Carrier 50EW- Manuals

Page 2 - UNIT LEVELING TOLERANCES DIMENSIONS*

NOTES:1. Unless otherwise specified, all dimensions are to out- side of part. 2. Roof curb accessory is shipped disassembled.3. All roof curb parts are to be 16 ga galvanized steel.4. Dimensions are in inches. Fig. 1 — Roof Curb (Sizes 024-034) UNIT LEVELING TOLERANCES DIMENSIONS* (Degrees and Inche...

Page 5 - UNIT SIZE; VFD — Variable Frequency Drive

NOTES:1. Weights include economizer (Std) 2. Center of gravity. 3. Do not locate adjacent units with discharge facing economizer inlet. Mini- mum clearances to be: Adjacent Units: 15 8 -0 9 Top of Units: No overhangCondenser Coil: 4 8 -0 9 Economizer Side: 6 8 -0 9 Filter Access Side: 10 8 -0 9 (for...

Page 8 - Step 2 — Rig and Place Unit —; Inspect unit for trans-; ALL PANELS MUST BE IN PLACE

Step 2 — Rig and Place Unit — Inspect unit for trans- portation damage. File any claim with transportation agency.Keep unit upright, and do not drop. Use spreader bars overunit to prevent sling or cable damage. Rollers may be usedto move unit across a roof. Level by using unit frame as areference; l...

Page 9 - Table 1 — Physical Data

Table 1 — Physical Data UNIT 50EJ,EK,EW,EY 024 028 030 034 NOMINAL CAPACITY (tons) 20 25 27 30 OPERATING WEIGHT (lb)* Unit Al/Al† 4016 4102 4102 4102 Al/Cu† 4236 4322 4322 4322 Roof Curb (14-in. curb) 365 365 365 365 COMPRESSOR Type Ckt 1 06D328 06D328 06D537 06D537 Ckt 2 06D818 06D328 06D328 06D537...

Page 11 - Table 2 — Evaporator Fan Motor Data; Step 3 — Field Fabricate Ductwork —

Table 2 — Evaporator Fan Motor Data UNIT SIZE MOTOR HP MOTOR SHAFT DIAMETER (in.) FAN SHAFTSPEED (rpm) MOTOR SHEAVE MOTOR SHEAVE PITCH DIAMETER (in.) BUSHING DIAMETER (in.) FAN SHEAVE FAN SHEAVE PITCH DIAMETER (in.) BUSHING DIAMETER (in.) BELT OUTSIDE BELT LENGTH BELT TENSION (Lb @ .24 in.) 024 5 1....

Page 12 - Step 6 — Controls Options —; Fig. 10 — Condensate Drain Connections

Step 6 — Controls Options — The control options that the units can provide are based on the following param-eters: CV (constant volume) or VAV (variable air volume)operation; stand-alone unit with field-supplied sensors in-stalled (CV or VAV); as a system via the Carrier ComfortSystem (TEMP or VVT);...

Page 13 - Fig. 11 — Field Control Remote Start/Stop

Features with sensor control of unit with computer access are: • 365 day timeclock with backup (supports minute, hour, day of week, date, month, and year) • daylight savings time function• occupancy control with 8 periods for unit operation• holiday table containing up to 18 holiday schedules• abili...

Page 14 - CCN

Fig. 12 — Control Board Diagram LEGEND CCN — Carrier Comfort Network R— Relay COM — Common SIO — Serial Input/Output D— Diode SW — Switch N.C. — Normally Closed T— T erminal N.O. — Normally Open *Where X is the unit control software version (1 or 2). 14

Page 15 - Step 7 — Make Electrical Connections; Fig. 13 — Field Power Wiring Connections

For units running Version 1.0 of the unit control software, network access software is required to enable occupied heat-ing. For units running Version 2.0 of the unit control soft-ware, occupied heating is enabled or disabled by the posi-tion of DIP switch no. 5. Additional features may be provided ...

Page 25 - Step 8 — Make Outdoor-Air Inlet Adjustments

Remote Field Control (Units Running Version 2.0 of UnitControl Software) — A switch closure across terminals Rand W1 on TB-3 will initiate the Occupied mode. This canbe done manually as well as through a field-suppliedtimeclock.Service Tool, Building Supervisor, and Comfort Works —Access to the cont...

Page 26 - Fig. 18 — Adding Seal Strip to; Fig. 20 — Adding Seal Strip to

NOTE: Before assembly of the economizer hood, check alongthe outer edges of the economizer assembly for any seal stripprotruding past the flanges. Trim the excess seal strip so thatit is flush with the economizer assembly flanges. 1. Apply black seal strip (provided in package) to outside top-edge o...

Page 30 - Step 10 — Install Accessories —; After all the factory-; VAV — Variable Air Volume; Fig. 32 — Pressure Transducer Locations

Step 10 — Install Accessories — After all the factory- installed options have been adjusted, install all field-installed accessories. Refer to the accessory installation in-structions included with each accessory. MOTORMASTER t III SENSOR LOCATION — Motor- master III sensor locations are shown in Fi...

Page 32 - Table 7 — VFD Set Point; PRESSURE

START-UP Use the following information and Start-Up Checklist on page CL-1 to check out unit PRIOR to start-up. Unit Preparation — Check that unit has been installed in accordance with these installation instructions and appli-cable codes. Compressor Mounting — Loosen the compressor hold- down bolts...

