Carrier SINGLE PACKAGE ROOFTOP UNITS ELECTRIC COOLING/GAS HEATING 48EJ Installation And Service Instructions Manual

Single package rooftop units electric cooling/gas heating

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Installation, start-up and service instructions manual (119 pages)

User manual (32 pages)

Table Of Contents

Table of Contents

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CONTENTS

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

Step 1 — Provide Unit Support . . . . . . . . . . . . . . . 1

• ROOF CURB

• ALTERNATE UNIT SUPPORT

Step 2 — Rig and Place Unit . . . . . . . . . . . . . . . . . . 2

• POSITIONING

• ROOF MOUNT

Step 3 — Field Fabricate Ductwork . . . . . . . . . . . . 2

Step 4 — Install Flue Hood . . . . . . . . . . . . . . . . . . 12

Step 5 — Trap Condensate Drain . . . . . . . . . . . . 13

Step 6 — Install Gas Piping . . . . . . . . . . . . . . . . . . 13

Step 7 — Controls Options . . . . . . . . . . . . . . . . . . 13

• CONSTANT VOLUME APPLICATIONS

• VARIABLE AIR VOLUME (VAV) APPLICATIONS

Step 8 — Make Electrical Connections . . . . . . . 16

• POWER WIRING

• FIELD POWER SUPPLY

• FIELD CONTROL WIRING

Step 9 — Make Outdoor-Air Inlet

Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

• ECONOMIZER

• ECONOMIZER SETTINGS

Step 10 — Position Power Exhaust/Barometric

Relief Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Step 11 — Install All Accessories . . . . . . . . . . . . 30

Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31-44

Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44-55

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . 56-61

Start-Up Checklist . . . . . . . . . . . . . . . . CL-1,CL-2

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment

can be hazardous due to system pressure and electrical com-

ponents. Only trained and qualiﬁed service personnel should

install, repair, or service air-conditioning equipment.

Untrained personnel can perform the 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, ob-

serve precautions in the literature, tags and labels attached

to the unit, and other safety precautions that may apply.

Follow all safety codes. Wear safety glasses and work gloves.

Use quenching cloth for unbrazing operations. Have ﬁre ex-

tinguishers available for all brazing operations.

Before performing service or maintenance operations on

unit, turn off main power switch to unit. Electrical shock

could cause personal injury.

Manufacturer reserves the right to discontinue, or change at any time, speciﬁcations or designs without notice and without incurring obligations.

Book 1

PC 111

Tab

Installation, Start-Up and

Service Instructions

Page

Catalog No. 564-962

Printed in U.S.A.

48EJ,EK,EW,EY024-048

Single Package Rooftop Units

Electric Cooling/Gas Heating

1. Improper installation, adjustment, alteration, serv-

ice, or maintenance can cause property damage, per-

sonal injury, or loss of life. Refer to the User's

Information Manual provided with this unit for more

details.

2. Do not store or use gasoline or other ﬂammable va-

pors and liquids in the vicinity of this or any other

appliance.

What to do if you smell gas:

1. DO NOT try to light any appliance.

2. DO NOT touch any electrical switch, or use any phone

in your building.

3. IMMEDIATELY call your gas supplier from a neigh-

bor's phone. Follow the gas supplier's instructions.

4. If you cannot reach your gas supplier, call the ﬁre

department.

Disconnect gas piping from unit when pressure testing

at pressure greater than 0.5 psig. Pressures greater than

0.5 psig will cause gas valve damage resulting in haz-

ardous 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 manual gas valve(s).

INSTALLATION

Step 1 — Provide Unit Support

1. All panels must be in place when rigging.

2. Unit is not designed for handling by fork truck.

Roof Curb — Assemble or install accessory roof curb in

accordance with instructions shipped with this accessory. See

Fig. 1 and 2. Install insulation, cant strips, rooﬁng, and counter

ﬂashing as shown. Ductwork can be installed to roof curb

before unit is set in place. Curb should be level. This is nec-

essary to permit unit drain to function properly. Unit level-

ing tolerance is shown in Fig. 1 and 2. Refer to Accessory

Roof Curb Installation Instructions for additional informa-

tion as required. When accessory roof curb is used, unit may

be installed on class A, B, or C roof covering material.

