Carrier WeatherMaster 50HC Series Installation Instructions Manual
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Carrier WeatherMaster 50HC 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . . 9
Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . 9
Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . . 9
Step 5 - Field Fabricate Ductwork . . . . . . . . . . . . . 11
Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . 11
Ductwork (When Required) . . . . . . . . . . . . . . . . . 12
Step 8 - Install Outside Air Hood . . . . . . . . . . . . . . 13
Economi$er® X (Factory Option) . . . . . . . . . . . . . . . 35
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500238-01
Installation Instructions
Printed in U.S.A.
Form 50HC-4-6-03SI
50HC**04-06 Single Package Rooftop
Cooling Only/Electric Heat Unit
with Puron
®
ComfortLink Control (Factory Option) . . . . . . . . . . .45
PremierLink™ (Factory Option) . . . . . . . . . . . . . . . .45
Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Step 13 - Install Accessories . . . . . . . . . . . . . . . . .47
Step 14 - Check Belt Tension . . . . . . . . . . . . . . . . .47
Pre-Start and Start-Up . . . . . . . . . . . . . . . . . . . . . . . .48
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
(R-410A) Refrigerant
12-19
Replaces: 50HC-4-6-02SI
®

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Summary of Contents for Carrier WeatherMaster 50HC Series

  • Page 1: Table Of Contents

    ® WeatherMaster 50HC**04-06 Single Package Rooftop Cooling Only/Electric Heat Unit with Puron ® (R-410A) Refrigerant Installation Instructions • INPUTS CONTENTS • OUTPUTS SAFETY CONSIDERATIONS ....1 •...

  • Page 2: Model Number Nomenclature And Dimensions

    WARNING CAUTION Electrical shock can cause personal injury and death. Shut off PERSONAL INJURY HAZARD all power to this equipment during installation. There may be Failure to follow this caution may result in personal injury. more than one disconnect switch. Tag all disconnect locations Sheet metal parts may have sharp edges or burrs.
  • 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 HC - High Efficiency B = HACR Breaker C = Non-Fused Disconnect D = Thru-The-Base Connections...

  • Page 9: Installation

    Rig and place unit. INSTALLATION Install outdoor air hood. Jobsite Survey Install condensate line trap and piping. Complete the following checks before installation. Make electrical connections. Consult local building codes and the NEC (National Elec- trical Code) ANSI/NFPA 70 for special installation Install other accessories.

  • Page 11: Alternate Unit Support (In Lieu Of Curb Or Slab Mount)

    WARNING PERSONAL INJURY HAZARD Failure to follow this warning could cause personal injury. For vertical supply and return units, tools or parts could drop into ductwork and cause an injury. Install a 90 degree turn in the return ductwork between the unit and the conditioned space.

  • Page 12: Step 7 - Convert To Horizontal And Connect Ductwork (When Required)

    "B" DETAIL "A" 36"- 54" 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 UNIT MAX WEIGHT 50HC-A04 74.5 1890 36.5 33.5 50HC-A05 74.5 1890 36.5 41.5 1055...

  • Page 13: Step 8 - Install Outside Air Hood

    ECONOMIZER AND TWO-POSITION HOOD Step 8 — Install Outside Air Hood NOTE: If the power exhaust accessory is to be installed on the ECONOMIZER AND TWO-POSITION DAMPER HOOD unit, the hood shipped with the unit will not be used and must be PACKAGE REMOVAL AND SETUP (FACTORY OPTION) discarded.

  • Page 14: Step 9 - Units With Hinged Panels Only

    DIVIDER OUTSIDE HOOD CONDENSATE PAN (SIDE VIEW) ALTERNATE STANDARD DRAIN PLUG CLEANABLE BOTTOM DRAIN SIDE DRAIN (FACTORY-INSTALLED) ALUMINUM FILTER FILTER Fig. 19 — Condensate Drain Pan (Side View) BAROMETRIC RELIEF FILTER CLIP MINIMUM PITCH Fig. 17 — Economizer Filter Installation 1˝...

  • Page 15: Units With Factory-Installed Non-Fused Disconnect Or Hacr

    The field power wires are connected to the unit at line-side pres- Units Without Single Point Box, Disconnect or HACR Option sure lugs on compressor contactor C and indoor fan contactor IFC (see wiring diagram label for control box component arrange- 1-ph Belt Drive IFM ment) or at factory-installed option non-fused disconnect switch or Direct Drive IFM...
  • Page 16 Field-Install the NFD Shaft and Handle Field-Install the HACR Shaft and Handle Remove unit front panel (see Fig. 2 and 3). Remove unit front panel (see Fig. 2 and 3). Remove (3) hex screws on the NFD enclosure — (2) on the Remove (3) hex screws on the HACR enclosure —...

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

    UNITS WITHOUT FACTORY-INSTALLED NON-FUSED PWD-CO TRANSFORMER DISCONNECT OR HACR CONVENIENCE When installing units, provide a disconnect switch per NEC (Na- OUTLET GFCI tional Electrical Code) of adequate size. Disconnect sizing data is provided on the unit informative plate. Locate on unit cabinet or within sight of the unit per national or local codes.

  • Page 18: Hacr Amp Rating

    Non-Powered Convenience Outlet Duty Cycle This type requires the field installation of a general-purpose 125-v The unit-powered convenience outlet has a duty cycle limitation. 15A circuit powered from a source elsewhere in the building. Ob- The transformer is intended to provide power on an intermittent serve national and local codes when selecting wire size, fuse or basis for service tools, lamps, etc;...

  • Page 19: Units Without Thru-Base Connections (Electrical Connections)

    HIGH VOLTAGE CONDUIT may cause damage to electrical components. Such operation CONNECTOR would invalidate any applicable Carrier warranty. max voltage deviation from average voltage % Voltage = 100 x Imbalance average voltage Fig.

