Carrier WeatherExpertTM 48LC rooftop unit Installation instructions

Below you will find brief information for rooftop unit WeatherExpertTM 48LC. This document provides a step-by-step guide for installing the WeatherExpertTM 48LC rooftop unit. It covers everything from planning unit location and supporting the unit to connecting gas piping and making electrical connections.

PDF

Document

48LC

Single Package Rooftop

Gas Heating/Electric Cooling Unit

with Puronr (R---410A) Refrigerant

Sizes: 04, 05, 06

Installation Instructions

NOTE: Read the entire instruction manual before starting

the installation

TABLE OF CONTENTS

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . .

Rated Indoor Airflow (cfm)

INSTALLATION

. . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 1 -- Plan for Unit Location . . . . . . . . . . . . . . . . . .

Roof Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 2 -- Plan for Sequence of Unit Installation

Curb--Mount Installation

Pad--Mount Installation

Step 3 -- Inspect Unit

. . . . . .

. . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . .

Frame--Mount Installation . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 4 -- Provide Unit Support

Roof Curb Mount

. . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . .

Slab Mount (Horizontal Units Only) . . . . . . . . . . .

Alternate Unit Support

(In Lieu of Curb or Slab Mount)

Step 5 -- Field Fabricate Ductwork

Step 6 -- Rig and Place Unit

Positioning on Curb

. . . . . . . . . . . . . .

. . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . .

Step 7 -- Convert to Horizontal and Connect

Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 8 -- Install Outside Air Hood . . . . . . . . . . . . . . .

Economizer Hood Package Removal and Setup —

Factory Option . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Economizer Hood . . . . . . . . . . . . . . . . . . . . . . . . .

Step 9 -- Units with Hinged Panels Only . . . . . . . . . .

Step 10 -- Install Flue Hood . . . . . . . . . . . . . . . . . . . .

Step 11-- Install Gas Piping . . . . . . . . . . . . . . . . . . . . .

Factory--Option Thru--Base Connections

(Gas Connections) . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . .

Step 12 -- Install External Condensate Trap and Line . .

Step 13 -- Make Electrical Connections 16

Field Power Supply . . . . . . . . . . . . . . . . . . . . . . . .

Units with Factory--Installed Non--Fused

Disconnect or HACR . . . . . . . . . . . . . . . . . . . . . .

Units without Factory--Installed Non--Fused

Disconnect or HACR . . . . . . . . . . . . . . . . . . . . . .

All Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Convenience Outlets . . . . . . . . . . . . . . . . . . . . . . .

HACR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Factory--Option Thru--Base Connections

(Electrical Connections) . . . . . . . . . . . . . . . . . . . .

Units without Thru--Base Connections . . . . . . . . .

Field Control Wiring . . . . . . . . . . . . . . . . . . . . . . .

Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Unit without Thru--Base Connection Kit . . . . . . .

Heat Anticipator Settings

Humidi--MiZer

. . . . . . . . . . . . . . . . . . .

Control Connections . . . . . . . . . .

Humidi--MiZer -- Space RH Controller

EconoMi$er X (Factory Option)

. . . . . . . .

. . . . . . . . . . . . . . .

ComfortLINK (Factory Option)

RTU Open Control System

. . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . .

Supply Air Temperature (SAT) Sensor . . . . . . . . .

Outdoor Air Temperature (OAT) Sensor

EconoMi$er2

. . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . .

Space Temperature (SPT) Sensors . . . . . . . . . . . .

Indoor Air Quality (CO

) Sensor

Outdoor Air Quality Sensor

. . . . . . . . . . . . .

. . . . . . . . . . . . . . . . .

Space Humidity Sensor or Humidistat

Smoke Detector/Fire Shutdown (FSD)

. . . . . . . . .

Connecting Discrete Inputs . . . . . . . . . . . . . . . . . .

Communication Wiring -- Protocols . . . . . . . . . . . .

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Local Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RTU Open Troubleshooting

Outdoor Air Enthalpy Control

. . . . . . . . . . . . . . . . .

Differential Enthalpy Control

Return Air Enthalpy Sensor

. . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . .

Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 14 -- Adjust Factory--Installed Options . . . . . . . .

Step 15 -- Install Accessories . . . . . . . . . . . . . . . . . . .

APPENDIX -- VFD Operation with Remote Keypad . .

UNIT START--UP CHECKLIST . . . . . . . . . . . . . . . . . .

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance, 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 qualified installer or agency must use factory--authorized kits or accessories 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. Consult local building codes and appropriate national electrical codes (in USA, ANSI/NFPA70,

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 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 personal injury or death.

Disconnect gas piping from unit when leak testing at pressure 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.

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personal injury or death.

Before performing service or maintenance operations on unit, always turn off main power switch to unit and install lock(s) and lockout tag(s). Unit may have more than one power switch.

WARNING

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could cause personal injury, death and/or equipment damage.

Puronr (R--410A) refrigerant systems operate at higher pressures than standard R--22 systems. Do not use R--22 service equipment or components on Puron refrigerant equipment.

WARNING

PERSONAL INJURY AND ENVIRONMENTAL

HAZARD

Failure to follow this warning could cause personal injury or death.

Relieve pressure and recover all refrigerant before system repair or final unit disposal.

Wear safety glasses and gloves when handling refrigerants. Keep torches and other ignition sources away from refrigerants and oils.

CAUTION

CUT HAZARD

Failure to follow this caution may result in personal injury.

Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing, safety glasses and gloves when handling parts and servicing air conditioning equipment.

Rated Indoor Airflow (cfm)

The table to the right lists the rated indoor airflow used for the AHRI efficiency rating for the units covered in this document.

Model Number

48LC**04

48LC**05

48LC**06

Position:

Example:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

4 8 L C D 0 0 6 A 0 A 5 0 A 0 A 0

Full Load Airflow (cfm)

1050

1400

1750

Unit Heat Type

48 - Gas Heat Packaged Rooftop

Model Series - WeatherExpert TM

LC - Ultra High Efficiency

Heat Options

D = Low Gas Heat

E = Medium Gas Heat

F = High Gas Heat

L = Low Nox – Low Gas Heat

M = Low Nox – Medium Gas Heat

N = Low Nox – High Gas Heat

S = Low Heat w/ Stainless Steel Exchanger

R = Medium Heat w/ Stainless Steel Exchanger

T = High Heat w/ Stainless Steel Exchanger

(Low Nox models include – Stainless Steel HX)

Refrig. Systems Options

0 = Two stage cooling capacity

A = Two stage cooling capacity

with Humidi-MiZer System (not available

with ComfortLink controls)

Cooling Tons

04 - 3 ton

05 - 4 ton

06 - 5 ton

Sensor Options

A = None

B = RA Smoke Detector

C = SA Smoke Detector

D = RA + SA Smoke Detector

E = CO

F = RA Smoke Detector and CO

G = SA Smoke Detector and CO

H = RA + SA Smoke Detector and CO

Indoor Fan Options

0 = Standard Electrical (Direct) Drive x13 ECM Motor

2 = Medium Static Belt Drive with VFD controller

3 = High Static Belt Drive with VFD controller

Coil Options: Fin/Tube (Condenser- Evaporator - Hail Guard)

A = Al/Cu - Al/Cu

B = Precoat Al/Cu - Al/Cu

C = E-coat Al/Cu - Al/Cu

D = E-coat Al/Cu - E-coat Al/Cu

E = Cu/Cu - Al/Cu

F = Cu/Cu - Cu/Cu

M = Al/Cu - Al/Cu — Louvered Hail Guard

N = Precoat Al/Cu - Al/Cu — Louvered Hail Guard

P = E-coat Al/Cu - Al/Cu — Louvered Hail Guard

Q = E-coat Al/Cu - E-coat Al/Cu — Louvered Hail Guard

R = Cu/Cu - Al/Cu — Louvered Hail Guard

S = Cu/Cu - Cu/Cu — Louvered Hail Guard

Packaging

0 = Standard

1 = LTL

Electrical Options

A = None

B = HACR Breaker

C = Non-Fused Disconnect

D = Thru-The-Base Connections

E = HACR Breaker with

F = Non-Fused Disconnect and

Service Options

0 = None

1 = Unpowered Convenience Outlet

2 = Powered Convenience Outlet

3 = Hinged Panels

4 = Hinged Panels and

Unpowered Convenience Outlet

5 = Hinged Panels and

Powered Convenience Outlet

Intake / Exhaust Options

A = None

B = Temperature Economizer with Barometric Relief

E = Enthalpy Economizer with Barometric Relief

N = Ultra Low Leak Temperature Economizer

with Barometric Relief

R = Ultra Low Leak Enthalpy Economizer with

Base Unit Controls

0 = Base Electromechanical Controls

1 = RTU Open Multi-Protocol Controller

2 = ComfortLink Controls (not available for units

equipped with Humidi-MiZer option)

Design Revision

- = Factory Design Revision

Voltage

1 = 575/3/60

5 = 208-230/3/60

6 = 460/3/60

Fig. 1 -- 48LC 04--06 Model Number Nomenclature (Example)

C13382

Vertical Connections / Economizer

Horizontal Connections / Economizer

Fig. 2 -- Unit Dimensional Drawing

C12141

C12142

Fig. 2 -- Unit Dimensional Drawing (cont.)

LOCATION

DIMENSION

48---in (1219 mm)

18---in (457 mm)

18---in (457) mm

12---in (305 mm)

42---in (1067 mm)

36---in (914 mm)

Special

36---in (914 mm)

18---in (457 mm)

48---in (1219 mm)

42---in (1067 mm)

36---in (914 mm)

Special

CONDITION

Unit disconnect is mounted on panel

No disconnect, convenience outlet option

Recommended service clearance

Minimum clearance

Surface behind servicer is grounded (e.g., metal, masonry wall)

Surface behind servicer is electrically non---conductive (e.g., wood, fiberglass)

Check sources of flue products within 10---ft of unit fresh air intake hood

Side condensate drain is used

Minimum clearance

No flue discharge accessory installed, surface is combustible material

Surface behind servicer is grounded (e.g., metal, masonry wall, another unit)

Surface behind servicer is electrically non---conductive (e.g., wood, fiberglass)

Check for adjacent units or building fresh air intakes within 10---ft (3 m) of this unit’s flue outlet

NOTE: Unit not designed to have overhead obstruction. Contact Application Engineering for guidance on any application planning overhead obstruction or for vertical clearances.

Fig. 3 -- Service Clearance Dimensional Drawing

C08337

INSTALLATION

Jobsite Survey

Complete the following checks before installation.

1. Consult local building codes and the NEC (National

Electrical Code) ANSI/NFPA 70 for special installation requirements.

2. Determine unit location (from project plans) or select unit location.

3. Check for possible overhead obstructions which may interfere with unit lifting or rigging.

Step 1 — Plan for Unit Location

Select a location for the unit and its support system (curb or other) that provides for the minimum clearances required for safety. This includes the clearance to combustible surfaces, unit performance and service access below and around unit as specified in Fig. 3.

NOTE: Consider also the effect of adjacent units.

Be sure that unit is installed such that snow will not block the combustion intake or flue outlet.

Unit may be installed directly on wood flooring or on

Class A, B, or C roof--covering material when roof curb is used.

Do not install unit in an indoor location. Do not locate air inlets near exhaust vents or other sources of contaminated

48LC**

Base Unit

Economizer

Vertical

Horizontal

Humidi---MiZer R System

Cu Fins

Powered Outlet

Curb

14---in/356 mm

24---in/610 mm air. For proper unit operation, adequate combustion and ventilation air must be provided in accordance with

Section 5.3 (Air for Combustion and Ventilation) of the

National Fuel Gas Code, ANSI Z223.1 (American

National Standards Institute) and NFPA (National Fire

Protection Association) 54 TIA----54----84----1. In Canada, installation must be in accordance with the CAN1----B149 installation codes for gas burning appliances.

Although unit is weatherproof, avoid locations that permit water from higher level runoff and overhangs to fall onto the unit.

Locate mechanical draft system flue assembly at least 4 ft

(1.2 m) from any opening through which combustion products could enter the building, and at least 4 ft (1.2 m) from any adjacent building (or per local code). Locate the flue assembly at least 10 ft (3.05 m) from an adjacent unit’s fresh air intake hood if within 3 ft (0.91 m) of same elevation (or per local code). When unit is located adjacent to public walkways, flue assembly must be at least 7 ft (2.1 m) above grade.

Select a unit mounting system that provides adequate height to allow installation of condensate trap per requirements. Refer to Step 11 — Install External

Condensate Trap and Line – for required trap dimensions.

Roof Mount —

Check building codes for weight distribution requirements. Unit operating weight is shown in Table 1.

Table 1 – Operating Weights

505 (229)

UNITS LB (KG)

590 (268)

50 (23)

80 (36)

50 (23)

25 (11)

35 (16)

115 (52)

197 (89)

50 (23)

80 (36)

55 (25)

43 (20)

35 (16)

115 (52)

197 (89)

600 (272)

50 (23)

80 (36)

55 (25)

56 (25)

35 (16)

115 (52)

197 (89)

Step 2 — Plan for Sequence of Unit Installation

The support method used for this unit will dictate different sequences for the steps of unit installation. For example, on curb--mounted units, some accessories must be installed on the unit before the unit is placed on the curb.

Review the following for recommended sequences for installation steps.

Curb--mounted Installation —

Install curb

Install field--fabricated ductwork inside curb

Install accessory thru--base service connection package

(affects curb and unit) (refer to accessory installation instructions for details)

Prepare bottom condensate drain connection to suit planned condensate line routing (refer to Step 11 for details)

Rig and place unit

Install outdoor air hood

Install flue hood

Install gas piping

Install condensate line trap and piping

Make electrical connections

Install other accessories

Pad--mounted Installation —

Prepare pad and unit supports

Check and tighten the bottom condensate drain connection plug

Rig and place unit

Convert unit to side duct connection arrangement

Install field--fabricated ductwork at unit duct openings

Install outdoor air hood

Install flue hood

Install gas piping

Install condensate line trap and piping

Make electrical connections

Install other accessories

Frame--mounted Installation —

Frame--mounted applications generally follow the sequence for a curb installation. Adapt as required to suit specific installation plan.

Step 3 — Inspect Unit

Inspect unit for transportation damage. File any claim with transportation agency.

Confirm before installation of unit that voltage, amperage and circuit protection requirements listed on unit data plate agree with power supply provided.

Step 4 — Provide Unit Support

Roof Curb Mount —

Accessory roof curb details and dimensions are shown in

Fig. 4. Assemble and install accessory roof curb in accordance with instructions shipped with the curb.

NOTE: The gasketing of the unit to the roof curb is

critical for a watertight seal. Install gasket supplied with the roof curb as shown in Fig. 4. Improperly applied gasket can also result in air leaks and poor unit performance.

Curb should be level. This is necessary for unit drain to function properly. Unit leveling tolerances are show in

Fig. 5. Refer to Accessory Roof Curb Installation

Instructions for additional information as required.

Install insulation, cant strips, roofing felt, and counter flashing as shown. Ductwork must be attached to curb and

not to the unit. The accessory thru--the--base power and gas connection package must be installed before the unit

is set on the roof curb. If field--installed thru--the--roof curb gas connections are desired, use factory--supplied

--in. pipe coupling and gas plate assembly to mount the thru--the--roof curb connection to the roof curb. Gas connections and power connections to the unit must be field installed after the unit is installed on the roof curb.

If electric and control wiring is to be routed through the basepan, attach the accessory thru--the--base service connections to the basepan in accordance with the accessory installation instructions.

Slab Mount (Horizontal Units Only) —

Provide a level concrete slab that extends a minimum of

6 in. (150 mm) beyond unit cabinet. Install a gravel apron in front of condenser coil air inlet to prevent grass and foliage from obstructing airflow.

NOTE: Horizontal units may be installed on a roof curb

if required.

Alternate Unit Support

(In Lieu of Curb or Slab Mount) —

A non--combustible sleeper rail can be used in the unit curb support area. If sleeper rails cannot be used, support the long sides of the unit with a minimum of 3 equally spaced 4--in. x 4--in. (102 mm x 102 mm) pads on each side.

Fig. 4 -- Roof Curb Details

C13310

MAXIMUM ALLOWABLE

DIFFERENCE IN. (MM)

A-B

0.5” (13)

B-C

1.0” (25)

A-C

1.0” (25)

C06110

Fig. 5 -- Unit Leveling Tolerances

Step 5 — Field Fabricate Ductwork

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. Do not connect ductwork to unit.

