Carrier Performance 48VL-A Installation Instructions Manual

48VL---A Performancet 14 SEER Single--- Packaged Air Conditioner and Gas Furnace System with Puron® (R ---410A) Refrigerant Single and Three Phase 2 --- 5 N o m i n a l To n s ( S i z e s 2 4 --- 6 0 )

Installation Instructions

NOTE: Read the entire instruction manual before starting the installation. NOTE: Installer: Make sure the Owner’s Manual and Service Instructions are left with the unit after installation.

TABLE OF CONTENTS

PAGE

SAFETY CONSIDERATIONS 1--2.......................

INTRODUCTION 2...................................

RECEIVING AND INSTALLATION 2--12.................

Check Equipment 2..................................

Identify Unit 2....................................

Inspect Shipment 2.................................

Provide Unit Support 2...............................

Roof Curb 2......................................

Slab Mount 2.....................................

Field Fabricate Ductwork 3............................

Provide Clearances 3.................................

Rig and Place Unit 3.................................

Inspection 3......................................

Rigging/Lifting of Unit 3............................

Connect Condensate Drain 9...........................

Install Flue Hood 9...................................

Install Gas Piping 9..................................

Install Duct Connections 10............................

Configuring Units for Downflow (Vertical)

Discharge 10.....................................

Install Electrical Connections 11........................

High--Voltage Connections 11........................

Special Procedures for 208--V Operation 12..............

Control Voltage Connections 12.......................

Standard Connection 12.............................

Heat Anticipator Setting 12..........................

Transformer Protection 12...........................

PRE--START--UP 13...................................

START--UP 13--24.....................................

Check for Refrigerant Leaks 13.........................

Start--Up Heating & Make Adjustments 14................

Check Heating Control 14...........................

Check Gas Input 14................................

Adjust Gas Input 15................................

Check Burner Flame 15.............................

Normal Operation 22...............................

Airflow and Temperature Rise 22......................

Heating Sequence of Operation 22.....................

Limit Switches 22.................................

Rollout Switch 22.................................

Start--Up Cooling & Make Adjustments 22................

Checking Cooling Control Operation 22................

Checking & Adjusting Refrigerant Charge 22............

Indoor Airflow and Airflow Adjustments 23.............

Cooling Sequence of Operation 24.....................

MAINTENANCE 48--51................................

Air Filter 48......................................

Indoor Blower and Motor 48.........................

TROUBLESHOOTING 52..............................

START--UP CHECKLIST 52............................

Improper installation, adjustment, alteration, service maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause death, 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, protective clothing, and work gloves. Have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit. consult local building codes, the current editions of the National Fuel Gas Code (NFGC) NFPA 54/ANSI Z223.1, and the National Electrical Code (NEC) NFPA 70. In Canada refer to the current editions of the National Standards of Canada CAN/CSA--B149.1 and .2 Natural Gas and Propane Installation codes, and Canadian Electrical Code CSA C22.1

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 these

A09033

Fig. 1 -- Unit 48VL--A

(Low NOx Model Available)

Induced Draft (Combustion Air) Blower 49..............

Flue Gas Passageways 49............................

Limit Switch 49...................................

Burner Ignition 49.................................

Main Burners 49...................................

Removal of Gas Train 49............................

Outdoor Coil, Indoor Coil, & Condensate Drain Pan 49....

Outdoor Fan 50...................................

Electrical Controls and Wiring 50.....................

Refrigerant Circuit 51...............................

Gas Input 51......................................

Evaporator Airflow 51..............................

Puron Items 51....................................

SAFETY CONSIDERATIONS

signal words: DANGER, WARNING, and CAUTION. 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

ELECTRICAL SHOCK HAZARD

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

Before installing or servicing system, always turn off main power to system and install lockout tag. There may be more than one disconnect switch. Turn off accessory heater power switch if applicable.

WARNING

48VL--A

FIRE, EXPLOSION, ELECTRICAL SHOCK AND CARBON MONOXIDE POISONING HAZARD

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

A qualified installer or agency must use only factory--authorized kits or accessories when modifying this product.

INTRODUCTION

The 48VL--A unit (see Fig. 1) is a fully self--contained, combination Category I gas heating/electric cooling unit designed for outdoor installation (See Fig. 3 and 4 for unit dimensions). All unit sizes have return and discharge openings for both horizontal and downflow configurations, and are factory shipped with all downflow duct openings covered. Units may be installed either on a rooftop or on a cement slab. (See Fig. 5 for roof curb dimensions). In gas heating mode, this unit is designed for a minimum continuous return--air temperature of 55_F(13_C) db and a maximum continuous return--air temperature of 80_F(27_C) db. Failure to follow these return--air temperature limits may affect reliability of heat exchangers, motors, and other components. Models with an N in the fifth position of the model number are dedicated Low NOx units designed for California installations. These models meet the California maximum oxides of nitrogen (NOx) emissions requirements of 40 nanograms/joule or less as shipped from the factory and must be installed in California Air Quality Management Districts or any other regions in North America where a Low NOx rule exists. NOTE: Low NOx requirements apply only to natural gas installations.

RECEIVING AND INSTALLATION

Step 1 — Check Equipment

Identify Unit

The unit model number and serial number are stamped on the unit information plate. Check this information against shipping papers.

Inspect Shipment

Inspect for shipping damage before removing packaging materials. If unit appears to be damaged or is torn loose from its anchorage, have it examined by transportation inspectors before removal. Forward claim papers directly to transportation company. Manufacturer is not responsible for any damage incurred in transit. Check all items against shipping list. Immediately notify the nearest equipment distribution office if any item is missing. To prevent loss or damage, leave all parts in original packages until installation.

If the unit is to be mounted on a curb in a downflow application, review Step 9 to determine which method is to be used to remove the downflow panels before rigging and lifting into place. The panel removal process may require the unit to be on the ground.

Step 2 — Provide Unit Support

For hurricane tie downs, contact distributor for details and PE (Professional Engineering) Certificate if required.

Roof Curb

Install accessory roof curb in accordance with instructions shipped with curb (See Fig. 5). Install insulation, cant strips, roofing, and flashing. Ductwork must be attached to curb. IMPORTANT: The gasketing of the unit to the roof curb is critical for a water tight seal. Install gasketing material supplied with the roof curb. Improperly applied gasketing also can result in air leaks and poor unit performance. Curb should be level to within 1/4 in. (6 mm). This is necessary for unit drain to function properly. Refer to accessory roof curb installation instructions for additional information as required.

Installation on older “G” series roof curbs.

Two accessory kits are available to aid in installing a new “G” series unit on an old “G” roof curb.

1. Accessory kit number CPADCURB001A00, (small chassis) and accessory kit number CPADCURB002A00, (large chassis) includes roof curb adapter and gaskets for the perimeter seal and duct openings. No additional modifications to the curb are required when using this kit.

2. An alternative to the adapter curb is to modify the existing curb by removing the outer horizontal flange and use accessory kit number CPGSKTKIT001A00 which includes spacer blocks (for easy alignment to existing curb) and gaskets for the perimeter seal and duct openings. This kit is used when existing curb is modified by removing outer horizontal flange.

WARNING

UNITS/STRUCTURAL DAMAGE HAZARD

Failure to follow this caution may result in property damage.

Ensure there is sufficient clearance for saw blade when cutting the outer horizontal flange of the roof curb so there is no damage to the roof or flashing.

Slab Mount

Place the unit on a solid, level pad that is at least 2 in. (51 mm) above grade. The pad should extend approximately 2 in. (51 mm) beyond the casing on all 4 sides of the unit. (See Fig. 2.) Do not secure the unit to the pad except when required by local codes.

2˝

(50.8mm)

OPTIONAL

RETURN

AIR

OPENING

EVAP. COIL COND. COIL

Fig. 2 -- Slab Mounting Details

OPTIONAL

SUPPLY

AIR

OPENING

A07926

Step 3 — Field Fabricate Ductwork

Secure all ducts to roof curb and building structure on vertical discharge units. Do not connect ductwork to unit. For horizontal applications, unit is provided with flanges on the horizontal openings. All ductwork should be secured to the flanges. Insulate and weatherproof all external ductwork, joints, and roof openings with counter flashing and mastic in accordance with applicable codes. Ducts passing through an unconditioned space 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. Read unit rating plate for any required clearances around ductwork. Cabinet return--air static shall not exceed --.25 IN. W.C.

Step 4 — Provide Clearances

IMPORTANT: The unit must be secured to the curb by installing

screws through the bottom of the curb flange and into the unit base rails. When installing large base units onto the common curb, the screws must be installed before allowing the full weight of the unit to rest on the curb. A minimum of six screws are required for large base units. Failure to secure unit properly could result in an unstable unit. See Warning near Rigging/Lifting information and accessory curb instructions for more details. The required minimum operating and service clearances are shown in Fig. 3 and 4. Adequate combustion, ventilation and condenser air must be provided. IMPORTANT: Do not restrict outdoor airflow. An air restriction at either the outdoor--air inlet or the fan discharge may be detrimental to compressor life. The condenser fan pulls air through the condenser coil and discharges it through the top grille. Be sure that the fan discharge does not recirculate to the condenser coil. Do not locate the unit in either a corner or under an overhead obstruction. The minimum clearance under a partial overhang (such as a normal house overhang) is 48--in. (1219 mm) above the unit top. The maximum horizontal extension of a partial overhang must not exceed 48--in. (1219 mm). Do not place the unit where water, ice, or snow from an overhang or roof will damage or flood the unit. Do not install the unit on carpeting or other combustible materials. Slab--mounted units should be at least 2 in. (51 mm) above the highest expected water and runoff levels. Do not use unit if it has been under water.

Step 5 — Rig and Place Unit

Rigging and handling of this equipment can be hazardous for many reasons due to the installation location (roofs, elevated structures, etc.).

Only trained, qualified crane operators and ground support staff should handle and install this equipment.

When working with this equipment, observe precautions in the literature, on tags, stickers, and labels attached to the equipment, and any other safety precautions that might apply.

Training for operators of the lifting equipment should include, but not be limited to, the following:

1. Application of the lifter to the load, and adjustment of the lifts to adapt to various sizes or kinds of loads.

2. Instruction in any special operation or precaution.

3. Condition of the load as it relates to operation of the lifting kit, such as balance, temperature, etc.

Follow all applicable safety codes. Wear safety shoes and work gloves.

Inspection

Prior to initial use, and at monthly intervals, all rigging shackles, clevis pins, and straps should be visually inspected for any damage, evidence of wear, structural deformation, or cracks. Particular attention should be paid to excessive wear at hoist hooking points and load support areas. Materials showing any kind of wear in these areas must not be used and should be discarded.

WARNING

UNIT FALLING HAZARD

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

Never stand beneath rigged units or lift over people.

WARNING

PROPERTY DAMAGE HAZARD

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

When straps are taut, the clevis should be a minimum of 36 in. (914 mm) above the unit top cover.

Rigging/Lifting of Unit (See Fig. 6)

WARNING

UNIT FALLING HAZARD

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

Large base units must be secured to common curb before allowing full weight of unit to rest on curb. Install screws through curb into unit base rails while rigging crane is still supporting unit.

Lifting holes are provided in base rails as shown in Fig. 3 and 4.

1. Leave top shipping skid on the unit for use as a spreader bar to prevent the rigging straps from damaging the unit. If the skid is not available, use a spreader bar of sufficient length to protect the unit from damage.

2. Attach shackles, clevis pins, and straps to the base rails of the unit. Be sure materials are rated to hold the weight of the unit (See Fig. 6).

3. Attach a clevis of sufficient strength in the middle of the straps. Adjust the clevis location to ensure unit is lifted level with the ground.

After the unit is placed on the roof curb or mounting pad, remove the top skid.

48VL--A

A09452

Fig. 3 -- 48VL--A24--36 Unit Dimensions

48VL--A

A09453

Fig. 4 -- 48VL--A42--60 Unit Dimensions

HVAC unit base rails

Anchor screw

Flashing field supplied

Roofing material field supplied

Cant strip field supplied

HVAC unit basepan

Sealing Gasket

Roofcurb

Wood nailer*

Roofcurb*

Insulation (field supplied)

Dashed lines show cross support location for large basepan units.

A09413

*Provided with roofcurb

SMALL/COMMON CURB

A09090

ROOF CURB DETAIL

48VL--A

SUPPLY

AIR

SMALL BASE UNIT

RETURN

AIR

LARGE BASE UNIT

UNIT PLACEMENT ON

LARGE CURB

A09415

COMMON CURB

SMALL OR LARGE BASE UNIT

A09094

UNIT SIZE

Small

Large

CATALOG

NUMBER

CPRFCURB010A00

CPRFCURB011A00

CPRFCURB012A00

Large

CPRFCURB013A00

* Part Numbers CPRCURB010A00 and CPRCURB011A00 can be used on both small an d large basepan units. T he cross supports must be located based on whether the unit is a small basepan or a large basepan. NOTES:

1. Roof curb must be set up for unit being installed.

2. Seal strip must be applied, as required, to unit being installed.

3. Roof curb is made of 16--gauge steel.

4. Attach ductwork to curb (flanges of duct rest on curb).

5. Insulated panels: 1--in. (25.4 mm) thick fiberglass 1 lb. density.

IN.

(mm)

(279)

(356)

(279)

(356)

B (small / common

base)

IN. (mm)*

10 (254)

14 (356)

Fig. 5 -- Roof Curb Dimensions

B(large

base)

IN. (mm)*

14 (356)

A09414

IN.

(mm)

(406)

IN.

(mm)

47.8

(1214)

IN.

(mm)

32.4

(822)

43.9

(1116)

IN.

(mm)

2.7 (69)

IN. (mm)HIN. (mm)

30.6 (778)

46.1 (1170)

42.2 (1072)

CAUTION - NOTICE TO RIGGERS PRUDENCE - AVIS AUX MANIPULATEUR

ACCESS PANELS MUST BE IN PLACE WHEN RIGGING.

PANNEAUX D'ACCES DOIT ÊTRE EN PLACE POUR MANIPULATION.

Use top skid as spreader bar. / Utiliser la palette du haut comme barre de répartition

DUCTS

MINIMUM HEIGHT: 36" (914.4 mm) HAUTEUR MINIMUM

BANDE SCELLANT DOIT ÊTRE EN PLACE AVANT DE PLACER L'UNITÉ SUR LA BASE DE TOIT

50CY502286 2.0

SEE DETAIL A VOIR DÉTAIL A

UNIT HEIGHT HAUTEUR D'UNITÉ

DETAIL A

VOIR DÉTAIL A

SEAL STRIP MUST BE IN PLACE BEFORE PLACING UNIT ON ROOF CURB

SMALL CABINET LARGE CABINET

Unit *

24 30 36

lb kg lb kg lb kg lb kg lb kg lb kg

Unit *

42 48 60

Rigging Weight 337 153 349 158 383 174 Rigging Weight 472 214 490 222 518 235

* For 460 volt units add 14 lb (6.35 kg) to the rigging weight. NOTE: See dimensional drawing for corner weights.

Fig. 6 -- 48VL--A Unit Suggested Rigging

48VL--A

A09051

Table 1 – Physical Data -- Unit 48VL--A

1600

1750

UNIT SIZE 24040 24060 30040 30060 36060 36090 42060 42090 NOMINAL CAPACITY (ton) 2 2 2 --- 1 / 2 2 --- 1 /2 3 3 3 --- 1 / 2 3 --- 1 /2 SHIPPING WEIGHT** lb.

SHIPPING WEIGHT** (kg)

COMPRESSORS

Quantity

REFRIGERANT (R--- 410A)

Quantity lb. Quantity (kg)

REFRIGERANT METERING DEVICE TXV OUTDOOR COIL

Rows...Fins/in. Face Ar ea (sq ft)

OUTDOOR FAN

Nominal CFM Diameter in. Diameter (mm)

Motor Hp (Rpm)

INDOOR COIL

Rows...Fins/in. Face Ar ea (sq ft)

INDOOR BLOWER

Nominal Cooling Airflow (Cfm)

Size in. Size (mm.) Motor HP (RPM)

48VL--A

FURNACE SECTION*

Burner Orifice No. (Qty...Drill Size) Natural Gas (Factory Installed) Propane Gas

HIGH--PRESSURE SWITCH (psig) Cut--out Reset (Auto)

LOSS-- OF-- CHARGE / LOW-- PRESSURE SWITCH (Liquid Line) (psig) cut--out Reset (auto)

RETURN--- AIR FILTERS†}

Throwaway Si ze in.

(mm)

337 153

6.0

2.7

1..21

11.9

2500

609.6

1/10 (810)

3...17

3.7

800

10x10

254x254

1/2 (1050)

2...44

2...55

20x20x1

508x508x25

337 153

6.0

2.7

1...21

11.9

2500

609.6

1/10 (810)

3...17

3.7

800

10x10

254x254

1/2 (1050)

2...38

2...53

349 158

5.6

2.5

1...21

13.6

2700

609.6

1/10 (810)

3...17

3.7

1000

10x10

254x254

1/2 (1050)

2...44

2...55

20x24x1

508x610x25

349 158

5.6

2.5

1...21

13.6

2700

609.6

1/10 (810)

3...17

3.7

1000

10x10

254x254

1/2 (1050)

2...38

2...53

650 +/-- 15 420 +/-- 25

45 +/-- 10

Scroll

20 +/-- 5

383 174

9.5

4.3

2...21

15.4

2800

609.6

1/5 (810)

3...17

3.7

1200

11x10

279.4x254 3/4 (1000)

2...38

2...53

383 174

9.5

4.3

2...21

15.4

2800

609.6

1/5 (810)

3...17

3.7

1200

11x10

279.4x254 3/4 (1000)

3...38

3...53

610x762x25

24x30x1

472 214

8.8

4.0

2...21

13.6

3000

660.4

1/5 (810

3...17

4.7

1400

11x10

279.4x254 3/4 (1075)

2...38

2...53

Table 1—Physical Data Con’t -- Unit 48VL--A

UNIT SIZE 48090 48115 48130 60090 60115 60130 NOMINAL CAPACITY (ton) 4 4 4 5 5 5 SHIPPING WEIGHT** lb

SHIPPING WEIGHT** kg

COMPRESSORS

Quantity

REFRIGERANT (R--- 410A)

Quantity lb Quantity (kg.)

