Page 1: Table Of Contents
50PG08---16 Single Package Rooftop units Electric Cooling with PURONR (R---410A) Refrigerant and Electromechanical Controls Installation Instructions TABLE OF CONTENTS Understand the signal words DANGER, WARNING, and CAUTION. These words are used with the safety- -alert symbol. SAFETY CONSIDERATIONS ......
Page 2: Installation
Refer to Accessory Roof Curb Installation Instructions for additional information as required. When accessory roof curb is used, unit may be installed on class A, B, or C roof covering material. Carrier roof curb accessories are for flat roofs or slab mounting.
Page 7 N - NOTICE TO R GGERS: ACCESS PANEL MUST BE IN PLACE WHEN RIGGING. Hook rigging shackles through holes in base rail, as shown in Detail A. Holes in base rails are centered around the unit center of gravity. Use wooden top skid, when rigging, to prevent rigging straps from damaging unit.
Page 8 Table 1—Physical Data (50PG08-14) BASE UNIT 50PG NOMINAL CAPACITY (Tons) 12.5 OPERATING WEIGHT (lb) Unit* 1098 1105 1199 1310 Economizer Vertical Horizontal Roof Curb 14-in. 24-in. COMPRESSOR Fully Hermetic Scroll Quantity Oil Type Sys A Copeland 3MA Copeland 3MA Copeland 3MA...
Page 9 Table 2—Physical Data (50PG16) BASE UNIT 50PG NOMINAL CAPACITY (Tons) 15.0 OPERATING WEIGHT (lb) Unit* 1771 Economizer Humidi--MiZert System Roof Curb 14--in. 24--in. COMPRESSOR Fully Hermetic Scroll Quantity Oil Type Sys A Copeland 3MA Sys B Copeland 3MA Sys C Copeland 3MA Number of Refrigerant Circuits Oil (oz) Sys A...
Page 10 Table 2 — Physical Data (50PG16) (Cont) EVAPORATOR FAN (Continued) Belt…Type Mid--Low High Pulley Center Line Distance Min. (in.) 14.2 Mid--Low 10.8 High Pulley Center Line Distance Max. (in.) 10.8 Mid--Low 14.2 High Speed Change (rpm) Mid--Low High Movable Turns Mid--Low High Factory Pulley Setting (rpm)
Page 11: Step 4 -Field Fabricate Ductwork
Installation Onto Curb Units with electric heat require a 1-in. clearance for the first 24 in. of ductwork. Outlet grilles must not lie directly below unit The 50PG units are designed to fit on the accessory full perimeter discharge. curb. In either case, correct placement of the unit onto the curb is NOTE: A 90-degree elbow must be provided in the supply critical to operating performance.
Page 12: Step 7 -Make Electrical Connections
ELECTRIC BAROMETRIC HEAT ACCESS FILTER ACCESS RELIEF DAMPER PANEL HOOD DOOR BASEPAN CONNECTIONS ACCESS PANEL C06315 Fig. 6 --- Panel and Filter Locations (50PG08- -14) ECONOMIZER HOODS CONDENSER COIL ACCESS PANEL OUTDOOR AIR SCREENS (HIDDEN) ELECTRIC BAROMETRIC HEAT ACCESS RELIEF DAMPER...
Page 13 INSERT SIDE DRAIN DRILL 5/8” DIA. (0.625 mm) HOLE PLUG FOR DOWN THRU FOR DOWN DRAIN USE. DRAIN USE. C10321 Fig. 8 --- Condensate Drain Pan OPTIONAL UNIONS TO ALLOW FOR CONDENSATE PAN REMOVAL 4" (102mm) CONDENSATE PAN ACCESS PANEL C06234 Fig.
Page 14 Field Control Wiring (W1) ON (W1 AND W2) ON Unit can be controlled with a Carrier-approved accessory thermostat. Install thermostat according to the installation instructions included with accessory. Locate thermostat assembly Settings may be changed slightly to provide a greater degree of on a solid interior wall in the conditioned space to sense average comfort for a particular installation.