Fabricate supply ductwork so that the cross sectional dimensions are equal to or greater than the unit supply duct opening 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.

Ducts passing through unconditioned spaces must be insulated and covered with a vapor barrier.

If a plenum return is used on a vertical unit, the return should be ducted through the roof deck to comply with applicable fire codes.

A minimum clearance is not required around ductwork.

CAUTION

PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in damage to roofing materials.

Membrane roofs can be cut by sharp sheet metal edges. Be careful when placing any sheet metal parts on such roof.

Step 6 — Rig and Place Unit

Keep unit upright and do not drop. Spreader bars are required. Rollers may be used to move unit across a roof.

Level by using unit frame as a reference. See Table 1 and

Fig. 6 for additional information.

Lifting holes are provided in base rails as shown in Fig. 6.

Refer to rigging instructions on unit.



Rigging materials under unit (cardboard or wood) must be removed PRIOR to placing the unit on the roof curb.

When using the standard side drain connection, ensure the red plug in the alternate bottom connection is tight. Do this before setting the unit in place. The red drain pan plug can be tightened with a

--in. square socket drive extension. For further details see “Step 12 -- Install External Condensate

Trap and Line” on page 16.

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage.

All panels must be in place when rigging. Unit is not designed for handling by fork truck when packaging is removed.

Before setting the unit onto the curb, recheck gasketing on curb.

Positioning on Curb —

Position unit on roof curb so that the following clearances are maintained:

4 in. (6.4 mm) clearance between the roof curb and the base rail inside the front and rear, 0.0 in.

clearance between the roof curb and the base rail inside on the duct end of the unit. This will result in the distance between the roof curb and the base rail inside on the condenser end of the unit being approximately

4 in. (6.4

mm).

Although unit is weatherproof, guard against water from higher level runoff and overhangs.

Flue vent discharge must have a minimum horizontal clearance of 4 ft (1220 mm) from electric and gas meters, gas regulators, and gas relief equipment. Minimum distance between unit and other electrically live parts is

48 inches (1220 mm).

Flue gas can deteriorate building materials. Orient unit such that flue gas will not affect building materials. Locate mechanical draft system flue assembly at least 48 in. (1220 mm) from an adjacent building or combustible material.

NOTE: Installation of accessory flue discharge deflector

kit will reduce the minimum clearance to combustible material to 18 in. (460 mm).

After unit is in position, remove rigging skids and shipping materials.

717

CAUTION - NOTICE TO RIGGERS:

AVERTISSEMENT - REMARQUE À

L’ATTENTION DES MONTEURS

ALL PANELS MUST BE IN PLACE WHEN RIGGING.

TOUS LES CAPOTS DOIVENT ÊTRE EN PLACE AVANT LE LEVAGE

• Hook rigging shackles through holes in base rail, as shown in Detail “A”.

• Use wooden top skid, when rigging, to prevent rigging straps from damaging unit.

• Max weight includes base unit plus shipping pallet plus all available FIOP's which could

be on that size unit.

• "B" dimension is based on base unit (PAC no heat or YAC w/low heat) plus economizer

option only. This dimension may vary slightly with units configured with other FIOP

options.

• Spreader bars required to lift and transport the unit.

• Accrocher les manilles des élingues de levages dans les trous situés dans le rail

de base comme indiqué au Détail « A ».

• Utiliser des cales en bois lors du levage pour éviter que les élingues n’endommagent

le haut de l’appareil.

• Le poids maximum inclut la configuration de base, le poids de la palette d'expédition,

ainsi que toutes les options pouvant être installées en usine (FIOP) pour la

• La dimension de "B" provient de la configuration de base (PAC sans chauffage ou

YAC chauffage au gaz natufrel) qui inclut l'option economizer seulement. Cette

dimension peut varier légèrement en fonction des différentes options sélectionnées,

installées en usine (FIOP).

• Barres d'écartement requises pour soulever et transporter l'unité.

REQUIRED

SPREADER

BARS

“B”

914-1371

(36"- 54")

PLACE ALL SEAL STRIP IN PLACE

BEFORE PLACING UNIT ON ROOF CURB.

INSTALLER TOUTES LES BANDES

D’ISOLATION EN PLACE AVANT DE

PLACER L’APPAREIL SUR LE REBORD

DE TOIT.

DUCT END

PASSAGES CONDUITES

DETAIL A

DÉTAIL « A »

“C”

MODEL

50LC_004

50LC_005

50LC_006

48LC_004

48LC_005

48LC_006

“A”

SEE DETAIL “A”

VOIR DÉTAIL « A »

MAX WEIGHT

700

830

318

377

865

760

393

345

895

930

407

423

74.5

1890

36.5

36.0

38.0

37.5

925

915

965

955

33.5

41.5

33.5

41.5

850

1055

850

1055

48HC500030 A

Fig. 6 -- Rigging Label

C12100

Step 7 — Convert to Horizontal and Connect

Ductwork (when required)

Unit is shipped in the vertical duct configuration. Unit

without factory--installed economizer or return air smoke detector option may be field--converted to horizontal ducted configuration. To convert to horizontal configuration, remove screws from side duct opening covers and remove covers. Using the same screws, install covers on vertical duct openings with the insulation--side down. Seals around duct openings must be tight. See Fig. 7.

Step 8 — Install Outside Air Hood

Economizer Hood 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 compartment behind the indoor coil access panel. The hood assembly’s metal tray is attached to the basepan and also attached to the damper using two plastic tie-wraps.

2. To gain access to the hood, remove the filter access panel. (See Fig. 8.)

FILTER ACCESS PANEL

C06108

Fig. 7 -- Horizontal Conversion Panels

Field--supplied flanges should be attached to horizontal duct openings and all ductwork should be secured to the flanges. Insulate and weatherproof all external ductwork, joints, and roof or building openings with counter flashing and mastic in accordance with applicable codes.

Do not cover or obscure visibility to the unit’s informative data plate when insulating horizontal ductwork.

COMPRESSOR

ACCESS PANEL

OUTDOOR-AIR OPENING AND

INDOOR COIL ACCESS PANEL

C06023

Fig. 8 -- Typical Access Panel Locations

3. Locate the (2) screws holding the metal tray to the basepan and remove. Locate and cut the (2) plastic tie--wraps securing the assembly to the damper. (See

Fig. 9) Be careful to not damage any wiring or cut tie--wraps securing any wiring.

Hood Parts

Plastic Tie Wrap

Qty (2)

Screws for Metal Tray

Qty (2)

Fig. 9 -- Economizer Hood Parts Location

C08639

4. Carefully lift the hood assembly (with metal tray) through the filter access opening and assemble per the steps outlined in Economizer Hood.

Economizer 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.

1. The indoor coil access panel will be used as the top of the hood. Remove the screws along the sides and bottom of the indoor coil access panel. See Fig. 10.

4. Insert the hood divider between the hood sides. See

Fig. 11 and 12. Secure hood divider with 2 screws on each hood side. The hood divider is also used as the bottom filter rack for the aluminum filter.

5. Open the filter clips which are located underneath the hood top. Insert the aluminum filter into the bottom filter rack (hood divider). Push the filter into position past the open filter clips. Close the filter clips to lock the filter into place. See Fig. 12.

6. Caulk the ends of the joint between the unit top panel and the hood top.

7. Replace the filter access panel.

TOP

PANEL

INDOOR

COIL

ACCESS

PANEL

CAULK

HERE

TOP

PANEL

INDOOR

COIL

ACCESS

PANEL

Fig. 10 -- Indoor Coil Access Panel Relocation

C06025

2. Swing out indoor coil access panel and insert the hood sides under the panel (hood top). Use the screws provided to attach the hood sides to the hood top. Use screws provided to attach the hood sides to the unit. See

Fig. 11.

TOP

PANEL

INDOOR COIL

ACCESS PANEL

DIVIDER

OUTSIDE

AIR

CLEANABLE

ALUMINUM

FILTER

HOOD

BAROMETRIC

RELIEF

Fig. 12 -- Economizer Filter Installation

FILTER

CLIP

C08634

Step 9 — Units with Hinged Panels Only

Relocate latch shipped inside the hinged compressor door to location shown in Fig. 13 after unit installation.

If the unit does not have hinged panels, skip step 9 and continue at step 10.

LEFT

HOOD

SIDE

(483mm)

SCREW

33 3/8”

(848mm)

HOOD DIVIDER

Fig. 11 -- Economizer Hood Construction

C06026

3. Remove the shipping tape holding the economizer barometric relief damper in place (economizer only).

Fig. 13 -- Compressor Door Latch Location

C12101

Step 10 — Install Flue Hood

Flue hood is shipped screwed to the basepan beside the burner compartment access panel. Remove from shipping location and using screws provided, install flue hood and screen in location shown in Fig. 14.

BLOWER

ACCESS

PANEL

C07081

Fig. 14 -- Flue Hood Details

Step 11 — Install Gas Piping

Installation of the 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, installation must be accordance with the CAN/CSA B149.1 and CAN/CSA

B149.2 installation codes for gas burning appliances.

This unit is factory equipped for use with Natural Gas fuel at elevations up to 2000 ft (610 m) above sea level. Unit may be field converted for operation at elevations above

2000 ft (610 m) and/or for use with liquefied petroleum fuel. See accessory kit installation instructions regarding these accessories.

NOTE:

Furance gas input rate on rating plate is for installation up to 2000 ft (610 m) above sea level. In U.S.A.

the input rating for altitudes above 2000 ft (610 m) must be derated by 4% for each 1000 ft (305 m) above sea level. In

Canada the input rating must be derated by 10% for altitudes of 2000 ft (610 m) to 4500 ft (1372 m) above sea level.

For natural gas applications, gas pressure at unit gas connection must not be less than 4 in. wg (996 Pa) or greater than 13 in. wg (3240 Pa) while the unit is operating. On

48LCF/N/T*05--06 (high--heat) units, the gas pressure at unit gas connection must not be less than 5 in. wg (1245 Pa) or greater than 13 in. wg (3240 Pa) while the unit is operating.

For liquified petroleum applications, the gas pressure must not be less than 11 in. wg (2740 Pa) or greater than 13.6 in.

wg (3390 Pa) at the unit connection.

Table 2 – Natural Gas Supply Line Pressure Ranges

UNIT MODEL

48LCD/E/L/M/S/R*

48LCF/N/T*

(High Heat units only)

UNIT SIZE

04, 05, 06

05, 06

MIN

4.0 in. wg

(996 Pa)

5.0 in. wg

(1245 Pa)

MAX

13.0 in. wg

(3240 Pa)

13.0 in. wg

(3240 Pa)

Table 3 – Liquid Propane Supply Line Pressure Ranges

UNIT MODEL

48LCD/E/S/R*

48LCF/T*

(High Heat units only)

UNIT SIZE

04, 05, 06

05, 06

MIN

11.0 in. wg

(2740 Pa)

11.0 in. wg

(2740 Pa)

MAX

13.0 in. wg

(3240 Pa)

13.0 in. wg

(3240 Pa)

The gas supply pipe enters the unit at the burner access panel on the front side of the unit, through the long slot at the bottom of the access panel. The gas connection to the unit is made to the

--in. FPT gas inlet port on the unit gas valve

Manifold pressure is factory--adjusted for NG fuel use.

Adjust as required to obtain best flame characteristics.

Table 4 – Natural Gas Manifold Pressure Ranges

UNIT MODEL

48LCD/E/L/M/S/R*

48LCF/N/T*

(High Heat units only)

UNIT SIZE HIGH FIRE LOW FIRE

04, 05, 06

3.5 in. wg

(872 Pa)

1.7 in. Wg

(423 Pa)

05, 06

3.5 in. wg

(872 Pa)

1.7 in. Wg

(423 Pa)

Manifold pressure for LP fuel use must be adjusted to specified range. Follow instructions in the accessory kit to make initial readjustment.

Table 5 – Liquid Propane Manifold Pressure Ranges

UNIT MODEL

48LCD/E/S/R*

48LCF/T*

(High Heat units only)

UNIT SIZE HIGH FIRE LOW FIRE

04, 05, 06

10.0 in. wg

(2490 Pa)

5.0 in. Wg

(1245 Pa)

05, 06

10.0 in. wg

(2490 Pa)

5.0 in. Wg

(1245 Pa)

CAUTION

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in damage to equipment.

When connecting the gas line to the unit gas valve, the installer MUST use a backup wrench to prevent damage to the valve.

Install a gas supply line that runs to the unit heating section. Refer to the NFPA 54/NFGC or equivalent code for gas pipe sizing data. Do not use a pipe size smaller than

--in. Size the gas supply line to allow for a maximum pressure drop of 0.5--in wg (124 Pa) between gas regulator source and unit gas valve connection when unit is operating at high--fire flow rate.

The gas supply line can approach the unit in three ways: horizontally from outside the unit (across the roof), thru--curb/under unit basepan (accessory kit required) or through unit basepan (factory--option or accessory kit required). Consult accessory kit installation instructions for details on these installation methods. Observe clearance to gas line components per Fig. 15.

9” MINIMUM CLEARANCE

FOR PANEL REMOVAL

GAS

MANUAL GAS

SHUTOFF VALVE *

REGULATOR

BASE UNIT

48” MINIMUM

BASE RAIL

FROM

GAS

METER

DRIP LEG

PER NFGC *

ROOF

CURB

LEGEND

NFGC – National Fuel Gas Code

Field supplied.

NOTE: Follow all local codes.

FIELD-FABRICATED

SUPPORT

STEEL PIPE

NOMINAL DIAMETER

(in.)

1 /

3 /

1 /

2 or 1 or larger

SPACING OF SUPPORTS

X DIMENSION

(ft)

C11091

Fig. 15 -- Gas Piping Guide

(with Accessory Thru--the--Curb Service Connections)

Factory--Option Thru--Base Connections

(Gas Connections)—

This service connection kit consists of a adapter fitting (brass), two

--in NPT gas

--in electrical bulkhead connectors and a

--in electrical bulkhead connector, all factory--installed in the embossed (raised) section of the unit basepan in the condenser section.

LOW VOLTAGE

CONDUIT

CONNECTOR and extend it through the access panel at the gas support bracket. See Fig. 17.

EMBOSSMENT

BRASS FITTING

FOR 3-6 TON UNITS

SUPPORT

BRACKET

C13411

Fig. 17 -- Gas Line Piping for 3 to 5 Ton Units Only

Other hardware required to complete the installation of the gas supply line will include a manual shutoff valve, a sediment trap (drip leg) and a ground--joint union. A pressure regulator valve may also be required (to convert gas pressure from pounds to inches of pressure). The manual shutoff valve must be located within 6--ft (1.83 m) of the unit. The union, located in the final leg entering the unit, must be located at least 9--in (230 mm) away from the access panel to permit the panel to be removed for service.

If a regulator valve is installed, it must be located a minimum of 4--ft (1220 mm) away from the unit’s flue outlet. Some municipal codes require that the manual shutoff valve be located upstream of the sediment trap. See Figures

18 and 19 for typical piping arrangements for gas piping that has been routed through the sidewall of the curb. See Fig. 20 for typical piping arrangement when thru--base is used.

Ensure that all piping does not block access to the unit’s main control box or limit the required working space in front of the control box.

HIGH VOLTAGE

CONDUIT

CONNECTOR

BRASS FITTING FOR 3 TO 6 TON UNITS.

C13410

Fig. 16 -- Fittings

The thru--base gas connector has male and female threads.

The male threads protrude above the basepan of the unit; the female threads protrude below the basepan.

Check tightness of connector lock nuts before connecting gas piping.

Install a

--in NPT street elbow on the thru--base gas fitting. Attach a

--in pipe nipple with minimum length of 16--in (406 mm) (field--supplied) to the street elbow

Thru-Curb Adapter

Shut Off

Valve

9” (229mm) min

Union

Drip

Leg

Fig. 18 -- Gas Piping

Unit Base Rail

C07469

Burner

Access

Panel

Thru-Curb Adapter

9” (229mm) min

Shut Off

Valve

Fig. 19 -- Gas Piping

Union

Unit Base Rail

Drip

Leg

C07470

Fig. 20 -- Gas Piping Thru--Base Connections

C08018

When installing the gas supply line, observe local codes pertaining 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:

1. Avoid low spots in long runs of pipe. Grade all pipe

/4--in. in every 15 ft (7 mm in every 5 m) to prevent traps. Grade all horizontal runs downward to risers.

