Carrier WeatherMaster 50GC 07 Series Installation Instructions Manual
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Carrier WeatherMaster 50GC 07 Series Installation Instructions Manual

Carrier WeatherMaster 50GC 07 Series Installation Instructions Manual

Single package rooftop cooling only with puron (r-410a) refrigerant
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CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . 2
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . 10
Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . 10
Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . 10
• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
Step 5 - Field Fabricate Ductwork . . . . . . . . . . . . . 12
Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . 12
Step 8 - Install Outside Air Hood . . . . . . . . . . . . . . 14
FUSED DISCONNECT OR HACR CIRCUIT BREAKER
• HACR AMP RATING
®
• TYPICAL UNIT WIRING DIAGRAMS
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500379-01
Installation Instructions
Page
Printed in U.S.A.
Form No. 50GC-7-12-01SI
Single Package Rooftop Cooling Only
with Puron
2
Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Step 12 - Install Accessories . . . . . . . . . . . . . . . . .42
Step 13 - Fan Speed Set Up . . . . . . . . . . . . . . . . . .42
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.
Untrained personnel can perform 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, including ANSI (American National
Standards Institute) Z223.1. Wear safety glasses and work gloves.
Use quenching cloth for unbrazing operations. Have fire
extinguisher available for all brazing operations.
Pg 1
WeatherMaster
50GC 07-12
®
(R-410A) Refrigerant
5-23
Replaces: New
®

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Summary of Contents for Carrier WeatherMaster 50GC 07 Series

  • Page 1: Table Of Contents

    ® WeatherMaster 50GC 07-12 Single Package Rooftop Cooling Only ® with Puron (R-410A) Refrigerant Installation Instructions CONTENTS EconoMi$er X (Factory-Installed Option) ..29 • PRODUCT DESCRIPTION Page • SYSTEM COMPONENTS SAFETY CONSIDERATIONS ....1 •...

  • Page 2: Electrical Shock Hazard

    It is important to recognize safety information. This is the safety- GENERAL alert symbol . When you see this symbol on the unit and in These installation instructions cover the 50GC size 07-12 cooling instructions or manuals, be alert to the potential for personal only units.
  • Page 3 Position: 9 10 11 12 13 14 15 16 17 18 Example: Unit Heat Type Packaging Compliance 50 = Cooling Unit with Optional 0 = Standard Electric Heat 1 = LTL Model Series - WeatherMaster ® Electrical Options GC = High Efficiency Packaged RTU A = None with EcoBlue™...
  • Page 4 Fig. 2 — Unit Dimensional Drawing — Sizes 07, 08, 09...
  • Page 5 Fig. 2 — Unit Dimensional Drawing — Sizes 07, 08, 09 (cont)
  • Page 6 Fig. 2 — Unit Dimensional Drawing — Sizes 07, 08, 09 (cont)
  • Page 7 Fig. 3 — Unit Dimensional Drawing — Size 12...
  • Page 8 Fig. 3 — Unit Dimensional Drawing — Size 12 (cont)
  • Page 9 Fig. 3 — Unit Dimensional Drawing — Size 12 (cont)

  • Page 10: Installation

    PAD-MOUNTED INSTALLATION INSTALLATION Prepare pad and unit supports Step 1 — Plan for Unit Location Check and tighten the bottom condensate drain connection Select a location for the unit and its support system (curb or other) plug that provides for the minimum clearances required for safety. This Rig and place unit includes the clearance to combustible surfaces, unit performance Convert unit to side duct connection arrangement...
  • Page 11 THIRD ANGLE DIMENSIONS ARE IN INCHES PROJECTION TOLERANCES ON: THIS DOCUMENT AND THE INFORMATION CONTAINED THEREIN IS PROPRIETARY TO CARRIER CORPORATION AND SHALL NOT 1 DEC 2 DEC 3 DEC BE USED OR DISCLOSED TO OTHERS, IN WHOLE OR IN PART, MATERIAL WITHOUT THE WRITTEN AUTHORIZATION OF CARRIER CORPORATION.

  • Page 12: Slab Mount (Horizontal Units Only)

    The accessory thru-the-base power connection package must Outlet grilles must not lie directly below unit discharge. be installed before the unit is set on the roof curb. If electric and control wiring is to be routed through the basepan, attach the accessory thru-the-base service connections to the basepan WARNING in accordance with the accessory installation instructions.

  • Page 13: Convert To Horizontal And Connect Ductwork (When Required)

    Position all seal strips in place “B” before installing unit on roof curb 36"-54" Detail “A” as close to this end as possible (914-1371) Duct End See Detail “A” “C” “A” DIMENSIONS MAX WEIGHT UNIT 50GC**07 1203 2235 40.0 1015 41.5 1055 50GC**08...

  • Page 14: Step 8 - Install Outside Air Hood

    Screws Hood Parts Plastic Tie Wrap Qty (2) Duct Covers Sheet Metal Face Up Screws for Metal Tray Qty (2) Fig. 11 — Economizer Hood Package Location Basepan Carefully lift the hood assembly (with metal tray) through the filter access opening and assemble per the steps out- lined in Economizer Hood Setup in the following section.

