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50PG16
Single Package Rooftop Units
Electric Cooling with PURONR (R---410A) Refrigerant
and COMFORTLinkt Controls
IMPORTANT: This installation instruction contains basic unit
installation information including installation of field control
devices. For information on unit start-up, service, and operation,
refer to the unit Controls, Start-Up, Operation, Service, and
Troubleshooting Instructions also enclosed in the unit literature
packet.
TABLE OF CONTENTS
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SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified service personnel should install, repair, or
service air-conditioning equipment.
Untrained personnel can perform the basic maintenance functions
of cleaning coils and filters and replacing filters. All other
operations should be performed by trained service personnel.
When working on air-conditioning equipment, observe precautions
in the literature, tags and labels attached to the unit, and other
safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for unbrazing operations. Have fire extinguishers
available for all brazing operations.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before performing service or maintenance operations on
unit, turn off main power switch to unit. There may be
more than one disconnect switch.
Installation Instructions
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UNIT OPERATION AND SAFETY HAZARD
Failure to follow this caution may result in personal injury
or equipment damage.
Puronr (R-410A) refrigerant systems operate at higher
pressures than standard R-22 systems. Do not use R-22
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service equipment or components on Puronr refrigerant
1
equipment.
1-16
1
!
3
FIRE HAZARD
7
Failure to follow this warning could result in personal
7
injury or death.
7
Do not store or use gasoline or other flammable vapors and
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liquids in the vicinity of this or any other appliance.
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16
IMPORTANT: Units have high ambient operating limits. If limits
are exceeded, the units will automatically lock the compressor out
16
of operation.
compressor.
Step 1 - Provide Unit Support
Roof Curb
Assemble or install accessory roof curb in accordance with
instructions shipped with this accessory. See Fig. 1. Install
insulation, cant strips, roofing, and counter flashing as shown.
Ductwork can be installed to roof curb before unit is set in place.
Ductwork must be attached to curb and not to the unit. Curb must
be level. This is necessary to permit unit drain to function properly.
Unit leveling tolerance is ±
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.
CAUTION
WARNING
Manual reset will be required to restart the
INSTALLATION
1
/
in. per linear ft in any direction.
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Summary of Contents for Carrier 50PG16
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Page 1: Table Of Contents
When accessory roof curb is used, unit may be installed on class A, B, or C roof covering WARNING material. Carrier roof curb accessories are for flat roofs or slab mounting. ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. -
Page 3: Installation
IMPORTANT: The gasketing of the unit to the roof curb is critical Do not drop unit; keep upright. Use spreader bars or top crating for a watertight seal. Install gasket with the roof curb as shown in over unit to prevent sling or cable damage. Rollers may be used to move unit across a roof. - Page 4 Table 1 – Physical Data BASE UNIT 50PG NOMINAL CAPACITY (Tons) 15.0 OPERATING WEIGHT (lb) Unit* 1771 Economizer Vertical Horizontal Humidi-MiZer™ 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...
- Page 5 Table 1 — Physical Data (cont) BASE UNIT 50PG (cont) EVAPORATOR FAN (cont) Centrifugal Type, Belt Drive Motor Pulley Pitch Diameter Min (in.) Mid-Low High Motor Pulley PItch Diameter Max (in.) Mid-Low High Fan Pulley Pitch Diameter 10.2 Mid-Low High Nominal Motor Shaft Diameter (in.) Mid-Low High...
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Page 7: Step 3 - Field Fabricate Ductwork
CAUTION ECONOMIZER UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage. Do not slide unit to position when it is sitting on the curb. Curb gasketing material may be damaged and leaks may result. Step 3 — Field Fabricate Ductwork On vertical units, secure all ducts to roof curb and building structure. - Page 8 ECONOMIZER HOODS CONDENSER COIL ACCESS PANEL OUTDOOR AIR SCREENS (HIDDEN) ELECTRIC BAROMETRIC HEAT ACCESS RELIEF DAMPER PANEL HOODS FILTER ACCESS DOOR ELECTRICAL OPTIONS PANEL CONTROL BOX BASEPAN AND COMPRESSOR CONNECTIONS ACCESS DOOR ACCESS PANEL C06309 Fig. 6 - - Panel and Filter Locations SIDE DRAIN PLUG BOTTOM DRAIN...
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Page 9: Step 6 - Make Electrical Connections
OPTIONAL UNIONS TO ALLOW FOR CONDENSATE PAN REMOVAL 4" (102mm) CONDENSATE PAN ACCESS PANEL C06311 Fig. 8 - - External Trap for Condensate Drain All units must have an external trap for condensate drainage. Install a trap at least 4-in. deep and protect against freeze-up. If drain line is installed downstream from the external trap, pitch the line away from the unit at 1-in. - Page 10 Table 2 – Electrical Data — Units Without Optional Powered Convenience Outlet VOLTAGE COMPR COMPR COMPR POWER NOMINAL ELECTRIC HEAT POWER SUPPLY DISCONNECT SIZE CRSINGLE RANGE NO. 1 NO. 2 NO. 3 EXHAUST POWER UNIT WIRING PART NO. SUPPLY CRHEATER NOMINAL 50PG TYPE...
- Page 11 Table 3 – Electrical Data — Units With Optional Powered Convenience Outlet VOLTAGE COMPR COMPR COMPR POWER NOMINAL ELECTRIC HEAT POWER SUPPLY DISCONNECT SIZE CRSINGLE RANGE NO. 1 NO. 2 NO. 3 EXHAUST POWER UNIT WIRING PART NO. SUPPLY 50PG TYPE FIG.
- Page 12 Example: Supply voltage is 460-3-60 LEGEND --- Full Load Amps AB = 224 v HACR --- Heating, Air Conditioning and Refrigeration BC = 231 v --- Indoor --- Fan Motor AC = 226 v 224 + 231 + 226 --- Locked Rotor Amps Average Voltage = --- Minimum Circuit Amps MOCP --- Maximum Overcurrent Protection...
- Page 13 Without Optional Humidi- -MiZert Adaptive The unit can be controlled with either a Carrier-approved space Dehumidification System) temperature sensor, a Carrier accessory Thermidistat device, or a Unit can be controlled with either a Carrier-approved accessory Carrier-approved accessory thermostat. Install the temperature thermostat or a Carrier-approved space temperature sensor.
- Page 14 C07045 Fig. 14 - - Humidi- -MiZert Low- -Voltage Terminal Strip - - Humidity Sensor/Humidistat Wiring C07191 Fig. 15 - - Third Party Smoke Detector on Humidi- -MiZer Route thermostat or space temperature sensor cable or equivalent Set heat anticipator settings as follows: single leads of colored wire from subbase terminals through conduit into unit to low-voltage connections as shown on unit label STAGE 1...
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Page 15: Step 7 - Install Outdoor Air Hoods
Units with the Humidi- -MiZert option receive a discrete input ECONOMIZER from a field- -installed device (such as from the Carrier humidistat HOODS or Thermidistat device). The discrete input is connected to the TB1 terminal strip points labeled Humidistat 1 and 2. As this is a... -
Page 16: Step 8 - Install All Accessories
C06263 Fig. 19 - - Economizer Flange Catalog No:50PG ---38SI Copyright 2007 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 10/07 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.