Carrier 62Mb Users Manual

62MD 62m-1si

62MD to the manual 11728cc6-bf0b-4b88-97a7-2aae092214b9

2015-01-24

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62MB,MC,MD,ME040-950
Energy Recovery
Ventilators

Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-58
Step 1 — Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Step 2 — Install Roof Curb . . . . . . . . . . . . . . . . . . . . . . . . 1

• STAND-ALONE APPLICATIONS
• COUPLED APPLICATIONS
Step 3 — Rigging and Handling . . . . . . . . . . . . . . . . . 45
• MOUNTING THE UNIT INDOORS
Step 4 — Installing ERV Transitions . . . . . . . . . . . . . . . 47
• ERV UNIT COUPLED WITH A 3 TO 12 1/2 TON
HVAC UNIT
Step 5 — Make Electrical Connections . . . . . . . . . . . . 47
• POWER SUPPLY
• ELECTRICAL CONNECTIONS
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59-75
Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Rain Hoods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Energy Recovery Wheel . . . . . . . . . . . . . . . . . . . . . . . . . 59
• DRIVE BELT
• AIR SEALS
Blower Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Airflow Settings and Adjustments. . . . . . . . . . . . . . . 59
• FACTORY SETTING
• CURVE SELECTION
• ADJUST THE ERV BLOWER SPEED
• MEASURE MOTOR VOLTAGE, AMPERAGE
AND FAN RPM
• BELT MAINTENANCE
Variable Air Volume Option. . . . . . . . . . . . . . . . . . . . . . 74
Operating Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
• OCCUPIED MODE
• UNOCCUPIED MODE
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75-78
Removing Wheel Segments for Cleaning
(62M170-950 Units). . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Removing and Installing Non-Segmented
Wheel for Cleaning (62M040 Units). . . . . . . . . . . . 75
Removing and Installing Non-Segmented
Wheel for Cleaning (62M075,120 Units) . . . . . . . 76
Installing Wheel Segments (62M170-950 Units). . . 76
Wheel Drive Motor and Pulley Replacement . . . . . 77
Belt Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78,79
START UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . CL-1

SAFETY CONSIDERATIONS

Untrained personnel can perform the basic maintenance
functions of cleaning coils and filters and replacing filters. All
other operations should be performed by trained service
personnel. When working on air-conditioning equipment,
observe precautions in the literature, tags and labels attached to
the unit, and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work
gloves. These instructions describe how to install, start up, and
service 62M energy recovery ventilator units.

Electrical shock can cause personal injury and death. Shut
off all power to this equipment during installation. There
may be more than one disconnect switch. Tag all disconnect locations to alert others not to restore power until work
is completed.

INTRODUCTION
The 62M energy recovery ventilator (ERV) units recover
energy from building exhaust air and pre-condition ventilation
air. All ERV units are available in either vertical discharge
(through the bottom) or horizontal discharge configuration.
The 62MB and MC vertical discharge units are used when a
stand-alone ERV unit is required.
The 62MD and ME horizontal discharge unit can be used as
a stand-alone unit, or can also be coupled with a Carrier rooftop
unit.

INSTALLATION
Step 1 — Inspection — Inspect the unit; file a claim
with the shipping company if the unit is damaged. Check the
packing list to ensure that the correct items have been received
and notify your Carrier representative of any discrepancy.
Step 2 — Install Roof Curb
STAND-ALONE APPLICATIONS — The ERV unit can be
installed without being coupled with a Carrier rooftop unit. The
ERV units can be installed in one of three stand-alone applications: down discharge, horizontal discharge, or a combination
of both down discharge and horizontal discharge.
When installing a stand-alone ERV unit refer to Fig. 1-45
and, complete the following:
Locate the Roof Curb — Prior to locating the roof curb consider the structural support required for the rooftop system and,
the duct drop location in relation to the joists. Allow sufficient
space for service, clearance, and locations of vents or other
sources of air.

Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 536-220
Printed in U.S.A.
Form 62M-1SI
Pg 1
1-06
Replaces: New
Book 1
4
Tab 10a 12a

Cover roof opening if installation of the ERV unit will not
be immediate. Failure to cover roof opening could result in
water damage and/or serious personal injury.

END

Assemble the Roof Curb — Connect the curb side and the
curb end. See Fig. 1. Insert the tabs on the curb end into the
slots on the curb sides. Press firmly until the pieces lock into
place. It may be necessary to exert additional force to the top of
the curb to lock the pieces in place. Ensure the curb pieces are
locked together prior to proceeding.
Repeat for all corners of the roof curb.
Prepare Roof Curb Location — Cut a hole in the roof for duct
openings. See Fig. 2-5 for duct opening dimensions. Frame the
opening to provide adequate structural support.
Install Deck Pans and Duct Supports — The roof curb may
have a duct support and deck pans, depending on the model
and application. Determine which end of the roof curb will be
the duct end.
Install the deck pans on the roof curb with the insulation
side facing up toward the ERV base. Install the duct support
between the supply and return openings.
Set the Roof Curb — Fit the roof curb assembly by measuring
across the corners of the curb to ensure a square fit. Set the roof
curb over the roof opening. Level the curb by placing shims
under the bottom flange of the curb. Secure the curb in place by
welding or fastening the curb to the roof.

SIDE

Fig. 1 — Assembling the Roof Curb

for applying roofing materials. The roofing material should
extend up to the wood nailer and be secured under the counterflashing. Follow all local, national, and industry roofing
standards. Refer to Fig. 6 for roofing recommendations.
COUPLED APPLICATIONS — The ERV unit can be installed directly coupled to a Carrier rooftop unit. The connection between the ERV and HVAC (Heating, Ventilation, and
Air Conditioning) unit is made with the use of a transition. In a
coupled rooftop application there is a separate roof curb for the
HVAC curb and a separate roof curb for the ERV unit. See
Fig. 4 and 5 for roof curb dimensions.
Locate the Roof Curb — Prior to locating the roof curb consider the structural support required for the rooftop system and,
the duct drop location in relation to the joists. Allow sufficient
space for service, clearance, and locations of vents or other
sources of air. Refer to the rooftop installation instructions for
more information regarding location considerations.
Assemble the Roof Curb — Connect the curb side and the
curb end. Insert the tabs on the curb end into the slots on the
curb sides. Press firmly until the pieces lock in to place. It may
be necessary to exert additional force to the top of the curb to
lock the pieces in place. Ensure the curb pieces are locked together prior to proceeding.
Repeat for other corners of the roof curb.
NOTE: If lifting or moving the roof curb assembly hammer
the tabs over 90 degrees.
Install Deck Pans and Duct Supports — The roof curb may
have a duct support and deck pans, depending on the model
and application. Refer to Fig. 2-5. Determine which end of the
roof curb will be the duct end.
Install the deck pans on the roof curb with the insulation
side facing up toward the ERV base. Install the duct support
between the supply and return openings.
Install Locator Pieces — Some ERV roof curbs (62MA-CRB14MC and 62MB-CRB-14MC) will include locator pieces,
which are to be attached to the ERV roof curb section. The
locator pieces will help the installer ensure that the ERV and
HVAC unit roof curbs are positioned properly. Attach the
2 side locator pieces to the ERV roof curb. Install the cover
panel over the 2 sides and fasten in place.

Cover the roof curb if installation of the ERV unit will not
be immediate. Failure to cover the roof curb could result in
water damage and/or serious personal injury.
Install Ductwork — Ductwork will be installed in the roof
curb for vertical discharge and stand-alone applications. The
duct will hang from the top of the curb. See Fig. 45 for standalone application airflow.
NOTE: Ductwork must be installed before the ERV unit is set
in place.
Refer to Fig. 2-5 to determine the duct size required.
Provide field manufactured duct and place into the supply and
return openings in the curb.
Install Gaskets — The ERV roof curbs come with a gasketing
package to provide a seal between the ERV unit and the top
perimeter of the roof curb. Install the gasket around the top
perimeter of the curb and around the supply and return opening.
NOTE: Some stand-alone curbs will not have duct openings).
Gasket strips must fit tightly together, leaving no gaps for
leakage.
IMPORTANT: Gasket installation is critical for water
integrity. Improperly installed gaskets can result in air
or water leaks, leading to poor unit performance.
Install Roofing Materials — Insulate and add a cant strip to
the roof curb. Follow suggested and acceptable roofing practices

Set the Roof Curb — Fit the roof curb assembly by measuring
across the corners of the curb to ensure a square fit. Set the roof
curb over the roof opening. Level the curb by placing shims
under the bottom flange of the curb. Secure the curb in place by
welding or fastening the curb to the roof.

Refer to Fig. 2 and 3 to determine the duct size required.
Provide field manufactured duct and place into the supply and
return openings in the curb.
Install Gaskets — The ERV roof curbs come with a gasketing
package to provide a seal between the ERV unit and the top
perimeter of the roof curb. Install the gasket around the top
perimeter of the curb and around the supply and return
opening. (Some stand-alone curbs will not have duct openings.) Gasket strips must fit tightly together, leaving no gaps for
leakage.

IMPORTANT: The ERV roof curb must be set in
precisely the correct location relative to the rooftop
roof curb for the transitions to connect properly. See
Fig. 7-44 for location dimensions.

IMPORTANT: Gasket installation is critical for water
integrity. Improperly installed gaskets can result in air
or water leaks, leading to poor unit performance.

Install Ductwork — Ductwork will be installed in the roof
curb for vertical, coupled applications. The duct will hang from
the top of the curb.
NOTE: Ductwork must be installed before the rooftop unit is
set in place.
NOTE: Ductwork must be installed before the ERV unit is set
in place.

Install Roofing Materials — Insulate and add a cant strip to
the roof curb. Follow suggested and acceptable roofing procedures for applying roofing materials. The roofing material
should extend up to the wood nailer and be secured under the
counter flashing. Follow all local, national, and industry roofing standards. Refer to Fig. 5 for roofing recommendations.

24.09

SUPPLY
1.00
TYP. 4X

10.81

22.94
RETURN

14.00

11.50

3.00
TYP. 4X
11.00

NOTES:
1. All dimensions are in inches.
2. Roof curb shipped unassembled.

Fig. 2 — Roof Curb — 62M040 for Stand-Alone Applications

Typical Insulated deck pans.
(Insulation face up) *
D

S/A
E

R/A
G
H

LEGEND
R/A — Return Air
S/A — Supply Air

*IMPORTANT: Insulation on deck pans must face up.
NOTE: Roof curb shipped unassembled.
DIMENSIONS (in.)

62M UNIT SIZE

CURB
PART NO.

075,120
170-285
330-640
750,950

62M-A-CRB-14S
62M-B-CRB-14S
62M-C-CRB-14S
62M-D-CRB-14S

27
45.5
55.41
86.25

30.5
49.63
60.34
95.7

14
14
14
14

14
17.5
24.84
32.5

11.3
19.5
23.41
42.13

1
2
2
2

G
14.7
24
30
42.13

Duct Sizes
Return
Supply
13.75 x 14.38
13.75 x 11
17 x 23.5
17 x 19
24.5 x 29.5
24.5 x 23
32 x 41.75
32 x 41.75

H
1.5
1.75
—
—

Fig. 3 — Roof Curb — 62M075-950 for Vertical Stand-Alone Applications

C
ERV Curb

LEGEND
ERV — Energy Recovery Ventilator
NOTE: Roof curb shipped unassembled.

62M UNIT SIZE

CURB
PART NO.

075,120*
170-285†
330-640
750,950

62M-A-CRB-14S
62M-B-CRB-14S
62M-C-CRB-14M
62M-D-CRB-14M

A
27
49.63
60.34
95.7

DIMENSIONS (in.)
B
C
30.5
14
14
45.5
14
55.41
14
86.25

D
1.5
1.75
1.75
1.75

*62M075,120 curb is shipped with deckpans insulation and duct supports which may
be discarded.
†62M170-285 curb is shipped with deck pans and insulation.

Fig. 4 — Roof Curb — 62M075-950 for Horizontal Stand-Alone Applications
or Units Coupled with Rooftop Units 15 Tons and Above
4

ERV Curb

Must be Watertight

Locator pieces to connect
ERV curb to rooftop unit curb

LEGEND
ERV — Energy Recovery Ventilator
NOTE: Roof curb shipped unassembled.

62M UNIT SIZE

CURB
PART NO.

075,120
170-285

62M-A-CRB-14MC
62M-B-CRB-14MC

A
30.5
49.63

DIMENSIONS (in.)
B
C
D
14
27
1.5
14
45.5
1.75

Fig. 5 — Roof Curb — 62M075-285 Units 3 to 121/2 Ton Rooftop Units

GASKETING
ROOF CURB
NAIL*
RIGID
INSULATION*

FLASHING*

CANT STRIP*
ROOF FELT*

ROOF DECK*
ROOF*

*Field provided.

Fig. 6 — Roofing Materials — Recommendation

E
19.81
37.81

25.12

12.45

7.53

3.52

13.25

29.98

RETURN
AIR*

12.75

RIGHT SIDE

REAR SIDE

.75

SUPPLY
AIR

10.75

VIEW A-A

27.19

19.75

2.33

3.95

10.50

11.15

3.91

25.12
29.75

5.34

31.24

29.75
27.19

LEFT SIDE

ERV
WHEEL

4.83
7.13

TOP SIDE

45.75

SUPPLY AIR
(OPTIONAL)

OPTIONAL
(INDOOR) PREHEATER

16.00

22.90

12.45

11.09

3.95
3.48

POWER
ENTRY

OPTIONAL
INDOOR PREHEATER

19.25

Fig. 7 — 62MB,MC040 Indoor Unit Dimensions

HORIZONTAL
UNITS ONLY*

RETURN AIR
(OPTIONAL)

A
16 in.
0 in.
18 in.
18 in.

29.88

OUTSIDE
AIR

13.26
2.67

FRONT SIDE

EXHAUST
AIR

8.43

7.69

16.02

*30 in. service clearance required
on either Left or Right side for
ERV wheel removal.
NOTE: All dimensions are in
inches.

Front
Rear
Left*
Right*

REQUIRED SERVICE
CLEARANCES

5.35
EXHAUST AIR HOOD

12.29

OUTSIDE AIR HOOD

13.72

12.45

7.53

3.52

29.98

RETURN
AIR*

12.75

REAR SIDE

.75

SUPPLY
AIR

10.75

RIGHT SIDE

VIEW A-A

19.75

2.33

3.55
TOP OF CURB

29.75

3.95

10.50

11.15

3.91

5.34

TOP SIDE

45.75

SUPPLY AIR
(OPTIONAL)

LEFT SIDE

29.75

ERV
WHEEL

4.83
7.13

13.5

13.38

16.00

12.96

EXHAUST AIR HOOD

OUTSIDE AIR HOOD

12.45

11.09

3.95
3.48

POWER
ENTRY

OUTSIDE AIR HOOD AND
OPTIONAL PREHEATER

EXHAUST AIR HOOD

11.00

5.31

8.97

16.00

Fig. 8 — 62MD,ME040 Outdoor Unit Dimensions

HORIZONTAL
UNITS ONLY*

RETURN AIR
(OPTIONAL)

27.5 in.
10 in.
20 in.
20 in.

29.88

OUTSIDE
AIR

13.26
2.67

FRONT SIDE

EXHAUST
AIR

8.43

7.69

16.02

*30 in. service clearance required
on either Left or Right side for
ERV wheel removal.
NOTE: All dimensions are in
inches.

Front
Rear
Left*
Right*

REQUIRED SERVICE
CLEARANCES

REAR SIDE

5.58

37.14

6.18

12.98

3.46

9.25

6.65

LEFT SIDE

3.63

ACCESS DOOR

42.6

TOP SIDE

21.10

10.93

6.60
10.39

10.50

2.10

EXHAUST AIR

15.40

10.66

11.00

18.88

OPTIONAL PREHEATER

PREHEATER CABINET

OPTIONAL
PREHEATER
(INDOOR)

(OPTIONAL)
AIRFLOW TEST
PORTS

EXHAUST AIR OUTLET

19.04

Fig. 9 — 62MB,MC075,120 Indoor Unit Dimensions

OPTIONAL RETURN AIR
(BOTTOM RETURN ONLY)

POWER ENTRY / OPTIONAL
DISCONNECT LOCATION

6.97

3.34

5.58

RETURN

14.50

10.32

18.63

SUPPLY

11.00

RIGHT SIDE

VIEW A-A

6.13

18.63

5.53

12.90

21.10

SUPPLY AIR
(BOTTOM SUPPLY ONLY)

31 in.
0 in.
24 in.
39 in.

15.25

FRONT SIDE

OUTSIDE AIR

39.03

8.63

23.00

3.88

NOTE: All dimensions are in inches.

*39 in. service clearance required
for ERV wheel removal.