Use risers to connect to heating section and to meter.

2. Protect all segments of piping system against physical and thermal damage. Support all piping with appropriate straps, hangers, etc. Use a minimum of one hanger every 6 ft (1.8 m). For pipe sizes larger than

--in., follow recommendations of national codes.

3. Apply joint compound (pipe dope) sparingly and only to male threads of joint when making pipe connections. Use only pipe dope that is resistant to action of liquefied petroleum gases as specified by local and/or national codes. If using PTFE (Teflon) tape, ensure the material is Double Density type and is labeled for use on gas lines. Apply tape per manufacturer’s instructions.

4. Pressure--test all gas piping in accordance with local and national plumbing and gas codes before connecting piping to unit.

NOTE: Pressure test the gas supply system after the gas

supply piping is connected to the gas valve. The supply piping must be disconnected from the gas valve during the testing of the piping systems when test pressure is in excess of 0.5 psig (3450 Pa). Pressure test the gas supply piping system at pressures equal to or less than 0.5 psig

(3450 Pa). The unit heating section must be isolated from the gas piping system by closing the external main manual shutoff valve and slightly opening the ground--joint union.

Check for gas leaks at the field--installed and factory--installed gas lines after all piping connections have been completed. Use soap--and--water solution (or method specified by local codes and/or regulations).

WARNING

FIRE OR EXPLOSION HAZARD

Failure to follow this warning could result in personal injury, death and/or property damage.

Connect gas pipe to unit using a backup wrench to avoid damaging gas controls.

Never purge a gas line into a combustion chamber.

Never test for gas leaks with an open flame. Use a commercially available soap solution made specifically for the detection of leaks to check all connections.

Use proper length of pipe to avoid stress on gas control manifold.

NOTE: If orifice hole appears damaged or it is suspected

to have been redrilled, check orifice hole with a numbered drill bit of correct size. Never redrill an orifice. A burr--free and squarely aligned orifice hole is essential for proper flame characteristics.

Fig. 21 -- Orifice Hole

BURNER

ORIFICE

A93059

Step 12 — Install External Condensate Trap and Line

The unit has one

-in. condensate drain connection on the end of the condensate pan and an alternate connection on the bottom. See Fig. 22. Unit airflow configuration does not determine which drain connection to use. Either drain connection can be used with vertical or horizontal applications.

To use the alternate bottom drain connection, remove the red drain plug from the bottom connection (use a

--in.

square socket drive extension) and install it in the side drain connection.

The piping for the condensate drain and external trap can be completed after the unit is in place. See Fig. 23.

CONDENSATE PAN (SIDE VIEW)

STANDARD

SIDE DRAIN

DRAIN PLUG

(FACTORY-INSTALLED)

ALTERNATE

BOTTOM DRAIN

Fig. 22 -- Condensate Drain Pan (Side View)

C08021

MINIMUM PITCH

1” (25mm) PER

10’ (3m) OF LINE

BASE RAIL

OPEN

VENT

2˝ (51) MIN

TO ROOF

DRAIN

SEE NOTE

ROOF

CURB

DRAIN PLUG

NOTE: Trap should be deep enough to offset maximum unit static

C08022

Fig. 23 -- Condensate Drain Piping Details

All units must have an external trap for condensate drainage. Install a trap at least 4-in. (102 mm) deep and protect against freeze-up. If drain line is installed downstream from the external trap, pitch the line away

( from the unit at 1-in. per 10 ft (25 mm in 3 m) of run. Do not use a pipe size smaller than the unit connection

-in.).

Step 13 — Make Electrical Connections

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Do not use gas piping as an electrical ground. Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. This ground may consist of electrical wire connected to unit ground lug in control compartment, or conduit approved for electrical ground when installed in accordance with NEC (National Electrical Code);

ANSI/NFPA 70, latest edition (in Canada, Canadian

Electrical Code CSA [Canadian Standards

Association] C22.1), and local electrical codes.

NOTE: Field--supplied wiring shall conform with the

limitations of minimum 63_F (33_C) rise.

Field Power Supply —

If equipped with optional Powered Convenience Outlet:

The power source leads to the convenience outlet’s transformer primary are not factory connected. Installer must connect these leads according to required operation of the convenience outlet. If an always--energized convenience outlet operation is desired, connect the source leads to the line side of the unit--mounted disconnect. (Check with local codes to ensure this method is acceptable in your area.) If a de--energize via unit disconnect switch operation of the convenience outlet is desired, connect the source leads to the load side of the unit disconnect. On a unit without a unit--mounted disconnect, connect the source leads to compressor contactor C and indoor fan terminal block (IFTB) pressure lugs with unit field power leads.

Refer to Fig. 38 for power transformer connections and the discussion on connecting the convenience outlet on page 24.

Field power wires are connected to the unit at line--side pressure lugs on compressor contactor C and indoor fan terminal block (IFTB) (see wiring diagram label for control box component arrangement) or at factory--installed option non--fused disconnect switch or

HACR. Max wire size is #2ga AWG (copper only) per pole on contactors. #2ga AWG per pole on optional disconnect or HACR and 4/0 AWG per pole on terminal or fuse block on units with single point box. See Fig. 30 and unit label diagram for field power wiring connections.

Fig. 24 -- 48LC Control Wiring Diagram

C14045

Fig. 25 -- 48LC Control Wiring Diagram with Humidi--MiZer

C14082

Fig. 26 -- 48LC Power Wiring Diagram, 208/230V, 460V 3 Phase

C14043

Fig. 27 -- 48LC Power Wiring Diagram, 575V 3 Phase

C14044

Fig. 28 -- 48LC ComfortLINK Power Wiring Diagram, 208/230V, 460V 3 Phase

C13389

Fig. 29 -- 48LC ComfortLINK Power Wiring Diagram 575V 3 Phase

C13390

Units Without Disconnect or HACR Option

13 IFTB

Equip

GR Lug

Disconnect per

NEC

L1 L2

208/230-3-60

460-3-60

575-3-60

L3 Ground

(GR)

Units With Disconnect or HACR Option

L1 2

Ground

(GR)

3 Phase Only

Optional

Disconnect

Switch

3 Phase Only

Factory

Wiring

Equip GR Lug

Fig. 30 -- Power Wiring Connections

C12148

WARNING

FIRE HAZARD

Failure to follow this warning could result in intermittent operation or performance satisfaction.

Do not connect aluminum wire between disconnect switch and 48LC unit. Use only copper wire.

(See Fig. 31.)

C12278

Fig. 32 -- Location of Non--Fused Disconnect Enclosure

To field install the NFD shaft and handle:

1. Remove the unit front panel (see Fig. 2).

2. Remove (3) hexagon screws on the front cover -- (2) on the face of the cover and (1) on the left side cover.

3. Remove the front cover of the NFD enclosure.

4. Make sure the NFD shipped from the factory is at

OFF position (the arrow on the black handle knob is at OFF).

5. Insert the shaft with the cross pin on the top of the shaft in the horizontal position.

6. Measure from the tip of the shaft to the top surface of the black pointer; the measurement should be 3.75 --

3.88 in. (95 -- 99 mm).

7. Tighten the locking screw to secure the shaft to the

NFD.

8. Turn the handle to the OFF position with red arrow pointing at OFF.

9. Install the handle on to the painted cover horizontally with the red arrow pointing to the left.

10. Secure the handle to the painted cover with (2) screws and lock washers supplied.

11. Engaging the shaft into the handle socket, re--install

(3) hexagon screws on the front cover.

12. Re--install the unit front panel.

ELECTRIC

DISCONNECT

SWITCH

COPPER

WIRE ONLY

ALUMINUM

WIRE

A93033

Fig. 31 -- Disconnect Switch and Unit

Units With Factory--Installed Non--Fused Disconnect or

HACR —

The factory--installed optional non--fused disconnect (NFD) or HACR switch is located in a weatherproof enclosure located under the main control box. The manual switch handle and shaft is shipped in the disconnect or HACR enclosure. Assemble the shaft and handle to the switch at this point.

Fig. 33 -- Handle and Shaft Assembly for NFD

C12279

C12280

Fig. 34 -- Location of HACR Enclosure

To field install the HACR shaft and handle:

1. Remove the unit front panel (see Fig. 2).

2. Remove (3) hexagon screws on the front cover -- (2) on the face of the cover and (1) on the left side cover.

3. Remove the front cover of the HACR enclosure.

4. Make sure the HACR shipped from the factory is at

OFF position (the white arrow pointing at OFF).

5. Insert the shaft all the way with the cross pin on the top of the shaft in the horizontal position.

6. Tighten the locking screw to secure the shaft to the

HACR.

7. Turn the handle to the OFF position with red arrow pointing at OFF.

8. Install the handle on to the painted cover horizontally with the red arrow pointing to the left.

9. 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) hexagon screws on the front cover.

11. Re--install the unit front panel.

C12281

Fig. 35 -- Handle and Shaft Assembly for HACR

Units Without Factory--Installed Non--Fused Disconnect or HACR —

When installing units, provide a disconnect switch per

NEC (National 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.

All Units —

All field wiring must comply with NEC and all local codes. Size wire based on MCA (Minimum Circuit Amps) on the unit informative plate. See Fig. 30 and the unit label diagram for power wiring connections to the unit power terminal blocks and equipment ground. Maximum wire size is #2ga AWG per pole on contactors. #2ga AWG per pole on optional disconnect or HACR. See Fig. 30 and unit label diagram for field power wiring connections.

Provide a ground--fault and short--circuit over--current protection device (fuse or breaker) per NEC Article 440

(or local codes). Refer to unit informative data plate for

MOCP (Maximum Over--current Protection) device size.

NOTE: Units ordered with factory installed HACR do

not need an additional ground--fault and short--circuit over--current protective device unless required by local codes.

All field wiring must comply with the NEC and local requirements.

All units except 208/230-v units are factory wired for the voltage shown on the nameplate. If the 208/230-v unit is

to be connected to a 208-v power supply, the control transformer must be rewired by moving the black wire with the

-in. female spade connector from the 230--v connection and moving it to the 200-v

-in. male

terminal on the primary side of the transformer. Refer to unit label diagram for additional information.

NOTE: Check all factory and field electrical connections

for tightness.

Convenience Outlets —

WARNING

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. Locate its disconnect switch, if appropriate, and switch to off position.

Lock--out and tag--out this switch, if necessary.

Two types of convenience outlets are offered on 48LC models: Non--powered and unit--powered. Both types provide a 125--volt GFCI (ground--fault circuit--interrupter) duplex receptacle rated at 15--A behind a hinged waterproof access cover, located on the end panel of the unit. See Fig. 36.

Convenience

Outlet

GFCI

Pwd-CO

Fuse

Switch

Pwd-CO

Transformer

Control Box

Access Panel

C08128

Fig. 36 -- Convenience Outlet Location

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 installed 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. The kit includes the hinged cover, a backing plate and gasket.

DISCONNECT ALL POWER TO UNIT AND

CONVENIENCE OUTLET. LOCK--OUT AND TAG--OUT

ALL POWER.

Remove the blank cover plate at the convenience outlet; discard the blank cover.

Loosen the two screws at the GFCI duplex outlet, until approximately

-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; tighten the two screws until snug (do not over-tighten).

Mount the weatherproof cover to the backing plate as shown in Fig. 37. Remove two slot fillers in the bottom of the cover to permit service tool cords to exit the cover.

Check for full closing and latching.

COVER – WHILE-IN-USE

WEATHERPROOF

RECEPTACLE

NOT INCLUDED

Non--powered type: This type requires the field

installation of a general--purpose 125--volt 15--A circuit powered from a source elsewhere in the building. Observe national and local codes when selecting wire size, fuse or breaker requirements and disconnect switch size and location. Route 125--v power supply conductors into the bottom of the utility box containing the duplex receptacle.

Unit--powered type: A unit--mounted transformer is

factory--installed to stepdown the main power supply voltage to the unit to 115--v at the duplex receptacle. This option also includes a manual switch with fuse, located in a utility box and mounted on a bracket behind the convenience outlet; access is through the unit’s control box access panel. See Fig. 36.

The primary leads to the convenience outlet transformer are not factory--connected. Selection of primary power source is a customer--option. If local codes permit, the transformer primary leads can be connected at the line--side terminals on the unit--mounted non--fused disconnect or HACR breaker switch; this will provide service power to the unit when the unit disconnect switch or HACR switch is open. Other connection methods will result in the convenience outlet circuit being de--energized when the unit disconnect or

HACR switch is open. See Fig. 38.

BASE PLATE FOR

GFCI RECEPTACLE

Fig. 37 -- Weatherproof Cover Installation

C09022

UNIT

VOLTAGE

208,

230

460

575

CONNECT

240

480

600

PRIMARY

CONNECTIONS

L1: RED +YEL

L2: BLU + GRA

L1: RED

Splice BLU + YEL

L2: GRA

L1: RED

L2: GRA

C08283

TRANSFORMER

TERMINALS

H1 + H3

H2 + H4

H2 + H3

Fig. 38 -- Powered Convenience Outlet Wiring

Using unit--mounted convenience outlets: Units with

unit--mounted convenience outlet circuits will often require that two disconnects be opened to de--energize all power to the unit. Treat all units as electrically energized until the convenience outlet power is also checked and de--energization is confirmed. Observe National Electrical

Code Article 210, Branch Circuits, for use of convenience outlets.

Fuse on power type: The factory fuse is a Bussman

“Fusetron” T--15, non--renewable screw--in (Edison base) type plug fuse.

NOTICE

Convenience Outlet Utilization

Maximum Continuous use : 8 Amps 24/7

50HJ542739 B

C13415

Fig. 39 -- Convenience Outlet Utilization Notice Label

Duty Cycle: the unit--powered convenience outlet has a duty

cycle limitation. The transformer is intended to provide power on an intermittent basis for service tools, lamps, etc; it is not intended to provide 15--amps loading for continuous duty loads (such as electric heaters for overnight use).

Observe a 50% limit on circuit loading above 8--amps.

Convenience outlet usage rating:

Continuous usage: 8 amps maximum

Test the GFCI receptacle by pressing the TEST button on the face of the receptacle to trip and open the receptacle.

Check for proper grounding wires and power line phasing if the GFCI receptacle does not trip as required. Press the

RESET button to clear the tripped condition.

HACR —

The amp rating of the HACR factory installed option is based on the size, voltage, indoor motor and other electrical options of the unit as shipped from the factory.

If field installed accessories are added or changed in the field (i.e. electric heat, power exhaust, ERV), the HACR may no longer be of the proper amp rating and therefore will need to be removed from the unit. See unit nameplate and label on factory installed HACR for the amp rating of the HACR that was shipped with the unit from the factory.

See unit nameplates for the proper fuse, HACR or maximum over--current protection device required on the unit with field installed accessories.

Fig. 40 -- HACR Caution Label

C12105

Factory--Option Thru--Base Connections (Electrical

Connections)—

This service connection kit consists of a adapter fitting (brass), a

/ connector and a

--in NPT gas

--in electrical bulkhead

--in electrical bulkhead connector, all factory--installed in the embossed (raised) section of the unit basepan in the condenser section. The bulkhead connector enables the low--voltage control wires to pass through the basepan. The to pass through the basepan. See Fig. 16.

--in

--in electrical bulkhead connector allows the high--voltage power wires

Check tightness of connector lock nuts before connecting electrical conduits.

Field--supplied and field--installed liquid tight conduit connectors and conduit may be attached to the connectors on the basepan. Pull correctly rated high voltage and low voltage through appropriate conduits. Connect the power conduit to the internal disconnect (if unit is so equipped) or to the external disconnect (through unit side panel). A hole must be field cut in the main control box bottom on the left side so the 24--v control connections can be made.

Connect the control power conduit to the unit control box at this hole.

Units without Thru--Base Connections —

1. Install power wiring conduit through side panel openings. Install conduit between disconnect and control box.

2. Install power lines to terminal connections as shown in Fig. 30.

Voltage to compressor terminals during operation must be within voltage range indicated on unit nameplate. See

Tables 8 and 9. On 3--phase units, voltages between phases must be balanced within 2% and the current within

10%. Use the formula shown in the legend for Tables 8 and 9., Note 2 to determine the percent of voltage imbalance. Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation would invalidate any applicable Carrier warranty.

