Carrier WeatherMaster 50GC 04-06 Series Installation Instructions Manual
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Carrier WeatherMaster 50GC 04-06 Series Installation Instructions Manual

Single package rooftop cooling only/electric heat unit with puron (r-410a) refrigerant
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CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
Rated Indoor Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . . 7
Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . . 7
Step 5 - Field Fabricate Ductwork . . . . . . . . . . . . . . 9
Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . . 9
Ductwork (When Required) . . . . . . . . . . . . . . . . . 10
Step 8 - Install Outside Air Hood . . . . . . . . . . . . . . 11
• ECONOMIZER HOOD PACKAGE REMOVAL AND
EconoMi$er® X (Factory Option) . . . . . . . . . . . . . . . 24
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500269-01
Single Package Rooftop Cooling Only/Electric Heat Unit
Installation Instructions
Printed in U.S.A.
Form 50GC-4-6-03SI
with Puron
®
• ECONOMIZER MODULE WIRING DETAILS
•
Controller Options . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
• ECONOMI$ER® IV OCCUPANCY SWITCH
Step 13 - Install Accessories . . . . . . . . . . . . . . . . .37
Step 14 - Fan Speed Set Up . . . . . . . . . . . . . . . . . .38
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 litera-
ture, tags and labels attached to the unit, and other safety precau-
tions that may apply.
Follow all safety codes, including ANSI (American National Stan-
dards Institute) Z223.1. Wear safety glasses and work gloves. Use
quenching cloth for unbrazing operations. Have fire extinguisher
available for all brazing operations.
It is important to recognize safety information. This is the safety-
alert symbol
. When you see this symbol on the unit and in in-
structions or manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. These words are used with the safety-alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies hazards
which could result in personal injury or death. CAUTION is used
to identify unsafe practices, which may result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability,
or operation.
Pg 1
WeatherMaster
50GC**04-06
(R-410A) Refrigerant
12-19
Replaces: 50GC-4-6-02SI
®

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Summary of Contents for Carrier WeatherMaster 50GC 04-06 Series

  • Page 1: Table Of Contents

    ® WeatherMaster 50GC**04-06 Single Package Rooftop Cooling Only/Electric Heat Unit with Puron ® (R-410A) Refrigerant Installation Instructions • ENVIRONMENTAL CONTENTS • ECONOMIZER MODULE WIRING DETAILS SAFETY CONSIDERATIONS ....1 •...

  • Page 2: Model Number Nomenclature And Dimensions

    DANGER CAUTION ELECTRICAL SHOCK HAZARD PERSONAL INJURY HAZARD Failure to follow this warning will result in personal injury or Failure to follow this caution may result in personal injury. death. Sheet metal parts may have sharp edges or burrs. Use care and Before performing service or maintenance operations on unit, wear appropriate protective clothing, safety glasses and gloves turn off main power switch to unit and install lock(s) and lock-...
  • Page 3 Position: 9 10 11 12 13 14 15 16 17 18 Example: – – Factory Assigned Unit Heat Type 0 = Standard 50 - Electric Heat 1 = LTL Packaged Rooftop Electrical Options ® Model Series - WeatherMaster A = None GC - 16 SEER Efficiency B = HACR Breaker C = Non-Fused Disconnect (NFD)

  • Page 7: Installation

    Prepare bottom condensate drain connection to suit planned INSTALLATION condensate line routing (refer to Step 10 — Install External Jobsite Survey Condensate Trap and Line on page 12 for details) Complete the following checks before installation. Rig and place unit Consult local building codes and the NEC (National Elec- Install outdoor air hood trical Code) ANSI/NFPA 70 for special installation...

  • Page 9: Slab Mount (Horizontal Units Only)

    UNITS WITH ACCESSORY OR OPTIONAL ELECTRIC HEATERS All installations require a minimum clearance to combustible sur- faces of 1-in. (25 mm) from duct for first 12-in. (305 mm) away from unit. Outlet grilles must not lie directly below unit discharge. WARNING PERSONAL INJURY HAZARD Failure to follow this warning could cause personal injury.

  • Page 10: Step 7 - Convert To Horizontal And Connect Ductwork (When Required)

    "B" 36"- 54" DETAIL "A" PLACE ALL SEAL STRIP IN PLACE REQUIRED (914-1371) BEFORE PLACING UNIT ON ROOF CURB. SPREADER BARS DUCT END "C" "A" SEE DETAIL "A" DIMENSIONS MAX WEIGHT UNIT 50GC-*04 74.5 1890 35.5 33.5 50GC-*05 74.5 1890 35.5 33.5 50GC-*06...

