Download
Share
Print this page
  1. Manuals
  2. Brands
  3. United Technologies Manuals
  4. Air Conditioner
  5. Carrier WeatherMaker 50A2 020
  6. Installation instructions manual

United Technologies Carrier WeatherMaker 50A2 020 Installation Instructions Manual

Single package electric cooling rooftop units with electric heat option, comfortlink controls and puron refrigerant r-410a
Hide thumbs

Advertisement

Quick Links

Download this manual
CONTENTS
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . 1
ACOUSTICAL CONSIDERATIONS . . . . . . . . . . . . . . . . 2
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Acoustic Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-53
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
Step 5 - Trap Condensate Drain. . . . . . . . . . . . . . . . 21
• POWER WIRING
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Relief Damper Hood . . . . . . . . . . . . . . . . . . . . . . . . . . 46
• 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.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500207-01
Single Package Electric Cooling Rooftop Units
with Electric Heat Option, ComfortLink Controls
Installation Instructions
Page
Printed in U.S.A.
50A2,A3,A4,A5020-060
®
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-16SI
Pg 1
WeatherMaker
Refrigerant (R-410A)
WARNING
CAUTION
WARNING
WARNING
10-18
Replaces: 50A-15SI
®

Advertisement

loading
Need help?

Need help?

Do you have a question about the Carrier WeatherMaker 50A2 020 and is the answer not in the manual?

Questions and answers

Related Manuals for United Technologies Carrier WeatherMaker 50A2 020

Summary of Contents for United Technologies Carrier WeatherMaker 50A2 020

  • Page 1: Table Of Contents

    WeatherMaker ® 50A2,A3,A4,A5020-060 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

    ROOF MOUNT — Check building codes for weight distribu- INSTALLATION tion requirements. See Fig. 15. Unit operating weight is shown Step 1 — Provide Unit Support in Tables 2-5. Secure all Step 3 — Field Fabricate Ductwork — CAUTION ducts to building structure. Use flexible duct connectors be- tween unit and ducts as required.
  • Page 9 a50-8837...
  • Page 11 a50-8838...
  • Page 16 a50-8839...
  • Page 17 Table 1 — Physical Data — 50A2,A3,A4,A5 Units UNIT 50A2,A3,A4,A5 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 — 50A2,A3,A4,A5 Units (cont) UNIT 50A2,A3,A4,A5 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 — 50A2,A3,A4,A5 Base Unit Operating Weights (lb) UNIT SIZE 50A2,A3 3625 3761 3761 3792 4025 4455 4599 6826 50A4,A5 3703 3839 3839 3870 4218 4648 4792 7041 Table 3 — 50A2,A3,A4,A5 Option and Accessory Weights (lb) UNIT SIZE Barometric Relief Non-Modulating Power Exhaust Modulating Power Exhaust...