Page 15 Table 3—Electrical Data — Units Without Optional Powered Convenience Outlet VOLTAGE COMPRESSOR DISCONNECT NOMINAL ELECTRIC HEAT POWER SUPPLY POWER RANGE (EA.) SIZE UNIT POWER EXHAUST 50PG TYPE CRHEATER NOMINAL SUPPLY MIN MAX MOCP† PART NO. VOLTS-PH-HZ — — —/— 38.5/ 38.5 50/ 50 40/ 40 212/212...
Page 16 Table 3 — Electrical Data — Units Without Optional Powered Convenience Outlet (cont) VOLTAGE COMPRESSOR DISCONNECT NOMINAL ELECTRIC HEAT POWER SUPPLY POWER RANGE (EA.) SIZE POWER UNIT EXHAUST 50PG SUPPLY TYPE CRHEATER NOMINAL MIN MAX MOCP† VOLTS-PH-HZ PART NO. — —...
Page 17 LEGEND Example: Supply voltage is 460-3-60 --- Full Load Amps HACR --- Heating, Air Conditioning and Refrigeration --- Indoor (Evaporator) Fan Motor --- Locked Rotor Amps --- Minimum Circuit Amps MOCP --- Maximum Overcurrent Protection --- National Electrical Code AB = 224 v --- Outdoor (Condenser) Fan Motor BC = 231 v --- Rated Load Amps...
Page 18 Table 3 — Electrical Data — Units Without Optional Powered Convenience Outlet (cont) VOLTAGE COMPRESSOR DISCONNECT NOMINAL ELECTRIC HEAT POWER SUPPLY POWER RANGE (EA.) SIZE UNIT POWER EXHAUST 50PG TYPE CRHEATER NOMINAL SUPPLY MIN MAX MOCP† PART NO. VOLTS-PH-HZ — —...
Page 19 Table 3 — Electrical Data — Units Without Optional Powered Convenience Outlet (cont) COMPRESS VOLTAGE DISCONNECT NOMINAL ELECTRIC HEAT POWER SUPPLY POWER RANGE SIZE UNIT POWER (EA.) EXHAUST 50PG TYPE SUPPLY CRHEATER NOMINAL VOLTS-PH-HZ MIN MAX MOCP† PART NO. — —...
Page 20 LEGEND Example: Supply voltage is 460-3-60 --- Full Load Amps HACR --- Heating, Air Conditioning and Refrigeration --- Indoor (Evaporator) Fan Motor --- Locked Rotor Amps --- Minimum Circuit Amps MOCP --- Maximum Overcurrent Protection --- National Electrical Code AB = 224 v --- Outdoor (Condenser) Fan Motor BC = 231 v --- Rated Load Amps...
Page 21 Table 3 — Electrical Data — Units Without Optional Powered Convenience Outlet (cont) VOLTAGE COMPR COMPR COMPR POWER NOMINAL ELECTRIC HEAT POWER SUPPLY DISCONNECT SIZE RANGE NO. 1 NO. 2 NO. 3 EXHAUST POWER UNIT SUPPLY 50PG TYPE CRHEATER NOMINAL MAX RLA LRA RLA LRA RLA LRA QTY FLA MOCP...
Page 22 Table 4—Electrical Data — Units With Optional Powered Convenience Outlet VOLTAGE COMPRESS DISCONNECT NOMINAL ELECTRIC HEAT POWER SUPPLY POWER RANGE SIZE POWER UNIT EXHAUST 50PG SUPPLY TYPE CRHEATER NOMINAL MIN MAX RLA MOCP† VOLTS-PH-HZ PART NO. — — —/— 43.3/ 43.3 50/ 50 46/ 46 217/217...
