Table of Contents
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CONTENTS
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . 1
ACOUSTICAL CONSIDERATIONS . . . . . . . . . . . . . . . . 2
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Acoustic Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-35
Step 1 - Provide Unit Support . . . . . . . . . . . . . . . . . . . 3
Step 2 - Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 3
• POSITIONING
Step 3 - Field Fabricate Ductwork. . . . . . . . . . . . . . . 3
Step 4 - Make Unit Duct Connections . . . . . . . . . . . 3
• 50A2,A3,A6, AND A7 UNITS
• 50A4, A5, A8, AND A9 UNITS
Step 5 - Trap Condensate Drain. . . . . . . . . . . . . . . . 21
Step 6 - Make Electrical Connections . . . . . . . . . . 21
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Relief Damper Hood . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Step 9 - Route Static Pressure Sensors . . . . . . . . 28
Step 10 - Install All Accessories/Options . . . . . . 30
Step 11 - Perform Field Modifications. . . . . . . . . . 32
BACnet Communication Option Wiring . . . . . . . . . 32
• MS/TP WIRING RECOMMENDATIONS
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical compo-
nents. Only trained and qualified service personnel should in-
stall, 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 per-
sonnel. 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.
Catalog No. 04-53500233-01
Single Package Electric Cooling Rooftop Units
with Electric Heat Option, ComfortLink Controls
Installation Instructions
Page
Printed in U.S.A.
®
and Puron
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations. Have
fire extinguishers available for all brazing operations.
Before performing service or maintenance operations on
unit, turn off main power switch to unit. Electrical shock
could cause personal injury.
Puron refrigerant (R-410A) systems operate at higher pres-
sures than standard R-22 systems. Do not use R-22 service
equipment or components on Puron refrigerant equipment.
If service equipment is not rated for Puron refrigerant,
equipment damage or personal injury may result.
1. Improper installation, adjustment, alteration, service,
or maintenance can cause property damage, personal
injury, or loss of life. Refer to the User's Information
Manual provided with this unit for more details.
2. Do not store or use gasoline or other flammable va-
pors and liquids in the vicinity of this or any other
appliance.
DO NOT USE TORCH to remove any component. System
contains oil and refrigerant under pressure.
To remove a component, wear protective gloves and gog-
gles and proceed as follows:
a. Shut off electrical power to unit.
b. Recover refrigerant to relieve all pressure from system
using both high-pressure and low pressure ports.
c. Traces of vapor should be displaced with nitrogen and
the work area should be well ventilated. Refrigerant in
contact with an open flame produces toxic gases.
d. Cut component connection tubing with tubing cutter
and remove component from unit. Use a pan to catch
any oil that may come out of the lines and as a gage
for how much oil to add to the system.
e. Carefully unsweat remaining tubing stubs when nec-
essary. Oil can ignite when exposed to torch flame.
Failure to follow these procedures may result in personal
injury or death.
Form 50A-17SI
Pg 1
WeatherMaker
50A020-060
Refrigerant (R-410A)
WARNING
CAUTION
WARNING
WARNING
3-19
Replaces: 50A-16SI
®
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Table of Contents
Related Manuals for Carrier WeatherMaker 50A020-060
Summary of Contents for Carrier WeatherMaker 50A020-060
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Page 1: Table Of Contents
WeatherMaker ® 50A020-060 Single Package Electric Cooling Rooftop Units with Electric Heat Option, ComfortLink Controls ® and Puron Refrigerant (R-410A) Installation Instructions Follow all safety codes. Wear safety glasses and work CONTENTS gloves. Use quenching cloth for unbrazing operations. Have Page fire extinguishers available for all brazing operations. -
Page 2: Acoustical Considerations
• Supply and return air main trunk ducts should be located over hallways and/or public areas. CAUTION • Provide trailing edge turning vanes in ductwork elbows and tees to reduce air turbulence. DO NOT re-use compressor oil or any oil that has been •... -
Page 3: Installation
Secure all INSTALLATION Step 3 — Field Fabricate Ductwork — ducts to building structure. Use flexible duct connectors be- Step 1 — Provide Unit Support tween unit and ducts as required. Insulate and weatherproof all external ductwork, joints, and roof openings with counter CAUTION flashing and mastic in accordance with applicable codes. - Page 9 a50-8837...