Front
Rear
Left
Right*

REQUIRED SERVICE
CLEARANCES

6.39

10.25

11.06

2.86

18.74

SUPPLY

9.19

REAR SIDE

6.43

RIGHT SIDE

VIEW A-A

10.32

14.45

3.10

RETURN

39.8

ACCESS DOOR

43.10

6.97

18.55

6.18

12.98

3.46

9.25

6.65

10.93

6.60
10.39

42.60

TOP SIDE

2.87

9.60

19.04

A
OUTDOOR AIR HOOD
.87

9.59

13.24

AIRFLOW
TEST PORTS
(OPTIONAL)

OPTIONAL PREHEATER

18.69

Fig. 10 — 62MD,ME075,120 Outdoor Unit Dimensions

LEFT SIDE

10.35

ERV WHEEL

ACCESS DOOR

4.11
TOP OF CURB

SEE DETAIL
A

DETAIL A

EXHAUST AIR HOOD

OPTIONAL RETURN AIR
(BOTTOM RETURN ONLY)

POWER ENTRY/
OPTIONAL DISCONNECT
*NOTE*
DISCONNECT
LOCATION IS APPROXIMATE

5.62

37.14

SUPPLY AIR
(BOTTOM SUPPLY ONLY)

31 in.
0 in.
24 in.
39 in.

9.60

FRONT SIDE

35.711

39.03

NOTE: All dimensions are in inches.

*39 in. service clearance required
for ERV wheel removal.

Front
Rear
Left
Right*

REQUIRED SERVICE
CLEARANCES

9.62

20.00

49.55

6.92

26.60

REAR SIDE

RIGHT SIDE

23.00

3.16

RETURN
AIR

6.48

VIEW A-A

SUPPLY
AIR

15.50

21.84

ACCESS DOOR

26.60

10.76

8.20

25.00

AIRFLOW TEST
PORTS (OPTIONAL)

43.38

6.10

22.33

15.63

8.20

15.28

13.75

LEFT SIDE

62.03

TOP SIDE

EXHAUST AIR OUTLET

8.68

EXHAUST AIR

14.86

12.50

14.57

POWER ENTRY
(OPTIONAL DISCONNECT)

8.21

ERV WHEEL

Fig. 11 — 62MB,MC170-285 Indoor Unit Dimensions

RETURN AIR OPENING

SUPPLY AIR OPENING

PREHEATER CABINET

Front
Rear
Left
Right*

39 in.
0 in.
32 in.
55 in.

REQUIRED SERVICE
CLEARANCES

ACCESS DOOR

26.60

22.00

OUTSIDE AIR

FRONT SIDE

57.91

11.18

36.00

NOTE: All dimensions are in inches.

*55 in. service clearance required for
ERV wheel removal.

OPTIONAL PREHEATER

9.16

20.78

9.62

20.00

6.92

SUPPLY
AIR

15.50

RIGHT SIDE

REAR SIDE

VIEW A-A

OUTSIDE AIR HOOD

23.00

3.16

RETURN
AIR

6.48

8.20

25.00

49.55

6.10

22.33

15.63

8.20

15.28

13.75

LEFT SIDE

62.03

EXHAUST AIR

8.21

ERV WHEEL

12.50

14.57

26.45

.64

OPTIONAL PREHEATER

POWER ENTRY
(OPTIONAL DISCONNECT)
14.86

16.19

OUTSIDE AIR HOOD

TOP SIDE

EXHAUST AIR HOOD

8.68

6.94

15.96

Fig. 12 — 62MD,ME170-285 Outdoor Unit Dimensions

43.38

RETURN AIR OPENING

SUPPLY AIR OPENING

14.84

57.91

4.61
TOP OF CURB

OUTSIDE AIR HOOD

NOTE: All dimensions are in inches.

FRONT SIDE

EXHAUST AIR HOOD

39 in.
0 in.
32 in.
55 in.

*55 in. service clearance required for
ERV wheel removal.

Front
Rear
Left
Right*

REQUIRED SERVICE
CLEARANCES

6.11

37.50

65.21

REAR SIDE

RETURN
AIR

SUPPLY
AIR

6.61

28.50

19.00

7.66

RIGHT SIDE

VIEW A-A

ACCESS DOOR

29.00

2.87

14.63

6.11

37.50

8.01

LEFT SIDE

TOP SIDE

72.63
17.00

20.00

EXHAUST
AIR

OPTIONAL AIRFLOW
TEST PORTS

EXHAUST AIR OUTLET

21.11

6.88

50 in.
0 in.
40 in.
62 in.

2.78

ACCESS
DOOR

29.00

OUTSIDE
AIR

5.11
27.00

FRONT SIDE

67.39

9.03

54.00

NOTE: All dimensions are in inches.

*62 in. service clearance required
for ERV wheel removal.

Front
Rear
Left
Right*

REQUIRED SERVICE
CLEARANCES

OPTIONAL PREHEATER

PREHEATER CABINET

POWER ENTRY
(OPTIONAL DISCONNECT)

Fig. 13 — 62MB,MC330-640 Indoor Unit Dimensions

49.1

6.93

25.76

18.62

RETURN AIR OPENING
(BOTTOM RETURN ONLY)

SUPPLY AIR OPENING
(BOTTOM SUPPLY ONLY)

15.94

8.68

OUTSIDE AIR HOOD

6.11

37.50

26.41

REAR SIDE

2.87

RETURN
AIR

SUPPLY
AIR

6.61

28.50

19.00

7.66

RIGHT SIDE

VIEW A-A

6.93

25.76

49.1

RETURN AIR OPENING
(BOTTOM RETURN ONLY)

SUPPLY AIR OPENING
(BOTTOM SUPPLY ONLY)

18.62

8.01

LEFT SIDE

19.69

72.63

20.00

EXHAUST
AIR

17.00

OPTIONAL AIRFLOW
TEST PORTS

TOP SIDE

EXHAUST AIR HOOD

21.11

15.94
6.88

12.52
EXHAUST AIR HOOD

9.22

17.96

OPTIONAL PREHEATER

POWER ENTRY
(OPTIONAL DISCONNECT)

7.63

OUTSIDE AIR HOOD

29.44

Fig. 14 — 62MD,ME330-640 Outdoor Unit Dimensions

6.11

37.50

65.21

18.81

50 in.
0 in.
40 in.
62 in.

FRONT SIDE

67.39

A 4.21
TOP OF
CURB

OUTSIDE AIR HOOD

NOTE: All dimensions are in inches.

*62 in. service clearance required
for ERV wheel removal.

Front
Rear
Left
Right*

REQUIRED SERVICE
CLEARANCES

7.69

13.11

16.19

28.00

SUPPLY
AIR

RIGHT SIDE

REAR SIDE

35.75

RETURN AIR

VIEW A-A

21.86

ACCESS DOOR

34.10

7.69

49.01

77.41

21.88

17.07

6.42

AIRFLOW TEST
PORTS (OPTIONAL)

LEFT SIDE

23.25

107.75

TOP SIDE

EXHAUST AIR OUTLET

31.67

18.75

EXHAUST AIR

9.01

48.98

40.12

Front
Rear
Left
Right*

65 in.
0 in.
50 in.
72 in.

REQUIRED SERVICE
CLEARANCES

2.37

ACCESS DOOR

34.10

35.08

11.31

OUTSIDE AIR

12.77

FRONT SIDE

98.37

9.52

64.25

NOTE: All dimensions are in inches.

*72 in. service clearance required
for ERV wheel removal.

OPTIONAL PREHEATER

PREHEATER CABINET

POWER ENTRY/
OPTIONAL DISCONNECT
LOCATION

34 7/8

11.02

Fig. 15 — 62MB,MC750,950 Indoor Unit Dimensions

20.25

RETURN AIR OPENING

6.43

34.73

SUPPLY AIR OPENING

8.83

7.69

33.71

13.11

16.19

28.00

SUPPLY
AIR

REAR SIDE

RIGHT SIDE

VIEW A-A

OUTSIDE AIR HOOD

35.75

RETURN AIR

7.69

49.01

B
4.40

77.41

21.88

17.07

6.42

31.67

AIRFLOW TEST
PORTS (OPTIONAL)

23.22

EXHAUST AIR

TOP SIDE

LEFT SIDE

23.25

107.75

EXHAUST AIR HOOD

18.75

17.16

34 7/8

9.01

48.98

21.58

2.89

23.81

OPTIONAL PREHEATER

40.12

11.02

POWER ENTRY/
OPTIONAL DISCONNECT
LOCATION

OUTSIDE AIR HOOD

Fig. 16 — 62MD,ME750,950 Outdoor Unit Dimensions

20.25

RETURN AIR OPENING

6.43

34.73

SUPPLY AIR OPENING

65 in.
0 in.
50 in.
72 in.

EXHUAST AIR HOOD

FRONT SIDE

98.37

OUTSIDE AIR HOOD

NOTE: All dimensions are in inches.

*72 in. service clearance required
for ERV wheel removal.

Front
Rear
Left
Right*

REQUIRED SERVICE
CLEARANCES

Rooftop Unit

Filter access door
shipped with Rooftop
Unit

62M040 Unit

Outside air hood
with aluminum
water entrainment filter.
Includes barometric intake
damper.

Exhaust
hood

Evaporation
Coil

Filter

Filters
Accessory ERV
Equipment support

Standard Rooftop
Unit roof curb

EXH

TRANSITION DETAIL
Supply
Blower

Panel covering
return chamber

3 to 6 Ton Rooftop Unit
Outside
air hood

Filter

ERV
wheel

Accessory Transition

ROOF CURB LOCATION DETAIL
3”
Access door to
adjust balancing
damper

To 62M040 Unit
Balancing damper

Supply

A
Return

35”

67 3/8”

Rooftop
Unit
Curb

Accessory ERV
Equipment support

35"

ERV
Unit
Support

Side View A-A
Rooftop Curb

LEGEND
ERV — Energy Recovery Ventilator

37”

Top View
ROOFTOP UNIT MODEL
48/50HJ,TJ,TM

ROOFTOP SIZE
004-007

TRANSITION P/N
62M-AATR-HJ36-D

ROOFTOP ECONOMIZER
62MA-900---004

ERV EQUIPMENT SUPPORT P/N
62MA-900---001

Fig. 17 — 62MD,ME040 Coupled with Carrier 48/50HJ,TJ,TM004-007 Vertical Discharge Rooftop Unit

Rooftop Unit

Filter access door
shipped with Rooftop
Unit

62M040 Unit

Field-Supplied
Duct

Exhaust
hood

Outside air hood
with aluminum
water entrainment filter.
Includes barometric intake
damper.

Filter
Accessory ERV
Equipment support

Standard Rooftop
Unit roof curb

EXH

TRANSITION DETAIL
Supply
Blower

Panel covering
return chamber

3 to 6 Ton Rooftop Unit
Outside
air hood

Filter

ERV
wheel

Accessory Transition

ROOF CURB LOCATION DETAIL
3”
Access door to
adjust balancing
damper

To 62M040 Unit
Balancing damper

Supply

Return

35”

67 3/8”

Rooftop
Unit
Curb

Accessory ERV
Equipment support

35"

ERV
Unit
Support

Side View A-A
Rooftop Curb

LEGEND
ERV — Energy Recovery Ventilator

37”

ROOFTOP UNIT MODEL
48/50HJ,TJ,TM

ROOFTOP SIZE
004-007

TRANSITION P/N
62M-AATR-HJ36-D

ROOFTOP ECONOMIZER
62MA-900---008

ERV EQUIPMENT SUPPORT P/N
62MA-900---001

Fig. 18 — 62MD,ME040 Coupled with Carrier 48/50HJ,TJ,TM004-007 Horizontal Discharge Rooftop Unit

Rooftop Unit

Accessory Transition
(Includes front panel)
Rooftop Unit

Supply

TRANSITION DETAIL

Return

Accessory ERV
Equipment support

Accessory Transition

Filter

2 Piece front
panel covers
return chamber

ERV
wheel
Filter
62M040 Unit

Exhaust
hood
Outside air hood
Top View

ROOF CURB LOCATION DETAIL
To 62M040 Unit
Access door to
adjust balancing
damper

35”

80 5/16”

44 11/16”
Supply

Return

Rooftop
Unit
Curb

4 3/8”

35"

ERV
Unit
Support

Rooftop Curb

LEGEND
ERV — Energy Recovery Ventilator

ROOFTOP UNIT MODEL
48/50PG

Accessory ERV
Equipment support

ROOFTOP SIZE
03-07

TRANSITION P/N
62M-AATR-HJ36-D

Side View A-A

ERV EQUIPMENT SUPPORT P/N
62MA-900---001

Fig. 19 — 62MD,ME040 Coupled with Carrier 48/50PG03-07 Vertical Discharge Rooftop Unit

Rooftop Unit

Accessory Transition
(Includes front panel)
Rooftop Unit

TRANSITION DETAIL
Accessory ERV
Equipment support

Accessory Transition
2 Piece front
panel covers
return chamber

Filter

ERV
wheel
Filter
62M040 Unit

Exhaust
hood
Outside air hood
Top View

ROOF CURB LOCATION DETAIL

44 11/16”

To 62M040 Unit

Access door to
adjust balancing
damper

35”

80 5/16”

Rooftop
Unit
Curb

4 3/8”

35"

ERV
Unit
Support

Rooftop Curb

LEGEND
ERV — Energy Recovery Ventilator

ROOFTOP UNIT MODEL
48/50PG

Accessory ERV
Equipment support

ROOFTOP SIZE
03-07

TRANSITION P/N
62M-AATR-HJ36-D

Side View A-A

ERV EQUIPMENT SUPPORT P/N
62MA-900---001

Fig. 20 — 62MD,ME040 Coupled with Carrier 48/50PG03-07 Horizontal Discharge Rooftop Unit

ROOF CURB LAYOUT

TOP VIEW

67 3/8"

A
Supply
Air

Standard roof curb for
3 to 6 ton rooftop unit

37 3/16"

Return
Air

35 "

3"
34 3/8"
36"
62MA-900---001
Equipment Support

"A-A" SIDE VIEW
Standard Roof curb
for 3 to 6 ton roof top unit
35 "
62MA-900---001
Equipment Support
14"
10.4" Roof

Fig. 21 — 62MD,ME040 Coupled with Carrier 48/50HJ,TJ,TM004-007 Rooftop Unit

Filter door shipped
with Rooftop unit.

62M ERV Unit

Rainhoods for
optional economizer

Rooftop unit

Unit curb
Accessory Transition

RETURN

ERV Wheel

62M075,120 ERV Unit

SUPPLY

Locator
pieces
(included with ERV curb
ERV curb,
must be watertight)

ROOF CURB LOCATION DETAIL

Rooftop
Unit curb

Locator Pieces ( included with ERV Curb)
Cover panel provided
30.5”

ERV

NOTE: When using a 62M ERV unit coupled with a Carrier
rooftop unit, the rooftop factory or field-installed economizer
cannot be used. Use the 62M economizer instead.

27”

2 3/4"

LEGEND
— Energy Recovery Ventilator

ERV curb

20"

ROOFTOP UNIT
MODEL
48/50HJ,TF,TJ,TM

TRANSITION P/N

ERV CURB P/N

ROOFTOP
ECONOMIZER

004-007

62M-ATR-HJ36-D

62M-A-CRB-14MC

62MA-900---004

DIMENSIONS (in.)
A
B
673/8
373/16

008,009

62M-ATR-HJ78-D

62M-A-CRB-14MC

62MA-900---005

781/4

012,014

62M-ATR-HJ1012-D

62M-A-CRB-14MC

62MA-900---006

781/4

ROOFTOP SIZE

Fig. 22 — 62MD,ME075,120 Coupled with Carrier 48/50HJ,TF,TJ,TM004-014 Vertical Discharge Rooftop Unit

Filter door shipped
with Rooftop unit.

62M ERV Unit

Horizontal supply and
return duct (field supplied)

Rooftop unit

Rooftop Unit

Accessory Transition
62M075,120
ERV Unit
ERV Wheel

Locator
pieces
(included with
ERV curb
ERV curb,
must be watertight)

Optional Horizontal
Economizer

ROOF CURB LOCATION DETAIL

Rooftop
Unit curb

Locator Pieces ( included with ERV curb)
Cover panel provided
30.5"

ERV

NOTE: When using a 62M ERV unit coupled with a Carrier
rooftop unit, the rooftop factory or field-installed economizer
cannot be used. Use the 62M economizer instead.

27"

2 3/4"

LEGEND
— Energy Recovery Ventilator

ERV curb

20"

ROOFTOP UNIT
MODEL
48/50HJ,TF,TJ,TM

TRANSITION P/N

ERV CURB P/N

ROOFTOP
ECONOMIZER

004-007

62M-ATR-HJ36-H

62M-A-CRB-14MC

62MA-900---008

DIMENSIONS (in.)
A
B
673/8
373/16

008,009

62M-ATR-HJ78-H

62M-A-CRB-14MC

62MA-900---009

781/4

012,014

62M-ATR-HJ1012-H

62M-A-CRB-14MC

62MA-900---010

781/4

ROOFTOP SIZE

Fig. 23 — 62MD,ME075,120 Coupled with Carrier 48/50HJ,TF,TJ,TM004-014 Horizontal Discharge Rooftop Unit

Rooftop Unit

Rooftop Unit
Accessory Transition
(Includes front panel)

62M ERV Unit

Supply

Return

Accessory
Transition
Locator
pieces
(included with
ERV Curb
ERV curb,
must be watertight)

ERV Wheel
62M075,120 ERV Unit

ERV

LEGEND
— Energy Recovery Ventilator

NOTE: When using a 62M ERV unit coupled with a Carrier
rooftop unit, the rooftop factory or field-installed economizer cannot be used.

