Carrier WeatherMaster 48HC07-12 Installation Instructions Manual
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Carrier WeatherMaster 48HC07-12 Installation Instructions Manual

Carrier WeatherMaster 48HC07-12 Installation Instructions Manual

Single package rooftop gas heat/electric cooling unit with puron r-410a refrigerant
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Single Package Rooftop Gas Heat/Electric Cooling Unit
48HC 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.
48HC 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. . . . . . . . . . . . . . . . . . . . 1-8
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . . ..2
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-62
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . . . . 8
Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . . . . 9
Step 5 - Field Fabricate Ductwork. . . . . . . . . . . . . . 11
Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . . . 11
Step 7 - Install Outside Air Hood. . . . . . . . . . . . . . 13
Step 8 - Install Flue Hood . . . . . . . . . . . . . . . . . . . . . . 14
Step 9 - Install Gas Piping . . . . . . . . . . . . . . . . . . . . . 14
Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
®
Drive (Factory Option) . . . . . . . . . . . . . . . . . . . . . . . 37
®
(Factory Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Economizer Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
RTU Open Controller System . . . . . . . . . . . . . . . . . . . 50
Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Communication Wiring - Protocols . . . . . . . . . . . . 57
Local Access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Outdoor Air Enthalpy Control . . . . . . . . . . . . . . . . . . . 59
Smoke Detectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Step 13 - Install Accessories. . . . . . . . . . . . . . . . . . . 61
Step 14 - Check Belt Tension . . . . . . . . . . . . . . . . . . 61
Pre-Start and Start-Up . . . . . . . . . . . . . . . . . . . . . . . . 62
START-UP CHECKLIST . . . . . . . . . . . . . . . . . CL-1, CL-2
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480177-01
Installation Instructions
Page
Printed in U.S.A.
Form 48HC-7-12-05SI
®
with Puron
(R-410A) Refrigerant

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, main-
tenance, 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 assistance. The quali-
fied installer or agency must use factory-authorized kits or ac-
cessories 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. Con-
sult local building codes and appropriate national electrical
codes (in USA, ANSI/NFPA 70, 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
. When you see this symbol on the unit
and in instructions or manuals, be alert to the potential for per-
sonal injury.
Understand the signal words DANGER, WARNING, CAU-
TION, 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 signi-
fies hazards which could result in personal injury or death.
CAUTION is used to identify unsafe practices, which may re-
sult in minor personal injury or product and property damage.
NOTE is used to highlight suggestions which will result in en-
hanced installation, reliability, or operation.
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect gas piping from unit when leak testing at pres-
sure greater than 0.5 psig (3450 Pa). Pressures greater than
0.5 psig (3450 Pa) will cause gas valve damage resulting in
hazardous condition. If gas valve is subjected to pressure
greater than 0.5 psig (3450 Pa), it must be replaced before
use. When pressure testing field-supplied gas piping at
pressures of 0.5 psig (3450 Pa) or less, a unit connected to
such piping must be isolated by closing the manual gas
valve.
Pg 1
WeatherMaster
48HC07-12
WARNING
3-18
Replaces: 48HC-7-12-04SI
®

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Summary of Contents for Carrier WeatherMaster 48HC07-12

  • Page 1: Table Of Contents

    Puron (R-410A) Refrigerant Installation Instructions 48HC 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 FIRE HAZARD ELECTRICAL SHOCK HAZARD Failure to follow this warning could cause personal injury Failure to follow this warning could result in personal or death. injury, death, and/or property damage. Before performing service or maintenance operations on Inlet pressure tap set screw must be tightened and in.
  • Page 3 Position: 10 11 12 13 14 15 16 17 18 Example: Unit Heat Type Factory Assigned 48 - Gas Heat Packaged Rooftop 0 = Standard 1 = LTL Model Series - WeatherMaster ® HC - High Efficiency Electrical Options A = None B = HACR Breaker Heat Options C = Non-Fused Disconnect...
  • Page 4 Fig. 2 — Unit Dimensional Drawing — Sizes 07-09...
  • Page 5 Fig. 2 — Unit Dimensional Drawing — Sizes 07-09 (cont)
  • Page 6 Fig. 3 — Unit Dimensional Drawing — Sizes 11 and 12...
  • Page 7 Fig. 3 — Unit Dimensional Drawing — Sizes 11 and 12 (cont)