REFRIGERANT METERING DEVICE TXV OUTDOOR COIL

Rows...Fins/in. Face Ar ea (sq ft)

OUTDOOR FAN

Nominal Cfm Diameter in. Diameter (mm) Motor Hp (Rpm)

INDOOR COIL

Rows...Fins/in. Face Ar ea (sq ft)

INDOOR BLOWER

Nominal Cooling Airflow (Cfm)

Size in. Size (mm) Motor HP (RPM)

FURNACE SECTION* Burner Orifice No. (Qty...Drill Size)

Natural Gas (Factory Installed) Propane Gas

HIGH--PRESSURE SWITCH (psig) Cut--out Reset (Auto)

LOSS-- OF-- CHARGE / LOW-- PRESSURE SWITCH (Liquid Line) (psig) cut--out Reset (auto)

RETURN-- AIR FILTERS Throwaway†} in.

(mm)

*Based on altitude of 0 to 2000 ft (0 ---610 m). { Required filter sizes shown are based on the larger of the AHRI (Air Conditioning Heating and Refrigeration Institute) rated cooling airflow or the heating airflow velocity of 300 ft/minute for throwaway type. Air filter pressure drop for non ---standard filters must not exceed 0.08 IN. W.C. } If using accessory filter rack refer to the filter rack installation instructions for correct filter sizes and quantity.

** For 460 volt units, add 14 lbs (6.35 kg) to the shipping weight.

490 222

9.4

4.3

2...21

17.5

3200

660.4

1/5 (810)

3...17

4.7

1600 1600 1600 1750 1750

11x10

279.4x254

1.0 ( 1075)

3...38

3...53

490 222

9.4

4.3

2...21

17.5

3200

660.4

1/5 (810)

3...17

4.7

11x10

279.4x254

1.0 ( 1075)

3...33

3...51

490 222

9.4

4.3

2...21

17.5

3200

660.4

1/5 (810)

3...17

4.7

11x10

279.4x254

1.0 ( 1075)

3...31

3...49

Scroll

650 +/-- 15 420 +/-- 25

20 +/-- 5

45 +/-- 10

24x36x1

610x914x25

518 235

12.5

5.7

2...21

21.4

3600

660.4

1/5 (810)

3...17

5.7

11x10

279.4x254

1.0 ( 1040)

3...38

3...53

518 235

12.5

5.7

2...21

21.4

3600

660.4

1/5 (810)

3...17

5.7

11x10

279.4x254

1.0 ( 1040)

3...33

3...51

472 214

8.8

4.0

2...21

13.6

3000

660.4

1/5 (810)

3...17

4.7

1400

11x10

279.4x254 3/4 (1075)

3...38

3...53

518 235

12.5

5.7

2...21

21.4

3600

660.4

1/5 (810)

3...17

5.7

1750

11x10

279.4x254

1.0 ( 1040)

3...31

3...49

Step 6 — Connect Condensate Drain

NOTE: When installing condensate drain connection be sure to

comply with local codes and restrictions. Model 48VL--A disposes of condensate water through a 3/4 in.

NPT fitting which exits through the base on the evaporator coil access side. See Fig. 3 & 4 for location.

Condensate water can be drained directly onto the roof in rooftop installations (where permitted) or onto a gravel apron in ground level installations. Install a field--supplied 2--in. (51 mm) condensate trap at the end of condensate connection to ensure proper drainage. Make sure that the outlet of the trap is at least 1 in. (25 mm) lower than the drain--pan condensate connection to prevent the pan from overflowing (See Fig. 7). Prime the trap with water. When using a gravel apron, make sure it slopes away from the unit.

Connect a drain tube using a minimum of 3/4--in. PVC or 3/4--in. copper pipe (all field--supplied) at the outlet end of the 2--in. (51 mm) trap. Do not undersize the tube. Pitch the drain tube downward at a slope of at least 1--in. (25 mm) for every 10 ft (3.1 m) of horizontal run. Be sure to check the drain tube for leaks.

TRAP OUTLET

1-in. (25 mm) min.

2-in. (51 mm) min.

A09052

Fig. 7 -- Condensate Trap

Step 7 — Install Flue Hood

The flue assembly is secured and shipped in the return air duct. Remove duct cover to locate the assembly (See Fig. 9).

NOTE: Dedicated low NOx models MUST be installed in California Air Quality Management Districts where a Low NOx rule exists.

These models meet the California maximum oxides of nitrogen (NOx) emissions requirements of 40 nanograms/joule or less as shipped from the factory.

NOTE: Low NOx requirements apply only to natural gas installations.

WARNING

CARBON MONOXIDE POISONING HAZARD

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

The venting system is designed to ensure proper venting. The flue hood assembly must be installed as indicted in this section of the unit installation instructions.

Install the flue hood as follows:

1. This installation must conform with local building codes and with NFPA 54/ANSI Z223.1 National Fuel Gas Code (NFGC), (in Canada, CAN/CGA B149.1, and B149.2) latest revision. Refer to Provincial and local plumbing or wastewater codes and other applicable local codes.

2. Remove flue hood from shipping location (inside the return section of the blower compartment--see Fig. 9). Remove the return duct cover to locate the flue hood. Place flue hood assembly over flue panel. Orient screw holes in flue hood with holes in the flue panel.

3. Secure flue hood to flue panel by inserting a single screw on the top flange and the bottom flange of the hood.

Step 8 — Install Gas Piping

The gas supply pipe enters the unit through the access hole provided. The gas connection to the unit is made to the 1/2--in. (12.7 mm) FPT gas inlet on the gas valve.

Install a gas supply line that runs to the heating section. Refer to the NFGC for gas pipe sizing. Do not use cast--iron pipe. It is recommended that a black iron pipe is used. Check the local utility for recommendations concerning existing lines. Size gas supply piping for 0.5 IN. W.C. maximum pressure drop. Never use pipe smaller than the 1/2--in. (12.7 mm) FPT gas inlet on the unit gas valve.

For natural gas applications, the gas pressure at unit gas connection must not be less than 4.0 IN. W.C. or greater than 13 IN. W.C. while the unit is operating. For propane applications, the gas pressure must not be less than 11.0 IN. W.C. or greater than 13 IN. W.C. at the unit connection.

A 1/8--in. (3.2 mm) NPT plugged tapping, accessible for test gauge connection, must be installed immediately upstream of the gas supply connection to the gas valve.

When installing the gas supply line, observe local codes pertaining to gas pipe installations. Refer to the NFPA 54/ANSI Z223.1 latest edition (in Canada, CAN/CGA B149.1).

NOTE: In the state of Massachusetts:

1. Gas supply connections MUST be performed by a licensed plumber or gas fitter.

2. When flexible connectors are used, the maximum length shall not exceed 36 inches (915 mm).

3. When lever handle type manual equipment shutoff valves are used, they shall be T--handle valves.

4. The use of copper tubing for gas piping is NOT approved by the state of Massachusetts.

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 1/4 in. (6.35 mm) for every 15 ft (4.6 m) of length 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 1/2 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. Never use Teflon tape.

4. Install sediment trap in riser leading to heating section (See Fig. 8). This drip leg functions as a trap for dirt and condensate.

5. Install an accessible, external, manual main shutoff valve in gas supply pipe within 6 ft (1.8 m) of heating section.

6. Install ground--joint union close to heating section between unit manual shutoff and external manual main shut--off valve.

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

48VL--A

Table 2 – Maximum Gas Flow Capacity*

NOMINAL

IRON PIPE

SIZE (IN.)

1/2 .622 175 120 97 82 73 66 61 57 53 50 44 40 — — 3/4 .824 360 250 200 170 151 138 125 118 110 103 93 84 77 72

1 1.049 680 465 375 320 285 260 240 220 205 195 175 160 145 135 1 --- 1 / 4 1.380 1400 950 770 600 580 530 490 460 430 400 360 325 300 280 1 --- 1 / 2 1.610 2100 1460 1180 990 900 810 750 690 650 620 550 500 460 430

*Capacity of pipe in cu ft of gas per hr for gas pressure of 0.5 psig or less. Pressure drop of 0.5 - -- IN. W.C. (based on a 0.60 specific gravity gas). Refer toTable2 and National Fuel Gas Code NFPA 54/ANSI Z223.1.

{ This length includes an ordinary number of fittings.

INTERNAL DIAMETER

(IN.)

(3)20(6)30(9)40(12)50(15)60(18)70(21)80(24)90(27)

LENGTH OF PIPE FT (m)†

100

(30)

125

(38)

150

(46)

175

(53)

200

(61)

OUT

48VL--A

TEE

NIPPLE

CAP

Fig. 8 -- Sediment Trap

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. Pressure test the gas supply piping system at pressures equal to or less than 0.5 psig. 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.

WARNING

C99020

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

Step 9 — Install Duct Connections

The unit has duct flanges on the supply-- and return--air openings on the side and bottom of the unit. For downshot applications, the ductwork connects to the roof curb (See Fig. 3 and 4 for connection sizes and locations).

Configuring Units for Downflow (Vertical) Discharge

WARNING

ELECTRICAL SHOCK HAZARD

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

Before installing or servicing system, always turn off main power to system and install lockout tag. There may be more than one disconnect switch.

1. Open all electrical disconnects before starting any service work.

2. Remove horizontal (metal) duct covers to access vertical (downflow) discharge duct knockouts in unit basepan. (See Fig. 9.)

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. A fire or explosion may result causing property damage, personal injury or loss of life.

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

--If a flexible connector is required or allowed by authority having jurisdiction, black iron pipe shall be installed at furnace gas valve and extend a minimum of 2 in. (51 mm) outside furnace casing.

--If codes allow a flexible connector, always use a new connector. Do not use a connector which has previously serviced another gas appliance.

CAUTION

PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in property damage. Collect ALL screws that were removed. Do not leave screws

on rooftop as permanent damage to the roof may occur.

To remove downflow return and supply knockout covers, break front and right side connecting tabs with a screwdriver and hammer. Push cover down to break rear and left side tabs.

NOTE: These panels are held in place with tabs similar to an electrical knockout. Reinstall horizontal duct covers (see Fig. 9) shipped on unit from factory. Insure openings are air and watertight.

NOTE: The design and installation of the duct system must be in accordance with the standards of the NFPA for installation of nonresidence--type air conditioning and ventilating systems, NFPA 90A or residence--type, NFPA 90B; and/or local codes and ordinances.

Horizontal Duct Covers

A09076

Basepan Downflow (Vertical) Supply Knockout

Fig. 9 -- Supply and Return Duct Opening

Adhere to the following criteria when selecting, sizing, and installing the duct system:

1. Units are shipped for horizontal duct installation (by removing duct covers).

2. Select and size ductwork, supply--air registers, and return--air grilles according to American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE) recommendations.

3. Use flexible transition between rigid ductwork and unit to prevent transmission of vibration. The transition may be screwed or bolted to duct flanges. Use suitable gaskets to ensure weather--tight and airtight seal.

4. All units must have field--supplied filters or accessory filter rack installed in the return--air side of the unit. Recommended sizes for filters are shown in Table 1.

5. Size all ductwork for maximum required airflow (either heating or cooling) for unit being installed. Avoid abrupt duct size increases or decreases or performance may be affected.

6. Adequately insulate and weatherproof all ductwork located outdoors. Insulate ducts passing through unconditioned space, and use vapor barrier in accordance with latest issue of Sheet Metal and Air Conditioning Contractors National Association (SMACNA) and Air Conditioning Contractors of America (ACCA) minimum installation standards for heating and air conditioning systems. Secure all ducts to building structure.

7. Flash, weatherproof, and vibration isolate all openings in building structure in accordance with local codes and good building practices.

Basepan Downflow (Vertical) Return Knockout

A09077

Step 10 — Install Electrical Connections

WARNING

ELECTRICAL SHOCK HAZARD

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

The unit cabinet must have an uninterrupted, unbroken electrical ground. This ground may consist of an electrical wire connected to the unit ground screw in the control compartment, or conduit approved for electrical ground when installed in accordance with NFPA 70 (NEC) (latest edition) (in Canada, Canadian Electrical Code CSA C22.1) and local electrical codes.

UNIT COMPONENT DAMAGE HAZARD

Failure to follow this caution may result in damage to the unit being installed.

1. Make all electrical connections in accordance with NFPA 70 (NEC) (latest edition) and local electrical codes governing such wiring. In Canada, all electrical connections must be in accordance with CSA standard C22.1 Canadian Electrical Code Part 1 and applicable local codes. Refer to unit wiring diagram.

2. Use only copper conductor for connections between field--supplied electrical disconnect switch and unit. DO NOT USE ALUMINUM WIRE.

3. Be sure that high--voltage power to unit is within operating voltage range indicated on unit rating plate. On 3--phase units, ensure phases are balanced within 2 percent. Consult local power company for correction of improper voltage and/or phase imbalance.

4. Insulate low--voltage wires for highest voltage contained within conduit when low--voltage control wires are in same conduit as high--voltage wires.

5. Do not damage internal components when drilling through any panel to mount electrical hardware, conduit, etc.

High--Voltage Connections

When routing power leads into unit, use only copper wire between disconnect and unit. The high voltage leads should be in a conduit until they enter the duct panel; conduit termination at the duct panel must be watertight.

The unit must have a separate electrical service with a field--supplied, waterproof disconnect switch mounted at, or within sight from, the unit. Refer to the unit rating plate, NEC and local codes for maximum fuse/circuit breaker size and minimum circuit amps (ampacity) for wire sizing.

The field--supplied disconnect switch box may be mounted on the unit over the high--voltage inlet hole when the standard power and low--voltage entry points are used (See Fig. 3 and 4 for acceptable location).

NOTE: Field supplied disconnect switch box should be positioned so that it does not cover up any of the unit gas combustion supply air louvers.

See unit wiring label (Fig. 14, 15 and 16) and Fig. 10 for reference when making high voltage connections. Proceed as follows to complete the high--voltage connections to the unit.

Single phase units:

1. Run the high--voltage (L1, L2) and ground lead into the control box.

CAUTION

48VL--A

2. Connect ground lead to chassis ground connection.

3. Locate the black and yellow wires connected to the line side of the contactor (if equipped).

4. Connect field L1 to black wire on connection 11 of the compressor contactor.

5.ConnectfieldwireL2toyellowwireonconnection23of the compressor contactor.

Three--phase units:

1. Run the high--voltage (L1, L2, L3) and ground lead into the control box.

2. Connect ground lead to chassis ground connection.

3. Locate the black and yellow wires connected to the line side of the contactor (if equipped).

4. Connect field L1 to black wire on connection 11 of the compressor contactor.

5.ConnectfieldwireL3toyellowwireonconnection13of the compressor contactor.

6. Connect field wire L2 to blue wire from compressor.

Special Procedures for 208--v Operation

WARNING

48VL--A

ELECTRICAL SHOCK HAZARD

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

Make sure thepower supply to the unit is switched OFF and install lockout tag. before making any wiring changes. With disconnect switch open, move black wire from transformer (3/16 in. [4.8 mm]) terminal marked 230 to terminal marked

208. This retaps transformer to primary voltage of 208 vac.

WARNING

Standard Connection

Run the low--voltage leads from the thermostat, through the inlet hole, and into unit low--voltage splice box.

Locate six (seven for 3--phase) 18--gage wires leaving control box. These low--voltage connection leads can be identified by the colors red, green, yellow, brown, blue, and white (See Fig. 10). A gray wire is standard on 3--phase units for connection to an economizer. Ensure the leads are long enough to be routed into the low--voltage splice box (located below right side of control box). Route leads through hole in bottom of control box and make low--voltage connections (See Fig. 10). Secure all cut wires, so that they do not interfere with operation of unit.

HIGH VOLTAGE POWER LEADS (SEE UNIT WIRING LABEL

)

3-PHASE SHOWN 1-PHASE USES TWO POWER LEADS

CONTROL BOX

LOW-VOLTAGE POWER LEADS (SEE UNIT WIRING LABEL)

EQUIP GR

SPLICE BOX

FIELD-SUPPLIED FUSED DISCONNECT

WHT(W1)

YEL(Y)

GRN(G)

RED(R)

BRN(C)

BLU(DH)

GRA(Y2)

Fig. 10 -- High-- and Control--Voltage Connections

3-Phase Only

POWER SUPPLY

THERMOSTAT (TYPICAL)

A09053

ELECTRICAL SHOCK FIRE/EXPLOSION HAZARD

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

Before making any wiring changes, make sure the gas supply is switched off first. Then switch off the power supply to the unit and install lockout tag.

Control Voltage Connections

Do not use any type of power--stealing thermostat. Unit control problems may result.

Use no. 18 American Wire Gage (AWG) color--coded, insulated (35_C minimum) wires to make the control voltage connections between the thermostat and the unit. If the thermostat is located more than 100 ft (30.5 m) from the unit (as measured along the control voltage wires), use no. 16 AWG color--coded, insulated (35_C minimum) wires.

Heat Anticipator Setting (Electro--Mechanical Thermostats

The room thermostat heat anticipator must be properly adjusted to ensure proper heating performance. Set the heat anticipator, using an ammeter between the W and R terminals to determine the exact required setting.

NOTE: For thermostat selection purposes, use 0.18 amp for the approximate required setting. Failure to make a proper heat anticipator adjustment will result in improper operation, discomfort to the occupants of the conditioned space, and inefficient energy utilization; however, the required setting may be changed slightly to provide a greater degree of comfort for a particular installation.

only)

Transformer Protection

The transformer is of the energy--limiting type, however a direct short will likely blow a secondary fuse. If an overload or short is present, correct overload condition and check for blown fuse on Indoor Fan board or Integrated Gas Controller. Replace fuse as required with correct size and rating.

PRE--START--UP

WARNING

ENVIRONMENTAL, FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD

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

1. Follow recognized safety practices and wear protective goggles when checking or servicing refrigerant system.

2. Do not operate compressor or provide any electric power to unit unless compressor plug is in place and secured.

3. Do not remove compressor plug until all electrical sources are disconnected and tagged.

4. Relieve and recover all refrigerant from system before touching or disturbing compressor plug if refrigerant leak is suspected around compressor terminals.

5. Never attempt to repair soldered connection while refrigerant system is under pressure.

6. Do not use torch to remove any component. System contains oil and refrigerant under pressure. To remove a component, wear protective goggles and proceed as follows:

a. Shut off electrical power to unit and install

lockout tag.

b. Relieve and reclaim all refrigerant from system

using both high-- and low--pressure ports.

c. Cut component connecting tubing with tubing

cutter and remove component from unit.

d. Carefully unsweat remaining tubing stubs when

necessary. Oil can ignite when exposed to torch flame.

Use the Start--Up Checklist supplied at the end of this book and proceed as follows to inspect and prepare the unit for initial start--up:

1. Remove access panels (see Fig. 19).

2. Read and follow instructions on all DANGER, WARNING, CAUTION, and INFORMATION labels attached to, or shipped with unit.