TOP VIEW

ROOF CURB LOCATION DETAIL
20"

ERV Curb
30 1/12"

Curb Detail
A

B
27"
Supply

Return

2 3/4"

Rooftop
Unit
Curb

ERV
Unit
Curb

20"

Side View A-A

Rooftop Unit Curb
Locator pieces
(included with
ERV Curb)

ROOFTOP MODEL
48/50PG

62M TRANSITION

ERV CURB

03-07

62M-ATR-PG26-D

62M-A-CRB-14MC

DIMENSIONS (in.)
A
B
805/16
4411/16

08-14

62M-ATR-PG712-D

62M-A-CRB-14MC

923/4

ROOFTOP SIZE

5315/16

Fig. 24 — 62MD,ME075,120 Coupled with Carrier 48/50PG03-14 Vertical Discharge Rooftop Unit

Rooftop Unit

Rooftop Unit
Accessory Transition
(Includes front panel)

62M Unit

Accessory
Transition
Locator
pieces
(included with
ERV curb,
must be watertight)

ERV Wheel
62M075-120 ERV Unit

ERV

ERV Curb

LEGEND
— Energy Recovery Ventilator

NOTE: When using a 62M ERV unit coupled with
a Carrier rooftop unit, the rooftop factory or fieldinstalled economizer cannot be used.

TOP VIEW

ROOF CURB LOCATION DETAIL
20"

ERV Curb
30 1/12"

Curb Detail
A

A
27"
2 3/4"

Rooftop
Unit
Curb

20"

ERV
Unit
Curb

Side View A-A
Rooftop Unit Curb
Locator pieces
(included with
ERV Curb)

ROOFTOP MODEL
48/50PG

62M TRANSITION

ERV CURB

03-07

62M-ATR-PG26-H

62M-A-CRB-14MC

DIMENSIONS (in.)
A
B
805/16
4411/16

08-14

62M-ATR-PG712-H

62M-A-CRB-14MC

923/4

ROOFTOP SIZE

5315/16

Fig. 25 — 62MD,ME075,120 Coupled with Carrier 48/50PG03-14 Horizontal Discharge Rooftop Unit

Filter door shipped with
Rooftop unit

62M ERV Unit
Rainhoods for
optional economizer

Rooftop unit

Rooftop curb

Top View
Rooftop
Unit

Locator Pieces
(included with ERV curb,
must be watertight)

Accessory Transition

ERV Curb

62M170-285 ERV Unit

RETURN

ERV Wheel

30”

SUPPLY

Rooftop
ROOF CURB LOCATION
Unit curb
Locator Pieces ( included with ERV curb)
Cover panel provided

49 5/8"

DETAIL

ERV curb

A
45 1/2"

2 3/4"

ERV

38"

Top View

ROOFTOP UNIT
MODEL
48/50HJ,TF,TJ,TM

LEGEND
— Energy Recovery Ventilator

NOTE: When using a 62M ERV unit coupled with a Carrier
rooftop unit, the rooftop factory or field-installed economizer
cannot be used. Use the 62M economizer instead.

TRANSITION P/N

ERV CURB P/N

ROOFTOP
ECONOMIZER

004-007

62M-BTR-HJ36-D

62M-B-CRB-14MC

62MA-900---004

DIMENSIONS (in.)
A
B
673/8
373/16

008,009

62M-BTR-HJ78-D

62M-B-CRB-14MC

62MA-900---005

781/4

012,014

62M-BTR-HJ1012-D

62M-B-CRB-14MC

62MA-900---006

781/4

ROOFTOP SIZE

Fig. 26 — 62MD,ME170-285 Coupled with Carrier 48/50HJ,TF,TJ,TM004-014 Vertical Discharge Rooftop Unit

Filter door shipped
with Rooftop unit.
Rooftop Unit

Optional
Horizontal
Economizer

Top View
Rooftop
Unit

Horizontal
Return duct
(field supplied)
Accessory Transition

62M ERV Unit

Locator
pieces
(included with
ERV curb,
must be watertight)

ERV Curb

62M170-285 ERV Unit

ERV Wheel

30"

Rooftop
Unit curb

ROOF CURB LOCATION DETAIL

Locator Pieces ( included with ERV Curb)
Cover Panel provided

49 5/8"

ERV curb

A
45 1/2"

2 3/4"

ERV
38"

Top View

ROOFTOP UNIT
MODEL
48/50HJ,TF,TJ,TM

LEGEND
— Energy Recovery Ventilator

NOTE: When using a 62M ERV unit coupled with a Carrier
rooftop unit, the rooftop factory or field-installed economizer
cannot be used. Use the 62M economizer instead.

TRANSITION P/N

ERV CURB P/N

ROOFTOP
ECONOMIZER

004-007

62M-BTR-HJ36-H

62M-B-CRB-14MC

62MA-900---008

DIMENSIONS (in.)
A
B
673/8
373/16

008,009

62M-BTR-HJ78-H

62M-B-CRB-14MC

62MA-900---009

781/4

012,014

62M-BTR-HJ1012-H

62M-B-CRB-14MC

62MA-900---010

781/4

ROOFTOP SIZE

Fig. 27 — 62MD,ME170-285 Coupled with Carrier 48/50HJ,TF,TJ,TM004-014 Horizontal Discharge Rooftop Unit

Rooftop Unit

Accessory Transition

62M ERV unit

ERV

LEGEND
— Energy Recovery Ventilator

NOTES:
1. The 62M ERV unit cannot be coupled with
horizontal return 48/50TJ,TM016-028 and
48/50HJ015,017 units.
2. The ERV unit can be used with a factoryinstalled economizer, if desired.

Unit curb
ERV curb

TOP VIEW

SIDE VIEW

Rooftop Unit
Accessory
Transition

15 to 25 Ton Rooftop Unit

62M170-285
ERV Unit

ERV Wheel

*Optional
Economizer

Transition

ROOF CURB LOCATION DETAIL
Rooftop Unit Curb

SUPPLY

74 1/4"

RETURN

ERV Curb

45 1/2"
Rooftop
Unit
Curb

18 11/16"

44 3/4"

49 5/8"

44 3/4"

67 1/16"*

SIDE VIEW A-A

TOP VIEW
*Length is 891/16″ for 48/50TM028 units.

ROOFTOP UNIT
MODEL
48/50TJ,TM

ROOFTOP SIZE

48/50HJ

TRANSITION P/N

ERV CURB P/N

016-028

62M-BTR-HJ1525-D

62M-B-CRB-14S

015,017

62M-BTR-HJ1525-D

62M-B-CRB-14S

Fig. 28 — 62MD,ME170-285 Coupled with Carrier 48/50TJ,TM016-028
and 48/50HJ015,017 Vertical Discharge Rooftop Unit

ERV
Unit
Curb

Rooftop Unit

Rooftop Unit
Accessory Transition
(Includes front panel)

62M ERV Unit

Supply

Return
Accessory
Transition
Locator
pieces
(included with
ERV curb,
must be watertight)

ERV Wheel

ERV Curb

62M170-285 ERV Unit

ERV

LEGEND
— Energy Recovery Ventilator

NOTE: When using a 62M ERV unit coupled with a Carrier rooftop unit, the rooftop factory or field-installed economizer cannot
be used.

TOP VIEW

ROOF CURB LOCATION DETAIL
A

38 3/4"

ERV Curb
49 5/8"

Curb Detail

B
45 1/2"

Supply

Return

Rooftop
Unit
Curb

ERV
Unit
Curb

Side View A-A

Rooftop Unit Curb

38 3/4"

Locator pieces
(included with
ERV Curb)

ROOFTOP MODEL
48/50PG

03-07

62M-BTR-PG26-D

62M-A-CRB-14MC

DIMENSIONS (in.)
A
B
805/16
4411/16

08-14

62M-BTR-PG712-D

62M-A-CRB-14MC

923/4

ROOFTOP SIZE

62M TRANSITION

ERV CURB

5315/16

Fig. 29 — 62MD,ME170-285 Coupled with Carrier 48/50PG03-14 Vertical Discharge Rooftop Unit

Rooftop Unit

Rooftop Unit
Accessory Transition
(Includes front panel)

62M ERV Unit

Accessory Transition
Locator
pieces
(included with
ERV curb,
ERV Curb
must be watertight)
LEGEND
ERV — Energy Recovery Ventilator

ERV Wheel
62M170-285 ERV Unit

NOTE: When using a 62M ERV unit coupled with a Carrier
rooftop unit, the rooftop factory or field-installed economizer
cannot be used.

TOP VIEW

ROOF CURB LOCATION DETAIL
A

38 3/4"

ERV Curb
49 5/8"

Curb Detail

B
45 1/2"

Rooftop
Unit
Curb

ERV
Unit
Curb

Side View A-A

Rooftop Unit Curb

38 3/4"

Locator pieces
(included with
ERV Curb)

ROOFTOP MODEL
48/50PG

62M TRANSITION

ERV CURB

03-07

62M-BTR-PG26-H

62M-B-CRB-14MC

DIMENSIONS (in.)
A
B
805/16
4411/16

08-14

62M-BTR-PG712-H

62M-B-CRB-14MC

923/4

ROOFTOP SIZE

5315/16

Fig. 30 — 62MD,ME170-285 Coupled with Carrier 48/50PG03-14 Horizontal Discharge Rooftop Unit

Rooftop Unit

Outside Air Hood (See Note 2)

62M ERV Unit

Rooftop Unit
Curb
Horizontal / Return Duct
(field supplied)
Accessory
Transition

Rooftop Unit
Accessory
Transition

ERV Curb

ERV Wheel

62M170-285 ERV Unit

O/A Hood

LEGEND
ERV — Energy Recovery Ventilator
O/A — Outdoor Air
NOTES:
1. The ERV unit can be used with a factoryinstalled economizer, if desired.
2. Transition includes a new outside air hood,
which allows air intake through the front of the
hood rather than the bottom. The new hood will
use the filters from the original rooftop unit
hood.

Relief Hood

Top View

ROOF CURB LOCATION DETAIL
Rooftop Unit Curb
ERV Curb

44 3/4”

49 5/8”

Curb Detail

45 1/2”

Rooftop
Unit
Curb

44 3/4"

ERV
Unit
Curb

Side View A-A

Top View

48/50PG

20-28

62M-BTR-HG1525-H

62M-B-CRB-14MC

DIMENSIONS (in.)
A
B
114.4
78.6

48/50HJ

020-028

62M-BTR-HG1525-H

62M-B-CRB-14MC

114.4

ROOFTOP MODEL

ROOFTOP SIZE

62M TRANSITION

ERV CURB

Fig. 31 — 62MD,ME170-285 Coupled with Carrier 48/50PG20-28
and 48/50HJ020-028 Horizontal Discharge Rooftop Unit

78.6

Rooftop Unit
Outside Air Hood (See
Note 2)

62M ERV Unit

Standard HVAC Unit
Roofcurb
Accessory
Transition

Rooftop Unit

ERV Curb

Accessory
Transition

ERV
O/A

ERV Wheel

RETURN

SUPPLY

62M170-285 ERV Unit

O/A Hood

Top View

LEGEND
— Energy Recovery Ventilator
— Outdoor Air

NOTES:
1. The ERV unit can be used with a factoryinstalled economizer, if desired.
2. Transition includes a new outside air hood,
which allows air intake through the front of
the hood rather than the bottom. The new
hood will use the filters from the original
rooftop unit hood.

Relief Hood

ROOF CURB LOCATION DETAIL
Rooftop Unit Curb
44 3/4”

SUPPLY

RETURN

49 5/8”

Curb Detail

45 1/2”

Rooftop
Unit
Curb

44 3/4"

ERV
Unit
Curb

Side View A-A

ERV Curb

Top View

48/50PG

20-28

62M-BTR-HG1525-D

62M-B-CRB-14MC

DIMENSIONS (in.)
A
B
114.4
78.6

48/50HJ

020-028

62M-BTR-HG1525-D

62M-B-CRB-14MC

114.4

ROOFTOP MODEL

ROOFTOP SIZE

62M TRANSITION

ERV CURB

Fig. 32 — 62MD,ME170-285 Coupled with Carrier 48/50PG20-28
and 48/50HJ020-028 Vertical Discharge Rooftop Unit

78.6

Filter access door
shipped with
transition

62M ERV Unit

Rooftop Unit

Outside air hood
for optional
economizer

Accessory
Transition

Top View
Rooftop Unit

ERV Curb
Accessory
Transition
62M330-640 ERV Unit

ERV Wheel

Return

Supply

ERV
O/A

O/A hood

Outside air hood
for optional
economizer

Rooftop Unit curb

LEGEND
— Energy Recovery Ventilator
— Outdoor Air

NOTE: When using a 62M ERV unit coupled with a
Carrier rooftop unit, the rooftop factory or fieldinstalled economizer cannot be used. Use the 62M
economizer instead.

Exhaust hood

ROOF CURB LOCATION DETAIL

ERV curb

78 1/4"
A

Return

Supply

55 13/32"

33 1/2"

ERV
Unit
Curb

Side View A-A

9"
50"

Rooftop
Unit
Curb

33 1/2"

60 11/32"

Top View
ROOFTOP UNIT MODEL
48/50HJ,TF,TJ,TM

ROOFTOP SIZE
012,014

TRANSITION P/N
62M-CTR-HJ1012-D

ERV CURB P/N
62M-C-CRB-14M

ROOFTOP ECONOMIZER
62MA-900---006

Fig. 33 — 62MD,ME330-640 Coupled with Carrier 48/50HJ,TF,TJ,TM012,014 Vertical Discharge Rooftop Unit

Filter access door
shipped with
transition

Rooftop Unit

62M ERV Unit

ERV
O/A
R/A
S/A

—
—
—
—

LEGEND
Energy Recovery Ventilator
Outdoor Air
Return Air
Supply Air

Horizontal
supply duct
(field supplied)

NOTE: When using a 62M ERV unit coupled with a Carrier rooftop unit, the rooftop
factory or field-installed economizer cannot
be used. Use the 62M economizer instead.

Horizontal
return (field
supplied)

Accessory
Transition
ERV Curb

Top View

Rooftop Unit

Accessory
Transitions

Top View
with Economizer
Accessory
62M 330-640 ERV Unit
Transitions

62M330-640
ERV Unit

ERV Wheel

10 to 12 1/2 Ton
Rooftop Unit

O/A hood
S/A
Duct

S/A
R/A

R/A
Duct

Exhaust hood

Rooftop Unit curb

Optional
Horizontal
Economizer Exhaust hood

ROOF CURB LOCATION DETAIL

ERV Curb

78 1/4"
A

55 13/32"

Rooftop
Unit
Curb

ERV
Unit
Curb

33 1/2"

Side View A-A
9"
60 11/32"
50"

33 1/2"

Top View

ROOFTOP UNIT MODEL
48/50HJ,TF,TJ,TM Without Economizer

ROOFTOP SIZE
012,014

TRANSITION P/N
62M-CTR-HJ1012-H

ERV CURB P/N
62M-C-CRB-14M

ROOFTOP ECONOMIZER
—

48/50HJ,TF,TJ,TM With Economizer

012,014

62M-CTR-HJ1012-HEC

62M-C-CRB-14M

62MA-900---010

Fig. 34 — 62MD,ME330-640 Coupled with Carrier 48/50HJ,TF,TJ,TM012,014 Horizontal Discharge Rooftop Unit

Rooftop Unit

ERV
O/A

62M ERV Unit

LEGEND
— Energy Recovery Ventilator
— Outdoor Air

NOTES:
1. The ERV unit can be used with a factoryinstalled economizer, if desired.
2. The ERV cannot be coupled with a horizontal return 48/50TJ,TM or HJ 15 to
25 ton rooftop unit.

Rooftop Unit Curb
Accessory
Transition

Accessory
Transition

RETURN

SUPPLY

62M330-640
ERV Unit

ERV Wheel

Rooftop Unit

ERV curb
TJ/HJ 15 to 25 Ton
Rooftop Unit
Accessory
Transition

62M ERV Unit

Optional
Economizer
O/A hood

Exhaust hood

Side View

Top View

Rooftop Unit Curb

ROOF CURB LOCATION DETAIL

ERV curb

RETURN AIR

SUPPLY AIR

74 1/4"

55 13/32"

Rooftop
Unit
Curb

53 3/4"

ERV
Unit
Curb

Side View A-A
11 1/2"
67 1/16"*

53 3/4"

60 11/32"

Top View
*Length is 891/16″ for 48/50TM028 units.
ROOFTOP UNIT
MODEL
48/50TJ,TM
48/50HJ

ROOFTOP SIZE

TRANSITION P/N

ERV CURB P/N

016-028

62M-BTR-HJ1525-D

62M-B-CRB-14S

015,017

62M-BTR-HJ1525-D

62M-B-CRB-14S

Fig. 35 — 62MD,ME330-640 Coupled with Carrier 48/50TJ,TM016-028 and 48/50HJ015,017
Vertical Discharge Rooftop Unit

Rooftop Unit

Rooftop 48/50PG Unit
Accessory Transition
(Includes front panel)

62M ERV Unit

Supply

Return

Accessory Transition

ERV Wheel
ERV Curb
62M330-640 ERV Unit

LEGEND
ERV — Energy Recovery Ventilator
NOTE: When using a 62M ERV unit coupled with a Carrier
rooftop unit, the rooftop factory or field-installed economizer
cannot be used.