  • Page 8: 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 9: Step 2 - Plan For Sequence Of Unit Installation

    Locate mechanical draft system flue assembly at least 4 ft Check and tighten the bottom condensate drain connection (1.2 m) from any opening through which combustion products plug could enter the building, and at least 4 ft (1.2 m) from any adja- Rig and place unit cent building (or per local code).
  • Page 10 Fig. 5 — Roof Curb Details — Sizes 07-12...

  • Page 11: Step 5 - Field Fabricate Ductwork

    Fabricate supply ductwork so that the cross sectional di- mensions are equal to or greater than the unit supply duct open- ing dimensions for the first 18 in. (458 mm) of duct length from the unit basepan. Insulate and weatherproof all external ductwork, joints, and roof openings with counter flashing and mastic in accordance with applicable codes.
  • Page 12 DIMENSIONS WEIGHT UNIT 48HC*(A,B,D,E)07 1200 88.0 2235 44.0 1120 41.5 1055 48HC*(D,E)08 1420 88.0 2235 44.0 1120 49.5 1255 48HC*(D,E)09 1420 88.0 2235 44.0 1120 49.5 1255 48HC*(D,E)11/12 1665 88.0 2235 32.0 49.5 1255 NOTES: 1. SPREADER BARS REQUIRED — Top damage will occur if spreader bars are not used.

  • Page 13: Step 7 - Install Outside Air Hood

    Step 7 — Install Outside Air Hood ECONOMIZER AND TWO POSITION DAMPER HOOD FILTER ACCESS PANEL PACKAGE REMOVAL AND SETUP FACTORY — OPTION 1. The hood is shipped in knock-down form and must be field assembled. The indoor coil access panel is used as the hood top while the hood sides, divider and filter are packaged together, attached to a metal support tray using plastic stretch wrap, and shipped in the return air com-...

  • Page 14: Step 8 - Install Flue Hood

    Installation of the Step 9 — Install Gas Piping — gas piping must be accordance with local building codes and with applicable national codes. In U.S.A., refer to NFPA 54/ ANSI Z223.1 National Fuel Gas Code (NFGC). In Canada, in- PANEL stallation must be in accordance with the CAN/CSA B149.1 and CAN/CSA B149.2 installation codes for gas burning appli-...
  • Page 15 Install a gas supply line that runs to the unit heating section. The thru-base gas connector has male and female threads. Refer to the NFPA 54/NFGC or equivalent code for gas pipe The male threads protrude above the basepan of the unit; the sizing data.

  • Page 16: Step 10 - Install External Condensate Trap And Line

    4. Pressure-test all gas piping in accordance with local and national plumbing and gas codes before connecting pip- ing to unit. NOTE: Pressure test the gas supply system after the gas supply piping is connected to the gas valve. The supply piping must 9”...

  • Page 17: Step 11 - Make Electrical Connections

    socket drive extension) and install it in the side drain connec- NOTE: Field-supplied wiring shall conform with the limita- tion. tions of minimum 63°F (3°C) rise. FIELD POWER SUPPLY — If equipped with optional Pow- ered Convenience Outlet: The power source leads to the conve- nience outlet’s transformer primary are not factory connected.
  • Page 18 4. Make sure the NFD shipped from the factory is at OFF position (the arrow on the black handle knob is at OFF). WARNING 5. Insert the shaft with the cross pin on the top of the shaft in the horizontal position. FIRE HAZARD 6.
  • Page 19 HACR circuit breaker enclosure. abuse and may cause damage to electrical components. Such 11. Re-install the unit front panel. operation would invalidate any applicable Carrier warranty. Unbalanced 3-Phase Supply Voltage: IMPORTANT: Never operate a motor where a phase imbalance in supply voltage is greater than 2%.
  • Page 20 CONVENIENCE OUTLETS COVER – WHILE-IN-USE RECEPTACLE WARNING WEATHERPROOF NOT SHOWN ELECTRICAL OPERATION HAZARD Failure to follow this warning could result in personal injury or death. Units with convenience outlet circuits may use multiple disconnects. Check convenience outlet for power status before opening unit for service.
  • Page 21 (field-supplied) or a PremierLink™ controller (avail- L1: RED able as factory-installed option or as field-installed accessory, L2: GRA for use on a Carrier Comfort Network ® or as a stand alone con- trol) or the RTU Open Controller for Building Management Fig.

