Page 1: Table Of Contents
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.
Page 2 accessories when modifying this product. Refer to the individual instructions packaged with the kits or accessories WARNING when installing. Follow all safety codes. Wear safety glasses and work gloves. CARBON-MONOXIDE POISONING HAZARD Use quenching cloths for brazing operations and have a fire Failure to follow instructions could result in severe personal extinguisher available.
Page 3: General
WARNING WARNING FIRE HAZARD FIRE HAZARD Failure to follow this warning could result in personal inju- Failure to follow this warning could result in personal inju- ry, death, and/or property damage. ry, death, and/or property damage. Inlet pressure tap set screw must be tightened and -in.
Page 4 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 5 Fig. 2 — Unit Dimensional Drawing — 14 Size Unit...
Page 6 Fig. 2 — Unit Dimensional Drawing — 14 Size Unit (cont)
Page 7: 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 8: Pad-Mounted Installation
Install outdoor air hood Locate the carton containing the outside air hood parts; see Fig. 13 and 14. Do not remove carton until unit has been rigged Install condensate line trap and piping and located in final position. Make electrical connections Install other accessories Step 4 —...
Page 9 Fig. 4 — Roof Curb Details...
Page 10: Slab Mount (Horizontal Units Only)
Step 5 — Field Fabricate Ductwork NOTE: Cabinet return-air static pressure (a negative condition) shall not exceed 0.35 in. wg (87 Pa) with economizer or 0.45 in. wg (112 Pa) without economizer. For vertical ducted applications, secure all ducts to roof curb and building structure.
Page 11: Positioning On Curb
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 48HC**14 2215 1009 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 12: Step 8 - Install Outside Air Hood
side duct opening covers (see Fig. 9) and remove covers. Use SCREWS the screws to install the covers on vertical duct openings with the insulation-side down. The panels must be inserted into the notches on the basepan to properly seal. The notches are cov- ered by the tape used to secure the insulation to the basepan and are not easily seen.
Page 13: Two Position Damper Hood Removal And • Economizer Hood And Two-Position Hood
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 discarded. Save the aluminum filter for use in the power exhaust hood assembly.
Page 14: Step 9 - Install Flue Hood
PANEL INDOOR COIL ACCESS PANEL SCREW LEFT HOOD SIDE CONTROL BOX ACCESS PANEL FLUE HOOD HOOD DIVIDER Fig. 16 — Economizer Hood Construction Fig. 18 — Flue Hood Details Step 10 — Install Gas Piping Installation of the gas piping must be accordance with local building codes and with applicable national codes.
Page 15: Factory Option Thru-Base Connections (Gas Connection)
Manifold pressure for liquid propane (LP) fuel use must be ad- FACTORY OPTION THRU-BASE CONNECTIONS (GAS justed to specified range. Follow instructions in the accessory CONNECTION) kit to make initial readjustment. This service connection kit consists of a -in. NPT gas adapt- er fitting (stainless steel), a -in.
Page 16 9” (229mm) min CONNECTOR PLATE ASSEMBLY Thru-Curb Adapter Union Unit Base Rail GASKET Shut Off Valve Drip Fig. 21 — Completing Installation of Thru-the-Base Option Fig. 23 — Gas Piping 9” (229mm) min Burner Access Panel Union Thru-Curb Adapter -in NPT THRU-BASE SUPPORT STREET...
Page 17: Step 11 - Install External Condensate Trap And Line
When installing the gas supply line, observe local codes per- taining to gas pipe installations. Refer to the NFPA 54/ANSI Z223.1 NFGC latest edition (in Canada, CAN/CSA B149.1). In the absence of local building codes, adhere to the following pertinent recommendations: Avoid low spots in long runs of pipe.
Page 18: Step 12 - Make Electrical Connections
MINIMUM PITCH 1˝ (25 mm) PER BASE RAIL 10´ (3 m) OF LINE 3˝ (76 mm) OPEN VENT TO ROOF SEE NOTE DRAIN ROOF CURB DRAIN PLUG NOTE: Trap should be deep enough to offset maximum unit static difference. A 4-in. (102 mm) trap is recommended. Fig.
Page 19: All Units
ELECTRIC DISCONNECT SWITCH COPPER WIRE ONLY ALUMINUM WIRE Fig. 33 — Disconnect Switch and Unit ALL UNITS All field wiring must comply with NEC and all local requirements. Size wire based on MCA (Minimum Circuit Amps) on the unit informative plate. See Fig. 34 and the unit label diagram for Fig.
Page 20: Units Without Factory-Installed Non
Operation on improper line voltage or excessive phase im- balance constitutes abuse and may cause damage to electri- cal components. Such operation would invalidate any ap- plicable Carrier warranty. NOTE: Check all factory and field electrical connections for tightness. UNITS WITHOUT FACTORY-INSTALLED NON-FUSED...
Page 21: Convenience Outlets
Install the handle on to the painted cover horizontally with the red arrow pointing to the left. Secure the handle to the painted cover with (2) screws and lock washers supplied. 10. Engaging the shaft into the handle socket, re-install (3) hex screws on the HACR circuit breaker enclosure.
Page 22 NOTICE/AVIS Pwd-CO Fuse Convenience Outlet Utilization Switch Maximum Intermittent Use 15 - Amps Maximum Continuous Use 8 - Amps Observe a 50% limit on the circuit Loading above 8 - Amps Utilisation de la prise utilitaire Usage intermittent maximum 15 - Amps Usage continu maximum 8 - Amps Observez une limite de 50% sur le circuit Chargement au-dessus de 8 - Amps...
Page 23: Factory Option Thru-Base Connections (Electrical Connections)
Installing Weatherproof Cover A weatherproof while-in-use cover for the factory-installed convenience outlets is now required by UL standards. This cover cannot be factory-mounted due its depth; it must be in- stalled at unit installation. For shipment, the convenience outlet is covered with a blank cover plate. The weatherproof cover kit is shipped in the unit’s control box.
Page 24: Units Without Thru-Base Connections
PremierLink™ controller (available as factory-installed option See Fig. 47. or as field-installed accessory, for use on a Carrier Comfort NOTE: If thru-the-bottom connections accessory is used, refer to Network ®...
Page 25 Fig. 48 — 48HC*14 Controls Wiring Diagram (208/230-v, 460-v, 575-v)
Page 26 Fig. 49 — 48HC*14 Power Wiring Diagram (208/230-v, 460-v)