TOP VIEW

ROOF CURB LOCATION DETAIL
A

38 3/4

"
ERV Curb
60 11/32"

Curb Detail
A

Supply

A
55 13/32"

Return

Rooftop Unit Curb

Rooftop
Unit
Curb

38 3/4"

ERV
Unit
Curb

Side View A-A

ROOFTOP UNIT
MODEL

ROOFTOP SIZE

62M TRANSITION

ERV CURB

48/50PG

08-14

62M-CTR-PG712-D

62M-C-CRB-14M

A
923/4

DIMENSIONS (in.)
B
5315/16

C
10

Fig. 36 — 62MD,ME330-640 Coupled with Carrier 48/50PG08-14 Vertical Discharge Rooftop Unit

Rooftop Unit

Rooftop Unit
Accessory Transition
(Includes front panel)

62M ERV Unit

Accessory Transition

ERV Wheel
ERV Curb

62M330-640 ERV Unit
ERV

LEGEND
— Energy Recovery Ventilator

NOTE: When using a 62M ERV unit coupled with a Carrier
rooftop unit, the rooftop factory or field-installed economizer
cannot be used.

TOP VIEW

ROOF CURB LOCATION DETAIL
38 3/4"

ERV Curb
60 11/32"

Curb Detail
B

A
55 13/32"
C

Rooftop
Unit
Curb

38 3/4"

ERV
Unit
Curb

Side View A-A
Rooftop Unit Curb

ROOFTOP UNIT
MODEL

ROOFTOP SIZE

62M TRANSITION

ERV CURB

48/50PG

08-14

62M-CTR-PG712-H

62M-C-CRB-14M

A
923/4

DIMENSIONS (in.)
B
5315/16

C
10

Fig. 37 — 62MD,ME330-640 Coupled with Carrier 48/50PG08-14 Horizontal Discharge Rooftop Unit

Rooftop Unit
Outside Air Hood (See
Note 2)

62M ERV Unit

Horizontal Return Duct
(Field Supplied)
Accessory
Transition
Rooftop Unit Curb

Rooftop Unit
Accessory
Transition

ERV Curb

ERV Wheel

62M330-640 ERV Unit

ERV
O/A

LEGEND
— Energy Recovery Ventilator
— Outdoor Air

O/A Hood

Relief Hood

Top View

ROOF CURB LOCATION DETAIL
Rooftop Unit Curb
44 3/4"

60 11/32"

Curb Detail

55 13/32"

Rooftop
Unit
Curb

44 3/4"

ERV
Unit
Curb

Side View A-A

ERV Curb

Top View

48/50PG

20-28

62M-CTR-HG1525-H

62M-C-CRB-14M

DIMENSIONS (in.)
A
B
114.4
78.6

48/50HJ

020-028

62M-CTR-HG1525-H

62M-B-CRB-14M

114.4

ROOFTOP MODEL

ROOFTOP SIZE

62M TRANSITION

ERV CURB

Fig. 38 — 62MD,ME330-640 Coupled with Carrier 48/50PG20-28
and 48/50HJ020-028 Horizontal Discharge Rooftop Unit

78.6

Rooftop Unit

Outside Air Hood (See
Note 2)

62M ERV Unit

Rooftop Unit Curb
Accessory
Transition

Rooftop Unit

ERV Curb
Accessory
Transition

ERV Wheel

RETURN

SUPPLY

62M330-640 ERV Unit

ERV
O/A

LEGEND
— Energy Recovery Ventilator
— Outdoor Air

O/A Hood

Top View
Relief Hood

ROOF CURB LOCATION DETAIL
Rooftop Unit Curb
44 3/4"

60 11/32"

RE TUR N

SUPPLY

Curb Detail

Rooftop
Unit
Curb

55 13/32"

ERV
Unit
Curb

44 3/4"

Side View A-A

ERV Curb

Top View

48/50PG

20-28

62M-CTR-HG1525-D

62M-C-CRB-14M

DIMENSIONS (in.)
A
B
114.4
78.6

48/50HJ

020-028

62M-CTR-HG1525-D

62M-B-CRB-14M

114.4

ROOFTOP MODEL

ROOFTOP SIZE

62M TRANSITION

ERV CURB

Fig. 39 — 62MD,ME330-640 Coupled with Carrier 48/50PG20-28
and 48/50HJ020-028 Vertical Discharge Rooftop Unit

78.6

TOP VIEW

ERV Wheel

62M ERV Unit

Return

Supply

Accessory
Transition

O/A hood

Exhaust hood
Rooftop Unit

ROOF CURB LAYOUT
60.34"
0"
Return

55.4"

LEGEND
— Energy Recovery Ventilator
— Outdoor Air

Supply

ERV
O/A

NOTES:
1. The ERV unit can be used with a factoryinstalled economizer, if desired.
2. ERV cannot be coupled to a horizontal return
rooftop unit.

58 3/4"

ERV Curb

Rooftop Unit Curb
77 3/4"

Outside air
hood

SIDE VIEW
Rooftop Unit

62M Unit

ERV Wheel

Economizer
See Note 1

ERV Curb

ROOFTOP UNIT MODEL
48/50A

Accessory
Transition

ROOFTOP SIZE
020-060

TRANSITION P/N
62M-CTR-AJ2060-D

Standard
Rooftop Unit Curb

ERV CURB P/N
62M-C-CRB-14M

Fig. 40 — 62MD,ME330-640 Coupled with Carrier 48/50A020-060 Vertical Discharge Rooftop Unit

Rooftop Unit
62M ERV Unit

Rooftop
Unit Curb

Accessory
Transition

Top View

Rooftop Unit
Accessory
Transition

ERV Wheel

RETURN

SUPPLY

ERV Curb
62M750,950 ERV Unit

O/A Hood
ERV
O/A

Exhaust Hood

LEGEND
— Energy Recovery Ventilator
— Outdoor Air

NOTES:
1. The standard factory economizer cannot be
used when coupled with 62M750,950 units.
Contact factory for transition with economizer.
2. 62M750,950 units cannot be used with
48/50TJ and TM016-028 horizontal discharge
rooftop units.

ROOF CURB LOCATION DETAIL
Rooftop Unit Curb
ERV Curb

RETURN AIR

SUPPLY AIR

74 1/4"

86.25"

Rooftop
Unit
Curb

31 9/16"

ERV
Unit
Curb

Side View A-A
95.7"

31 9/16"

67.1"*

Top View
*Length is 891/16″ for
48/50TM028 units.

ROOFTOP UNIT MODEL
48/50TJ,TM

ROOFTOP SIZE
016-028

TRANSITION P/N
62M-DTR-HJ1525-D

ERV CURB P/N
62M-D-CRB-14M

ROOFTOP ECONOMIZER
62MA-900---007

48/50HJ

015,017

62M-DTR-HJ1525-D

62M-D-CRB-14M

62MA-900---007

Fig. 41 — 62MD,ME750,950 Coupled with Carrier 48/50TJ,TM016-028
and 48/50HJ015,017 Vertical Discharge Rooftop Unit

Rooftop Unit

62M ERV Unit

Accessory
Transition
Accessory
Transition

62M750,950 ERV

ERV Curb

ERV Wheel

Rooftop Unit

O/A Hood

ERV
O/A

LEGEND
— Energy Recovery Ventilator
— Outdoor Air

NOTE: The ERV unit can be used with a factoryinstalled economizer, if desired.

Top View

Relief Hood

ROOF CURB LOCATION DETAIL

ERV Curb
Curb Detail

86 1/4"

44 3/4”

Rooftop
Unit
Curb

44 3/4"

ERV
Unit
Curb

Side View A-A

95 3/4"

Top View

48/50PG

20-28

62M-DTR-HG1525-H

62M-D-CRB-14M

DIMENSIONS (in.)
A
B
114.4
78.6

48/50HJ

020-028

62M-DTR-HG1525-H

62M-D-CRB-14M

114.4

ROOFTOP MODEL

ROOFTOP SIZE

62M TRANSITION

ERV CURB

Fig. 42 — 62MD,ME750,950 Coupled with Carrier 48/50PG20-28
and 48/50HJ020-028 Vertical Discharge Rooftop Unit

78.6

Rooftop Unit
62M ERV Unit

Rooftop Unit Curb

Accessory
Transition
Rooftop Unit
62M750,950 ERV
ERV Curb
ERV Wheel

RETURN

SUPPLY

Accessory
Transition

O/A Hood

ERV
O/A

LEGEND
— Energy Recovery Ventilator
— Outdoor Air

NOTE: The ERV unit can be used with a
factory-installed economizer, if desired.

Top View
Relief Hood

ROOF CURB LOCATION DETAIL
Rooftop Unit Curb
ERV Curb

RETURN

SUPPLY

Curb Detail

44 3/4”

86 1/4"

Rooftop
Unit
Curb

95 3/4"

44 3/4"

ERV
Unit
Curb

Side View A-A

Top View

48/50PG

20-28

62M-DTR-HG1525-D

62M-D-CRB-14M

DIMENSIONS (in.)
A
B
114.4
78.6

48/50HJ

020-028

62M-DTR-HG1525-D

62M-D-CRB-14M

114.4

ROOFTOP MODEL

ROOFTOP SIZE

62M TRANSITION

ERV CURB

Fig. 43 — 62MD,ME750,950 Coupled with Carrier 48/50PG20-28
and 48/50HJ020-028 Vertical Discharge Rooftop Unit

78.6

Rooftop Unit
62M ERV Unit

Accessory
Transition

Unit curb

ERV Curb
62M750,950 ERV Unit

Accessory
Transition

Rooftop Unit

ERV Wheel

O/A Hood

RETURN AIR

SUPPLY AIR

ERV
O/A

LEGEND
— Energy Recovery Ventilator
— Outdoor Air

NOTES:
1. The standard factory economizer can be used in
conjunction with 62M750,950 units.
2. 62M750,950 units cannot be used with horizontal
discharge rooftop units.

Exhaust Hood

ROOF CURB LOCATION DETAIL

Rooftop Unit Curb

ERV Curb

RETURN AIR

SUPPLY AIR

CURB DETAIL

86.25"

Rooftop
Unit
Curb

57 9/16"

Side View A-A
57 9/16"
(See curb
detail)
77 3/4"

95.7"

Top View

ROOFTOP UNIT MODEL
48/50A

ROOFTOP SIZE
020-060

TRANSITION P/N
62M-DTR-AJ2060-D

ERV CURB P/N
62M-D-CRB-14M

Fig. 44 — 62MD,ME750,950 Coupled with Carrier 48/50A020-060 Rooftop Unit

ERV
Unit
Curb

Exhaust hood
(outdoor units only)
2 in. pre-filters for
exhaust
Exhaust
Blower

Top View
Horizontal Discharge Stand-Alone Unit

Outside air hood
(outdoor units only)
Optional
Pre-heater

2 in. pre-filters for
outside air

ERV Wheel

Exhaust hood
(outdoor units only)

Top View
Down Discharge Stand-Alone Unit

Optional
Pre-heater

Outside air
rainhood

2 in. pre-filters
exhaust
Return/exhaust
opening in base

Optional
Pre-heater

Outside air blower,
mounted over supply
opening in base

2 in. pre-filters
outside air

ERV wheel
Hinged and latched
access door (both sides)
Supply air
blower

Side View
Down Discharge Stand-Alone Unit

Optional ERV
roof curb

Supply air
blower

Exhaust
blower

Outside air intake hood
(outside units only)
2 in. pre-filters
outside air

ERV wheel

Supply duct for
outside air (field
provided)

Fig. 45 — 62M Airflow in Stand-Alone Applications

Step 3 — Rigging and Handling — To transfer the
unit from the shipping platform to the storage or installation
site, refer to the rigging label on the unit and these instructions.

All panels must be secured in place prior to lifting the ERV
unit in to place. Follow all local and other applicable codes
when lifting, locating and mounting the ERV unit. Damage
to unit may result.

All panels must be in place when rigging. Unit is not
designed for handling by fork truck. Damage to unit may
result.

Locate the ERV Unit — Prior to locating the indoor ERV unit
consider the intake and exhaust duct accessibility to outside
walls or roof vents. When locating the ERV unit consider
required service clearances.
See Table 1 for unit weights to determine if building structure reinforcements are required.
Determine a Method for Mounting — The method for mounting and securing the ERV unit to the building structure must be
field designed and installed. Mounting methods will vary
depending upon specific jobsite conditions.
NOTE: Hardware and pieces to secure ERV unit to the building structure must not interfere with the service clearances or
duct requirements for the unit.
Lift the ERV Unit in Place — Secure the ERV unit to the
building structure following all applicable local building codes.

Refer to Table 1 for ERV unit weights. Check lifting devices
for capacity constraints.
Hook rigging shackles through the holes or lifting eyes in
the ERV unit.
NOTE: Some 62M units have lifting eyes, some 62M units
have holes in the ERV base rail. See Fig. 46.
Connect lifting straps and spreader bars. See Fig. 46.
Spreader bars must be positioned to prevent cables from
rubbing against the ERV unit.
Carefully lift the ERV unit and set on ERV roof curb. Do
not drop the ERV unit onto the roof curb, as damage may
occur. Avoid twisting or uneven lifting of the unit. Never lift
the unit by the hoods or any means other than the provided
lifting holes or eyes.
MOUNTING THE ERV UNIT INDOORS — The ERV unit
can be mounted indoors. Follow all local and other applicable
building codes.

Do not use the ERV duct system to support the ERV unit in
any way. Follow all local and applicable building codes
and manufacture and install the ductwork to the ERV unit
per the duct opening connections. Equipment damage or
personal injury may result.

Spreader Bars

RIGGING FOR ERV INSTALLATION

RIGGING HOLES ERV BASE RAIL

RIGGING LIFTING EYES

Fig. 46 — Rigging Details

Table 1 — Physical Data
UNIT 62M
NOMINAL CAPACITY (cfm)
CAPACITY RANGE (cfm)
MAXIMUM SHIPPING WEIGHT (lb)
Single-Wall Models
Double-Wall Models
MAXIMUM OPERATING WEIGHT (lb)
Single-Wall Models
Double-Wall Models
62MB,MC INDOOR UNIT DIMENSIONS (in.)
Length*
Width
Height
62MD,ME OUTDOOR UNIT DIMENSIONS (in.)†
Length*
Width
Height
ROTARY ENERGY EXCHANGER
Type
Size (Diam. x Depth) (in.)
Nominal Drive Motor Hp
SUPPLY/EXHAUST AIR FAN
Qty…Type
Drive Type
Fan Isolation
Wheel Dimensions (Diam. x Width)
Nominal Motor Hp
FILTERS (optional)
Type
Exhaust Air...Qty...Size (L x W x D) (in.)
Outside Air...Qty...Size (L x W x D) (in.)

UNIT 62M
NOMINAL CAPACITY (cfm)
CAPACITY RANGE (cfm)
MAXIMUM SHIPPING WEIGHT (lb)
Single-Wall Models
Double-Wall Models
MAXIMUM OPERATING WEIGHT (lb)
Single-Wall Models
Double-Wall Models
62MB,MC INDOOR UNIT DIMENSIONS (in.)
Length
Width
Height
62MD,ME OUTDOOR UNIT DIMENSIONS (in.)†
Length
Width
Height
ROTARY ENERGY EXCHANGER
Type
Size (Diam. x Depth) (in.)
Nominal Drive Motor Hp
SUPPLY/EXHAUST AIR FAN
Qty…Type
Drive Type
Fan Isolation
Wheel Dimensions (Diam. x Width)
Nominal Motor Hp
FILTERS (optional)
Type
Exhaust Air...Qty...Size (L x W x D) (in.)
Outside Air...Qty...Size (L x W x D) (in.)