  • Page 15: Install External Condensate Trap And Line

    Caulk the end of the joint between the unit top panel and The piping for the condensate drain and external trap can be com- pleted after the unit is in place. See Fig. 15 and 16. the hood top. Replace the filter access panel. NOTE: If the alternate bottom drain is not used, check the drain plug for tightness prior to setting the unit on the roof curb.

  • Page 16: Field Power Wiring Connection

    NOTE: TEST LEADS - Unit may be equipped with short leads Units Without Single Point Box, Disconnect or HACR Option (pigtails) on the field line connection points on contactor C or op- tional disconnect switch or HACR, see Fig. 17. These leads are for factory run-test purposes only;...

  • Page 17: Units Without Factory-Installed Non-Fused Disconnect Or Hacr Circuit Breaker

    Make sure the HACR circuit breaker shipped from the fac- tory is at OFF position (the white arrow pointing at OFF). Insert the shaft all the way with the cross pin on the top of the shaft in the horizontal position. Tighten the locking screw to secure the shaft to the HACR circuit breaker.

  • Page 18: Convenience Outlets

    Operation on improper line voltage or GFCI excessive phase imbalance constitutes abuse and may cause dam- age to electrical components. Such operation would invalidate any Pwrd-Co applicable Carrier warranty. Fuse Switch max voltage deviation from average voltage % Voltage...

  • Page 19: All Units

    unit as shipped from the factory. If field-installed accessories are GFCI Receptacle Cover — While-In-Use added or changed in the field (for example, power exhaust, ERV), Not Included Weatherproof the HACR may no longer be of the proper amp rating and there- fore will need to be removed from the unit.

  • Page 20: Factory-Option Thru-Base Connections

    UL and local NEC standards. Use raceway shown in Fig. 31 to help with compliance as needed. Thermostat Install a Carrier-approved accessory 2-stage thermostat according to installation instructions included with the accessory. For com- plete economizer function and 2-stage compressor operation, se- lect a two-stage cooling thermostat.

  • Page 21: Heat Anticipator Settings

    HEAT ANTICIPATOR SETTINGS SINGLE POINT BOXES AND SUPPLEMENTARY FUSES Set heat anticipator settings at 0.14 amp for the first stage and When the unit MOCP device value exceeds 60-A, unit-mounted 0.14 amp for second-stage heating, when available. supplementary fuses are required for each heater circuit. These fuses are included in accessory single point boxes, with power dis- ELECTRIC HEATERS tribution and fuse blocks.

  • Page 22: Humidi-Mizer ® Control Connections

    This device may be a separate humidistat control (contact closes on rise in space RH above control setpoint) or a combi- nation thermostat-humidistat control device such as Carrier’s Edge Pro Thermidistat™ device with isolated contact set for ®...
  • Page 23 Programmable Thermostat Unit Control Board Thermostat Connections O/W2/B S RTN Fig. 40 — Typical 50GC**07-12 Unit with Humidi-MiZer Adaptive Dehumidification System and Edge ® Pro Thermidistat Device...
  • Page 24 Fig. 41 — Typical Control Wiring Diagram, Electro-Mechanical with W7220 — 50GC 07-09, 230/460/575-3-60 Units Shown...
  • Page 25 Fig. 42 — Typical Control Wiring Diagram, SystemVu™ Controller — 50GC 07-09 230/460/575-3-60 Unit Shown...
  • Page 26 Fig. 43 — Typical Power Wiring Diagram, for Units with Electro-Mechanical or SystemVu Controllers — 50GC 07-09, 230/460-3-60 Units Shown...
  • Page 27 Fig. 44 — Typical Control Wiring Diagram, Electro-Mechanical with W7220 — 50GC 12, 230/460/575-3-60 Units Shown...
  • Page 28 Fig. 45 — Typical Power Wiring Diagram, for Units with Electro-Mechanical Controller — 50GC 12, 230-3-60 Unit Shown...

  • Page 29: Economi$Er X (Factory-Installed Option)

    User Interface EconoMi$er X (Factory-Installed Option) Provides status for normal operation, setup parameters, checkout PRODUCT DESCRIPTION tests, and alarm and error conditions with a 2-line 16 character The EconoMi$er ® X system is an expandable economizer control LCD display and four button keypad. system, which includes a W7220 economizer module (controller) Electrical with an LCD and keypad (see Fig.

  • Page 30: Economizer Module Wiring Details

    Storage Temperature: Table 4 — Economizer Module - Right Hand Terminal Blocks –40°F to 150°F (–40°C to 65°C) Shipping Temperature: LABEL TYPE DESCRIPTION –40°F to 150°F (–40°C to 65°C) Top Right Terminal Blocks AUX2 I Relative Humidity: 24 vac IN The first terminal is not used.

  • Page 31: Co 2 Sensor Wiring

    • Press the ▼ (Down arrow) button to move to the next Table 5 — HH57AC081 Sensor Wiring Terminations menu. TERMINAL • Press the (Enter) button to display the first item in the TYPE DESCRIPTION NUMBER LABEL currently displayed menu. S-BUS •...