  • Page 11: Step 8 - Install Outside Air Hood

    The indoor coil access panel will be used as the top of the Step 8 — Install Outside Air Hood hood. Remove the screws along the sides and bottom of the ECONOMIZER HOOD PACKAGE REMOVAL AND indoor coil access panel. See Fig. 11. SETUP (FACTORY OPTION) NOTE: Economizer is not available as factory-installed options for single phase (-3 voltage code) models.

  • Page 12: Step 9 - Units With Hinged Panels Only

    To use the alternate bottom drain connection, remove the red drain plug from the bottom connection (use a -in. square socket drive extension) and install it in the side drain connection. The piping for the condensate drain and external trap can be com- pleted after the unit is in place.

  • Page 13: Units With Factory-Installed Non-Fused Disconnect Or Hacr

    arrangement) or at factory-installed option non-fused disconnect Units Without Single Point Box, Disconnect or HACR Option switch or HACR. Maximum wire size is #2ga AWG (copper only) per pole on contactors, #2ga AWG (copper only) per pole on op- Equip tional disconnect or HACR, and 4/0 AWG (copper only) per pole GR Lug on terminal or fuse blocks on units with single point box (see...

  • Page 14: Units Without Factory-Installed Non-Fused Disconnect Or Hacr

    Measure from the tip of the shaft to the top surface of the Tighten the locking screw to secure the shaft to the HACR. black pointer; the measurement should be 3.75 to 3.88-in. (95 Turn the handle to the OFF position with red arrow pointing to 99 mm).

  • Page 15: Convenience Outlets

    terminal or fuse block on units with single point box. See Fig. 18 and unit label diagram for field power wiring connections. Provide a ground fault and short circuit over-current protection de- vice (fuse or breaker) per NEC Article 440 (or local codes). Refer to unit informative data plate for MOCP (Maximum Over-Current Protection) device size.

  • Page 16: Hacr Amp Rating

    Mount the weatherproof cover to the backing plate as shown in Fig. 26. Remove two slot fillers in the bottom of the cover to permit service tool cords to exit the cover. Check for full closing and latching. GFCI RECEPTACLE COVER - WHILE-IN-USE NOT INCLUDED WEATHERPROOF...

  • Page 17: Units Without Thru-Base Connections (Electrical Connections)

    THERMOSTAT NOTE: If electrical connections are not going to occur at this time, Select a Carrier-approved accessory thermostat. When electric tape or otherwise cover the fittings so that moisture does not get heat is installed in the 50GC unit, the thermostat must be capable into the building or conduit in the interim.

  • Page 18: Heat Anticipator Settings

    can provide this signal but they are not configured to enable this For wire runs up to 50 ft (15 m), use no. 18 AWG (American Wire signal as shipped. Gage) insulated wire [35°C (95°F) minimum]. For 50 to 75 ft (15 to 23 m), use no.

  • Page 19: Humidi-Mizer® Control Connections

    This device may be a separate humidistat control (contact closes fied for use with a 60-A fuse, regardless of actual heater ampacity, on rise in space RH above control setpoint) or a combination ther- so only 60-A fuses are necessary.) mostat-humidistat control device such as Carrier’s Edge ®...

  • Page 20: Typical Unit Wiring Diagrams

    UCB. Refer to the installation instructions Fig. 39 — Edge ® Pro Thermidistat included with the Carrier Edge Pro Thermidistat device for more information. TYPICAL UNIT WIRING DIAGRAMS See Fig. 42 and 43 for examples of typical unit control and power wiring diagrams.
  • Page 21 PROGRAMMABLE THERMOSTAT UNIT CONTROL BOARD THERMOSTAT CONNECTIONS O/W2/B SRTN Fig. 41 — Typical Rooftop Unit with Humidi-MiZer ® Adaptive Dehumidification System and Edge ® Pro Thermidistat Device...
  • Page 23 Fig. 43 — Typical 50GC 04-06 Power Wiring Diagram (208/230V Unit Shown)

  • Page 24: Economi$Er X (Factory Option)

    Electrical ® EconoMi$er X (Factory Option) • Rated Voltage — 20 to 30 Vac RMS, 50/60 Hz The EconoMi$er X system is an expandable economizer control system, which includes a W7220 economizer module (controller) • Transformer — 100 va maximum system input with an LCD and keypad (see Fig.

  • Page 25: S-Bus Sensor Wiring

    Relative Humidity Table 4 — Economizer Module - Right Hand Terminal 5% to 95% RH non-condensing Blocks ECONOMIZER MODULE WIRING DETAILS LABEL TYPE DESCRIPTION Use Fig. 45 and Tables 3 and 4 to locate the wiring terminals for Top Right Terminal Blocks the Economizer module.