IMPORTANT: The gasketing of the unit to the roof

curb is critical for a watertight seal. Install gasket with

the roof curb as shown in Fig. 1 and 2. Improperly

applied gasket can also result in air leaks and poor unit

performance.

Form 48E-5SI

Pg 1

8-97

Replaces: 48E-3SI

Table of Contents

Summary of Contents for Carrier SINGLE PACKAGE ROOFTOP UNITS ELECTRIC COOLING/GAS HEATING 48EJ

Page 1 Installation, Start-Up and Service Instructions CONTENTS SAFETY CONSIDERATIONS ....1 INSTALLATION ......1-31 Step 1 —...
Page 2: Step 2 — Rig And Place Unit
ALTERNATE UNIT SUPPORT — When the preferred curb or slab mount cannot be used, support unit with sleepers on perimeter, using unit curb support area. If sleepers cannot be used, support long sides of unit (refer to Fig. 3-6) with a minimum number of 4-in.
Page 3 NOTES: 1. All roof curb parts are to be 16 ga galvanized steel. 2. Dimensions are in inches. 3. To prevent standing water in the drain pan of the indoor section and the heat exchangers, unit can only be pitched as shown.
Page 4 NOTES: 1. All roof curb parts are to be 16 ga galvanized steel. 2. Dimensions are in inches. 3. To prevent standing water in the drain pan of the indoor section and the heat exchangers, unit can only be pitched as shown.
Page 5 Filter Access Side: 10 -0 (For Removal of Evaporator Coil) 4. For smaller service and operational clear- ances, contact Carrier Application Engineer- ing department. 5. Bottom ducts designed to be attached to ac- cessory roof curb. If unit is mounted on dun-...
Page 6 Filter Access Side: 10 -0 (For Removal of Evaporator Coil) 4. For smaller service and operational clearances, contact Carrier Application Engineering department. 5. Bottom ducts designed to be attached to accessory roof curb. If unit is mounted on dunnage, it is recommended the ducts be supported by cross braces as done on accessory roof curb.
Page 7 Economizer Side: 6 -0 Gas Heat Side: 4 -0 Filter Access Side: 10 -0 (For Removal of Evaporator Coil) 4. For smaller service and operational clearances, contact Carrier Application Engineering department. 5. Dimensions are in inches. 6. For side-supply/return applications, a single return and supply ductwork connection is recommended for covering both return and both supply openings.
Page 8 Economizer Side: 6 -0 Gas Heat Side: 4 -0 Filter Access Side: 10 -0 (For Removal of Evaporator Coil) 4. For smaller service and operational clearances, contact Carrier Application Engineering department. 5. Dimensions are in inches. 6. For side-supply/return applications, a single return and supply duct- work connection is recommended for covering both return and both supply openings.
Page 9 WEIGHT UNIT 48EJ,EK,EW,EYD024 4176 1894 48EJ,EWE024 4256 1930 48EJ,EK,EW,EYD028 48EJ,EK,EW,EYD030 4262 1933 87.68 48EJ,EK,EW,EYD034 48EJ,EWE028 48EJ,EWE030 4342 1969 48EJ,EWE034 48EJ,EK,EW,EYD038 4442 2015 48EJ,EWE038 4602 2087 48EJ,EK,EW,EYD044 4668 2117 48EJ,EWE044 4828 2190 48EJ,EK,EW,EYD048 4955 2248 48EJ,EWE048 5115 2320 NOTICE TO RIGGERS: ALL PANELS MUST BE IN PLACE WHEN RIGGING.
Page 10 UNIT 48EJ,EK,EW,EY NOMINAL CAPACITY (tons) OPERATING WEIGHT (lb)* Unit Al/Al† (Lo Heat/Hi Heat) 4176/4256 Al/Cu† (Lo Heat/Hi Heat) 4396/4476 Roof Curb (14-in. curb) COMPRESSOR Type Ckt 1 Ckt 2 Number of Refrigerant Circuits Oil (oz) (Ckt 1, Ckt 2) REFRIGERANT TYPE Operating Charge (lb-oz) Circuit 1** Circuit 2...
Page 11 UNIT 48EJ,EK,EW,EY NOMINAL CAPACITY (tons) OPERATING WEIGHT (lb)* Unit Al/Al† (Lo Heat/Hi Heat) Al/Cu† (Lo Heat/Hi Heat) Roof Curb (14-in. curb) COMPRESSOR Type Ckt 1 Ckt 2 Number of Refrigerant Circuits Oil (oz) (Ckt 1, Ckt 2) REFRIGERANT TYPE Operating Charge (lb-oz) Circuit 1** Circuit 2 CONDENSER COIL...
