Carrier T R-410A User Manual

40RU

Packaged Air-Handling Units
60 Hz

®

with Puron

(R-410A) Refrigerant

Sizes 25, 28, 30

Installation, Start-Up and

Service Instructions

TABLE OF CONTENTS

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

PRE-INST ALLA TION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Moving and Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Rigging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–20

General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Uncrating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Unit Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Unit Isolation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Refrigerant and Chilled Water Piping Access . . . . . . 11

Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Chilled Water Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Fan Motors and Drives . . . . . . . . . . . . . . . . . . . . . . . . . 16

Power Supply and Wiring . . . . . . . . . . . . . . . . . . . . . . . 17

Connecting Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

START-UP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

SERVICE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21–34

Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Fan Motor Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . 21

Fan Shaft Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Centering Fan Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Fan Shaft Position Adjustment. . . . . . . . . . . . . . . . . . . 22

Individual Fan Wheel Adjustment . . . . . . . . . . . . . . . . 22

Fan Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Fan Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Fan Pulley Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Pulley and Drive Adjustment . . . . . . . . . . . . . . . . . . . . 23

Condensate Drains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Chilled Water Coil Freeze Protection . . . . . . . . . . . . 23

Coil Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Cleaning Cooling Coil. . . . . . . . . . . . . . . . . . . . . . . . . . 23

Cleaning Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Replacing Filters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . CL-1, CL-2

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical shock
or other conditions which may cause personal injury or
property damage. Consult a qualified installer, service agency,
or your distributor or branch for information or assistance. The
qualified installer or agency must use factory-authorized kits or
accessories when modifying this product. Refer to the
individual instructions package

Follow all safety codes. Wear safety glasses and work gloves.
Use quenching cloths for brazing operations and have a fire
extinguisher available. Read these instructions thoroughly and
follow all warnings or cautions attached to the unit. Consult
local building codes and appropriate national electrical codes
(in USA, ANSI/NFPA70, National Electrical Code (NEC); in
Canada, CSA C22.1) for special requirements.

It is important to recognize safety information. This is the
safety-alert symbol . When you see this symbol on the unit
and in instructions or manuals, be alert to the potential for
personal injury.

Understand the signal words DANGER, WARNING,
CAUTION, and NOTE. These words are used with the
safety-alert symbol. DANGER identifies the most serious
hazards which will result in severe personal injury or death.
WARNING signifies hazards which could result in personal
injury or death. CAUTION is used to identify unsafe practices,
which may result in minor personal injury or product and
property damage. NOTE is used to highlight suggestions
which will result in enhanced installation, reliability, or
operation.

ELECTRICAL SHOCK HAZARD

LEGEND

TXV — Thermostatic Expansion Valve

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

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

UNIT OPERA TION AND SAFETY HAZARD

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

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

PERSONAL INJURY AND ENVIRONMENTAL
HAZARD

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

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

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

CUT HAZARD

Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care

and wear appropriate protective clothing, safety glasses and
gloves when handling parts and servicing 40RU units.

4. This installation must conform with local building codes
and with the NEC (National Electrical Code) or ANSI
(American National Standards Institute)/NFPA (National
Fire Protection Association) latest revision. Refer to
provincial and local plumbing or wastewater codes and
other applicable local codes.

Moving and Storage — To transfer unit from truck to

storage site, use a fork truck. Do not stack units more than
2 high during storage. If unit is to be stored for more than
2 weeks before installation, choose a level, dry storage site free
from vibration. Do not remove plastic wrap or skid from unit
until final installation.

Rigging — All 40RU Series units can be rigged by using

the shipping skid. Units are shipped fully assembled. Do not
remove shipping skids or protective covering until unit is ready
for final placement; damage to bottom panels can result. Use
slings and spreader bars as applicable to lift unit.

INSTALLATION

General — Allow 2

clearance and airflow. For units equipped with an economizer,
refer to the accessory installation instructions for additional
clearance requirements. Be sure floor, wall, or ceiling can
support unit weight (T ables 1A – 1D). See Fig. 2A and Fig. 2B
for dimensions.

Uncrating — Move unit as near as possible to final loca-

tion before removing shipping skid.
Remove metal banding, top skid, and plastic wrap. Examine

unit for shipping damage. If shipping damage is evident, file
claim with transportation agency. Remove base skid just prior
to actual installation.

Check nameplate information against available power supply
and model number description in Fig. 3.

NOTE: Be sure to remove the styrofoam shipping pad from
the thermostatic expansion valve (TXV). Verify that it has
been removed. See Fig. 1.

1

/2 ft at front and side of unit for service

UNIT OPERA TION HAZARD

Failure to follow this caution could cause equipment
damage.

Ensure voltage listed on unit data plate agrees with
electrical supply provided for the unit.

PRE-INSTALLATION

1. The power supply (v, ph, and Hz) must correspond to that
specified on unit rating plate.

2. The electrical supply provided by the utility must be suf­ficient to handle load imposed by this unit.

3. Refer to Installation, General section (page 2) and
Fig. 2A and Fig. 2B for locations of electrical inlets, con­densate drain, duct connections, and required clearances
before setting unit in place.

Fig. 1 — Foam Block Location

Accessories — Refer to instructions shipped with each

accessory for specific information.

2

LEGEND

TXV — Thermostatic Expansion Valve
NOTES:

1. Dimensions in [ ] are in millimeters.

2. Direction of airflow.

3. Recommended clearance:

• Rear: 3 in. (76 mm)

• Front: 2 ft, 6 in. (762 mm)

• Right Side: 2 ft, 6 in. (762 mm)

• Left Side: 2 ft, 6 in. (762 mm)

• Local codes or jurisdiction may
prevail.

4. Liquid piping not supplied by Carrier.

5. Duct flange is factory-supplied and field-

installed.

UNIT

UNIT WEIGHT

lb (kg)

40RUA*25 730 (331)
40RUS*25 683 (310)

Fig. 2A — Dimensions – Size 25

3

UNIT

UNIT WEIGHT

lb (kg)

40RUA*28 1050 (477)
40RUA*30 1062 (482)
40RUS*28 1035 (469)
40RUS*30 1042 (473)

LEGEND

TXV — Thermostatic Expansion Valve
NOTES:

1. Dimensions in [ ] are in millimeters.

2. Direction of airflow.

3. Recommended clearance:

• Rear: 3 in. (76 mm)

• Front: 2 ft, 6 in. (762 mm)

• Right Side: 2 ft, 6 in. (762 mm)

• Left Side: 2 ft, 6 in. (762 mm)

• Local codes or jurisdiction may
prevail.

4. Liquid piping not supplied by Carrier.

5. Duct flange is factory-supplied and field-

installed.

6. 40RUS may require alternate or additional

field favricated poping access holes

Fig. 2B — Dimensions – Sizes 28 and 30

4

Table 1A — 40RUA Physical Data, English — Cooling Units

UNIT 40RUA* 25 28 30
NOMINAL CAPACITY (Tons) 20 25 30
OPERATING WEIGHT (lb)

Base Unit with TXV 730 1050 1062
Plenum 225 325 325

FANS

Qty...Diam. (in.) 2...15 2...18 2...18
Nominal Airflow (cfm) 8,000 10,000 12,000
Airflow Range (cfm) 6,000 – 10,000 7,500 – 12,500 9,000 – 15,000
Nominal Motor Hp (Standard Motor)

208/230-3-60 and 460-3-60 5.0 7.5 10.0
575-3-60 5.0 7.5 10.0

Motor Speed (rpm)

208/230-3-60 and 460-3-60 1745 1745 1745
575-3-60 1745 1755 1755

REFRIGERANT R-410A

Operating charge (lb)
(approx per circuit)

DIRECT-EXPANSION COIL Enhanced Copper Tubes, Aluminum Sine-Wave Fins

Max Working Pressure (psig) 450
Face Area (sq ft) 19.88 24.86 29.83
No. of Splits 222
No. of Circuits per Split 18 20 24
Split Type...Percentage Face...50/50
Fins/in. 17 15 15

PIPING CONNECTIONS,

Quantity...Size (in.)

DX Coil — Suction (ODF) 2...1
DX Coil — Liquid Refrigerant (ODF) 2...5/
Steam Coil, In (MPT) 1...21/
Steam Coil, Out (MPT) 1...1/
Hot Water Coil, In (MPT) 1...2
Hot Water Coil, Out (MPT) 1...2
Condensate (PVC) 1...1

FILTERS Throwaway — Factory Supplied

Quantity...Size (in.)
Access Location Either Side

STEAM COIL

‡

Max Working Pressure (psig at 260°F)
Total Face Area (sq ft) 13.33 15.0 15.0
Rows...Fins/in. 1...10 1...10 1...10

HOT WATER COIL

Max Working Pressure (psig) 150
Total Face Area (sq ft) 13.33 15.0 15.0
Rows...Fins/in. 2...8.5 2...12.5 2...12.5
Water Volume

(gal)

3

) 1.85 1.90

(ft

LEGEND

DX — Direct Expansion
TXV — Thermostatic Expansion Valve

†

Units are shipped without refrigerant charge.

‡

Field installed accessory only.

†

‡

3.5 4.5 5.0

1

/

8

4...16 x 20 x 2

4...16 x 24 x 2

2...13/

8

8

2

2

1

/4 ODM/1 IDF

4...20 x 24 x 2

4...20 x 25 x 2

20

13.9

14.3

2...13/

8

5

Table 1B — 40RUA Physical Data, SI — Cooling Units

UNIT 40RUA* 252830
NOMINAL CAPACITY (kW) 70 87 105
OPERATING WEIGHT (kg)

Base Unit with TXV 331 477 482
Plenum 102 148 148

FANS

Qty...Diam. (mm) 2...381 2...457 2...457
Nominal Airflow (L/s) 3775 4119 5663
Airflow Range (L/s) 2831 – 4719 3539 – 5899 4247 – 7079
Nominal Motor kW (Standard Motor)

208/230-3-60 and 460-3-60 3.73 5.60 7.46
575-3-60 3.73 5.60 7.46

Motor Speed (r/s)

208/230-3-60 and 460-3-60 29.1 29.1 29.1
575-3-60 29.1 29.3 29.3

REFRIGERANT R-410A

Operating charge (kg)
(approx per circuit)

DIRECT-EXPANSION COIL Enhanced Copper Tubes, Aluminum Sine-Wave Fins

Max Working Pressure (kPag) 3102
Face Area (sq m) 1.85 2.30 2.77
No. of Splits 222
No. of Circuits per Split 18 20 24
Split Type...Percentage Face...50/50
Fins/m 670 591 591

PIPING CONNECTIONS,

Quantity...Size (in.)

