48/50E-4SB
48/50EJ,EK,EW,EY038, 044, 048
SINGLE-PACKAGE COOLING UNITS
VARIABLE VOLUME
CONSTANT VOLUME
FACTORY-INSTALLED OPTIONAL HEAT
GAS HEAT
ELECTRIC HEAT
— PERFORMANCE DATA
— CERTIFIED DIMENSION PRINT
— CERTIFIED ROOF CURB DIMENSION PRINT
R 1997 Carrier Corporation • Syracuse, New York 13221
Form 48/50E-4SB Supersedes 48/50E-2SB
Printed in U.S.A.
3-97
Catalog No. 514-856
Date:
48/50EJ,EK,EW,EY038,044,048
SINGLE-PACKAGE COOLING UNITS
FACTORY-INSTALLED OPTIONAL HEAT
GAS HEAT/ELECTRIC HEAT
Supersedes:
JOB NAME:
LOCATION:
BUYER:
BUYER P.O. #
UNIT NUMBER:
MODEL NUMBER:
48/50EJ,EK,EW,EY
Rev.:
-4SB
CARRIER #
PERFORMANCE DATA CERTIFIED BY:
DATE:
DESCRIPTION
ARI STANDARD
360
ALL 208/230
460 VOLT UNITS
The 48/50EJ,EK,EW,EY ‘‘E-SERIES’’ rooftops are Carrier’s new industry leading single piece
35-45 ton rooftop units, intended for large Commercial/Industrial retrofit/replacement and new construction projects. These units are specifically engineered to facilitate the replacement of earlier
Carrier rooftop models in this size range by eliminating any requirement to replace the current roof
curb.
Both dedicated downshot and side supply/return models are offered. Roof curb mounted, downshot supply/return models are designated 48/50EJ (constant volume CV), and 48/50EK (variable air
volume VAV). Dedicated side supply/return models are 48/50EW (CV) and 48/50EY (VAV).
All 48/50EJ,EK,EW,EY models feature the E-SERIES’s industry leading industrial grade cabinet
construction with fully hinged tool-less entry access panels, gear drive low leak economizer and
hood assembly, EERs up to 10.4 superior fan performance up to 3.59 of external static, dual independent refrigeration circuits with 06D or 06E semi-hermetic compressors and service valves,
upgradeable Direct Digital Controls, variable frequency drives on all VAV models and available
centrifugal fan power exhaust.
STANDARD UNIT FEATURES
Unit compatible with Carrier Comfort Network or stand-alone
operation.
Self-diagnostic run test confirms control and component operation
at unit commissioning.
Remote start/stop capability.
Supply air temperature reset. (VAV only).
Remote monitoring of alarms using CCN.
Large hinged access doors.
Standard one-year warranty.
Standard unit as factory assembled is listed by ETL and ETL, Canada.
Units are rated in accordance with ARI Standard 360.
115-volt and 24-volt control circuit.
Two-inch disposable-type return air filters.
Dual semi-hermetic Carrier compressors with service valves and
crankcase heaters.
Fixed blower drive.
Lifting lugs.
Dual electrically and mechanically independent refrigeration
circuits.
Circuit breaker protection for all power components.
Short-cycle compressor protection.
Sloped, aluminized steel condensate pan.
Stand-alone diagnostics.
Integrated economizer utilizing direct-coupled actuator and low
leak gear driven dampers.
Single point electrical service entry.
Prepainted, galvanized steel cabinet.
Anti-microbial, Tuff Skin Rx cleanable insulation.
Compressor protection includes high- and low-pressure cutouts.
Evaporator fan motor protected by circuit breakers.
Condenser fan motors are totally enclosed, fan cooled with internal protection.
Low outdoor temperature cooling to 35° F as standard.
VFD (Variable Frequency Drive) on Variable Volume models.
Two-stage cooling on Constant Volume units.
Up to 6 stages of unloading for capacity control.
Compatible with 37H and 45 Series PIC terminals to form a
Digital Air Volume System.
STANDARD HEATING FEATURES
Five-year non-prorated warranty on electric heater elements is standard when heater is factory installed.
Integrated Gas Unit Controller (IGC) with diagnostics.
Induced-draft combustion.
Two-stage gas valves with redundant 100% shutoff feature.
2
Direct spark gas ignition.
Aluminized steel tubular heat exchangers.
Five-year non-prorated warranty on heat exchanger.
Heat limit switches, flame roll-out switches, combustion air fan
switches and time relay interlocks.
CUT ALONG DOTTED LINE
CUT ALONG DOTTED LINE
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
PERFORMANCE DATA
Unit Operating Weight
lb
COOLING
lb
Curb Weight
HEATING
Gross Total Capacity
Btuh
Heating Capacity:
°F
Stage 1
Btuh
Gross Sensible Capacity
Btuh
Stage 2
Btuh
Compressor Power Input
kW
Heating Capacity Total
Btuh
@ Condenser Air Temperature
Indoor Entering Air db
°F
wb
External Static Pressure
Cfm
Indoor Fan Motor Size
°F
Stage 1
kW
in. wg
Hp
Stage 2
kW
Heating Capacity Total
kW
Hp
Exhaust Fan Motor Size
ELECTRICAL DATA
Power Supply to Unit
Volts
Minimum Circuit Amps
Phase
Hz
Maximum Fuse Amps
FIELD-INSTALLED ‘‘ELECTRONIC EXPANSION BOARD’’ FEATURES
Building Purge Mode — flush building interior with outdoor air to remove contaminants before occupancy
(CCN and Power Exhaust required).
Provides a discrete output with occupancy control for use as specified by the customer.
Smoke Control functions (Building Pressurization and Smoke Purge) are provided through software. Terminals
are provided to interface with field supplied smoke/fire panel (Power Exhaust required).
Enthalpy control can be provided using field-installed accessory enthalpy controls.
Economizers control field configurable to: maintain a minimum economizer set point position OR maintain the
minimum economizer position based on input from an IAQ sensor (field supplied 4-20 mA).
FACTORY-INSTALLED OPTIONS
FIELD-INSTALLED ACCESSORIES
M
M
M
M
Barometric Relief
Non-Modulating Centrifugal Fan Power Exhaust (CV)
Modulating Centrifugal Fan Power Exhaust (VAV)
Electric Heaters
M
M
M
M
Optional 4-Year Extended Compressor Warranty
Roof Curb with Full Perimeter Support
Condenser Coil Hail Guard
Compressor Suction Pressure Unloaders
M
Copper Tube/Copper Fin Condenser Coil
M
Motormastert III Head Pressure Control
M
M
M
Pre-Coated Aluminum Fin Condenser Coil
Alternate Horsepower Supply Fan Motors
Alternate Horsepower, High-Efficiency Supply Fan Motors
M
M
M
Electronic Timeclock for Stand Alone VAV Applications
Thermostat and Subbase
Non-Modulating to Modulating Power Exhaust
Conversion Kit
M
M
LP Gas Conversion Kit
Space Temperature Sensor
M
M
M
Space Temperature Sensor with Offset
Electronic Expansion Board
IAQ Sensor
M
M
Enthalpy Control
Differential Enthalpy Control
3
4
CERTIFIED DIMENSION PRINT
CUT ALONG DOTTED LINE
CUT ALONG DOTTED LINE
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
CERTIFIED DIMENSION PRINT
5
6
CERTIFIED DIMENSION PRINT
CUT ALONG DOTTED LINE
CUT ALONG DOTTED LINE
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
CERTIFIED DIMENSION PRINT
7
8
CERTIFIED ROOF CURB DIMENSION PRINT