Page 12: Step 4 — Install Flue Hood
Table 2 — Evaporator Fan Motor Data (Units with Starting Serial Numbers 4197 and Later) MOTOR UNIT MOTOR SHAFT SHAFT MOTOR SIZE DIA. SPEED SHEAVE (in.) (rpm) 1.12 BK55 1.38 2BK50 1.62 1096 2B5V56 1.38 BK60H 1.38 1B5V60 1.62 1106 2B5V54 1.38 2BK50...
Page 13: Step 5 — Trap Condensate Drain
CV (constant volume) or VAV (variable air volume) operation; stand-alone unit with ﬁeld-supplied sensors in- stalled (CV or VAV); as a system via Carrier Comfort Sys- tem (TEMP or VVT ); optional electronic expansion board installed (CV or VAV); linked to the Carrier Comfort Network;...
Page 14 • control of smoke control modes including evacuation, smoke purge, pressurization, and ﬁre shutdown (modulating power exhaust required) When the unit is connected to the CCN (Carrier Comfort Network), the following expansion board features can be utilized: • perform Demand Limit functions based on CCN loadshed commands or the state of the discrete input •...
Page 15 Features with Sensor Control of Unit (Network Applica- tions) — The base control board provides, as standard, a con- nection for use with a Carrier VVT system and can also be integrated into a Carrier Comfort Network. When the unit is accessed via a PC equipped with Com- fortWorks™, Building Supervisor, or Service Tool software,...
Page 16 • ﬁre unit shutdown • ﬁre pressurization • ﬁre evacuation • ﬁre smoke purge When the unit is connected to the CCN (Carrier Comfort Network), the following expansion board features can be utilized: • CCN IAQ (indoor air quality) participation •...
Page 17 LEGEND CCN — Carrier Comfort Network N.O. — Normally Open COM — Common — Diode — Light-Emitting Diode N.C. — Normally Closed *Where X is the unit control software version number. — Relay — Serial Input/Output — Switch — Terminal...
Page 18 COMPRESSOR VOLTAGE UNIT NOMNAL RANGE No. 1 SIZE VOLTAGE Min Max RLA LRA RLA LRA Qty Hp FLA (3 Ph 60 Hz) 208/230 39.1 19.9 16.0 208/230 39.1 19.9 16.0 208/230 57.1 25.6 20.5 Table 4 — Electrical Data No. 2 (ea) Hp FLA FLA LRA 5 16.7/ 15.2...
Page 19 COMPRESSOR VOLTAGE UNIT NOMINAL RANGE No. 1 SIZE VOLTAGE Min Max RLA LRA RLA LRA Qty Hp FLA (3 Ph 60 Hz) 208/230 57.1 25.6 20.5 208/230 57.1 25.6 20.5 LEGEND — Full Load Amps HACR — Heating, Air Conditioning and Refrigeration —...
Page 20 COMPRESSOR VOLTAGE UNIT NOMINAL RANGE No. 1 SIZE VOLTAGE Min Max RLA LRA RLA LRA Qty Hp FLA (3 Ph 60 Hz) 208/230 69.2 28.8 26.7 208/230 82.1 42.3 34.6 LEGEND — Full Load Amps HACR — Heating, Air Conditioning and Refrigeration —...
Page 21 CV (constant volume) units only. Control box diagrams are shown in Fig. 18 and 19. Thermostat Wiring (CV Only) — Install a Carrier-approved accessory thermostat assembly (per current price pages) ac- cording to the installation instructions included with the ac- cessory or these instructions.
Page 22 — Contactor/Compressor CB — Circuit Breaker DIP — Dual In-Line Package — Fuse HR — Heater Relay Fig. 19 — Control Box Diagram (Sizes 038-048) Fig. 20 — Field Control Thermostat Wiring LEGEND — Indoor Fan — Outdoor Fan — Power Exhaust Controller —...
Page 23 1. Refer to CCN literature to change the default values, if needed. Carrier Comfort Network Interface — The 48E units can be connected to the CCN. The communication bus wiring is sup- plied and installed in the ﬁeld. Wiring consists of shielded, 3-conductor cable with drain wire.
Page 24: Adjustments
IMPORTANT: When connecting the CCN communi- cation bus to a system element, use a color coding sys- tem for the entire network to simplify installation and checkout. See Table 6. Table 6 — Color Code Recommendations SIGNAL CCN BUS CONDUCTOR TYPE INSULATION COLOR Positive (+)
