Carrier WeatherMaster 50HC14 Installation Instructions Manual
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Carrier WeatherMaster 50HC14 Installation Instructions Manual

Carrier WeatherMaster 50HC14 Installation Instructions Manual

Single package rooftop cooling only unit with puron (r-410a) refrigerant
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Download this manual See also: Service and Maintenance Instructions
50HC 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.
50HC 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
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . . ..2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . . . . 6
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Step 8 - Install Outside Air Hood . . . . . . . . . . . . . . . 11
Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Single Point Boxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
®
®
Drive (Factory Option) . . . . . . . . . . . . . . . . . . . . . . . 38
Supply Air Temperature Sensor . . . . . . . . . . . . . . . . . 46
Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Economizer Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
RTU Open Control System . . . . . . . . . . . . . . . . . . . . . . 52
Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Communication Wiring - Protocols . . . . . . . . . . . . 58
Local Access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Outdoor Air Enthalpy Control . . . . . . . . . . . . . . . . . . . 60
Smoke Detectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Step 12 - Install Accessories. . . . . . . . . . . . . . . . . . . 62
Step 13 - Check Belt Tension . . . . . . . . . . . . . . . . . . 62
Pre-Start and Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . CL-1
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500209-01
Single Package Rooftop Cooling Only Unit
Installation Instructions
Page
Printed in U.S.A.
Form 50HC-14-03SI
®
with Puron
(R-410A) Refrigerant

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical
shock or other conditions which may cause personal injury
or property damage. Consult a qualified installer, service
agency, or your distributor or branch for information or as-
sistance. The qualified installer or agency must use factory-
authorized kits or accessories when modifying this product.
Refer to the individual instructions packaged with the kits
or accessories when installing.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloths for brazing operations and
have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions attached to
the unit. Consult local building codes and appropriate na-
tional electrical codes (in USA, ANSI/NFPA70, National
Electrical Code (NEC); in Canada, CSA C22.1) for special
requirements.
It is important to recognize safety information. This is
the safety-alert symbol
the unit and in instructions or manuals, be alert to the poten-
tial for personal injury.
Understand the signal words DANGER, WARNING,
CAUTION, and NOTE. These words are used with the safe-
ty-alert symbol. DANGER identifies the most serious haz-
ards 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 prac-
tices, which may result in minor personal injury or product
and property damage. NOTE is used to highlight sugges-
tions which will result in enhanced installation, reliability,
or operation.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal injury or
death.
Before performing service or maintenance operations on
unit, turn off main power switch to unit and install lock(s)
and lockout tag(s). Ensure electrical service to rooftop unit
agrees with voltage and amperage listed on the unit rating
plate. Unit may have more than one power switch.
Pg 1
WeatherMaster
50HC14
. When you see this symbol on
WARNING
8-18
Replaces: 50HC-14-02SI
®

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Summary of Contents for Carrier WeatherMaster 50HC14

  • Page 1: Table Of Contents

    Puron (R-410A) Refrigerant Installation Instructions 50HC 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.

  • Page 2: Rated Indoor Airflow (Cfm)

    WARNING WARNING UNIT OPERATION AND SAFETY HAZARD CUT HAZARD Failure to follow this warning could cause personal injury, Failure to follow this caution may result in personal injury. death and/or equipment damage. Sheet metal parts may have sharp edges or burrs. Use care Puron ®...
  • Page 3 Position: 10 11 12 13 14 15 16 17 18 Example: Unit Heat Type Factory Assigned 50 - Electric Heat 0 = Standard Packaged Rooftop 1 = LTL ® Model Series - WeatherMaster Electrical Options HC - High Efficiency A = None B = HACR Breaker C = Non-Fused Disconnect Heat Options...
  • Page 4 Fig. 2 — Unit Dimensional Drawing — 14 Size Unit...
  • Page 5 Fig. 2 — Unit Dimensional Drawing — 14 Size Unit (cont)

  • Page 6: Installation

    LOCATION DIMENSION CONDITION 48-in. (1219 mm) Unit disconnect is mounted on panel 18-in. (457 mm) No disconnect, convenience outlet option 18-in. (457 mm) Recommended service clearance 12-in. (305 mm) Minimum clearance 42-in. (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall) 36-in.

