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CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . . 19
Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . 19
Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . . 20
Step 5 - Field Fabricate Ductwork . . . . . . . . . . . . . 24
Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . . 24
Step 7 - Horizontal Duct Connection . . . . . . . . . . . 24
Tubing Installation . . . . . . . . . . . . . . . . . . . . . . . . . 24
Step 9 - Install Outside Air Hood . . . . . . . . . . . . . . 25
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Step 12 - Install Gas Piping. . . . . . . . . . . . . . . . . . . 26
Step 14 - Make Electrical Connections . . . . . . . . . 29
DISCONNECT OR HACR
VAV-RTU Open Controller. . . . . . . . . . . . . . . . . . . . . 35
Integrated Staging Control (ISC) Board . . . . . . . . . . 36
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480267-01
Single Package Rooftop Gas Heating/Electric Cooling Unit
with Multi-Zone VAV (Variable Air Volume) Operation
Installation Instructions
Printed in U.S.A.
Form 48LCB-14-26-02SI
WeatherExpert
with Puron
®
Smoke Detectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Step 15 - Install Accessories . . . . . . . . . . . . . . . . . 52
Pre-Start and Start-Up . . . . . . . . . . . . . . . . . . . . . . . 52
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.
WARNING
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in death, serious
personal injury and/or property damage.
Disconnect gas piping from unit when pressure testing at pres-
sure greater than 0.5 psig (3450 Pa). Pressures greater than
0.5 psig will cause gas valve damage resulting in hazardous
condition. If gas valve is subjected to pressure greater than
0.5 psig, it must be replaced before use. When pressure testing
field-supplied gas piping at pressures of 0.5 psig or less, a unit
connected to such piping must be isolated by closing the man-
ual gas valve(s).
Pg 1
9-19
®
48LC*B14-26
(R-410A) Refrigerant
Replaces: 48LCB-14-26-01SI
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Related Manuals for Carrier WeatherExpert 48LC B14 Series
Summary of Contents for Carrier WeatherExpert 48LC B14 Series
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Page 1: Table Of Contents
® WeatherExpert 48LC*B14-26 Single Package Rooftop Gas Heating/Electric Cooling Unit with Multi-Zone VAV (Variable Air Volume) Operation with Puron ® (R-410A) Refrigerant Installation Instructions • CONNECTING THE KEYPAD TO THE VFD CONTENTS • PROGRAM THE VFD FOR INDOOR FAN CONTROL SAFETY CONSIDERATIONS . -
Page 2: General
WARNING WARNING FIRE HAZARD ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury, Failure to follow this warning could cause personal injury or death, and/or property damage. death. Inlet pressure tap set screw must be tightened and -in. - Page 3 R = Cu/Cu – Al/Cu – Louvered Hail Guard S = Cu/Cu – Cu/Cu – Louvered Hail Guard NOTE: Not all possible options can be displayed above. Refer to other support material or your local Carrier Expert Fig. 1 — 48LC*B14-26 Model Number Nomenclature...
- Page 4 Fig. 2 — 48LC*B14 Vertical Airflow...
- Page 5 Fig. 3 — 48LC*B14 Horizontal Airflow...
- Page 6 Fig. 4 — 48LC*B14 Back View and Condensate Drain Location...
- Page 7 Fig. 5 — 48LC*B14 Corner Weights and Clearances...
- Page 8 Fig. 6 — 48LC*B14 Bottom View...
- Page 9 Fig. 7 — 48LC*B17-20 Vertical Airflow...
- Page 10 Fig. 8 — 48LC*B17-20 Horizontal Airflow...
- Page 11 Fig. 9 — 48LC*B17-20 Back View and Condensate Drain Location...
- Page 12 Fig. 10 — 48LC*B17-20 Corner Weights and Clearances...
- Page 13 Fig. 11 — 48LC*B17-20 Bottom View...
- Page 14 Fig. 12 — 48LC*B24-26 Vertical Airflow...
- Page 15 Fig. 13 — 48LC*B24-26 Horizontal Airflow...
- Page 16 Fig. 14 — 48LC*B24-26 Back View and Condensate Drain Location...