DX Coil — Suction (ODF) 2...1
DX Coil — Liquid Refrigerant (ODF) 2...5/
Steam Coil, In (MPT) 1...21/
Steam Coil, Out (MPT) 1...1/
Hot Water Coil, In (MPT) 1...2
Hot Water Coil, Out (MPT) 1...2
Condensate (PVC) 1...1

FILTERS Throwaway — Factory Supplied

Quantity...Size (mm.)
Access Location Either Side

STEAM COIL

‡

Max Working Pressure (kPag at 126°C) 138
Total Face Area (sq m) 1.24 1.39 1.39
Rows...Fins/m 1...394 1...394 1...394

HOT WATER COIL

Max Working Pressure (kPag) 1034
Total Face Area (sq m) 1.24 1.39 1.39
Rows...Fins/m 2...335 2...335 2...335
Water Volume

(L) 52.6 54.1

3

) 0.052 0.054

(m

LEGEND

DX — Direct Expansion
TXV — Thermostatic Expansion Valve

†

Units are shipped without refrigerant charge.

‡

Field installed accessory only.

†

‡

1.59 2.04 2.27

1

/

8

4...406 x 508 x 51

4...406 x 610 x 51

2...13/

8

8

2

2

1

/4 ODM/1 IDF

4...508 x 610 x 51

4...508 x 635 x 51

2...13/

8

6

Table 1C — 40RUS Physical Data, English — Chilled Water Units

UNIT 40RUS* 252830
NOMINAL CAPACITY (Tons) 20 25 30
OPERATING WEIGHT (lb)

Base Unit 683 1035 1042
Plenum 225 325 325

FANS

Qty...Diam. (in.) 2...15 2...18 2...18
Nominal Airflow (cfm) 8,000 10,000 12,000
Airflow Range (cfm) 6,000 – 10,000 7,500 – 12,500 9,000 – 15,000
Nominal Motor Hp (Standard Motor)

208/230-3-60 and 460-3-60 5.0 7.5 10.0
575-3-60 5.0 7.5 10.0

Motor Speed (rpm)

208/230-3-60 and 460-3-60 1745 1745 1745
575-3-60 1745 1755 1755

CHILLED WATER COIL Enhanced Copper Tubes, Aluminum Sine-Wave Fins

Max Working Pressure (psig) 435
Face Area (sq ft) – Upper 11.0 12.4 15.5
Face Area (sq ft) – Lower 8.3 12.4 12.4
Rows...Fins/in. 3...15

PIPING CONNECTIONS,

Quantity...Size (in.)

3

Chilled Water — In 2...1
Chilled Water — Out 2...1
Steam Coil, In (MPT) 1...2
Steam Coil, Out (MPT) 1...11/
Hot Water Coil, In (MPT) 1...2
Hot Water Coil, Out (MPT) 1...2
Condensate (PVC) 1...1

FILTERS Throwaway — Factory Supplied

Quantity...Size (in.)
Access Location Either Side

STEAM COIL

‡

Max Working Pressure (psig at 260°F) 20
Total Face Area (sq ft) 13.33 15.0 15.0
Rows...Fins/in. 1...10 1...10 1...10

HOT WATER COIL

‡

Max Working Pressure (psig) 150
Total Face Area (sq ft) 13.33 15.0 15.0
Rows...Fins/in. 2...8.5 2...12.5 2...12.5
Water Volume

(gal) 13.9 14.3

3

) 1.1 1.90

(ft

LEGEND

‡

Field installed accessory only.

/8 ODM 2...21/8 ODM 2...21/8 ODM

3

/8 ODM 2...21/8 ODM 2...21/8 ODM

1

/

2
2

1

/4 ODM/1 IDF

4...16 x 20 x 2

4...16 x 24 x 2

4...20 x 24 x 2

4...20 x 25 x 2

7

Table 1D — 40RUS Physical Data, SI — Chilled Water Units

UNIT 40RUS* 252830
NOMINAL CAPACITY (kW) 70 87 105
OPERATING WEIGHT (kg)

Base Unit 310 469 473
Plenum 102 148 148

FANS

Qty...Diam. (mm) 2...381 2...457 2...457
Nominal Airflow (L/s) 3775 4719 5663
Airflow Range (L/s) 2831 – 4719 3539 – 5899 4247 – 7079
Nominal Motor kW (Standard Motor)

208/230-3-60 and 460-3-60 3.73 5.60 7.46
575-3-60 3.73 5.60 7.46

Motor Speed (r/s)

208/230-3-60 and 460-3-60 29.1 29.1 29.1
575-3-60 29.1 29.3 29.3

CHILLED WATER COIL Enhanced Copper Tubes, Aluminum Sine-Wave Fins

Max Working Pressure (kPag) 2999
Face Area (sq m) – Upper 1.02 1.15 1.44
Face Area (sq m) – Lower 0.77 1.15 1.15
Rows...Fins/m 3...591 3...591 3...591

PIPING CONNECTIONS,

Quantity...Size (in.)

3

Chilled Water — In 2...1
Chilled Water — Out 2...1
Steam Coil, In (MPT) 1...2
Steam Coil, Out (MPT) 1...11/
Hot Water Coil, In (MPT) 1...2
Hot Water Coil, Out (MPT) 1...2
Condensate (PVC) 1...1

FILTERS Throwaway — Factory Supplied

Quantity...Size (mm.)
Access Location Either Side

STEAM COIL

‡

Max Working Pressure (kPag at 125°C) 138
Total Face Area (sq m) 1.24 1.39 1.39
Rows...Fins/m 1...394 1...394 1...394

HOT WATER COIL

‡

Max Working Pressure (kPag) 1034
Total Face Area (sq m) 1.24 1.39 1.39
Rows...Fins/m 2...335 2..493 2...493
Water Volume

(L) 52.6 54.1

3

) 0.052 0.054

(m

LEGEND

‡

Field installed accessory only.

/8 ODM 2...21/8 ODM 2...21/8 ODM

3

/8 ODM 2...21/8 ODM 2...21/8 ODM

1

/

2
2

1

/4 ODM/1 IDF

4...406 x 508 x 51

4...406 x 610 x 51

4...508 x 610 x 51

4...508 x 635 x 51

8

Fig. 3 — Model Number Nomenclature

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

4 0 R U A A 2 5 A 1 A 6 – 0 A 0 A 0

_____________ ____

Model Type Brand / Packaging

40RU = Carrier Fan Coil
Puronr R---410A Refrigerant

0=Standard

Typ e of C oil

Not Used

A=StandardDXCoil

A=PlaceHolder

S = Chilled Water Coil

Refrigerant Options

Service Options

C = Hot Water Coil

A=None
B = Steam Coil

0 = Non-Painted Cabinet
1=PaintedCabinet

Nominal Tonnage

25 = 20 Tons
28 = 25 Tons

Not Used

30 = 30 Tons

A=PlaceHolder

Not Used

0=PlaceHolder

Not Used

A=PlaceHolder

Design Rev

--- = Catalog Model Number

Indoor Fan Options

1 = Fan Drive and Motor - Low / Motor Efficiency - Standard

Voltage

2 = Fan Drive and Motor - Med / Motor Efficiency - Standard

1 = 575/3/60

3 = Fan Drive and Motor - High / Motor Efficiency - Standard

4 = Fan Drive and Motor - Low / Motor Efficiency - Premium

5 = Fan Drive and Motor - Med / Motor Efficiency - Premium

5 = 208/ 230/3/60
6 = 460/3/60

6 = Fan Drive and Motor - High / Motor Efficiency - Premium

Coil Options

A=Al/Cu

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POSITION NUMBER
TYPICAL

Year of manufacture (”08” = 2008)3−4

LEGEND

Accessory Line
Alternate Air Intake and Discharge

Air Intake and Discharge

Note:

Maintain recommended clearances
per Figs. 2A–2B

Unit Positioning — The unit can be mounted on the

floor for vertical application with return air entering the face of
the unit and supply air discharging vertically through the top of
the unit. The unit can also be applied in a horizontal
arrangement with return air entering horizontally and the
supply air discharging horizontally. When applying the unit in
a horizontal arrangement, ensure the condensate drain pan is
located at the bottom center of the unit for adequate condensate
disposal. See Fig. 5 for condensate connections for each unit
position.

T ypical positioning and alternate return air locations are shown
in Fig. 5. Alternate return air locations can be used by moving
the unit panel from the alternate return air location to the
standard return air location. Refer to overhead suspension
accessory drawing (Fig. 6) for preferred suspension technique.
The unit needs support underneath to prevent sagging.

IMPORTANT: Do NOT attempt to install unit with return
air entering top panel of unit. Condensate will not drain
from unit.

Fig. 4 — Serial Number Nomenclature

9

Fig. 5 — Typical Unit Positioning

OVERHEAD SUSPENSION ACCESSORY

UNIT SIZE 25

UNIT SIZES 28, 30

NOTE: Dimensions in [ ] are millimeters

Fig. 6 — Preferred Suspension Technique

10

Unit Isolation — Where extremely quiet operation is

UNIT

USE HOLE
NUMBERS

FIELD-FABRICATED HOLE DIAMETERS

in. (mm)

FIELD-FABRICATED HOLE POSITION

DIMENSIONS, in. (mm)

No. 5No. 6No. 7No.8ABCD

40RUA*25, 28, 30 1, 2, 3, 4————————

40RUS*25 4, 5, 6, 7 1

3

/4 (44.5) 13/4 (44.5) 13/4 (44.5) — 3.0 (76.2) 6.0 (152.5) 10.5 (266.7)

40RUS*28, 30 5, 6, 7, 8 2

1

/2 (63.5) 21/2 (63.5) 21/2 (63.5) 21/2 (63.5) 6.0 (152.5) 9.625 244.5) 13.38 (339.9) 17.0 (431.8)

essential, install isolators between floor and base of unit, or
between ceiling and top section of unit.