Field Control Wiring —

The 48LC unit requires an external temperature control device. This device can be a thermostat (field--supplied) or, the RTU Open Controller for Building Management

Systems using non--CCN protocols (RTU Open is available as a factory--installed option only)., or a space temperature sensor (SPT) with factory installed

ComfortLINK controller.

Thermostat —

Install a Carrier--approved accessory thermostat according to installation instructions included with the accessory.

For complete economizer function and 2 stage compressor operation, select a two--stage cooling thermostat. Locate the thermostat accessory on a solid wall in the conditioned space to sense average temperature in accordance with the thermostat installation instructions.

If the thermostat contains a logic circuit requiring 24--v power, use a thermostat cable or equivalent single leads of different colors with minimum of seven leads. If the thermostat does not require a 24--v source (no “C”

connection required), use a thermostat cable or equivalent with minimum of six leads. Check the thermostat installation instructions for additional features which might require additional conductors in the cable.

For wire runs up to 50 ft. (15 m), use no. 18 AWG

(American Wire Gage) insulated wire [35_C (95_F) minimum]. For 50 to 75 ft. (15 to 23 m), use no. 16 AWG insulated wire [35_C (95_F) minimum]. For over 75 ft.

(23 m), use no. 14 AWG insulated wire [35_C (95_F) minimum]. All wire sizes larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat.

Typical

Thermostat

Connections

Central

Terminal

Board

O/B/Y2

(Note 1)

(Note 2)

Note 1: Typical multi-function marking. Follow manufacturer’s configuration

Instructions to select Y2.

Note 2: Y2 to Y2 connection required for 2 stage cooling opeation and when integrated economizer function is desired.

Field Wiring

C12149

Fig. 41 -- Low--Voltage Connections

Unit without Thru--Base Connection Kit —

Pass the thermostat control wires through the hole provided in the corner post; then feed the wires through the raceway built into the corner post to the control box.

Pull the wires over to the terminal strip on the upper--left corner of the Controls Connection Board. See Fig. 42.

RACEWAY

NOTE:

If thru--the--bottom connections accessory is used, refer to the accessory installation instructions for information on routing power and control wiring.

Heat Anticipator Settings —

Set heat anticipator settings at 0.14 amp for the first stage and 0.14 amp for second--stage heating, when available.

Humidi--MiZer

Control Connections

NOTE: It is suggested to ensure the Auto--Changeover

function of an installed thermostat is enabled when used in conjunction with the Humidi--MiZer Adaptive

Dehumidification system.

Humidi--MiZer – Space RH Controller —

The Humidi--MiZer dehumidification system requires a field--supplied and --installed space relative humidity control device. This device may be a separate humidistat control (contact closes on rise in space RH above control setpoint) or a combination thermostat--humidistat control device such as Carrier’s EDGE

Pro Thermidistat with isolated contact set for dehumidification control. The humidistat is normally used in applications where a temperature control is already provided (units with

ComfortLINK or RTU Open controls).

To connect the Carrier humidistat (HL38MG029):

1. Route the humidistat 2--conductor cable (field--supplied) through the hole provided in the unit corner post.

2. Feed wires through the raceway built into the corner post (see Fig. 42) to the 24--v barrier located on the left side of the control box. The raceway provides the

UL--required clearance between high--voltage and low--voltage wiring.

3. Use wire nuts to connect humidistat cable to the leads in the low–voltage wiring (as shown in Fig. 45), connecting PKN to PNK and PNK/BLK to PNK/BLK.

To connect the Thermidistat device (33CS2PPRH--03):

1. Route the Thermidistat multi--conductor thermostat cable (field--supplied) through the hole provided in the unit corner post.

2. Feed wires through the raceway built into the corner post (see Fig. 42) to the 24--v barrier located on the left side of the control box. The raceway provides the

UL--required clearance between high--voltage and low--voltage wiring.

3. The Thermidistat has dry contacts at terminals D1 and D2 for dehumidification operation (see Fig. 46).

The dry contacts must be wired between CTB terminal R and the PNK/BLK lead to the LTLO switch with field--supplied wire nuts. Refer to the installation instructions included with the Carrier

Edge Thermidistat device (Form 33CS--74SI or latest) for more information.

HOLE IN END PANEL (HIDDEN)

Fig. 42 -- Field Control Wiring Raceway

C08027

% RELATIVE HUMIDITY

Fig. 43 -- Accessory Field--Installed Humidistat

C09295

Fig. 44 -- EDGE Pro Thermidistat

C09296

Fig. 45 -- Typical Humidi--MiZer

Adaptive Dehumidification System Humidistat Wiring

C13391

Edge Programable Thermostat

O/W2/B

Unit CTB

THERMOSTAT

OAT

RRS

SRTN

HUM

V+

Humidi-MiZer™ FIOP

*Connection not required.

Fig. 46 -- Typical Rooftop Unit with Humidi--MiZer Adaptive Dehumidification System with EDGE Pro Thermidistat Device

EconoMi$er X (Factory--Option)

For details on operating 48LC units equipped with the factory--installed EconoMi$er X option, refer to

EconoMi$er X Factory--Installed Option Low Leak

Economizer for 2 Speed SAVt (Staged Air Volume)

Systems (Catalog No. LLECON--02SI, or later).

ComfortLINK (Factory--Option)

C13066

For details on operating 48LC units equipped with the factory installed ComfortLINK option, refer to Controls,

Start--Up, Operation and Troubleshooting for 48/50LC

04--06 Single Package Rooftop Unit with ComfortLINK

Controls (Catalog No. 48--50LC--C01T, or later).

NOTE: ComfortLINK is not available on units equipped

with Humidi--MiZer .

Fig. 47 -- 48LC Control Box Component Locations with ComfortLINK

C12150

Fig. 48 -- ComfortLINK Control Wiring Diagram (48LC 3--5 Ton Units)

C14083

RTU Open Control System

The RTU Open control is factory--mounted in the 48LC unit’s main control box, to the left of the CTB. See

Fig. 50. Factory wiring is completed through harnesses connected to the CTB. Field connections for RTU Open sensors will be made at the Phoenix connectors on the

RTU Open board. The factory--installed RTU Open control includes the supply--air temperature (SAT) sensor.

The outdoor air temperature (OAT) sensor is included in the FIOP/accessory EconoMi$er2 package.

Board Power

The RTU Open controller is an integrated component of the

Carrier rooftop unit. Its internal application programming provides optimum performance and energy efficiency. RTU

Open enables the unit to run in 100% stand--alone control mode, Carrier’s I--Vu Open network, or a Third Party

Building Automation System (BAS). On--board DIP switches allow you to select your protocol (and baud rate) of choice among the four most popular protocols in use today:

BACnet, Modbus, Johnson N2 and LonWorks. (See Fig. 49.)

Refer to Table 6, RTU Open Controller Inputs and Outputs for locations of all connections to the RTU Open board.

J1 J2

(AO-1)

0-10VDC

4-20mA

J5 J5

J22

J13

J12

Lonworks

Option Card

Port

J17

Network Comm

Example set for

BACnet MS/TP and 76.8K baud

(1, 2, and 4 ON)

Recommended for all i-Vu Open installations

J15

J20

J19

J14

Protocol Selector *Remove both for 0-5V

SPT (temp input)

SPT (common)

SPT (offset input)

BACnet, Modbus, or N2

(LON connection J15)

Fig. 49 -- RTU Open Multi--Protocol Control Board

J11

DO-6

(H) Humidimizer

DO-7

(Reversing Valve/High Speed Fan)

DO-8

(Power Exhaust)

C12751

Fig. 50 -- 48LC Control Box Component Locations with RTU Open

C12152

Fig. 51 -- RTU Open System Control Wiring Diagram

C13392

Fig. 52 -- RTU Open System Control Wiring Diagram with Humidi--MiZer

C13393

Table 6 – RTU Open Controller Inputs and Outputs

POINT NAME

Space Temp / Zone Temp

Supply Air Temperature

Outdoor Air Temperature

Space Temperature Offset Pot

Safety Chain Feedback

Compressor Safety Status

Fire Shutdown Status

Enthalpy Status

Humidistat Input Status

Zone Temperature

Indoor Air CO2

Outdoor Air CO2

Space Relative Humidity

Supply Fan Status*

Filter Status*

Door Contact Input*

Occupancy Contact*

Economizer Output

Supply Fan Relay State

Compressor 1 Relay State

Compressor 2 Relay State

Heat Stage 1 Relay State

Heat Stage 2 Relay State

Power Exhaust Relay State

Humidimizer Relay State

BACnet OBJECT

NAME

econ_output sfan comp_1 comp_2 heat_1 heat_2 pexh dehum

TYPE OF I/O

DEDICATED INPUTS

zone_temp AI (10K Thermistor) sa_temp AI (10K Thermistor) oa_temp stpt_adj_offset safety_status comp_status

AI (10K Thermistor)

AI (100K Potentiometer)

DI (24 VAC)

DI (24 VAC) firedown_status enthalpy_status humstat_status n/a

DI (24 VAC)

DI (24 VAC) n/a iaq

CONFIGURABLE INPUTS

AI (4---20 ma) oaq space_rh sfan_status filter_status door_contact_status occ_contact_status

AI (4---20 ma)

DI (24 VAC)

OUTPUTS

AO (4---20ma)

DO Relay (24VAC , 1A)

DO Relay (24VAC, 1A)

LEGEND

AI --- Analog Input

AO --- Analog Output

DI --- Discrete Input

DO --- Discrete Output

* These inputs (if installed) take the place of the default input on the specific channel according to schematic.

Parallel pins J5---1 = J2---6, J5---3 = J1---10, J5---5 = J1---2 are used for field---installation.

CONNECTION PIN

NUMBER(S)

J20---1 & 2

J2---1 & 2

J2---3 & 4

J20---3 & 4

J1---9

J1---2

J1---10

J2---6 & 7

J5---7 & 8

J13---1, 2, 3, 4

J4---2 & 3 or J4---5 & 6

J5---1 or J5---3 or J5---5

J2---5

J1---4

J1---8

J1---7

J1---6

J1---5

J11---1 & 3

J11---7, 8

The RTU Open controller requires the use of a Carrier space sensor. A standard thermostat cannot be used with the RTU Open system.

Supply Air Temperature (SAT) Sensor —

On FIOP--equipped 48LC unit, the unit is supplied with a supply--air temperature (SAT) sensor (33ZCSENSAT).

This sensor is a tubular probe type, approx 6--inches (152 mm) in length. It is a nominal 10--k ohm thermistor.

The SAT is factory--wired. The SAT probe is wire--tied to the supply--air opening (on the horizontal opening end) in its shipping position. Remove the sensor for installation.

Re--position the sensor in the flange of the supply--air opening or in the supply air duct (as required by local codes). Drill or punch a

--in. hole in the flange or duct.

Use two field--supplied, self--drilling screws to secure the sensor probe in a horizontal orientation. See Fig. 53.

SUPPLY AIR

TEMPERATURE

SENSOR

SUPPLY AIR RETURN AIR

ROOF

CURB

C08200

Fig. 53 -- Typical Mounting Location for Supply Air

Temperature (SAT) Sensor on Small Rooftop Units

Outdoor Air Temperature (OAT) Sensor —

The OAT is factory--mounted in the EconoMi$er2 (FIOP or accessory). It is a nominal 10k ohm thermistor attached to an eyelet mounting ring.

EconoMi$er2 —

The RTU Open control is used with EconoMi$er2 (option or accessory) for outdoor air management. The damper position is controlled directly by the RTU Open control;

EconoMi$er2 has no internal logic device.

Outdoor air management functions can be enhanced with field--installation of these accessory control devices:

Enthalpy control (outdoor air or differential sensors)

Space CO

2 sensor

Outdoor air CO

2 sensor

Field Connections

Field connections for accessory sensors and input devices are made at the RTU Open, at plugs J1, J2, J4, J5, J11 and J20.

All field control wiring that connects to the RTU Open must be routed through the raceway built into the corner post as shown in Fig. 42. The raceway provides the UL required clearance between high-- and low--voltage wiring. Pass the control wires through the hole provided in the corner post, then feed the wires thorough the raceway to the RTU Open.

Connect to the wires to the removable Phoenix connectors and then reconnect the connectors to the board.

Space Temperature (SPT) Sensors —

There are two types of SPT sensors available from Carrier, resistive input non-communicating (T55, T56, and T59) and Rnet communicating (SPS, SPPL, SPP, and SPPF) sensors. Each type has a variety of options consisting of: timed override button, set point adjustment, a LCD screen, and communication tie in. Space temperature can be also be written to from a building network or zoning system. However, it is still recommended that return air duct sensor be installed to allow stand-alone operation for back-up. Refer to the configuration section for details on controller configurations associated with space sensors.

33ZCT55SPT, space temperature sensor with override button (T--55)

33ZCT56SPT, space temperature sensor with override button and setpoint adjustment (T--56)

33ZCT59SPT, space temperature sensor with LCD

(liquid crystal display) screen, override button, and setpoint adjustment (T--59)

Use 20 gauge wire to connect the sensor to the controller.

The wire is suitable for distances of up to 500 ft. Use a three--conductor shielded cable for the sensor and setpoint adjustment connections. If the setpoint adjustment

(slidebar) is not required, then an unshielded, 18 or 20 gauge, two--conductor, twisted pair cable may be used.

Connect T--55: See Fig. 54 for typical T--55 internal

connections. Connect the T--55 SEN terminals to RTU

Open J20--1 and J20--2. See Fig. 55.

1 2

3 4 5

RED(+)

WHT(GND)

BLK(-)

SEN

SW1

BRN (GND)

BLU (SPT)

1 2 3 4 5 6 RED(+)

WHT(GND)

BLK(-)

SW1

SEN SET

BLK

(T56)

BRN (GND)

BLU (SPT)

CCN COM

SENSOR WIRING

Fig. 54 -- T--55 Sensor

SEN

J20-1

SEN

J20-2

Fig. 55 -- RTU Open T--55 Sensor Connections

C08460

Connect T--56: See Fig. 56 for T--56 internal connections.

Install a jumper between SEN and SET terminals as illustrated. Connect T--56 terminals to RTU Open J20--1,

J20--2 and J20--3 per Fig. 57.

Cool Warm

Fig. 56 -- T--56 Internal Connections

C08202

SEN

CCN COM

SENSOR WIRING

JUMPER

TERMINALS

AS SHOWN

J20-1

C08201

SEN

J20-2

Jumper

SET

J20-3

Fig. 57 -- RTU Open T--56 Sensor Connections

C08461

Connect T--59: The T--59 space sensor requires a separate,

isolated power supply of 24 VAC. See Fig. 58 for internal connections at the T--59. Connect the SEN terminal (BLU) to RTU Open J20--1. Connect the COM terminal (BRN) to

J20--2. Connect the SET terminal (STO or BLK) to J20--3.

BLK (STO)

J20-3

BRN (COM)

OR SET SEN

BLU (SPT)

J20-2

SENSOR

WIRING

J20-1

To controller

8 7 6 5 4

2 1

24 Vac or Vdc

24 Vac Line

Dedicated Transformer

SENSOR LEGEND

2 Gnd (-24 Vac/Vdc)

4 -Thermistor

5 +Thermistor

OPB COM- PWR+

24 VAC

POWER

WIRING

NOTE: Must use a separate isolated transformer.

C10291

Fig. 58 -- Space Temperature Sensor Typical Wiring

(33ZCT59SPT)

Indoor Air Quality (CO

Sensor —

The indoor air quality sensor accessory monitors space carbon dioxide (CO

) levels. This information is used to monitor IAQ levels. Several types of sensors are available, for wall mounting in the space or in return duct, with and without LCD display, and in combination with space temperature sensors. Sensors use infrared technology to measure the levels of CO

2 present in the space air.

The CO

2 sensors are all factory set for a range of 0 to

2000 ppm and a linear mA output of 4 to 20. Refer to the instructions supplied with the CO typical CO

2 sensor wiring schematic.

sensor for electrical requirements and terminal locations. See Fig. 59 for

C12748

Fig. 59 -- Indoor/Outdoor Air Quality (CO

) Sensor

(33ZCSPTCO2--01 or 33ZCSPTCO2LCD--01)

Typical Wiring Diagram

To accurately monitor the quality of the air in the conditioned air space, locate the sensor near a return--air grille (if present) so it senses the concentration of CO

2 leaving the space. The sensor should be mounted in a location to avoid direct breath contact.

Do not mount the IAQ sensor in drafty areas such as near supply ducts, open windows, fans, or over heat sources.