- Page 17 Fig. 15 — 48LC*B24-26 Corner Weights and Clearances...
- Page 18 Fig. 16 — 48LC*B24-26 Bottom View...
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Page 19: Installation
Table 2 — Operating Weights UNIT LB (KG) 48LC*B Base Unit 1853 (842.3) 2095 (952.3) 2201 (1000.7) 2347 (1067.0) 2492 (1132.6) Economizer 246 (112) 246 (112) 246 (112) 246 (112) 246 (112) Powered Outlet 35 (16) 35 (16) 35 (16) 35 (16) 35 (16) Curb... -
Page 20: Step 4 - Provide Unit Support
connections to the unit must be field installed after the unit is in- HOOD CARTON LOCATION stalled on the roof curb. (REAR ACCESS PANEL) CONTROL BOX ACCESS PANEL FILTER AND INDOOR COIL MAXIMUM ALLOWABLE ACCESS PANEL DIFFERENCE IN. (MM) INDOOR BLOWER ACCESS PANEL GAS HEAT 0.25 (6) - Page 21 Fig. 20 — 48LC*B14 Roof Curb Details...
- Page 22 Fig. 21 — 48LC*B17-20 Roof Curb Details...
- Page 23 Fig. 22 — 48LC*B24-26 Roof Curb Details...
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Page 24: Step 5 - Field Fabricate Ductwork
system flue assembly at least 48-in. (1220 mm) from an adjacent Step 5 — Field Fabricate Ductwork building or combustible material. Cabinet return-air static pressure (a negative condition) shall not After unit is in position, remove rigging skids and shipping exceed 0.5 in. -
Page 25: Step 9 - Install Outside Air Hood
connect on red wire from VAV-RTU Open Board J4 – Terminal 4 and wire from DPT “-” terminal to quick connect on black wire from VAV RTU-Open Board J4-Terminal 5 with -in. quick connects. Wire nuts may also be used. Proper installation of these components is required for accurate in- put to Analog Input 1 (static_press) on the VAV-RTU Open Con- trol Board. -
Page 26: Step 10 - Economizer - Horizontal Airflow Units
Step 10 — Economizer - Horizontal Airflow Units APPLY SEAL STRIP The barometric relief damper ships attached to the exterior re- TO THE BACK OF THIS FLANGE APPLY SEAL STRIP turn opening panel on the unit (see Fig. 30). Remove shipping TO THE BACK cover to access the barometric relief damper, rain angle, and APPLY SEAL STRIP... -
Page 27: Gas Supply Line
(610 m) and/or for use with liquefied petroleum (LP) fuel. See ac- cessory kit installation instructions regarding these accessories. NOTE: Furnace gas input rate on rating plate is for installation up to 2000 ft (610 m) above sea level. The input rating for altitudes above 2000 ft (610 m) must be derated by 4% for each 1000 ft (305 m) above sea level. -
Page 28: Factory-Option Thru-Base Connections
(1.8 m). For pipe sizes larger than -in., follow recommen- Install a gas supply line that runs to the unit heating section. Refer dations of national codes. to the NFPA 54/NFGC or equivalent code for gas pipe sizing data. Do not use a pipe smaller than the size specified. Size the gas sup- Apply joint compound (pipe dope) sparingly and only to ply line to allow for a maximum pressure drop of 0.5 in. -
Page 29: Step 14 - Make Electrical Connections
The unit has one -in. condensate drain connection on the end of FIELD POWER SUPPLY the condensate pan (see Fig. 36). See Fig. 4, 9, and 14 for the loca- If equipped with optional powered convenience outlet: the power tion of the condensate drain connection. source leads to the convenience outlet’s transformer primary are The piping for the condensate drain and external trap can be com- not factory connected. - Page 30 Fig. 40 — 48LC*B14-26 VAV-RTU Open Control Wiring Diagram...
- Page 31 Fig. 41 — 48LC*B14-26 Power Wiring Diagram...