Be sure that unit is level and adequately supported. Use
channels at front and sides of unit for reference points when
leveling.

Refrigerant and Chilled Water Piping
Access —

knockouts for refrigerant and chilled water piping. These
knockouts are located on both sides of the unit for installation
flexibility. The standard knockouts provide sufficient access to
the unit’s coils for all 40RUA*25, 28, and 30 units. RUS*25,
28, and 30 units require additional holes which must be field­fabracated to accomodiate the piping. See Fig. 7 for the
positions and dimensions of the additional access holes
required for the RUS units. Recommended access hole use is
also listed for all units. Note that Fig. 7 shows the access holes
on the control-box side of the unit; this is the side of the unit
with the coil headers, so it is used most often for piping access.

IMPORTANT : Do not bury refrigerant piping underground.

The 40RU Series units come with standard

Refrigerant Piping — See Tables 1A–1D for refrigerant

pipe connection sizes. For ease in brazing, it is recommended
that all internal solder joints be made before unit is placed in
final position.

The 40RU direct-expansion units have internal
factory-installed thermostatic expansion valves (TXVs),
distributors, and nozzles for use with R-410A. See Table 2
for part numbers. Knockouts are provided in the unit corner
posts for 40RU refrigerant piping. See Fig. 7, which also
lists recommended knockouts and access holes to use for
each 40RU unit size. Recommended fittings are listed in
Table 3.

The sensor bulb capillary tubes must be routed from the TXVs
inside the unit through one of the piping access holes. Clamp
the TXV sensor bulb on a vertical portion of the suction line,
outside the unit. See Fig. 8.

NOTE: Be sure to remove the styrofoam shipping pad from
the TXV. Verify that it has been removed. See Fig. 1.

IMPORTANT: Never attach the sensor to the suction
manifold. Do NOT mount the sensor on a trapped portion
of the suction line.

The 40RU Series evaporator coils have a face-split design.
Ensure that lower circuit of coil is first on/last off when
connected to the condensing unit and/or system controls. See
Fig. 9.

External TXV equalizer connections are provided and
factory-brazed into the coil suction manifolds.

If suction line must be horizontal, clamp bulb to suction line at
least 45 degrees above bottom, at approximately the 4 o’clock
or 8 o’clock position. See Fig.10.

8
7
6
5

4

3
2

1

Fig. 7 — Refrigerant and Chilled Water Piping Access Holes

11

B

A

D

C

LEGEND:

TXV – Thermostatic Expansion Valve

NOTE: Component location arrangemet shown for field installatio n of

sight glasses, solenoid valves, filter driers, and TXV sensin g bulbs.
The TXVs and equilizer lines are factory installed.

UPPER

– Not required when mated to units 38AP_025 - 060

*

FIRST ON/LAST OFF = B

VERT ICAL INSTALL ATION

FIRST ON/LAST OFF = A

HORIZONT AL INS TAL LATION

LEGEND
TXV — Thermostatic Expansion Valve
NOTE: The 8 o’clock position is sho w n above.

SPLIT

AIRFLOW

LOWER
SPLIT

TXV
SENSING
BULB

15 DIAMS

MIN

TXV
SENSING
BULB

10

DIAMS

8 DIAMS

MIN

EQUALIZER LINE

TXV

EQUALIZER

LINE

FILTER

DRIER

SOLENOID*

VALV E

SIGHT

GLASS

8 DIAMS

MIN

TXV

INDOOR
COIL

AIRFLOW

15 DIAMS

MIN

10

DIAMS

Fig. 8 — Face-Split Coil Suction and Liquid Line Piping (Typical)

Fig. 9 — Typical Evaporator Coil Connections (40RU)

Fig. 10 — TXV Sensing Bulb Location

12

Table 2 — Factory-Installed Nozzle and Distributor Data

UNIT

COIL TYPE

STD

40RU*25 4 Row 2...BBIZE-8-GA
40RU*28 4 Row 2...BBIZE-15-GA
40RU*30 4 Row 2...BBIZE-15-GA

†

Feeder tube size is 1/4 in. (6.35 mm).

NOTE: Hot gas bypass applications require field-supplied auxiliary side connector.

TXV

Qty...Part No.

DISTRIBUTOR

Qty...Part No.

2...1135

2...1126

2...1126

Table 3 — Fitting Requirements

UNIT

40RUA25

40RUS25

ACCESS

HOLE NO.

‡

1 Suction Lower

2 Liquid Lower

3 Liquid Upper

4 Suction Upper

4 Supply Lower

5 Return Lower

6 Return Upper

7 Supply Upper

CONNECTION

TYPE

FEEDER TUBES

PER DISTRIBUTOR

CIRCUIT

Qty...S iz e (in.)

18...3/

16

3

20...

/

16

3

/

24...

16

1

1

/8 Street Elbow

1

/8 Nipple, 75/8 L

1

1

/8 Long Radius Elbow

1

5

/8 Street Elbow

5

/8 Nipple, 61/2 L

5

/8 Long Radius Elbow

5

/8 Street Elbow

5

/8 Nipple, 91/2 L

5

/8 Long Radius Elbow

1

/8 Nipple, 55/8 L

1

1

/8 Long Radius Elbow

1

1

/8 Nipple, 11 L

1

1

/8 Long Radius Elbow

1

3

1

/8 Long Radius Elbow

3

/8 Nipple, 33/4 L

1

3

/8 Long Radius Elbow

1

3

/8 Long Radius Elbow

1

3

/8 Nipple, 33/8 L

1

3

/8 Long Radius Elbow

1

3

/8 Long Radius Elbow

1

3

/8 Nipple, 7 L

1

3

1

/8 Long Radius Elbow

3

/8 Long Radius Elbow

1

3

/8 Nipple, 113/4 L

1

3

1

/8 Long Radius Elbow

†

NOZZLE

Qty...Part No.

2...G6

2...C15

2...C17

FITTINGS REQUIRED

(in.)

†

13

Table 3 — Fitting Requirement (cont)

UNIT

ACCESS

HOLE NO.

‡

1 Suction Lower

2 Liquid Lower

40RUA28

3 Liquid Upper

4 Suction Upper

5 Supply Lower

6 Return Lower

40RUS*28, 30

7 Return Upper

8 Supply Upper

1 Suction Lower

2 Liquid Lower

40RUA*30

3 Liquid Upper

4 Suction Upper

‡

See Fig. 7 for access hole location by number.

† Fittings are listed in order from header or tee stub connection out to access hole in corner support post.

CONNECTION

TYPE

CIRCUIT

FITTINGS REQUIRED

3

1

/8 Street Elbow

3

/8 Nipple, 11 L

1

3

/8 Long Radius Elbow

1

5

/8 Street Elbow

5

/8 Nipple, 11/2 L

5

/8 Long Radius Elbow

5

/8 Street Elbow

5

/8 Nipple, 191/2 L

5

/8 Long Radius Elbow

3

/8 Nipple, 43/16 L

1

3

/8 Long Radius Elbow

1

3

/8 Nipple, 231/4 L

1

3

/8 Long Radius Elbow

1

1

2

/8 Long Radius Elbow

1

/8 Nipple, 31/2 L

2

1

/8 Long Radius Elbow

2

1

/8 Long Radius Elbow

2

1

/8 Nipple, 3 L

2

1

/8 Long Radius Elbow

2

1

/8 Long Radius Elbow

2

1

/8 Nipple, 67/8 L

2

1

/8 Long Radius Elbow

2

1

/8 Long Radius Elbow

2

1

/8 Nipple, 117/8 L

2

1

/8 Long Radius Elbow

2

3

1

/8 Street Elbow

3

/8 Nipple, 3 L

1

3

/8 Long Radius Elbow

1

5

/8 Street Elbow

5

/8 Nipple, 73/4 L

5

/8 Long Radius Elbow

5

/8 Street Elbow

5

/8 Nipple, 181/2 L

5

/8 Long Radius Elbow

3

/8 Nipple, 43/16 L

1

3

1

/8 Long Radius Elbow

3

/8 Nipple, 191/4 L

1

3

/8 Long Radius Elbow

1

(in.)

†

14

Chillled Water Piping — See Tables 1C and 1D for

chilled water connecton sizes. For ease in bazing, it it recom­mended that all internal solder joints be made before unit is
placed in final position.

Knockouts are provided in the unit corner posts for 40RUS re­frigerant piping. Additional field-fabricated access holes are re­quired for 40RUS chilled water piping. See Fig. 7, which lists
recommended knockouts and access holes to use for each
40RUS unit size.

To size, design, and install chilled water piping, consult the
Carrier System Design manual. See Fig. 11 for an example of a
typical installation. Recommended fittings are listed in T able 3.

To access 40RUS coil vents and drains, remove the unit side
panel over the coil header. Vent and drain plugs are on the top
and bottom of header, respectively. See the Service section for
information on preventing coil freeze-up during winter.

Fig. 11 — Typical 40RUS Chilled Water Piping

15

Condensate Drain — Install a trapped condensate drain

3” MIN.

[76]

NOTE: Dimensions in [ ] are in millimeters

line to unit connection as shown in Fig. 12. The unit drain con­nection is a PVC stub. See Fig. 13. Some areas may require an
adapter to connect to either galvanized steel or copper pipe.
For these applications, install a field-supplied threaded PVC
adapter.

Fig. 12 — Condensate Drains

NOTE: A trap must be installed in the condensate drain
line to ensure that the static pressure of fans is balanced
with the water column in the drain line and that condensate
can drain completely from pan. Without a trap, air can be
drawn up drain line until water level in condensate pan
becomes equal to static pressure created by fans, preventing
complete drainage. Conditions will worsen as filters
become dirty .

Install clean-out plugs in trap. Pitch drain line downward to an
open floor drain or sump. Provide service clearance around
drain line to permit removal of unit panels. Observe all local
sanitary codes.

Fig. 13 — Drain Pan Slope Adjustment

As shipped, the unit’s condensate drain pan is NOT sloped to­wards the drain connection. The pan slope must be changed to
pitch towards the side of the unit with the drain connection. See
Fig. 13. Loosen the 2 screws next to the drain outlet at both
ends of the unit, push drain pan down in the slots near the drain
connection, and up in the slots on the opposite end. Retighten
screws. The pan should have a pitch of at least

1

/4-in. over its

length toward the drain connection.