  • Page 20: Field Control Wiring

    Pull the wires over to the terminal Link™ controller (available as factory-installed option or as field- strip on the upper-left corner of the Controls Connection Board. installed accessory, for use on a Carrier Comfort Network ® or as a See Fig.
  • Page 21 Single Point Boxes and Supplementary Fuses DISCONNECT MOUNTING When the unit MOCP device value exceeds 60-A, unit-mounted LOCATION supplementary fuses are required for each heater circuit. These fuses are included in accessory single point boxes, with power dis- tribution and fuse blocks. The single point box will be installed di- rectly under the unit control box, just to the left of the partition separating the indoor section (with electric heaters) from the out- door section.

  • 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 combination ther- mostat-humidistat control device such as Carrier’s Edge ® Thermidistat™ with isolated contact set for dehumidification con- trol.

  • Page 23: Control And Power Wiring Diagrams

    (field-supplied) through the hole provided in the unit corner post. the LTLO switch with field-supplied wire nuts. Refer to the installation instructions included with the Carrier Edge ® Feed wires through the raceway built into the corner post (see Thermidistat device for more information.
  • Page 24 EDGE Pro THERMIDISTAT Unit CTB THERMOSTAT O/W2/B SRTN Humidi-MiZer™ FIOP *Connection not required. Fig. 46 — Typical Rooftop Unit with Humidi-MiZer Adaptive Dehumidification System and Edge Pro Thermidistat Device...
  • Page 27 Fig. 49 — Electro-Mechanical Control Power Wiring Diagram...

  • Page 35: 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 36: Economizer Module Wiring Details

    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. 58 and Tables 3 and 4 to locate the wiring terminals for Top Right Terminal Blocks the Economizer module.

  • Page 37: Interface Overview

    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 38: Setup And Configuration

    the cooling coil. This unit application has the control sensor locat- The setup process uses a hierarchical menu structure that is easy to ed after the cooling coil, in the fan section, where it is designated use. Press the ▲ and ▼ arrow buttons to move forward and back- as (Cooling) Supply Air Temperature or SAT sensor.
  • Page 39 Table 7 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † DAMPER OUT 2.0v 2.0 to 10.0v Displays voltage output to the damper actuator.*** ACT POS 0 to 100% Displays actual position of actuator Displays number of times actuator has cycled.
  • Page 40 Table 7 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † DCV MINIMUM DAMPER POSITION 2 to 10 vdc or 100 Displays only if a CO sensor is connected. Used for Va to 9990 cfm (ventilation min cfm) set point.
  • Page 41 Table 7 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † NONE Used for alarm for when the DA air temperature is too low. Set 35°F to 65°F DA LO ALM 45°F (7°C) lower range of alarm, below this temperature the alarm will show (2°C to 18°C);...
  • Page 42 Table 7 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † ACTUATOR ERROR Actuator has failed or become disconnected - check for stall, ACT ERROR over voltage, under voltage and actuator count. Replace actuator if damper is movable and supply voltage is between 21.6 V and 26.4 V.
  • Page 43 Table 9 — Dry Bulb Operation without DCV (CO Sensor) — 1 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I FAN SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED VENTILATION (DCV) ECONOMIZE High 0-v/Off 0-v/Off MIN POS Closed High 24-v/On 0-v/Off MIN POS Closed High...
  • Page 44 Table 12 — Enthalpy 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 0-v/Off 0-v/Off Closed VENTMIN High 24-v/On 0-v/Off Closed VENTMIN High 24-v/On 24-v/On Closed...

  • Page 45: Enthalpy Settings

    ENTHALPY SETTINGS When the OA temperature, enthalpy and dew point are below the CAUTION respective set points, the Outdoor Air can be used for economiz- ing. Figure 62 shows the new single enthalpy boundaries in the EQUIPMENT DAMAGE HAZARD W7220. There are 5 boundaries (set points ES1 through ES5), Failure to follow this caution may result in equipment damage.

  • Page 46: Additional Application Data

    Units equipped with factory-optional return air smoke detectors require a relocation of the sensor module at unit installation. See RETURN AIR SMOKE DETECTOR Fig. 63 for the as-shipped location. (AS SHIPPED) Completing Return Air Smoke Sensor Installation Unscrew the two screws holding the return air smoke detector assembly.

  • Page 47: Step 12 - Adjust Factory-Installed Options

    Fig. 65 — EconoMi$er IV Wiring • sensor Step 12 — Adjust Factory-Installed Options • DDC interface (PremierLink™) SMOKE DETECTORS • Louvered hail guard Smoke detector(s) will be connected at the Controls Connections • Motormaster ® head pressure controls Board, at terminals marked “Smoke Shutdown.” Cut jumper JMP 3 when ready to energize unit.

  • Page 48: Belt Tension Method

    BELT TENSION METHOD BELT DEFLECTION FORCE - SEE TABLE 1 Requires belt tension gage that measures tension in belt in units of lbs force. DEFLECTION = BELT SPAN BLOWER PULLEY STRAIGHT V-BELT EDGE SCREW MOTOR SCREW PULLEY MOTOR TORQUE ALL SHEAVE SET SCREWS TO 110-130 in. lbs TABLE 1 BELT DEFLECTION FORCE (LBS) BELT...
  • Page 50 © 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. 04-53500238-01 Printed in U.S.A. Form 50HC-4-6-03SI Pg 50 12-19 Replaces: 50HC-4-6-02SI...
  • Page 51 START-UP CHECKLIST FOR 50HC 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 52 9. Open humidistat input compressor and outdoor fan stop; LSV and DSV solenoids de-energized (Y/N) _____ 10. Restore set-points 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.

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