  • Page 21: Step 5 - Trap Condensate Drain

    Table 6 — Evaporator Fan Motor Data MOTOR UNIT MOTOR MOTOR SHEAVE BUSHING SHEAVE BUSHING BELT BELT SIZE MOTOR SHAFT SHAFT DIA. SHEAVE PITCH DIAMETER SHEAVE PITCH DIAMETER (QUANTITY) TENSION 50A2,A3, SPEED (in.) (P/N) DIAMETER (in.) (P/N) DIAMETER (in.) (P/N) (lb at .25 in.) A4,A5 (RPM)
  • Page 22 Unit may be equipped with optional factory-installed non- fused disconnect switch (see Fig. 19). Provide maximum over- current protection devices (fuses or UL489 rated breakers, per FIELD local codes) in branch circuit wiring remote from unit. Observe requirements of NEC Article 440. Install service switch up- POWER stream of remote fuses if required.
  • Page 23 • Building and duct static pressure control IMPORTANT: On 208/230-v units, transformers 1 to 5 • Fire shutdown and smoke control are wired for 230-v. If 208/230-v unit is to be run with • Diagnostics and monitoring 208-v power supply, the transformers must be rewired •...
  • Page 24 Table 7 — Electrical Data — 50A2,A3,A4,A5 Units without Convenience Outlet COMPRESSOR VOLTAGE CONDENSER EVAPORATOR POWER OPTIONAL POWER SUPPLY UNIT VOLTAGE RANGE FAN MOTOR FAN MOTOR EXHAUST ELECTRIC HEAT Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No.
  • Page 25 Table 7 — Electrical Data — 50A2,A3,A4,A5 Units without Convenience Outlet (cont) COMPRESSOR VOLTAGE CONDENSER EVAPORATOR POWER OPTIONAL POWER SUPPLY UNIT VOLTAGE RANGE FAN MOTOR FAN MOTOR EXHAUST ELECTRIC HEAT Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No.
  • Page 26 Table 7 — Electrical Data — 50A2,A3,A4,A5 Units without Convenience Outlet (cont) COMPRESSOR VOLTAGE CONDENSER EVAPORATOR POWER OPTIONAL POWER SUPPLY UNIT VOLTAGE RANGE FAN MOTOR FAN MOTOR EXHAUST ELECTRIC HEAT Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No.
  • Page 27 Table 7 — Electrical Data — 50A2,A3,A4,A5 Units without Convenience Outlet (cont COMPRESSOR VOLTAGE CONDENSER EVAPORATOR POWER OPTIONAL POWER SUPPLY UNIT VOLTAGE RANGE FAN MOTOR FAN MOTOR EXHAUST ELECTRIC HEAT Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No.
  • Page 28 Table 7 — Electrical Data — 50A2,A3,A4,A5 Units without Convenience Outlet (cont) COMPRESSOR VOLTAGE CONDENSER EVAPORATOR POWER OPTIONAL POWER SUPPLY UNIT VOLTAGE RANGE FAN MOTOR FAN MOTOR EXHAUST ELECTRIC HEAT Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No.
  • Page 29 Table 7 — Electrical Data — 50A2,A3,A4,A5 Units without Convenience Outlet (cont) COMPRESSOR VOLTAGE CONDENSER EVAPORATOR POWER OPTIONAL POWER SUPPLY UNIT VOLTAGE RANGE FAN MOTOR FAN MOTOR EXHAUST ELECTRIC HEAT Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No.
  • Page 30 Table 7 — Electrical Data — 50A2,A3,A4,A5 Units without Convenience Outlet (cont) COMPRESSOR VOLTAGE CONDENSER EVAPORATOR POWER OPTIONAL POWER SUPPLY UNIT VOLTAGE RANGE FAN MOTOR FAN MOTOR EXHAUST ELECTRIC HEAT Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No.
  • Page 31 Table 7 — Electrical Data — 50A2,A3,A4,A5 Units without Optional Convenience Outlet (cont) COMPRESSOR VOLTAGE CONDENSER EVAPORATOR POWER OPTIONAL POWER SUPPLY UNIT VOLTAGE RANGE FAN MOTOR FAN MOTOR EXHAUST ELECTRIC HEAT Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No.
  • Page 32 Table 7 — Electrical Data — 50A2,A3,A4,A5 Units without Optional Convenience Outlet (cont) COMPRESSOR VOLTAGE CONDENSER EVAPORATOR POWER OPTIONAL POWER SUPPLY UNIT VOLTAGE RANGE FAN MOTOR FAN MOTOR EXHAUST ELECTRIC HEAT Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No.