Fan Motors and Drives — Motor and drive packages

are factory installed in all units. The motor and drive packages
consist of the following items:

1 — fan motor
1 — adjustable motor pulley
1 — fan pulley
2 — matched fan belts (40RUA*25-30, 40RUS*25-30 units)
For instructions on changing fan rotation, changing drive

speeds and adjusting drives, see Pulley and Drive Adjustment
in the Service section.

16

Power Supply and Wiring — Check the unit data

COPPER

WIRE ONLY

ELECTRIC

DISCONNECT

SWITCH

ALUMINUM

WIRE

A

LEGEND

TXV —

Th ermostatic Expans ion Valve

23

22

21

1

3

1

2

1

1

1

0

5

°

C

6

00

VR

J

A

W

FAN
CONTACTOR

24V
TERMINAL
BLOCK

POWER
WIRING
KNOCKOUT

plate to ensure that available power supply matches electrical
characteristics of the unit. Provide a disconnect switch with an
integrated lock-out feature of size required to provide adequate
fan motor starting current. See Tables 4-6 for unit electrical
data.

FAN SCROLL

MOTOR

ND DRIVE

FAN
CONTACTOR
BOX

WIRE
ACCESS

ELECTRICAL SHOCK HAZARD

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

Do not use gas piping as an electrical ground. Unit cabinet
must have an uninterrupted, unbroken electrical ground to
minimize the possibility of personal injury if an electrical
fault should occur. This ground may consist of electrical
wire connected to unit ground lug in control compartment,
or conduit approved for electrical ground when installed in
accordance with NEC (National Electrical Code); ANSI/
NFPA 70, latest edition (in Canada, Canadian Electrical
Code CSA [Canadian Standards Association] C22.1), and
local electrical codes.

FIRE HAZARD

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

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

(See Fig. 14)

CONDENSATE
DRAIN
CONNECTION
(HORIZONTAL)

FILTER
ELEMENTS

FILTER
RETAINER
CLIP

FAN DRIVE
PULLEY

COIL

TXV BULB
ACCESS

REFRIGERANT
PIPING ACCESS

CONDENSATE
DRAIN
CONNNECTION
(VERTICAL)

Fig. 15 — Wiring and Service Access

(Side Panel Removed)

Fan motors are factory-installed on all units. Indoor-fan
contactors are located in the fan contactor box behind the side
access panel (see Fig. 15 and 16). Wire the thermostat to the
24-v control circuit terminal block located in the side of the fan
contactor control box, according to Fig. 17 or the unit label
diagram. If the air handler is part of a split system, complete the
wiring from the condensing unit to the thermostat shown in
Fig. 17.

Install disconnect switch and power wiring in accordance with
all applicable local codes. See Fig. 15-17 and the unit label
diagram. Connect power wiring with

Fig. 14 — Disconnect Switch and Unit

1

/4-in. ring terminal.

Fig. 16 — Fan Contactor Box and Terminal Block

(Cover Removed) (Typical)

17

Table 4 — Electrical Data, Standard Motors

LEGEND

†

Motors are designed for satisfactory operation within 10% of nominal
voltages shown. Voltages should not exceed the limits shown in the
Voltage Limits column.

NOTES:

1. Minimum circuit amps (MCA) and MOCP values are calculated in accor­dance with NEC (National Electrical Code), Article 440.

2. Motor FLA values are established in accordance with UL (Underwriters’
Laboratories) Standard 1995.

3. Unbalanced 3-Phase Supply Voltage

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

voltage imbalance.

EXAMPLE: Supply voltage is 400-3-50.

AB = 393 v
BC = 403 v
AC = 396 v

Determine maximum deviation from average voltage

(AB) 397 – 393 = 4 v
(BC) 403 – 397 = 6 v
(AC) 397 – 396 = 1 v

Maximum deviation is 6 v.
Determine percent voltage imbalance.

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

FLA — Full Load Amps
MOCP

—

Maximum Overcurrent Protection

% Voltage Imbalance = 100 x

max voltage deviation from average voltage

average voltage

Average Voltage =

393 + 403 + 396

3

=

119 2

3

=

397

% Voltage Imbalance = 100 x

6

397

=1.5%

IMPORTANT: If the supply voltage phase imbalance is more than

2%, contact your local electric utility company immediately.

UNIT V-PH-Hz

208/230-3-60 187-253 5.0 (3.73) 14.6/12.8 18.3/16.0 30/25

40RUA*25
40RUS*25

208/230-3-60 187-253 7.5 (5.59) 21.4/19.4 26.9/24.3 45/40

40RUA*28
40RUS*28

208/230-3-60 187-253 10.0 (7.46) 28.2/26.8 35.3/33.5 60/60

40RUA*30
40RUS*30

See Legend and Notes below.

UNIT V-PH-Hz

208/230-3-60 187-253 7.5 (5.59) 21.4/19.4 26.9/24.3 45/40

40RUA*25
40RUS*25

40RUA*28
40RUA*30
40RUS*28

208/230-3-60 187-253 10.0 (7.46) 28.2/26.8 35.3/33.5 60/60

40RUS*30

†

VOLTAGE

LIMITS

FAN MOTOR POWER SUPPLY

Hp (kW) FLA

Minimum

Circuit Amps

MOCP

460-3-60 414-506 5.0 (3.73) 6.4 8.0 15
575-3-60 518-632 5.0 (3.73) 5.1 6.4 15

460-3-60 414-506 7.5 (5.59) 9.7 12.1 20
575-3-60 518-632 7.5 (5.59) 7.8 9.8 15

460-3-60 414-506 10.0 (7.46) 13.4 16.8 30
575-3-60 518-632 10.0 (7.46) 10.3 12.9 20

Table 5 — Electrical Data, Alternate Mot or s

†

VOLTAGE

LIMITS

460-3-60 414-506 7.5 (5.59) 9.7 12.1 20
575-3-60 518-632 7.5 (5.59) 7.8 9.8 15

460-3-60 414-506 10.0 (7.46) 13.4 16.8 30
575-3-60 518-632 10.0 (7.46) 10.3 12.9 20

FAN MOTOR POWER SUPPLY

Hp (kW) FLA

Minimum

Circuit Amps

MOCP

See Legend and Notes below.

Legend and Notes For Tables 4 and 5

18

Fig. 17 — Unit Wiring

LEGEND

NOTE: Use copper conductors only.

EQUIP — Equipment
GND — Ground
HC — Heating Contactor
HTR — Electric Heater
IFC — Indoor-Fan Contactor
IFM — Indoor-Fan Motor
TB — Te rmin a l B l ock
T’STAT — Thermostat

Factory Wiring
Field Control Wiring

19

Table 6 — Fan Contactor Coil Data

UNIT

40RU**

25, 28, 30 24 10

VOLTAGE

(vac)

MAXIMUM

HOLDING

VA

Connecting Ductwork — Refer to the Carrier System

Design Manual for the recommended design and layout of
ductwork. Fig. 18 shows recommended duct connection to
units with 2 fans.

UNIT OPERA TION HAZARD

Failure to follow this caution could cause equipment
damage.

Do not operate unit without ductwork or discharge plenum
unless fan speed has been adjusted for external static
pressure of zero in. wg. Failure to do so may result in
motor overload.

DISCHARGE CONNECTIONS — Duct flanges are
factory-supplied; they are shipped inside the unit attached to
the hairpin end of the coil tube sheet for field installation.
Using the existing screws, install the duct flanges on the unit’s
fan deck. Each fan discharge requires 2 flanges; each flange
must be bent in the middle to conform to the discharge
opening. See Fig. 19. After flanges are installed, connect them
to the supply duct using a canvas connection to prevent
vibration. It is important that this connection be properly
fabricated to prevent high air friction losses and air noise.

RETURN CONNECTION — When usin g return-air
ductwork, route return-air duct to the unit’s return air inlet near
the filter rack, using a canvas connection to prevent
transmission of unit vibration. If the duct blocks off the unit’s
access panel, provide a slip joint in the ductwork to permit
removal for servicing.

OUTDOOR-AIR INLET CONNECTION — Connect outdoor­air inlet to field-installed accessory economizer. Refer to
Economizer Installation Instructions.

Return-Air Filters — Type and size of filters are shown

in Tables 1A – 1D and are factory-supplied and factory­installed. In all units with 2 fans, a filter replacement tool
(hook) is shipped inside the unit for field use when replacing
filters. See the Service section for instructions on filter element
replacement.

Fig. 18 — Typical Fan Discharge Connections for Multiple Fan Units

20

Fig. 19 — Duct Flange Installation

START-UP

Before starting unit, check the following and correct as
necessary:

• Is unit solidly supported?

• Is fan adjusted for speed and pulley alignment?

• Are pulleys, motor, and bearings securely mounted?

• Are there any loose parts that will rattle or vibrate?

• Is condensate drain pan pitched for correct drainage?

• Are coil baffle plates tight against coil to prevent air
bypass?

• Are all panels securely fastened?

• Are all electrical connections correct and tight?

Also refer to condensing unit instructions before starting a split
system. A split system start-up checklist is provided at the end
of these instructions.

SERVICE

Inspection and maintenance should be performed at regular in­tervals and should include the following:

• Complete cleaning of cabinet, fan wheel, cooling coil,
condensate pan and drain, heating coils, and return-air
grille (if present).

• Inspection of panels and sealing of unit against air
leakage.

• Adjustment of fan motor, belt, bearings, and wheels.

• Cleaning or replacement of filters.

• Testing for cooling/heating system leaks.

• Checking of all electrical connections.

Most unit service can be performed by removing one or both of
the unit’s side panels. Coil cleaning or removal or insulation
cleaning may require removal of a rear, top, or bottom panel,
depending on the unit’s orientation. When service is
completed, replace unit panels.

Panels — Panels are fastened to unit frame with sheet metal

screws. Fan and coil compartment must be sealed tightly after
service to prevent air from bypassing the cooling coil.

Fan Motor Lubrication — Fan motor supplied with

unit is permanently lubricated and requires no further
lubrication.

Fan Shaft Bearings — Size 25-30 units have pillow-

block bearings (Fig. 20) that must be lubricated with suitable
bearing grease approximately every 3 months. See Table 7 for
suitable lubricants.