Page 33 - Power Exhaust —; Table 8 — Potentiometer Signal Levels

Power Exhaust — The optional non-modulating power exhaust (CV only) is a two-stage design where the operationof the exhaust fans is linked to economizer position. Whenthe supply fan is running and the economizer is 25% open,the base module closes contacts, activating 2 exhaust fans.When the economiz...

Page 36 - Table 12 — Fan Performance, 50EJ/EK024-034 — Vertical Discharge Units

Table 12 — Fan Performance, 50EJ/EK024-034 — Vertical Discharge Units FOR EW/EY UNITS, REDUCE NET AVAILABLE EXTERNAL STATIC PRESSURE BY 0.3 IN. WG AIRFLOW (Cfm) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp...

Page 38 - Table 14 — Fan Performance, 50EJ048 — Vertical Discharge Units; Table 15 — Air Quantity Limits

Table 14 — Fan Performance, 50EJ048 — Vertical Discharge Units FOR EW UNITS, REDUCE NET AVAILABLE EXTERNAL STATIC PRESSURE BY 0.5 IN. WG AIRFLOW (Cfm) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp 13,000 68...

Page 41 - Fig. 35 — Heat Interlock Relay Wiring

interlock relay signals for the air terminals to fully open. SeeFig. 35. In the Occupied mode, the indoor-fan motor willoperate continuously and the outdoor-air dampers will be inthe minimum position. In the Unoccupied mode, the indoor-fan motor will be off, but will energize upon the call for heat....

Page 42 - SERVICE

CAPACITY CONTROL, COOLING — The cooling capac-ity staging tables are shown in Tables 18 and 19. Table 18 — Cooling Capacity Staging Table CV Units with 2 Compressors STAGES 0 1 ECONOMIZER 2 3 Compressor 1 Off Off On On Compressor 2 Off Off Off On NOTE: On CV units that require additional unloading, ...

Page 43 - Fig. 38 — Evaporator-Fan Pulley Alignment

Cleaning — Inspect unit interior at beginning of each heat- ing and cooling season and as operating conditions require.Remove unit top panel and/or side panels for access to unitinterior. EVAPORATOR COIL — Clean as required with a commer-cial coil cleaner. CONDENSER COIL — Clean condenser coil annua...

Page 44 - Fig. 39 — Belt Tension Adjustment

Belt Tension Adjustment — To adjust belt tension: 1. Remove power to unit.2. Remove motor mount nuts and bolts.3. Loosen fan motor nuts. See Fig. 39.4. Turn motor jacking bolts to move motor mounting plate left or right for proper belt tension. A slight bow shouldbe present in the belt on the slack ...

Page 46 - TROUBLESHOOTING; Typical refrigerant circuiting diagrams are shown in Fig. 43-45.; Fig. 43 — Typical Refrigerant Circuiting

TROUBLESHOOTING Typical refrigerant circuiting diagrams are shown in Fig. 43-45. LEGEND FPS — Freeze Protection SwitchHPS — High-Pressure SwitchLPS — Low-Pressure Switch Fig. 43 — Typical Refrigerant Circuiting (50EJ,EK,EW,EY024-034) 46

Page 47 - Fig. 44 — Typical Refrigerant Circuiting

LEGEND FPS — Freeze Protection SwitchHPS — High-Pressure SwitchLPS — Low-Pressure Switch Fig. 44 — Typical Refrigerant Circuiting (50EJ,EK,EW,EY038,044) 47

Page 48 - Fig. 45 — Typical Refrigerant Circuiting

LEGEND FPS — Freeze Protection SwitchHPS — High-Pressure SwitchLPS — Low-Pressure Switch Fig. 45 — Typical Refrigerant Circuiting (50EJ,EW048) 48

Page 49 - There; Table 20 — Control Board LED Alarms

Diagnostic LEDs (Light-Emitting Diodes) — There are 3 LEDs (red, yellow, and green) on the lower right handside of the control board. The red light is used to checkunit operation and alarms. A constant pulse is normal unitoperation. A series of quick blinks indicates an alarm. Refer to Table 20 belo...

Page 50 - Tables 21-23 show the input and output channel designations.; Table 21 — I/O Channel Designations

Tables 21-23 show the input and output channel designations. Table 21 — I/O Channel Designations Base Module — CV TERMINAL NO. ASSIGNMENT T1-2 SPT (CCN) — 10K V Thermistor T3-4 STO (CCN) — 10K V Thermistor T5-6 OAT — 5K V Thermistor T7-8 SAT — 5K V Thermistor T9-10 — T11-12 SAT Reset — AI (2-10 vdc)...

Page 54 - 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,...

Page 56 - GENERAL

START-UP CHECKLIST (cont) GENERAL M ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS M ENSURE DRIVES OPERATE WITHIN LIMITS OF FAN PERFORMANCE TABLES HIGH-PRESSURE SWITCH SETTING PSIG LOW-PRESSURE SWITCH SETTING PSIG MOTOR PULLEY PART NUMBER FAN PULLEY PART NUMBER BELT PART NUMBER ...

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Installation Manual Carrier 50EW

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Manual Carrier 50EW

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Carrier Manuals