Page 25 FLANGE BLACK SEAL STRIP Fig. 23 — Adding Seal Strip to Top of Hood Sides NOTE: Left side economizer hood has mounting angle without tabs and ﬁlter track assembled end on the opposite side. Fig. 24 — Economizer Hood Assembly (Right Side Economizer Hood Shown) HOOD SIDE MOUNTING...
Page 26 HOOD Fig. 28 — Adding Foam Strip to Hood Side BLOCKOFF BAFFLE GRAY FOAM STRIP Fig. 29 — Adding Foam Strip to Blockoff Baffle Fig. 30 — Mounting Angle (Without Tabs) Attached to Filter Track Assembly The outdoor-air damper closes. The control allows 90 sec- onds for the damper to close in case it is in the full open HOOD SIDE position.
Page 27 Fig. 31 — Mounting Angle (With Tabs) Attached to Filter Track Assembly BLACK SEAL STRIP (CENTERED) FILTER COVER Fig. 32 — Attaching Seal Strip to Filter Cover Differential Enthalpy Sensor Installation — To install the con- trol, perform the following procedure: 1.
Page 28 NOTE: Switches shown in high enthalpy state. Terminals 2 and 3 close on enthalpy decrease. Fig. 34 — Wiring Connections for Solid-State Enthalpy Control (HH57AC077) NOTE: Partitions shown indicate both side supply (EW/EY) and ver- tical supply (EJ/EK) units. CONTROL POINT CONTROL (APPROX.
Page 29 Step 10 — Position Power Exhaust/Barometric Relief Damper Hood — All electrical connections have been made and adjusted at the factory. The power exhaust blowers and barometric relief dampers are shipped as- sembled and tilted back into the unit for shipping. Brackets and extra screws are shipped in shrink wrap around the damp- ers.
Page 30: Step 11 — Install All Accessories
Step 11 — Install All Accessories — factory-installed options have been adjusted, install all ﬁeld- installed accessories. Refer to the accessory installation in- structions included with each accessory. MOTORMASTER III INSTALLATION Install Field-Fabricated Wind Baffles — Wind baffles must be ﬁeld-fabricated for all units to ensure proper cooling cycle operation at low-ambient temperatures.
Page 31: Installation
Fig. 40A — Motormaster III Sensor Location (Sizes 024-034) Fig. 40B — Motormaster III Sensor Location (Sizes 038 and 044) START-UP Use the following information and Start-Up Checklist on page CL-1 to check out unit PRIOR to start-up. Unit Preparation — Check that unit has been installed in accordance with these installation instructions and appli- cable codes.
Page 32 IMPORTANT: The Carrier factory default values for the VFD may be different than the default val- ues of the manufacturer. Refer to the Carrier lit- erature when checking default values. The following default values have been changed from the manu- facturer settings to more closely match the VFD operation to a Carrier VAV unit.
Page 33 At the upper right corner of the board is a set of 5 pins and jumper, which determines the time constant for the control. The time constant is the delay in response built into the con- trols. The jumper should be on the middle or bottom two pins, for the maximum time constant.
Page 34 VAV — Space Sensor Installed OPEN CV — CCN or Sensors Used VAV — No Space Sensor CLOSED CV — Thermostat LEGEND CCN — Carrier Comfort Network — Constant Volume VAV — Variable Air Volume UNIT 48EJ,EW Closed Closed 48EK,EY Open Closed Table 9 —...
Page 35 Table 12 — Fan Performance, 48EJ/EK024-034 — Vertical Discharge Units (For EW/EY units, reduce net available external static pressure by 0.3 in. wg) AIRFLOW (Cfm) 4,000 0.83 1.17 5,000 1.25 1.61 6,000 1.79 2.19 7,000 2.48 2.91 8,000 3.33 3.78 8,250 3.57 4.02...
Page 36 Table 13 — Fan Performance, 48EJ,EK038,044 — Vertical Discharge Units (For EW/EY units, reduce net available external static pressure by 0.5 in. wg) AIRFLOW (Cfm) 7,000 1.70 2.40 8,000 2.36 3.09 9,000 3.11 3.97 10,000 4.00 5.01 11,000 5.04 6.22 12,000 6.24 7.61...