3. Make the following inspections:

a. Inspect for shipping and handling damage, such as

broken lines, loose parts, disconnected wires, etc.

b. Inspect for oil at all refrigerant tubing connections and

on unit base. Detecting oil generally indicates a refrigerant leak.

c. Leak--test all refrigerant tubing connections using

electronic leak detector, or liquid--soap solution. If a refrigerant leak is detected, see following Check for Refrigerant Leaks section.

d. Inspect all field-- and factory--wiring connections. Be

sure that connections are completed and tight.

e. Ensure wires do not touch refrigerant tubing or sharp

sheet metal edges.

f. Inspect coil fins. If damaged during shipping and

handling, carefully straighten fins with a fin comb.

WARNING

FIRE, EXPLOSION HAZARD

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

Do not purge gas supply into the combustion chamber. Do not use a match or other open flame to check for gas leaks. Use a commercially available soap solution made specifically for the detection of leaks to check all connections. A fire or explosion may result causing property damage, personal injury or loss of life.

4. Verify the following conditions: a. Make sure gas line is free of air. Before lighting the unit

for the first time, perform the following with the gas valve in the OFF position:

NOTE: If the gas supply pipe was not purged before connecting the unit, it will be full of air. It is recommended that the ground joint union be loosened, and the supply line be allowed to purge until the odor of gas is detected. Never purge gas lines into a combustion chamber. Immediately upon detection of gas odor, retighten the union. Allow 5 minutes to elapse, then light unit.

b. Ensure fan hub is positioned correctly with respect to

motor housing.

c. Make sure that air filter(s) is in place.

d. Make sure that condensate drain trap is filled with water

to ensure proper drainage.

e. Make sure that all tools and miscellaneous loose parts

have been removed.

START--UP

Step 1 — Check for Refrigerant Leaks

Proceed as follows to locate and repair a refrigerant leak and to charge the unit:

1. Locate leak and make sure that refrigerant system pressure

has been relieved and reclaimed from both high-- and low--pressure ports.

2. Repair leak following accepted practices.

NOTE: Install a filter drier whenever the system has been opened for repair.

3. Add a small charge of Puron (R--410A) refrigerant vapor to

system and leak--test unit.

4. Recover refrigerant from refrigerant system and evacuate to

500 microns if no additional leaks are found.

5. Charge unit with Puron (R--410A) refrigerant, using an

accurate scale. Refer to unit rating plate for required charge.

48VL--A

Step 2 — Start--up Heating and Make Adjustments

Complete the required procedures given in the Pre--Start--Up section before starting the unit. Do not jumper any safety devices when operating the unit. Make sure that burner orifices are properly aligned. Unstable operation my occur when the burner orifices in the manifold are misaligned.

Follow the lighting instructions on the heating section operation label (located on the inside of the control access panel) to start the heating section.

NOTE: Make sure that gas supply has been purged, and that all gas piping has been checked for leaks.

48VL--A

Pipe Plug

Fig. 11 -- Burner Assembly

Fig. 12 -- Monoport Burner

Check Heating Control

Start and check the unit for proper heating control operation as follows (see furnace lighting instructions located on the inside of the control access panel):

1. Place room thermostat SYSTEM switch in the HEAT position and the fan switch is placed in AUTO position.

2. Set the heating temperature control of the thermostat above room temperature.

3. The induced--draft motor will start.

4. On a call for heating, the main burner should light within 5 sec. of the spark being energized. If the burners do not light, there is a 22--sec. delay before another 5--sec. try. If the burners still do not light, this sequence is repeated. If the burners do not light within 15 minutes from the initial call for heat, there is a lockout. To reset the control, break the 24--v power to W.

5. The evaporator fan will turn on 45 sec. after the flame has been established. The evaporator fan will turn off 45 sec.

Manifold

BURNER FLAME

BURNER

MANIFOLD

A07679

C99021

after the thermostat has been satisfied. Please note that the integrated gas unit controller (IGC) has the capability to automatically reduce the evaporator “ON” delay and increase the evaporator “OFF” delay in the event of high duct static and/or partially--clogged filter.

Check Gas Input

Check gas input and manifold pressure after unit start--up (See Table 4). If adjustment is required proceed as follows:

S The rated gas inputs shown in Table 4 are for altitudes from sea

level to 2000 ft (610 m) above sea level. These inputs are based

on natural gas with a heating value of 1025 Btu/ft specific gravity, or propane gas with a heating value of 2500

at 1.5 specific gravity.

Btu/ft

IN THE U.S.A.: The input rating for altitudes above 2,000 ft (610 m) must be

reduced by 4% for each 1,000 ft (305 m) above see level. For installations below 2,000 ft (610 m), refer to the unit rating

plate. For installations above 2,000 ft (610 m). multiply the input on the

rating plate by the derate multiplier in Table 3 for correct input rate.

Table 3 – Altitude Derate Multiplier for U.S.A.*

ALTITUDE FT (M) P ERCENT OF DERATE

0--- 2000

(0--- 610)

2001--- 3000*

(610--- 914)

3001--- 4000

(915--- 1219)

4001--- 5000

(1220--- 1524)

5001--- 6000

(1524 ---1829)

6001--- 7000

(1829--- 2134)

7001--- 8000

(2134--- 2438)

8001--- 9000

(2439--- 2743)

9001--- 10,000

(2744--- 3048)

*In Can ada see Canadian Altitude Adjustment. {Derate multiplier factors are based on midpoint altitude for altitude range.

0 1.00

8 --- 1 2 0.90

12--- 16 0.86

16--- 20 0.82

20--- 24 0.78

24--- 28 0.74

28--- 32 0.70

32--- 36 0.66

36--- 40 0.62

DERATE MULTIPLIER

IN CANADA: The input rating for altitudes from 2,000 (610 m) to 4,500 ft (1372

m) above sea level must be derated 10% by an authorized Gas Conversion Station or Dealer.

EXAMPLE: 90,000 Btu/hr Input Furnace Installed at 4300 ft.

Furnace Input Rate at Sea Level

90,000 X 0.90 = 81,000

XDerateMultiplier

Facto r

= Furnace Input Rate at

When the gas supply being used has a different heating value or specific gravity, refer to national and local codes, or contact your distributor to determine the required orifice size.

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in reduced unit and/or component life.

Do Not redrill an orifice. Improper drilling (burrs, out--of--round holes, etc.) can cause excessive burner noise and misdirection of burner flame. If orifice hole appears damaged or it is suspected to have been redrilled, check orifice hole with a numbered drill bit of correct size.

at 0.60

FACT OR{

Installation Altitude

Adjust Gas Input

NUMBER

MANIFOLD

PRES

SURE

ORIFICES

The gas input to the unit is determined by measuring the gas flow at the meter or by measuring the manifold pressure. Measuring the gas flow at the meter is recommended for natural gas units. The manifold pressure must be measured to determine the input of propane gas units.

Measure Gas Flow (Natural Gas Units)

Minor adjustment to the gas flow can be made by changing the manifold pressure. The manifold pressure must be maintained between 3.2 and 3.8 IN. W.C.

REGULATOR COVER SCREW

PLASTIC

ADJUSTMENT

ON/OFF SWITCH

INLET PRESSURE TAP

SCREW

REGULATOR SPRING (PROPANE - WHITE)

(

NATURAL - SILVER)

GAS PRESSURE REGULATOR ADJUSTMENT

EXAMPLE: Assume that the size of test dial is 1 cu ft, one revolution takes 32 sec, and the heating value of the gas is 1050

. Proceed as follows:

Btu/ft

1. 32 sec. to complete one revolution.

2. 3600 ÷ 32 = 112.5.

3. 112.5x1=112.5ft

of gas flow/hr.

4. 112.5 x 1050 = 118,125 Btuh input.

If the desired gas input is 115,000 Btuh, only a minor change in the manifold pressure is required.

Observe manifold pressure and proceed as follows to adjust gas input:

1. Remove regulator cover screw over plastic adjustment screw on gas valve (See Fig. 13).

2. Turn plastic adjustment screw clockwise to increase gas input, or turn plastic adjustment screw counterclockwise to decrease input (See Fig. 13). Manifold pressure must be between 3.2 and 3.8 IN. WC.

WARNING

MANIFOLD PRESSURE TAP

A07751

Fig. 13 -- Single--Stage Gas Valve

If larger adjustments are required, change main burner orifices following the recommendations of national and local codes.

NOTE: All other appliances that use the same meter must be turned off when gas flow is measured at the meter.

Proceed as follows:

1. Turn off gas supply to unit.

2. Remove pipe plug on manifold (See Fig. 11) and connect manometer. Turn on gas supply to unit.

3. Record number of seconds for gas meter test dial to make one revolution.

4. Divide number of seconds in Step 3 into 3600 (number of seconds in one hr).

5. Multiply result of Step 4 by the number of cubic feet (cu ft) shown for one revolution of test dial to obtain cubic feet (cu ft) of gas flow per hour.

6. Multiply result of Step 5 by Btu heating value of gas to obtain total measured input in Btuh. Compare this value with heating input shown in Table 4 (Consult the local gas supplier if the heating value of gas is not known).

FIRE AND UNIT DAMAGE HAZARD

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

Unsafe operation of the unit may result if manifold pressure is outside this range.

3. Replace regulator cover screw on gas valve (See Fig. 13).

4. Turn off gas supply to unit. Remove manometer from pressure tap and replace pipe plug on gas valve. (See Fig.

11.) Turn on gas to unit and check for leaks.

Measure Manifold Pressure (Propane Units)

Refer to propane kit installation instructions for properly checking gas input.

NOTE: For installations below 2,000 ft (610 m), refer to the unit rating plate for proper propane conversion kit. For installations above 2,000 ft (610 m), contact your distributor for proper propane conversion kit.

Check Burner Flame

With control access panel (see Fig. 19) removed, observe the unit heating operation. Watch the burner flames to see if they are light blue and soft in appearance, and that the flames are approximately the same for each burner. Propane will have blue flame (See Fig.

12). Refer to the Maintenance section for information on burner removal.

48VL--A

HEATING INPUT

(BTUH)

40,000 2 4.0 13.0 11.0 13.0 3.2∼3.8 10.0∼11.0 60,000 2 4.0 13.0 11.0 13.0 3.2∼3.8 10.0∼11.0

90,000 3 4.0 13.0 11.0 13.0 3.2∼3.8 10.0∼11.0 115,000 3 4.0 13.0 11.0 13.0 3.2∼3.8 10.0∼11.0 130,000 3 4.0 13.0 11.0 13.0 3.2∼3.8 10.0∼11.0

*When a unit is converted to propan e, different size orifices must be used. See separate, natur al---to ---propane conversion kit instructions.

{Based on altitudes from sea level to 2000 ft (610 m) above sea level. In U.S.A. for altitudes above 2000 ft (610 m), reduce input rating 4 percent for ea ch addi-

tional 1000 ft (305 m) above sea level. In Canada, from 2000 ft (610 m) above sea level to 4500 ft (1372 m) above sea level, derate the unit 10 percent.

Table 4 – Heating Inputs

GAS SUPPLY PRESSURE (IN. W.C.)

Natural{ Propane*{

Min Max Min Max Natural{ Propane*†

MANIFOLD PRESSURE

(IN. W.C.)

48VL--A

A09282

Fig. 14 -- 208/230--1--60 Connection Wiring Diagram

48VL--A

Fig. 14 Cont. -- 208/230--1--60 Ladder Wiring Diagram

A09282

48VL--A

A09264

Fig. 15 -- 208/230--3--60 Connection Wiring Diagram

48VL--A

Fig. 15 Cont. -- 208/230--3--60 Ladder Wiring Diagram

A09264

DANGER: ELECTRICAL SHOCK HAZARD DISCONNECT POWER BEFORE SERVICING

NOTES:

1. IF ANY OF THE ORIGINAL WIRES FURNISHED ARE REPLACED, THEY MUST BE REPLACED WITH TYPE 90 DEG. C WIRE OR ITS EQUIVALENT.

2. SEE PRICE PAGES FOR THERMOSTAT AND SUBBASES.

3. USE 75 DEG. COPPER CONDUCTORS FOR FIELD INSTALLATION.

4. SEE INSTALLATION INSTRUCTIONS FOR PROPER HEATING AND COOLING CONNECTIONS FOR YOUR UNIT. INDOOR FAN MOTOR PLUGS

- "DO NOT DISCONNECT UNDER LOAD"

5. LS2 USED ON SMALL CHASSIS ONLY.

6. INDUCER CAPACITOR AND WIRING ON CERTAIN MODELS ONLY. IF CAP2 IS PRESENT, YELLOW WIRES FROM CONTACTOR AND IDM CONNECT ON SAME SIDE OF CAP2.

7. THIS FUSE IS MANUFACTURED BY LITTELFUSE, P/N 257003.

8. THIS FUSE IS MANUFACTURED BY LITTELFUSE, P/N 257005.

9. THESE FUSES ARE MANUFACTURED BY COOPER BUSSMAN, P/N FNQ-R-5.

10. DEHUMIDIFICATION FEATURE CANNOT BE USED WHEN ECONOMIZER IS INSTALLED.

48VL--A

ECONOMIZER PLUG

7 7

6 6

11 11

10 10

8 8

2 2

3 3

4 4

1 1

5 5

9 9

12 12

SEE NOTE 4

SEE NOTE 10

HEAT

GAS

ECON

5W4

SAT

CONNECTION WIRING DIAGRAM

CCH

11 21

123

AUTOTRANSFORMER

460

TRAN

GROUNDED THRU STANDOFF

FU1 5 AMP

SEE NOTE 9

FU2 5 AMP

IFB

HIGH

FIELD

SUPPLY

EQUIP_GND

COOLING FAN LOGIC

0 G

ENERGIZED

HEATING FAN LOGIC

ENERGIZED DE-ENERGIZED

T+60

DE-ENERGIZED

T W

T+45

T'STAT

Y2/DH

COM

Y1/Y

321

FUSE

24VAC

COM

24V

LOW

HPS

LPS

SEE NOTE 7

Fig. 16 -- 460--3--60 Connection Wiring Diagram

IF USED

460V

230V

PRIMARY

460V

SECONDARY

24V

IGC

FIELD SPLICE

TERMINAL (MARKED) TERMINAL (UNMARKED) SPLICE (IF USED) SPLICE (MARKED)

FACTORY WIRING FIELD CONTROL WIRING

FIELD POWER WIRING ACCESSORY OR OPTIONAL WIRING

TO INDICATE COMMON POTENTIAL ONLY:

NOT TO REPRESENT WIRING BLR BLOWER RELAY C CONTACTOR

CAP 1 CAPACITOR, COMP

CAP 2 CAPACITOR, INDUCER

COMP COMPRESSOR MOTOR CR COMBUSTION RELAY

460

IFC

CAP1

COMPRESSOR PLUG

LGPS (WHEN USED)

5A FUSE

LEGEND

OFM

SCHEMATIC 460-3-60

COMP

GND

COM

IDM

CAP 2

G/Y

SEE NOTE 6

SEE NOTE 9

SEE NOTE 5

LS1

DH DEHUMIDIFICATION SIGNAL ECON ECONOMIZER EQUIP EQUIPMENT FS FLAME SENSOR FU FUSE GND GROUND GVR GAS VALVE RELAY HV TRAN HIGH VOLTAGE TRANSFORMER I IGNITOR IFB INDOOR FAN BOARD IGC INTERGRATED GAS UNIT

IDM INDUCED DRAFT MOTOR IFM INDOOR FAN MOTOR LGPS LOW GAS PRESSURE SWITCH (WHEN USED) LS1 PRIMARY LIMIT SWITCH LS2 SECONDARY LIMIT SWITCH MGV MAIN GAS VALVE OFM OUTDOOR FAN MOTOR PRS PRESSURE SWITCH QT QUADRUPLE TERMINAL RS ROLLOUT SWITCH TRAN TRANSFORMER T'STAT THERMOSTAT

G/Y

CONTROLLER

LS2

PRS

MGV

COLOR CODE

BK BLACK BL BLUE BR BROWN GY GRAY

G GREEN O ORANGE P PINK R RED V VIOLET

W WHITE

Y YELLOW

IFM

GND

2435

SEE NOTE 4

A09265

LADDER WIRING DIAGRAM

DANGER: ELECTRICAL SHOCK HAZARD DISCONNECT POWER BEFORE SERVICING

3 UNIT COMPONENT ARRANGEMENT

OUTDOOR FAN SECTION

COMPRESSOR

INDOOR FAN

SECTION

LPS

HPS

COMP

IFM

CAP 1

OFM

LS1

(LARGE)

LS2

(SMALL)

LS1

(SMALL CABINET)

SEE NOTE 7

T'STAT

SEE NOTE 10

CONTROL BOX AREA

IGC

PRS

GAS SECTION

TRAN

1311

IFB

CAP 2

IDM

MGV

IFB

24VAC R

P1-1"R"

P1-4"G"

P1-6"W"

P1-5"Y2/DH"

P1-3"Y1/Y"

USE COPPER CONDUCTORS ONLY

FIELD SUPPLY

G/Y

460 VAC, 60 HZ, 3PH

FUSE

P2-1"R"

P2-5"X"

P2-3"W"

P2-4"R"

LOW

HIGH

GAS HEAT

CONT

CAP

IGC

IDM

460V

24V

IGC

5A FUSE

IFO

SEE NOTE 4

ECON

HARNESS

SEE NOTE 8

BL BL

LS1

LGPS (WHEN USED)

(SEE NOTE 5)

MGV

HPS

TRAN

PRIMARY 460V

SECONDARY 24V

LS2

BK BL

1 2

35 4

SAT

CCH

(IF USED)

OFM

COMP

IFM

G/Y

VRV

460V

24V

PRS

LPS

IFM

Fig. 16 Cont. -- 460--3--60 Ladder Wiring Diagram

G/Y

CAP2

C1 C2

IGC

CONT

G/Y

SEE NOTE 6

48VL500174

IFB

COM C

P2-2"C"

COM

P1-2"C"

COM C

48VL--A

A09265

Normal Operation

An LED (light--emitting diode) indicator is provided on the integrated gas unit controller (IGC) to monitor operation. The IGC is located by removing the control access panel (see Fig. 19). During normal operation, the LED is continuously on (See Table 5 for error codes).

Airflow and Temperature Rise

The heating section for each size unit is designed and approved for heating operation within the temperature--rise range stamped on the unit rating plate.

Table 8 shows the approved temperature rise range for each heating input, and the air delivery cfm at various temperature rises for a given external static pressure. The heating operation airflow must produce a temperature rise that falls within the approved range.

Refer to Indoor Airflow and Airflow Adjustments section to adjust heating airflow when required.