  • Page 22: Humidi-Mizer

    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 with isolated contact set for dehumidifi- ®...
  • Page 23 ® Fig. 38 — Typical Humidi-MiZer Adaptive Dehumidification System Humidistat Wiring...
  • Page 24 Edge Programable Thermostat Unit CTB THERMOSTAT O/W2/B SRTN Humidi-MiZer™ FIOP *Connection not required. Fig. 39 — Typical Rooftop Unit with Humidi-MiZer Adaptive Dehumidification System with ® Edge Pro Thermidistat Device W7220 economizer controller indicates a device fail error on ® EconoMi$er X (Factory-Installed Option) its LCD.
  • Page 25 Relay Digital Output Rating at 30 Vac (maximum power ECONOMIZER MODULE WIRING DETAILS — Use from Class 2 input only) — 1.5A run: Fig. 41 and Tables 7 and 8 to locate the wiring terminals for the Economizer module. 3.5A inrush at 0.45PF (200,000 cycles) or NOTE: The four terminal blocks are removable.
  • Page 26 Table 8 — Economizer Module - Right Hand Table 9 — HH57AC081 Sensor Wiring Terminal Blocks Terminations LABEL TYPE DESCRIPTION TERMINAL TYPE DESCRIPTION Top Right Terminal Blocks NUMBER LABEL AUX2 I 24 vac IN The first terminal is not used. S-BUS Communications S-BUS...
  • Page 27 • Press the (Enter) button to display the first item in the 10. Press the (Menu Up/Exit) button to return to the pre- currently displayed menu. vious menu. MENU STRUCTURE — Table 11 illustrates the complete hi- erarchy of menus and parameters for the EconoMi$er ®...
  • Page 28 Table 11 — 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 29 Table 11 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT ACT COUNT 1 to 65535 Displays number of times actuator has cycled. 1 cycles equals 180 deg. of actuator movement in any direction. ACTUATOR OK/Alarm (on Alarm Displays ERROR if voltage or torque is below actuator range.
  • Page 30 Table 11 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT INSTALL 01/01/10 Display order = MM/DD/YY Setting order = DD, MM, then YY. UNITS DEG F or C Sets economizer controller in degrees Fahrenheit or Celsius EQUIPMENT CONV Conventional or HP...
  • Page 31 Table 11 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT MAT T CAL 0.0°F ±2.5°F SUPPLY AIR TEMPERATURE CALIBRATION Allows for the operator to adjust for an out of calibration temperature sensor. OAS T CAL 0.0°F ±2.5°F OUTSIDE AIR TEMPERATURE CALIBRATION...
  • Page 32 Table 11 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT SHUTDOWN ACTIVE AUX2 IN is programmed for SHUTDOWN and 24 V has been applied to AUX2 IN terminal. DMP CAL RUNNING DAMPER CALIBRATION ROUTINE RUNNING If DCV Auto enable has been programmed, when the W7220 is complet- ing a calibration on the dampers, this alarm will display.
  • Page 33 Table 12 — Damper Minimum Position Settings and Readings on Checkout Menu DEMAND CONTROLLED VENTILATION FAN SPEED SETPOINTS CHECKOUT (CO2 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 34 Table 15 — 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 0v/Off 0v/Off MIN POS Closed NONE HIGH 24v/On 0v/Off MIN POS Closed HIGH 24v/On...
  • Page 35 Table 18 — 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 0v/Off 0v/Off VENTMIN Closed 24v/On 0v/Off VENTMIN Closed HIGH 24v/On 24v/On VENTMIN Closed...
  • Page 36 ECONOMIZING DUAL ENTHALPY AVAILABLE HIGH LIMIT NOT AVAILABLE SINGLE ENTHALPY P2 (T,RH) (T,RH) TEMPERATURE Fig. 45 — Single Enthalpy Curve Boundaries Table 21 — Single Enthalpy and Dual Enthalpy High Limit Curves POINT P1 POINT P2 ENTHALPY TEMP. DRY TEMP. ENTHALPY HUMIDITY HUMIDITY...

