Carrier WeatherMaker 50TC Series Installation Instructions Manual
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Carrier WeatherMaker 50TC Series Installation Instructions Manual

18-29 single package rooftop with cooling only horizontal airflow unit with puron (r-410a) refrigerant
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50TC units for installation in the United States contain use of Carrier's Staged Air Volume
(SAV™) 2-speed indoor fan control system. This complies with the U.S. Department of
Energy (DOE) efficiency standard of 2018.
50TC units for installation outside the United States may or may not contain use of the SAV
2-speed indoor fan control system as they are not required to comply with the U.S.
Department of Energy (DOE) efficiency standard of 2018.
For specific details on operation of the Carrier SAV 2-speed indoor fan system refer to the
Variable Frequency Drive (VFD) Factory-Installed Option 2-Speed Motor Control Installation,
Setup, and Troubleshooting manual.
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Job-Site Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . . 16
Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . 16
Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . . 16
Step 5 - Rig and Place Unit . . . . . . . . . . . . . . . . . . . 21
Step 6 - Field Fabricate Ductwork . . . . . . . . . . . . . 21
Step 7 - Horizontal Duct Connection . . . . . . . . . . . 21
Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500263-01
Installation Instructions
Printed in U.S.A.
Form 50TC-18-29-H-03SI
WeatherMaker
Single Package Rooftop with Cooling Only
with Puron
Humidi-MiZer® Control Connections . . . . . . . . . . . .29
• CO2 SENSOR WIRING
Drive (Factory Option) . . . . . . . . . . . . . . . . . . . . . .44
PremierLink™ Control . . . . . . . . . . . . . . . . . . . . . . . .44
RTU Open Control System. . . . . . . . . . . . . . . . . . . . .44
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Smoke Detectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
• ECONOMI$ER® IV OCCUPANCY SWITCH
Step 12 - Install Accessories . . . . . . . . . . . . . . . . . .57
Step 13 - Check Belt Tension . . . . . . . . . . . . . . . . .57
Pre-Start and Start-Up . . . . . . . . . . . . . . . . . . . . . . . .58
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . .CL-1

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.
Pg 1
®
50TC 18-29
Horizontal Airflow Unit
®
(R-410A) Refrigerant
9-19
Replaces: 50TC-18-29-H-02SI

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  • Page 1: Table Of Contents

    2-speed indoor fan control system as they are not required to comply with the U.S. Department of Energy (DOE) efficiency standard of 2018. For specific details on operation of the Carrier SAV 2-speed indoor fan system refer to the Variable Frequency Drive (VFD) Factory-Installed Option 2-Speed Motor Control Installation, Setup, and Troubleshooting manual.

  • Page 2: General

    Untrained personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters. All other operations WARNING should be performed by trained service personnel. When working PERSONAL INJURY AND ENVIRONMENTAL on air-conditioning equipment, observe precautions in the litera- HAZARD ture, tags and labels attached to the unit, and other safety precau- tions that may apply.
  • Page 3 Position: 9 10 11 12 13 14 15 16 17 18 Example: Unit Heat Type Packaging and Seismic Compliance 50 - Electric Heat Packaged Rooftop 0 = Standard ® Model Series - WeatherMaker Electrical Options TC - Standard Efficiency A = Non USA models – No (SAV) included C = Non-Fused Disconnect G = Standard USA models –...
  • Page 4 Fig. 2 — 50TC**18 Horizontal Airflow...
  • Page 5 Fig. 3 — 50TC**18 Back View and Condensate Drain Location...
  • Page 6 Fig. 4 — 50TC**18 Corner Weights and Clearances...
  • Page 7 Fig. 5 — 50TC**18 Bottom View...
  • Page 8 Fig. 6 — 50TC**21-25 Horizontal Airflow...
  • Page 9 Fig. 7 — 50TC**21-25 Back View and Condensate Drain Location...
  • Page 10 Fig. 8 — 50TC**21-25 Corner Weights and Clearances...
  • Page 11 Fig. 9 — 50T**21-25 Bottom View...
  • Page 12 Fig. 10 — 50TC**29 Horizontal Airflow...
  • Page 13 Fig. 11 — 50TC**29 Back View and Condensate Drain Location...
  • Page 14 Fig. 12 — 50TC**29 Corner Weights and Clearances...
  • Page 15 Fig. 13 — 50TC**29 Bottom View...