Allow at least 3 ft (0.9 m) between the sensor and any corner. Avoid mounting the sensor where it is influenced by the supply air; the sensor gives inaccurate readings if the supply air is blown directly onto the sensor or if the supply air does not have a chance to mix with the room air before it is drawn into the return airstream.

Wiring the Indoor Air Quality Sensor: For each sensor,

use two 2--conductor 18 AWG (American Wire Gage) twisted--pair cables (unshielded) to connect the separate isolated 24 vac power source to the sensor and to connect the sensor to the control board terminals.

To connect the sensor to the control, identify the positive

(4 to 20 mA) and ground (SIG COM) terminals on the sensor. See Fig. 59. Connect the 4--20 mA terminal to

RTU Open J4--2 and connect the SIG COM terminal to

RTU Open J4--3. See Fig. 60.

OAQ Sensor

SEN J4-5

COM J4-6

24 VAC

Fig. 60 -- RTU Open / Outdoor CO

Sensor

(33ZCSPTCO2--01 or 33ZCSPTCO2LCD--01)

Connections

C11086

Outdoor Air Quality Sensor

(PNO 33ZCSENCO2 plus weatherproof enclosure) —

The outdoor air CO

2 sensor is designed to monitor carbon dioxide (CO

) levels in the outside ventilation air and interface with the ventilation damper in an HVAC system.

The OAQ sensor is packaged with an outdoor cover. See

Fig. 61. The outdoor air CO

2 economizer outside air hood.

sensor must be located in the

COVER REMOVED SIDE VIEW

Fig. 61 -- Outdoor Air Quality Sensor Cover

C07135

Wiring the Outdoor Air CO

Sensor: A dedicated

power supply is required for this sensor. A two--wire cable is required to wire the dedicated power supply for the sensor. The two wires should be connected to the power supply and terminals 1 and 2.

To connect the sensor to the control, identify the positive

(4 to 20 mA) and ground (SIG COM) terminals on the

OAQ sensor. See Fig. 59. Connect the 4 to 20 mA terminal to RTU Open J4--5. Connect the SIG COM terminal to RTU Open J4--6.

OAQ Sensor

SEN J4-5

COM J4-6

24 VAC

Fig. 62 -- RTU Open / Outdoor CO

Sensor

(33ZCSENCO2) Connections

C11086

Space Relative Humidity Sensor or Humidistat —

Humidi--MiZer

Control Wiring: In units equipped

with the Humidi--MiZer option there are two loose wires loose in the control box (one PNK and one PNK/BLK) used to control the dehumidification function of the unit.

These wires are meant to be tied to a space humidistat or thermidistat on an electromechanical unit. On RTU Open equipped units these wires must be connected to J11--7 &

8 to allow the Open board to operate the dehumidification function for the unit. Disconnect the J11 Phoenix style connector from the board and use the plug screws to secure the wires as follows: secure the PNK/BLK wires at pin 7 and the PNK wires at pin 8, and then reconnect the plug to the board at J11.

Relative Humidity Sensors (Space or Duct Mounted):

The accessory space humidity sensor (33ZCSENSRH-01) or duct humidity sensor (33ZCSENDRH-01) is used to measure the relative humidity of air within the space or return air duct. For wiring distances up to 500 ft (152 m), use a

3--conductor, 18 or 20 AWG shielded cable. The shield must be removed from the sensor end of the cable and grounded at the unit end. The current loop power for sensor is provided by the RTU Open controller as 24vdc. Refer to the instructions supplied with the RH sensor for the electrical requirements and terminal locations.

RTU Open configurations must be changed after adding an RH sensor.

See Fig. 63 and 64 for typical RH sensor wiring.

J4--1 or J4--4 = 24vdc loop power

J4--2 or J4--5 = 4--20mA signal input

NOTE: The factory default for dehumidification control

is normally open humidistat.

MOUNTING

HOLES

Vin

Gnd

6 5 4 3

WIRING

OPENING

Vin - J4-1 or J4-4 24Vdc

Io - J4-2 or J4-5 -20mA output

C11087

Fig. 63 -- Space Relative humidity Sensor Typical Wiring

J4-1 or J4-4 + 24 VDC Supply Voltage

J4-2 or J4-5 (-)4 to 20 mA Current Loop Output to RTU Open

4-20 VAC GND 0-5V

mA or or

VDC 0-10V

SPAN

ZERO

Relative Humidity Sensor

(Polarized Male Connector)

Humidistat: The accessory humidistat provides the RTU

Open insight to the relative humidity in the space. The humidistat reads the RH level in the space and compares it to its setpoint to operate a dry contact. The humidistat is a dedicated input on the configurable input 9 and tells the

RTU Open when the RH level is HIGH or LOW. The normal condition for humidity is LOW.

To wire in the field:

J5--8 = 24 VAC source for dry contact

J5--7 = Signal input

Smoke Detector/Fire Shutdown (FSD) —

On 48LC units equipped with factory--installed Smoke

Detector(s), the smoke detector controller implements the unit shutdown through its NC contact set connected to the unit’s CTB input. The FSD function is initiated via the smoke detector’s Alarm NO contact set. The RTU Open controller communicates the smoke detector’s tripped status to the BAS building control. See Fig. 51 (RTU

Open System Control wiring schematic).

The Fire Shutdown Switch configuration,

MENUConfigInputsinput 5, identifies the normally open status of this input when there is no fire alarm.

Connecting Discrete Inputs —

Filter Status: The filter status accessory is a

field--installed accessory. This accessory detects plugged filters. When installing this accessory, the unit must be configured for filter status by setting

MENUConfigInputsinput 3, 5, 8, or 9 to Filter

Status and normally open (N/O) or normally closed (N/C).

Input 8 or 9 is recommended for easy of installation. Refer to Fig. 49 and Fig. 51 for wire terminations at J5.

C10839

Fig. 64 -- Duct Relative Humidity Sensor Typical Wiring

Fan Status: The fan status accessory is a field--installed

accessory. This accessory detects when the indoor fan is blowing air. When installing this accessory, the unit must be configured for fan status by setting

MENUConfigInputsinput 3, 5, 8, or 9 to Fan Status and normally open (N/O) or normally closed (N/C). Input 8 or 9 is recommended for easy of installation. Refer to Fig.

49 and Fig. 51 for wire terminations at J5.

Remote Occupancy: The remote occupancy accessory is

a field--installed accessory. This accessory overrides the unoccupied mode and puts the unit in occupied mode.

When installing this accessory, the unit must be configured for remote occupancy by setting

MENUConfigInputsinput 3, 5, 8, or 9 to Remote

Occupancy and normally open (N/O) or normally closed

(N/C).

Also set MENUSchedulesoccupancy source to DI on/off. Input 8 or 9 is recommended for easy of installation. Refer to Fig. 49 and Table 6 for wire terminations at J5.

Power Exhaust (output): The relay used by the RTU

Open board to control power exhaust is a dry contact which means it does not have 24vac. This 24vac must be connected to the relay to allow it to operate the power exhaust relay in the PE accessory. A 24vac source must be provided to J11--2 on the RTU Open control board. This can be provided by the unit’s transformer from various sources. The “R” terminal on the unit’s low voltage terminal board (LVTB) is a logical source. Refer to Fig.

49 and Fig. 51 for wire terminations at J11.

Communication Wiring -- Protocols

General —

Protocols are the communication languages spoken by control devices. The main purpose of a protocol is to communicate information in the most efficient method possible. Different protocols exist to provide different kinds of information for different applications. In the BAS application, many different protocols are used, depending on manufacturer. Protocols do not change the function of a controller; just make the front end user different.

The RTU Open can be set to communicate on four different protocols: BACnet, Modbus, N2, and LonWorks.

Switch 3 (SW3) on the board is used to set protocol and baud rate. Switches 1 and 2 (SW1 and SW2) are used to set the board’s network address. See Fig. 65 and 66 for protocol switch settings and address switches. The 3rd party connection to the RTU Open is through plug J19.

See Fig. 67 for wiring.

NOTE: Power must be cycled after changing the SW1--3

switch settings.

Refer to the RTU Open v2 Integration Guide (Catalog No.

11--808--434--01) for more detailed information on protocols,

3rd party wiring, and networking.

PROTOCOL

BACnet MS/TP

(Master)

Modbus

(Slave)

LonWorks

DS8

Unused

NOTE:

DS = Dip Switch

BACnet MS/TP SW3 example shown

DS7

OFF

BAUD RATE

9600

19,200

38,400

76,800

Baud Rate Selections

DS2

OFF

SW3 Protocol Selection

DS6

OFF

DS5

OFF

DS4

DS1

OFF

Fig. 65 -- RTU Open SW3 Dip Switch Settings

DS3

OFF

DS2 DS1

Select Baud Select Baud

OFF

C07166

Fig. 66 -- RTU Open Address Switches

C10815

Fig. 67 -- Network Wiring

C10816

Local Access

BACview

Handheld: The BACview

6 is a keypad/display interface used to connect to the RTU Open to access the control information, read sensor values, and test the RTU, see Fig. 68. This is an accessory interface that does not come with the RTU Open controller and can only be used at the unit. Connect the BACview

6 to the RTU Open J12 local access port. There are two password protected levels in the display (User and Admin). The user password is defaulted to 0000 but can be changed. The Admin password is 1111 and cannot be changed. There is a 10 minute auto logout if a screen is idle. See Form

48--50HCTQ--02T (or later), Appendix A for navigation and screen content.

Virtual BACview:

Virtual BACview is a freeware computer program that functions as the BACview

Handheld. The

USB Link interface (USB--L) is required to connect a computer to the RTU Open board. The link cable connects a USB port to the J12 local access port. This program functions and operates identical to the handheld.

RTU Open Troubleshooting —

Communication LEDs The LEDs indicate if the

controller is speaking to the devices on the network. The

LEDs should reflect communication traffic based on the baud rate set. The higher the baud rate the more solid the

LEDs will appear. See Table 7.

NOTE: Refer to Catalog No. 48--50HCTQ--02T (or later)

for complete configuration of RTU Open, operating sequences and troubleshooting information. Refer to RTU

Open v2 Integration Guide (Catalog No. 11--808--434--01) for details on configuration and troubleshooting of connected networks. Have a copy of these manuals available at unit start--up.

Cable

Access Port

P1 P1

J12

P5 P5

Protocol Selector

RTU Open

BACview 6 Local Access Cable

Fig. 68 -- BACview

Handheld Connections

C12749

If this LED is on...

Power

DO#

If Run LED shows...

2 flashes per second

5 flashes per second

7 flashes per second

14 flashes per second

Table 7 – LEDs

The LEDs on the RTU Open show the status of certain functions

Status is...

RTU Open has power

RTU Open is receiving data from the network segment

RTU Open is transmitting data over the network segment

The digital output is active

The Run and Error LEDs indicate control module and network status

And Error LED shows...

Status is...

Normal Off

2 flashes, alternating with

Run LED

3 flashes, then off

Five minute auto---restart delay after system error

Control module has just been formatted

4 flashes, then pause

Off

7 flashes per second, alternating with

Run LED

14 flashes per second, alternating with

Run LED

Two or more devices on this network have the same ARC156 network address

Exec halted after frequent system errors or control programs halted

Exec start---up aborted, Boot is running

Firmware transfer in progress, Boot is running

Ten second recovery period after brownout

Brownout

Failure. Try the following solutions:

Turn RTU Open off, then on.

Format RTU Open.

Download memory to RTU Open.

Replace RTU Open.

Outdoor Air Enthalpy Control

(PNO 33CSENTHSW)

The enthalpy control (33CSENTHSW) is available as a field--installed accessory to be used with the EconoMi$er2 damper system. The outdoor air enthalpy sensor is part of the enthalpy control. (The separate field--installed accessory return air enthalpy sensor (33CSENTSEN) is required for differential enthalpy control. See Fig. 69.)

Locate the enthalpy control in the economizer next to the

Actuator Motor. Locate two GRA leads in the factory harness and connect the gray lead labeled “ESL” to the terminal labeled “LOW”. See Fig. 69. Connect the enthalpy control power input terminals to economizer actuator power leads RED (connect to 24V) and BLK (connect to GND).

The outdoor enthalpy changeover setpoint is set at the enthalpy controller.

Enthalpy

Switch

24V

GND

RED

BLK

PL6-1 (24-V)

PL6-4 (COM)

LOW GRA 7 CTB ECON

(P’LINK: to J4-2) or

(RTU Open: to J2-6)

Factory Wiring Harness

C11160

Fig. 69 -- Enthalpy Switch (33CSENTHSW) Connections

Differential Enthalpy Control —

Differential enthalpy control is provided by sensing and comparing the outside air and return air enthalpy conditions. Install the outdoor air enthalpy control as described above. Add and install a return air enthalpy sensor.

Return Air Enthalpy Sensor —

Mount the return--air enthalpy sensor (33SENTSEN) in the return--air section of the economizer. The return air sensor is wired to the enthalpy controller

(33CSENTHSW). See Fig. 70.

24V

– 4-20

Main

+ VDC

Out

GND

LOW

Outside Air

Enthalpy Switch

RED

BLK

GRA

PL6-1 (24-V)

PL6-4 (COM)

CTB ECON

(P’LINK: to J4-2) or

(RTU Open: to J2-6)

+ 24-36

VDC In

– 4-20 Main

Out

Return Air

Enthalpy

Sensor

C11161

Fig. 70 -- Outside and Return Air Enthalpy Sensor

Wiring

To wire the return air enthalpy sensor, perform the following:

1. Use a 2--conductor, 18 or 20 AWG, twisted pair cable to connect the return air enthalpy sensor to the enthalpy controller.

2. Connect the field--supplied RED wire to (+) spade connector on the return air enthalpy sensor and the

(+) terminal on the enthalpy controller. Connect the

BLK wire to (--) spade connector on the return air enthalpy sensor and the (--) terminal on the enthalpy controller.

Return Air

Smoke Detector

(as shipped)

Smoke Detectors

Smoke detectors are available as factory--installed options on

48LC models. Smoke detectors may be specified for Supply

Air only or for Return Air without or with economizer or in combination of Supply Air and Return Air. All components necessary for operation are factory--provided and mounted.

The unit is factory--configured for immediate smoke detector shutdown operation; additional wiring or modifications to unit terminal board may be necessary to complete the unit and smoke detector configuration to meet project requirements.

Units equipped with factory--optional Return Air smoke detectors require a relocation of the sensor module at unit installation. See Fig. 71 for the as shipped location.

Completing Installation of Return Air Smoke Sensor:

1. Unscrew the two screws holding the Return Air

Smoke Detector assembly. See Fig. 72, Step 1. Save the screws.

2. Turn the assembly 90 and then rotate end to end.

Make sure that the elbow fitting is pointing down. See

Fig. 72, Step 2.

3. Screw the sensor and detector plate into its operating position using screws from Step 1. See Fig. 72, Step 3.

4. Connect the flexible tube on the sampling inlet to the sampling tube on the basepan.

C12282

Fig. 71 -- Return Air Smoke Detector, Shipping Position

Additional Application Data —

Refer to Catalog No. HKRNKA--1XA for discussions on additional control features of these smoke detectors including multiple unit coordination.

Step 1 Step 2

Fig. 72 -- Completing Installation of Return Air Smoke Sensor

Step 3

C12283

SE or

HACR BR

Hz h--- --P M.V

0 - --6 - --3 208/230 - --60 - --3 460 0 - -6 - --3575 0 - --6 - --3 208/230 0 - --6 - --3 460 0 - --6 - --3 575

SE or

HACR BR

Hz h--- --P M.V

- --60 - --3 30 208/2 0 - --6 - --3 460 0 - --6 - --3 575

HACR BR

Hz h--- --P M.V

60 3--0--208/23 0 - --6 - --3 460 0 - --6 - --3 575 60 3--0--/23 208 0 - --6 - --3 460 0 - -6 - --3575

HACR BR

Hz h--- --P M.V

60 3--0--208/23 0 - --6 - --3 460 0 - --6 - --3 575

Legend and Notes for Tables 8 and 9

LEGEND:

BRKR

DISC

FLA

IFM

LRA

MCA

MOCP

PWRD CO

UNPWR CO

NOTES:

--- Belt drive indoor fan motor

--- Circuit breaker

--- Convenient outlet

--- Direct drive indoor fan motor

--- Disconnect

--- Full load amps

--- Indoor fan motor

--- Locked rotor amps

--- Minimum circuit amps

--- MAX FUSE or HACR Breaker

--- Power exhaust

--- Powered convenient outlet

--- Unpowered convenient outlet

1. In compliance with NEC requirements for multimotor and combination load equipment (refer to NEC Articles 430 and

440), the overcurrent protective device for the unit shall be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.

Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use the following formula to determine the percentage of voltage imbalance.

% Voltage Imbalance = 100 x max voltage deviation from average voltage average voltage

Example: Supply voltage is 230-3-60

AB = 224 v

BC = 231 v

AC = 226 v

Average Voltage =

(224 + 231 + 226)

681

= 227

Determine maximum deviation from average voltage.

(AB) 227 – 224 = 3 v

(BC) 231 – 227 = 4 v

(AC) 227 – 226 = 1 v

Maximum deviation is 4 v.

Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

227

= 1.76%

This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than

2%, contact your local electric utility company immediately.

Step 14 — Adjust Factory--Installed Options

Smoke Detectors —

Smoke detector(s) will be connected at the Central

Terminal Board (CTB), at terminals marked “Smoke

Shutdown”. Remove jumper JMP 3 when ready to energize unit.

Step 15 — Install Accessories

Available accessories include:

Curb

EconoMi$er X (with control)

EconoMi$er2 (without control/for external signal)

Power Exhaust

Differential dry--bulb sensor (EconoMi$er2)

Outdoor enthalpy sensor

Differential enthalpy sensor

2 sensor

Louvered hail guard

Phase monitor control

Refer to separate installation instructions for information on installing these accessories.

Pre--Start and Start--Up

—

This completes the mechanical installation of the unit.

Refer to the unit’s Service Manual for detailed Pre--Start and Start--Up instructions. Download the latest versions from HVAC Partners (www.hvacpartners.com).

APPENDIX —

VFD Operation with Remote Keypad

All 48LC size 04--06 units are equipped with a VFD

(Variable Frequency Drive) to automatically adjust the indoor fan motor speed in sequence with the unit’s ventilation, cooling and heating operation. The VFD keypad is included as standard on electro mechanical and RTU Open models. See Fig. 74 for location of the VFD and the VFD keypad in these units.

NOTE: ComfortLink models do not include the VFD

keypad as VFD control operation is accessed through the

ComfortLink controls.

The VFD keypad is shown in Fig. 73. The function of SOFT

KEYS 1 and 2 change depending on what is displayed on the screen. The function of SOFT KEY 1 matches the word in the lower left--hand box on the display screen. The function of SOFT KEY 2 matches the word in the lower right--hand box on the display screen. If the box is empty, then the SOFT KEY does not have a function on that specific screen. The UP and DOWN keys are used to navigate through the menus. The OFF key is used to turn off the VFD. The AUTO key is used to change control of the drive to automatic control. The HAND key is used to change control of the drive to local (hand held) control. The HELP button is used to access the help screens.

For the VFD to operate on the units covered by this document, the drive must be set in AUTO mode. The word

“AUTO” will appear in the upper left hand corner of the

VFD display. Press the AUTO button to set the drive in

AUTO mode.

C08675

Fig. 73 -- VFD Keypad

Use the RJ--45 (CAT5) cable (bundled with the Control

Harness -- see Fig. 74) to provide easier access for using the

VFD Remote Keypad. The cable’s length is long enough to route it through to the unit’s control box, if desired.

To Connect the VFD Keypad using the RJ--45 Cable —

1. Remove the Keypad from the front of the VFD.

2. Remove the RJ--45 adapter from the back of the Remote Keypad and insert the adapter into the RJ--45 port on the front of the VFD.

3. Separate the RJ--45 (CAT5) cable from the Control

Harness.

4. Use the CAT5 cable to connect the Remote Keypad to the VFD.

RJ-45 (CAT5) Cable

(Bundled with Control Harness)

ABB VFD w/ Remote Keypad

Fig. 74 -- Location of VFD in 48LC 04--06 Units

C13394

Start Up with Assistant

Initial start--up has been performed at the factory. Use of the start up assistant will override factory VFD configurations.

DO NOT USE THE START--UP ASSISTANT ON THESE

LC UNITS!

Start Up by Changing Parameters Individually

Initial start--up is performed at the factory. To start up the

VFD by changing individual parameters, perform the following procedure:

1. Select MENU (SOFT KEY 2). The Main menu will be displayed.

2. Use the UP or DOWN keys to highlight PARAMET-

ERS on the display screen and press ENTER (SOFT

KEY 2).

3. Use the UP or DOWN keys to highlight the desired parameter group and press SEL (SOFT KEY 2).

4. Use the UP or DOWN keys to highlight the desired parameter and press EDIT (SOFT KEY 2).

5. Use the UP or DOWN keys to change the value of the parameter.

6. Press SAVE (SOFT KEY 2) to store the modified value. Press CANCEL (SOFT KEY 1) to keep the previous value. Any modifications that are not saved will not be changed.

7. Choose another parameter or press EXIT (SOFT KEY

1) to return to the listing of parameter groups. Continue until all the parameters have been configured and then press EXIT (SOFT KEY 1) to return to the main menu.

NOTE: The current parameter value appears above the

highlight parameter. To view the default parameter value, press the UP and DOWN keys simultaneously. To restore the default factory settings, select the application macro

“HVAC Default.”

VFD Modes

The VFD has several different modes for configuring, operating, and diagnosing the VFD. The modes are:

Standard Display mode  shows drive status information and operates the drive

Parameters mode  edits parameter values individually

Start--up Assistant mode  guides the start up and configuration. DO NOT USE THE START--UP

ASSISTANT ON THESE LC UNITS!

Changed Parameters mode  shows all changed parameters

Drive Parameter Backup mode  stores or uploads the parameters

Clock Set mode  sets the time and date for the drive

I/O Settings mode  checks and edits the I/O settings

Standard Display Mode

Use the standard display mode to read information on the drive status and operate the drive. To reach the standard display mode, press EXIT until the LCD display shows status information as described below. (See Fig. 75.)

The top line of the LCD display shows the basic status information of the drive. The HAND icon indicates that the drive control is local from the control panel. The

AUTO icon indicates that the drive is in remote control mode, such as the basic I/O or field bus.

The arrow icon indicates the drive and motor rotation status. A rotating arrow (clockwise or counterclockwise) indicates that the drive is running and at set point and the shaft direction is forward or reverse. A rotating blinking arrow indicates that the drive is running but not at set point. A stationary arrow indicates that the drive is stopped. For the units covered in this manual, the correct display rotation is clockwise.

The upper right corner shows the frequency set point that the drive will maintain.

Using parameter group 34, the middle of the LCD display can be configured to display 3 parameter values. The default display shows parameters 0103 (OUTPUT FREQ) in percent speed, 0104 (CURRENT) in amperes, and 0120

(Al1) in voltage DC.

The bottom corners of the LCD display show the functions currently assigned to the two soft keys. The lower middle displays the current time (if configured to show the time).

The first time the drive is powered up, it is in the OFF mode. To switch to local hand--held control and control the drive using the control panel, press and hold the

HAND button. Pressing the HAND button switches the drive to hand control while keeping the drive running.

Press the AUTO button to switch to remote input control.

To start the drive press the HAND or AUTO buttons, to stop the drive press the OFF button.

100.0 %SP

1.9 A

10.0 Vdc

60.0Hz

C09249

Fig. 75 -- Standard Display Example

To adjust the speed in HAND mode, press the UP or

DOWN buttons (the reference changes immediately). The reference can be modified in the local control (HAND) mode, and can be parameterized (using Group 11 reference select) to also allow modification in the remote control mode.

Parameters Mode

The Parameters mode is used to change the parameters on the drive. To change parameters, perform the following procedure. See Table 10 for a listing of the VFD parameters per motor and VFD drive models:

1. Select MENU (SOFT KEY 2). The Main menu will be displayed.

2. Use the UP or DOWN keys to highlight PARAMET-

ERS on the display screen and press ENTER (SOFT

KEY 2).

3. Use the UP or DOWN keys to highlight the desired parameter group and press SEL (SOFT KEY 2).

4. Use the UP or DOWN keys to highlight the desired parameter and press EDIT (SOFT KEY 2).

5. Use the UP or DOWN keys to change the value of the parameter.

6. Press SAVE (SOFT KEY 2) to store the modified value. Press CANCEL (SOFT KEY 1) to keep the previous value. Any modifications that are not saved will not be changed.

7. Choose another parameter or press EXIT (SOFT KEY

1) to return to the listing of parameter groups. Continue until all the parameters have been configured and then press EXIT (SOFT KEY 1) to return to the main menu.

NOTE: The current parameter value appears above the

highlight parameter. To view the default parameter value, press the UP and DOWN keys simultaneously. To restore the default factory settings, select the Carrier application macro.

Changed Parameters Mode

The Changed Parameters mode is used to view and edit recently changed parameters on the drive. To view the changed parameters, perform the following procedure:

1. Select MENU (SOFT KEY 2). The Main menu will be displayed.

2. Use the UP or DOWN keys to highlight CHANGED

PAR on the display screen and press ENTER (SOFT

KEY 2). A list of the recently changed parameters will be displayed.

3. Use the UP or DOWN keys to highlight the desired parameter group and press EDIT (SOFT KEY 2) to change the parameter if desired.

4. Press EXIT (SOFT KEY 1) to exit the Changed Parameters mode.

Drive Parameter Backup Mode

The drive parameter back up mode is used to export the parameters from one drive to another. The parameters can be uploaded from a VFD to the removable control panel.

The control panel can then be transferred to another drive and the parameters downloaded into memory.

Depending on the motor and application, there are two options available. The first option is to download all parameters. This copies both application and motor parameters to the drive from the control panel. This is recommended when using the same application for drives of the same size. This can also be used to create a backup of the parameters group for the drive.

The second option downloads only the application parameters to the drive. This is recommended when using the same application for drives of different sizes.

Upload All Parameters —

To upload and store parameters in the control panel from the VFD, perform the following procedure:

1. Select MENU (SOFT KEY 2). The Main menu will be displayed.

2. Use the UP or DOWN keys to highlight PAR

BACKUP on the display screen and press ENTER

(SOFT KEY 2).

3. Use the UP or DOWN keys to highlight UPLOAD TO

PANEL and press SEL (SOFT KEY 2).

4. The text “Copying Parameters” will be displayed with a progress indicator. To stop the process, select

ABORT (SOFT KEY 1).

5. When the upload is complete, the text “Parameter upload successful” will be displayed.

6. The display will then return to the PAR BACKUP menu. Select EXIT (SOFT KEY 1) to return to the main menu.

7. The control panel can now be disconnected from the drive.

Download All Parameters —

To download all parameters from the control panel to the

VFD, perform the following procedure:

1. Install the control panel with the correct parameters onto the VFD.

2. Select MENU (SOFT KEY 2). The Main menu will be displayed.

3. Use the UP or DOWN keys to highlight PAR

BACKUP on the display screen and press ENTER

(SOFT KEY 2).

4. Use the UP or DOWN keys to highlight DOWNLOAD

TO DRIVE ALL and press SEL (SOFT KEY 2).

5. The text “Restoring Parameters” will be displayed with a progress indicator. To stop the process, select

ABORT (SOFT KEY 1).

6. When the download is complete, the text “Parameter download successful” will be displayed.

7. The display will then return to the PAR BACKUP menu. Select EXIT (SOFT KEY 1) to return to the main menu.

8. The control panel can now be disconnected from the drive.

Download Application Parameters —

To download application parameters only to the control panel from the VFD, perform the following procedure:

1. Install the control panel with the correct parameters onto the VFD.

2. Select MENU (SOFT KEY 2). The Main menu will be displayed.

3. Use the UP or DOWN keys to highlight PAR

BACKUP on the display screen and press ENTER

(SOFT KEY 2).

4. Use the UP or DOWN keys to highlight DOWNLOAD

APPLICATION and press SEL (SOFT KEY 2).

5. The text “Downloading Parameters (partial)” will be displayed with a progress indicator. To stop the process, select ABORT (SOFT KEY 1).

6. When the download is complete, the text “Parameter download successful” will be displayed.

7. The display will then return to the PAR BACKUP menu. Select EXIT (SOFT KEY 1) to return to the main menu.

8. The control panel can now be disconnected from the drive.

Clock Set Mode

The clock set mode is used for setting the date and time for the internal clock of the VFD. In order to use the timer functions of the VFD control, the internal clock must be set. The date is used to determine weekdays and is visible in the fault logs.

To set the clock, perform the following procedure:

1. Select MENU (SOFT KEY 2). The Main menu will be displayed.

2. Use the UP or DOWN keys to highlight CLOCK SET on the display screen and press ENTER (SOFT KEY

2). The clock set parameter list will be displayed.

3. Use the UP or DOWN keys to highlight CLOCK VIS-

IBILITY and press SEL (SOFT KEY 2). This parameter is used to display or hide the clock on the screen. Use the UP or DOWN keys to change the parameter setting. Press OK (SOFT KEY 2) to save the configuration and return to the Clock Set menu.

4. Use the UP or DOWN keys to highlight SET TIME and press SEL (SOFT KEY 2). Use the UP or DOWN keys to change the hours and minutes. Press OK

(SOFT KEY 2) to save the configuration and return to the Clock Set menu.

5. Use the UP or DOWN keys to highlight TIME

FORMAT and press SEL (SOFT KEY 2). Use the UP or DOWN keys to change the parameter setting. Press

OK (SOFT KEY 2) to save the configuration and return to the Clock Set menu.

6. Use the UP or DOWN keys to highlight SET DATE and press SEL (SOFT KEY 2). Use the UP or DOWN keys to change the day, month, and year. Press OK

(SOFT KEY 2) to save the configuration and return to the Clock Set menu.

7. Use the UP or DOWN keys to highlight DATE

FORMAT and press SEL (SOFT KEY 2). Use the UP or DOWN keys to change the parameter setting. Press

OK (SOFT KEY 2) to save the configuration and return to the Clock Set menu.

8. Press EXIT (SOFT KEY 1) twice to return to the main menu.

I/O Settings Mode

The I/O Settings mode is used for viewing and editing the

I/O settings.

To configure the I/O settings, perform the following procedure:

1. Select MENU (SOFT KEY 2). The Main menu will be displayed.

2. Use the UP or DOWN keys to highlight I/O SET-

TINGS on the display screen and press ENTER

(SOFT KEY 2). The I/O Settings parameter list will be displayed.

3. Use the UP or DOWN keys to highlight the desired

I/O setting and press SEL (SOFT KEY 2).

4. Use the UP or DOWN keys to select the parameter to view. Press OK (SOFT KEY 2).

5. Use the UP or DOWN keys to change the parameter setting. Press SAVE (SOFT KEY 2) to save the configuration. Press CANCEL (SOFT KEY 1) to keep the previous value. Any modifications that are not saved will not be changed.