040
400
100-550

075
750
500-1000

120
1200
1000-1400

170
1700
1400-2000

225
2250
2000-2500

285
2850
2500-3200

255
367

440
635

462
657

850
1135

900
1185

1000
1285

235
347

400
595

422
617

790
1075

840
1125

940
1225

29.75
29.88
29.75

43.25
39.13
37.88

62.63
58.38
48.88

48.43
31.24
29.72

60.75
50.13
37.88

60.75
55.13
37.88

87.13
69.38
48.88

22.5 x 2
N/A

Enthalpy Lightweight Polymer with Silica Gel Desiccant Coating
29.0 x 2
29.0 x 3
40.0 x 1.5
40.0 x 1.5
1/
1/
N/A
N/A
6
6

Direct

2….Forward Curved Centrifugal
Adjustable Belt Drive
Neoprene Pads
9x7
12 x 12
1
1

5.5 x 5.5
1/
4

9x7
1/
2

1….12 x 20 x 2
1….12 x 20 x 2

1….18 x 25 x 2
1….18 x 25 x 2

330
3300
3000-3600

430
4300
3600-5000

550
5500
5000-6000

1300
1710

1350
1760

1220
1630

40.0 x 3
1/
6

12 x 12
2

2….20 x 25 x 2
2….20 x 25 x 2

640
6400
6000-6800

750
7500
6500-8500

950
9500
8500-10,500

1440
1850

1590
2000

2650
3270

2750
3370

1270
1680

1360
1770

1510
1920

2550
3170

2650
3270

73.13
67.89
65.21

108.3
97.87
77.4

100.88
87.89
65.21

143.45
121.87
77.4

56.2 x 1.5
1/
2

Enthalpy Lightweight Polymer with Silica Gel Desiccant Coating
56.2 x 1.5
56.2 x 3
56.2 x 3
68.0 x 3
1/
1/
1/
1/ **
2
2
2
4

68.0 x 3
1/ **
4

15 x 15
2

15 x 15
3

2...Forward Curved Centrifugal
Adjustable Belt Drive
Neoprene Pads
15 x 15
15 x 15
5
71/2

18 x 18
71/2

18 x 18
10

6….16 x 20 x 2
6….16 x 20 x 2

2-in. Pleated — 30% Efficiency
6….16 x 20 x 2
6….16 x 20 x 2
6….16 x 20 x 2
6….16 x 20 x 2

6….20 x 24 x 2
6….20 x 24 x 2

LEGEND
N/A — Not Applicable
*Add 10 in. to 62M040 units equipped with a preheater.
†Dimensions include outdoor air hoods.
**575-v motors are 1/3 hp.

2-in. Pleated — 30% Efficiency
1….18 x 25 x 2
2….20 x 25 x 2
1….18 x 25 x 2
2….20 x 25 x 2

Step 4 — Installing ERV Transitions — When coupling ERV units with Carrier rooftop units an ERV transition is
required to link the ERV unit and the Carrier rooftop unit
together.
ERV UNIT COUPLED WITH A 3 to 121/2 TON HVAC
UNIT — Complete the following steps to install a transition to
a 3 to 121/2 ton rooftop unit.
1. Remove the HVAC unit filter door and set aside for later
use.
2. Remove the panel shipped on the HVAC unit covering
the return air chamber. This panel can be discarded.
3. The 62M ERV transition for 3 to 121/2 ton rooftop units
includes a replacement panel to cover the return opening.
Install the replacement panel, with hood scoop attached,
onto the HVAC unit, over the return air chamber. Screw
in place. The return/exhaust scoop will cover part of the
return air opening in the HVAC unit.
NOTE: The standard transition does not seal tight around the
return air opening on the HVAC unit. This allows for some air
to flow back to the HVAC unit and some to be drawn back
through the ERV unit.
4. Slide the transition between the ERV unit and the HVAC
unit. Refer to Fig. 17-44 to orient the transition. Line up
the transition so that it covers the openings in the HVAC
unit and the ERV unit. The divider in the transition must
separate the supply and return openings in the ERV unit.
Screw the mating flanges of the transition to the ERV unit
through pre-punched holes. Caulk the seams watertight.
Screw the mating flanges on the other side of the transition to the new return air cover panel on the HVAC unit.
Caulk seams watertight.
5. On most models the filter access door shipped with the
HVAC unit will be reinstalled above the transition.
6. The transition includes a balancing damper to allow for
the desired separation of the return/exhaust air between
the ERV and HVAC units. This damper has a manual
adjustment. During balancing, this damper will be
adjusted to achieve desired exhaust cfm. The balancing
damper can be accessed through a separate door in the
transition or through the HVAC unit’s filter access door.
See Fig. 17-44.

IMPORTANT: Only trained, qualified installers and
service technicians should install, wire, start-up and
service equipment.
POWER SUPPLY — The electrical characteristics of the
available power supply must agree with the unit nameplate
rating. Supply voltage must be within the limits shown. See
Tables 2 and 3 for electrical and configuration data.
ELECTRICAL CONNECTIONS — The ERV unit must
have its own electrical disconnect box. If the disconnect option
has not been ordered from the factory, it must be field supplied
and installed per local codes. See Tables 2 and 3.
If the ERV unit has an electric pre-heater factory installed, it
will be wired through the ERV unit disconnect.
NOTE: Most ERV units have electrical interlock safety
switches on the access doors, which will not allow the ERV
unit to operate if either of the access doors are opened.
Low Voltage Wiring — Wire low voltage per diagrams. For
coupled applications, there will be a brown and black wire in
the exhaust chamber, which must be tied into the HVAC unit’s
indoor fan so that when the indoor fan is activated, the ERV
unit will be activated.
48/50TJ, HJ 3 to 121/2 Ton Rooftop Units with Economizers
— The brown and black wires can be plugged into the economizer jumper plug on the HVAC unit’s economizer harness.
Insert the brown wire from the ERV unit into terminal 4 in the
jumper plug and insert the black wire from the ERV unit into
terminal 3 in the jumper plug. See Fig. 47.
If the 3 to 121/2 ton rooftop unit has an economizer installed, the economizer will have an end switch attached to the
economizer actuator. The end switch must be wired into the
ERV unit as shown in Fig. 48.
For ERV units coupled with units with factory-installed
economizers, (48/50TM, HJ 15 to 25 ton units 48/50HG, PG 15
to 25 ton units) the ERV transitions to these rooftop units include an economizer end switch. This switch mounts to the hub
of the economizer damper gear as shown in Fig. 49. Set the end
switch so that the ERV unit’s outside air blower is deactivated
during economizer mode.
For stand-alone units, the ERV unit is jumpered from terminals 6 and 8 and 7 and 9, providing for continuous operation.
The ERV unit should be connected to an on-off device such as
a CO2 sensor.
High Voltage Wiring (Fig. 50-53) — Connect high voltage
wiring to the disconnect per Fig. 50, 52 and 53. Check blower
rotation direction and adjust if necessary.

Step 5 — Make Electrical Connections

Prior to performing service or maintenance operations on
the ERV unit, turn off and disconnect all power switches to
the unit. Be aware that there may be more than one disconnect switch. Electrical shock could cause serious personal
injury or death.

Table 2 — Electrical Data Without VAV Option
UNIT SIZE
62M

EXHAUST AND SUPPLY MOTOR

VOLTAGE
(V-Ph-Hz)

ERV WHEEL
FLA

115-1-60

0.7

3.96

0.3

1.74†

0.7

9.8

NEC - FLA

230-1-60
040

208/230-3-60

460-3-60
575-3-60
115-1-60

230-1-60

075

4.9

208/230-3-60

2.2

0.5

0.3
460-3-60

1.1

575-3-60

0.9

115-1-60

0.7

230-1-60

120

208/230-3-60

4.2

0.3
460-3-60

2.1

575-3-60

1.7

230-1-60

208/230-3-60

4.2

170

ERV
FLA
Hp
MCA
MOCP
NEC
N/A

0.6

—
—
—
—
—
—
—

460-3-60

2.1

575-3-60

1.7

LEGEND
Energy Recovery Ventilator
Full Load Amps
Horsepower
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electric Code
Not Applicable

*Fused disconnect only.
†Exhaust and supply fan motors are 230-1-60.

POWER SUPPLY

HEATER
SIZE
(kW)

FLA

MCA

MOCP

PRE-HEATER
(Optional)
FLA

—
2
—
2
—
2
—
2
—
2
—
2
5
—
2
5
—
2
5
—
2
5
—
2
5
—
2
5
—
2
5
—
5
8
—
2
5
—
2
5
—
5
8
10
—
5
8
10
—
5
8
10
—
5
8
10

9.27
26.64
4.44
13.76
4.11
9.66
2.34
4.85
1.87
3.75
20.69
38.08
64.17
10.46
19.16
32.2
5.03
10.05
17.59
2.53
5.04
8.81
2.10
4.11
7.13
33.09
50.48
76.57
16.66
25.36
38.40
9.03
14.05
21.59
4.53
7.04
10.81
3.70
5.71
8.73
16.93
38.67
51.71
60.41
9.33
21.90
29.44
34.46
4.69
10.97
14.74
17.26
3.88
8.90
11.92
13.93

9.90
31.64
4.35
16.37
4.35
11.30
2.72
5.86
2.17
4.18
24.5
46.24
78.85
12.25
23.12
39.42
5.50
11.78
21.21
2.75
5.89
10.60
2.25
4.76
8.53
40.00
61.74
94.35
20.00
30.87
47.17
10.50
16.78
26.21
5.25
8.39
13.10
4.25
6.76
10.53
20.00
47.17
63.48
74.35
10.50
26.21
35.63
41.91
5.25
13.10
17.82
20.96
4.25
10.53
14.30
16.82

12.87
31.64
5.66
16.37
5.66
11.30
4.89
7.40
3.91
6.90
31.85
49.24
78.85
15.93
24.62
39.42
7.15
12.18
21.21
3.58
6.09
10.60
2.93
4.94
8.53
52.00
69.39
95.48
26.00
34.70
47.74
13.65
18.68
26.22
6.83
9.34
13.11
5.53
7.54
10.55
26.00
47.74
63.48
74.35
13.65
26.22
35.63
41.91
6.83
13.11
17.82
20.96
5.53
10.55
14.30
16.82

—
17.39
—
8.7
—
5.03
—
2.51
—
2.01
—
17.39
43.48
—
8.7
21.74
—
5.03
12.57
—
2.51
6.28
—
2.01
5.03
—
17.39
43.48
—
8.70
21.74
—
5.03
12.57
—
2.51
6.28
—
2.01
5.03
—
21.74
34.78
43.48
—
12.57
20.11
25.13
—
6.28
10.05
12.57
—
5.03
8.04
10.05

DISCONNECT
(Optional)
Fuse Size*
Amps
Amps
30
12
40
30
5
15
5
10
30
3
5
2
4
40
30
60
45
100
70
15
30
20
60
35
6
12
20
4
6
30
10
3
5
8
60
50
80
60
200
90
30
25
40
30
60
45
30
12
30
18
40
25
6
8
12
30
5
6
10
30
25
60
45
80
60
100
70
30
12
40
25
60
35
60
40
30
6
30
12
30
18
30
20
30
5
30
10
30
12
30
15

Table 2 — Electrical Data Without VAV Option (cont)
UNIT SIZE
62M

VOLTAGE
(V-Ph-Hz)

ERV WHEEL
FLA

208/230-3-60

225

460-3-60

EXHAUST AND SUPPLY MOTOR
NEC - FLA

6.8

0.6

575-3-60

3.4

2.7
2

208/230-3-60

285

460-3-60

6.8

0.6

575-3-60

2.7

208/230-3-60

330

460-3-60

6.8

1.2

575-3-60

460-3-60

1.2

575-3-60

4.8

3.9

208/230-3-60

460-3-60

9.6

575-3-60

550

3.4

2.7

208/230-3-60

430

3.4

15.2

1.2

7.6

6.1

HEATER
SIZE
(kW)

FLA

DISCONNECT
PRE-HEATER
(Optional)
(Optional)
Size*
FLA
Amps Fuse
MCA MOCP
Amps

—
5
8
10
—
5
8
10
—
5
8
10
—
5
8
10
—
5
8
10
—
5
8
10
—
8
10
15
—
8
10
15
—
8
10
15
—
8
10
15
—
8
10
15
—
8
10
15
—
8
10
15
—
8
10
15
—
8
10
15

14.53
27.10
34.64
39.66
7.29
13.57
17.34
19.86
5.88
10.90
13.92
15.93
14.53
27.10
34.64
39.66
7.29
13.57
17.34
19.86
5.88
10.90
13.92
15.93
15.13
35.24
40.26
52.83
7.62
17.67
20.18
26.46
6.05
14.09
16.10
21.13
20.73
40.84
45.86
58.43
10.42
20.47
22.98
29.26
8.45
16.49
18.50
23.53
31.93
52.04
57.06
69.63
16.02
26.07
28.58
34.86
12.85
20.89
22.90
27.93

17.00
32.71
42.13
48.41
8.50
16.35
21.07
24.21
6.75
13.03
16.80
19.32
17.00
32.71
42.13
48.41
8.50
16.35
21.07
24.21
6.75
13.03
16.80
19.32
18.50
43.63
49.91
65.62
10.00
22.57
25.71
33.56
8.25
18.30
20.82
27.10
25.50
50.63
56.91
72.62
13.50
26.07
29.21
37.06
11.25
21.30
23.82
30.10
39.50
64.63
70.91
86.62
20.50
33.07
36.21
44.06
16.75
26.80
29.32
35.60

POWER SUPPLY

22.10
34.67
42.21
48.41
11.05
17.33
21.10
24.21
8.78
13.80
16.82
19.32
22.10
34.67
42.21
48.41
11.05
17.33
21.10
24.21
8.78
13.80
16.82
19.32
23.30
43.63
49.91
65.62
12.25
22.57
25.71
33.56
9.98
18.30
20.82
27.10
32.40
52.51
57.53
72.62
16.80
26.85
29.37
37.06
13.88
21.92
23.93
30.10
50.60
70.71
75.73
88.30
25.90
35.95
38.47
44.75
21.03
29.07
31.08
36.10

—
12.57
20.11
25.13
—
6.28
10.05
12.57
—
5.03
8.04
10.05
—
12.57
20.11
25.13
—
6.28
10.05
12.57
—
5.03
8.04
10.05
—
20.11
25.13
37.70
—
10.05
12.57
18.85
—
8.04
10.05
15.08
—
20.11
25.13
37.70
—
10.05
12.57
18.85
—
8.04
10.05
15.08
—
20.11
25.13
37.70
—
10.05
12.57
18.85
—
8.04
10.05
15.08

30
40
60
60
30
30
30
30
30
30
30
30
30
40
60
60

20
30
40
45
10
15
20
20
8
12
15
18
20
30
40
45
10
15
20

30
60
80
30
40
30
40

8
12
15
18
20
40
45
60
12
20
25
30
8
18
20
25
30

100
30

70
15

35
12

30
40
60

20
30
50

100

200
30

80
25

60
30
40
40
60

35
40
20
25
30
35

Table 2 — Electrical Data Without VAV Option (cont)
UNIT SIZE
62M

VOLTAGE
(V-Ph-Hz)

ERV WHEEL
FLA

EXHAUST AND SUPPLY MOTOR

208/230-3-60

640

460-3-60

NEC - FLA

1.2

575-3-60

9
7.5

208/230-3-60

750

950

ERV
FLA
Hp
MCA
MOCP
NEC
N/A

—
—
—
—
—
—
—

2.5

460-3-60

1.2

575-3-60

1.4

208/230-3-60

2.5

30.8

460-3-60

1.2

575-3-60

1.4

LEGEND
Energy Recovery Ventilator
Full Load Amps
Horsepower
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electric Code
Not Applicable

*Fused disconnect only.
†Exhaust and supply fan motors are 230-1-60.