  • Page 16: Installation

    Rig and place unit INSTALLATION Remove duct covers and top skid Job-Site Survey Install smoke detector return air sensor tube Complete the following checks before installation. Install field-fabricated ductwork at unit duct openings Consult local building codes and the NEC (National Elec- trical Code) ANSI/NFPA 70 for special installation Install outdoor air hood requirements.

  • Page 17: Alternate Unit Support (In Lieu Of Curb Mount)

    If electric and control wiring is to be routed through the basepan, remove knockouts in basepan located in control box area of access panel, see Fig. 14. See Fig. 16-18 for basepan knockout locations for location. Attach the service connections to the basepan. ALTERNATE UNIT SUPPORT (IN LIEU OF CURB MOUNT) A non-combustible sleeper rail can be used in the unit curb sup-...
  • Page 18 Fig. 16 — 50TC**18 Roof Curb Details...
  • Page 19 Fig. 17 — 50TC**21-25 Roof Curb Details...
  • Page 20 Fig. 18 — 50TC**29 Roof Curb Details...

  • Page 21: Step 5 - Rig And Place Unit

    DETAIL A (914-1371) 36"-54" DUCT END "B" SEE DETAIL A "C" "A" DIMENSIONS MAX WEIGHT UNIT 50TC-*18 2212 1003 127.8 3249 58.7 1491 52.3 1328 50TC-*21 2422 1099 141.5 3595 71.5 1816 52.3 1328 50TC-*25 2572 1167 141.5 3595 71.5 1816 60.3 1532...

  • Page 22: Step 8 - Install Outside Air Hood

    HOOD PACKAGE Horizontal Supply Air Fig. 22 — Hood Package — Shipping Location Return Air Duct Return Air Duct without with Economizer TO REMOVE THE HOOD PARTS PACKAGE: Economizer Fig. 20 — Horizontal Duct Opening Dimensions Remove the back blower access panel. Locate and cut the strap, being careful to not damage any Field-supplied ( -in.) flanges should be attached to horizontal...

  • Page 23: Step 9 - Install External Condensate Trap And Line

    Step 9 — Install External Condensate Trap and APPLY SEAL STRIP Line TO THE BACK OF THIS FLANGE APPLY SEAL STRIP The unit has one -in. condensate drain connection on the end of TO THE BACK APPLY SEAL STRIP the condensate pan (see Fig. 26). See Fig. 3, 7, and 11 for the lo- OF THIS FLANGE TO THE BACK cation of the condensate drain connection.

  • Page 24: Field Power Supply

    NOTE: Field-supplied wiring shall conform with the limitations of minimum 63°F (33°C) rise. FIELD POWER SUPPLY If equipped with optional powered convenience outlet: the power ELECTRIC source leads to the convenience outlet’s transformer primary are DISCONNECT not factory connected. Installer must connect these leads accord- SWITCH ing to required operation of the convenience outlet.

  • Page 25: All Units

    Units Without Disconnect Option Equip GR Lug Disconnect per NEC Ground (GR) 208/230-3-60 460-3-60 575-3-60 Units With Disconnect Option Factory Equip Wiring GR Lug Fig. 30 — Handle and Shaft Assembly for NFD ALL UNITS All field wiring must comply with NEC and all local code Optional requirements.

  • Page 26: Convenience Outlets

    WEATHERPROOF Operation on improper line voltage or excessive phase imbal- ance constitutes abuse and may cause damage to electrical components. Such operation would invalidate any applicable Carrier warranty. CONVENIENCE OUTLETS WARNING ELECTRICAL OPERATION HAZARD Failure to follow this warning could result in personal injury or death.

  • Page 27: Factory-Option Thru-Base Connections

    This device can be a thermostat (field-supplied) or a Premier- Link™ controller (available as factory-installed option or as field- installed accessory, for use on a Carrier Comfort Network or as a stand alone control) or the RTU Open for Building Management Systems using non-CCN protocols (RTU Open is available as a factory-installed option only).

  • Page 28: Heat Anticipator Settings

    Configure for Electric Heat To configure the factory-approved thermostat, open the Advanced Setup menu, scroll down to ELECTRIC HEAT and change RUBBER RANGE value from OFF to ON. Consult the thermostat installa- GROMMET tion instructions for full details. CENTRAL TERMINAL TYPICAL CORNER BOARD...