6. Press EXIT (SOFT KEY 1) twice to return to the main menu.

Parameter

Group

Start---Up Data

Start/Stop/Dir

Reference

Select

Constant

Speeds

Analog Inputs

Relay Outputs

System

Control

Override

Limits

Start/Stop

Accel/Decel

Motor

Fault

Functions

Automatic

Reset

EFB Protocol

Options

Parameter

Number

Unit Size

Motor Description

Drive/Motor Voltage

Motor Part Number

VFD Part Number

ABB Part Number

Minimum Frequency

Maximum Frequency

Start Function

Stop Function

EM STOP Sel

Acc/Dec 1/2 Sel

Accelerate Time

Decelerate Time

Switching Frequency

Control

Motor Therm Prot

Motor Thermal Time

Motor Load Curve

Zero Speed Load

Break Point

Frequency

AR Overcurrent

AR Overvoltage

AR Undervoltage

EFB PROTOCOL ID

EFB STATION ID

EFB BAUD RATE

EFB PARITY

EFB CTRL PROFILE

COMM PROT SEL

Application Macro

Motor

Nominal Voltage

Motor

Nominal Current

Motor

Nominal Frequency

Motor

Nominal Speed

Motor

Nominal Power

EXT1 Commands

Direction

REF1 Select

REF1 Minimum

REF1 Maximum

Constant Speed

Select

Constant Speed 1

Constant Speed 2

Constant Speed 3

Minimum AI--- 1

Maximum AI--- 1

Relay Output 1

Relay Output 2

Relay Output 3

Fault Reset Sel

Start Enable 1

Override Sel

Maximum Current

9908

9909

1001

1003

1103

1104

1105

1201

1401

1402

1403

1604

1608

1701

2003

1202

1203

1204

1301

1302

2007

2008

2101

2102

2109

2201

2202

2203

2606

2607

3005

3006

3007

3008

3009

3104

3105

3106

5301

5302

5303

5304

5305

9802

9902

9905

9906

9907

Table 10 – 48LC 04--06 VFD Parameters

1.7 HP 575V

575V

HD56FR579

HK30WA048

ACH550--- CARUH

--- 03A9--- 6

(1) HVAC DEFAULT

575

1.7 HP 208--- 230V

208--- 230V

HD56FR233

HK30WA045

ACH550--- CARUH

--- 07A5--- 2

(1) HVAC DEFAULT

230

48LC 04

1.7 HP 460V

460V

HD56FR463

HK30WA046

ACH550--- CARUH

--- 04A1--- 4

(1) HVAC DEFAULT

460

3.1

5.8

2.9

1725

1.7

(1) DI1

(1) Forward

(1) AI1

0 Hz

60 Hz

(8) DI2,3

52.4

60Hz

20.00%

100.00%

(1) Ready

(2) Run

(16) FLT/ALARM

(0) Keypad

(4) DI4

(0) NOT SEL

3.6

0.0 Hz

60Hz

(1) AUTO

(1) Coast

(0) NOT SEL

30.0s

10.0s

4 KHz

(1) ON

(1) Fault

1050s

100%

%00705

35 Hz

(0) DISABLE

(1) ENABLE

0601 (hex)

38400

8 NONE 1

DCU PROFILE

6 (LEN)

1725

1.7

(1) DI1

(1) Forward

(1) AI1

0 Hz

60 Hz

(8) DI2,3

52.4

60Hz

20.00%

100.00%

(1) Ready

(2) Run

(16) FLT/ALARM

(0) Keypad

(4) DI4

(0) NOT SEL

6.7

0.0 Hz

60Hz

(1) AUTO

(1) Coast

(0) NOT SEL

30.0s

10.0s

4 KHz

(1) ON

(1) Fault

1050s

100%

%00705

35 Hz

(0) DISABLE

(1) ENABLE

0601 (hex)

38400

8 NONE 1

DCU PROFILE

6 (LEN)

1725

1.7

(1) DI1

(1) Forward

(1) AI1

0 Hz

60 Hz

(8) DI2,3

52.4

60Hz

20.00%

100.00%

(1) Ready

(2) Run

(16) FLT/ALARM

(0) Keypad

(4) DI4

(0) NOT SEL

3.3

0.0 Hz

60Hz

(1) AUTO

(1) Coast

(0) NOT SEL

30.0s

10.0s

4 KHz

(1) ON

(1) Fault

1050s

100%

%00705

35 Hz

(0) DISABLE

(1) ENABLE

0601 (hex)

38400

8 NONE 1

DCU PROFILE

6 (LEN)

2.4 HP 208--- 230V

208--- 230V

HD56FE653

HK30WA001

ACH550--- CARUH

--- 012A--- 2

(1) HVAC DEFAULT

230

7.9

1725

2.4

(1) DI1

(1) Forward

(1) AI1

0 Hz

60 Hz

(8) DI2,3

52.4

60Hz

20.00%

100.00%

(1) Ready

(2) Run

(16) FLT/ALARM

(0) Keypad

(4) DI4

(0) NOT SEL

9.1

0.0 Hz

60Hz

(1) AUTO

(1) Coast

(0) NOT SEL

30.0s

10.0s

4 KHz

(1) ON

(1) Fault

1050s

100%

%00705

35 Hz

(0) DISABLE

(1) ENABLE

0601 (hex)

38400

8 NONE 1

DCU PROFILE

6 (LEN)

2.4 HP 575V

575V

HD56FE577

HK30WA048

ACH550--- CARUH

--- 03A9--- 6

(1) HVAC DEFAULT

575

3.4

1725

2.4

(1) DI1

(1) Forward

(1) AI1

0 Hz

60 Hz

(8) DI2,3

52.4

60Hz

20.00%

100.00%

(1) Ready

(2) Run

(16) FLT/ALARM

(0) Keypad

(4) DI4

(0) NOT SEL

3.9

0.0 Hz

60Hz

(1) AUTO

(1) Coast

(0) NOT SEL

30.0s

10.0s

4 KHz

(1) ON

(1) Fault

1050s

100%

%00705

35 Hz

(0) DISABLE

(1) ENABLE

0601 (hex)

38400

8 NONE 1

DCU PROFILE

6 (LEN)

Parameter

Group

Start---Up Data

Start/Stop/Dir

Reference

Select

Constant

Speeds

Analog Inputs

Relay Outputs

System

Control

Override

Limits

Start/Stop

Accel/Decel

Motor

Fault

Functions

Automatic

Reset

EFB Protocol

Options

9902

9905

9906

9907

9908

9909

1001

1003

1103

1104

1105

1201

1401

1402

1403

1604

1608

1701

2003

1202

1203

1204

1301

1302

2007

2008

2101

2102

2109

2201

2202

2203

2606

2607

3005

3006

3007

3008

3009

3104

3105

3106

5301

5302

5303

5304

5305

9802

Parameter

Number

2.4

(1) DI1

(1) Forward

(1) AI1

0 Hz

60 Hz

(8) DI2,3

52.4

60Hz

20.00%

100.00%

(1) Ready

(2) Run

(16) FLT/ALARM

(0) Keypad

(4) DI4

(0) NOT SEL

4.6

0.0 Hz

60Hz

(1) AUTO

(1) Coast

(0) NOT SEL

30.0s

10.0s

4 KHz

(1) ON

(1) Fault

1050s

100%

%00705

35 Hz

(0) DISABLE

(1) ENABLE

0601 (hex)

38400

8 NONE 1

DCU PROFILE

6 (LEN)

Unit Size

Motor Description

Drive/Motor Voltage

Motor Part Number

VFD Part Number

ABB Part Number

Minimum Frequency

Maximum Frequency

Start Function

Stop Function

EM STOP Sel

Acc/Dec 1/2 Sel

Accelerate Time

Decelerate Time

Switching Frequency

Control

Motor Therm Prot

Motor Thermal Time

Motor Load Curve

Zero Speed Load

Break Point

Frequency

AR Overcurrent

AR Overvoltage

AR Undervoltage

EFB PROTOCOL ID

EFB STATION ID

EFB BAUD RATE

EFB PARITY

EFB CTRL PROFILE

COMM PROT SEL

Application Macro

Motor

Nominal Voltage

Motor

Nominal Current

Motor

Nominal Frequency

Motor

Nominal Speed

Motor

Nominal Power

EXT1 Commands

Direction

REF1 Select

REF1 Minimum

REF1 Maximum

Constant Speed

Select

Constant Speed 1

Constant Speed 2

Constant Speed 3

Minimum AI--- 1

Maximum AI--- 1

Relay Output 1

Relay Output 2

Relay Output 3

Fault Reset Sel

Start Enable 1

Override Sel

Maximum Current

Table 10 -- 48LC 04--06 VFD Parameters (cont.)

48LC 04

2.4 HP 460V

460V

HD56FE653

HK30WA008

ACH550--- CARUH

--- 06A9--- 4

(1) HVAC DEFAULT

460

4.0

1725

1.7 HP 575V

575V

HD56FR579

HK30WA048

ACH550--- CARUH

--- 03A9--- 6

(1) HVAC DEFAULT

575

3.1

1725

48LC 05

1.7 HP 208--- 230V

208--- 230V

HD56FR233

HK30WA045

ACH550--- CARUH

--- 07A5--- 2

(1) HVAC DEFAULT

230

5.8

1725

1.7

(1) DI1

(1) Forward

(1) AI1

0 Hz

60 Hz

(8) DI2,3

42.6

60Hz

20.00%

100.00%

(1) Ready

(2) Run

(16) FLT/ALARM

(0) Keypad

(4) DI4

(0) NOT SEL

3.6

0.0 Hz

60Hz

(1) AUTO

(1) Coast

(0) NOT SEL

30.0s

10.0s

4 KHz

(1) ON

(1) Fault

1050s

100%

%00705

35 Hz

(0) DISABLE

(1) ENABLE

0601 (hex)

38400

8 NONE 1

DCU PROFILE

6 (LEN)

1.7

(1) DI1

(1) Forward

(1) AI1

0 Hz

60 Hz

(8) DI2,3

42.6

60Hz

20.00%

100.00%

(1) Ready

(2) Run

(16) FLT/ALARM

(0) Keypad

(4) DI4

(0) NOT SEL

6.7

0.0 Hz

60Hz

(1) AUTO

(1) Coast

(0) NOT SEL

30.0s

10.0s

4 KHz

(1) ON

(1) Fault

1050s

100%

%00705

35 Hz

(0) DISABLE

(1) ENABLE

0601 (hex)

38400

8 NONE 1

DCU PROFILE

6 (LEN)

48LC 06

2.4 HP 575V

575V

HD56FE577

HK30WA048

ACH550--- CARUH

--- 03A9--- 6

(1) HVAC DEFAULT

575

3.4

1725

2.4

(1) DI1

(1) Forward

(1) AI1

0 Hz

60 Hz

(8) DI2,3

42.6

60Hz

20.00%

100.00%

(1) Ready

(2) Run

(16) FLT/ALARM

(0) Keypad

(4) DI4

(0) NOT SEL

3.9

0.0 Hz

60Hz

(1) AUTO

(1) Coast

(0) NOT SEL

30.0s

10.0s

4 KHz

(1) ON

(1) Fault

1050s

100%

%00705

35 Hz

(0) DISABLE

(1) ENABLE

0601 (hex)

38400

8 NONE 1

DCU PROFILE

6 (LEN)

1.7 HP 460V

460V

HD56FR463

HK30WA046

ACH550--- CARUH

--- 04A1--- 4

(1) HVAC DEFAULT

460

2.9

1725

1.7

(1) DI1

(1) Forward

(1) AI1

0 Hz

60 Hz

(8) DI2,3

42.6

60Hz

20.00%

100.00%

(1) Ready

(2) Run

(16) FLT/ALARM

(0) Keypad

(4) DI4

(0) NOT SEL

3.3

0.0 Hz

60Hz

(1) AUTO

(1) Coast

(0) NOT SEL

30.0s

10.0s

4 KHz

(1) ON

(1) Fault

1050s

100%

%00705

35 Hz

(0) DISABLE

(1) ENABLE

0601 (hex)

38400

8 NONE 1

DCU PROFILE

6 (LEN)

Parameter

Group

Start---Up Data

Start/Stop/Dir

Reference

Select

Constant

Speeds

Analog Inputs

Relay Outputs

System

Control

Override

Limits

Start/Stop

Accel/Decel

Motor

Fault

Functions

Automatic

Reset

EFB Protocol

Options

9902

9905

9906

9907

9908

9909

1001

1003

1103

1104

1105

1201

1401

1402

1403

1604

1608

1701

2003

1202

1203

1204

1301

1302

2007

2008

2101

2102

2109

2201

2202

2203

2606

2607

3005

3006

3007

3008

3009

3104

3105

3106

5301

5302

5303

5304

5305

9802

Parameter

Number

2.4

(1) DI1

(1) Forward

(1) AI1

0 Hz

60 Hz

(8) DI2,3

42.6

60Hz

20.00%

100.00%

(1) Ready

(2) Run

(16) FLT/ALARM

(0) Keypad

(4) DI4

(0) NOT SEL

9.1

0.0 Hz

60Hz

(1) AUTO

(1) Coast

(0) NOT SEL

30.0s

10.0s

4 KHz

(1) ON

(1) Fault

1050s

100%

%00705

35 Hz

(0) DISABLE

(1) ENABLE

0601 (hex)

38400

8 NONE 1

DCU PROFILE

6 (LEN)

Unit Size

Motor Description

Drive/Motor Voltage

Motor Part Number

VFD Part Number

ABB Part Number

Minimum Frequency

Maximum Frequency

Start Function

Stop Function

EM STOP Sel

Acc/Dec 1/2 Sel

Accelerate Time

Decelerate Time

Switching Frequency

Control

Motor Therm Prot

Motor Thermal Time

Motor Load Curve

Zero Speed Load

Break Point

Frequency

AR Overcurrent

AR Overvoltage

AR Undervoltage

EFB PROTOCOL ID

EFB STATION ID

EFB BAUD RATE

EFB PARITY

EFB CTRL PROFILE

COMM PROT SEL

Application Macro

Motor

Nominal Voltage

Motor

Nominal Current

Motor

Nominal Frequency

Motor

Nominal Speed

Motor

Nominal Power

EXT1 Commands

Direction

REF1 Select

REF1 Minimum

REF1 Maximum

Constant Speed

Select

Constant Speed 1

Constant Speed 2

Constant Speed 3

Minimum AI--- 1

Maximum AI--- 1

Relay Output 1

Relay Output 2

Relay Output 3

Fault Reset Sel

Start Enable 1

Override Sel

Maximum Current

Table 10 -- 48LC 04--06 VFD Parameters (cont.)

2.4 HP 208--- 230V

48LC 06

208--- 230V

HD56FE653

HK30WA001

ACH550--- CARUH

--- 012A--- 2

(1) HVAC DEFAULT

2.4 HP 460V

460V

HD56FE653

HK30WA008

ACH550--- CARUH

--- 06A9--- 4

(1) HVAC DEFAULT

230 460

7.9

1725

4.0

1725

2.9 HP 208--- 230V

208--- 230V

HD58FE654

HK30WA001

ACH550--- CARUH

--- 012A--- 2

(1) HVAC DEFAULT

230

9.2

1725

2.4

(1) DI1

(1) Forward

(1) AI1

0 Hz

60 Hz

(8) DI2,3

42.6

60Hz

20.00%

100.00%

(1) Ready

(2) Run

(16) FLT/ALARM

(0) Keypad

(4) DI4

(0) NOT SEL

4.6

0.0 Hz

60Hz

(1) AUTO

(1) Coast

(0) NOT SEL

30.0s

10.0s

4 KHz

(1) ON

(1) Fault

1050s

100%

%00705

35 Hz

(0) DISABLE

(1) ENABLE

0601 (hex)

38400

8 NONE 1

DCU PROFILE

6 (LEN)

2.9

(1) DI1

(1) Forward

(1) AI1

0 Hz

60 Hz

(8) DI2,3

41.2

60Hz

20.00%

100.00%

(1) Ready

(2) Run

(16) FLT/ALARM

(0) Keypad

(4) DI4

(0) NOT SEL

10.6

0.0 Hz

60Hz

(1) AUTO

(1) Coast

(0) NOT SEL

30.0s

10.0s

4 KHz

(1) ON

(1) Fault

1050s

100%

%00705

35 Hz

(0) DISABLE

(1) ENABLE

0601 (hex)

38400

8 NONE 1

DCU PROFILE

6 (LEN)

3.7 HP 575V

575V

HD58FE577

HK30WA021

ACH550--- CARUH

--- 06A1--- 6

(1) HVAC DEFAULT

575

4.2

1725

3.7

(1) DI1

(1) Forward

(1) AI1

0 Hz

60 Hz

(8) DI2,3

41.2

60Hz

20.00%

100.00%

(1) Ready

(2) Run

(16) FLT/ALARM

(0) Keypad

(4) DI4

(0) NOT SEL

4.8

0.0 Hz

60Hz

(1) AUTO

(1) Coast

(0) NOT SEL

30.0s

10.0s

4 KHz

(1) ON

(1) Fault

1050s

100%

%00705

35 Hz

(0) DISABLE

(1) ENABLE

0601 (hex)

38400

8 NONE 1

DCU PROFILE

6 (LEN)

48LC 05/06

2.9 HP 460V

460V

HD58FE654

HK30WA008

ACH550--- CARUH

--- 06A9--- 4

(1) HVAC DEFAULT

460

4.6

1725

2.9

(1) DI1

(1) Forward

(1) AI1

0 Hz

60 Hz

(8) DI2,3

41.2

60Hz

20.00%

100.00%

(1) Ready

(2) Run

(16) FLT/ALARM

(0) Keypad

(4) DI4

(0) NOT SEL

5.3

0.0 Hz

60Hz

(1) AUTO

(1) Coast

(0) NOT SEL

30.0s

10.0s

4 KHz

(1) ON

(1) Fault

1050s

100%

%00705

35 Hz

(0) DISABLE

(1) ENABLE

0601 (hex)

38400

8 NONE 1

DCU PROFILE

6 (LEN)

VFD Diagnostics

The drive detects error situations and reports them using:

1. Green and red LEDs on the body of the drive (located under the keypad)

2. Status LED on the control panel

3. Control panel display

4. The Fault Word and Alarm Word parameter bits

(parameters 0305 to 0309)

The form of the display depends on the severity of the error. The user can specify the severity for many errors by directing the drive to ignore the error situation, report the situation as an alarm, or report the situation as a fault.