  • Page 37: Low Ambient Control (Factory Option)

    NOTE: Upon power up, the module waits 60 minutes before checking for alarms. This allows time for all the configured WARNING devices (e.g. sensors, actuator) to become operational. The Failure to follow this warning could result in personal exception is the SAT sensor which will alarm immediately. injury, property damage, or death.
  • Page 38 Fig. 46 — 48HC Control Box Component Locations with ComfortLink Controls...
  • Page 39 Fig. 47 — Typical ComfortLink Control Wiring Diagram (48HC*08/09 shown)
  • Page 40 Fig. 48 — Typical 48HC ComfortLink Control Power Wiring Diagram with Optional Humidi-MiZer System (208/230V, 460V - 3 Ph - 60 Hz shown)

  • Page 41: Premierlink™ Controller (Factory Option)

    CCN service access tools include System The PremierLink controller requires the use of a Carrier Pilot™, Touch Pilot™ and Service Tool. (Standard tier display electronic thermostat or a CCN connection for time broadcast tools Navigator™...
  • Page 42 Fig. 51 — Typical PremierLink™ Control Wiring Diagram...
  • Page 43 ® Fig. 52 — Typical PremierLink Control Wiring Diagram with Humidi-MiZer System Option...

  • Page 44: Supply Air Temperature (Sat) Sensor

    NOTE: Refer PremierLink Controller Installation, Start-up, Supply Air Temperature (SAT) Sensor — and Configuration Instructions for complete PremierLink con- FIOP-equipped 48HC unit, the unit is supplied with a supply- troller configuration, operating sequences and troubleshooting air temperature (SAT) sensor (33ZCSENSAT). This sensor is a information.
  • Page 45 Digital, 5VDC AUX OUT (Power Exhaust) (Output) Discrete 24VAC CCN — (BLK) Digital, 5VDC LEGEND — Carrier Comfort Network (communication bus) — Thermostat Fan — Indoor Air Quality (CO — Outdoor Air Quality (CO — Return Air Temperature — Relative Humidity —...
  • Page 46 SPACE SENSORS — The PremierLink controller is factory- shipped configured 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 con- troller. T-56 provides same space temperature signal plus it al- lows for adjustment of space temperature setpoints from the face of the sensor by the occupants.

  • Page 47: Economizer Controls

    SPACE THERMOSTAT THERMOSTAT 4-12 J4-10 0-10VDC J4-8 SIG COM 4-20mA J4-6 ALARM RELAY CONTACTS J4-4 H G 24 VAC 24 VDC THERMOSTAT 8 7 6 5 4 3 2 1 Fig. 58 — Space Thermostat Connections If the 48HC unit has an economizer system and free-cooling operation is required, a sensor representing Return Air Tem- perature must also be connected (field-supplied and installed).
  • Page 48 Installation The sensor must be mounted vertically on the wall. The Fig. 62 — Outdoor CO Sensor Connections Carrier logo should be orientated correctly when the sensor is SPACE RELATIVE HUMIDITY SENSOR OR HUMIDI- properly mounted. STAT CONNECTIONS Avoid corner locations. Allow at least 4 ft between the sen- sor and any corner.
  • Page 49 Filter Switch (NO, close on rising pressure (high drop)) TB1-7 Thermostat TB1-13 J4-4 Fig. 65 — PremierLink Controller Filter Switch Connection When the filter switch’s NO contact set closes as filter pres- Vin Gnd sure drop increases (indicating dirt-laden filters), the input sig- nal to the PremierLink controller causes the filter status point to read “DIRTY.”...