Table 7 — Lubricant Data

MANUFACTURER LUBRICANT

Mobil Mobilplex EP No. 2
Sunoco Prestige 42
Texaco Multifak 2
Texaco Regal AFB-2*

*Preferred lubricant, contains rust and oxidation inhibitors.

ELECTRICAL SHOCK HAZARD

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

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

Fig. 20 — Fan Shaft, Bearings, and Fan Wheel (Typical)

21

Centering Fan Wheel — If fan and fan shaft assembly

are not properly centered, blades may scrape against the blower
side scroll plate or may create an objectionable whistling noise.
It may be necessary to adjust individual fan wheels or move en­tire fan shaft. See the following two sections.

Fan Shaft Position Adjustment — Loosen set-

screw or locking collar of each fan shaft bearing. Slide shaft
into correct position and replace locking collar (Fig. 21). To re­place locking collar, push collar up against inner face of bear­ing. Turn collar in direction of fan rotation until tight, and tight­en setscrew. Tightening locking collar in direction of fan rota­tion results in further tightening of collar should setscrew work
itself loose.

Individual Fan Wheel Adjustment — Loosen the

2 locking bolts holding fan wheel hub to shaft. See Fig. 20.
Position fan wheel in center of the fan housing and tighten
locking bolts. Clearance between wheel and housing should be
the same on both sides.

Fan Belts — Motor mounting plate and motor support

angles are slotted to permit both vertical and horizontal
adjustment. Adjust belt(s) for correct deflection by loosening
motor plate mounting bolts, moving motor/plate assembly
forward or back, and retightening bolts. Press down on belt
with one finger midway between fan and motor pulleys to
check deflection. The correct deflection is
Fig. 22.

If complete belt replacement is required during servicing,
loosen the motor plate mounting bolts (Fig. 22), move motor/
plate assembly towards fan pulley, and pull belt(s) off pulleys.
Reverse the procedure with new bolts and readjust deflection.

1

/8-in. (3.2 mm). See

Fan Rotation — Correct fan rotation with respect to fan

outlet is shown in Fig. 23.
To reverse the direction of rotation of a 3-phase fan motor,

reverse any 2 of the power leads. Refer to the connection
diagram on the inside of motor terminal box cover for proper
reversing procedure of single-phase motor.

Fig. 21 — Fan Shaft Bearing

Fig. 22 — Fan Motor Mounting

22

Fig. 23 — Fan Rotation

Fan Pulley Alignment — Align as follows:

1. Loosen setscrews on pulleys.

2. Align pulleys visually and tighten setscrews on fan pulley
to lock it in place.

3. Use the methods shown in Fig. 24 to check proper pulley
alignment.

4. If pulleys are not in correct alignment, loosen the motor
holddown bolts and slide the motor axially until the
pulleys are aligned.

5. Tighten motor holddown bolts.

Pulley and Drive Adjustment — To obtain desired

fan speed, refer to the fan motor and drive data in Tables
8A-11D and adjust fan motor pulley as follows:

1. Remove belt from fan motor pulley after loosening motor
from motor base.

2. Loosen setscrew in moveable flange of pulley. Screw
moveable flange toward fixed flange to increase the fan
speed and away from fixed flange to reduce speed.
Before tightening setscrew, make certain that setscrew is
over nearest flat surface of pulley hub (Fig. 24).

UNIT OPERA TION HAZARD

Failure to follow this caution could cause equipment
damage.

Increasing fan speed produces a greater load on motor. Do
not exceed rated capacity of motor.

Condensate Drains — Keep condensate drains free of

dirt and foreign matter.

Return-Air Filters — Refer to Replacing Filters section

for filter accessibility and removal. Replace with clean filters of
the sizes listed in Tables 1A-1D.

Chilled Water Coil Freeze Protection — Shut off

water supply to unit. Remove side panel of unit and remove
vent and drain plugs in top and bottom of coil header. Drain
coil and blow out remaining water. Reinstall plugs and side
panel.

Fig. 24 — Fan Pulley Adjustments

Alternative freeze protection methods follow:

• Circulate hot water within the water coil’s supply main
or supplementary space heating.

• Close off supply lines to unit and open a union or field­supplied drain valve in the return line.

IMPORTANT: Draining from return line will not com­pletely drain water from coils.

• After draining as much water as possible from coils, add
sufficient antifreeze to prevent residual water in the coil
from freezing.

• Add a sufficient quantity of non-corrosive antifreeze to
the entire system to prevent all water within the system
from freezing.

Coil Removal — Remove unit panels and corner posts as

required. Disconnect coil connections and remove fastening
screws. Remove coil through end or side sections of unit.

Cleaning Cooling Coil — Remove return-air filters.

Remove any heavy dirt that may have accumulated on under­side of coil. Coil can be cleaned more easily with a stiff brush,
vacuum cleaner, or compressed air when coil is dry. If coil is
wet or if water is to be used for cleaning, guard against splash­ing water on electrical components or damaging surrounding
area. Clean coil baffles as applicable and check for tight fit to
be sure air does not bypass coil.

Cleaning Insulation — The insulation contains an im-

mobilized antimicrobial agent that helps prevent the growth of
bacteria and fungi. Clean the inner surface of the insulation
according to the separate maintenance instructions shipped
with the unit.

23

Replacing Filters — Filters can be removed and in-

FILTER
RETAINE
CLIP

SLIDE

stalled from either side of the unit. Install new filters in units
that have one fan as follows:

1. Remove the side access panel (retain screws).

2. Remove the filter retainer clip (see Fig. 25).

3. Remove old filters by lifting and tilting them out of the
filter track. See Fig. 15 and 26. Use the factory-supplied
filter hook to slide filters within reach for removal. The
filter hook is shipped inside the unit in the filter track

4. Reverse the procedure to install new filters.

UNIT OPERA TION HAZARD

Failure to follow this caution could cause equipment
damage.
Do not operate unit without air filters.

Fig. 26 — Filter Removal/Replacement

Fig. 25 — Remove Filter Retainer Clip

24

Table 8A — Fan Motor Data, Standard Motor — English

UNIT

40RUA*25
40RUS*25

40RUA*28
40RUS*28

40RUA*30
40RUS*30

208/230-3-60 and 460-3-60

Speed (rpm) 1745 1745 1745
Hp 5.0 7.5 10.0
Frame (NEMA) S184T S213T S215T
Shaft Dia (in.) 1

1

/

8

13/

8

575-3-60

Speed (rpm) 1745 1755 1755
Hp 5.0 7.5 10.0
Frame (NEMA) 184T S213T D215T
Shaft Dia (in.) 1

LEGEND
NEMA — National Electrical Manufacturers Association

1

/

8

13/

8

Table 8B — Fan Motor Data, Alternate Motor — English

UNIT

40RUA*25
40RUS*25

208/230-3-60 and 460-3-60

Speed (rpm) 1745 1745 1745
Hp 7.5 10.0 10.0
Frame (NEMA) S213T S215T S215T
Shaft Dia (in.) 1

3

/

8

575-3-60

Speed (rpm) 1755 1750 1750
Hp 7.5 10.0 10.0
Frame (NEMA) S213T D215T D215T
Shaft Dia (in.) 1

LEGEND
NEMA — National Electrical Manufacturers Association

3

/

8

40RUA*28
40RUS*28

13/

8

13/

8

40RUA*30
40RUS*30

13/

13/

13/

13/

8

8

8

8

25

Table 8C — Fan Motor Data, Standard Motor — SI

UNIT

208/230-3-60 and 460-3-60

Speed (r/s) 29.08 29.08 29.08
Shaft kW 3.73 5.60 7.46
Frame (NEMA) S184T S213T S215T
Shaft Dia (mm) 28.634.934.9

575-3-60

Speed (r/s) 29.08 29.25 29.25
Shaft kW 3.73 5.60 7.46
Frame (NEMA) 184T S213T S215T
Shaft Dia (mm) 28.634.934.9

LEGEND

NEMA — National Electrical Manufacturers Association

40RUA*25
40RUS*25

40RUA*28
40RUS*28

40RUA*30
40RUS*30

Table 8D — Fan Motor Data, Alternate Motor — SI

UNIT

208/230-3-60 and 460-3-60

Speed (r/s) 29.08 29.17 29.17
Shaft kW 5.60 7.46 7.46
Frame (NEMA) S213T S215T S215T
Shaft Dia (mm) 34.934.934.9

575-3-60

Speed (r/s) 29.25 29.17 29.17
Shaft kW 5.60 7.46 7.46
Frame (NEMA) S213T D215T D215T
Shaft Dia (mm) 34.934.934.9

LEGEND

NEMA — National Electrical Manufacturers Association

40RUA*25
40RUS*25

40RUA*28
40RUS*28

40RUA*30
40RUS*30

26

Table 9A — Standard Drive Data, 60 Hz — English

UNIT

40RUA*25
40RUS*25

40RUA*28
40RUS*28

40RUA*30
40RUS*30

MOTOR DRIVE

Motor Pulley Pitch Diameter (in.) 3.7-4.7 4.3-5.3 4.3-5.3
Pulley Factory Setting

Full Turns Open

3.0 3.0 3.0

FAN DRIVE

Pulley Pitch Dia (in.) 9.4 11.0 11.0
Pulley Bore (in.) 1
Belt No. — Section 2—B 2—B

Belt Pitch (in.) 41.8

7

/

16

115/

16

(2) 42.8
(2) 43.8

115/

†

2—B

(2) 42.8
(2) 43.8

FAN SPEEDS (rpm)

Factory Setting 771 752 752
Range 679-863 682-841 674-831
Max Allowable Speed (rpm) 1200 1100 1100
Change per

Moveable Motor Pulley
Flange

MAX FULL TURNS FROM
CLOSED POSITION

SHAFTS CENTER DISTANCE (in.)

†

Four belts shipped with unit. Use correct set of 2 belts sized according to the pully setting.