Heating Sequence of Operation

(See Fig. 14, 15, 16 and unit wiring label.) On a call for heating, terminal W of the thermostat is energized,

starting the induced--draft motor. When the pressure switch senses that the induced--draft motor is moving sufficient combustion air,

48VL--A

the burner sequence begins. This function is performed by the integrated gas unit controller (IGC). The indoor (evaporator)--fan motor is energized 45 sec after flame is established. When the thermostat is satisfied and W is de--energized, the burners stop firing and the indoor (evaporator) fan motor shuts off after a 45--sec time--off delay. Please note that the IGC has the capability to automatically reduce the indoor fan motor on delay and increase the indoor fan motor off delay in the event of high duct static and/or partially--clogged filter.

Limit Switches

Normally closed limit switch (LS) completes the control circuit. Should the leaving--air temperature rise above the maximum allowable temperature, the limit switch opens and the control circuit “breaks.” Any interruption in the control circuit instantly closes the gas valve and stops gas flow to the burners. The blower motor continues to run until LS resets.

When the air temperature at the limit switch drops to the low--temperature setting of the limit switch, the switch closes and completes the control circuit. The direct--spark ignition system cycles and the unit returns to normal heating operation.

Table 5 – LED Indications

STATUS CODE LED INDICATION

Normal Operation

No Power or Hardware Failure Off

Limit Switch Fault 2 Flashes Flame Sense Fault 3 Flashes

Four Consecutive Limit Switch Faults 4 Flashes

Ignition Lockout Fault 5 Flashes Pressure Switch Fault 6 Flashes

Rollout Switch Fault 7 Flashes

Internal Control Fault 8 Flashes

Temporary 1 hr auto reset

NOTES:

1.This code indicates an internal processor fault that will reset itself in one hr. Fault can be caused by stray RF signals in the structure or nearby. This is a UL requirement.

2. LED indicates acceptable operation. Do not change ignition control board.

3. When W is energized the burners will remain on for a minimum of 60 sec.

4.IfmorethanoneerrorcodeexiststheywillbedisplayedontheLEDin sequence.

9 Flashes

Rollout Switch

The function of the rollout switch is to close the main gas valve in the event of flame rollout. The switch is located above the main burners. When the temperature at the rollout switch reaches the maximum allowable temperature, the control circuit trips, closing the gas valve and stopping gas flow to the burners. The indoor (evaporator) fan motor (IFM) and induced draft motor continue to run until switch is reset. The IGC LED will display FAULT CODE

Step 3 — Start--up Cooling and Make Adjustments

Complete the required procedures given in the Pre--Start--Up section before starting the unit. Do not jumper any safety devices when operating the unit. Do not operate the compressor when the outdoor temperature is below 40°F(4.4°C) (unless accessory low--ambient kit is installed). Do not rapid--cycle the compressor. Allow 5 minutes between on cycles to prevent compressor damage.

Checking Cooling Control Operation

Start and check the unit for proper cooling control operation as follows:

1. Place room thermostat SYSTEM switch in OFF position. Observe that blower motor starts when FAN switch is placed in ON position and shuts down when FAN switch is placed in AUTO position.

2. Place SYSTEM switch in COOL position and FAN switch in AUTO position. Set cooling control below room temperature. Observe that compressor, condenser fan, and evaporator blower motors start. Observe that cooling cycle shuts down when control setting is satisfied. The evaporator fan will continue to run for 90 sec.

3. When using an auto--changeover room thermostat, place both SYSTEM and FAN switches in AUTO positions. Observe that unit operates in Heating mode when temperature control is set to call for heating (above room temperature) and operates in Cooling mode when temperature control is set to call for cooling (below room temperature).

IMPORTANT: Three--phase, scroll compressors are direction oriented. Unit must be checked to ensure proper compressor 3--phase power lead orientation. If not corrected within 5 minutes, the internal protector will shut off the compressor. The 3--phase power leads to the unit must be reversed to correct rotation. When turning backwards, the difference between compressor suction and discharge pressures will be minimal.

Checking and Adjusting Refrigerant Charge

The refrigerant system is fully charged with PuronR (R--410A) refrigerant and is tested and factory sealed. Allow system to operate a minimum of 15 minutes before checking or adjusting charge.

NOTE: Adjustment of the refrigerant charge is not required unless the unit is suspected of not having the proper PuronR (R--410A) charge.

The charging label and the tables shown refer to system temperatures and pressures in cooling mode only. A refrigerant charging label is attached to the inside of the compressor access panel. (See Fig. 19.) The chart includes the required liquid line temperature at given discharge line pressures and outdoor ambient temperatures.

An accurate thermocouple-- or thermistor--type thermometer, and a gauge manifold are required when using the subcooling charging method for evaluating the unit charge. Do not use mercury or small dial--type thermometers because they are not adequate for this type of measurement.

UNIT DAMAGE HAZARD

Failure to follow this caution may result in unit damage. When evaluating the refrigerant charge, an indicated

adjustment to the specified factory charge must always be very minimal. If a substantial adjustment is indicated, an abnormal condition exists somewhere in the cooling system, such as insufficient airflow across either coil or both coils.

Proceed as follows:

1. Remove caps from low-- and high--pressure service fittings.

2. Using hoses with valve core depressors, attach low-- and high--pressure gauge hoses to low-- and high--pressure service fittings, respectively.

3. Start unit in Cooling Mode and let unit run until system pressures stabilize.

4. Measure and record the following:

a. Outdoor ambient--air temperature (°F[°C] db).

b. Liquid line temperature (°F[°C]).

c. Discharge (high--side) pressure (psig).

d. Suction (low--side) pressure (psig) (for reference only).

5. Using “Cooling Charging Charts,” compare outdoor--air temperature(°F[°C] db) with the discharge line pressure (psig) to determine desired system operating liquid line temperature (See Table 7).

6. Compare actual liquid line temperature with desired liquid line temperature. Using a tolerance of ± 2°F(±1.1°C), add refrigerant if actual temperature is more than 2°F(1.1°C) higher than proper liquid line temperature, or remove refrigerant if actual temperature is more than 2°F(1.1°C) lower than required liquid line temperature.

NOTE: If the problem causing the inaccurate readings is a refrigerant leak, refer to the Check for Refrigerant Leaks section.

CAUTION

Indoor Airflow and Airflow Adjustments

CAUTION

UNIT OPERATION HAZARD

Failure to follow this caution may result in unit damage. For cooling operation, the recommended airflow is 350 to

450 cfm for each 12,000 Btuh of rated cooling capacity. For heating operation, the airflow must produce a temperature rise that falls within the range stamped on the unit rating plate.

NOTE: Be sure that all supply--and return--air grilles are open, free from obstructions, and adjusted properly.

WARNING

ELECTRICAL SHOCK HAZARD

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

Disconnect electrical power to the unit and install lockout tag before changing blower speed.

This unit has independent fan speeds for gas heating and cooling. In addition, this unit has the field-selectable capability to run two different cooling fan speeds: A normal cooling fan speed (350~450 CFM/Ton) and an enhanced dehumidification fan speed (As low as

320 CFM/Ton) for use with either a dehumidistat or a thermostat that supports dehumidification.

This unit is factory-set up for use with a single cooling fan speed. The cooling speed is marked “LOW” on the interface fan board (IFB)(See Fig. 17) . The factory-shipped settings are noted in Table 8. There are 3 additional speed tap wires available for use in either gas heating or cooling (For color coding on the indoor fan motor leads, see Table 6). The additional 3 speed tap wires are shipped loose with vinyl caps and are located in the control box, near the interface fan board (IFB) (See Fig. 17).

Gas Heating Fan Speed Set-up

To change the gas heating speed:

1. Remove the vinyl cap off of the desired speed tap wire (Refer to Table 6 for color coding). Table 8 shows the temperature rise associated with each fan speed for a given static pressure. Make sure that the speed chosen delivers a temperature rise within the rise range listed on the unit rating plate.

2. Remove the current speed tap wire from the “GAS HEAT” terminal on the interface fan board (IFB) (Fig.18) and place vinyl cap over the connector on the wire.

3. Connect the desired speed tap wire to the “GAS HEAT” terminal on the interface fan board (IFB).

Single Cooling Fan Speed Set-up (Dehumidification feature not

To change cooling speed:

1. Remove the vinyl cap off of the desired speed tap wire

2. Remove the current speed tap wire from the “LOW”

3. Connect the desired speed tap wire to the “LOW” terminal

used)

(Refer to Table 6 for color coding). Add the wet coil pressure drop in Table 10 to the system static to determine the correct cooling airflow speed in Table 8 that will deliver the nominal cooling airflow as listed in Table 1 for each size.

terminal on the interface fan board (IFB) (See Fig. 17) and place vinyl cap over the connector on the wire.

on the interface fan board (IFB).

Two Cooling Fan Speeds Set-up (Dehumidification feature

IMPORTANT: Dehumidification control must open control

circuit on humidity rise above set point. Use of the dehumidification cooling fan speed requires use of

either a 24 VAC dehumidistat or a thermostat which includes control of a 24 VAC dehumidistat connection. In either case, the dehumidification control must open the control circuit on humidity rise above the dehumidification set point.

used)

1. Remove fan speed tap wire from the “LOW” terminal on the interface fan board (IFB) (See Fig. 17).

2. Determine correct normal cooling fan speed for unit and application. Add the wet coil pressure drop in Table 10 to the system static to determine the correct cooling airflow speed in Table 8 that will deliver the nominal cooling airflow as listed in Table 1 for each size.

3. Remove the vinyl cap off of the desired speed tap wire (Refer to Table 6 for color coding) for the normal cooling fan speed and place desired speed tap wire on “HIGH” on the interface board.

4. Refer to airflow tables (Table 8) to determine allowable speeds for the dehumidification cooling fan speed. In Table 8, speeds that are not allowed for dehumidification cooling are shaded.

5. Remove the vinyl cap off of the desired speed tap wire (Refer to Table 6 for color coding) for the dehumidification cooling fan speed and place desired speed tap wire on the “LOW” connection on the interface board (IFB). Verify

48VL--A

that static pressure is in the acceptable range for the speed tap to be used for dehumidification cooling.

6. Use any spare vinyl plugs to cap any unused speed tap wires.

NOTE: For cooling operation, the recommended airflow is 350 to 450 CFM for each 12,000 Btuh of rated cooling capacity.

Continuous Fan Operation

When the DEHUM feature is not used, the continuous fan speed will be the same as cooling fan speed. When the DEHUM feature is used, the continuous fan will operate on IFB “LOW” speed when the DH control lead is not energized, or IFB “HIGH” speed when the DH lead is energized (see Fig. 17).

Table 6 – Color Coding for Indoor Fan Motor Leads

Black = High Speed

Orange = Med---High Speed

Red=MedSpeed

Pink = Med --- Low Speed

Blue = Low Speed

Cooling Sequence of Operation

With the room thermostat SYSTEM switch in the COOL position and the FAN switch in the AUTO position, the cooling sequence

48VL--A

of operation is as follows:

1. When the room temperature rises to a point that is slightly above the cooling control setting of the thermostat, the thermostat completes the circuit between thermostat terminal R to terminals Y and G.

2. The normally open contacts of energized contactor (C) close and complete the circuit through compressor motor (COMP) to condenser (outdoor) fan motor (OFM). Both motors start instantly.

3. The set of normally open contacts on the interface fan board (IFB) are closed which energizes a circuit to the indoor fan motor (IFM).

NOTE: Once the compressor has started and then stopped, it should not be started again until 5 minutes have elapsed. The cooling cycle remains on until the room temperature drops to a point that is slightly below the cooling control setting of the room thermostat. At this point, the thermostat breaks the circuit between thermostat terminal R to terminals Y and G. These open circuits deenergize contactor coil C. The condenser and compressor motors stop. After a 90--sec. delay, the blower motor stops. The unit is in a standby condition, waiting for the next call for cooling from the room thermostat.

SDL

GAS HEAT

QC6 QC7 QC4 QC3

K2 K1

JW1

Y2/ Y1/

Q1R1LC8RL3

GCR

RI0

D4D6C2OILL

R9 AB A15

D3D5

R3 R5 R6

Y R U C 24VAC

JW7

SSTZ-8

QCB

Fig. 17 -- Interface Fan Board (IFB)

JM6

YDH

JM5

JW3

JW2

COMLOWHIGH

DCR QCR

QC1

RI2

RI DL

R4 RL4

JW4

CDM/C

24VAC/R

3 AMP

A09058

Table7–CoolingChargingChart

48VL--A

A09083

48VL -- A

EXTERNAL STATIC PRESSURE (IN. W.C.)

40 46 56 NA NA NA NA NA NA

22 26 31 NA NA NA NA NA NA

36 39 45 51 NA NA NA NA NA

20 22 25 28 NA NA NA NA NA

32 36 39 44 52 NA NA NA NA

18 20 22 25 29 NA NA NA NA

30 33 36 40 45 52 NA NA NA

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

17 18 20 22 25 29 NA NA NA

NA NA NA NA 31 34 37 41 47

NA NA NA NA 17 19 21 23 26

NA NA NA NA NA NA NA NA NA

52 NA NA NA NA NA NA NA NA

29 NA NA NA NA NA NA NA NA

47 52 NA NA NA NA NA NA NA

26 29 NA NA NA NA NA NA NA

44 48 53 NA NA NA NA NA NA

24 27 29 NA NA NA NA NA NA

36 38 40 43 46 50 54 NA NA

20 21 22 24 25 28 30 NA NA

Table 8 – Dry Coil Air Delivery* -- Horizontal Discharge -- Unit 48VL--A24--60

(

CFM 754 650 538 429 --- --- --- --- --- --- --- --- --- ---

Heating Rise

WIRE

COLOR

Low Blue

SPEED

MOTOR

(

RANGE

HEATING RISE

(

CFM 851 777 675 591 475 --- --- --- --- --- --- --- ---

Heating Rise

M ed --- L ow Pink

(

CFM 941 851 774 684 576 479 --- --- --- --- --- ---

Heating Rise

Red

Medium

30 --- 60

( 17 --- 3 3 )

(

CFM 1009 917 840 759 667 577 447 --- --- --- ---

Heating Rise

Orange

M ed --- H ig h

(

CFM 1241 1167 1111 1036 969 881 818 731 640

Heating Rise

High Black

(

CFM 754 650 538 429 --- --- --- --- --- --- --- --- --- ---

Heating Rise

Low Blue

(

CFM 851 777 675 591 475 --- --- --- --- --- --- --- ---

Heating Rise

M ed --- L ow Pink

(

CFM 941 851 774 684 576 479 --- --- --- --- --- ---

Heating Rise

Red

Medium

25 --- 55

( 14 --- 3 1 )

(

CFM 1009 917 840 759 667 577 447 --- --- --- ---

Heating Rise

(

CFM 1241 1167 1111 1036 969 881 818 731 640

Heating Rise

(

Heating Rise

Black

High

M ed --- H ig h Oran ge

UNIT

48VL( ---,N)A24040

48VL( ---,N)A24060

48VL -- A

EXTERNAL STATIC PRESSURE (IN. W.C.)

41 47 55 NA NA NA NA NA NA

23 26 31 NA NA NA NA NA NA

31 34 37 41 45 56 NA NA NA

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

17 19 20 23 25 31 NA NA NA

NA 30 32 34 38 42 46 54 NA

NA 16 18 19 21 23 26 30 NA

NA NA 30 33 36 40 44 54 NA

NA NA 17 18 20 22 24 30 NA

NA NA NA 30 31 34 37 41 48

NA NA NA 17 17 19 21 23 27

NA NA NA NA NA NA NA NA NA

46 50 54 NA NA NA NA NA NA

25 28 30 NA NA NA NA NA NA

41 43 47 50 NA NA NA NA NA

23 24 26 28 NA NA NA NA NA

39 42 45 49 53 NA NA NA NA

22 23 25 27 29 NA NA NA NA

37 39 41 44 46 50 55 NA NA

21 22 23 24 26 28 30 NA NA

Table 8 -- Dry Coil Air Delivery* -- Horizontal Discharge -- Unit 48VL--A24--60

(

CFM 741 638 547 415 --- --- --- --- --- --- --- --- --- ---

Heating Rise

WIRE

COLOR

Low Blue

SPEED

MOTOR

(

RANGE

HEATING RISE

(

CFM 973 887 823 733 665 538 451 --- --- --- ---

Heating Rise

Pink

M ed --- L ow

(

CFM 1088 1023 954 881 800 723 658 563 461

Heating Rise

Medium Red

30 --- 60

( 17 --- 3 3 )

(

CFM 1140 1064 996 915 840 758 687 564 480

Heating Rise

Orange

M ed --- H ig h

(

CFM 1202 1140 1082 1015 961 881 810 732 631

Heating Rise

High Black

(

CFM 741 638 547 415 --- --- --- --- --- --- --- --- --- ---

Heating Rise

Low Blue

(

CFM 973 887 823 733 665 538 451 --- --- --- ---

Heating Rise

M ed --- L ow Pink

(

CFM 1088 1023 954 881 800 723 658 563 461

Heating Rise

Medium Red

25 --- 55

( 14 --- 3 1 )

(

CFM 1140 1064 996 915 840 758 687 564 480

Heating Rise

Orange

(

CFM 1202 1140 1082 1015 961 881 810 732 631

Heating Rise

(

Heating Rise

Black

High

M ed --- H ig h

UNIT

48VL( ---,N)A30040

48VL( ---,N)A30060

48VL -- A

EXTERNAL STATIC PRESSURE (IN. W.C.)