  • Page 7: Step 2 - Plan For Sequence Of Unit Installation

    Install other accessories. Step 2 — Plan for Sequence of Unit Installation The support method used for this unit will dictate different FRAME-MOUNTED INSTALLATION sequences for the steps of unit installation. For example, on Frame-mounted applications generally follow the se- curb-mounted units, some accessories must be installed on quence for a curb installation.
  • Page 8 Fig. 4 — Roof Curb Details...

  • Page 9: Step 5 - Field Fabricate Ductwork

    Ducts passing through unconditioned spaces must be in- sulated and covered with a vapor barrier. If a plenum return is used on a vertical unit, the return should be ducted through the roof deck to comply with ap- plicable fire codes. FOR UNITS WITH ACCESSORY OR OPTIONAL ELEC- TRIC HEATERS All installations require a minimum clearance to com-...
  • Page 10 PLACE ALL SEAL STRIP IN PLACE BEFORE PLACING UNIT ON ROOF CURB. 36"-54" “B” (914-1371) “C” DUCT END DETAIL “A” “A” SEE DETAIL “A” DIMENSIONS WEIGHT UNIT 50HC**14 2105 116.0 2945 62.5 1590 59.5 1510 NOTES: 1. SPREADER BARS REQUIRED — Top damage will occur if spreader bars are not used.

  • Page 11: Step 7 - Convert To Horizontal And Connect

    Step 7 — Convert to Horizontal and Connect SCREWS Ductwork (When Required) Unit is shipped in the vertical duct configuration. Unit without factory-installed economizer or return air smoke de- tector option may be field-converted to horizontal ducted configuration. To convert to horizontal configuration, remove screws from side duct opening covers (see Fig.
  • Page 12 Hood Parts Plastic Tie Wrap Qty (2) FILTER ACCESS PANEL Screws for Metal Tray INDOOR COIL ACCESS PANEL Qty (2) Fig. 12 — Typical Access Panel Locations Fig. 14 — Two-Position Damper Hood Package Location ECONOMIZER HOOD AND TWO-POSITION HOOD NOTE: If the power exhaust accessory is to be installed on the unit, the hood shipped with the unit will not be used and must be Remove Hood Parts...

  • Page 13: Step 9 - Install External Condensate Trap And Line

    Step 9 — Install External Condensate Trap and Line The unit has one -in. condensate drain connection on the SIDE end of the condensate pan and an alternate connection on the PANEL bottom. See Fig. 18. Unit airflow configuration does not de- termine which drain connection to use.

  • Page 14: Step 10 - Make Electrical Connections

    Step 10 — Make Electrical Connections WARNING ELECTRIC SHOCK HAZARD Failure to follow this warning could result in personal injury or death. Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur.
  • Page 15 Units Without Single Point Box, Disconnect or HACR Option Equip GR Lug Disconnect Ground (GR) 208/230-3-60 460-3-60 575-3-60 Units With Disconnect or HACR Option Optional Fig. 24 — Mounting Position for Field Disconnects Disconnect (up to 100A) Switch Factory or HACR Wiring Field power wires are connected to the unit at line-side pressure lugs at the main terminal block (TB1) or at factory-...
  • Page 16 Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to ALUMINUM electrical components. Such operation would invalidate WIRE any applicable Carrier warranty. Fig. 26 — Disconnect Switch and Unit NOTE: Check all factory and field electrical connections for ALL UNITS tightness.
  • Page 17 Remove the unit front panel (see Fig. 2). Remove three hex screws on the NFD enclosure - two on the face of the cover and one on the bottom. Remove the front cover of the NFD enclosure. Make sure the NFD shipped from the factory is at OFF position (the arrow on the black handle knob is at OFF).
  • Page 18 Pwd-CO Fuse Switch Pwd-CO Transformer Convenience Outlet GFCI Disconnect Access Panel Fig. 31 — Convenience Outlet Location Unit-powered type A unit-mounted transformer is factory-installed to step- Fig. 30 — Handle and Shaft Assembly for HACR down the main power suppl voltage to the unit to 115-v at the duplex receptacle.
  • Page 19 Installing Weatherproof Cover A weatherproof while-in-use cover for the factory-in- NOTICE/AVIS stalled convenience outlets is now required by UL standards. This cover cannot be factory-mounted due to its depth; it Convenience Outlet Utilization must be installed at unit installation. For shipment, the conve- Maximum Intermittent Use 15 - Amps Maximum Continuous Use 8 - Amps nience outlet is covered with a blank cover plate.
  • Page 20 The 50HC**14 unit requires an external temperature con- trol device. This device can be a thermostat (field-supplied) or a PremierLink™ controller (available as factory-installed option or as field-installed accessory, for use on a Carrier Comfort Network ® or as a standalone control) or the RTU ”...
  • Page 21 75 ft (15 m to 23 m), use no. 16 AWG insulated wire (35°C and up to the web bushing near the control box. Route the minimum). For over 75 ft (23 m), use no. 14 AWG insulated wire through the bushing and into the bottom left side of the wire (35°C minimum).