- Page 11 a50-8838...
- Page 16 a50-8839...
- Page 17 Table 1 — Physical Data — 50A Units UNIT 50A NOMINAL CAPACITY (tons) BASE UNIT See Unit Weights Table OPERATING WEIGHT (lb) COMPRESSOR Quantity ... Type (Ckt 1/Ckt 2) 2 ... ZP67/1…ZP91 2 ... ZP91/1…ZP91 2 ... ZP91/1…ZP91 2…ZP72, 2…ZP72 Number of Refrigerant Circuits Precharged Precharged...
- Page 18 Table 1 — Physical Data — 50A Units (cont) UNIT 50A NOMINAL CAPACITY (tons) BASE UNIT See Unit Weights Table OPERATING WEIGHT (lb) COMPRESSOR Quantity ... Type (Ckt 1/Ckt 2) 2 ... ZP67/2…ZP104 2…ZP104/2…ZP104 2…ZP122/2…ZP122 2…ZP154/2…ZP154 Number of Refrigerant Circuits Precharged Precharged Precharged...
- Page 19 Table 2 — 50A Base Unit Operating Weights (lb) UNIT SIZE 50A2,A3,A6,A7 3625 3761 3761 3792 4025 4455 4599 6826 50A4,A5,A8,A9 3703 3839 3839 3870 4218 4648 4792 7041 Table 3 — 50A Option and Accessory Weights (lb) UNIT SIZE Barometric Relief Non-Modulating Power Exhaust Modulating Power Exhaust...
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Page 21: Step 5 - Trap Condensate Drain
Table 6 — Evaporator Fan Motor Data MOTOR UNIT MOTOR MOTOR SHEAVE BUSHING SHEAVE BUSHING BELT BELT MOTOR SHAFT SIZE SHAFT DIA. SHEAVE PITCH DIAMETER SHEAVE PITCH DIAMETER (QUANTITY) TENSION SPEED (in.) (P/N) DIAMETER (in.) (P/N) DIAMETER (in.) (P/N) (lb at .25 in.) (RPM) (in.) (in.) - Page 22 Routing Through Side of Unit — Route power wiring in field-supplied watertight conduit into unit through 2 -in. (siz- es 020-035) or 3-in. (sizes 040-060 units) hole. Use field-supplied strain relief going into control box through 3 -in. diameter hole provided. After wires are in unit control box, connect to power terminal block (see Power Wir- ing section on page 21).
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Page 23: Field Control Wiring
ComfortLink controls can also be used with T55 and (CV and VAV) T56 space temperature sensors that use a 10K thermistor. The T56 • Network application with CCN (Carrier Comfort Net- sensor also has the capability for a configurable temperature set work ®... - Page 24 4 or 9 as shown in Fig. 23. system element, the shields of the communication bus cables T58 Communicating Thermostat — Carrier also has a fully must be tied together. If the communication bus is entirely...
- Page 25 Remote IAQ Override — If the control is being used with for remote occupancy signals. This wiring can be connected to non-Carrier building management system, it supports the use terminal TB6 terminal 1 and 3. of the remote IAQ override switch. This should be connected Smoke Sensor Interface —...
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Page 26: Step 7 - Make Outdoor-Air Inlet
Step 7 — Make Outdoor-Air Inlet Adjustments ECONOMIZER MIXED OUTDOOR DAMPER — Hoods are used on all units with economizer or HOOD SIDE adjustable self-closing mixed outdoor air damper. NOTE: If accessory power exhaust or barometric relief pack- FLANGE ages are being added to the unit, install power exhaust or baro- metric relief before installing economizer hoods. - Page 27 TOP HOOD FILTER FLANGE ASSEMBLY POINTING DOWN MOUNTING ANGLE FASTENED TO BOTTOM OF FILTER ASSEMBLY CROSSMEMBER SIDE Fig. 32 — Correctly Assembled Bottom Filter SEAL STRIP HOOD Assembly, Sizes 020-035 Only Fig. 28 — Adding Seal Strip to Hood Top and Side Hoods FILTER FLANGE...