  • Page 32: Setup And Configuration

    SETUP AND CONFIGURATION Before being placed into service, the W7220 economizer module IMPORTANT: Table 7 illustrates the complete hierarchy. must be setup and configured for the installed system. Your menu parameters may be different depending on your configuration. For example, if you do not have a DCV (CO ) sensor, then IMPORTANT: During setup, the economizer module is none of the DCV parameters appear and only MIN POS will...
  • Page 33 Table 7 — W7220 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 34 Table 7 — W7220 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 SUPPLY FAN SPEED (cont)
  • Page 35 Table 7 — W7220 Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT 0°F to 50°F ENERGY RECOVERY VENTILATOR UNIT OUTDOOR AIR ERV OAT SP 32°F (–18°C to 10°C); TEMPERATURE SETPOINT increment by 1°F Only displayed when AUX1 O = ERV Exhaust fan set point for single speed units.
  • Page 36 Table 7 — W7220 Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT COOLING STAGE 3 DELAY 0 min, 5 min, Delay after stage 2 cool has been active. Turns on second stage of 15 min, then cooling when economizer is first stage and mechanical cooling is STG3 DLY 2.0h...
  • Page 37 Table 7 — W7220 Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT DISCHARGE AIR S-BUS SENSOR ERROR DA SYLK T ERR Discharge air sensor has failed or become disconnected - check wiring then replace sensor if the alarm continues. OUTSIDE AIR TEMPERATURE SENSOR ERROR OA SENS T ERR Outdoor air temperature sensor has failed or become disconnected...

  • Page 38: Standard Or Single Speed Fan Operation

    STANDARD OR SINGLE SPEED FAN OPERATION The W (heating mode) is not controlled by the W7220 but it re- quires the status to know where to position the OA damper for FAN TYPE = 1 SPEED is not used on 50GC 07-12 units. minimum position for the fan speed.

  • Page 39: 2Sp H/C (2 Speed Heat/Cool) Speed Fan Operation

    2SP H/C (2 SPEED HEAT/COOL) SPEED FAN OPERATION Refer to Table 10 for ENTH CURVE set point values. The W7220 calculates the enthalpy and dew point using the OA FAN TYPE = 2SP H/C is not used on 50GC 07-12 units temperature and humidity input from the OA enthalpy sensor.

  • Page 40: Checkout

    CHECKOUT TROUBLESHOOTING Inspect all wiring connections at the economizer module’s termi- Alarms nals, and verify compliance with the installation wiring diagrams. The economizer module provides alarm messages that display on For checkout, review the Status of each configured parameter and the 2-line LCD.

  • Page 41: Smoke Detectors

    ADDITIONAL APPLICATION DATA Smoke Detectors Smoke detectors are available as factory-installed options on Refer to the application data sheet titled “Factory-Installed Smoke 50GC models. Smoke detectors may be specified for supply air Detector, for Small and Medium Rooftop Units 2 to 25 Tons” for only, for return air without or with economizer, or in combination discussions on additional control features of these smoke detectors of supply air and return air.

  • Page 42: Step 11 - Adjust Factory-Installed Options

    Connect a multimeter to the Vdc terminals on the UCB. Step 11 — Adjust Factory-Installed Options Set the Range Switch to either A, B, or C per the Switch SMOKE DETECTORS Range table. Smoke detector(s) will be connected at the Unit Control Board Using a straight blade screwdriver, turn the Vdc control dial (UCB), at terminals marked “Smoke Shutdown.”...

  • Page 43: Units With Systemvu™ Controls

    ESP in. wg Factory Setting: Calculator 9.0 V 3000 Field Setting: 3250 Record field setting here 3500 3750 4000 Switch Range: 4250 4500 4.1 - 7.5 4750 10.0 6.9 - 8.7 5000 7.7 - 10.0 Field Accessories: Economizer * Overlap in A, B, C switch range designed for maximum field adjustment potential.
  • Page 44 ESP in. wg Calculator 1250 1348 1441 1528 1610 1688 1762 1832 1899 1963 3000 1336 1428 1515 1598 1677 1753 1824 1893 1959 2021 3250 1423 1509 1591 1670 1746 1819 1888 1955 2020 2081 3500 1510 1591 1669 1744 1817 1887...
  • Page 45 © 2023 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500379-01 Printed in U.S.A. Form No. 50GC-7-12-01SI Pg 46 5-23 Replaces: New...

  • Page 46: Preliminary Information

    START-UP CHECKLIST 50GC 07-12 SINGLE PACKAGED ROOFTOP ELECTRIC COOLING UNITS (Remove and use for job file) 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 sections of this Installation Instruction document.

  • Page 47: Humidi-Mizer

    (Y/N) _____ 10. Restore set-points for thermostat and humidistat (Y/N) _____ © 2023 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500379-01 Printed in U.S.A.

This manual is also suitable for:

Weathermaster 50gc 08 seriesWeathermaster 50gc 09 seriesWeathermaster 50gc 12 seriesWeathermaster 50gc-m06a2a6061999

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