1

/2 Turn of

15.3 13.1 13.1

666

9.12-

10.99

6.67-

9.43

16

†

6.67-

9.43

Table 9B — Medium-Static Drive Data, 60 Hz — English

UNIT

40RUA*25
40RUS*25

MOTOR DRIVE

Motor Pulley Pitch Diameter (in.) 4.3-5.3 4.3-5.3 4.3-5.3
Pulley Factory Setting

Full Turns Open

3.0 3.0 3.0

FAN DRIVE

Pulley Pitch Dia (in.) 9.4 9.4 9.4
Pulley Bore (in.) 1

7

/

16

Belt No. — Section 1—B 2—B
Belt Pitch (in.) 41.8

FAN SPEEDS (rpm)

Factory Setting 881 881 881
Range 798-984 798-984 798-984
Max Allowable Speed (rpm) 1200 1100 1100
Change per

Moveable Motor Pulley
Flange

MAX FULL TURNS FROM
CLOSED POSITION

SHAFTS CENTER DISTANCE (in.)

†

Four belts shipped with unit. Use correct set of 2 belts sized according to the pully setting.

1

/2 Turn of

15.3 15.3 15.3

666

9.16-

10.99

40RUA*28
40RUS*28

115/

16

†

(2) 38.8
(2) 39.8

6.67-

9.43

40RUA*30
40RUS*30

115/

2—B

(2) 38.8
(2) 39.8

6.67-

9.43

16

†

27

Table 9C — High-Static Drive Data, 60 Hz — English

UNIT

40RUA*25
40RUS*25

40RUA*28
40RUS*28

40RUA*30
40RUS*30

MOTOR DRIVE

Motor Pulley Pitch Diameter (in.) 4.3-5.3 4.3-5.3 4.3-5.3
Pulley Factory Setting

Full Turns Open

3.0 3.0 3.0

FAN DRIVE

Pulley Pitch Dia (in.) 7.4 8.6 8.6
Pulley Bore (in.) 1

7

/

16

115/

16

115/

Belt No. — Section 2—B 2—B 2—B
Belt Pitch (in.) 36.8 378 37.8

FAN SPEEDS (rpm)

Factory Setting 1118 1024 1024
Range

1014­1200

†

873-

1075

873-

1075

Max Allowable Speed (rpm) 1200 1100 1100
Change per

Moveable Motor Pulley
Flange

MAX FULL TURNS FROM
CLOSED POSITION

SHAFTS CENTER DISTANCE (in.)

†

It is possible to adjust drive so that fan speed exceeds maximum allowable. DO NOT exceed 1200 rpm.

1

/2 Turn of

19.416.716.7

666

8.16-

10.02

6.67-

9.43

6.67-

9.43

16

Table 9D — Standard Drive Data, 60 Hz — SI

UNIT

40RUA*25
40RUS*25

MOTOR DRIVE

Motor Pulley Pitch Diameter (mm)
Pulley Factory Setting

Full Turns Open

94.0-

119.4

3.0 3.0 3.0

FAN DRIVE

Pulley Pitch Dia (mm) 239 279 279
Pulley Bore (mm) 36.549.249.2
Belt No. — Section 2—B 2—B

Belt Pitch (mm) 1062

FAN SPEEDS (r/s)

Factory Setting 12.912.512.5
Range 11.3-14.4 11.4-14.0 11.2-13.9
Max Allowable Speed (r/s) 20.018.318.3
Change per

Moveable Motor Pulley
Flange

MAX FULL TURNS FROM
CLOSED POSITION

1

/2Turn of

0.255 0.218 0.218

666

SHAFTS CENTER DISTANCE (mm) 232-279 169-240 169-240

†

Four belts shipped with unit. Use correct set of 2 belts sized according to the pully setting.

40RUA*28
40RUS*28

109.2-

134.6

†

(2) 1987
(2) 1113

40RUA*30
40RUS*30

109.2-

134.6

†

2—B

(2) 1987
(2) 1113

28

Table 9E — Medium-Static Drive Data, 60 Hz — SI

UNIT

40RUA*25

40RUS*25

40RUA*28

40RUS*28

40RUA*30
40RUS830

MOTOR DRIVE

Motor Pulley Pitch Diameter (mm)
Pulley Factory Setting

Full Turns Open

109.2-

134.6

3.0 3.0 3.0

109.2-

134.6

109.2-

134.6

FAN DRIVE

Pulley Pitch Dia (mm) 239 239 239
Pulley Bore (mm) 36.5 49.2 49.2

(2) 986

(2) 1011

†

2—B

(2) 986

(2) 1011

Belt No. — Section 1—B 2—B
Belt Pitch (mm) 1062

FAN SPEEDS (r/s)

Factory Setting 14.7 14.7 14.7
Range 13.3-16.4 13.3-16.4 13.3-16.4
Max Allowable Speed (r/s) 20.0 18.3 18.3
Change per

Moveable Motor Pulley

1

/2 Turn of

0.255 0.255 0.255

Flange

MAX FULL TURNS FROM
CLOSED POSITION

666

SHAFTS CENTER DISTANCE (mm) 232-279 169-240 169-240

†

Four belts shipped with unit. Use correct set of 2 belts sized according to the pully se tting.

†

Table 9F — High-Static Drive Data, 60 Hz — SI

UNIT

40RUA*25
40RUS*25

MOTOR DRIVE

Motor Pulley Pitch Diameter (mm)
Pulley Factory Setting

Full Turns Open

109.2-

134.6

3.0 3.0 3.0

FAN DRIVE

Pulley Pitch Dia (mm) 188 203
Pulley Bore (mm) 36.5 49.2 49.2
Belt No. — Section 2—B 2—B 2—B
Belt Pitch (mm) 935 935 960

FAN SPEEDS (r/s)

Factory Setting 18.6 17.1 17.1
Range

16.9-

20.0

†

Max Allowable Speed (r/s) 20.0 18.3 18.3
Change per

Moveable Motor Pulley
Flange

MAX FULL TURNS FROM
CLOSED POSITION

1

/2 Turn of

0.323 0.278 0.278

666

SHAFTS CENTER DISTANCE (mm) 207-255 169-240 169-240

†

It is possible to adjust drive so that fan speed exceeds maximum allowable. DO NOT exceed 20 r/s.

40RUA*28
40RUS*28

109.2-

134.6

†

14.6-

17.9

40RUA*30

40RUS*30

109.2-

134.6

203

14.6-

17.9

29

Table 10A — 40RU Standard Fan Performance Data —

0.0-2.4 in. wg External Static Pressure — English

UNIT

40RUA*25
40RUS*25

40RUA*28
40RUS*28

40RUA*30
40RUS*30

See Legend and Notes on page 34.

UNIT

40RUA*25
40RUS*25

40RUA*28
40RUS*28

40RUA*30
40RUS*30

AIRFLOW

(Cfm)

6,000 532 1.25 569 1.39 639 1.69 711 2.06 781 2.48 846 2.93 905 3.60
7,000 608 1.93 641 2.09 702 2.42 763 2.08 824 3.23 885 3.71 943 4.23
8,000 686 2.83 716 3.01 770 3.38 823 3.77 876 4.21 930 4.70 983 5.24
9,000 764 3.97 791 4.18 841 4.59 888 5.02 935 5.47 982 5.96 1030 6.51

10,000 843 5.38 868 5.62 914 6.09 957 6.55 1000 7.02 1042 7.53 1084 8.08

7,500 456 1.29 490 1.47 556 1.85 621 2.25 678 2.64 729 3.06 778 3.60

8,750 521 1.98 551 2.18 608 2.61 664 3.07 720 3.53 770 3.99 816 4.45
10,000 587 2.88 614 3.11 664 3.59 714 4.09 763 4.62 812 5.15 857 5.68
11,250 653 4.03 678 4.29 724 4.82 768 5.37 812 5.95 856 6.54 899 7.14
12,500 720 5.46 743 5.75 785 6.33 825 6.93 865 7.55 904 8.20 944 8.86
15,000 829 8.84 850 9.19 888 9.88 924 10.57 958 11.27 991 11.99 1024 12.73

9,000 521 1.99 550 2.25 616 2.77 676 3.23 731 3.72 782 4.20 829 4.70
10,500 596 3.16 623 3.40 672 3.89 720 4.40 767 4.94 814 5.50 859 6.05
12,000 673 4.63 698 4.90 743 5.45 785 6.02 826 6.62 867 7.23 908 7.87
13,500 751 6.51 773 6.82 815 7.44 853 8.06 890 8.71 927 9.38 963 10.07
15,000 829 8.84 850 9.19 888 9.88 924 10.57 958 11.27 991 11.99 1024 12.73

AIRFLOW

(Cfm)

6,000 954 3.83 1005 4.27 1052 4.72 1098 5.22 1142 5.67 — —
7,000 990 4.74 1040 5.24 1090 5.80 1135 6.30 1176 6.84 — —
8,000 1028 5.79 1078 6.38 1130 7.00 1173 7.60 — — — —
9,000 1073 7.11 1120 7.72 1169 8.37 — — — — — —

10,000 1126 8.75 1166 9.37 — — — — — — — —

7,500 831 4.41 870 5.10 913 5.90 950 6.88 985 7.70 — —

8,750 859 4.97 901 5.59 944 6.42 980 7.20 1020 8.10 — —
10,000 900 6.20 939 6.74 976 7.33 1013 8.00 1050 8.82 — —
11,250 941 7.73 980 8.32 1017 8.90 1052 9.51 1088 10.16 — —
12,500 984 9.53 1022 10.19 1058 10.84 1093 11.49 — — — —
15,000 1057 13.49 1090 14.28 — — — — — — — —

9,000 866 5.20 899 5.85 950 6.65 989 7.38 1029 8.32 1077 9.74
10,500 902 6.60 942 7.14 980 7.70 1016 8.31 1051 8.99 1085 9.77
12,000 949 8.50 988 9.14 1026 9.76 1062 10.38 1095 11.01 — —
13,500 1000 10.78 1036 11.49 1073 12.21 — — — — — —
15,000 1057 13.49 1090 14.28 — — — — — — — —

0.0 0.2 0.4 0.6 0.8 1.0 1.2

Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp

RpmBhpRpmBhpRpmBhpRpmBhpRpmBhpRpmBhp

EXTERNAL STATIC PRESSURE (in. wg)

Table 10A — 40RU Standard Fan Performance Data —

0.0-2.4 in. wg External Static Pressure — English (cont)

EXTERNAL STATIC PRESSURE (in. wg)

1.41.61.82.02.22.4

See Legend and Notes on page 34.

30

Table 10B — 40RU Standard Fan Performance Data —

0-600 kPa External Static Pressure — SI

UNIT

40RUA*25
40RUS*25

40RUA*28
40RUS*28

40RUA*30
40RUS*30

See Legend and Notes on page 34.