Page 37 Table 14 — Fan Performance, 48EJ,EK048 — Vertical Discharge Units (For EW/EY units, reduce net available external static pressure by 0.5 in. wg) AIRFLOW (Cfm) 9,000 3.20 4.00 10,000 4.10 5.10 11,000 5.10 6.30 12,000 6.30 7.70 13,000 7.71 9.31 14,000 9.28 11.11...
Page 38 BHP — Brake Horsepower NOTE: Extensive motor and electrical testing on the Carrier units has ensured that the full horsepower range of the motor can be utilized with conﬁdence. Using your fan motors up to the horsepower ratings shown on the Motor Limitations table will not result in nuisance tripping or premature motor failure.
Page 39 MINIMUM HEATING UNIT AIRFLOW 48EJ,EK,EW,EY (Low Heat) 5730 5730 5730 5730 7360 7360 7360 LEGEND — Constant Volume VAV — Variable Air Volume Return-Air Filters — Check that correct ﬁlters are in- stalled in ﬁlter tracks (see Table 1). Do not operate unit with- out return-air ﬁlters.
Page 40 SET POINT FORMAT NAME OHSP xx.xF OCSP xx.xF UHSP xx.xF UCSP xx.xF SASP xx.xF OATL xx.xF NTLO xx.xF RTIO xx.x LIMT xx.xF xxx% LOWMDP xxx% IAQS xxxx UHDB xx.xF UCDB xx.xF LTMP xxx% HTMP xxx% PES1 xxx% PES2 xxx% LEGEND —...
Page 41 When cooling, the control will energize the power ex- haust enable output to the external power exhaust controller, when power exhaust is used. If occupied, the control will perform economizer control (economizer control same as described above for CV units). If unoccupied, the control will perform nighttime free cool and IAQ pre-occupancy purge as required (when enabled through software).
Page 42 LEGEND T — Terminal NOTE: The 4 to 20 mA input is a ﬁeld-supplied non- Carrier EMS (Energy Management System) device. in supply-air temperature per degree of space temperature change. A reset limit will exist which will limit the maxi- mum number of degrees the supply-air temperature may be raised.
Page 43 INDOOR AIR QUALITY CONTROL — The accessory ex- pansion board and accessory IAQ sensor are required for IAQ control. The Carrier sensors operate with a 4 to 20 mA sig- nal. The 4 to 20 mA signal is connected to T11 (+) and T12 (−) on the expansion board for the IAQ sensor, and T13 (+)
Page 44: Service
III Solid-State Head Pressure Control is a ﬁeld-installed ac- cessory fan speed control device actuated by a temperature sensor. It is speciﬁcally designed for use on Carrier equip- ment and controls the condenser-fan motor speed in re- sponse to the saturated condensing temperature. For outdoor temperatures down to −20 F, it maintains condensing tem-...
Page 45 Witco Chemical Corp....Suniso 3GS IMPORTANT: Do not use reclaimed oil or oil that has been exposed to the atmosphere. Refer to Carrier Stand- ard Service Techniques Manual, Chapter 1, Refriger- ants section, for procedures to add or remove oil.
Page 46 NOTES: 1. Torque set screws on blower wheel to 70 in. lbs ± 2 in. lbs. 2. Torque set screw on propeller fan to 15 in. lbs ± 2 in. lbs. 3. Dimensions are in inches. Fig. 48 — Gas Heat Section Details Evaporator Performance Adjustment (Fig.
Page 47 Refrigerant Charge — Amount of refrigerant charge is listed on unit nameplate and in Table 1. Refer to Carrier GTAC II; Module 5; Charging, Recovery, Recycling, and Reclamation section for charging methods and procedures.
Page 48: Ej,Ek,Ew,Ey024
Fig. 50 — Belt Tension Adjustment Fig. 51 — Condenser-Fan Adjustment Fig. 52 — Cooling Charging Chart, 48EJ,EK,EW,EY024-034 Fig. 53 — Cooling Charging Chart, 48EJ,EK,EW,EY038-048 Main Burners — For all applications, main burners are factory set and should require no adjustment. MAIN BURNER REMOVAL (Fig.