DISCONNECT
PRE-HEATER
(Optional)
(Optional)
Size†
FLA
Amps Fuse
MOCP
Amps

POWER SUPPLY

HEATER
SIZE
(kW)

FLA

MCA

—
8
10
15
—
8
10
15
—
8
10
15
—
10
15
20
—
10
15
20
—
10
15
20
—
10
15
20
—
10
15
20
—
10
15
20

45.53
65.64
70.66
83.23
22.82
32.87
35.38
41.66
18.65
26.69
28.70
33.73
46.83
71.96
84.53
97.09
23.36
35.93
42.21
48.49
19.53
29.58
34.61
39.64
64.46
92.25
106.15
120.04
29.36
41.93
48.21
54.49
23.53
33.58
38.61
43.64

56.50
81.63
87.91
103.62
29.00
41.57
44.71
52.56
24.00
34.05
36.57
42.85
58.13
89.54
105.25
120.95
29.00
44.71
52.56
60.41
24.25
36.82
43.10
49.38
80.13
114.86
132.23
149.60
36.50
52.21
60.06
67.91
29.25
41.82
48.10
54.38

72.70
92.81
97.83
110.40
36.95
47.00
49.52
55.80
30.45
38.49
40.50
45.53
74.00
99.13
111.70
124.26
36.95
49.52
55.80
62.08
30.65
40.70
45.73
50.76
102.60
130.39
144.29
158.18
46.70
59.27
65.55
71.83
37.15
47.20
52.23
57.26

—
20.11
25.13
37.70
—
10.05
12.57
18.85
—
8.04
10.05
15.08
—
25.13
37.70
50.26
—
12.57
18.85
25.13
—
10.05
15.08
20.11
—
27.79
41.69
55.58
—
12.57
18.85
25.13
—
10.05
15.08
20.11

100
200
60
60
80
40
60
100
200
60
80
80
40
60

200
60
80
80
100
60
80

70
90
110
35
45
50
30
35
40
45
70
90
110
35
45
50
60
30
40
45
50
100
125
N/A
45
50
60
70
35
45
50

Table 3 — Electrical Data With VAV Option
UNIT SIZE
62M*

VFD
VOLTAGE
V-Ph-Hz

ERV
WHEEL
FLA

VFD
CURRENT
INPUT
VALUE
AMP

115-1-60

0.7

9.2

230-1-60**

075

5.2

208/230-3-60

EXHAUST AND SUPPLY
FAN MOTOR
HEATER
SIZE
(kW)
NEC - FLA
Hp

2.2

2.8

0.5

0.3
460-3-60

1.5

1.1

575-3-60

2.1

0.9

115-1-60

120

0.7

16.6

230-1-60**

9.6

208/230-3-60

5.3

4.2

0.3
460-3-60

2.6

2.1

575-3-60

2.1

1.7

230-1-60**

9.6
4.2

208/230-3-60
170

5.3
0.6

460-3-60

2.6

575-3-60

2.1

208/230-3-60

225

460-3-60

575-3-60

8.2

0.6

2.1

1.7

6.8

4.2

3.4

3.6

2.7

—
2
5
—
2
5
—
2
5
—
2
5
—
2
5
—
2
5
—
2
5
—
5
8
—
2
5
—
2
5
—
5
8
10
—
5
8
10
—
5
8
10
—
5
8
10
—
5
8
10
—
5
8
10
—
5
8
10

FLA

MCA

DISCONNECT
PRE-HEATER
(Optional)
(Optional)
Size†
FLA
Amps Fuse
MOCP
Amps

19.75
37.14
63.23
11.05
19.74
32.79
6.26
11.28
18.82
3.24
5.76
9.53
4.41
6.42
9.43
34.55
51.94
78.03
19.80
28.49
41.54
11.26
16.28
23.82
5.53
8.05
11.82
4.41
6.42
9.43
20.10
41.84
54.88
63.57
11.56
24.12
31.66
36.69
5.70
11.98
15.75
18.26
4.58
9.61
12.62
14.63
17.39
29.95
37.49
42.52
8.82
15.11
18.88
21.39
7.66
12.68
15.70
17.71

23.00
44.74
77.35
13.02
23.89
40.19
7.03
13.31
22.74
3.65
6.79
11.50
5.13
7.64
11.41
41.50
63.24
95.85
23.96
34.83
51.13
13.28
19.56
28.99
6.51
9.65
14.36
5.13
7.64
11.41
23.96
51.13
67.44
78.31
13.28
28.99
38.41
44.70
6.51
14.36
19.08
22.22
5.13
11.41
15.18
17.69
20.57
36.28
45.70
51.99
10.42
18.27
22.98
26.12
8.97
15.26
19.03
21.54

29.90
47.29
77.35
16.93
25.62
40.19
9.14
14.17
22.74
4.74
7.25
11.50
6.67
8.68
11.69
53.95
71.34
97.43
31.15
39.84
52.88
17.27
22.29
29.83
8.46
10.98
14.75
6.67
8.68
11.69
31.15
52.88
67.44
78.31
17.27
29.83
38.41
44.70
8.46
14.75
19.08
22.22
6.67
11.69
15.18
17.69
26.74
39.31
46.85
51.99
13.54
19.82
23.59
26.12
11.66
16.69
19.71
21.72

POWER SUPPLY

—
17.39
43.48
—
8.70
21.74
—
5.03
12.57
—
2.51
6.28
—
2.01
5.03
—
17.39
43.48
—
8.70
21.74
—
5.03
12.57
—
2.51
6.28
—
2.01
5.03
—
21.74
34.98
43.48
—
12.57
20.11
25.13
—
6.28
10.05
12.57
—
5.03
8.04
10.05
—
12.57
20.11
25.13
—
6.28
10.05
12.57
—
5.03
8.04
10.05

40
60
100
30
60

80
100
200
40
60
80
30
30
40

40
80
80
100
30
40
60
60

40
60
30
40

25
45
70
15
25
40
8
12
20
5
6
10
6
8
10
50
70
90
30
35
50
15
20
25
8
10
12
6
8
10
30
50
60
70
15
25
35
40
8
12
17.5
20
6
10
15
17.5
25
35
45
50
12
17.5
20
25
10
15
17.5
20

Table 3 — Electrical Data With VAV Option (cont)
UNIT SIZE
62M*

VFD
VOLTAGE
V-Ph-Hz

ERV
WHEEL
FLA

208/230-3-60

460-3-60

285

0.6

575-3-60

460-3-60

575-3-60

460-3-60

1.2

575-3-60

ERV
FLA
Hp
MCA
MOCP
NEC
N/A
VFD

—
—
—
—
—
—
—
—

4.2

5.6

4.8

208/230-3-60

460-3-60

3.4

11.3

575-3-60

550

4.2

3.6

208/230-3-60

430

6.8

8.2

1.2

17.8

1.2

EXHAUST AND SUPPLY
FAN MOTOR
HEATER
SIZE
(kW)
NEC - FLA
Hp

8.2

3.6

208/230-3-60

330

VFD
CURRENT
INPUT
VALUE
AMP

7.6

2.7

6.8

3.4

2.7

9.6

4.8

3.9

15.2

7.6

6.1

LEGEND
Energy Recovery Ventilator
Full Load Amps
Horsepower
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electric Code
Not Applicable
Variable Frequency Drive

*The VAV option is not available on 62M040 units.
†Fused disconnect only.
**Exhaust and supply fan motors are 230-3-60.

—
5
8
10
—
5
8
10
—
5
8
10
—
8
10
15
—
8
10
15
—
8
10
15
—
8
10
15
—
8
10
15
—
8
10
15
—
8
10
15
—
8
10
15
—
8
10
15

POWER SUPPLY
FLA

MCA

MOCP

17.39
29.95
37.49
42.52
8.82
15.11
18.88
21.39
7.66
12.68
15.70
17.71
17.99
38.09
43.12
55.69
9.15
19.20
21.71
28.00
7.83
15.87
17.88
22.91
24.03
44.14
49.16
61.73
12.07
22.12
24.63
30.91
10.29
18.33
20.34
25.37
37.16
57.26
62.29
74.85
18.73
28.78
31.30
37.58
15.83
23.87
25.88
30.91

20.57
36.28
45.70
51.99
10.42
18.27
22.98
26.12
8.97
15.26
19.03
21.54
20.57
45.70
51.99
67.70
10.42
22.98
26.12
33.98
8.97
19.03
21.54
27.82
28.13
53.26
59.54
75.25
14.06
26.63
29.77
37.62
12.05
22.10
24.61
30.90
44.53
69.66
75.95
91.65
22.40
34.96
38.10
45.96
18.97
29.02
31.54
37.82

26.74
39.31
46.85
51.99
13.54
19.82
23.59
26.12
11.66
16.69
19.71
21.72
26.74
46.85
51.99
67.70
13.54
23.59
26.12
33.98
11.66
19.71
21.72
27.82
36.56
56.67
61.69
75.25
18.28
28.33
30.85
37.62
15.66
23.71
25.72
30.90
57.89
78.00
83.02
95.59
29.11
39.17
41.68
47.96
24.66
32.70
34.71
39.74

DISCONNECT
PRE-HEATER
(Optional)
(Optional)
Size†
FLA
Amps Fuse
Amps
—
12.57
20.11
25.13
—
6.28
10.05
12.57
—
5.03
8.04
10.05
—
20.11
25.13
37.70
—
10.05
12.57
18.85
—
8.04
10.05
15.08
—
20.11
25.13
37.70
—
10.05
12.57
18.85
—
8.04
10.05
15.08
—
20.11
25.13
37.70
—
10.05
12.57
18.85
—
8.04
10.05
15.08

40
60

30
40
30
40
60
80
30
40
30
40
60
80
100
30
40
60
30
40
80
100
200
40
60
30
40
60

25
35
45
50
12
17.5
20
25
10
15
17.5
20
25
45
50
60
12
20
25
30
10
18
20
25
35
50
60
70
18
25
30
35
15
20
25
30
50
70
80
90
25
35
40
45
20
30
30
35

Table 3 — Electrical Data With VAV Option (cont)
UNIT SIZE
62M*

VFD
VOLTAGE
V-Ph-Hz

ERV
WHEEL
FLA

208/230-3-60

460-3-60

640

1.2

575-3-60

VFD
CURRENT
INPUT
VALUE
AMP

EXHAUST AND SUPPLY
FAN MOTOR
NEC - FLA

12.9

11.5

9
7.5

208/230-3-60

750

950

—
—
—
—
—
—
—
—

460-3-60

1.2

12.9

575-3-60

1.4

11.5

208/230-3-60

2.5

30.8

460-3-60

1.2

16.5

575-3-60

ERV
FLA
Hp
MCA
MOCP
NEC
N/A
VFD

2.5

1.4

LEGEND
Energy Recovery Ventilator
Full Load Amps
Horsepower
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electric Code
Not Applicable
Variable Frequency Drive

*The VAV option is not available on 62M040 units.
†Fused disconnect only.
**Exhaust and supply fan motors are 230-3-60.

HEATER
SIZE
(kW)

POWER SUPPLY
FLA

MCA

MOCP

PREHEATER
(Optional)
FLA

—
8
10
15
—
8
10
15
—
8
10
15
—
10
15
20
—
10
15
20
—
10
15
20
—
10
15
20
—
10
15
20
—
10
15
20

53.61
73.72
78.75
91.31
26.65
36.70
39.21
45.50
23.62
31.66
33.67
38.70
54.91
80.05
92.61
105.18
27.20
39.76
46.05
52.33
24.50
34.55
39.58
44.61
70.86
98.65
112.55
126.44
34.28
46.85
53.13
59.41
29.63
39.68
44.71
49.73

65.10
90.24
96.52
112.23
32.29
44.86
48.00
55.85
28.71
38.76
41.28
47.56
65.10
96.52
112.23
127.93
32.29
48.00
55.85
63.71
28.71
41.28
47.56
53.84
85.00
119.74
137.11
154.48
41.15
56.85
64.71
72.56
35.12
47.69
53.97
60.25

84.64
104.74
109.77
122.33
41.98
52.03
54.55
60.83
37.33
45.37
47.38
52.40
84.64
109.77
122.33
134.90
41.98
54.55
60.83
67.11
37.33
47.38
52.40
57.43
110.50
138.29
152.19
166.08
53.49
66.06
72.34
78.62
45.66
55.71
60.74
65.76

—
20.11
25.13
37.70
—
10.05
12.57
18.85
—
8.04
10.05
15.08
—
25.13
37.70
50.26
—
12.57
18.85
25.13
—
10.05
15.08
20.11
—
27.79
41.69
55.58
—
12.57
18.85
25.13
—
10.05
15.08
20.11

DISCONNECT
(Optional)
Amps
100
200
60
80
60
80
100
200
60
80
60
80

200

80
100
60
80

Fuse Size†
Amps
80
100
100
110
40
50
50
60
35
45
45
50
80
100
110
125
40
50
60
60
35
45
50
50
110
125
N/A
N/A
50
60
70
70
45
50
60
60

20
Economizer
harness/plug coming
from control box in
HVAC unit.
Actuator
(Motor)
Black

19
18
17
16
15
14

Important: Remove
and re-install through
end switch

Jumper
in plug
leave.

Economizer
End switch

Fig. 48 — Economizer End Switch Wiring

Jumper plug
shipped attached
economizer plug.
Brown

Fig. 47 — Jumper Plug Detail

20
19

Economizer
Switch

18
17

Economizer
Gear hub

16
15
14
Switch
Bracket

Fig. 49 — Economizer Switch Wiring

See Note

Before performing service or maintenance operations on 62M unit,
turn off power switches to unit. Multiple switches may exist. Electrical
shock could cause personal injury or death.

See Note

3PDT
DPDT
ERV
FIOP

See Note

—
—
—
—

See Note

LEGEND
Three Pole, Dual Throw Relay FLA
Dual Pole, Dual Throw Relay
GRD
Energy Recovery Ventilator
MCA
Factory-Installed Option
OTP

See Note

Fig. 50 — Typical Wiring Schematic, High Voltage

NOTES:
1. Transformer for ERV wheel only used on 460-v, 575-v, 115-v ERV units.
2. On single-phase ERV units the L3 and T3 terminals on supply blower contactor and exhaust blower contactor
are not used.
3. Overload thermal protection only used on 62M330-640 units with 5 hp and 71/2 hp motors.
4. Red wire not used on 115-v, 208/230-v single-phase units.
5. Wire color determined by primary voltage and transformer type used.
6. On 115-v units, L2 becomes neutral. On 208/230-v single-phase units, L3 does not exist.
7. On units with total fusing greater than 30 amps, when pre-heater is installed and fused disconnect option is
selected, fusing will be separated. ERV and pre-heater will have separate fusing.
8. DPDT relay may be substituted. If so, pins 2, 5 and 8 will not exist.
9. Follow all local and other applicable codes.
10. Only qualified electrical contractors should install or service these ERV units.
11. For electrical characteristics (FLA, MCA) refer to charts in this booklet.
12. This diagram is for constant volume units.

See Note

—
—
—
—

Full Load Amps
Ground
Minimum Circuit Amps
Overload Thermal Protection

See Note

—
—
—
—
—

NC
NO
PRI
SEC

—
—
—
—

Normally Closed
Normally Open
Primary
Secondary

See Note

(Optional)

See Note

Before performing service or maintenance operations on 62M
unit, turn off power switches to unit. Multiple switches may exist.
Electrical shock could cause personal injury or death.

Fig. 51 — Typical Wiring Schematic, 24-V Control Circuit

NOTES:
1. Stand-Alone Application: As shown, ERV will start when power is applied. Interrupt jumpers 6/8 and 7/9
for external control.
2. Jumpers between 6 and 8, and 7 and 9, will be factory added for stand-alone units.
3. Relay throughput: 1/3 hp, 120 vac, 10 amp, 240 vac.
4. On 575-v units transformer may substitute internal breaker on secondary for fuse.
5. Door switches are optional.
6. DPDT relay may be substituted. If so, pins 2, 5 and 8 will not exist.

3PDT
COM
DPDT
ERV
MCA

See Note

LEGEND
Three Pole, Dual Throw Relay
Common
Dual Pole, Dual Throw Relay
Energy Recovery Ventilator
Minimum Circuit Amps

See Note

—
—
—
—
—
—

LEGEND
Common
Dual Pole, Dual Throw Relay
Energy Recovery Ventilator
Ground
Normally Closed
Normally Open

See Note

Fig. 52 — Typical Wiring Schematic, High/Low Voltage with Variable Air Volume Option

4. Variable frequency drives are sensitive to the polarity of a 0 to 10 volt DC control signal. If the control
source is acting properly and the voltage variance can be detected on the proper leads of the VFD,
reverse the leads and the controller will respond.
5. Three-phase motor on all 62M750,950 units.
6. Color determined by primary voltage: Red — 200 vac, Orange — 230 vac, Black — 460 vac.
7. 0 to 10 volt and 4 to 20 mA inputs are polarity sensitive. Reverse leads if signal fails to update controller.
8. DPDT relay may be substituted. If so, pins 2, 5 and 8 will not exist.

(OPTIONAL)

See Note

(OPTIONAL)

See Note

NOTES:
1. When the 62M unit is used in a stand-alone application, the solid-state relay will be added to activate
ERV at approximately 2 volts. CO2 sensor output signal is sent to relay. Coupled units are activated
through HVAC unit.
2. Supply and Exhaust Variable Frequency Drive (VFD) terminals no. 25 and no. 2 can be used as a
4 to 20 mA power control source, if desired.
3. Transformer not necessary on all 62M750,950 units.

High Voltage
Low Voltage

WIRING LEGEND

COM
DPDT
ERV
GRD
NC
NO

Before performing service or maintenance operations on 62M unit, turn off power
switches to unit. Multiple switches may exist. Electrical shock could cause personal
injury or death.

See Note

Fig. 53 — Typical Wiring Schematic, Optional Preheat High Voltage and Control Circuits

DISCONNECT
(FIOP)

NOTES:
1. Thermostat is factory set at –5 degrees. Range is –30 to 100 F.
2. MInimum airflow is .05 in. wg.

START-UP

To achieve the highest level of effectiveness, the airflow
across the supply and return should be equal.
FACTORY SETTING — The ERV unit is factory set to
achieve the maximum airflow cfm within the cabinet’s range.
For example, a 62M170 unit has a range of 1,400 to 2,000 cfm
airflow, and when shipped will be setup to achieve the
2,000 cfm airflow level. See Fig. 57-80.
CURVE SELECTION — Refer to the fan curve for the ERV
unit being used for the application. See Fig. 57-80. Knowing
the outside air intake cfm required and the external static
pressure on the application, select the fan curve desired. The
fan curve will indicate how to set the blower motor pulley to
achieve the desired cfm level. If the job requirements are the
same as the maximum ERV unit setup, then no blower adjustments are required.
ADJUST THE ERV BLOWER SPEED — If jobsite conditions require blower speeds other than the factory setting, then
the ERV blower(s) will have to be adjusted. The fan curve will
specify the number of turns to be made to the adjustable pulley
on the blower motor. See Fig. 57-80.
Belt Drive Motors — Check pulley alignment and belt tension
prior to set up. To change the speeds of the blowers:
1. Shut off power supply and tag disconnect.
2. Loosen belt tension.
3. Loosen adjustable (movable) pulley flange set screw. See
Fig. 81.
4. Screw adjustable pulley side toward the fixed side to
increase speed or away from fixed side to decrease speed.
Increasing speed increases load on motor. Do not exceed
maximum load for motor.
5. Set adjustable pulley side at nearest keyway of pulley hub
and tighten set screw. See fan curves for speed change for
each turn of the adjustable pulley.
Aligning Blower and Motor Pulleys — It is important that
the pulleys be exactly in line with one another. See Fig. 82.
1. Loosen blower pulley set screw.
2. Align pulleys per illustration. Motor and blower shafts
must be parallel.
3. Tighten pulley set screws.
Adjust Belt Tension — Loosen blower motor mounting nuts.
and slide motor mounting plate away from fan scroll for proper
belt tension (1/2-in. deflection with 7 to 10 lb of force.)
MEASURE MOTOR VOLTAGE, AMPERAGE AND FAN
RPM — Measure and record the input voltage and motor
amperage(s). To measure the fan rpm, the blower door will
need to be opened. Minimize measurement time because the
motor may over-amp with the door removed. Do not operate
units with access doors/panels open as the motors will overload. With the blower door closed, compare measured amps to
the motor nameplate full load amps and correct if the ERV unit
is over-amping.
BELT MAINTENANCE — Premature belt failures are frequently caused by improper belt tension (either too tight or too
loose), or misaligned pulleys. The proper tension for operating
a V-belt is the lowest tension at which the belts will not slip at
peak load conditions. Check belt tension two weeks after startup and periodically thereafter. It is very important that the drive
pulleys remain in proper alignment after adjustments are made.
Misalignment of pulleys will result in premature belt wear,
noise, vibration, and power loss. Maintain belts and motors
through the provided access panels. Refer to Fig. 82.
Text continued on page 74.