  • Page 33 Table 8 — Electrical Data — 50A2,A3,A4,A5 Units with Convenience Outlet COMPRESSOR VOLTAGE CONDENSER EVAPORATOR POWER CONVENIENCE OPTIONAL POWER UNIT VOLTAGE CIR A, NO. CIR A, NO. CIR B, NO. CIR B, NO. RANGE FAN MOTOR FAN MOTOR EXHAUST OUTLET ELECTRIC HEAT SUPPLY SIZE...
  • Page 34 Table 8 — Electrical Data — 50A2,A3,A4,A5 Units with Convenience Outlet (cont) COMPRESSOR VOLTAGE CONDENSER EVAPORATOR POWER CONVENIENCE OPTIONAL POWER UNIT VOLTAGE CIR A, NO. CIR A, NO. CIR B, NO. CIR B, NO. RANGE FAN MOTOR FAN MOTOR EXHAUST OUTLET ELECTRIC HEAT SUPPLY...
  • Page 35 Table 8 — Electrical Data — 50A2,A3,A4,A5 Units with Convenience Outlet (cont) COMPRESSOR OPTIONAL VOLTAGE CONDENSER EVAPORATOR POWER CONVENIENCE ELECTRIC POWER SUPPLY UNIT VOLTAGE CIR A, NO. CIR A, NO. CIR B, NO. CIR B, NO. RANGE FAN MOTOR FAN MOTOR EXHAUST OUTLET HEAT...
  • Page 36 Table 8 — Electrical Data — 50A2,A3,A4,A5 Units with Convenience Outlet (cont) COMPRESSOR OPTIONAL VOLTAGE CONDENSER EVAPORATOR POWER CONVENIENCE ELECTRIC POWER SUPPLY UNIT VOLTAGE CIR A, NO. CIR A, NO. CIR B, NO. CIR B, NO. RANGE FAN MOTOR FAN MOTOR EXHAUST OUTLET HEAT...
  • Page 37 Table 8 — Electrical Data — 50A2,A3,A4,A5 Units with Convenience Outlet (cont) COMPRESSOR VOLTAGE CONDENSER EVAPORATOR POWER CONVENIENCE OPTIONAL POWER SUPPLY UNIT RANGE FAN MOTOR FAN MOTOR EXHAUST OUTLET ELECTRIC HEAT VOLTAGE Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No. 2 SIZE 3 PH, 60 Hz Min Max RLA LRA RLA LRA RLA LRA RLA LRA...
  • Page 38 Table 8 — Electrical Data — 50A2,A3,A4,A5 Units with Convenience Outlet (cont) COMPRESSOR VOLTAGE CONDENSER EVAPORATOR POWER CONVENIENCE OPTIONAL POWER SUPPLY UNIT RANGE FAN MOTOR FAN MOTOR EXHAUST OUTLET ELECTRIC HEAT VOLTAGE Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No. 2 SIZE 3 PH, 60 Hz Min Max RLA LRA RLA LRA RLA LRA RLA LRA...
  • Page 39 Table 8 — Electrical Data — 50A2,A3,A4,A5 Units with Convenience Outlet (cont) COMPRESSOR OPTIONAL VOLTAGE CONDENSER EVAPORATOR POWER CONVENIENCE ELECTRIC POWER SUPPLY UNIT VOLTAGE CIR A, NO. CIR A, NO. CIR B, NO. CIR B, NO. RANGE FAN MOTOR FAN MOTOR EXHAUST OUTLET HEAT...
  • Page 40 Table 8 — Electrical Data — 50A2,A3,A4,A5 Units with Convenience Outlet (cont) COMPRESSOR VOLTAGE CONDENSER EVAPORATOR POWER CONVENIENCE OPTIONAL POWER UNIT VOLTAGE CIR A, NO. CIR A, NO. CIR B, NO. CIR B, NO. RANGE FAN MOTOR FAN MOTOR EXHAUST OUTLET ELECTRIC HEAT SUPPLY...
  • Page 41 Table 8 — Electrical Data — 50A2,A3,A4,A5 Units with Convenience Outlet (cont) COMPRESSOR VOLTAGE CONDENSER EVAPORATOR POWER CONVENIENCE OPTIONAL POWER UNIT VOLTAGE CIR A, NO. CIR A, NO. CIR B, NO. CIR B, NO. RANGE FAN MOTOR FAN MOTOR EXHAUST OUTLET ELECTRIC HEAT SUPPLY...
  • Page 42 T-STAT (Conventional Thermostat) — Unit can be con- Conductors and drain wire must be 20 AWG minimum trolled with a Carrier-approved accessory electro-mechanical stranded, tinned copper. Individual conductors must be or electronic thermostat that has two stages of cooling, two insulated with PVC, PVC/nylon, vinyl, Teflon , or polyeth- stages of heating control, and an output for indoor fan control.
  • Page 43 SENSOR 4 SENSOR 1 SENSOR 3 SENSOR 2 SPACE TEMPERATURE AVERAGING (4 SENSOR APPLICATION) SENSOR 1 SENSOR 2 SENSOR 3 SENSOR 6 SENSOR 4 SENSOR 5 SENSOR 9 SENSOR 8 SENSOR 7 SPACE TEMPERATURE AVERAGING (9 SENSOR APPLICATION) a48-6855 NOTE: Use T55 sensor only. Fig.