  • Page 22: Electric Heaters

    (contact closes on rise in space RH above control setpoint) or HEATER AND SUPPLEMENTARY FUSES a combination thermostat-humidistat control device such as Carrier’s Edge ® Pro Thermidistat with isolated contact set for When the unit MOCP device value exceeds 60-A, unit- dehumidification control.
  • Page 23 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 Pro Thermidistat device for more infor- mation. % RELATIVE HUMIDITY...
  • Page 24 ® Fig. 46 — Typical Humidi-MiZer Adaptive Dehumidification System Humidistat Wiring...

  • Page 25: Economi$Er

    Edge Programable Thermostat Unit CTB THERMOSTAT O/W2/B SRTN Humidi-MiZer™ FIOP *Connection not required. Fig. 47 — 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 mod- PRODUCT DESCRIPTION ule, 20k mixed air sensor, damper actuator, and either a 20k The EconoMi$er X system is an expandable economizer...
  • Page 26 Relay Digital Output Rating at 30 Vac (maximum power NOTE: The four terminal blocks are removable. You can slide from Class 2 input only) — 1.5A run: out each terminal block, wire it, and then slide it back into place. 3.5A inrush at 0.45PF (200,000 cycles) or 7.5A inrush at 0.45PF (100,000 cycles) External Sensors Power Output —...
  • Page 27 Table 5 — Economizer Module - Right Hand Table 6 — HH57AC081 Sensor Wiring Terminations Terminal Blocks TERMINAL TYPE DESCRIPTION LABEL TYPE DESCRIPTION NUMBER LABEL Top Right Terminal Blocks S-BUS Communications AUX2 I 24 vac IN The first terminal is not used. S-BUS S-BUS (Enthalpy Control...
  • Page 28 To use the keypad when working with menus: Press the (Enter) button to return to the current menu parameter. • Press the ▲ (Up arrow) button to move to the previous menu. 10. Press the (Menu Up/Exit) button to return to the pre- vious menu.
  • Page 29 Table 8 — 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 30 Table 8 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT EXHAUST STAGE 2 RELAY OUTPUT EXH2 OUT ON/OFF Output of AUX terminal; displays only if AUX = EXH2 ENERGY RECOVERY VENTILATOR ON/OFF Output of AUX terminal; displays only if AUX = ERV MECH COOL ON Displays stage of mechanical cooling that is active.
  • Page 31 Table 8 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT Display order = MM/DD/YY INSTALL 01/01/10 Setting order = DD, MM, then YY. UNITS DEG F or C Sets economizer controller in degrees Fahrenheit or Celsius CONV = conventional;...
  • Page 32 Table 8 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT SUPPLY AIR TEMPERATURE CALIBRATION MAT T CAL 0.0 F ±2.5°F Allows for the operator to adjust for an out of calibration temperature sensor. OUTSIDE AIR TEMPERATURE CALIBRATION OAS T CAL 0.0 F ±2.5°F...
  • Page 33 Table 8 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT AUX2 IN is programmed for SHUTDOWN and 24-v has been SHUTDOWN ACTIVE applied to AUX2 IN terminal. DAMPER CALIBRATION ROUTINE RUNNING If DCV Auto enable has been programmed, when the W7220 is completing a calibration on the dampers, this alarm will display.
  • Page 34 Table 9 — Damper Minimum Position Settings and Readings on Checkout Menu DEMAND CONTROLLED VENTILATION FAN SPEED SETPOINTS CHECKOUT SENSOR) MIN POS VMAX–HS MIN POS H VMAX–HS MIN POS L VMAX–LS VENT MIN VMAX–HS VENT MAX VMAX–HS VENT MIN H VMAX–HS VENT MAX H VMAX–LS...
  • Page 35 Table 12 — Enthalpy Operation No 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 MIN POS Closed NONE HIGH 24-v/On 0-v/Off MIN POS Closed HIGH 24-v/On...
  • Page 36 Table 15 — Dry Bulb 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 0-v/Off 0-v/Off VENTMIN Closed 24-v/On 0-v/Off VENTMIN Closed HIGH 24-v/On 24-v/On VENTMIN Closed...
  • Page 37 ECONOMIZING DUAL ENTHALPY AVAILABLE HIGH LIMIT NOT AVAILABLE SINGLE ENTHALPY P2 (T,RH) (T,RH) TEMPERATURE Fig. 53 — Single Enthalpy Curve Boundaries Table 18 — Single Enthalpy and Dual Enthalpy High Limit Curves POINT P1 POINT P2 ENTHALPY TEMP. DRY TEMP. ENTHALPY HUMIDITY HUMIDITY...