Do not operate the ERV unit without the filters and birdscreens installed, which prevent foreign objects from entering the unit.
Use the following information and the Start-Up Checklist
on page CL-1 to check unit PRIOR to start-up.

Unit Preparation — Check that the unit has been installed in accordance with these installation instructions and all
applicable codes.
Check all fasteners and set screws for tightness. This is
critical for bearings and fan wheels. Also, if dampers are not
motorized, check that they open and close without binding.

Internal Wiring — Check all electrical connections in the
control box. Tighten as required.

Rain Hoods — Some ERV units will require the outside
air and/or exhaust hood to be field installed. Caulk coupled
flanges and screw to ERV unit.
NOTE: Units for indoor applications will not have rain hoods.
The outside air hood will include aluminum water entrainment filters, which should be in place prior to starting the unit.
Energy Recovery Wheel
DRIVE BELT — Turn the energy recovery wheel by hand to
verify free operation. Inspect the belt, which drives the energy
wheel rotation. Make sure the belt rides smoothly through the
pulley and over the wheel rim.
AIR SEALS — Check that the air seals, located around the
outside of the wheel and across the center, on both sides of
wheel, are secure and in good condition. Air seals which are
too tight will prevent proper rotation of the energy recovery
wheel. Re-check the air seals for tightness.
Air seal clearance may be checked by placing a sheet of
paper, like a feeler gage, against the wheel face. To adjust the
air seals, loosen all eight seal retaining screws. These screws
are located on the bearing support that spans the length of the
cassette through the wheel center. Tighten the screws so the air
seals tug slightly on the sheet of paper as the wheel is turned.
Replace the access door and apply power. Observe that the
wheel rotates freely. If the wheel does not rotate or is binding,
remove the cassette and adjust.

Blower Rotation — First, hand-rotate the blower to ensure that the wheel is not rubbing against the scroll. If the
blower is rotating in the wrong direction, the ERV unit will
move some air, but will not perform properly.
To change the rotation, turn the power off and use the
following procedure:
• Single-phase units — Rewire the motor per the instructions located on the motor.
• Three-phase units — Interchange any two power leads.
This can be done at the motor starter.

Airflow Settings and Adjustments — Most ERV
units have factory-installed airflow test ports, which allow the
balancer of the job to easily measure the static pressure across
the ERV wheel, and thus the system airflow cfm levels. The
static is measured on both the supply and return sides of the
wheel. See Fig. 54-56.

0.8
62M040

Pressure Drop (in. wg)

0.7

62M120

0.6
62M075
0.5

0.4

0.3

0.2
200

400

600

800
Airflow

1000

1200

1400

(cfm)

*Data based on measurements taken using optional airflow test ports.

Fig. 54 — 62M040-120 ERV Wheel Pressure Drop*

1.2

Pressure Drop (in. wg)

1.1

62M330,430

1
62M285

62M170,225
0.9

0.8

0.7

0.6

0.5

0.4
1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 3800 4000 4200 4400 4600 4800 5000

Airflow (cfm)
*Data based on measurements taken using optional airflow test ports.

Fig. 55 — 62M170-430 ERV Wheel Pressure Drop*

1.2
62M550,640

62M750,950

Pressure Drop (in. wg)

1.1

0.9

0.8

0.7

0.6

0.5
5000

5500

6000

6500

7000

7500

8000

8500

9000

9500

Airflow (cfm)
*Data based on measurements taken using optional airflow test ports.

Fig. 56 — 62M550-950 ERV Wheel Pressure Drop* (cont)

10000

10500

11000

600

Airflow (cfm)

500

400
Supply Air High Speed
Supply Air Speed Three
300

Supply Air Speed Two
Supply Air Low Speed

200

100

0
0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

1.60

External Static Pressure (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 57 — 62M040 Supply Air Fan Performance Curves

600

500

AIirflow (cfm)

400
Exhaust Air High Speed
Exhaust Air Speed Three

300

Exhaust Air Speed Two
Exhaust Air Low Speed

200

100

0
0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

NOTE: Fan data includes pressure drop
for 30% efficient
2-in. filters. (in. wg)
External
Static Pressure
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 58 — 62M040 Exhaust Air Fan Performance Curves

1.60

1400

1200

Airflow (cfm)

1000
1112 rpm: 2 turns

800

1058 rpm: 3 turns
1002 rpm: 4 turns
600

942 rpm: 5 turns

400

200

0
0.1

0.3

0.5

0.7

0.9

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 59 — 62M075 Supply Air Fan Performance Curves

1200

Airflow (cfm)

1000
800

1136 rpm: 2 turns
1081 rpm: 3 turns

600

1010 rpm: 4 turns
946 rpm: 5 turns

400
200
0
0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 60 — 62M075 Exhaust Air Fan Performance Curves

1575

Airflow (cfm)

1375

1175
1448 rpm: 2 turns
1315 rpm: 3 turns

975

1277 rpm: 4 turns
1194 rpm: 5 turns

775

575

375
0.2

0.4

0.6

0.8

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 61 — 62M120 Supply Air Fan Performance Curves

1475

Airflow (cfm)

1275

1075
1399 rpm: 2 turns
1332 rpm: 3 turns

875

1244 rpm: 4 turns
1162 rpm: 5 turns

675

475

275
0.2

0.4

0.6

0.8

1.0

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 62 — 62M120 Exhaust Air Fan Performance Curves

2800
2600

Airflow (cfm)

2400
2200
1121 rpm: 3 turns

2000

1074 rpm: 4 turns
1017 rpm: 5 turns

1800

937 rpm: 6 turns

1600
1400
1200
1000
0.2

0.4

0.6

0.8

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 63 — 62M170 Supply Air Fan Performance Curves

2600

Airflow (cfm)

2400
2200
1068 rpm: 3 turns

2000

1045 rpm: 4 turns
1800

1018 rpm: 5 turns
977 rpm: 6 turns

1600
1400
1200
1000
0.2

0.4

0.6

0.8

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 64 — 62M170 Exhaust Air Fan Performance Curves

Airflow (cfm)

3000

2500
1159 rpm: 3 turns
1114 rpm: 4 turns
2000

1054 rpm: 5 turns

1500

1000
0.2

0.4

0.6

0.8

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 65 — 62M225 Supply Air Fan Performance Curves

Airflow (cfm)

3000

2500

1077 rpm: 3 turns
1052 rpm: 4 turns
1024 rpm: 5 turns

2000

964 rpm: 6 turns
1500

1000
0.2

0.4

0.6

0.8

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 66 — 62M225 Exhaust Air Fan Performance Curves

3500

Airflow (cfm)

3000
1186 rpm: 2 turns
2500

1109 rpm: 3 turns
1057 rpm: 4 turns
1010 rpm: 5 turns

2000

1500

1000
0.1

0.3

0.5

0.7

0.9

1.1

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 67 — 62M285 Supply Air Fan Performance Curves

3500

Airflow (cfm)

3000

2500

1193 rpm: 2 turns
1147 rpm: 3 turns
1097 rpm: 4 turns
1062 rpm: 5 turns

2000

1500

1000
0.1

0.3

0.5

0.7

0.9

1.1

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 68 — 62M285 Exhaust Air Fan Performance Curves

4500

Airflow (cfm)

4000

3500

833 rpm: 2 turns
803 rpm: 3 turns
763 rpm: 4 turns

3000

2500

2000
0.10

0.20

0.30

0.40

0.50

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 69 — 62M330 Supply Air Fan Performance Curves

4000
3800

Airflow (cfm)

3600
3400
3200

842 rpm: 2 turns

3000

808 rpm: 3 turns

2800

770 rpm: 4 turns

2600
2400
2200
2000
0.13

0.20

0.30
0.40
External Static (in. wg)

0.50

NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 70 — 62M330 Exhaust Air Fan Performance Curves

5500

5000

Airflow (cfm)

4500
962 rpm: 3 turns
942 rpm: 4 turns

4000

891 rpm: 5 turns

3500

3000

2500
0. 20

0. 40

0. 60

0. 80

1. 00

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 71 — 62M430 Supply Air Fan Performance Curves

5500

5000

Airflow (cfm)

4500

871 rpm: 4 turns

4000

891 rpm: 5 turns

3500

3000

2500
0. 20

0. 40

0. 60

0. 80

1. 00

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 72 — 62M430 Exhaust Air Fan Performance Curves

6500
6000
1109 rpm: 2 turns

Airflow (cfm)

5500

1068 rpm: 3 turns
5000

1014 rpm: 4 turns

4500

968 rpm: 5 turns

4000
3500
3000
2500
2000
0.2

0.4

0.6

0.8

1.0

1.2

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 73 — 62M550 Supply Air Fan Performance Curves

6 500
6 000

Airflow (cfm)

5 500
5 000

1109 rpm: 2 turns

4 500

1049 rpm: 3 turns
998 rpm: 4 turns

4 000

947 rpm: 5 turns

3 500
3 000
2 500
2 000
0 .3

0 .4

0 .6

0 .8

1 .0

1 .2

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 74 — 62M550 Exhaust Air Fan Performance Curves

7500

Airflow (cfm)

7000

6500

1256 rpm: 2 turns
1174 rpm: 3 turns
1150 rpm: 4 turns

6000

5500

5000
0.25

0.45

0.65

0.85

1.00

1.20

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 75 — 62M640 Supply Air Fan Performance Curves

8000

Airflow (cfm)

7500
7000
1202 rpm : 0 turns
1152 rpm: 1 turn

6500

1123 rpm: 2 turns
1096 rpm: 3 turns

6000
5500
5000
0.4

0.5

0.6

0.7

0.9

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 76 — 62M640 Exhaust Air Fan Performance Curves

9500

Airflow (cfm)

9000
8500
906 rpm: 0 turns

8000

870 rpm: 1 turns
847 rpm: 2 turns

7500

821 rpm: 3 turns

7000

807 rpm: 4 turns

6500
6000
5500
0.10

0.30

0.50

0.70

0.90

1.10

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 77 — 62M750 Supply Air Fan Performance Curves

9000

Airflow (cfm)

8500
8000

923 rpm : 0 turns

7500

898 rpm: 1 turn
862 rpm: 2 turns

7000

844 rpm: 3 turns

6500

813 rpm: 4 turns

6000
5500
0.3

0.5

0.7

0.9

1.1

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 78 — 62M750 Exhaust Air Fan Performance Curves

11500
11000

Airflow (cfm)

10500
10000
9500

966 rpm: 3 turns

9000

896 rpm: 4 turns

8500

831 rpm: 5 turns

8000
7500
7000
6500
0.10

0.30

0.50

0.70

0.90

1.10

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 79 — 62M950 Supply Air Fan Performance Curves

11000

Airflow (cfm)

10500
10000
9500
1024 rpm: 3 turns
9000

962 rpm: 4 turns
929 rpm: 5 turns

8500
8000
7500
7000
0.3

0.5

0.7

0.9

1.1

External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.

Fig. 80 — 62M950 Exhaust Air Fan Performance Curves

Occupied Mode, with CO2 Sensor — When the CO2 sensor
is used, it will measure the space CO2 levels in parts per
million (ppm). The 62M ERV CO2 setting is factory set at
1,000 ppm but can be adjusted from 0 ppm to 2,000 ppm.
When either the scheduling program and/or the CO2 sensor
calls for ERV operation, the ERV will activate the following:
• ERV wheel
• Outdoor air blower motor
• EXH blower motor
• Two-position damper opens
NOTE: The two-position damper option may slightly delay
activation of the ERV blower motor.
Occupied Mode, with Frost Protection — In the occupied
mode, the frost protection option will eliminate frost build-up
on the ERV wheel using exhaust air. It is activated via a
pressure differential across the ERV wheel. This set point is
field set from 0.2 in. wg to 2.0 in. wg and must be set to 150%
of the normal static pressure across the wheel. The frost protection feature is automatically locked out above 35 F.
NOTE: If the outdoor-air temperature is below 35 F, a dirty
wheel may incorrectly activate the frost control feature if the
differential pressure across the wheel exceeds the set point.
When the frost protection option is activated the following
will occur:
• ERV wheel turns on.
• Outdoor air blower motor turns off.
• EXH blower motor is on.
Occupied Mode, with the Pre-Heat Option — In the occupied mode, the pre-heat option provides frost protection for the
ERV wheel and slightly warms the outdoor air. This feature is
factory set to activate at –5 F, and can be field adjusted from
–30 F to 100 F. It is recommended that this set point be set at
the frost threshold for the region in which it is used.
If desired, this feature may also be activated via a field
supplied pressure differential switch to determine if frost build
up has occurred on the ERV wheel.
Occupied Mode, with the Economizer Accessory — When
using the economizer option, this allows for up to 100%
outside air to be brought in for free cooling. During free
cooling, the rooftop unit mechanical cooling may or may not
be operating depending on the set points used with the rooftop
unit. When using the economizer accessory, it is recommended
that the minimum position be set to the closed position and the
ERV should be set such that it is locked out when the economizer opens far enough to bring in the same level of outdoor air
as the ERV.
If desired, this feature may also be activated via a
field-supplied pressure differential switch to determine if frost
build- up has occurred on the ERV wheel.
During free cooling, the following occurs:
• ERV wheel is turned off.
• Outdoor air blower is turned off.
• EXH blower motor turns on.
• Two-position outdoor-air damper is closed (if used).
• Two-position EXH damper is opened (if used).
• Stop/jog option will periodically rotate the ERV wheel
to clean it during wheel bypass operation. This feature is
factory set to activate every 10 minutes, for 20 seconds
of operation. Both settings can be adjusted from 0 to 10
minutes.
Wheel Bypass Option — When using the wheel bypass option
(with the stop/jog option), this allows free cooling through the
wheel limited by the ERV airflow cfm limits. With this option
the unit can be in free cooling or not depending on the temperature of the outdoor-air compared to the set point. When not in
free cooling, the ERV will not operate. When in free cooling:
• ERV wheel is turned off.
• Outdoor-air blower is turned on.

Fig. 81 — Blower Motor Pulley Adjustment

Fig. 82 — Belt Alignment

Variable Air Volume Option — This option can be
used in conjunction with the CO2 sensor option (ordered
separately). Outside air and exhaust air blower speeds are
independently controlled by variable frequency drives and
modulated based upon space occupancy, which can be
measured by CO2. The more people in the space the greater the
CO2 levels, the more outside air is introduced. This option
eliminates over ventilating the space in less than full conditions. The ERV unit has completely different electrical characteristics when used with a variable air volume option. Refer to
Tables 2 and 3.
Operating Sequence
OCCUPIED MODE — While in occupied mode, the 62M
ERV will operate per the ERV Timer option (scheduling
program), the CO2 sensor input, a combination of the scheduling option and CO2 input, or the economizer accessory.
Additionally, the low temperature lockout (LTLO) function
locks out the 62M ERV if the outdoor-air temperature entering
the wheel is below the set point. The LTLO is factory set at
–10 F, and can be field adjusted from –30 F to 100 F.
74

•
•
•

EXH blower motor is turned on.
The two-position damper is open (if used).
The stop/jog option will periodically rotate the ERV
wheel to clean it during wheel bypass operation. This
feature is factory set to activate every 10 minutes, for
20 seconds of operation. Both settings can be adjusted
from 0 to 10 minutes.
UNOCCUPIED MODE — While in unoccupied mode, when
below the low temperature lockout set point, the ERV wheel is
off, and only the two-position damper option is opened to
allow free cooling when desired. The dampers are controlled
by either the ERV Timer option (scheduling program) or the
CO2 sensor input. Additionally, the frost protection and preheat
options are also off. The low temperature lockout (LTLO)
function locks out the 62M ERV if the outdoor-air temperature
entering the wheel is below the set point. The LTLO is factory
set at –10 F, and can be field adjusted from –30 F to 100 F.
When above the low temperature lockout set point and
cooling is desired the economizer or wheel bypass option is
also used. Depending on the option used with the 62M ERV,
several sequences of operation could occur.
Unoccupied Mode, with the Economizer Accessory — When
using the economizer option, this allows for up to 100% outside air to be brought in for free cooling. During free cooling,
no mechanical cooling is operating and the following occurs:
• ERV wheel is turned off.
• Outdoor air blower motor is off.
• EXH blower motor is off.
• Two-position OA damper option is closed (if used).
• Two-position EXH damper is open (if used).
• The stop/jog option will periodically rotate the ERV
wheel to clean it during wheel bypass operation.
When using the economizer option and mechanical cooling
is operating, the economizer should be closed or at the minimum position.
Unoccupied Mode, with the Wheel Bypass Option — When
using the wheel bypass option (with the stop/jog option), this
allows free cooling through the wheel limited by the ERV cfm
limits. With this option the unit can be in free cooling or not
depending on the temperature of the OA compared to the
set point. When in free cooling:
• ERV wheel is turned off.
• Outdoor air blower is on.
• EXH blower motor is on.
• Two-position damper is open (if used).
When not in free cooling:
• ERV wheel is turned off.
• Outdoor air blower motor is turned off.
• EXH blower motor is turned off.
• Two-position damper is closed (if used).