Page 27 Fig. 50 — 48HC*14 Power Wiring Diagram (575-v)
Page 28: Humidi-Mizer® System Control Connections
System Control Connections the LTLO switch with field-supplied wire nuts. Refer to the HUMIDI-MIZER — SPACE RH CONTROLLER installation instructions included with the Carrier Edge Pro NOTE: The Humidi-MiZer system is a factory-installed option. Thermidistat device for more information. The Humidi-MiZer dehumidification system requires a field- supplied and installed space relative humidity control device.
Page 29 Fig. 53 — Typical Humidi-MiZer Adaptive Dehumidification System Humidistat Wiring...
Page 30: Economi$Er X (Factory Option)
Edge Programable Thermostat Unit CTB THERMOSTAT O/W2/B SRTN Humidi-MiZer™ FIOP *Connection not required. Fig. 54 — Typical Rooftop Unit with Humidi-MiZer ® Adaptive Dehumidification System with Edge ® Thermidistat Device SYSTEM COMPONENTS ® EconoMi$er X (Factory Option) The EconoMi$er X system is an expandable economizer con- The EconoMi$er X system includes an economizer module, trol system, which includes a W7220 economizer module (con- 20k mixed air sensor, damper actuator, and either a 20k out-...
Page 31: Inputs
• Nominal Power Consumption (at 24 vac, 60 Hz) — ECONOMIZER MODULE WIRING DETAILS 11.5 VA without sensors or actuators Use Fig. 56 and Tables 8 and 9 to locate the wiring terminals • Relay Digital Output Rating at 30 vac (maximum power for the Economizer module.
Page 32: Interface Overview
Table 9 — Economizer Module Table 10 — HH57AC081 Sensor Wiring Terminations (Right Hand 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 33: Setup And Configuration
To use the keypad when working with menus: Press the (Enter) button to accept the displayed value and store it in nonvolatile RAM. “CHANGE STORED” • Press the ▲ (Up arrow) button to move to the previous displays. menu. Press the (Enter) button to return to the current menu •...
Page 34 Table 12 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † SECOND STAGE COOLING DEMAND (Y2–IN) Y2–I signal from space thermostat or unitary controller for COOL Y2—IN ON/OFF second stage cooling. ON = 24 vac on terminal Y2–I OFF = 0 vac on terminal Y2–I SECOND STAGE COOLING RELAY OUTPUT...
Page 35 Table 12 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † 38°F to 70°F SUPPLY AIR SETPOINT (3°C to 21°C); MAT SET 53°F (12°C) The economizer will modulate the OA damper to maintain the increment by mixed air temperature at the set point 1 degree...
Page 36 Table 12 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † In CONV mode: SD = Enables configuration of shutdown (default); Shutdown (SD) W = Informs controller that system is in heating mode. Heat (W1) NOTE: If using 2-speed fan mode, you must program CONV AUX2 IN...
Page 37 Table 12 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † RETURN AIR HUMIDITY CALIBRATION RA H CAL 0% RH ±10% RH Allows for operator to adjust for an out of calibration humidity sensor.
Page 38 Table 12 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † ACTUATOR VOLTAGE HIGH ACT OVER V Voltage received by actuator is below expected range. ALARMS (cont) ACTUATOR STALLED ACT STALLED Actuator stopped before achieving commanded position.
Page 39 Table 15 — Dry Bulb Operation with 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 Closed VENTMIN High 24-v/On 0-v/Off Closed VENTMIN High 24-v/On...
Page 40 Table 18 — Dry Bulb Operation without DCV (CO Sensor) — 2 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I FAN SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED VENTILATION (DCV) ECONOMIZE 0-v/Off 0-v/Off MIN POS L Closed NONE 24-v/On 0-v/Off MIN POS L Closed High...
Page 41: Enthalpy Settings
Table 21 — Enthalpy 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 0v/Off...
Page 42: Checkout
ECONOMIZING DUAL ENTHALPY AVAILABLE HIGH LIMIT NOT AVAILABLE SINGLE ENTHALPY P2 (T,RH) (T,RH) TEMPERATURE Fig. 60 — Single Enthalpy Curve Boundaries Table 23 — Single Enthalpy and Dual Enthalpy High Limit Curves POINT P1 POINT P2 ENTHALPY TEMP. DRY TEMP. ENTHALPY HUMIDITY HUMIDITY...
Page 43: Low Ambient Control (Factory Option)
Clearing Alarms Low Ambient Control (Factory Option) Once the alarm has been identified and the cause has been re- If the unit comes with Electro-Mechanical (EM) control, then moved (e.g. replaced faulty sensor) the alarm can be cleared no adjustment is necessary. from the display.
Page 44 Fig. 62 — 48HC14 ComfortLink Control Wiring Diagram...
Page 45 Fig. 63 — 48HC14 ComfortLink Power Wiring Diagram...
Page 46 Fig. 64 — 48HC14 ComfortLink with Humidi-MiZer Power Wiring Diagram...
Page 47: Premierlink™ Controller (Factory Option)
Screw the sensor and detector plate into its operating posi- PremierLink™ Controller (Factory Option) tion using screws from Step 1. See Fig. 66, Step 3. For details on operating 48HC*14 units equipped with the fac- Connect the flexible tube on the sampling inlet to the sam- tory-installed PremierLink controller option, refer to the Pre- pling tube on the basepan.
Page 48: Step 13 - Adjust Factory-Installed Options
Unit Without Economizer or Economizer 2 Position Damper 2 Position Damper ® Fig. 67 — EconoMi$er IV Wiring • Head pressure control Step 13 — Adjust Factory-Installed Options • Programmable setback thermostat SMOKE DETECTORS • Electrical/Mechanical thermostat and subbase Smoke detector(s) will be connected at the Controls Connec- •...
Page 49: Belt Tension Method
the blower shaft and motor shaft are parallel to each other (pulleys BELT TENSION METHOD aligned). Tighten all bolts securely when finished. Requires belt tension gage that measures tension in belt in units of lbs force. BLOWER PULLEY V-BELT MOTOR PULLEY MOTOR BELT DEFLECTION FORCE (LBS)
Page 50 © Carrier Corporation 2019 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480222-01 Printed in U.S.A. Form 48HC-14-04SI Pg 50 2-19 Replaces: 48HC-14-03SI...
Page 51: Start-Up Checklist
START-UP CHECKLIST (Remove and use for job file) NOTE: To avoid injury to personnel and damage to equipment or prop- erty 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 Instructions.
Page 52  10. RESTORE SETPOINTS FOR THERMOSTAT AND HUMIDISTAT REPEAT PROCESS FOR 2 COMPRESSOR SYSTEMS © Carrier Corporation 2019 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480222-01 Printed in U.S.A.