Page 49 Determine the cause and correct it before resetting the breaker. If the evaporator-fan motor is replaced with a different horsepower motor, resiz- ing of the circuit breaker is required. Contact Carrier Application Engineering. CONDENSER-FAN MOTOR PROTECTION — Each condenser-fan motor is internally protected against overtemperature.
Page 50 LEGEND and NOTES for Fig. 56-60 — Typical Wiring Schematics — Adjustable Heat Anticipator — Building Pressure — Burner Relay — Contactor, Compressor — Capacitor — Circuit Breaker — Cooling Compensator — Controller Circuit Breaker — Crankcase Heater — Communication COMP —...
Page 51 Fig. 56 — Typical Power Schematic; 48EJ,EK,EW,EY024-034; 208/230-3-60 and 460-3-60...
Page 52 Fig. 57 — Typical VAV 115-v Control Circuit...
Page 53 Fig. 58 — Typical CV 115-v Control Circuit...
Page 54 Fig. 59 — Typical VAV 24-v Control Circuit...
Page 55 Fig. 60 — Typical CV 24-v Control Circuit...
Page 56: Troubleshooting
TROUBLESHOOTING Typical refrigerant circuiting diagrams are shown in Fig. 61-63. An algorithm diagram of the IGC (Integrated Gas Unit Con- troller) control is shown in Fig. 64. LEGEND FPS — Freeze Protection Switch HPS — High-Pressure Switch LPS — Low-Pressure Switch Fig.
Page 57 LEGEND FPS — Freeze Protection Switch HPS — High-Pressure Switch LPS — Low-Pressure Switch Fig. 62 — Typical Refrigerant Circuiting (48EJ,EK,EW,EY038,044)
Page 58 LEGEND FPS — Freeze Protection Switch HPS — High-Pressure Switch LPS — Low-Pressure Switch Fig. 63 — Typical Refrigerant Circuiting (48EJ,EK,EW,EY048)
Page 59: Igc Control Scheme (Heating And Cooling)
LEGEND IDM — Induced-Draft Motor IGC — Integrated Gas Unit Controller NOTE: Thermostat Fan Switch in the ‘‘AUTO’’ position or sensor-equipped unit. Fig. 64 — IGC Control (Heating and Cooling)
Page 60: Alarm Codes For The Igc Control Board
Refer to Table 23 below for a de- scription of alarms. The yellow LED blinks during transmis- sion with the CCN (Carrier Comfort Network). The green LED blinks during transmission with the expansion board. Table 23 — Control Board LED Alarms Description The expansion board and control board ﬂash the red LED in one-second...
Page 61 Fire — Unit Shutdown — DI (24 vac) T22-25 Fire — Pressurization — DI (24 vac) LEGEND (Tables 24-26) — Analog Input — Analog Output CCN — Carrier Comfort Network — Constant Volume — Direct Input — Direct Output — High Voltage — Indoor Air Quality NOTE: For 4 to 20 mA signals, all even numbered terminals are negative (−) polarity, and all odd numbered terminals are positive (+) polarity.
Page 62 For a free Service Training Material Catalog (STM), call 1-800-962-9212. Ordering instructions are included. Copyright 1997 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, speciﬁcations or designs without notice and without incurring obligations. Book 1 PC 111 Catalog No.
Page 63 MODEL NO.: SOFTWARE VERSION (SEE FIG. 16) DATE: PRE-START-UP: VERIFY THAT DIP SWITCH SETTINGS ARE CORRECT VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT REMOVE ALL SHIPPING HOLDDOWN BOLTS AND BRACKETS PER INSTRUCTIONS VERIFY INSTALLATION OF ECONOMIZER HOOD VERIFY INSTALLATION OF ALL OPTIONS AND ACCESSORIES VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT...
Page 64 ADDITIONAL NOTES: _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ Copyright 1997 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, speciﬁcations or designs without notice and without incurring obligations. Book 1 PC 111 Catalog No. 564-962 psig psig Printed in U.S.A.

Carrier SINGLE PACKAGE ROOFTOP UNITS ELECTRIC COOLING/GAS HEATING 48EJ Installation And Service Instructions Manual

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SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

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