UNIT

40RUA*25
40RUS*25

40RUA*28
40RUS*28

40RUA*30
40RUS*30

AIRFLOW

(L/s)

2830 8.86 0.94 9.48 1.04 10.65 1.26 11.84 1.53 13.01 1.85 14.10 2.19 15.08 2.53
3300 10.14 1.44 10.69 1.56 11.70 1.81 12.71 2.08 13.73 2.41 14.74 2.77 15.71 3.15
3780 11.43 2.11 11.93 2.25 12.84 2.52 13.71 2.81 14.60 3.14 15.49 3.51 16.39 3.91
4250 12.74 2.96 13.119 3.12 14.02 3.43 14.81 3.74 15.59 4.08 16.37 4.45 17.17 4.85
4720 14.05 4.01 14.47 4.19 15.23 4.54 15.96 4.88 16.66 5.24 17.36 5.62 18.07 6.03

3540 7.60 0.96 8.16 1.09 9.27 1.38 10.34 1.68 11.30 1.97 12.15 2.28 12.97 2.68
4130 8.68 1.47 9.18 1.62 10.13 1.94 11.07 2.29 11.99 2.63 12.84 2.97 13.60 3.32
4720 9.78 2.15 10.23 2.32 11.07 2.67 11.89 3.05 12.72 3.45 13.53 3.84 14.29 4.23
5310 10.89 3.01 11.30 3.20 12.06 3.59 12.80 4.00 13.53 4.43 14.27 4.88 14.99 5.33
5900 12.00 4.07 12.38 4.29 13.09 4.72 13.75 5.17 14.41 5.63 15.07 6.11 15.74 6.61

4250 8.68 1.48 9.17 1.68 10.27 2.07 11.27 2.41 12.19 2.77 13.03 3.13 13.81 3.50
4960 9.93 2.35 10.38 2.53 11.21 2.90 11.99 3.28 12.78 3.68 13.56 4.10 14.32 4.51
5660 11.21 3.45 11.63 3.66 12.38 4.07 13.08 4.49 13.76 4.93 14.45 5.39 15.14 5.87
6370 12.51 4.85 12.89 5.08 13.58 5.54 14.22 6.01 14.83 6.49 15.44 6.99 16.05 7.51
7080 13.82 6.59 14.17 6.85 14.81 7.36 15.40 7.88 15.97 8.40 16.52 8.94 17.06 9.49

AIRFLOW

(L/s)

2830 15.90 2.86 16.75 3.18 17.53 3.52 18.30 3.89 19.03 4.23 — —
3300 16.50 3.53 17.33 3.91 18.17 4.32 18.92 4.70 19.60 5.10 — —
3780 17.13 4.32 17.97 4.76 18.83 5.22 19.55 5.67 — — — —
4250 17.88 5.30 18.67 5.76 19.48 6.24 — — — — — —
4720 18.77 6.52 19.43 6.99 — — — — — — — —

3540 13.85 3.29 14.50 3.80 15.22 4.40 15.83 5.13 16.42 5.74 — —
4130 14.31 3.71 15.01 4.17 15.74 4.79 16.33 5.37 17.00 6.04 — —
4720 14.99 4.62 15.65 5.02 16.27 5.46 16.88 5.97 17.50 6.57 — —
5310 15.68 5.77 16.34 6.20 16.95 6.64 17.53 7.09 18.09 7.58 — —
5900 16.39 7.10 17.03 7.60 17.64 8.08 18.22 8.57 — — — —

4250 14.43 3.88 14.98 4.36 15.84 4.96 16.48 5.50 17.16 6.21 17.96 7.26
4960 15.04 4.92 15.71 5.32 16.33 5.74 16.93 6.20 17.51 6.70 18.09 7.29
5660 15.81 6.34 16.47 6.81 17.10 7.28 17.69 7.74 18.26 8.21 — —
6370 16.66 8.04 17.27 8.57 17.88 9.10 — — — — — —
7080 17.61 10.06 18.16 10.64 — — — — — — — —

r/s kW r/s kW r/s kW r/s kW r/s kW r/s kW r/s kW

EXTERNAL STATIC PRESSURE (kPa)

0 50 100 150 200 250 300

Table 10B — 40RU Standard Fan Performance Data —

0-600 kPa External Static Pressure — SI (cont)

EXTERNAL STATIC PRESSURE (kPa)

350 400 450 500 550 600

r/s kW r/s kW r/s kW r/s kW r/s kW r/s kW

See Legend and Notes on page 34.

31

Table 10C — 40RU High-Capacity Fan Performance Data —

0.0-2.4 in. wg External Static Pressure — English

UNIT

40RUA*25
40RUS*25

40RUA*28
40RUS*28

40RUA*30
40RUS*30

See Legend and Notes on page 34.

UNIT

40RUA*25
40RUS*25

40RUA*28
40RUS*28

40RUA*30
40RUS*30

AIRFLOW

(Cfm)

6,000 542 1.29 577 1042 646 1.72 716 2.09 785 2.51 849 2.95 907 3.40
7,000 620 1.99 652 2.15 711 2.48 771 2.85 831 3.28 890 3.76 947 4.27
8,000 700 2.92 728 3.10 781 3.46 833 3.85 885 4.29 938 4.78 990 5.32
9,000 781 4.10 806 4.30 854 4.71 900 5.13 946 5.58 993 6.08 1039 6.62

10,000 862 5.56 885 5.79 929 6.24 971 6.70 1012 7.18 1054 7.69 1096 8.24

7,500 476 1.39 510 1.58 579 1.99 644 2.40 701 2.81 752 3.29 804 3.96

8,750 545 2.14 574 2.35 633 2.81 691 3.29 747 3.77 797 4.25 842 4.76
10,000 615 3.12 641 3.36 692 3.87 743 4.41 794 4.96 843 5.51 888 6.05
11,250 685 4.37 709 4.64 754 5.20 800 5.79 845 6.40 891 7.02 935 7.64
12,500 756 5.92 778 6.22 819 6.83 860 7.47 901 8.14 942 8.83 983 9.52

9,000 539 2.18 569 2.39 626 2.85 683 3.34 739 3.83 791 4.32 837 4.82
10,500 620 3.37 646 3.62 695 4.13 744 4.68 793 5.25 842 5.83 888 6.41
12,000 701 4.94 724 5.22 769 5.80 811 6.40 854 7.04 897 7.69 940 8.36
13,500 783 6.95 804 7.27 844 7.91 883 8.57 920 9.26 958 9.97 996 10.71
15,000 865 9.45 884 9.81 921 10.52 956 11.24 991 11.98 1025 12.75 1059 13.54

AIRFLOW

(Cfm)

6,000 961 3.86 1011 4.31 1058 4.77 1104 5.24 1147 5.71 — —
7,000 1000 4.79 1050 5.32 1097 5.85 1142 6.38 1184 6.91 — —
8,000 1041 5.88 1090 6.47 1137 7.07 1181 7.67 — — — —
9,000 1086 7.21 1133 7.82 1178 8.47 ——————

10,000 11388.8311809.46————————

7,500 874 5.33 897 5.91 940 6.80 990 7.50 — — — —

8,750 886 5.36 930 6.13 982 7.32 1020 8.10 — — — —
10,000 930 6.60 969 7.20 1007 7.89 1045 8.71 — — — —
11,250 976 8.25 1014 8.86 1051 9.49 1086 10.17 — — — —
12,500 1023 10.20 1061 10.88 1097 11.56 ——————

9,000 881 5.37 923 6.03 967 6.89 1020 8.25 — — — —
10,500 930 6.97 970 7.55 1008 8.17 1045 8.86 — — — —
12,000 981 9.02 1021 9.67 1058 10.32 1094 10.97 — — — —
13,500 1035 11.45 1072 12.20 ————————
15,000 1093 14.35 — —————————

Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp

EXTERNAL STATIC PRESSURE (in. wg)

0.0 0.2 0.4 0.6 0.8 1.0 1.2

Table 10C — 40RU High-Capacity Fan Performance Data —

0.0-2.4 in. wg External Static Pressure — English (cont)

EXTERNAL STATIC PRESSURE (in. wg)

1.4 1.6 1.8 2.0 2.2 2.4

RpmBhpRpmBhpRpmBhpRpmBhpRpmBhpRpmBhp

See Legend and Notes on page 34.

32

Table 10D — 40RU High-Capacity Fan Performance Data —

0-600 kPa External Static Pressure — SI

UNIT

40RUA*25
40RUS*25

40RUA*28
40RUS*28

40RUA*30
40RUS*30

See Legend and Notes on page 34.

UNIT

40RUA*25
40RUS*25

40RUA*28
40RUS*28

40RUA*30
40RUS*30

AIRFLOW

(L/s)

2830 9.03 0.96 9.62 1.06 10.77 1.29 11.94 1.56 13.08 1087 14.15 2.20 15.12 2.54
3330 10.34 1.48 10.86 1.60 11.85 1.85 12.84 2.12 13.85 2.45 14.84 2.80 15.78 3.18
3780 11.67 2.17 12.14 2.31 13.02 2.58 13.88 2.87 14.75 3.20 15.63 3.56 16.50 3.96
4250 13.01 3.05 13.44 3.21 14.23 3.51 15.00 3.82 15.77 4.16 16.54 4.53 17.32 4.94
4720 14.36 4.15 14.75 4.32 15.48 4.66 16.18 4.99 16.87 5.35 17.56 5.73 18.26 6.14

3540 7.94 1.04 8.51 1.18 9.65 1.48 10.73 1.79 11.68 2.10 12.53 2.46 13.40 2.95
4130 9.08 1.59 9.57 1.75 10.55 2.10 11.52 2.46 12.45 2.81 13.28 3.17 14.04 3.55
4720 10.24 2.33 10.68 2.51 11.53 2.88 12.39 3.29 13.24 3.70 14.05 4.11 14.80 4.51
5310 11.42 3.26 11.81 3.46 12.57 3.88 13.33 4.32 14.09 4.77 14.85 5.24 15.58 570
5900 12.60 4.42 12.96 4.64 13.65 5.09 14.33 5.57 15.01 6.07 15.40 6.58 16.38 7.10