Page 23 Table 4 — Electrical Data — Units With Optional Powered Convenience Outlet (cont) VOLTAGE DISCONNECT NOMINAL COMPRESSOR ELECTRIC HEAT POWER SUPPLY POWER RANGE SIZE POWER UNIT EXHAUST 50PG SUPPLY TYPE CRHEATER NOMINAL MIN MAX MOCP† VOLTS-PH-HZ PART NO. — — —/—...
Page 24 LEGEND Example: Supply voltage is 460-3-60 --- Full Load Amps HACR --- Heating, Air Conditioning and Refrigeration --- Indoor (Evaporator) Fan Motor --- Locked Rotor Amps --- Minimum Circuit Amps MOCP --- Maximum Overcurrent Protection --- National Electrical Code AB = 224 v --- Outdoor (Condenser) Fan Motor BC = 231 v --- Rated Load Amps...
Page 25 Table 4 — Electrical Data — Units With Optional Powered Convenience Outlet (cont) VOLTAGE DISCONNECT NOMINAL COMPRESSOR ELECTRIC HEAT POWER SUPPLY POWER RANGE SIZE POWER UNIT EXHAUST 50PG SUPPLY TYPE CRHEATER NOMINAL MIN MAX MOCP† VOLTS-PH-HZ PART NO. — — —/—...
Page 26 Table 4 — Electrical Data — Units With Optional Powered Convenience Outlet (cont) VOLTAGE NOMINAL COMPRESSOR ELECTRIC HEAT POWER SUPPLY DISCONNECT SIZE POWER RANGE POWER UNIT EXHAUST 50PG SUPPLY TYPE CRHEATER NOMINAL MIN MAX MOCP† VOLTS-PH-HZ PART NO. — — —/—...
Page 27 LEGEND Example: Supply voltage is 460-3-60 --- Full Load Amps HACR --- Heating, Air Conditioning and Refrigeration --- Indoor (Evaporator) Fan Motor --- Locked Rotor Amps --- Minimum Circuit Amps MOCP --- Maximum Overcurrent Protection --- National Electrical Code AB = 224 v --- Outdoor (Condenser) Fan Motor BC = 231 v --- Rated Load Amps...
Page 28 Table 4 — Electrical Data — Units With Optional Powered Convenience Outlet (cont) VOLTAGE COMPR COMPR COMPR POWER DISCONNECT NOMINAL ELECTRIC HEAT POWER SUPPLY RANGE NO. 1 NO. 2 NO. 3 EXHAUST SIZE UNIT POWER 50PG SUPPLY CRHEATER NOMINAL MIN MAX RLA LRA RLA LRA RLA LRA FLA QTY FLA MOCP TYPE (V-PH-HZ)
Page 29: Step 8 -Optional Economi$Er Iv
Size 16 Only — Loosen screws securing the clip on top of C06260 the flange of each opening. Rotate clip 180 degrees and Fig. 15 --- Hood Installation (50PG08- -14) tighten screw. Install 1-in. filter provided by inserting under the clip on the flange and letting filter drop behind bracket holding barometric relief hoods.
Page 30 EconoMi$er IV Standard Sensors different control modes, and a number of accessories are available. Refer to Table 5. The EconoMi$er IV is supplied from Outdoor Air Temperature (OAT) Sensor the factory with a mixed air temperature sensor and an outdoor The outdoor air temperature sensor is a 10 to 20 mA device used air temperature sensor.
Page 31 LEGEND ACCY — Accessory FIOP — Factory-Installed Option — Indoor Air — Indoor Air Quality — Outdoor Air — Outdoor Air Temperature Sensor — Plug — Return Air Temperature Sensor — Supply (Mixed) Air Temperature Sensor — Terminal Block C06163 Fig.
Page 32 Table 5—EconoMi$er IV Sensor Usage ECONOMI$ER IV WITH OUTDOOR AIR ECONOMI$ER IV WITH SINGLE DRY BULB SENSOR ENTHALPY SENSOR APPLICATION Accessories Required Accessories Required None. The outdoor air dry bulb Outdoor Air Dry Bulb CRTEMPSN002A00* sensor is factory installed. Differential Dry Bulb CRTEMPSN002A00* (2) CRTEMPSN002A00* None.