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Page 28: Step 8 - Position Power Exhaust/Barometric
unit is installed. On 50A4,A5,A8,A9 units (designed for horizontal supply and return), the assemblies will have to be relocated to return ductwork. See Fig. 39 for dimensions and details. All electrical connections have been made and adjusted at the factory. The power exhaust blowers and barometric relief dampers are shipped assembled and tilted back into the unit for shipping. - Page 29 ECONOMIZER HOOD 42.56” LOCA TIO N BAROMETRIC RELIEF OR POWER EXHAUST “SIDE #2” ECONOMIZER HOOD 23.28” TY P “END #2” 42” MIN. 12.94 R/ A (UNI T OPENING) a50-8110 “SIDE #1” “END #1” J BO X 23.28” 42.62” PLENUM RA TED CABLE 42.62 (FIELD SUPPLIED )
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Page 30: Step 10 - Install All Accessories/Options
® V low ambient head pressure control FIELD-FABRICATED WIND BAFFLES IMPORTANT: Carrier recommends the installation of field-fabricated wind baffles on all vertically oriented condenser coils when operating in environments with prevailing winds of more than 5 mph and where tem-... - Page 31 SIZES 020-035 SIZES 036-050 AND 060 RTPF DIMENSION “A” UNIT SIZE QUANTITY 020-035 78.125 ± 0.125 1984 ± 3 036-050 78.125 ± 0.125 1984 ± 3 118 ± 0.125 2997 ± 3 NOTE: 50A060 units with MCHX do not require baffles. LEGEND MCHX —...
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Page 32: Step 11 - Perform Field Modifications
Step 11 — Perform Field Modifications BACnet Communication Option Wiring DUCTWORK WIRING THE UPC OPEN CONTROLLER TO THE MS/ TP NETWORK — The UPC Open controller communicates Bottom Return Units (50A2,A3,A6,A7) Field-Modified for using BACnet on an MS/TP network segment communications Side Return —... - Page 33 97.78” (020-050), 150.47” (051 AND 060) INSIDE DIMENSION 31.25” INSIDE a48-8245 Fig. 43 — Side Return Duct Dimensions Table 9 — Open System Wiring Specifications and Recommended Vendors WIRING SPECIFICATIONS RECOMMENDED VENDORS AND PART NUMBERS WIRE CONNECT AIR CONTRACTORS DESCRIPTION BELDEN RMCORP TYPE INTERNATIONAL...
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Page 34: Ms/Tp Wiring Recommendations
Table 10 — MS/TP Wiring Recommendations SPECIFICATION RECOMMMENDATION CABLE Single twisted pair, low capacitance, CL2P, 22 AWG (7x30), TC foam FEP, plenum rated cable CONDUCTOR 22 or 24 AWG stranded copper (tin plated) INSULATION Foamed FEP 0.015 in. (0.381 mm) wall 0.060 in. (1.524 mm) O.D. COLOR CODE Black/White TWIST LAY... -
Page 35: Installation
Fig. 45 — Open System Network Wiring BACnet ® BT 485 SHIELD PORT S1 BACnet MS/TP NET- NET+ EIA-485 485-2WIRE Fig. 46 — BT485 Terminator Installation... -
Page 36: Manufacturer Reserves The Right To Discontinue, Or Change At Any Time, Specifications Or Designs Without Notice And Without Incurring Obligations
© Carrier Corporation 2019 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500233-01 Printed in U.S.A. Form 50A-17SI Pg 36 3-19 Replaces: 50A-16SI...