  • Page 29: Low-Voltage Control Connections

    (see Fig. 45). The dry contacts must be wired between CTB terminal R and the PINK lead to the LTLO switch with field-supplied wire nuts. Refer to the installation instructions included with the Carrier Edge Ther- midistat device for more information.
  • Page 30 % RELATIVE HUMIDITY Fig. 42 — Accessory Field-Installed Humidistat ® Fig. 43 — Edge Pro ® Thermidistat ® Fig. 44 — Typical Humidi-MiZer Adaptive Dehumidification System Humidistat Wiring...

  • Page 31: Economi$Er® X (Factory-Installed Option)

    EDGE Pro THERMIDISTAT Unit CTB THERMOSTAT O/W2/B SRTN ® Humidi-MiZer FIOP *Connection not required. Fig. 45 — Typical Rooftop Unit with Humidi-MiZer Adaptive Dehumidification System ® with Edge Pro Thermidistat Device SYSTEM COMPONENTS ® EconoMi$er X (Factory-Installed Option) The EconoMi$er X system includes an economizer module, 20k PRODUCT DESCRIPTION mixed air sensor, damper actuator, and either a 20k outdoor air The EconoMi$er X system is an expandable economizer control...

  • Page 32: Outputs

    Relay Digital Output Rating at 30 Vac (maximum power from ECONOMIZER MODULE WIRING DETAILS Class 2 input only) — 1.5A run: Use Fig. 47 and Tables 3 and 4 to locate the wiring terminals for 3.5A inrush at 0.45PF (200,000 cycles) or the Economizer module.

  • Page 33: S-Bus Sensor Wiring

    Table 4 — Economizer Module - Right Hand Terminal Table 5 — HH57AC081 Sensor Wiring Terminations Blocks TERMINAL TYPE DESCRIPTION LABEL TYPE DESCRIPTION NUMBER LABEL S-BUS Top Right Terminal Blocks Communications S-BUS S-BUS AUX2 I 24 vac IN The first terminal is not used. (Enthalpy Control Sensor Bus) Shut Down (SD) or HEAT (W)

  • Page 34: Menu Structure

    To use the keypad when working with menus: 10. Press the (Menu Up/Exit) button to return to the previous menu. • Press the ▲ (Up arrow) button to move to the previous menu. MENU STRUCTURE • Press the ▼ (Down arrow) button to move to the next Table 7 illustrates the complete hierarchy of menus and parame- menu.
  • Page 35 Table 7 — Menu Structure PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT FIRST STAGE COOLING DEMAND (Y1–IN) ECONO AVAIL YES/NO YES = economizing available; the system can use outside air for free cooling when required FIRST STAGE COOLING RELAY OUTPUT ECONOMIZING YES/NO YES = outside air being used for 1 stage cooling...
  • Page 36 Table 7 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT MECH COOL ON Displays stage of mechanical cooling that is active. 0, 1, or 2 HEAT STAGES ON Displays the stage of heat pump heating that is active. STATUS (cont) SUPPLY FAN SPEED FAN SPEED...
  • Page 37 Table 7 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT In CONV mode: SD + Enables configuration of shutdown (default); W = Informs controller that system is in heating mode. NOTE: If using 2-speed fan mode, you must program CONV SD/W or HP(O)/ AUX2 IN mode for W.
  • Page 38 Table 7 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT RETURN AIR HUMIDITY CALIBRATION RA H CAL 0% RH ±10% RH Allows for operator to adjust for an out of calibration humidity sensor. DISCHARGE AIR TEMPERATURE CALIBRATION ADVANCED DA T CAL 0.0°F...
  • Page 39 Table 7 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT ACTUATOR VOLTAGE HIGH ACT OVER V Voltage received by actuator is below expected range. ALARMS (cont) ACTUATOR STALLED ACT STALLED Actuator stopped before achieving commanded position. LEGEND the Heating mode, the ERV terminal will be energized when the OA is below the ERV OAT setpoint in the setpoint menu.
  • Page 40 Table 10 — Dry Bulb Operation with DCV (CO Sensor) — 1 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I Y1-O Y2-O OCCUPIED UNOCCUPIED SPEED VENTILATION (DCV) ECONOMIZE HIGH 0v/Off 0v/Off VENTMIN Closed HIGH 24v/On 0v/Off VENTMIN Closed HIGH 24v/On 24v/On...
  • Page 41 Table 13 — Dry Bulb Operation without DCV (CO Sensor) — 2 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I Y1-O Y2-O OCCUPIED UNOCCUPIED SPEED VENTILATION (DCV) ECONOMIZE 0v/Off 0v/Off MIN POS Closed 24v/On 0v/Off MIN POS Closed HIGH 24v/On 24v/On...