Page 33 Adjust the minimum position potentiometer to allow the Thermostats minimum amount of outdoor air, as required by local codes, to The EconoMi$er IV control works with conventional thermostats enter the building. Make minimum position adjustments with at that have a Y1 (cool stage 1), Y2 (cool stage 2), W1 (heat stage least 10_F temperature difference between the outdoor and 1), W2 (heat stage 2), and G (fan).
Page 34 NOTE: Economizer damper pressure drop is with outdoor air damper totally closed and return air damper fully open. C06248 Fig. 25 --- Pressure Drop for Vertical Economizer (50PG08- -14) NOTE: Economizer damper pressure drop is with outdoor air damper totally closed and return air damper fully open.
Page 35 NOTE: Economizer damper pressure drop is with outdoor air damper totally closed and return air damper fully open. C06251 Fig. 27 --- Pressure Drop for Horizontal Economizer (50PG08- -14) NOTE: Economizer damper pressure drop is with outdoor air damper totally closed and return air damper fully open.
Page 36: Step 9 -Install All Accessories
Consult the The enthalpy sensor or differential enthalpy sensor is installed on Carrier Price Pages or RTU (rooftop unit) Building software for the equipment to determine economizer operation. The high accessory package numbers for particular applications. For...
Page 37: Pre-Start-Up
PRE-START-UP c. Make sure that condensate drain trap is filled with water to ensure proper drainage. WARNING d. Make sure that all tools and miscellaneous loose parts have been removed. e. Make sure that the start-up checklist has been performed ELECTRICAL OPERATION HAZARD and filled out.
Page 38 Heating, Units Without Economizer until space temperature exceeds thermostat setting. Units are NOTE: The 50PG08-16 units have 2 stages of electric heat. equipped with Cycle-LOC™ protection device. Unit shuts down on any safety trip and remains off; an indicator light on the When the thermostat calls for one stage of heating, W1 is thermostat comes on.
Page 39 Cooling, Units With Economi$er IV On the initial power to the EconoMi$er IV control, it will take the damper up to 2 minutes before it begins to position itself. Any When free cooling is not available, the compressors will be change in damper position will take up to 30 seconds to initiate.
Page 40 Table 7—Fan Performance — 50PG08 Vertical Units Available External Static Pressure (in. wg) AIRFLOW (Cfm) 2250 0.32 0.43 0.54 0.66 0.79 2400 0.37 0.48 0.60 0.73 0.86 2550 0.43 0.55 0.67 0.80 0.94 2700 0.49 0.61 0.74 0.88 1.02 2850 0.56...
Page 41 Table 9—Fan Performance — 50PG012 Vertical Units Available External Static Pressure (in. wg) Airflow (Cfm) 3000 0.65 0.79 0.93 1.08 1.23 3200 0.77 0.91 1.06 1.21 1.37 3400 0.90 1.05 1.21 1.37 1.53 3600 1.04 1.20 1.36 1.53 1.71 3800 1.20 1.37 1.54...
Page 42 Table 11—Fan Performance — 50PG016 Vertical Units Available External Static Pressure (in. wg) Airflow (Cfm) 4500 0.71 1.03 1.36 1.68 2.00 4800 0.82 1.15 1.50 1.85 2.19 5100 0.94 1.29 1.66 2.03 2.40 5400 1.08 1.43 1.83 2.22 2.61 5700 1.24 1.59 2.01...
Page 43 Table 12—Fan Performance — 50PG08 Horizontal Units Available External Static Pressure (in. wg) Airflow (Cfm) 2250 0.26 0.36 0.47 0.58 0.71 2400 0.30 0.41 0.52 0.64 0.77 2550 0.34 0.46 0.58 0.70 0.83 2700 0.39 0.51 0.64 0.77 0.91 2850 0.45...