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Page 32: Units Without Factory-Installed Non-Fused Disconnect Or Hacr
UNITS WITHOUT FACTORY-INSTALLED NON-FUSED DISCONNECT OR HACR When installing units, provide a disconnect switch per NEC (Na- 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. Do not cover unit informative plate if mounting the disconnect on the unit cabinet. -
Page 33: All Units
Such operation would invalidate any applicable A weatherproof while-in-use cover for the factory-installed conve- Carrier warranty. nience outlets is now required by UL standards. This cover cannot be factory-mounted due to its depth; it must be installed at unit in- stallation. -
Page 34: Hacr
Remove the blank cover plate at the convenience outlet; discard the blank cover. Loosen the two screws at the GFCI duplex outlet, until approxi- mately -in. (13 mm) under screw heads are exposed. Press the gasket over the screw heads. Slip the backing plate over the screw heads at the keyhole slots and align with the gasket;... -
Page 35: Factory-Option Thru-Base Connections
RUBBER GROMMET CORNER POST WIRE TIES Fig. 49 — HACR Caution Label FACTORY-OPTION THRU-BASE CONNECTIONS All units are equipped with the ability to bring utilities through the base. Gas is brought up through an embossed area located in the gas section behind the gas entrance post. -
Page 36: Integrated Staging Control (Isc) Board
Integrated Staging Control (ISC) Board Indoor Fan Power Phase Phase Auxilary Condensate Economizer “On” Status Board Plug Monitor Monitor Shutdown Overflow Relay Relay Remote Shutdown Control Smoke Shutdown Smoke Alarm Control Occupancy Low Ambient Outdoor Fan Status Code LEDs Control Compressors Low Pressure Switch... -
Page 37: Sequence Of Operation
General set to enable, a unique economizer minimum position will be cal- The Carrier Integrated Staging Control (ISC) is intended for use culated based on the output of the DCV calculation. Two user con- with the VAV-RTU Open controller. After initial power to the figurable values are provided;... - Page 38 Low Ambient Cooling Operation Down to 45°F (7°C) Heating In Low Ambient RTU conditions when the temperature is be- In the Heating Mode (W1 and G), the ISC board sends power to tween 55°F (13°C) and 45°F (7°C), the Low Ambient Switch W on the IGC board.
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Page 39: Variable Air Volume (Vav) With Variable Frequency
Variable Air Volume (VAV) with Variable Fre- quency Drive The Variable Air Volume (VAV) system utilizes a Variable Fre- quency Drive (VFD) to modulate supply fan speed using a PID and an analog input from a duct static pressure sensor. The supply fan will adjust to meet the configured static set point regardless of cooling stage. -
Page 40: Connecting The Keypad To The Vfd
Com. 1-20 Motor Power ALPHA NUMERIC [2] 0.12KW-0.16HP DISPLAY Warn. Setup 1 Alarm Status Quick Main MENU KEY Menu Menu Menu Com. Com. LED: Flashes when bus communications is communicating. NAVIGATION Green LED/On: Control selection is working. KEYS Yellow LED/Warn.: Indicates a warning. STATUS Flashing Red LED/Alarm: Indicates an alarm. -
Page 41: Program The Vfd For Indoor Fan Control
Male Connector - connect to VFD Front Panel Fig. 60 — Align Bottom of VFD Keypad with Opening in VFD Front Panel Female Connector - connect to back of VFD Remote Keypad Fig. 62 — VFD Remote Keypad Cable PROGRAM THE VFD FOR INDOOR FAN CONTROL IMPORTANT: 48LC*B14-26 units are programmed at the factory for variable indoor fan speeds. - Page 42 c. Press OK. The display changes to: 5—0* Digital I/O Mode 5—1* Digital Inputs Select language English d. Press ▼ (Down Arrow) once to highlight the bottom [0] English row and press OK. The display changes to: SETUP 1 Status Quick Main Menu...
- Page 43 f. Press OK and then use the ▲ and ▼ (Up and Down g. Press ▼ (Down Arrow) twice, the following display Arrow) keys to scroll to the proper motor horsepower. appears: Press OK again to set the selected hp. g.
- Page 44 c. Press OK, the following display appears: e. Press ▼ (Down Arrow) once, the following display appears: 3—0* Reference Limits 3—1* References 3-42 Ramp 1 Ramp Down Time 3.00s d. Press OK again, the following display appears: f. Press OK again to highlight the bottom row and use the ▲...
