution. Do not use an open flame when checking for gas leaks. Optional Glycol Connections (50M...

Page 11 - Table 2 — Unit 48MA Electrical Data

Use the following formula to determine the percent volt- age imbalance. % Voltage Imbalance: max voltage deviation from average voltage = 100 × average voltage EXAMPLE: Supply voltage is 460-3-60. AB = 452 vBC = 464 vAC = 455 v 452 + 464 + 455 Average Voltage = 3 1371 = 3 = 457 Determine maximum dev...

Page 12 - Table 3 — Unit 50ME Electrical Data; Table 4 — Electric Resistance Heater Data

Table 3 — Unit 50ME Electrical Data UNIT 50ME VOLTAGE (3 Ph, 60 Hz) VOLTAGE RANGE COMP NO. 1 COMP NO. 2 OFM FLA IFM POWER SUPPLY Min Max RLA LRA RLA LRA No. 1 No. 2 No. 3 Hp FLA MCA MOCP 016 208/230 187 254 63.6 266 — — 6.2 6.6 — 5 16.2 109.6 125 460 414 508 28.6 120 3.0 6.6 49.5 60 575 518 632 22.8...

Page 13 - Table 5 — Unit 50ME Electrical Application Data

Table 5 — Unit 50ME Electrical Application Data UNIT 50ME NOMINALVOLTAGE kW (Unit Total) MCA Cooling Heating Circuit Unit Common Feed Size IFM Hp 1 2 016 5 208/230 43/ 5357/ 7087/106 109.8/109.8 150.0/165.6200.0/220.9150.0/165.8 —— 150.0/165.8 184.8/192.6216.7/237.6316.7/348.3 460 5370 106 49.5 82.9...

Page 14 - Field Control Wiring; Fig. 10 — Zone Control Board Component Location

Field Control Wiring ZONE THERMOSTATS — Install a Carrier approved ac-cessory zone thermostat assembly in each zone according toinstallation instructions included in the accessory. Locate eachthermostat assembly in the space where it will sense averagezone temperature. Route thermostat cable or equi...

Page 34 - Fig. 29 — Remote Control Panel Accessory Connections

ACCESSORY REMOTE CONTROL PANEL — This central-station control can be set to override zone thermostat modesettings to lock out heating or cooling for the entire unit. TheDAY/NIGHT switch and damper position knob provide in-space, central control of damper position. Panel also housesthe filter light t...

Page 35 - Fig. 30 — Humidistat Connections

The heating thermostat energizes a 115-v solenoid by means of a gas valve relay and the pilot lights. The main burnercomes on after the pilot is proven. The safety switches (airflow switches 1 and 2, pilot flame sensor, door switch, and limit switches) are in series withthe gas valve. Gas Heat Light...

Page 37 - Fig. 33 — Spoiler Screw Location

Fig. 33 — Spoiler Screw Location LEGEND COMPR — CompressorCOND — Condensing *AFS1 deenergizes control circuit if loss of indoor air occurs.†Factory-supplied option. Fig. 34 — Major Component Identification (Typical 10-Zone Unit Shown; 8-Zone Units Similar) 37

Page 40 - Fig. 36 — Compressor Capacity Control

TO ADD OR REMOVE OIL1. Close liquid line and hot gas bypass shutoff valves. See Fig. 31. 2. Pump down compressor and close suction and discharge service valves. Recover remaining refrigerant in compressor. 3. Add oil through oil filler plug.4. To remove oil, remove crankcase oil drain plug, and drai...

Page 41 - Condenser Fans; Reverse this procedure for reassembly.; Evaporator Fans and Motor; move the fan drive pulley.; Fig. 37 — Motormaster

Condenser Fans Shut off service switch to deenergize condenser-fanmotors. ADJUSTMENT — Remove fan guard from top of unit. Re-move rubber hubcap from fan hub and loosen fan hub set-screws. Adjust fan height using a straight edge laid acrossfan deck venturi (Fig. 38). Tighten setscrews and replace rub...

Page 42 - Zone Module Transformers —; When replacing these; Optional Economizer —; OPERATION; Optional Exhaust Damper —; When the return air damper is 25% closed, the exhaust; Replacement Parts —; A complete list of replacement; Shutter Position

PULLEY REMOVAL1. Shut off unit power.2. Loosen fan motor mounting plate and remove belt.3. Loosen pulley setscrew.4. Slide pulley off shaft. Reverse steps 1-4 to install new pulley. PULLEY ALIGNMENT — Loosen fan pulley setscrews andslide fan pulley along fan shaft for parallel alignment. Makeangular...

Page 43 - Fig. 40 — Economizer and Exhaust Damper Assemblies, Exploded View

LEGEND 1 — Bearing Liner2 — Speed Nut ( 5 ⁄ 16 in.) 3 — Washer4 — Rivet5 — Speed Nut ( 7 ⁄ 16 in.) 6 — Speed Nut ( 1 ⁄ 4 in.) 7 — Damper Lever8 — Linkage Bar9 — Linkage Rod (15 in.) 10 — Linkage Rod (22 in.) Airflow Direction Fig. 40 — Economizer and Exhaust Damper Assemblies, Exploded View 43

Page 46 - PACKAGED SERVICE TRAINING

PACKAGED SERVICE TRAINING Our packaged service training programs provide an excellent way to increase your knowledge of theequipment discussed in this manual. Product programs cover: • Unit Familiarization• Installation Overview • Maintenance• Operating Sequence A large selection of product, theory,...