  • Page 26: Co2 Sensor Wiring

    To use the keypad when working with menus: Table 5 — HH57AC081 Sensor Wiring Terminations • Press the ▲ (Up arrow) button to move to the previous menu. TERMINAL TYPE DESCRIPTION • Press the ▼ (Down arrow) button to move to the next NUMBER LABEL menu.

  • Page 27: Setup And Configuration

    IMPORTANT: Table 7 illustrates the complete hierarchy. Your menu parameters may be different depending on your IMPORTANT: During setup, the economizer module is configuration. live at all times. For example, if you do not have a DCV (CO ) sensor, then none The setup process uses a hierarchical menu structure that is easy to of the DCV parameters appear and only MIN POS will display.
  • Page 28 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...
  • Page 29 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 30 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 31 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 32 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 33: Enthalpy Settings

    ENTHALPY SETTINGS When the OA temperature, OA humidity and OA dew point are all below the selected boundary, the economizer sets the econo- When the OA temperature, enthalpy and dew point are below the mizing mode to YES, economizing is available. respective setpoints, the Outdoor Air can be used for economiz- When all of the OA conditions are above the selected boundary, ing.

  • Page 34: 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 = 1SPEED is not used on 50GC units. minimum position for the fan speed.

  • Page 35: 2Sp H/C And 3 Speed Fan Operation

    2SP H/C AND 3 SPEED FAN OPERATION FAN TYPE = 2SP H/C and FAN TYPE = 3SPEED are not used CAUTION on 50GC units. EQUIPMENT DAMAGE HAZARD CHECKOUT Failure to follow this caution may result in equipment damage. Inspect all wiring connections at the economizer module’s termi- Be sure to allow enough time for compressor start-up and shut- nals, and verify compliance with the installation wiring diagrams.
  • Page 36 may be necessary to complete the unit and smoke detector config- uration to meet project requirements. Units equipped with factory-optional return-air smoke detectors RETURN AIR SMOKE DETECTOR require a relocation of the sensor module at unit installation. See (AS SHIPPED) Fig.

  • Page 37: Step 12 - Adjust Factory-Installed Options

    • Electric heaters and single-point connection kits Step 12 — Adjust Factory-Installed Options • Manual outside air damper SMOKE DETECTORS • Two-position motorized outside air damper Smoke detector(s) will be connected at the Unit Control Board, at • EconoMi$er IV (with control) terminals marked “Smoke Shutdown.”...

  • Page 38: Step 14 - Fan Speed Set Up

    Step 14 — Fan Speed Set Up UNITS WITH ELECTRO-MECHANICAL CONTROLS The fan speed set up controls are located on the lower section of the Unit Control Board (UCB). See Fig. 53 for location. Check the job specifications for the CFM (cubic feet per min- ute) and ESP (external static pressure) required.

  • Page 39: Units With Systemvu™ Controls

    ESP in. wg Factory Setting: Calculator 7.8 V 1500 Field Setting: 1625 Record field setting here 1750 1875 2000 Switch Range: 2125 10.0 2250 4.1 - 7.5 2375 6.9 - 8.7 2500 7.7 - 10.0 Field Accessories: Economizer * Overlap in A, B, C switch range 1 Stage E Heat designed for maximum field adjustment potential.
  • Page 40 ESP in. wg Calculator 1301 1477 1639 1788 1925 2054 2174 2289 1500 1381 1544 1699 1843 1976 2101 2220 2332 1625 1463 1615 1763 1902 2031 2152 2268 2378 1750 1548 1688 1828 1962 2087 2206 2318 1875 1633 1764 1897 2025...
  • Page 42 © 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. 04-53500269-01 Printed in U.S.A. Form 50GC-4-6-03SI Pg 42 12-19A 12-19 Replaces: 50GC-4-6-02SI...

  • Page 43: Start-Up Checklist

    Start-Up Checklist for 50GC**04-06 Single Package Rooftop Cooling Only/Electric Heat Unit (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 sec- tions of this Installation Instruction document.
  • Page 44 9. Open humidistat input compressor and outdoor fan stop; LSV and DSV solenoids de-energized (Y/N) _____ 10. Restore setpoints for thermostat and humidistat (Y/N) _____ © 2019 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

This manual is also suitable for:

Weathermaster 50gc n/m/p04 seriesWeathermaster 50gc n/m/p05 seriesWeathermaster 50gc n/m/p06 series

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