4250 8.99 1.62 9.49 1.78 10.44 2.12 11.39 2.49 12.32 2.86 13.18 3.22 13.95 3.59
4960 10.33 2.51 10.77 2.70 11.59 3.08 12.40 3.49 13.22 3.92 14.03 4.35 14.79 4.78
5660 11.68 3.68 12.07 3.90 12.81 4.33 13.52 4.77 14.23 5.25 14.95 5.74 15.66 6.23
6370 13.04 5.18 13.40 5.42 14.07 5.90 14.71 6.39 15.34 6.90 15.97 7.44 16.61 7.98
7080 14.42 7.05 14.74 7.31 15.36 7.84 15.94 8.38 16.51 8.93 17.08 9.51 17.65 10.10

AIRFLOW

(L/s)

2830 16.01 2.88 16.85 3.22 17.64 3.56 18.39 3.91 19.12 4.26 — —
3300 16.67 3.57 17.50 3.96 18.28 4.36 19.03 4.75 19.73 5.15 — —
3780 17.35 4.39 18.17 4.82 18.95 5.27 19.68 5.72 — — — —
4250 18.11 5.37 18.88 5.83 19.63 6.31 — — — — — —
4720 18.96 6.58 19.67 7.05 — — — — — — — —

3540 14.57 3.97 14.95 4.41 15.67 5.07 16.50 5.59 — — — —
4130 14.76 3.99 15.51 4.57 16.36 5.46 17.00 6.04 — — — —
4720 15.49 4.92 16.15 5.37 16.78 5.88 17.42 6.50 — — — —
5310 16.26 6.15 16.91 6.61 17.51 7.08 18.10 7.58 — — — —
5900 17.04 7.61 17.68 8.11 18.28 8.62 — — — — — —

4250 14.68 4.00 15.38 4.49 16.12 5.14 17.00 6.15 — — — —
4960 15.51 5.20 16.17 5.63 16.80 6.09 17.41 6.61 — — — —
5660 16.35 6.72 17.01 7.21 17.64 7.69 18.23 8.18 — — — —
6370 17.24 8.54 17.87 9.10 — — — — — — — —
7080 18.2210.70——————————

r/s kW r/s kW r/s kW r/s kW r/s kW r/s kW r/s kW

EXTERNAL STATIC PRESSURE (kPa)

0 50 100 150 200 250 300

Table 10D — 40RU High-Capacity Fan Performance Data —

0-600 kPa External Static Pressure — SI (cont)

EXTERNAL STATIC PRESSURE (kPa)

350 400 450 500 550 600

r/skWr/skWr/skWr/skWr/skWr/skW

See Legend and Notes on page 34.

33

Legend and Notes for Tables 10A and 10C

LEGEND

Bhp — Brake Horsepower Input to Fan
ESP — External Static Pressure

NOTES:

1. Maximum allowable fan speed for size 25 units is 1200 rpm .
Maximum allowable fan speed for size 28 and 30 units is 1100
rpm.

2. Fan performance is based on deductions for wet coil, clean 2-in.
filters, and unit casing. See table at right for factory-supplied filter
pressure drop.

3. Refer to fan motor and drive tables for additional data.

Legend and Notes for Tables 10B and 10D

LEGEND

ESP — External Static Pressure
NOTES:

1. Maximum allowable fan speed for size 25 units is 20 r/s.
Maximum allowable fan speed for size 28 and 30 units is 18.3 r/s.

2. Fan performance is based on deductions for wet coil, clean
51-mm filters, and unit casing. See table at right for factory-sup­plied filter pressure drop.

3. Refer to fan motor and drive tables for additional data.

FACTORY-SUPPLIED PRESSURE DROP — ENGLISH

UNIT

40RUA*25
40RUS*25

40RUA*28
40RUS*28

40RUA*30
40RUS*30

AIRFLOW

(Cfm)
6,000 0.12

8,000 0.19

10,000 0.26

7,500 0.15
10,000 0.22
12,500 0.30

9,000 0.19
12,000 0.29
15,000 0.40

PRESSURE DROP

(in. wg)

FACTORY-SUPPLIED PRESSURE DROP — SI

UNIT

40RUA*25
40RUS*25

40RUA*28
40RUS*28

40RUA*30
40RUS*30

AIRFLOW

(L/s)

2900 32
3800 47
4700 64

3500 36
4700 55
5900 76

4250 47
5650 71
7050 98

PRESSURE DROP

(Pa)

Copyright 2009 Carrier Corp • 7310 W. Morris St. • Indianapolis, IN 46231 Printed in Mexico Edition Date: 09/09 Catalog No: 40RU-03SI
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. Replaces: New

34

I. PRELIMINARY INFORMATION

START-UP CHECKLIST

(SPLIT SYSTEMS WITH 40RU UNITS)

OUTDOOR: MODEL NO. _________________________
SERIAL NO. ___________________________________
ADDITIONAL ACCESSORIES ______________________________________________________________________________

INDOOR: MODEL NO. ___________________________
SERIAL NO. ___________________________________

II. PRE-START-UP

OUTDOOR UNIT

IS THERE ANY SHIPPING DAMAGE? _______________ (Y/N) ____
IF SO, WHERE: _________________________________________________________________________________________

_______________________________________________________________________________________________________
WILL THIS DAMAGE PREVENT UNIT ST ART-UP? (Y/N) _____
CHECK POWER SUPPLY. DOES IT AGREE WITH UNIT? (Y/N) _____
HAS THE GROUND WIRE BEEN CONNECTED? (Y/N) _____
HAS THE CIRCUIT PROTECTION BEEN SIZED AND INSTALLED PROPERLY? (Y/N) _______
ARE THE POWER WIRES TO THE UNIT SIZED AND INSTALLED PROPERLY? (Y/N) _______
HAVE COMPRESSOR HOLDDOWN BOLTS BEEN LOOSENED? (Y/N) _____

CONTROLS

ARE THERMOST AT(S) AND INDOOR FAN CONTROL WIRING
CONNECTIONS MADE AND CHECKED? (Y/N) _____

ARE ALL WIRING TERMINALS (including main power supply) TIGHT? (Y/N) _____
HAVE OUTDOOR UNIT CRANKCASE HEATERS BEEN ENERGIZED FOR 24 HOURS? (Y/N) ______

INDOOR UNIT

HAS WATER BEEN PLACED IN DRAIN P AN T O CONFIRM PROPER DRAINAGE? (Y/N) _____
ARE PROPER AIR FIL TERS IN PLACE? (Y/N) _____
HAVE FAN AND MOTOR PULLEYS BEEN CHECKED FOR PROPER ALIGNMENT? (Y/N) ______
DO THE FAN BELTS HAVE PROPER TENSION? (Y/N) _____

PIPING

40RUA
HAS FOAM SHIPPING BLOCK BEEN REMOVED FROM THE TXV (Thermostatic Expansion Valve)? (Y/N) ______
ARE LIQUID LINE SOLENOID VALVES LOCA TED AT THE INDOOR UNIT COILS AS REQUIRED? (Y/N) _____
HAVE LEAK CHECKS BEEN MADE AT COMPRESSORS, CONDENSERS, INDOOR COILS,

TXVs (Thermostatic Expansion V alves) SOLE NOID VAL VES, FILTER DRIERS, AND FUSIBLE PLUGS
WITH A LEAK DETECTOR? (Y/N) _____

LOCATE, REPAIR, AND REPORT ANY LEAKS. _______________________________________________________________
HAVE ALL COMPRESSOR SER VICE VAL VES BEEN FULLY OPENED (BACKSEA TED) (Y/N) ____
ARE THE COMPRESSOR OIL SIGHT GLASSES SHOWING CORRECT LEVELS? (Y/N) _____
40RUS
HAS AIR BEEN BLED FROM SYSTEM? (Y/N) ___________________________________________
HAVE LEAK CHECKS BEEN MADE AT COMPRESSORS, CHILLERS, VALVES, AND INDOOR COILS? (Y/N)
LOCATE, REPAIR, AND REPORT ANY LEAKS. _______________________________________________________________

CL-1

CHECK VOLTAGE IMBALANCE

LINE-TO-LINE VOL TS: AB ________ V AC ______ V BC ______ V
(AB + AC + BC)/3 = A VERAGE VOLT AGE = _______ V
MAXIMUM DEVIA TION FROM AVERAGE VOLTAGE = _______ V
VOL TAGE IMBALANCE = 100 X (MAX DEVIATION)/(AVERAGE VOLTAGE) = __________ %
IF OVER 2% VOLTAGE IMBALANCE, DO NOT ATTEMPT TO START SYSTEM!

CALL LOCAL POWER COMPANY FOR ASSISTANCE.

III. START-UP

CHECK INDOOR FAN MOT OR SPEED AND RE CORD.
AFTER A T LEAST 10 MINUTES RUNNING TIME, RECORD THE FOLLOWING MEASUREMENTS:

OIL PRESSURE
SUCTION PRESSURE
SUCTION LINE TEMP
DISCHARGE PRESSURE
DISCHARGE LINE TEMP
ENTERING OUTDOOR UNIT AIR TEMP
LEAVING OUTDOOR UNIT AIR TEMP
INDOOR UNIT ENTERING AIR DB TEMP
INDOOR UNIT ENTERING AIR WB TEMP
INDOOR UNIT LEAVING AIR DB TEMP
INDOOR UNIT LEAVING AIR WB TEMP
OUTDOOR UNIT ENTERING WATER TEMP

(40RUS ONLY)
OUTDOOR UNIT LEAVING WATER TEMP

(40RUS ONLY)
INDOOR UNIT ENTERING WATER TEMP

(40RUS ONLY)
INTDOOR UNIT LEAVING WATER TEMP

(40RUS ONLY)

COMPRESSOR AMPS (L1/L2/L3) ____/____/____ ____/____/____

CHECK THE COMPRESSOR OIL LEVEL SIGHT GLASSES, ARE THE SIGHT GLASSES SHOWING
OIL LEVEL AT

1

/8 to 1/3 FULL? (Y/N) ______

COMP A1 COMP B1

NOTES:

______________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________

Copyright 2009 Carrier Corp • 7310 W. Morris St. • Indianapolis, IN 46231 Printed in Mexico Edition Date: 09/09 Catalog No: 40RU-03SI
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. Pg CL-2 Replaces: New

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