Page 44 Table 14—Fan Performance — 50PG012 Horizontal Units Available External Static Pressure (in. wg) Airflow (Cfm) 3000 0.53 0.66 0.80 0.94 1.09 3200 0.62 0.77 0.91 1.06 1.21 3400 0.72 0.88 1.03 1.19 1.35 3600 0.84 1.00 1.17 1.33 1.50 3800 0.96 1.14 1.31...
Page 45 1. Values include losses for filters, unit casing, and wet coils. 3. Use of a field-supplied motor may affect wire size. Contact See unit Product Data for accessory/FIOP static pressure the local Carrier representative for details. information. 4. Interpolation is permissible. Do not extrapolate. (Belt 2.
Page 46 230 and 460 volt, 60 Hz power. If a motor does not fit into these specifications, the motor does not have to be replaced by an EPACT-compliant energy-efficient motor. Variable-speed motors are exempt from EPACT compliance requirements. Therefore, the indoor fan motors for Carrier 50PG units are exempt from...
Page 47: Service
This cleaner is result. available from Carrier Replacement parts division as part number P902-0301 for a one gallon container, and part number Cleaning P902-0305 for a 5 gallon container. It is recommended that all...
Page 48 Avoid the use of: 8. Interior and exterior finned areas must be thoroughly cleaned. coil brighteners 9. Finned surfaces should remain wet with cleaning solution acid cleaning prior to painting for 10 minutes. high pressure washers 10. Ensure surfaces are not allowed to dry before rinsing. Reapplying cleaner as needed to ensure 10-minute poor quality water for cleaning saturation is achieved.
Page 49 2. Cover area in front of the unit service panel with a terry 2. Loosen nuts on the 4 carriage bolts in the mounting base. cloth shop towel to absorb lubricant spills and prevent Using adjusting bolts and plate, slide motor and remove run-offs.
Page 50 Refrigerant Charge Amount of refrigerant charge is listed on unit nameplate. Refer to Carrier GTAC II; Module 5; Charging, Recovery, Recycling, and Reclamation section for charging methods and procedures. Unit panels must be in place when unit is operating during charging procedure.
Page 51 P P r r e e ss ss u u r r e e , , [ [ p p sig sig ] ] C06265 Fig. 33 --- Charging Chart 50PG08 and 09...
Page 52 Each control circuit is protected against overcurrent by a 3.2 amp circuit breaker. Breaker can be reset. If it trips, determine cause of trouble before resetting. (See Fig. 37 and 38.) Replacement Parts A complete list of replacement parts may be obtained from any Carrier distributor upon request.
Page 53 C06317 Fig. 37 --- Typical Low Voltage Control Schematic...
Page 54 LEGEND FOR FIG. 37 AND 38 — Adjustable Heat Anticipator — Ambient Lockout ---A — Circuit A ---B — Circuit B — Compressor Contactor — Capacitor — Compressor Circuit Breaker — Cooling Compensator — Crankcase Heater CCHR — Crankcase Heater Relay CCHS —...
Page 55: Troubleshooting
TROUBLESHOOTING Unit Troubleshooting - - See Table 22 for cooling troubleshooting. See Table 23 for unit heating troubleshooting. Table 22—Cooling Service Analysis PROBLEM CAUSE REMEDY Compressor and Condenser Fan Power failure. Call power company. Will Not Start. Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker.
Page 56 Table 23—Heating Service Analysis PROBLEM CAUSE REMEDY No Heat. Power failure. Call power company. Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker. CB1, CB2, CB3. Thermostat not calling for heating. Check thermostat. No 24 vac at primary contactor. Check transformer and circuit breaker.
Page 57 Mixed Air Input Phase Loss Protection To check mixed air input: The phase loss protection option will monitor the three-phase electrical system to provide phase reversal and phase loss 1. Make sure EconoMi$er IV preparation procedure has been protection. performed. Phase Reversal Protection 2.
Page 58: Unit Start- -Up Checklist
GENERAL j ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS Catalog No: 50PG ---39SI Copyright 2010 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 03/10 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

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