  • Page 38: Low Ambient Control (Factory Option)

    TROUBLESHOOTING WARNING Alarms Failure to follow this warning could result in personal injury, The economizer module provides alarm messages that property damage, or death. display on the 2-line LCD. Before performing service or maintenance operations on NOTE: Upon power up, the module waits 60 minutes before unit, always turn off main power switch to unit and install checking for alarms.
  • Page 39 Fig. 54 — 50HC14 Control Box Component Locations with ComfortLink Controls...
  • Page 40 Fig. 55 — 50HC14 ComfortLink Control Wiring Diagram...
  • Page 41 Fig. 56 — 50HC14 ComfortLink Power Wiring Diagram...
  • Page 42 ® Fig. 57 — 50HC14 ComfortLink with Humidi-MiZer Power Wiring Diagram...

  • Page 43: Premierlink Controller (Factory Option)

    FIOP/accessory EconoMi$er 2 package. System Pilot™, Touch Pilot™ and Service Tool. (Standard The PremierLink controller requires the use of a Carrier tier display tools Navigator™ and Scrolling Marquee are not electronic thermostat or a CCN connection for time broadcast suitable for use with latest PremierLink controller (Version to initiate its internal timeclock.
  • Page 44 Fig. 60 — PremierLink Wiring Schematic...
  • Page 45 ® Fig. 61 — PremierLink™ Wiring Schematic with Humidi-MiZer System Option...

  • Page 46: Supply Air Temperature Sensor

    troubleshooting information. Have a copy of this manual Supply Air Temperature (SAT) Sensor available at unit set-up. On FIOP-equipped 50HC 14 units, the unit is supplied NOTE: The sensor must be mounted in the discharge airstream with a supply-air temperature (SAT) sensor (33ZCSENSAT). downstream of the cooling coil and any heating devices.
  • Page 47 Digital, 5 vdc AUX OUT(Power Exhaust) (Output) Discrete 24 vac CCN —(BLK) Digital, 5 vdc LEGEND — Carrier Comfort Network (communication bus) CMPSAFE — Compressor Safety FILTER — Filter Switch — Fire Shutdown — Indoor Air Quality (CO — Outdoor Air Quality (CO —...
  • Page 48 The PremierLink™ controller is factory-shipped config- Connect this sensor to TB3-1 and TB3-3 per Fig. 64. ured for Space Sensor Mode. A Carrier T-55 or T-56 space sensor must be used. T-55 space temperature sensor provides a signal of space temperature to the PremierLink controller.

  • Page 49: Economizer Controls

    CONFIGURE THE UNIT FOR THERMOSTAT MODE separate isolated 24 vac power source to the sensor and to connect the sensor to the control board terminals. Connect to the CCN bus using a CCN service tool and To connect the sensor to the control, identify the positive navigate to PremierLink Configuration screen for Operating (4 to 20 mA) and ground (SIG COM) terminals on the sensor.
  • Page 50 FILTER STATUS SWITCH The sensor must be mounted vertically on the wall. The This function is available only when the PremierLink con- Carrier logo should be oriented correctly when the sensor is troller is configured for (Space) Sensor Mode. properly mounted.
  • Page 51 Ar- are required every 1000 ft. range the switch contact to be open on NO FLOW and to NOTE: Carrier device default is 9600 baud. close as pressure rises, indicating fan operation. Communications Bus Wire Specifications Connect one side of the switch’s NO contact set to CTB’s...