- Page 45 c. Press OK, the following display appears: 12. Setting Reset Mode and RFI Filter: a. Press the Back key until the following display 5—0* Digital I/O mode appears: 5—1* Digital Inputs 0—** Operation / Display d. Press ▼ (Down Arrow) once to move the highlight to 1—** Load and Motor the bottom row and then press OK.
- Page 46 (MUST-HOLD (Hz) SPEED (RPM) AMPS) Motor Motor Option Voltage 0–03 0–06 1–20 1–22 1–23 1–24 1–25 Carrier P/N Mfr P/N 208/230 HD58FE654 HK30WA371 131L9796 [102] [10] 1735 HD58FE654 HK30WA377 131L9864 [122] [10] 1735 HD58FE577 HK30WA383 131N0227 [132] [11] 1710 208/230 HD60FK658 HK30WA372 131L9797...
- Page 47 (Hz) SPEED (RPM) AMPS) Motor Motor Voltage 0–03 0–06 1–20 1–22 1–23 1–24 1–25 Option Carrier P/N Mfr P/N 208/230 HD58FE654 HK30WA371 131L9796 [102] [10] 1735 HD58FE654 HK30WA377 131L9864 [122] [10] 1735 HD58FE577 HK30WA383 131N0227 [132] [11] 1710 208/230 HD60FK657 HK30WA373 131L9798...
- Page 48 (MUST-HOLD (Hz) SPEED (RPM) AMPS) Motor Motor Voltage 0–03 0–06 1–20 1–22 1–23 1–24 1–25 Option Carrier P/N Mfr P/N 208/230 HD60FE656 HK30WA372 131L9797 [102] [11] 11.7 1750 HD60FE656 HK30WA378 131L9865 [122] [11] 1750 HD58FE577 HK30WA383 131N0227 [132] [11] 1710...
- Page 49 Table 12 — VFD Unit Parameters – 48LC*B Size 20 (cont) START MOTOR FLYING MIN SPEED FOR DELAY THERMAL PRESET REFERENCE START FUNCTION (Hz) (sec) PROTECTION Motor Voltage 1–71 1–73 1–82 1–90 3–10 [0] 3–10 [1] 3–10 [2] 3–10 [3] 3–10 [4] 3–10 [5] 3–10 [6] 3–10 [7] Option 208/230 52.57% 61.63%...
- Page 50 (MUST-HOLD (Hz) SPEED (RPM) AMPS) Motor Motor Option Voltage 0–03 0–06 1–20 1–22 1–23 1–24 1–25 Carrier P/N Mfr P/N 208/230 HD60FK657 HK30WA373 131L9798 [102] [14] 21.2 1760 HD60FK657 HK30WA380 131L9867 [122] [14] 1760 HD60FL576 HK30WA384 131N0229 [132] [14] 1745...
- Page 51 (MUST-HOLD (Hz) SPEED (RPM) AMPS) Motor Motor Option Voltage 0–03 0–06 1–20 1–22 1–23 1–24 1–25 Carrier P/N Mfr P/N 208/230 HD60FK657 HK30WA373 131L9798 [102] [14] 21.2 1760 HD60FK657 HK30WA380 131L9867 [122] [14] 1760 HD60FL576 HK30WA384 131N0229 [132] [14] 1745...
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Page 52: Smoke Detectors
Smoke Detectors Smoke detectors are available as factory-installed options on 48LC*B14-26 models. Smoke detectors may be specified for sup- ply air only, for return air without or with economizer, or in com- bination of supply air and return air. The unit is factory-configured for immediate smoke detector shutdown operation;... - Page 54 © 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. 04-53480267-01 Printed in U.S.A. Form 48LCB-14-26-02SI Pg 54 9-19 Replaces: 48LCB-14-26-01SI...
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Page 55: Start-Up Checklist
START-UP CHECKLIST (Remove and Store in 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 56 Economizer minimum vent and changeover settings to job requirements (if equipped) (Y/N) _____ Verify smoke detector unit shutdown by utilizing magnet test (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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