  • Page 50: Rtu Open Controller System

    2413 or 5463 included in the FIOP/accessory EconoMi$er2 package. American A22503 The RTU Open controller is an integrated component of the Carrier rooftop unit. Its internal application programming pro- Belden 8772 vides optimum performance and energy efficiency. RTU Open Columbia...
  • Page 51 Board Power (AO-1) 0-10VDC 4-20mA BO-1 BO-2 BO-3 BO-4 BO-5 VFD Output AO-2 BO-6 (2-10V) BO-6 BO-7 3-Volt (H) Humidimizer Lithium Battery BO-7 (Reversing Valve/High Speed Fan/Y3) BO-8 BO-8 (Power Exhaust) LonWorks Option Card Port Network Comm Example set for BACnet MS/TP and 76.8K baud (1, 2, and 4 ON)
  • Page 52 Fig. 71 — Typical RTU Open Controller Wiring Diagram...
  • Page 53 Fig. 72 — Typical RTU Open Controller Wiring Diagram with Humidi-MiZer ® System Option...
  • Page 54 “Run Enable” status. See Input/Output section for additional instruc- tions. The RTU Open controller requires the use of a Carrier space -in. hole in the flange or duct. Use two field-supplied, self- sensor. A standard thermostat cannot be used with the RTU drilling screws to secure the sensor probe in a horizontal orien- Open system.

  • Page 55: Field Connections

    SPACE TEMPERATURE (SPT) SENSORS — There are isolated power supply of 24 VAC. See Fig. 75 for internal con- two types of SPT sensors available from Carrier, resistive input nections at the T-59. Connect the SEN terminal (BLU) to the...
  • Page 56 Do not mount the IAQ sensor in drafty areas such as near ventilation air and interface with the ventilation damper in an supply ducts, open windows, fans, or over heat sources. Allow HVAC system. at least 3 ft (0.9 m) between the sensor and any corner. Avoid The OAQ sensor is packaged with an outdoor cover.

  • Page 57: Communication Wiring - Protocols

    smoke detector’s tripped status to the BAS building control. See Fig. 71 and 72, (RTU Open Controller wiring diagrams).  The Fire Shutdown Switch configuration, MENU Con-   Inputs input 5, identifies the normally open status of this input when there is no fire alarm. CONNECTING DISCRETE INPUTS —...

  • Page 58: Local Access

    SW3 Protocol Selection PROTOCOL Select BACnet MS/TP (Master) Unused Select Baud Baud Select Modbus (Slave) Unused Select Baud Baud N2 (Slave) Unused LonWorks Unused NOTE: DS = Dip Switch COMM BACnet MS/TP SW3 example shown OPTION SET TO Baud Rate Selections PORT SET TO MSTP 38.4k...

  • Page 59: Outdoor Air Enthalpy Control

    Access Port LOCAL ACCESS RNET PORT Connect to +12 DVC Rnet- computer’s Rnet+ CR2032 USB port Connect to UI-10 the Local UI-11 Access port USB Link Kit RTU Open Controller Fig. 84 — PC Running Field Assistant Table 29 — LEDs The LEDs on the RTU Open Controller show the status of certain functions If this LED is on...

  • Page 60: Smoke Detectors

    DIFFERENTIAL ENTHALPY CONTROL — Differential complete the unit and smoke detector configuration to meet enthalpy control is provided by sensing and comparing the out- project requirements. side air and return air enthalpy conditions. Install the outdoor Units equipped with factory-optional Return Air smoke de- air enthalpy control as described above.

  • Page 61: Step 12 - Adjust Factory-Installed Options

    Unit Without Economizer or Economizer 2 Position Damper 2 Position Damper Fig. 89 — EconoMi$er ® IV Wiring • Louvered hail guard Step 12 — Adjust Factory-Installed Options • Motormaster ® head pressure controls SMOKE DETECTORS — Smoke detector(s) will be con- •...

  • Page 62: Pre-Start And Start-Up

    TENSION FORCE IN BELT (LBS) Used Table 2 Fig. 90 — V-Belt Force Label © 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. 04-53480177-01 Printed in U.S.A.

  • Page 63: 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.
  • Page 64 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. 04-53480177-01 Printed in U.S.A.

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