To install the segments see the Installing Wheel Segments
(62M075-950) section.

Removing and Installing Non-Segmented Wheel
for Cleaning (62M040 Units) — Non-segmented energy transfer wheels are secured to the shaft and bearing support
beam by a Phillips head screw and hub cover. See Fig. 84.
To remove the energy transfer wheel, follow Steps 1-4
below. (See Fig. 84.) Reverse procedure for wheel installation.
1. Remove front seal assembly (pulley side of cassette) if
present.
2. Remove belt from pulley and position temporarily around
wheel rim.
3. Remove the hub cover from the wheel. Note the wheel to
shaft alignment pin under the hub cover. Ensure this pin
engages the notch at the end of the shaft when reinstalling
the wheel.
4. Pull the wheel straight off the shaft. Handle wheel with
care to prevent distorting of the wheel.

Fig. 83 — Unlocking the
Segment Retaining Brackets

Alignment
Pin

Cassette
Housing/Frame

SERVICE
Shaft

Disconnect electrical power before servicing energy recovery cassette.

Removing Wheel Segments for Cleaning
(62M170-950 Units)

Bearings (2)

1. Unlock and open the segment retaining brackets on both
sides of the selected segment opening. Refer to Fig. 83.
2. Gently lift segment outward.
3. Close segment retaining latches and rotate wheel 180 degrees to remove next segment. Follow this pattern to
remove all segments. This pattern will help keep wheel
balanced.

Hub Cover

Wheel &
Hub

Fig. 84 — 62M040 Energy
Transfer Wheel Assembly
75

Removing and Installing Non-Segmented
Wheel for Cleaning (62M075, 120 Units) —
Non-segmented energy transfer wheels include the shaft and
are secured to two wheel support beams by two flange bearings
with locking collars. See Fig. 85.
To remove the energy transfer wheel follow Steps 1-4
below. Reverse procedure for wheel installation.
1. Pull the wheel with shaft straight out of the motor side
wheel support beam and bearing. Handle wheel with care
to prevent distorting of the wheel.
2. Remove the pulley side wheel support beam with bearing
by removing the 4 support beam screws.
3. Remove the belt from the pulley and position temporarily
around the wheel rim.
4. Loosen the two set screws on each of the two wheel
bearings. See Fig. 85.

WHEEL,
HUB &
SHAFT
FLANGE
BEARINGS
(2)

SET
SCREWS
(2) EACH

When replacing wheel, retighten the 4 bearing set screws.
Premature bearing failure could result.

Installing
Units)

Wheel

Segments

WHEEL SUPPORT BEAMS

Fig. 85 — 62M075,120 Energy
Transfer Wheel Assembly

(62M170-950

Before performing service or maintenance operations on
unit, turn off main power switch to unit. Electrical shock
could cause personal injury.
HAMMER
USED AS
“STOP”

NOTE: Both installation and removal procedures must be performed from the pulley side of the cassette.

Weight of the installed segment will cause the wheel to
accelerate in rotation. Failure to maintain control of the
wheel rotation while installing all segments could cause
severe injury to fingers or hand caught between revolving
spokes and the bearing support beam. Handle of hammer,
or other stop, should be inserted through spokes and above
or below bearing support beams to limit rotation of unbalanced wheel. See Fig. 86.

Fig. 86 — Using a Stop on the Wheel

NOTE: The 62M040-120 units contain non-segmented wheels
which must be completely removed to be cleaned.
1. Begin by positioning one segment opening at the top of
the cassette. Unlock and open the segment retaining
brackets on both sides of the selected segment opening.
2. Holding the segment as vertical as possible and
centered between spokes, insert nose of segment downward between the hub plates. See Fig. 87.
NOTE: The face of the segment, with the imbedded
stiffener (vertical support between nose and rim end of
segment) must face the motor side of the cassette. See
Fig. 88.
3. Ease the segment downward until its outer rim clears the
inside of the wheel rim. Then press the segment inward
against the spoke flanges.
4. Close and latch segment retaining brackets to the position
shown in Fig. 89. Make certain the retaining bracket is
fully engaged under the catch.
5. Slowly rotate, by hand, the first installed segment to the
bottom of the cassette, then install the second segment
opposite the first. Repeat this sequence with the two
installed segments rotated to the horizontal position to
balance the weight of installed segments. Continue this
sequence with the remaining segments.

Fig. 87 — Inserting a Segment of the Wheel
76

2. Using hexagonal wrench, loosen setscrew in bearing
locking collar. Using light hammer and drift (in drift pin
hole) tap collar in the direction of wheel rotation to
unlock collar. Remove collar.
3. Using socket wrench with extension, remove two nuts
which secure bearing housing to the bearing support
beam. Slide bearing from shaft.
NOTE: Slight hand pressure against wheel rim will
lift weight of wheel from inner race of bearing to assist
bearing removal and installation. If not removable by
hand, use bearing puller.

Imbedded Stiffeners

Fig. 88 — Motor Side View of Segment
Protect hands and belt from possible sharp edges of hole in
bearing support beam.

CATCH

4. Using a wrench, remove diameter seal retaining screws or
hub seal retaining screws. Remove diameter seals or hub
seal from bearing beam. See Fig. 91.
5. Form a small loop of belt and pass it through the hole in
the bearing support beam. Grasp the belt at the wheel hub
and pull the entire belt down. Loop the trailing end of the
belt over the shaft (Fig. 91 shows belt partially through
the opening).
6. Reinstall the bearing onto the wheel shaft, being careful
to engage the two locating pins into the holes in the
bearing support beam. Secure the bearing with two
self-locking nuts.
7. Install the belts around the wheel and pulley according to
the instructions provided with the belt.
8. Reinstall diameter seals or hub seal and tighten retaining
screws. Rotate wheel in clockwise direction to determine
that wheel rotates freely with slight drag on seals.
9. Reinstall bearing locking collar. Rotate collar by hand in
the direction the wheel rotates (see label provided on each
cassette for wheel rotation). Lock in position by tapping
drift pin hole with hammer and drift. Secure in position
by tightening setscrew.
10. Reinstall bearing access cover.
11. Apply power to wheel and ensure that the wheel rotates
freely without interference.
ALTERNATE BELT REPLACEMENT METHODS — Alternate belt replacement methods may be used in some applications depending upon accessibility of the cassette. Consult
instructions provided with the belt for further information.

PULL TAB

Fig. 89— Latch Segment Retaining Brackets

Wheel Drive Motor and Pulley Replacement
(62M170-095 Units)
1. Disconnect power to wheel drive motor.
2. Remove belt from pulley and position temporarily around
wheel rim.
3. Loosen setscrew in wheel drive pulley using Allen
wrench and remove pulley from motor drive shaft.
4. While supporting weight of drive motor in one hand,
loosen and remove 4 mounting bolts.
5. Install replacement motor with hardware kit supplied.
6. Install pulley to dimension shown in Fig. 90 and secure
setscrew to drive shaft.
7. Stretch belt over pulley and engage in groove.

Belt Replacement
1. Obtain access to the pulley side bearing access plate.
Remove two bearing access plate retaining screws and
the access plate.

Insulation

Seal
Plate
62M
UNIT SIZE
170
225
285
330
430
550
640
750
950

ERV
WHEEL DIMENSION A
WHEEL SERIES
(in.)
ERC-3623
36
ERC-3623
36
ERC-3628
36
1/
ERC-5245
52
4
ERC-5245
52
ERC-5262
52
ERC-5262
52
ERC-6488
64
7/
16
ERC-6488
64

Dimension A

Wheel
Drive
Motor

Pulley

NOTE: The ERV wheel model number contains the wheel series number,
and is located on a label near the drive pulley. For example, ERC-5245D is
a 52 series wheel.

Fig. 90 — Pulley Location
77

Belt (Shown in
Place)

Locking
Collar
Locking
Nut (2)
Bearing
Access Plate

Bearing
Support
Beam

Wheel Rim
Wheel

Bearing
Housing

Hub (2)
Taper - Lock
Hub Collar (2)

Retaining
Screws
Set Screw
Shaft
Drift Hole
Locating Pin
PULL
FEED
Belt
Pulley
Side

Motor
Side

Fig. 91 — Belt Replacement (Diameter Seals Removed)

MAINTENANCE

To clean, gain access to the energy recovery wheel and
remove wheel. Brush foreign material from the face of the
wheel. Wash the wheel in a 5% solution of non-acid based coil
cleaner or alkaline detergent and warm water.
Soak in the solution until grease and tar deposits are
loosened.
NOTE: Some staining of the desiccant may remain and is not
harmful to performance.
Before removing, rapidly run finger across surface of wheel
to separate polymer strips for better cleaning action. Rinse
dirty solution from wheel and remove excess water before
reinstalling.

Routine maintenance of the energy recovery cassettes
includes periodic cleaning of the energy recovery wheel as well
as inspection of the air seals and wheel drive components as
follows:

Cleaning — The need for periodic cleaning of the energy
recovery wheel will be a function of operating schedule, climate and contaminants in the indoor air being exhausted, and
the outdoor air being supplied to the building.
The air exchange wheel is “self-cleaning” with respect to
dry particles due to its laminar flow characteristics. Smaller
particles pass through; larger particles land on the surface and
are blown clear as the flow direction is reversed. Any material
that builds up on the face of the wheel can be removed with a
brush or vacuum. The primary need for cleaning is to remove
oil-based aerosols that have condensed on energy transfer
surfaces.
A characteristic of all dry desiccants, such films can close
off micron sized pores at the surface of the desiccant material,
reducing the efficiency by which the desiccant can adsorb and
desorb moisture and also build up so as to reduce airflow.
In a reasonably clean indoor environment such as a school
or office building, measurable reductions of airflow or loss of
sensible effectiveness may not occur for several years. Measurable changes in latent energy transfer can occur in shorter
periods of time in applications such as moderate occupant
smoking or cooking facilities. In applications experiencing
unusually high levels of occupant smoking or oil-based aerosols such as industrial applications involving the ventilation of
machine shop areas for example, annual washing of energy
transfer may be necessary to maintain latent transfer efficiency.
Proper cleaning of the energy recovery wheel will restore latent
effectiveness to near original performance.

Do not use acid based cleaners, aromatic solvents, steam or
temperatures in excess of 170 F; damage to the wheel may
result.

Air Seals — Diameter seals are provided on each cassette
to minimize transfer of air between the counter flowing
airstreams.
To adjust diameter seals, loosen diameter seal adjusting
screws and back seals away from wheel surface (Fig. 92).
Rotate wheel clockwise until two opposing spokes are hidden
behind the bearing support beam. Using a folded piece of paper
as a feeler gage, position paper between the wheel surface and
diameter seals. Adjust seals towards wheel surface until a slight
friction on the feeler gage (paper) is detected when gage is
moved along the length of the spoke. Retighten adjusting
screws and recheck clearance with “feeler” gage.

Wheel Drive Components — The wheel drive motor
bearings are pre-lubricated and no further lubrication is necessary. Make certain air cooling ports are not blocked.
The wheel drive a pulley is secured to the drive motor shaft
by a setscrew. The setscrew is secured with removable adhesive to prevent loosening. Annually confirm setscrew is secure.
The wheel drive belt is a urethane stretch belt designed to
provide constant tension through the life of the belt. No adjustment is required. Inspect the drive belt annually for proper
tracking and tension. A properly tensioned belt will turn
the wheel immediately after power is applied with no visible
slippage during start-up.

Rotation

To
Adjust

Adjusting Screws
Feeler Gage

Fig. 92 — Diameter Seal Adjustment

Copyright 2006 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1
4
Catalog No. 536-220
Printed in U.S.A.
Form 62M-1SI
Pg 80
1-06
Replaces: New
Tab 10a 12a

START-UP CHECKLIST
A. Project Information:

Start-Up Performed By ____________________________

Name __________________________________________________
Job Name ______________________________________________
ERV Unit Designation ____________________________________
Phone Number __________________________________________
Design Information
Application
CFM
External Static Pressure
Supply Discharge
Return Discharge
Voltage/Phase
ERV Unit Part Number
Specify Rooftop Unit.
Model Number
HVAC Unit Discharge Type
Roof Curb (Option)
14-in. Tall Roof Curb
Vibration Isolation Curb
Transition (Option)
Rooftop Unit Discharge
Percent Outside Air
Transition Part Number
Inside Mounting Kit (Option)

Coupled to rooftop unit or stand-alone.

Down or horizontal (use horizontal for mated application)
Down or horizontal (use horizontal for mated application)

NOTE: Complete This Section for Coupled Applications Only
Down discharge or horizontal discharge.
Yes

No
Field install
Field install
NOTE: Complete This Section for Coupled Applications Only.
Down or horizontal discharge rooftop unit.
Outside air thru ERV unit as a percent of total rooftop unit cfm.
Field install

Yes

No
Factory installed

Electrical Disconnect (Option)
Fused
Switched
Two-Position Motorized Dampers (Option)
Outside Air Damper
Exhaust Air Damper
Economizer (Accessory for Rooftop Unit)

Yes

No
Factory installed
Factory installed

Yes

No
Factory installed
Factory installed

Yes

No
Field install

Wheel Bypass With Stop Jog Control (Option)

Yes

Stop Jog Control (Option)

Yes

Pre-Heater (Option)
kW
Temp Control
Temp and Static Pressure Control
Frost Protection (Option)

Yes

Factory installed
Factory installed

Yes

Filter Maintenance Indicator (Option)

Yes

ERV Blower Maintenance Indicator (Option)

Yes

ERV Wheel Maintenance Indicator (Option)

Yes

Airflow Monitor (Option)

Yes

ERV Control Timer (Option)
24 Volt Mounted in ERV
115 Volt Remote Mount
VAV Control (Option)

Yes

Book
Tab

NOTE: Do Not Use With Wheel Bypass Option.
Special economizers required for some rooftop units. See the price pages.
NOTE: Do Not Use With Economizer Option.
Stops the ERV wheel rotation for free-cooling.
NOTE: Use With Economizer Option.
Jogs the wheel during economizer mode to expel contaminants.

Factory installed

Low Temperature Lock Out (Option)

CO2 Sensor (Option)
Wall Mount or Duct Mount
Duct Mount With External View
For 62M040 Cabinet Only
Equipment Support
Base Rail Option
Hinged Door Option
2-in. Filters Option
Door Interlock Safety Switches
Test Port Option

NOTE: Complete This Section for Indoor Applications Only.
Removes rainhoods and adds duct flanges.

Yes

Factory installed

NOTE: Do Not Use With Pre-Heater.
Defrosts wheel with exhaust air, by shutting down OA blower.

Factory installed

Shut down ERV unit at low temperature set point.

Factory installed

Senses static pressure across OA filters (can be set for return filters).

Factory installed

Monitors OA and EA blowers and sends signal on electrical spike.

Factory installed

Monitors ERV wheel and sends signal on electrical spike.

Factory installed

Gages display static pressure across wheel for OA and exhaust air.

Factory installed
Field install

24 hour / 7 day timer mounted in ERV unit.
24 hour / 7 day timer field mounted in remote location.

Factory installed

Provides independent VFD control for both OA and exhaust air.

Field install
Field install
Yes

No
Field installed
Factory installed
Factory installed
Factory installed
Factory installed
Factory installed

Use for coupled applications.
Must be ordered when 62M040 sits on a roof curb.
Provides hinges and latches on both access doors.
Replaces the standard 1-in. filters with 2-in. high efficiency, pleated.
Cuts power to ERV unit when access doors are opened during operation.
Allows for convenient monitoring of static / airflow across ERV wheel.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
1 4
Catalog No. 536-220
Printed in U.S.A.
Form 62M-1SI
Pg CL-1
1-06
Replaces: New
1a 12a

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Carrier 62Mb Users Manual

62MD 62m-1si

62MD to the manual 11728cc6-bf0b-4b88-97a7-2aae092214b9

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