36 38 41 44 46 50 54 NA NA

20 21 23 24 26 28 30 NA NA

34 36 39 41 43 45 50 54 NA

19 20 21 23 24 25 28 30 NA

33 34 36 38 40 42 45 48 53

18 19 20 21 22 24 25 27 29

28 29 30 31 32 34 35 37 39

15 16 17 17 18 19 20 20 22

27 28 29 30 32 33 35 37 39

15 16 16 17 18 18 19 20 22

55 58 62 NA NA NA NA NA NA

31 32 35 NA NA NA NA NA NA

53 56 59 62 NA NA NA NA NA

29 31 33 35 NA NA NA NA NA

50 53 55 59 62 65 NA NA NA

28 29 31 33 34 36 NA NA NA

42 44 46 48 50 52 54 56 60

24 24 25 26 28 29 30 31 33

42 43 45 46 48 51 53 56 60

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

23 24 25 26 27 28 30 31 33

Table 8 -- Dry Coil Air Delivery* -- Horizontal Discharge -- Unit 48VL--A24--60

(

CFM 1234 1168 1093 1021 961 894 825 759 687

Heating Rise

COLOR

SPEED

(

Blue

Low

WIRE

MOTOR

RANGE

HEATING RISE

(

CFM 1290 1223 1154 1090 1027 977 894 828 762

Heating Rise

M ed --- L ow Pink

(

CFM 1354 1290 1226 1158 1102 1046 981 918 843

Heating Rise

Red

Medium

25 --- 55

( 14 --- 3 1 )

(

CFM 1606 1546 1489 1430 1371 1316 1258 1208 1140

Heating Rise

M ed --- H ig h Oran ge

(

CFM 1630 1580 1517 1463 1407 1339 1277 1210 1131

Heating Rise

High Black

(

CFM 1234 1168 1093 1021 961 894 825 759 687

Heating Rise

Low Blue

(

CFM 1290 1223 1154 1090 1027 977 894 828 762

Heating Rise

M ed --- L ow Pink

(

CFM 1354 1290 1226 1158 1102 1046 981 918 843

Heating Rise

Red

Medium

35 --- 65

( 19 --- 3 6 )

(

CFM 1606 1546 1489 1430 1371 1316 1258 1208 1140

Heating Rise

(

CFM 1630 1580 1517 1463 1407 1339 1277 1210 1131

Heating Rise

(

Heating Rise

Black

High

M ed --- H ig h Oran ge

UNIT

48VL( ---,N)A36060

48VL( ---,N)A36090

48VL -- A

EXTERNAL STATIC PRESSURE (IN. W.C.)

34 36 38 39 41 44 47 49 52

19 20 21 22 23 24 26 27 29

33 35 36 37 39 41 43 46 48

18 19 20 21 22 23 24 25 27

30 31 31 33 34 35 36 38 39

16 17 17 18 19 19 20 21 22

29 30 31 31 33 34 35 36 37

16 17 17 17 18 19 19 20 21

26 27 28 28 29 30 31 32 33

14 15 15 16 16 17 17 18 18

53 55 58 60 63 NA NA NA NA

29 31 32 34 35 NA NA NA NA

51 53 55 57 60 62 NA NA NA

28 29 31 32 33 35 NA NA NA

45 47 48 50 51 53 55 58 60

25 26 27 28 29 29 31 32 33

44 46 47 48 50 52 53 55 57

24 25 26 27 28 29 30 31 32

40 41 42 43 45 46 47 48 50

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

22 23 24 24 25 25 26 27 28

Table 8 -- Dry Coil Air Delivery* -- Horizontal Discharge -- Unit 48VL--A24--60

(

CFM 1295 1234 1182 1126 1075 1016 955 898 857

Heating Rise

COLOR

SPEED

(

Blue

Low

WIRE

MOTOR

RANGE

HEATING RISE

(

CFM 1345 1282 1235 1194 1140 1095 1027 974 921

Heating Rise

M ed --- L ow Pink

(

CFM 1505 1452 1413 1358 1323 1282 1234 1169 1130

Heating Rise

Medium Red

25 --- 55

( 14 --- 3 1 )

(

CFM 1545 1492 1449 1411 1362 1313 1278 1231 1188

Heating Rise

Orange

M ed --- H ig h

(

CFM 1705 1643 1607 1568 1518 1483 1448 1404 1360

Heating Rise

High Black

(

CFM 1295 1234 1182 1126 1075 1016 955 898 857

Heating Rise

Low Blue

(

CFM 1345 1282 1235 1194 1140 1095 1027 974 921

Heating Rise

M ed --- L ow Pink

(

CFM 1505 1452 1413 1358 1323 1282 1234 1169 1130

Heating Rise

Red

Medium

35 --- 65

( 19 --- 3 6 )

(

CFM 1545 1492 1449 1411 1362 1313 1278 1231 1188

Heating Rise

(

CFM 1705 1643 1607 1568 1518 1483 1448 1404 1360

Heating Rise

(

Heating Rise

Orange

High Black

M ed --- H ig h

UNIT

48VL( ---,N)A42060

48VL( ---,N)A42090

48VL -- A

EXTERNAL STATIC PRESSURE (IN. W.C.)

49 50 52 54 56 58 60 63 65

27 28 29 30 31 32 33 35 36

47 48 50 52 53 55 57 59 62

26 27 28 29 29 31 32 33 34

39 40 41 42 44 45 46 48 49

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

22 22 23 24 24 25 26 26 27

NA NA NA NA NA 35 36 36 38

NA NA NA NA NA 19 20 20 21

NA NA NA NA NA NA NA 36 38

NA NA NA NA NA NA NA 20 21

NA NA NA NA NA NA NA NA NA

60 NA NA NA NA NA NA NA NA

33 NA NA NA NA NA NA NA NA

50 51 53 54 56 57 59 NA NA

28 28 29 30 31 32 33 NA NA

40 41 42 43 44 45 46 47 48

22 23 23 24 24 25 25 26 27

37 38 38 39 41 42 44 46 48

21 21 21 22 23 23 24 25 27

Table 8 -- Dry Coil Air Delivery* -- Horizontal Discharge -- Unit 48VL--A24--60

(

CFM 1402 1351 1311 1263 1224 1172 1136 1080 1041

Heating Rise

COLOR

SPEED

(

Blue

Low

WIRE

MOTOR

RANGE

HEATING RISE

(

CFM 1457 1404 1367 1318 1284 1233 1197 1144 1104

Heating Rise

M ed --- L ow Pink

(

CFM 1736 1695 1642 1601 1553 1512 1465 1427 1381

Heating Rise

Red

Medium

35 --- 65

( 19 --- 3 6 )

(

CFM 2149 2111 2062 2026 1980 1945 1905 1864 1793

Heating Rise

M ed --- H ig h Oran ge

(

CFM 2344 2306 2259 2203 2141 2070 1991 1902 1803

Heating Rise

High Black

(

CFM 1402 1351 1311 1263 1224 1172 1136 1080 1041

Heating Rise

Low Blue

(

CFM 1457 1404 1367 1318 1284 1233 1197 1144 1104

Heating Rise

M ed --- L ow Pink

(

CFM 1736 1695 1642 1601 1553 1512 1465 1427 1381

Heating Rise

Red

Medium

30 --- 60

( 17 --- 3 3 )

(

CFM 2149 2111 2062 2026 1980 1945 1905 1864 1793

Heating Rise

(

CFM 2344 2306 2259 2203 2141 2070 1991 1902 1803

Heating Rise

(

Heating Rise

Orange

High Black

M ed --- H ig h

UNIT

48VL( ---,N)A48090

48VL( ---,N)A48115

48VL -- A

EXTERNAL STATIC PRESSURE (IN. W.C.)

55 57 59 60 62 64 NA NA NA

31 32 33 33 34 35 NA NA NA

45 46 47 48 49 50 51 52 54

25 25 26 26 27 28 28 29 30

41 42 43 44 45 47 48 51 53

23 23 24 24 25 26 27 28 30

47 49 51 53 55 57 60 63 NA

26 27 28 29 31 32 33 35 NA

41 42 42 44 45 46 47 48 50

23 23 24 24 25 26 26 27 28

35 36 36 37 38 39 40 41 42

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

NA NA NA NA NA NA NA NA NA

19 20 20 20 21 22 22 23 23

NA NA NA NA NA 35 36 37 38

NA NA NA NA NA 19 20 20 21

NA NA NA NA NA NA NA 35 36

NA NA NA NA NA NA NA 19 20

Table 8 -- Dry Coil Air Delivery* -- Horizontal Discharge -- Unit 48VL--A24--60

(

CFM 1402 1351 1311 1263 1224 1172 1136 1080 1041

Heating Rise

WIRE

COLOR

Low Blue

SPEED

MOTOR

(

RANGE

HEATING RISE

(

CFM 1457 1404 1367 1318 1284 1233 1197 1144 1104

Heating Rise

M ed --- L ow Pink

(

CFM 1736 1695 1642 1601 1553 1512 1465 1427 1381

Heating Rise

Red

Medium

35 --- 65

( 19 --- 3 6 )

(

CFM 2149 2111 2062 2026 1980 1945 1905 1864 1793

Heating Rise

Orange

M ed --- H ig h

(

CFM 2344 2306 2259 2203 2141 2070 1991 1902 1803

Heating Rise

High Black

(

CFM 1445 1389 1341 1281 1236 1189 1139 1072 1027

Heating Rise

Blue

Low

(

CFM 1678 1635 1602 1558 1513 1474 1438 1404 1349

Heating Rise

(

CFM 1962 1915 1880 1843 1794 1753 1711 1675 1628

Heating Rise

(

CFM 2131 2088 2065 2013 1982 1941 1888 1860 1785

Heating Rise

(

CFM 2461 2409 2339 2286 2192 2140 2062 1968 1874

Heating Rise

(

Heating Rise

Red

M ed --- L ow Pink

Medium

35 --- 65

( 19 --- 3 6 )

M ed --- H ig h Oran ge

High Black

UNIT

48VL( ---,N)A48130

48VL( ---,N)A60090

48VL -- A

EXTERNAL STATIC PRESSURE (IN. W.C.)

60 NA NA NA NA NA NA NA NA

33 NA NA NA NA NA NA NA NA

52 53 54 56 57 59 60 NA NA

29 30 30 31 32 33 34 NA NA

44 45 46 47 48 50 51 52 53

25 25 26 26 27 28 28 29 30

41 42 42 43 44 45 46 47 49

23 23 23 24 24 25 26 26 27

35 36 37 38 40 41 42 44 46

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

20 20 21 21 22 23 23 25 26

NA NA NA NA NA NA NA NA NA

57 59 60 62 64 65 NA NA NA

32 33 33 34 35 36 NA NA NA

49 50 51 52 54 55 56 57 59

27 28 28 29 30 31 31 32 33

45 46 47 48 49 50 51 52 54

25 26 26 27 27 28 28 29 30

39 40 41 42 44 45 47 49 51

22 22 23 23 24 25 26 27 29

Table 8 -- Dry Coil Air Delivery* -- Horizontal Discharge -- Unit 48VL--A24--60

(

CFM 1445 1389 1341 1281 1236 1189 1139 1072 1027

Heating Rise

WIRE

COLOR

Low Blue

SPEED

MOTOR

(

RANGE

HEATING RISE

(

CFM 1678 1635 1602 1558 1513 1474 1438 1404 1349

Heating Rise

M ed --- L ow Pink

(

CFM 1962 1915 1880 1843 1794 1753 1711 1675 1628

Heating Rise

Red

Medium

30 --- 60

( 17 --- 3 3 )

(

CFM 2131 2088 2065 2013 1982 1941 1888 1860 1785

Heating Rise

Orange

M ed --- H ig h

(

CFM 2461 2409 2339 2286 2192 2140 2062 1968 1874

Heating Rise

High Black

(

CFM 1445 1389 1341 1281 1236 1189 1139 1072 1027

Heating Rise

Low Blue

(

CFM 1678 1635 1602 1558 1513 1474 1438 1404 1349

Heating Rise

M ed --- L ow Pink

(

CFM 1962 1915 1880 1843 1794 1753 1711 1675 1628

Heating Rise

Red

Medium

35 --- 65

( 19 --- 3 6 )

(

CFM 2131 2088 2065 2013 1982 1941 1888 1860 1785

Heating Rise

(

CFM 2461 2409 2339 2286 2192 2140 2062 1968 1874

Heating Rise

(

Heating Rise

Orange

High Black

M ed --- H ig h

UNIT

48VL( ---,N)A60115

48VL( ---,N)A60130

*Air delivery values are without air filter an d are for dry coil (See 48VL---A Wet Coil Pressu re Drop table).

Factory-shipped h eating speed2Factory-shipped cooling speed

”NA” = Not allowed for h eating speed

Note: Deduct field-supplied air filter pressure drop and wet coil pressure drop to obtain external static pressure available for ducting.

Shaded areas indicate speed/static combinations that are not permitted for dehumidification speed.

Note: Deduct 10% for 208 volt operation.

EXTERNAL STATIC PRESSURE (IN. W.C.)

48VL -- A

37 46 55 NA --- --- --- --- --- ---

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

21 25 30 NA --- --- --- --- --- ---

35 38 44 49 NA NA --- --- --- ---

19 21 24 27 NA NA --- --- --- ---

32 35 40 46 51 NA NA --- --- ---

18 20 22 25 28 NA NA --- --- ---

NA 32 35 38 44 50 59 --- --- ---

NA 18 19 21 24 28 33 --- --- ---

NA NA NA NA 30 32 35 37 43 50

NA NA NA NA 17 18 19 21 24 28

(

Heating Rise

(

CFM 875 787 693 612 498 392 --- --- --- ---

WATTS 101 111 115 125 131 142 --- --- --- ---

CFM 809 664 554 447 --- --- --- --- --- ---

WATTS 85 82 87 95 --- --- --- --- --- ---

BHP 0.09 0.09 0.09 0.10 --- --- --- --- --- ---

Heating Rise

Table 9 – Dry Coil Air Delivery -- Downflow Discharge

WIRE

COLOR

MOTOR

HEATING

SPEED

RISE

RANGE

Low Blue

BHP 0.11 0.12 0.12 0.13 0.14 0.15 --- --- --- ---

Heating Rise

Med-Low Pink

(

CFM 939 860 748 663 591 472 399 --- --- ---

WATTS 119 124 134 138 147 155 164 --- --- ---

Heating Rise

BHP 0.13 0.13 0.14 0.15 0.16 0.17 0.18 --- --- ---

(

CFM 1026 949 873 786 694 604 516 --- --- ---

WATTS 146 151 161 167 177 183 195 --- --- ---

Heating Rise

Red

BHP 0.16 0.16 0.17 0.18 0.19 0.20 0.21 --- --- ---

Heating Rise

Orange

(

CFM 1264 1202 1134 1070 1002 931 870 806 699 610

WATTS 250 261 274 279 290 296 308 319 328 332

Heating Rise

BHP 0.27 0.28 0.29 0.30 0.31 0.32 0.33 0.34 0.35 0.36

Heating Rise

(

Heating Rise

High Black

Medium

30 - 60

(17 - 33

Med-High

UNIT

48VL(-,N)A24040

48VL -- A

EXTERNAL STATIC PRESSURE (IN. W.C.)

37 46 55 68 --- --- --- --- --- ---

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

21 25 30 38 --- --- --- --- --- ---

35 38 44 49 NA NA --- --- --- ---

19 21 24 27 NA NA --- --- --- ---

32 35 40 46 51 NA NA --- --- ---

18 20 22 25 28 NA NA --- --- ---

29 32 35 38 44 50 NA --- --- ---

16 18 19 21 24 28 NA --- --- ---

NA NA NA NA 30 32 35 37 43 50

NA NA NA NA 17 18 19 21 24 28

(

Heating Rise

(

CFM 875 787 693 612 498 392 --- --- --- ---

WATTS 101 111 115 125 131 142 --- --- --- ---

BHP 0.09 0.09 0.09 0.10 --- --- --- --- --- ---

CFM 809 664 554 447 --- --- --- --- --- ---

WATTS 85 82 87 95 --- --- --- --- --- ---

Heating Rise

WIRE

Table 9 -- Dry Coil Air Delivery -- Downflow Discharge (Cont)

COLOR

MOTOR

HEATING

SPEED

RISE

RANGE

Low Blue

BHP 0.11 0.12 0.12 0.13 0.14 0.15 --- --- --- ---

Heating Rise

Med-Low Pink

(

CFM 939 860 748 663 591 472 399 --- --- ---

WATTS 119 124 134 138 147 155 164 --- --- ---

Heating Rise

BHP 0.13 0.13 0.14 0.15 0.16 0.17 0.18 --- --- ---

(

CFM 1026 949 873 786 694 604 516 --- --- ---

WATTS 146 151 161 167 177 183 195 --- --- ---

Heating Rise

Red

BHP 0.16 0.16 0.17 0.18 0.19 0.20 0.21 --- --- ---

Heating Rise

Orange

(

CFM 1264 1202 1134 1070 1002 931 870 806 699 610

WATTS 250 261 274 279 290 296 308 319 328 332

Heating Rise

BHP 0.27 0.28 0.29 0.30 0.31 0.32 0.33 0.34 0.35 0.36

Heating Rise

(

Heating Rise

High Black

Medium

25 - 55

(14 - 31

Med-High

UNIT

48VL(-,N)A24060

EXTERNAL STATIC PRESSURE (IN. W.C.)

48VL -- A

40 45 55 NA --- --- --- --- --- ---

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

22 25 31 NA --- --- --- --- --- ---

30 33 36 41 46 54 NA --- --- ---

17 18 20 23 25 30 NA --- --- ---

27 29 31 34 37 43 49 59 NA ---

15 16 17 19 21 24 27 33 NA ---

NA NA 30 32 35 38 43 49 NA ---

NA NA 17 18 19 21 24 27 NA ---

NA NA NA NA 31 34 37 42 48 ---

NA NA NA NA 17 19 20 23 27 ---

(

Heating Rise

(

CFM 1002 928 842 733 660 560 450 --- --- ---

WATTS 144 155 161 173 185 192 203 --- --- ---

BHP 0.09 0.10 0.10 0.11 --- --- --- --- --- ---

CFM 756 669 548 457 --- --- --- --- --- ---

WATTS 84 90 96 106 --- --- --- --- --- ---

Heating Rise

WIRE

Table 9 -- Dry Coil Air Delivery -- Downflow Discharge (Cont)

COLOR

MOTOR

HEATING

SPEED

RISE

RANGE

Low Blue

BHP 0.15 0.17 0.17 0.19 0.20 0.21 0.22 --- --- ---

Heating Rise

Med-Low Pink

(

CFM 1110 1025 967 879 814 706 611 509 461 ---

WATTS 188 195 205 211 223 236 243 255 243 --- ---

Heating Rise

BHP 0.20 0.21 0.22 0.23 0.24 0.25 0.26 --- --- --- --- --- ---

(

CFM 1160 1091 1004 945 866 804 699 615 496 ---

WATTS 213 225 232 243 249 261 273 285 291 ---

Heating Rise

Red

BHP 0.23 0.24 0.25 0.26 0.27 0.28 0.29 0.31 0.31 ---

Heating Rise

Orange

(

CFM 1240 1173 1110 1031 966 902 821 726 626 ---

WATTS 254 266 274 284 295 302 315 327 331 ---

Heating Rise

BHP 0.27 0.29 0.29 0.30 0.32 0.32 0.34 0.35 0.35 ---

Heating Rise

(

Heating Rise

High Black

Medium

30 - 60

(17 - 33

Med-High

UNIT

48VL(-,N)A30040

48VL -- A

EXTERNAL STATIC PRESSURE (IN. W.C.)