  • Page 42: Enthalpy Settings

    Table 16 — Enthalpy Operation with DCV (CO Sensor) — 2 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I Y1-O Y2-O OCCUPIED UNOCCUPIED SPEED VENTILATION (DCV) ECONOMIZE 0v/Off 0v/Off VENTMIN Closed 24v/On 0v/Off VENTMIN Closed HIGH 24v/On 24v/On VENTMIN Closed 0v/Off...

  • Page 43: Two-Speed Fan Operation

    Figure 51 shows the 5 current boundaries. There is also a high lim- Initial Menu Display it boundary for differential enthalpy. The high limit boundary is On initial start up, Honeywell displays on the first line and Econo- ES1 when there are no stages of mechanical cooling energized and mizer W7220 on the second line.

  • Page 44: Staged Air Volume (Sav™) With Variable Frequency Drive (Factory Option)

    PremierLink™ Control For details on operating units equipped with the factory-installed CAUTION PremierLink controller option, refer to the PremierLink Retrofit EQUIPMENT DAMAGE HAZARD Rooftop Controller Version 3.x Installation, Start-Up, and Config- Failure to follow this caution may result in equipment damage. uration Instructions manual.
  • Page 45 Fig. 52 — PremierLink™ Controller Wiring Diagram...
  • Page 46 Fig. 53 — PremierLink™ Controller Wiring Diagram with Humidi-MiZer ® System...
  • Page 47 Fig. 54 — Typical RTU Open System Control Wiring Diagram...
  • Page 48 Fig. 55 — Typical RTU Open System Control Wiring Diagram with Humidi-MiZer ® System...
  • Page 49 Fig. 56 — 50TC**18-29 Control Wiring Diagram (208/230, 460, 575-3-60)
  • Page 50 Fig. 57 — 50TC**18-29 Power Wiring Diagram (208/230-3-60)
  • Page 51 Fig. 58 — 50TC**18-29 Power Wiring Diagram (460, 575-3-60)
  • Page 52 Fig. 59 — 50TC**18-29 Control Wiring Diagram with Humidi-MiZer System (208/230, 460, 575-3-60)
  • Page 53 Fig. 60 — 50TC**18-29 Power Wiring Diagram with Humidi-MiZer System (208/230-3-60)
  • Page 54 Fig. 61 — 50TC**18-29 Power Wiring Diagram with Humidi-MiZer System (460-3-60)
  • Page 55 Fig. 62 — 50TC**18-29 Power Wiring Diagram with Humidi-MiZer System (575-3-60)

  • Page 56: Smoke Detectors

    Smoke Detectors Smoke detectors are available as factory-installed options on 50TC models. Smoke detectors may be specified for supply air only, for return air without or with economizer, or in combina- tion of supply air and return air. The unit is factory-configured for immediate smoke detector shutdown operation;...

  • Page 57: Step 11 - Adjust Factory-Installed Options

    UNIT WITHOUT ECONOMIZER OR ECONOMIZER 2 POSITION DAMPER 2 POSITION DAMPER Fig. 66 — EconoMi$er ® IV Wiring • DDC interface (PremierLink) Step 11 — Adjust Factory-Installed Options • Louvered hail guard ECONOMI$ER ® IV OCCUPANCY SWITCH • Phase monitor control Refer to Fig.

  • Page 58: Pre-Start And Start-Up

    TENSION FORCE IN BELT (LBS) Used Table 2 Fig. 67 — V-Belt Force Label © 2019 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500263-01 Printed in U.S.A.
  • Page 59 START-UP CHECKLIST — 50TC 18-29 SINGLE PACKAGE ROOFTOP WITH ® HEAT/ELECTRIC COOLING WITH PURON (R-410A) REFRIGERANT NOTE: To avoid injury to personnel and damage to equipment or property when completing the procedures listed in this start-up checklist, use good judgment, follow safe practices, and adhere to the safety considerations/information as outlined in preceding sec- tions of this Installation Instruction document.
  • Page 60 10. Restore set-points for thermostat and humidistat (Y/N) _____ REPEAT PROCESS FOR 2 COMPRESSOR SYSTEMS © 2019 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500263-01 Printed in U.S.A.

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