  • Page 52: Rtu Open Control System

    installation and checkout. See Table 24 for the recommended RTU Open Controller System color code. The RTU Open controller is factory-mounted in the 50HC**14 unit’s main control box, to the left of the CTB. Table 24 — Color Code Recommendations See Fig.
  • Page 53 Fig. 80 — RTU Open System Control Wiring Diagram...
  • Page 54 ® Fig. 81 — RTU Open System Control Wiring Diagram with Humidi-MiZer System Option...
  • Page 55 “Run Enable” status. See Input/Output section for additional instructions. The RTU Open controller requires the use of a Carrier Re-position the sensor in the flange of the supply-air opening space sensor. A standard thermostat cannot be used with the or in the supply air duct (as required by local codes).

  • Page 56: Field Connections

    2. Connect the SET terminal (STO or BLK) to J20 SPACE TEMPERATURE (SPT) SENSORS BLK (STO) There are two types of SPT sensors available from Carrier: J20-3 resistive input non-communicating (T-55, T-56, and T-59) and Rnet communicating (SPS, SPPL, SPP, and SPPF) sen- BRN (COM) sors.
  • Page 57 Do not mount the IAQ sensor in drafty areas such as near units these pink wires must be connected to J11 7 and 8 to al- supply ducts, open windows, fans, or over heat sources. Al- low the Open board to operate the dehumidification function low at least 3 ft (0.9 m) between the sensor and any corner.

  • Page 58: Communication Wiring - Protocols

    Humidistat Remote Occupancy The accessory humidistat provides the RTU Open control- The remote occupancy accessory is a field-installed acces- ler insight to the relative humidity in the space. The humidi- sory. This accessory overrides the unoccupied mode and puts stat reads the RH level in the space and compares it to its set- the unit in occupied mode.

  • Page 59: Local Access

    Local Access WALL MOUNTED EQUIPMENT TOUCH INTERFACE The Equipment Touch interface is a wall mounted inter- face used to connect to the RTU Open controller to access the control information, read sensor values, and maintenance. This is an accessory interface that does not come with the RTU Open controller.

  • Page 60: Outdoor Air Enthalpy Control

    Table 26 — LEDs The LEDs on the RTU Open Control Board (see Fig. 79) show the status of certain functions If this LED is on... Status is... The RTU Open controller has power Power The RTU Open controller is receiving data from the network segment The RTU Open controller is transmitting data over the network segment The binary output is active The Run and Error LEDs indicate control module and network status...
  • Page 61 Units equipped with factory-optional Return Air smoke detectors require a relocation of the sensor module at unit in- RETURN AIR stallation. See Fig. 95 for the as shipped location. SMOKE DETECTOR (AS SHIPPED) Completing Installation of Return Air Smoke Sensor: Unscrew the two screws holding the Return Air Smoke Detector assembly.

  • Page 62: Step 11 - Adjust Factory-Installed Options

    Unit Without Economizer or Economizer 2 Position Damper 2 Position Damper Fig. 97 — EconoMi$er ® IV Wiring • Outdoor coil protector grille Step 11 — Adjust Factory-Installed Options • Head pressure control SMOKE DETECTORS • Programmable setback thermostat Smoke detector(s) will be connected at the Controls Con- •...

  • Page 63: Pre-Start And Start-Up

    Adjust belt tension by loosing the motor mounting plate BELT TENSION METHOD front bolts and rear bolt (see Fig. 99) and slide the plate to- Requires belt tension gauge that measures tension in belt wards the fan (to reduce tension) or away from the fan (to in- in units of lbs force.
  • Page 66 © 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. 04-53500209-01 Printed in U.S.A. Form 50HC-14-03SI Pg 66 8-18 Replaces: 50HC-14-02SI...

  • Page 67: Start-Up Checklist

    START-UP CHECKLIST (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 Instructions document.
  • Page 68 10. RESTORE SETPOINTS FOR THERMOSTAT AND HUMIDISTAT  REPEAT PROCESS FOR 2 COMPRESSOR SYSTEMS © 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. 04-53500209-01 Printed in U.S.A.

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