  • Page 44: 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 45 TOP HOOD FILTER FLANGE ASSEMBLY POINTING DOWN MOUNTING ANGLE FASTENED TO BOTTOM OF FILTER ASSEMBLY CROSSMEMBER SIDE Fig. 31 — Correctly Assembled Bottom Filter SEAL STRIP HOOD Assembly, Sizes 020-035 Only Fig. 27 — Adding Seal Strip to Hood Top and Side Hoods FILTER FLANGE...

  • Page 46: Step 8 - Position Power Exhaust/Barometric

    is installed. On 50A4 and A5 units (designed for horizontal supply and return), the assemblies will have to be relocated to return ductwork. See Fig. 38 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 47 ECONOMIZER HOOD 42.56” LOCATION BAROMETRIC RELIEF OR POWER EXHAUST “SIDE #2” ECONOMIZER HOOD 23.28” “END #2” 42” MIN. 12.94 (UNIT OPENING) a50-8110 “SIDE #1” “END #1” J BOX 23.28” 42.62” PLENUM RATED CABLE 42.62 (FIELD SUPPLIED) ALTERNATE LOCATION J BOX (END) NOTE: Sizes 020-050 shown (2 power exhaust fans).

  • Page 48: Pressure Transducers

    • Return air humidity sensors (used for economizer differen- tial enthalpy changeover, factory-installed with Humidi- a48-6983 MiZer option) • Return air smoke detector • Controls expansion module (used for interface to build- ing management systems, not typically needed on system with Carrier Comfort Network ®...
  • Page 49 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: 50A2,A3,A4,A5060 units with MCHX do not require baffles. LEGEND MCHX —...

  • Page 50: Wiring The Upc Open Controller To The Ms/Tp Network

    Step 11 — Perform Field Modifications BACnet Communication Option Wiring DUCTWORK WIRING THE UPC OPEN CONTROLLER TO THE MS/TP NETWORK — The UPC Open controller communi- Bottom Return Units (50A2 and A3) Field-Modified for cates using BACnet on an MS/TP network segment communi- Side Return —...
  • Page 51 97.78” (020-050), 150.47” (051 AND 060) INSIDE DIMENSION 31.25” INSIDE a48-8245 Fig. 42 — Side Return Duct Dimensions Table 11 — Open System Wiring Specifications and Recommended Vendors WIRING SPECIFICATIONS RECOMMENDED VENDORS AND PART NUMBERS WIRE CONNECT AIR CONTRACTORS DESCRIPTION BELDEN RMCORP TYPE INTERNATIONAL...

  • Page 52: Power Led

    Table 12 — 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 53 Fig. 44 — Open System Network Wiring Fig. 45 — BT485 Terminator Installation...
  • Page 56 © Carrier Corporation 2018 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500207-01 Printed in U.S.A. Form 50A-16SI Pg 56 10-18 Replaces: 50A-15SI...

This manual is also suitable for:

Carrier weathermaker 50a2 025Carrier weathermaker 50a2 027Carrier weathermaker 50a2 030Carrier weathermaker 50a2 035Carrier weathermaker 50a2 040Carrier weathermaker 50a2 050 ... Show all