Faults (Red LED Lit)

The VFD signals that it has detected a severe error, or fault, by:

1. Enabling the red LED on the drive (LED is either steady or flashing)

2. Setting an appropriate bit in a Fault Word parameter

(0305 to 0307)

3. Overriding the control panel display with the display of a fault code

4. Stopping the motor (if it was on)

5. Sets an appropriate bit in Fault Word parameter

0305-- 0307.

The fault code on the control panel display is temporary.

Pressing the MENU, ENTER, UP button or DOWN buttons removes the fault message. The message reappears after a few seconds if the control panel is not touched and the fault is still active.

Alarms (Green LED Flashing)

For less severe errors, called alarms, the diagnostic display is advisory. For these situations, the drive is simply reporting that it had detected something unusual.

In these situations, the drive:

1. Flashes the green LED on the drive (does not apply to alarms that arise from control panel operation errors)

2. Sets an appropriate bit in an Alarm Word parameter

(0308 or 0309)

3. Overrides the control panel display with the display of an alarm code and/or name

Alarm messages disappear from the control panel display after a few seconds. The message returns periodically as long as the alarm condition exists.

Correcting Faults

The recommended corrective action for faults is shown in the Fault Listing Table 11. The VFD can also be reset to remove the fault. If an external source for a start command is selected and is active, the VFD may start immediately after fault reset.

To reset a fault indicated by a flashing red LED, turn off the power for 5 minutes. To reset a fault indicated by a red

LED (not flashing), press RESET from the control panel or turn off the power for 5 minutes. Depending on the value of parameter 1604 (FAULT RESET SELECT), digital input or serial communication could also be used to reset the drive. When the fault has been corrected, the motor can be started.

History

For reference, the last three fault codes are stored into parameters 0401, 0412, 0413. For the most recent fault

(identified by parameter 0401), the drive stores additional data (in parameters 0402 through 0411) to aid in troubleshooting a problem. For example, a parameter

0404 stores the motor speed at the time of the fault. To clear the fault history (all of Group 04, Fault History parameters), follow these steps:

1. In the control panel, Parameters mode, select parameter 0401.

2. Press EDIT.

3. Press the UP and DOWN buttons simultaneously.

4. Press SAVE.

Correcting Alarms

To correct alarms, first determine if the Alarm requires any corrective action (action is not always required). Use

Table 12 to find and address the root cause of the problem.

If diagnostics troubleshooting has determined that the drive is defective during the warranty period, contact ABB

Automation Inc., at 1--800--435--7365, option 4, option 3. A qualified technician will review the problem with the caller and make a determination regarding how to proceed. This may involve dispatching a designated service station (DSS) representative from an authorized station, dispatching a replacement unit, or advising return for repair.

Control Panel Cleaning

Use a soft damp cloth to clean the control panel. Avoid harsh cleaners which could scratch the display window.

Battery Replacement

A battery is only used in assistant control panels that have the clock function available and enabled. The battery keeps the clock operating in memory during power interruptions. The expected life for the battery is greater than ten years. To remove the battery, use a coin to rotate the battery holder on the back of the control panel.

Replace the battery with type CR2032.

FAULT

CODE

Table 11 – FAULT CODES

1006

1007

1008

1009

FAULT

CODE

1000

1001

1002

1003

1004

1005

1010

Table 11 — FAULT CODES (cont)

FAULT NAME IN PANEL

PAR HZRPM

PAR PFA REFNG

PAR PFA IOCNF

PAR AI SCALE

PAR AO SCALE

PAR PCU 2

PAR EXT RO

PAR FBUS

PAR PFA MODE

PAR PCU 1

OVERRIDE/PFA

CONFLICT

DESCRIPTION AND RECOMMENDED CORRECTIVE ACTION

Parameter values are inconsistent. Check for any of the following:

2001 MINIMUM SPEED > 2002 MAXIMUM SPEED

2007 MINIMUM FREQ > 2008 MAXIMUM FREQ

2001 MINIMUM SPEED / 9908 MOTOR NOM SPEED is outside of the range: ---128/+128

2002 MAXIMUM SPEED / 9908 MOTOR NOM SPEED is outside of the range: ---128/+128

2007 MINIMUM FREQ / 9907 MOTOR NOM FREQ is outside of the range: --- 128/+128

2008 MAXIMUM FREQ / 9907 MOTOR NOM FREQ is outside of the range: --- 128/+128

Parameter values are inconsistent. Check that 2007 MINIMUM FREQ is negative, when 8123 PFA ENABLE is active.

Parameter values are inconsistent. The number of programmed PFA relays does not match with Interlock configuration, when 8123 PFA ENABLE is active. Check consistency of RELAY OUTPUT parameters 1401 through

1403, and 1410 through 1412. Check 8117 NR OF AUX MOTORS, 8118 AUTOCHANGE INTERV, and 8120

INTERLOCKS.

Parameter values are inconsistent. Check that parameter 1301 AI 1 MIN > 1302 AI 1 MAX and that parameter 1304 AI

2 MIN > 1305 AI 2 MAX.

Parameter values are inconsistent. Check that parameter 1504 AO 1 MIN > 1505 AO 1 MAX and that parameter 1510

AO 2 MIN > 1511 AO 2 MAX.

Parameter values for power control are inconsistent: Improper motor nominal kVA or motor nominal power. Check the following parameters:

1.1 < (9906 MOTOR NOM CURR * 9905 MOTOR NOM VOLT * 1.73 / PN) < 2.6

Where: PN = 1000 * 9909 MOTOR NOM POWER (if units are kW) or PN = 746

* 9909 MOTOR NOM POWER (if units are HP, e.g., in US)

Parameter values are inconsistent. Check the extension relay module for connection and 1410 through 1412 RELAY

OUTPUTS 4 through 6 have non---zero values.

Parameter values are inconsistent. Check that a parameter is set for field bus control (e.g., 1001 EXT1 COMMANDS

= 10 (COMM)), but 9802 COMM PROT SEL = 0.

Parameter values are inconsistent. The 9904 MOTOR CTRL MODE must = 3 (SCALAR SPEED) when 8123 PFA

ENABLE activated.

Parameter values for power control are inconsistent or improper motor nominal frequency or speed. Check for both of the following:

1 < (60 * 9907 MOTOR NOM FREQ / 9908 MOTOR NOM SPEED < 16

0.8 < 9908 MOTOR NOM SPEED / (120 * 9907 MOTOR NOM FREQ / Motor poles) < 0.992

Override mode is enabled and PFA is activated at the same time. This cannot be done because PFA interlocks cannot be observed in the override mode.

Table 12 – ALARM CODES

ALARM

CODE

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013*

2014

2015

2016

2017*

2018

2019

2020

2021

2022

ALARM NAME

IN PANEL

---

DIR LOCK

I/O COMM

Al1 LOSS

Al2 LOSS

PANEL LOSS

---

MOT OVERTEMP

UNDERLOAD

MOTOR STALL

AUTORESET

AUTOCHANGE

PFA INTERLOCK

---

OFF BUTTON

PID SLEEP

ID RUN

OVERRIDE

START ENABLE 1

MISSING

START ENABLE 2

MISSING

EMERGENCY STOP

DESCRIPTION AND RECOMMENDED CORRECTIVE ACTION

Reserved

The change in direction being attempted is not allowed. Do not attempt to change the direction of motor rotation, or

Change parameter 1003 DIRECTION to allow direction change (if reverse operation is safe).

Field bus communication has timed out. Check fault setup (3018 COMM FAULT FUNC and 3019 COMM FAULT

TIME). Check communication settings (Group 51 or 53 as appropriate). Check for poor connections and/or noise on line.

Analog input 1 is lost, or value is less than the minimum setting. Check input source and connections. Check the parameter that sets the minimum (3021) and the parameter that sets the Alarm/Fault operation (3001).

Analog input 2 is lost, or value is less than the minimum setting. Check input source and connections. Check parameter that sets the minimum (3022) and the parameter that sets the Alarm/Fault operation (3001).

Panel communication is lost and either the VFD is in local control mode (the control panel displays HAND), or the

VFD is in remote control mode (AUTO) and is parameterized to accept start/stop, direction or reference from the control panel. To correct, check the communication lines and connections, Parameter 3002 PANEL LOSS, and parameters in groups 10 COMMAND INPUTS and 11 REFERENCE SELECT (if drive operation is REM).

Reserved

Motor is hot, based on either the VFD estimate or on temperature feedback. This alarm warns that a Motor Overload fault trip may be near. Check for overloaded motor. Adjust the parameters used for the estimate (3005 through 3009).

Check the temperature sensors and Group 35 parameters.

Motor load is lower than expected. This alarm warns that a Motor Underload fault trip may be near. Check that the motor and drive ratings match (motor is NOT undersized for the drive). Check the settings on parameters 3013 to

3015.

Motor is operating in the stall region. This alarm warns that a Motor Stall fault trip may be near.

This alarm warns that the drive is about to perform an automatic fault reset, which may start the motor. To control automatic reset, use parameter group 31 (AUTOMATIC RESET).

This alarm warns that the PFA autochange function is active. To control PFA, use parameter group 81 (PFA) and the

Pump Alternation macro.

This alarm warns that the PFA interlocks are active, which means that the drive cannot start any motor (when

Autochange is used), or a speed regulated motor (when Autochange is not used).

Reserved

This alarm indicates that the OFF button has been pressed.

This alarm warns that the PID sleep function is active, which means that the motor could accelerate when the PID sleep function ends. To control PID sleep, use parameters 4022 through 4026 or 4122 through 4126.

The VFD is performing an ID run.

Override mode is activated.

This alarm warns that the Start Enable 1 signal is missing. To control Start Enable 1 function, use parameter 1608. To correct, check the digital input configuration and the communication settings.

This alarm warns that the Start Enable 2 signal is missing. To control Start Enable 2 function, use parameter1609. To correct, check the digital input configuration and the communication settings.

Emergency stop is activated.

2023

* This alarm is not indicated by a relay output, even when the relay output is configured to indicate alarm conditions, parameter 1401 RELAY OUTPUT = 5

(ALARM) or 16 (FLT/ALARM).

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

Catalog No: 48LC---4---6---02SI

Replaces: 48LC--- 4--- 6--- 01SI

UNIT START-UP CHECKLIST

(Remove and Store in Job File)

MODEL NO.: SERIAL NO.:

I. PRE-START-UP

VERIFY THAT ALL PACKAGING MATERIALS HAVE BEEN REMOVED FROM UNIT j

VERIFY INSTALLATION OF OUTDOOR AIR HOOD j

VERIFY INSTALLATION OF FLUE EXHAUST AND INLET HOOD j

VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS j

VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT j

VERIFY GAS PRESSURE TO UNIT GAS VALVE IS WITHIN SPECIFIED RANGE j

CHECK GAS PIPING FOR LEAKS j

CHECK THAT INDOOR--AIR FILTERS ARE CLEAN AND IN PLACE j

CHECK THAT OUTDOOR AIR INLET SCREENS ARE IN PLACE j

VERIFY THAT UNIT IS LEVEL j

CHECK FAN WHEELS AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND VERIFY

SETSCREW IS TIGHT j

VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED j

VERIFY THAT SCROLL COMPRESSORS ARE ROTATING IN THE CORRECT DIRECTION j

VERIFY INSTALLATION OF THERMOSTAT j

VERIFY THAT CRANKCASE HEATERS HAVE BENN ENERGIZED FOR AT LEAST 24 HOURS

II. START-UP

ELECTRICAL

SUPPLY VOLTAGE L1--L2 L2--L3 L3--L1

COMPRESSOR AMPS 1

COMPRESSOR AMPS 2

SUPPLY FAN AMPS

TEMPERATURES

OUTDOOR--AIR TEMPERATURE

RETURN--AIR TEMPERATURE

COOLING SUPPLY AIR TEMPERATURE

GAS HEAT SUPPLY AIR

PRESSURES

GAS INLET PRESSURE

GAS MANIFOLD PRESSURE STAGE 1

STAGE 2

REFRIGERANT SUCTION CIRCUIT A

CIRCUIT B

REFRIGERANT DISCHARGE CIRCUIT A

CIRCUIT B

F DB (DRY BULB)

F DB

IN. WG

PSIG

F WB (WET BULB) j

VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS

GENERAL

ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS (IF EQUIPPED) j

VERIFY SMOKE DETECTOR UNIT SHUTDOWN BY UTILIZING MAGNET TEST

III. HUMIDIMIZER START-UP

STEPS

1. CHECK CTB FOR JUMPER 5, 6, 7

JUMPER 5, 6, 7 MUST BE CUT AND OPEN j

2. OPEN HUMIDISTAT CONTACTS j

3. START UNIT IN COOLING (CLOSE Y1)

OBSERVE AND RECORD

A. SUCTION PRESSURE

B. DISCHARGE PRESSURE

C. ENTERING AIR TEMPERATURE

PSIG

D. LIQUID LINE TEMPERATURE

AT OUTLET OR REHEAT COIL

E. CONFIRM CORRECT ROTATION FOR COMPRESSOR

F. CHECK FOR CORRECT RAMP--UP OF OUTDOOR FAN MOTOR AS CONDENSER COIL WARMS j

4. CHECK UNIT CHARGE PER CHARGING CHART j

5. SWITCH UNIT TO HIGH--LATENT MODE (SUBCOOLER) BY CLOSING HUMIDISTAT WITH Y1 CLOSED

OBSERVE

A. REDUCTION IN SUCTION PRESSURE (5 TO 7 PSI EXPECTED) j

B. DISCHARGE PRESSURE UNCHANGED j

C. LIQUID TEMPERATURE DROPS TO 50 TO 55_F RANGE j

D. LSV SOLENOID ENERGIZED (VALVE CLOSES) j

6. SWITCH UNIT TO DEHUMID (REHEAT) BY OPENING Y1

OBSERVE

A. SUCTION PRESSURE INCREASES TO NORMAL COOLING LEVEL j

B. DISCHARGE PRESSURE DECREASES (35 TO 50 PSI) j

C. LIQUID TEMPERATURE RETURNS TO NORMAL COOLING LEVEL j

D. LSV SOLENOID ENERGIZED (VALVE CLOSES) j

E. DSV SOLENOID ENERGIZED, VALVE OPENS j

7. WITH UNIT IN DEHUMID MODE CLOSE W1

COMPRESSOR AND OUTDOOR FAN STOP; LSV AND DSV SOLENOIDS DE--ENERGIZED j

8. OPEN W1 RESTORE UNIT TO DEHUMID MODE j

9. OPEN HUMIDISTAT INPUT

COMPRESSOR AND OUTDOOR FAN STOP; LSV AND DSV SOLENOIDS DE--ENERGIZED j

10. RESTORE SETPOINTS FOR THERMOSTAT AND HUMIDISTAT

REPEAT PROCESS FOR 2 COMPRESSOR SYSTEMS

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

Catalog No: 48LC---4---6---02SI

Replaces: 48LC--- 4--- 6--- 01SI

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Key features

Gas Heating/Electric Cooling
Puron® (R-410A) Refrigerant
Roof Mount, Curb Mount, Slab Mount
Economizer Hood
Thru-Base Connections
Hinged Panels
Smoke Detector/Fire Shutdown
Humidi-MiZer®
ComfortLINK

Frequently asked questions

This document provides detailed instructions for installing the unit on a roof, including information on preparing the roof, installing the curb, and positioning the unit on the curb.

Refer to Figure 3 in the document for minimum clearances required for safe and proper operation of the unit. These clearances include distance from combustible surfaces, unit performance, and service access.

This document provides instructions for installing gas piping to the unit, including options for horizontal, thru-curb, or thru-base connections. Depending on your chosen method, you may need to use a factory-option thru-base connection kit or an accessory kit. Ensure all connections are made according to local and national plumbing and gas codes.

This document provides instructions for making electrical connections to the unit, including information on field power supply and outdoor air enthalpy control.