40 45 55 66 66 66 66 66 66 ---

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

22 25 31 37 37 37 37 37 37 ---

30 33 36 41 46 54 NA --- --- ---

17 18 20 23 25 30 NA --- --- ---

27 29 31 34 37 43 49 59 NA ---

15 16 17 19 21 24 27 33 NA ---

NA NA 30 32 35 38 43 49 NA ---

NA NA 17 18 19 21 24 27 NA ---

NA NA NA NA 31 34 37 42 48 ---

NA NA NA NA 17 19 20 23 27 ---

(

Heating Rise

(

CFM 1002 928 842 733 660 560 450 --- --- ---

WATTS 144 155 161 173 185 192 203 --- --- ---

BHP 0.09 0.10 0.10 0.11 --- --- --- --- --- ---

CFM 756 669 548 457 457 457 457 457 457 ---

WATTS 84 90 96 106 --- --- --- --- --- ---

Heating Rise

WIRE

Table 9 -- Dry Coil Air Delivery -- Downflow Discharge (Cont)

COLOR

MOTOR

HEATING

SPEED

RISE

RANGE

Low Blue

BHP 0.15 0.17 0.17 0.19 0.20 0.21 0.22 --- --- ---

Heating Rise

Med-Low Pink

(

CFM 1110 1025 967 879 814 706 611 509 461 ---

WATTS 188 195 205 211 223 236 243 255 243 ---

Heating Rise

BHP 0.20 0.21 0.22 0.23 0.24 0.25 0.26 0.27 0.26 ---

(

CFM 1160 1091 1004 945 866 804 699 615 496 --- ---

WATTS 213 225 232 243 249 261 273 285 291 --- ---

Heating Rise

Red

BHP 0.23 0.24 0.25 0.26 0.27 0.28 0.29 0.31 0.31 --- ---

Heating Rise

Orange

(

CFM 1240 1173 1110 1031 966 902 821 726 626 ---

WATTS 254 266 274 284 295 302 315 327 331 ---

Heating Rise

BHP 0.27 0.29 0.29 0.30 0.32 0.32 0.34 0.35 0.35 ---

Heating Rise

(

Heating Rise

High Black

Medium

25 - 55

(14 - 31

Med-High

UNIT

48VL(-,N)A30060

EXTERNAL STATIC PRESSURE (IN. W.C.)

48VL -- A

NA 25 26 28 29 30 32 35 37 40

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

NA 14 15 15 16 17 18 19 20 22

NA NA 25 26 28 29 30 32 34 36

NA NA 14 15 15 16 17 18 19 20

NA NA NA 25 26 27 28 30 31 33

NA NA NA 14 14 15 16 16 17 18

NA NA NA NA NA NA NA NA 25 26

NA NA NA NA NA NA NA NA 14 14

NA NA NA NA NA NA NA NA NA 26

NA NA NA NA NA NA NA NA NA 14

(

Heating Rise

(

CFM 1312 1260 1203 1153 1095 1050 995 943 889 829

WATTS 314 324 329 340 344 355 361 372 382 387

BHP 0.31 0.31 0.32 0.33 0.34 0.34 0.35 0.36 0.37 0.38

CFM 1277 1215 1147 1094 1045 992 932 874 826 757

WATTS 285 289 299 305 314 319 328 335 347 352

Heating Rise

WIRE

Table 9 -- Dry Coil Air Delivery -- Downflow Discharge (Cont)

COLOR

MOTOR

HEATING

SPEED

RISE

RANGE

Low Blue

BHP 0.34 0.35 0.35 0.36 0.37 0.38 0.39 0.40 0.41 0.42

Heating Rise

Med-Low Pink

(

CFM 1381 1326 1269 1212 1161 1121 1070 1019 974 912

WATTS 358 365 375 383 391 395 406 418 424 434

Heating Rise

BHP 0.38 0.39 0.40 0.41 0.42 0.42 0.44 0.45 0.45 0.47

Heating Rise

Red

(

CFM 1631 1579 1525 1477 1423 1372 1336 1284 1233 1166

WATTS 567 576 581 592 598 609 617 619 613 598

Heating Rise

BHP 0.61 0.62 0.62 0.63 0.64 0.65 0.66 0.66 0.66 0.64

Heating Rise

(

CFM 1681 1633 1575 1526 1478 1415 1366 1312 1249 1159

WATTS 618 626 636 644 652 653 649 642 627 602

Heating Rise

BHP 0.66 0.67 0.68 0.69 0.70 0.70 0.70 0.69 0.67 0.65

Heating Rise

(

Heating Rise

Orange

High Black

Medium

25 - 55

(14 - 31

Med-High

UNIT

48VL(-,N)A36060

48VL -- A

EXTERNAL STATIC PRESSURE (IN. W.C.)

NA 25 26 28 29 30 32 35 37 40

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

NA 14 15 15 16 17 18 19 20 22

NA NA 25 26 28 29 30 32 34 36

NA NA 14 15 15 16 17 18 19 20

NA NA NA 25 26 27 28 30 31 33

NA NA NA 14 14 15 16 16 17 18

NA NA NA NA NA NA NA NA 25 26

NA NA NA NA NA NA NA NA 14 14

NA NA NA NA NA NA NA NA NA 26

NA NA NA NA NA NA NA NA NA 14

(

Heating Rise

(

CFM 1312 1260 1203 1153 1095 1050 995 943 889 829

WATTS 314 324 329 340 344 355 361 372 382 387

BHP 0.31 0.31 0.32 0.33 0.34 0.34 0.35 0.36 0.37 0.38

CFM 1277 1215 1147 1094 1045 992 932 874 826 757

WATTS 285 289 299 305 314 319 328 335 347 352

Heating Rise

WIRE

Table 9 -- Dry Coil Air Delivery -- Downflow Discharge (Cont)

COLOR

MOTOR

HEATING

SPEED

RISE

RANGE

Low Blue

BHP 0.34 0.35 0.35 0.36 0.37 0.38 0.39 0.40 0.41 0.42

Heating Rise

Med-Low Pink

(

CFM 1381 1326 1269 1212 1161 1121 1070 1019 974 912

WATTS 358 365 375 383 391 395 406 418 424 434

Heating Rise

BHP 0.38 0.39 0.40 0.41 0.42 0.42 0.44 0.45 0.45 0.47

Heating Rise

Red

(

CFM 1631 1579 1525 1477 1423 1372 1336 1284 1233 1166

WATTS 567 576 581 592 598 609 617 619 613 598

Heating Rise

BHP 0.61 0.62 0.62 0.63 0.64 0.65 0.66 0.66 0.66 0.64

Heating Rise

(

CFM 1681 1633 1575 1526 1478 1415 1366 1312 1249 1159

WATTS 618 626 636 644 652 653 649 642 627 602

Heating Rise

BHP 0.66 0.67 0.68 0.69 0.70 0.70 0.70 0.69 0.67 0.65

Heating Rise

(

Heating Rise

Orange

High Black

Medium

35 - 65

(19 - 36

Med-High

UNIT

48VL(-,N)A36090

EXTERNAL STATIC PRESSURE (IN. W.C.)

48VL -- A

NA 34 35 36 38 39 41 43 45 47

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

NA 19 19 20 21 22 23 24 25 26

NA NA NA 34 35 37 39 40 42 44

NA NA NA 19 20 21 21 22 23 24

NA NA NA NA NA NA NA 34 36 37

NA NA NA NA NA NA NA 19 20 20

NA NA NA NA NA NA NA NA 34 35

NA NA NA NA NA NA NA NA 19 20

NA NA NA NA NA NA NA NA NA NA

(

Heating Rise

(

CFM 1425 1384 1339 1301 1254 1199 1151 1104 1065 1015

WATTS 197 210 223 235 248 257 271 284 296 305

BHP 0.19 0.20 0.22 0.23 0.24 0.25 0.27 0.28 0.29 0.30

CFM 1365 1324 1284 1233 1181 1127 1084 1039 984 939

WATTS 177 189 201 210 222 236 248 261 269 281

Heating Rise

WIRE

Table 9 -- Dry Coil Air Delivery -- Downflow Discharge (Cont)

COLOR

SPEED

MOTOR

RISE

RANGE

HEATING

Blue

Low

BHP 0.21 0.23 0.24 0.25 0.27 0.28 0.29 0.30 0.32 0.33

Heating Rise

Med-Low Pink

(

CFM 1582 1549 1509 1469 1433 1392 1346 1300 1249 1213

WATTS 267 280 294 308 322 336 344 359 374 387

Heating Rise

BHP 0.29 0.30 0.32 0.33 0.35 0.36 0.37 0.38 0.40 0.42

Heating Rise

(

CFM 1623 1586 1553 1511 1470 1433 1393 1350 1309 1261

WATTS 285 299 312 324 335 349 363 378 393 407

Heating Rise

BHP 0.31 0.32 0.33 0.35 0.36 0.37 0.39 0.41 0.42 0.44

Heating Rise

(

CFM 1775 1736 1696 1660 1622 1588 1557 1516 1472 1426

WATTS 371 386 401 410 424 439 453 468 483 497

Heating Rise

BHP 0.40 0.41 0.43 0.44 0.45 0.47 0.49 0.50 0.52 0.53

Heating Rise

(

Heating Rise

Orange

Medium Red

25 - 55

(14 - 31

Med-High

High Black

UNIT

48VL(-,N)A42060

48VL -- A

EXTERNAL STATIC PRESSURE (IN. W.C.)

NA 34 35 36 38 39 41 43 45 47

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

NA 19 19 20 21 22 23 24 25 26

NA NA NA 34 35 37 39 40 42 44

NA NA NA 19 20 21 21 22 23 24

NA NA NA NA NA NA NA 34 36 37

NA NA NA NA NA NA NA 19 20 20

NA NA NA NA NA NA NA NA 34 35

NA NA NA NA NA NA NA NA 19 20

NA NA NA NA NA NA NA NA NA NA

(

Heating Rise

(

CFM 1425 1384 1339 1301 1254 1199 1151 1104 1065 1015

WATTS 197 210 223 235 248 257 271 284 296 305

BHP 0.19 0.20 0.22 0.23 0.24 0.25 0.27 0.28 0.29 0.30

CFM 1365 1324 1284 1233 1181 1127 1084 1039 984 939

WATTS 177 189 201 210 222 236 248 261 269 281

Heating Rise

WIRE

Table 9 -- Dry Coil Air Delivery -- Downflow Discharge (Cont)

COLOR

SPEED

MOTOR

RISE

RANGE

HEATING

Blue

Low

BHP 0.21 0.23 0.24 0.25 0.27 0.28 0.29 0.30 0.32 0.33

Heating Rise

Med-Low Pink

(

CFM 1582 1549 1509 1469 1433 1392 1346 1300 1249 1213

WATTS 267 280 294 308 322 336 344 359 374 387

Heating Rise

BHP 0.29 0.30 0.32 0.33 0.35 0.36 0.37 0.38 0.40 0.42

Heating Rise

(

CFM 1623 1586 1553 1511 1470 1433 1393 1350 1309 1261

WATTS 285 299 312 324 335 349 363 378 393 407

Heating Rise

BHP 0.31 0.32 0.33 0.35 0.36 0.37 0.39 0.41 0.42 0.44

Heating Rise

(

CFM 1775 1736 1696 1660 1622 1588 1557 1516 1472 1426

WATTS 371 386 401 410 424 439 453 468 483 497

Heating Rise

BHP 0.40 0.41 0.43 0.44 0.45 0.47 0.49 0.50 0.52 0.53

Heating Rise

(

Heating Rise

Orange

Medium Red

35 - 65

(19 - 36

Med-High

High Black

UNIT

48VL(-,N)A42090

EXTERNAL STATIC PRESSURE (IN. W.C.)

48VL -- A

45 47 48 49 51 53 55 57 59 61

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

25 26 27 27 28 29 30 32 33 34

44 45 47 47 49 51 52 54 56 58

24 25 26 26 27 28 29 30 31 32

37 37 38 39 40 40 41 42 43 44

20 21 21 21 22 22 23 23 24 25

29 30 30 30 31 31 32 33 34 36

NA NA NA NA NA 17 18 18 19 20

27 27 28 28 29 30 31 32 33 35

NA NA NA NA NA NA NA 18 19 19

(

Heating Rise

(

CFM 1556 1508 1461 1432 1388 1346 1302 1256 1221 1168

WATTS 244 261 268 281 290 305 319 330 345 353

BHP 0.24 0.25 0.26 0.27 0.29 0.30 0.31 0.33 0.34 0.35

CFM 1503 1457 1423 1374 1330 1287 1241 1199 1153 1111

WATTS 225 233 246 254 269 282 292 307 314 329

Heating Rise

WIRE

Table 9 -- Dry Coil Air Delivery -- Downflow Discharge (Cont)

COLOR

SPEED

MOTOR

RISE

RANGE

HEATING

Blue

Low

BHP 0.26 0.28 0.29 0.30 0.31 0.33 0.34 0.35 0.37 0.38

Heating Rise

Med-Low Pink

(

CFM 1861 1822 1786 1758 1716 1688 1660 1619 1583 1539

WATTS 400 417 426 441 452 467 482 492 507 519

Heating Rise

BHP 0.43 0.45 0.46 0.47 0.48 0.50 0.52 0.53 0.54 0.56

Heating Rise

(

CFM 2319 2291 2255 2230 2193 2166 2118 2057 1992 1887

WATTS 758 769 787 799 808 823 822 805 780 737

Heating Rise

BHP 0.81 0.82 0.84 0.86 0.87 0.88 0.88 0.86 0.84 0.79

Heating Rise

(

CFM 2532 2487 2444 2391 2330 2259 2179 2111 2033 1949

WATTS 1014 1022 1015 994 965 935 898 858 823 786

Heating Rise

BHP 1.09 1.10 1.09 1.07 1.03 1.00 0.96 0.92 0.88 0.84

Heating Rise

(

Heating Rise

Red

High Black

Medium

35 - 65

(19 - 36

Med-High Orange

UNIT

48VL(-,N)A48090

48VL -- A

EXTERNAL STATIC PRESSURE (IN. W.C.)

45 47 48 49 51 53 55 57 59 61

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

25 26 27 27 28 29 30 32 33 34

44 45 47 47 49 51 52 54 56 58

24 25 26 26 27 28 29 30 31 32

37 37 38 39 40 40 41 42 43 44

20 21 21 21 22 22 23 23 24 25

NA NA NA NA NA 31 32 33 34 36

NA NA NA NA NA 17 18 18 19 20

NA NA NA NA NA NA NA 32 33 35

NA NA NA NA NA NA NA 18 19 19

(

Heating Rise

(

CFM 1556 1508 1461 1432 1388 1346 1302 1256 1221 1168

WATTS 244 261 268 281 290 305 319 330 345 353

BHP 0.24 0.25 0.26 0.27 0.29 0.30 0.31 0.33 0.34 0.35

CFM 1503 1457 1423 1374 1330 1287 1241 1199 1153 1111

WATTS 225 233 246 254 269 282 292 307 314 329

Heating Rise

WIRE

Table 9 -- Dry Coil Air Delivery -- Downflow Discharge (Cont)

COLOR

SPEED

MOTOR

RISE

RANGE

HEATING

Blue

Low

BHP 0.26 0.28 0.29 0.30 0.31 0.33 0.34 0.35 0.37 0.38

Heating Rise

Med-Low Pink

(

CFM 1861 1822 1786 1758 1716 1688 1660 1619 1583 1539

WATTS 400 417 426 441 452 467 482 492 507 519

Heating Rise

BHP 0.43 0.45 0.46 0.47 0.48 0.50 0.52 0.53 0.54 0.56

Heating Rise

(

CFM 2319 2291 2255 2230 2193 2166 2118 2057 1992 1887

WATTS 758 769 787 799 808 823 822 805 780 737

Heating Rise

BHP 0.81 0.82 0.84 0.86 0.87 0.88 0.88 0.86 0.84 0.79

Heating Rise

(

CFM 2532 2487 2444 2391 2330 2259 2179 2111 2033 1949

WATTS 1014 1022 1015 994 965 935 898 858 823 786

Heating Rise

BHP 1.09 1.10 1.09 1.07 1.03 1.00 0.96 0.92 0.88 0.84

Heating Rise

(

Heating Rise

Red

High Black

Medium

30 - 60

(17 - 33

Med-High Orange

UNIT

48VL(-,N)A48115

EXTERNAL STATIC PRESSURE (IN. W.C.)

48VL -- A

45 47 48 49 51 53 55 57 59 61

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

25 26 27 27 28 29 30 32 33 34

44 45 47 47 49 51 52 54 56 58

24 25 26 26 27 28 29 30 31 32

37 37 38 39 40 40 41 42 43 44

20 21 21 21 22 22 23 23 24 25

NA NA NA NA NA 31 32 33 34 36

NA NA NA NA NA 17 18 18 19 20

NA NA NA NA NA NA NA 32 33 35

NA NA NA NA NA NA NA 18 19 19

(

Heating Rise

(

CFM 1556 1508 1461 1432 1388 1346 1302 1256 1221 1168

WATTS 244 261 268 281 290 305 319 330 345 353

BHP 0.24 0.25 0.26 0.27 0.29 0.30 0.31 0.33 0.34 0.35

CFM 1503 1457 1423 1374 1330 1287 1241 1199 1153 1111

WATTS 225 233 246 254 269 282 292 307 314 329

Heating Rise

WIRE

Table 9 -- Dry Coil Air Delivery -- Downflow Discharge (Cont)

COLOR

SPEED

MOTOR

RISE

RANGE

HEATING

Blue

Low

BHP 0.26 0.28 0.29 0.30 0.31 0.33 0.34 0.35 0.37 0.38

Heating Rise

Med-Low Pink

(

CFM 1861 1822 1786 1758 1716 1688 1660 1619 1583 1539

WATTS 400 417 426 441 452 467 482 492 507 519

Heating Rise

BHP 0.43 0.45 0.46 0.47 0.48 0.50 0.52 0.53 0.54 0.56

Heating Rise

(

CFM 2319 2291 2255 2230 2193 2166 2118 2057 1992 1887

WATTS 758 769 787 799 808 823 822 805 780 737

Heating Rise

BHP 0.81 0.82 0.84 0.86 0.87 0.88 0.88 0.86 0.84 0.79

Heating Rise

(

CFM 2532 2487 2444 2391 2330 2259 2179 2111 2033 1949

WATTS 1014 1022 1015 994 965 935 898 858 823 786

Heating Rise

BHP 1.09 1.10 1.09 1.07 1.03 1.00 0.96 0.92 0.88 0.84

Heating Rise

(

Heating Rise

Red

High Black

Medium

35 - 65

(19 - 36

Med-High Orange

UNIT

48VL(-,N)A48130

48VL -- A

EXTERNAL STATIC PRESSURE (IN. W.C.)