This manual is also suitable for:

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Carrier WeatherMaster 48HC14 Installation Instructions Manual

Safety Considerations

General

Rated Indoor Airflow (Cfm)

Installation

Jobsite Survey

Step 1 - Plan for Unit Location

Step 2 - Plan for Sequence of Unit Installation

Step 3 - Inspect Unit

Step 4 - Provide Unit Support

Step 5 - Field Fabricate Ductwork

Step 6 - Rig and Place Unit

Step 7 - Convert to Horizontal and Connect Ductwork (When Required)

Step 8 - Install Outside Air Hood

Step 9 - Install Flue Hood

Step 10 - Install Gas Piping

Step 11 - Install External Condensate Trap and Line

Step 12 - Make Electrical Connections

Wiring Diagrams

Humidi-Mizer® System Control Connections

Economi$Er X (Factory Option)

Low Ambient Control (Factory Option)

Staged Air Volume (SAV™) with Variable Frequency Drive (Factory Option)

Comfortlink Controls (Factory Option)

Premierlink™ Controller (Factory Option)

RTU Open Controller System

Smoke Detectors

Step 13 - Adjust Factory-Installed Options

Step 14 - Install Accessories

Step 15 - Check Belt Tension

Pre-Start and Start-Up

Start-Up Checklist

Quick Links

SAFETY CONSIDERATIONS

Related Manuals for Carrier WeatherMaster 48HC14

Summary of Contents for Carrier WeatherMaster 48HC14

This manual is also suitable for:

Table of Contents