46 47 49 51 52 54 56 59 NA NA

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

26 26 27 28 29 30 31 33 NA NA

37 38 39 39 40 41 42 43 45 46

21 21 21 22 22 23 23 24 25 26

35 36 36 37 38 38 39 40 41 42

19 20 20 21 21 21 22 22 23 23

NA NA NA NA NA 34 35 35 37 39

NA NA NA NA NA 19 19 20 20 22

NA NA NA NA NA NA NA 34 35 38

NA NA NA NA NA NA NA 19 20 21

(

Heating Rise

(

CFM 1841 1796 1761 1724 1690 1651 1616 1578 1527 1478

WATTS 425 434 453 460 476 485 501 508 525 542

BHP 0.24 0.26 0.26 0.28 0.29 0.30 0.32 0.33 0.34 0.35

CFM 1479 1436 1387 1346 1298 1253 1206 1160 1114 1061

WATTS 224 239 247 262 270 284 300 307 319 330

Heating Rise

WIRE

Table 9 -- Dry Coil Air Delivery -- Downflow Discharge (Cont)

COLOR

SPEED

MOTOR

RISE

RANGE

HEATING

Blue

Low

BHP 0.46 0.47 0.49 0.49 0.51 0.52 0.54 0.54 0.56 0.58

Heating Rise

Med-Low Pink

(

CFM 1944 1913 1872 1838 1801 1771 1731 1698 1655 1613

WATTS 486 501 511 529 537 554 565 578 595 603

Heating Rise

BHP 0.52 0.54 0.55 0.57 0.58 0.59 0.61 0.62 0.64 0.65

Heating Rise

(

CFM 2178 2148 2105 2073 2036 2002 1967 1919 1845 1751

WATTS 674 691 703 717 733 743 758 754 734 701

Heating Rise

BHP 0.72 0.74 0.75 0.77 0.79 0.80 0.81 0.81 0.79 0.75

Heating Rise

(

CFM 2480 2432 2375 2322 2236 2161 2085 2006 1917 1808

WATTS 1029 1012 995 975 941 908 869 836 796 751

Heating Rise

BHP 1.10 1.09 1.07 1.05 1.01 0.97 0.93 0.90 0.85 0.81

Heating Rise

(

Heating Rise

Red

High Black

Medium

35 - 65

(19 - 36

Med-High Orange

UNIT

48VL(-,N)A60090

EXTERNAL STATIC PRESSURE (IN. W.C.)

48VL -- A

46 47 49 51 52 54 56 59 NA NA

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

26 26 27 28 29 30 31 33 NA NA

37 38 39 39 40 41 42 43 45 46

21 21 21 22 22 23 23 24 25 26

35 36 36 37 38 38 39 40 41 42

19 20 20 21 21 21 22 22 23 23

NA NA NA NA NA 34 35 35 37 39

NA NA NA NA NA 19 19 20 20 22

NA NA NA NA NA NA NA 34 35 38

NA NA NA NA NA NA NA 19 20 21

(

Heating Rise

(

CFM 1841 1796 1761 1724 1690 1651 1616 1578 1527 1478

WATTS 425 434 453 460 476 485 501 508 525 542

BHP 0.24 0.26 0.26 0.28 0.29 0.30 0.32 0.33 0.34 0.35

CFM 1479 1436 1387 1346 1298 1253 1206 1160 1114 1061

WATTS 224 239 247 262 270 284 300 307 319 330

Heating Rise

WIRE

Table 9 -- Dry Coil Air Delivery -- Downflow Discharge (Cont)

COLOR

SPEED

MOTOR

RISE

RANGE

HEATING

Blue

Low

BHP 0.46 0.47 0.49 0.49 0.51 0.52 0.54 0.54 0.56 0.58

Heating Rise

Med-Low Pink

(

CFM 1944 1913 1872 1838 1801 1771 1731 1698 1655 1613

WATTS 486 501 511 529 537 554 565 578 595 603

Heating Rise

BHP 0.52 0.54 0.55 0.57 0.58 0.59 0.61 0.62 0.64 0.65

Heating Rise

(

CFM 2178 2148 2105 2073 2036 2002 1967 1919 1845 1751

WATTS 674 691 703 717 733 743 758 754 734 701

Heating Rise

BHP 0.72 0.74 0.75 0.77 0.79 0.80 0.81 0.81 0.79 0.75

Heating Rise

(

CFM 2480 2432 2375 2322 2236 2161 2085 2006 1917 1808

WATTS 1029 1012 995 975 941 908 869 836 796 751

Heating Rise

BHP 1.10 1.09 1.07 1.05 1.01 0.97 0.93 0.90 0.85 0.81

Heating Rise

(

Heating Rise

Red

High Black

Medium

30 - 60

(17 - 33

Med-High Orange

UNIT

48VL(-,N)A60115

48VL -- A

EXTERNAL STATIC PRESSURE (IN. W.C.)

46 47 49 51 52 54 56 59 NA NA

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

26 26 27 28 29 30 31 33 NA NA

37 38 39 39 40 41 42 43 45 46

21 21 21 22 22 23 23 24 25 26

35 36 36 37 38 38 39 40 41 42

19 20 20 21 21 21 22 22 23 23

NA NA NA NA NA 34 35 35 37 39

NA NA NA NA NA 19 19 20 20 22

NA NA NA NA NA NA NA 34 35 38

NA NA NA NA NA NA NA 19 20 21

(

Heating Rise

(

CFM 1841 1796 1761 1724 1690 1651 1616 1578 1527 1478

WATTS 425 434 453 460 476 485 501 508 525 542

BHP 0.24 0.26 0.26 0.28 0.29 0.30 0.32 0.33 0.34 0.35

CFM 1479 1436 1387 1346 1298 1253 1206 1160 1114 1061

WATTS 224 239 247 262 270 284 300 307 319 330

Heating Rise

WIRE

Table 9 -- Dry Coil Air Delivery -- Downflow Discharge (Cont)

COLOR

SPEED

MOTOR

RISE

RANGE

HEATING

Blue

Low

BHP 0.46 0.47 0.49 0.49 0.51 0.52 0.54 0.54 0.56 0.58

Heating Rise

Med-Low Pink

(

CFM 1944 1913 1872 1838 1801 1771 1731 1698 1655 1613

WATTS 486 501 511 529 537 554 565 578 595 603

Heating Rise

BHP 0.52 0.54 0.55 0.57 0.58 0.59 0.61 0.62 0.64 0.65

Heating Rise

(

CFM 2178 2148 2105 2073 2036 2002 1967 1919 1845 1751

WATTS 674 691 703 717 733 743 758 754 734 701

Heating Rise

BHP 0.72 0.74 0.75 0.77 0.79 0.80 0.81 0.81 0.79 0.75

Heating Rise

(

CFM 2480 2432 2375 2322 2236 2161 2085 2006 1917 1808

WATTS 1029 1012 995 975 941 908 869 836 796 751

Heating Rise

BHP 1.10 1.09 1.07 1.05 1.01 0.97 0.93 0.90 0.85 0.81

Heating Rise

(

Heating Rise

Red

High Black

Medium

35 - 65

(19 - 36

Med-High Orange

Shaded areas indicate speed/static combinations that are not permitted for dehumidification speed.

UNIT

48VL(-,N)A60130

Factory-shipped heating speed2Factory-shipped cooling speed

”NA” = Not allowed for heating speed

*Air delivery values are without air filter and are for dry coil (See 48VL Wet Coil Pressure Drop table).

NOTE: Deduct field-supplied air filter pressure drop and wet coil pressure drop to obtain external static pressure available for ducting.

48VL -- A

STANDARD CFM (SCFM)

Table 10 – Wet Coil Pressure Drop (IN. W.C.)

Table 12 – Filter Pressure Drop Table (IN. W.C.)

Table 11 – Economizer with 1--in. Filter Pressure Drop (IN. W.C.)

-- -- 0.09 0.14 0.16 0.18 0.25 0.28 0.30 -- -- -- -- -- -- -- --

600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200

2.0,

TONS

COOLING

-- -- -- -- -- -- 0.10 0.11 0.12 0.13 0.14 0.16 0.16 -- -- -- --

3.0

2.5,

3.5,

5.0 -- -- -- -- -- -- -- -- -- 0.15 0.17 0.18 0.20 0.21 0.22 0.23 0.23

4.0

600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200

2.0,

TONS

COOLING

-- -- -- -- -- -- 0.07 0.08 0.09 0.09 0.10 0.11 0.12 -- -- -- --

0.03 0.05 0.06 0.08 0.10 0.11 0.13 0.14 0.16 -- -- -- -- -- -- -- --

3.0

2.5,

3.5,

5.0 -- -- -- -- -- -- -- -- -- 0.04 0.06 0.08 0.10 0.11 0.13 0.14 0.15

4.0

600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200

24 0.03 0.04 0.04 0.05 0.06

30 0.05 0.06 0.07 0.08 0.11

36 0.06 0.06 0.09 0.10 0.11 0.14

42 0.05 0.05 0.06 0.07 0.08 0.08 0.09 0.09 0.11

48 0.04 0.06 0.09 0.10 0.10 0.11 0.12 0.13 0.14

UNIT

SIZE

60 0.06 0.07 0.01 0.08 0.09 0.10 0.12 0.13

600-1400 CFM

12x20x1+12x20x1

FILTER SIZE IN. (MM)

(305x508x25+305x508x25)

1200-1800 CFM

16x24x1+14x24x1

(406x610x25+356x610x25)

1500-2200 CFM

16x24x1+18x24x1

(406x610x25+457x610x25)

600-1400 CFM

1200-1800 CFM

1500-2200 CFM

16x24x1+14x24x1

(406x610x25+356x610x25)

16x24x1+18x24x1

(406x610x25+457x610x25)

12x20x1+12x20x1

FILTER SIZE IN. (MM)

(305x508x25+305x508x25)

MAINTENANCE

To ensure continuing high performance and to minimize the possibility of premature equipment failure, periodic maintenance must be performed on this equipment. This unit should be inspected at least once each year by a qualified service person. To troubleshoot unit, refer to Table 13--15, Troubleshooting Chart.

NOTE TO EQUIPMENT OWNER: Consult your local dealer about the availability of a maintenance contract.

WARNING

PERSONAL INJURY AND UNIT DAMAGE HAZARD

Failure to follow this warning could result in personal injury or death and unit component damage.

The ability to properly perform maintenance on this equipment requires certain expertise, mechanical skills, tools and equipment. If you do not possess these, do not attempt to perform any maintenance on this equipment, other than those procedures recommended in the Owner’s

48VL--A

Manual.

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow these warnings could result in personal injury or death:

1. Turn off electrical power to the unit and install lock out tag before performing any maintenance or service on this unit.

2. Use extreme caution when removing panels and parts.

3. Never place anything combustible either on or in contact with the unit.

3. Inspect blower motor and wheel for cleanliness at the beginning of each heating and cooling season. Clean when necessary. For first heating and cooling season, inspect blower wheel bi--monthly to determine proper cleaning frequency.

4. Check electrical connections for tightness and controls for proper operation each heating and cooling season. Service when necessary.

5. Ensure electric wires are not in contact with refrigerant tubing or sharp metal edges.

6. Check and inspect heating section before each heating season. Clean and adjust when necessary.

7. Check flue hood and remove any obstructions, if necessary.

Air Filter

IMPORTANT: Never operate the unit without a suitable air filter

in the return--air duct system. Always replace the filter with the same dimensional size and type as originally installed. See Table 1 for recommended filter sizes.

Inspect air filter(s) at least once each month and replace (throwaway--type) or clean (cleanable--type) at least twice during each cooling season and twice during the heating season, or whenever the filter becomes clogged with dust and lint.

Indoor Blower and Motor

NOTE: All motors are pre--lubricated. Do not attempt to lubricate

these motors. For longer life, operating economy, and continuing efficiency,

clean accumulated dirt and grease from the blower wheel and motor annually.

WARNING

ELECTRICAL SHOCK HAZARD

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

Disconnect and tag electrical power to the unit before cleaning the blower motor and wheel.

CAUTION

UNIT OPERATION HAZARD

Failure to follow this caution may result in improper operation.

Errors made when reconnecting wires may cause improper and dangerous operation. Label all wires prior to disconnecting when servicing.

ENVIRONMENTAL HAZARD

Failure to follow this caution may result in environmental pollution.

Remove and re--cycle all components or materials (i.e. oil, refrigerant, etc) before unit final disposal.

The minimum maintenance requirements for this equipment are as follows:

1. Inspect air filter(s) each month. Clean or replace when necessary.

2. Inspect indoor coil, drain pan, and condensate drain each cooling season for cleanliness. Clean when necessary.

CAUTION

To clean the blower motor and wheel:

1. Remove and disassemble blower assembly as follows: a. Remove blower access panel (see Fig. 19).

b. Disconnect 5 pin plug and 4 pin plug from indoor

blower motor. Remove capacitor if required.

c. On all units remove blower assembly from unit.

Remove screws securing blower to blower partition and slide assembly out. Be careful not to tear insulation in blower compartment.

d. Ensure proper reassembly by marking blower wheel and

motor in relation to blower housing before disassembly.

e. Loosen setscrew(s) that secures wheel to motor shaft,

remove screws that secure motor mount brackets to housing, and slide motor and motor mount out of housing.

2. Remove and clean blower wheel as follows: a. Ensure proper reassembly by marking wheel orientation.

b. Lift wheel from housing. When handling and/or

cleaning blower wheel, be sure not to disturb balance weights (clips) on blower wheel vanes.

c. Remove caked--on dirt from wheel and housing with a

brush. Remove lint and/or dirt accumulations from wheel and housing with vacuum cleaner, using soft brush attachment. Remove grease and oil with mild solvent.

d. Reassemble wheel into housing.

e. Reassemble motor into housing. Be sure setscrews are

tightened on motor shaft flats and not on round part of shaft. Reinstall blower into unit. Reinstall capacitor.

f. Connect 5 pin plug and 4 pin plug to indoor blower

motor.

g. Reinstall blower access panel (see Fig. 19).

3. Restore electrical power to unit. Start unit and check for proper blower rotation and motor speeds during heating and cooling cycles.

Induced Draft (combustion air) Blower Assembly

The induced--draft blower assembly consists of the inducer motor, the blower housing, and the induced--draft blower wheel.

Clean periodically to assure proper airflow and heating efficiency. Inspect blower wheel every fall and periodically during the heating season. For the first heating season, inspect blower wheel bimonthly to determine proper cleaning frequency.

To inspect blower wheel, remove draft hood assembly. Shine a flashlight into opening to inspect wheel. If cleaning is required, remove induced--draft blower assembly as follows:

1. Remove control access panel (See Fig. 19).

2. Remove the 5 screws that attach induced--draft blower assembly to the flue collector box cover.

3. Slide the assembly out of the unit. (See Fig. 21). Clean the blower wheel. If additional cleaning is required, continue with Steps 4 and 5.

4. To remove blower wheel, remove 2 setscrews.

5. To remove inducer motor, remove screws that hold the inducer motor to the blower housing.

6. To reinstall, reverse the procedure outlined above.

Flue Gas Passageways

To inspect the flue collector box and upper areas of the heat exchanger:

1. Remove the induced draft blower assembly according to directions in the Induced Draft Blower Assembly section.

2. Remove the 11 screws holding the flue collector box cover (See Fig. 18) to the heat exchanger assembly. Inspect the heat exchangers.

3. Clean all surfaces, as required, using a wire brush.

Limit Switch

Remove blower access panel (see Fig. 19). Limit switch is located on the fan partition.

Burner Ignition

Unit is equipped with a direct spark ignition 100 percent lockout system. Ignition module (IGC) is located in the control box (See Fig. 18). Module contains a self--diagnostic LED. During servicing, refer to label diagram or Table 5 in these instructions for LED interpretation.

If lockout occurs, unit may be reset by either momentarily interrupting power supply to unit or by turning selector switch to OFF position at the thermostat.

Main Burners

At the beginning of each heating season, inspect for deterioration or blockage due to corrosion or other causes. Observe the main burner flames and adjust, if necessary.

Removal of Gas T To remove the gas train for servicing:

1. Shut off main gas valve.

2. Shut off power to unit and install lockout tag.

3. Remove control access panel (See Fig. 19).

4. Disconnect gas piping at unit gas valve.

5. Remove fan partition mounting bracket (2 screws located on the left side of control compartment on the fan partition panel). Slide bracket forward, bottom first, to remove. (See Fig. 18.)

rain

6. Remove wires connected to gas valve. Mark each wire.

7. Remove the mounting screw that attaches the burner rack to the unit base (See Fig. 18).

8. Partially slide the burner rack out of the unit (see Fig. 18 and 21). Remove ignitor and sensor wires at the burner assembly. Remove wires to rollout switch.

9. Slide the burner rack out of the unit (See Fig. 18 and 21).

10. To reinstall, reverse the procedure outlined above.

11. Check all connections for leaks.

WARNING

FIRE, EXPLOSION HAZARD

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

Outdoor Coil, Indoor Coil, and Condensate Drain Pan

Inspect the condenser coil, evaporator coil, and condensate drain pan at least once each year.

The coils are easily cleaned when dry; therefore, inspect and clean the coils either before or after each cooling season. Remove all obstructions, including weeds and shrubs, that interfere with the airflow through the condenser coil.

Straighten bent fins with a fin comb. If coated with dirt or lint, clean the coils with a vacuum cleaner, using the soft brush attachment. Be careful not to bend the fins. If coated with oil or grease, clean the coils with a mild detergent and water solution. Rinse coils with clear water, using a garden hose. Be careful not to splash water on motors, insulation, wiring, or air filter(s). For best results, spray condenser coil fins from inside to outside the unit. On units with an outer and inner condenser coil, be sure to clean between the coils. Be sure to flush all dirt and debris from the unit base.

Inspect the drain pan and condensate drain line when inspecting the coils. Clean the drain pan and condensate drain by removing all foreign matter from the pan. Flush the pan and drain trough with clear water. Do not splash water on the insulation, motor, wiring, or air filter(s). If the drain trough is restricted, clear it with a “plumbers snake” or similar probe device.

Integrated Gas Unit Controller (IGC)

Auto Transformer fuses used on 460 volt units only. (Hidden)

Interface Fan Board (IFB)

Induced Draft Motor

Fan Partition Mounting Bracket

Flue Collector Box

Inducer Blower Housing

Burner Rack

Mounting Screw

Rollout Switch

Fig. 18 -- Blower Housing and Flue Collector Box

A09193

48VL--A

A07680

Fig. 21 -- Burner Rack Removed

Outdoor Fan

Control

Blower

Compressor Access Panel

Access Panel

48VL--A

Fig. 19 -- Unit Access Panels

Access Panel

A09211

BLOWER HOUSING

2 SETSCREWS (HIDDEN)

UNIT OPERATION HAZARD

Failure to follow this caution may result in damage to unit components.

Keep the condenser fan free from all obstructions to ensure proper cooling operation. Never place articles on top of the unit.

1. Remove 6 screws holding outdoor grille and motor to top

2. Turn motor/grille assembly upside down on top cover to

3. Inspect the fan blades for cracks or bends.

4. If fan needs to be removed, loosen setscrew and slide fan off

5. When replacing fan blade, position blade as shown in Fig.

6. Ensure that setscrew engages the flat area on the motor shaft

7. Replace grille.

cover.

expose fan blade.

motor shaft.

22.

when tightening.

CAUTION

Electrical Controls and Wiring

Inspect and check the electrical controls and wiring annually. Be sure to turn off the electrical power to the unit.

C99085

Fig. 20 -- Removal of Motor and Blower Wheel

Remove access panels (see Fig. 19) to locate all the electrical controls and wiring. Check all electrical connections for tightness. Tighten all screw connections. If any smoky or burned connections are noticed, disassemble the connection, clean all the parts, re--strip the wire end and reassemble the connection properly and securely.

After inspecting the electrical controls and wiring, replace all the panels. Start the unit, and observe at least one complete cooling cycle to ensure proper operation. If discrepancies are observed in operating cycle, or if a suspected malfunction has occurred, check each electrical component with the proper electrical instrumentation. Refer to the unit wiring label when making these checks.

MOTOR

FAN GRILLE

MOTOR SHAFT

A08505

MAX DISTANCE BETWEEN TOP OF FAN GRILLE AND BOTTOM OF FAN BLADE

SIZE

24 6.3 160 30 6.3 160 36 7.3 185 42 7.6 193 48 7.6 193 60 7.6 193

Fig. 22 -- 48VL--A Fan Blade Position

IN. MM

“A”

48VL--A

Refrigerant Circuit

Annually inspect all refrigerant tubing connections and the unit base for oil accumulations. Detecting oil generally indicates a refrigerant leak.

WARNING

EXPLOSION, SAFETY AND ENVIRONMENTAL HAZARD

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

System under pressure. Relieve pressure and recover all refrigerant before system repair or final unit disposal. Use all service ports and open all flow--control devices, including solenoid valves.

If oil is detected or if low cooling performance is suspected, leak--test all refrigerant tubing using an electronic leak--detector, halide torch, or liquid--soap solution. If a refrigerant leak is detected, refer to the Check for Refrigerant Leaks section.

If no refrigerant leaks are found and low cooling performance is suspected, refer to the Checking and Adjusting Refrigerant Charge section.

Gas Input

The gas input does not require checking unless improper heating performance is suspected. If a problem exists, refer to the Start--Up section.

Evaporator Airflow

The heating and/or cooling airflow does not require checking unless improper performance is suspected. If a problem exists, be sure that all supply-- and return--air grilles are open and free from obstructions, and that the air filter is clean. When necessary, refer to the Indoor Airflow and Airflow Adjustments section to check the system airflow.

Puron Items Metering Device (Thermostatic Expansion Valve

This metering device is a hard shutoff, balance port TXV. The TXV maintains a constant superheat at the evaporator exit resulting in higher overall system efficiency.

)

Pressure Switches

Pressure switches are protective devices wired into control circuit (low voltage). They shut off compressor if abnormally high or low pressures are present in the refrigeration circuit. These pressure switches are specifically designed to operate with Puron (R--410A) systems. R--22 pressure switches must not be used as replacements for the Puron (R--410A) system.

Loss of Charge Switch

This switch is located on the liquid line and protects against low suction pressures caused by such events as loss of charge, low airflow across indoor coil, dirty filters, etc. It opens on a pressure drop at about 20 psig. If system pressure is above this, switch should be closed. To check switch:

1. Turn off all power to unit.

2. Disconnect leads on switch.

3. Apply ohm meter leads across switch. You should have continuity on a good switch.

NOTE: Because these switches are attached to refrigeration system under pressure, it is not advisable to remove this device for troubleshooting unless you are reasonably certain that a problem exists. If switch must be removed, remove and recover all system charge so that pressure gauges read 0 psig. Never open system without breaking vacuum with dry nitrogen.

High--Pressure Switch

The high--pressure switch is located in the discharge line and protects against excessive condenser coil pressure. It opens at 650 psig.

High pressure may be caused by a dirty outdoor coil, failed fan motor, or outdoor air recirculation. To check switch:

1. Turn off all power to unit.

2. Disconnect leads on switch.

3. Apply ohm meter leads across switch. You should have continuity on a good switch.

Copeland Scroll Compressor (Puron Refrigerant)

The compressor used in this product is specifically designed to operate with Puron (R--410A) refrigerant and cannot be interchanged.

The compressor is an electrical (as well as mechanical) device. Exercise extreme caution when working near compressors. Power should be shut off, if possible, for most troubleshooting techniques. Refrigerants present additional safety hazards.

WARNING

FIRE/EXPLOSION HAZARD

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

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

The scroll compressor pumps refrigerant throughout the system by the interaction of a stationary and an orbiting scroll. The scroll compressor has no dynamic suction or discharge valves, and it is

48VL--A

more tolerant of stresses caused by debris, liquid slugging, and flooded starts. The compressor is equipped with a noise reducing shutdown device and an internal pressure relief port. The pressure relief port is a safety device, designed to protect against extreme high pressure. The relief port has an operating range between 550 (26.34 kPa) and 625 psig (29.93 kPa) differential pressure.

WARNING

EXPLOSION, ENVIRONMENTAL SAFETY HAZARD

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

This system uses Puron (R--410A) refrigerant which has higher operating pressures than R--22 and otherrefrigerants. No other refrigerant may be used in this system. Gauge set, hoses, and recovery system must be designed to handle Puron. If you are unsure, consult the equipment manufacturer.

Refrigerant System

This information covers the refrigerant system of the 48VL--A, including the compressor oil needed, servicing systems on roofs containing synthetic materials, the filter drier and refrigerant charging.

Compressor

The Copeland scroll compressor uses 3MAF POE oil. If additional oil is needed, use Uniqema RL32--3MAF. If this oil is not available, use Copeland Ultra 32 CC or Mobil Arctic EAL22 CC. This oil is extremely hygroscopic, meaning it absorbs water readily. POE oils can absorb 15 times as much water as other oils designed for HCFC and CFC refrigerants. Take all necessary precautions to avoid exposure of the oil to the atmosphere.

Oil

Servicing Systems on Roofs with Synthetic Materials

POE (polyolester) compressor lubricants are known to cause long term damage to some synthetic roofing materials.

Exposure, even if immediately cleaned up, may cause embrittlement (leading to cracking) to occur in one year or more. When performing any service that may risk exposure of compressor oil to the roof, take appropriate precautions to protect roofing. Procedures which risk oil leakage include, but are not limited to, compressor replacement, repairing refrigerant leaks, replacing refrigerant components such as filter drier, pressure switch, metering device, coil, accumulator, or reversing valve.

Synthetic Roof Precautionary Procedure

1. Cover extended roof working area with an impermeable polyethylene (plastic) drip cloth or tarp. Cover an approximate 10 X 10 ft. (3.1 m X 3.1 m) area.

2. Cover area in front of the unit service panel with a terry cloth shop towel to absorb lubricant spills and prevent run--offs, and protect drop cloth from tears caused by tools or components.

3. Place terry cloth shop towel inside unit immediately under component(s) to be serviced and prevent lubricant run--offs through the louvered openings in the unit base.

4. Perform required service.

5. Remove and dispose of any oil contaminated material per local codes.

Liquid Line Filter Drier

This filter drier is specifically designed to operate with Puron. Use only factory--authorized components. Filter drier must be replaced whenever the refrigerant system is opened. When removing a filter drier, use a tubing cutter to cut the drier from the system. Do not unsweat a filter drier from the system. Heat from unsweating will release moisture and contaminants from drier into system.

Puron (R--410A) Refrigerant Charging

Refer to unit information plate and charging chart. Some R--410A refrigerant cylinders contain a dip tube to allow liquid refrigerant to flow from cylinder in upright position. For cylinders equipped with a dip tube, charge Puron units with cylinder in upright position and a commercial metering device in manifold hose. Charge refrigerant into suction--line.

TROUBLESHOOTING

Use the Troubleshooting Guides (See Tables 13--15) if problems occur with these units.

START--UP CHECKLIST

Use Start--Up checklist to ensure proper start--up procedures are followed.

PURONR (R--410A) QUICK REFERENCE GUIDE

S Puron refrigerant operates at 50--70 percent higher pressures than R--22. Be sure that servicing equipment and replacement

components are designed to operate with Puron

S Puron refrigerant cylinders are rose colored. S Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400. S Puron systems should be charged with liquid refrigerant. Use a commercial type metering device in the manifold hose when

charging into suction line with compressor operating

S Manifold sets should be minimum 700 psig high side and 180 psig low side with 550 psig low--side retard. S Use hoses with minimum 700 psig service pressure rating. S Leak detectors should be designed to detect HFC refrigerant. S Puron, as with other HFCs, is only compatible with POE oils. S Vacuum pumps will not remove moisture from oil. S Do not use liquid--line filter driers with rated working pressures less than 600 psig. S Do not leave Puron suction line filter driers in line longer than 72 hrs. S Do not install a suction--line filter drier in liquid line. S POE oils absorb moisture rapidly. Do not expose oil to atmosphere. S POE oils may cause damage to certain plastics and roofing materials. S Wrap all filter driers and service valves with wet cloth when brazing. S A factory approved liquid--line filter drier is required on every unit. S Do NOT use an R--22 TXV. S Never open system to atmosphere while it is under a vacuum. S When system must be opened for service, recover refrigerant, evacuate then break vacuum with dry nitrogen and replace filter

driers. Evacuate to 500 microns prior to recharging.

S Do not vent Puron into the atmosphere. S Observe all warnings, cautions,andbold text. S All indoor coils must be installed with a hard shutoff Puron TXV metering device.

48VL--A

Table 13 – Troubleshooting Chart

SYMPTOM CAUSE REMEDY

Compressor and condenser fan will not start.

Compressor will not start but condenser fan runs

Three--phase scroll compressor makes excessive noise, and there may be a

low pressure differential.

Compressor cycles (other than normally sat-

48VL--A

isfying thermostat)

Compressor operates continuously

Excessive head pressure

Head pressure too low

Excessive suction pressure Refrigerant overcharged Recover excess refrigerant

Suction pressure too low

Power failure Call power company Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker Defective contactor, transformer, or high--pressure,

loss--of--charge or low--pressure switch Insufficient line voltage Determine cause and correct Incorrect or faulty wiring Check wiring diagram and rewire correctly

Thermostat setting too high

Faulty wiring or loose connections in compressor circuit

Compressor motor burned out, seized, or Determine cause internal overload open Replace compressor Defective run/start capacitor, overload, start relay Determine cause and replace

One leg of 3--phase power dead

Low input voltage Determine cause and correct

Scroll compressor is rotating in the wrong direction

Refrigerant overcharge or undercharge

Defective compressor Replace and determine cause Insufficient line voltage Determine cause and correct Blocked outdoor coil Determine cause and correct Defective run/start capacitor Determine cause and replace Faulty outdoor fan motor or capacitor Replace Restriction in refrigerant system Locate restriction and remove Dirty air filter Replace filter Unit undersized for load Decrease load or increase unit size Thermostat temperature set too low Reset thermostat Low refrigerant charge Locate leak, repair, and recharge

Air in system

Outdoor coil dirty or restricted Clean coil or remove restriction Dirty air filter Replace filter Dirty condenser coil Clean coil Refrigerant overcharged Recover excess refrigerant

Air in system

Condenser air restricted or air short--cycling Determine cause and correct Low refrigerant charge Check for leaks, repair, and recharge.

Restriction in liquid tube Remove restriction

Dirty air filter Replace filter Low refrigerant charge Check for leaks, repair and recharge Metering device or low side restricted Remove source of restriction

Insufficient evaporator airflow

Temperature too low in conditioned area Reset thermostat Outdoor ambient below 55°F(13°C) Install low--ambient kit Filter drier restricted Replace filter

Replace component

Lower thermostat temperature setting below room temperature

Check wiring and repair or replace

Replace fuse or reset circuit breaker Determine cause

Correct the direction of rotation by reversing the 3--phase power leads to the unit. Shut down unit

to allow pressures to equalize. Recover refrigerant, evacuate system, and re-

charge to capacities shown on rating plate

Recover refrigerant, evacuate system, and recharge

Increase air quantity Check filter–replace if necessary

Table 14 – Troubleshooting Guide–Heating

SYMPTOM CAUSE REMEDY

Burners will not ignite

Inadequate heating

Poor flame characteristics

Water in gas line Drain. Install drip leg. No power to furnace Check power supply fuses, wiring or circuit breaker.

No 24--v power supply to control circuit

Mis--wired or loose connections Check all wiring and wire nut connections

Misaligned spark electrodes

No gas at main burners

Dirty air filter Clean or replace filter as necessary Gas input to furnace too low Check gas pressure at manifold match with that on unit nameplate Unit undersized for application Replace with proper unit or add additional unit Restricted airflow Clean or replace filter. Remove any restriction.

Limit switch cycles main burners

Incomplete combustion results in: Aldehyde odors, carbon monoxide, sooting flame, floating flame

Check transformer. NOTE: Some transformers have internal over--current protection that requires a cool--down period to reset.

Check flame ignition and sense electrode positioning. Adjust as necessary.

1. Check gas line for air. Purge as necessary. NOTE: After purging gas line of air, wait at least 5 minutes for any gas to dissipate before attempting to light unit.

2. Check gas valve.

Check rotation of blower, temperature rise of unit. Adjust as necessary.

1. Tighten all screws around burner compartment

2. Cracked heat exchanger. Replace.

3. Unit over--fired. Reduce input (change orifices or adjust gas line or manifold pressure).

4. Check burner alignment.

5. Inspect heat exchanger for blockage. Clean as necessary.

Table 15 – Troubleshooting Guide–LED Status Codes

SYMPTOM CAUSE REMEDY

No Power or Hardware failure (LED OFF)

Limit switch faults (LED 2 flashes)

Flame sense fault (LED 3 flashes)

4 consecutive limit switch faults (LED 4 flashes)

Ignition lockout fault (LED 5 flashes)

Pressure Switch fault (LED 6 flashes)

Rollout switch fault (LED 7 flashes)

Internal control fault (LED 8 flashes)

Temporary 1 hr auto reset (LED 9 flashes)

*WARNING : If the IGC must be replaced, be sure to ground yourself to dissipate any electrical charge that my be present before handling new control board. The IGC is sensitive to static electricity an d my be damaged if the necessary precautions are not taken.

IMPORTANT: Refer to Table 14---Troubleshooting Guide ---Heating for additional troubleshooting analysi s . LEGEND

IGC—Integrated Gas Unit Controller LED—Light---Emitting Diode

Loss of power to control module (IGC)*.

High temperature limit switch is open.

The IGC* sensed flame that should not be present. Reset unit. If problem persists, replace control board.

Inadequate airflow to unit.

Unit unsuccessfully attempted ignition for 15 minutes.

Open pressure switch.

Rollout switch has opened.

Microprocessor has sensed an error in the software or hardware.

Electrical interference impeding IGC software

Check 5--amp fuse son IGC*, power to unit, 24--v circuit breaker, and transformer. Units without a 24--v circuit breaker have an internal overload in the 24--v transformer. If the overload trips, allow 10 minutes for automatic reset.

Check the operation of the indoor (evaporator) fan motor. Ensure that the supply--air temperature rise is in accordance with the range on the unit nameplate. Clean or replace filters.

Check the operation of the indoor (evaporator) fan motor and that supply--air temperature rise agrees with range on unit nameplate information.

Check ignitor and flame sensor electrode spacing, gaps, etc. Ensure that fame sense and ignition wires are properly terminated. Verify that unit is obtaining proper amount of gas.

Verify wiring connections to pressure switch and inducer motor. Verify pressure switch hose is tightly connected to both inducer housing and pressure switch. Verify inducer wheel is properly attached to inducer motor shaft. Verify inducer motor shaft is turning.

Rollout switch will automatically reset, but IGC* will continue to lockout unit. Check gas valve operation. Ensure that induced--draft blower wheel is properly secured to motor shaft. Inspect heat exchanger. Reset unit at unit disconnect.

If error code is not cleared by resetting unit power, replace the IGC*.

Reset 24--v. to control board or turn thermostat off, then on again. Fault will automatically reset itself in one (1) hour.

48VL--A

START--UP CHECKLIST

(Remove and Store in Job Files)

I. PRELIMINARY INFORMATION

MODEL NO.: SERIAL NO.: DATE: TECHNICIAN:

II. PRESTART--UP (Insert check mark in box as each item is completed)

( ) VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT ( ) REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS ( ) CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS ( ) CHECK GAS PIPING FOR LEAKS (WHERE APPLICABLE) ( ) CHECK THAT INDOOR (EVAPORATOR) AIR FILTER IS CLEAN AND IN PLACE ( ) VERIFY THAT UNIT INSTALLATION IS LEVEL ( ) CHECK FAN WHEEL, AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW TIGHTNESS

III. START--UP ELECTRICAL

48VL--A

SUPPLY VOLTAGE COMPRESSOR AMPS INDOOR (EVAPORATOR) FAN AMPS

TEMPERATURES

OUTDOOR (CONDENSER) AIR TEMPERATURE DB RETURN--AIR TEMPERATURE DB WB COOLING SUPPLY AIR DB WB GAS HEAT SUPPLY AIR

PRESSURES

GAS INLET PRESSURE IN. W.C. GAS MANIFOLD PRESSURE IN. W.C. REFRIGERANT SUCTION PSIG, SUCTION LINE TEMP* REFRIGERANT DISCHARGE PSIG, LIQUID TEMP{ ( ) VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS GAS HEAT TEMPERATURE RISE TEMPERATURE RISE (See Literature) RANGE MEASURED TEMPERATURE RISE

* Measur ed at suction inlet to compressor { Measured at liquid line leaving condenser.

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

Catalog No: 48VL --- 08SI

Replaces: 48VL---07SI

Carrier Performance 48VL-A Installation Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual