Carrier | 62E | 62E-3PD - HVACpartners

Product
Data
62E
Packaged Energy
Recovery Ventilator
350 to 25,000 cfm
a62-328
Energy recovery ventilator (ERV) units
recover energy from building exhaust
air and pre-condition ventilation air.
These units are designed to satisfy
new higher ventilation requirements
and other building codes while minimizing the cost of energy.
One-piece 62E unit provides:
• Efficiency
• Cost savings
• Dependable performance
• Easy maintenance
• AHRI (Air Conditioning, Heating, and
Refrigeration Institute) certified wheel
Features/Benefits
The 62E ERV units save on
both initial costs and
operating costs by reducing
the rooftop unit cooling load
up to 3 tons per 1000 cfm of
ventilation and by recovering
energy from exhaust air to
operate efficiently.
a62-329
Copyright 2010 Carrier Corporation
The 62E unit is available in dedicated
vertical or horizontal configurations.
The vertical configuration can be used
with the stand-alone roof curb or with
combination curbs available for all
Carrier rooftop units. The unit can be
installed on a standard roof curb for vertical supply and return, or on an optional horizontal box for side supply and return. The horizontal configuration can
be used for stand-alone duty or with a
transition accessory for connection to
rooftop units with horizontal return
airflow.
Form 62E-3PD
Features/Benefits (cont)
Advantages include:
• Standard double wall construction
on the indoor side of the energy
recovery wheel.
• Constructed of pre-painted steel
which complies with ASTM (American Society for Testing and Materials) 500-hour salt spray tests.
• Rugged desiccant-coated rotary
energy recovery wheels provide
superior sensible and latent heat
recovery efficiency.
• Energy recovery wheel is AHRI
1060 (American Heating, Refrigeration Institute) certified.
• Blowers are single-width, single-inlet
with backward inclined wheels and
use electronically commutated (EC)
motors with integral variable speed
drives. The 62EA models use forward-curved centrifugal fans with
direct-drive motors.
• ETL and ETL, Canada, listed.
• Helps meet ASHRAE (American
Society of Heating, Refrigeration,
and Air Conditioning Engineers)
Standard 62-2007 requirements.
Why an ERV Unit?
New ASHRAE requirements call for an
ever-increasing amount of outside air
to be brought into a building as a way
of diluting indoor pollutants.
This increased outside air intake can
be handled one of two ways:
1. Select an oversized rooftop unit to
handle the extreme conditions of
outside air.
2. Select an ERV unit, which can be
used to temper the outside air
before it actually enters the rooftop unit.
The ERV unit uses a rotating energy
recovery wheel that picks up warm air
from the building exhaust and transfers it to the outside airstream during
the winter. During the summer, the
heat in the outside air is transferred to
the exhaust air, which can reduce the
cooling load by 3 tons per 1,000 cfm
of outside air. Carrier offers a computer program to calculate the ongoing
related energy savings for the specific
application and location.
The bottom line: Carrier’s ERV units
meet the latest ASHRAE ventilation
requirements, save on initial costs (by
downsizing the rooftop unit), reduce
operating costs, and provide a comfortable environment.
Energy recovery ventilator wheels
are used in all Carrier ERV units.
Energy recovery wheels have desiccant permanently bonded to the wheel.
Efficiency ratings are AHRI 1060
certified.
Unit construction includes prepainted steel ERV cabinets that are
matched to the rooftop unit. Paint
complies with ASTM specifications for
500 hours of salt spray. The 62E ERV
units include eye bolts in each corner
of the cabinet for overhead rigging.
Integral blowers/motor modules
have high-efficency backward incline
fans with direct-drive, variable speed
EC motors. Carrier’s energy recovery
Table of contents
Page
Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,2
Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
AHRI Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-15
Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-18
Base Unit Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-21
Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-24
Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-28
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29,30
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31-57
Typical Control Wiring Schematics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59-62
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63-66
2
ventilator units are ETL and ETL,
Canada, listed.
Energy recovery ventilators — the
IAQ solution for today’s “tight”
buildings.
Indoor-air quality (IAQ) generally refers
to the level of pollutants inside a building. These pollutants include cigarette
smoke, carbon dioxide exhaled by
occupants, radon gas, car exhaust,
paint fumes, and odors.
Concern over increased indoor air
pollutants has been spurred by several
issues: 1) changes in new building
construction methods and retrofit of
older buildings have reduced air infiltration rates; 2) synthetic materials release
airborne particles, odors, and chemicals; and 3) rooftop systems that bring
in minimal fresh air.
In 1989, IAQ concerns caused
ASHRAE to recommend increased
ventilation for all public buildings. Simply introducing fresh air into a building,
however, is not always practical or cost
effective. Additional ventilation can
overload rooftop systems and increase
energy costs.
An ERV unit offers the best solution
to retaining the energy-conserving benefits of today’s tighter building construction while improving indoor-air
quality. Carrier’s 62E ERV unit provides increased fresh air while keeping
increased costs to a minimum. In addition, the 62E unit helps to reduce
humidity levels, which helps to prevent
deterioration of building materials and
retards the growth of mold and mildew.
Model number nomenclature
Post Wheel Heater Size
7
N
I
I
Modbus
Johnson N2
Outdoor
Air Control with Exhaust
Offset cfm
BI
VFD
Constant Outdoor Air cfm
with Building Pressure
Exhaust cfm Control
Outdoor
Air with Building Pressure
Exhaust cfm Control
LEGEND
— Backward Inclined
— Variable Frequency Drive
*Wheel diameter shown in inches.
†Wheel thinckness shown in inches.
**Number in () refers to blower quantity. Wheel diameter shown in mm.
a62-541
3
AHRI capacity ratings
62EBA AND 62E7A PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 350 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.38 inches
62ECC AND 62E2C PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 1000 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.95 inches
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
SENSIBLE
71%
76%
71%
76%
LATENT TOTAL
60%
67%
67%
73%
60%
65%
67%
71%
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
LEAKAGE RATINGS
TEST
Test 1:
Test 2:
Test 3:
PRESSURE
DIFFERENTIAL
EATR
–0.50 inches
0.00 inches
0.50 inches
7.7%
0.4%
0.0%
PURGE
OACF ANGLE OR
SETTING
0.97
N/A
1.44
N/A
1.29
N/A
TEST
Test 1:
Test 2:
Test 3:
Type: WHEEL
Nominal Airflow: 500 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.60 inches
SENSIBLE
68%
73%
68%
73%
4
–0.50 inches
0.00 inches
0.50 inches
4.8%
0.2%
0.0%
PURGE
OACF ANGLE OR
SETTING
1.10
N/A
1.27
N/A
1.41
N/A
Type: WHEEL
Nominal Airflow: 900 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 1.00 inches
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
LATENT TOTAL
60%
65%
65%
70%
60%
64%
65%
69%
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
PRESSURE
DIFFERENTIAL
EATR
–0.50 inches
0.00 inches
0.50 inches
9.9%
0.2%
0.0%
SENSIBLE
76%
81%
76%
81%
LATENT TOTAL
68%
73%
73%
78%
68%
72%
73%
76%
LEAKAGE RATINGS
LEAKAGE RATINGS
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
EATR
62ECD AND 62E2D PERFORMANCE RATINGS
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
Test 1:
Test 2:
Test 3:
PRESSURE
DIFFERENTIAL
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
62EAC AND 62E1C PERFORMANCE RATINGS
TEST
LATENT TOTAL
63%
68%
70%
74%
63%
66%
70%
72%
LEAKAGE RATINGS
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
SENSIBLE
70%
76%
70%
76%
PURGE
OACF ANGLE OR
SETTING
1.02
N/A
1.33
N/A
1.59
N/A
TEST
Test 1:
Test 2:
Test 3:
PRESSURE
DIFFERENTIAL
EATR
–1.00 inches
0.00 inches
1.00 inches
9.3%
0.7%
0.0%
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
PURGE
OACF ANGLE OR
SETTING
0.97
N/A
1.19
N/A
1.34
N/A
62ECG AND 62E2G PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 1100 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.97 inches
62EDG AND 62E3G PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 1600 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.96 inches
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
SENSIBLE
68%
71%
68%
71%
LATENT TOTAL
60%
65%
67%
70%
60%
64%
67%
69%
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
LEAKAGE RATINGS
TEST
PRESSURE
DIFFERENTIAL
EATR
Test 1:
Test 2:
Test 3:
–1.00 inches
0.00 inches
1.00 inches
8.8%
0.5%
0.0%
PURGE
OACF ANGLE OR
SETTING
0.96
N/A
1.18
N/A
1.33
N/A
TEST
Test 1:
Test 2:
Test 3:
62EDD AND 62E3D PERFORMANCE RATINGS
SENSIBLE
76%
81%
76%
81%
–1.00 inches
0.00 inches
1.00 inches
7.8%
0.4%
0.0%
PURGE
OACF ANGLE OR
SETTING
0.97
N/A
1.16
N/A
1.29
N/A
Type: WHEEL
Nominal Airflow: 1400 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 1.00 inches
LATENT TOTAL
68%
73%
73%
78%
68%
72%
73%
76%
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
LEAKAGE RATINGS
PRESSURE
DIFFERENTIAL
EATR
–1.00 inches
0.00 inches
1.00 inches
8.3%
0.6%
0.0%
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
EATR
62EEB AND 62E4B PERFORMANCE RATINGS
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
Test 1:
Test 2:
Test 3:
PRESSURE
DIFFERENTIAL
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
Type: WHEEL
Nominal Airflow: 1300 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.94 inches
TEST
LATENT TOTAL
60%
65%
67%
71%
60%
64%
67%
70%
LEAKAGE RATINGS
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
SENSIBLE
68%
72%
68%
72%
SENSIBLE
80%
83%
80%
83%
LATENT TOTAL
72%
77%
77%
81%
72%
76%
77%
80%
LEAKAGE RATINGS
PURGE
OACF ANGLE OR
SETTING
0.97
N/A
1.16
N/A
1.30
N/A
TEST
Test 1:
Test 2:
Test 3:
PRESSURE
DIFFERENTIAL
EATR
–0.50 inches
0.00 inches
0.50 inches
3.1%
0.9%
0.4%
PURGE
OACF ANGLE OR
SETTING
1.03
N/A
1.08
N/A
1.12
N/A
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
5
AHRI capacity ratings (cont)
62EED AND 62E4D PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 1300 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.94 inches
62EEG AND 62E4G PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 1600 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.96 inches
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
SENSIBLE
75%
79%
75%
79%
LATENT TOTAL
68%
72%
74%
77%
68%
71%
74%
76%
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
LEAKAGE RATINGS
TEST
Test 1:
Test 2:
Test 3:
PRESSURE
DIFFERENTIAL
EATR
–1.00 inches
0.00 inches
1.00 inches
6.0%
0.6%
0.0%
PURGE
OACF ANGLE OR
SETTING
1.00
N/A
1.14
N/A
1.24
N/A
TEST
Test 1:
Test 2:
Test 3:
Type: WHEEL
Nominal Airflow: 2200 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 1.01 inches
EATR
–1.00 inches
0.00 inches
1.00 inches
6.1%
0.4%
0.0%
PURGE
OACF ANGLE OR
SETTING
0.99
N/A
1.13
N/A
1.23
N/A
62EHB AND 62E5B PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 3000 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 1.01 inches
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
SENSIBLE
68%
74%
68%
74%
LATENT TOTAL
60%
65%
66%
71%
60%
64%
66%
70%
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
LEAKAGE RATINGS
6
PRESSURE
DIFFERENTIAL
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
62EEF AND 62E4F PERFORMANCE RATINGS
TEST
PRESSURE
DIFFERENTIAL
EATR
Test 1:
Test 2:
Test 3:
–0.50 inches
0.00 inches
0.50 inches
2.0%
0.4%
0.1%
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
LATENT TOTAL
60%
65%
67%
71%
60%
63%
67%
70%
LEAKAGE RATINGS
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
SENSIBLE
68%
74%
68%
74%
SENSIBLE
80%
83%
80%
83%
LATENT TOTAL
72%
77%
77%
81%
72%
75%
77%
79%
LEAKAGE RATINGS
PURGE
OACF ANGLE OR
SETTING
1.03
N/A
1.06
N/A
1.09
N/A
TEST
Test 1:
Test 2:
Test 3:
PRESSURE
DIFFERENTIAL
EATR
–0.50 inches
0.00 inches
0.50 inches
2.7%
1.5%
1.3%
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
PURGE
OACF ANGLE OR
SETTING
1.02
N/A
1.04
N/A
1.06
N/A
62EHD AND 62E5D PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 4600 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 1.01 inches
62EHG AND 62E5G PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 5500 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.93 inches
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
SENSIBLE
74%
79%
74%
79%
LATENT TOTAL
68%
72%
73%
77%
68%
70%
73%
75%
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
LEAKAGE RATINGS
TEST
Test 1:
Test 2:
Test 3:
PRESSURE
DIFFERENTIAL
EATR
–1.00 inches
0.00 inches
1.00 inches
4.4%
1.4%
0.5%
PURGE
OACF ANGLE OR
SETTING
1.00
N/A
1.06
N/A
1.11
N/A
TEST
Test 1:
Test 2:
Test 3:
PRESSURE
DIFFERENTIAL
EATR
–1.00 inches
0.00 inches
1.00 inches
4.0%
1.0%
0.2%
PURGE
OACF ANGLE OR
SETTING
0.99
N/A
1.06
N/A
1.10
N/A
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
62EHF AND 62E5F PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 4600 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 1.00 inches
62EKD AND 62E6D PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 4500 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.95 inches
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
SENSIBLE
68%
74%
68%
74%
LATENT TOTAL
60%
66%
66%
72%
60%
64%
66%
70%
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
LEAKAGE RATINGS
TEST
PRESSURE
DIFFERENTIAL
EATR
Test 1:
Test 2:
Test 3:
–0.50 inches
0.00 inches
0.50 inches
1.8%
0.9%
0.6%
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
LATENT TOTAL
60%
65%
67%
71%
60%
63%
67%
70%
LEAKAGE RATINGS
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
SENSIBLE
68%
73%
68%
73%
SENSIBLE
82%
85%
82%
85%
LATENT TOTAL
77%
80%
80%
83%
77%
79%
80%
82%
LEAKAGE RATINGS
PURGE
OACF ANGLE OR
SETTING
1.01
N/A
1.03
N/A
1.04
N/A
TEST
Test 1:
Test 2:
Test 3:
PRESSURE
DIFFERENTIAL
EATR
–1.00 inches
0.00 inches
1.00 inches
6.3%
3.2%
2.0%
PURGE
OACF ANGLE OR
SETTING
0.99
N/A
1.05
N/A
1.10
N/A
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
7
AHRI capacity ratings (cont)
62EKG AND 62E6G PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 7800 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.91 inches
62ELG PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 9200 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.94 inches
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
SENSIBLE
68%
73%
68%
73%
LATENT TOTAL
60%
65%
67%
70%
60%
63%
67%
70%
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
LEAKAGE RATINGS
TEST
PRESSURE
DIFFERENTIAL
EATR
Test 1:
Test 2:
Test 3:
–1.00 inches
0.00 inches
1.00 inches
3.9%
1.4%
0.5%
PURGE
OACF ANGLE OR
SETTING
0.99
N/A
1.05
N/A
1.09
N/A
TEST
Test 1:
Test 2:
Test 3:
Type: WHEEL
Nominal Airflow: 7600 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 1.02 inches
SENSIBLE
75%
79%
75%
79%
8
–1.00 inches
0.00 inches
1.00 inches
3.5%
1.2%
0.4%
PURGE
OACF ANGLE OR
SETTING
0.99
N/A
1.04
N/A
1.08
N/A
Type: WHEEL
Nominal Airflow: 6000 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.93 inches
LATENT TOTAL
69%
73%
74%
77%
69%
71%
74%
76%
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
LEAKAGE RATINGS
PRESSURE
DIFFERENTIAL
EATR
–1.00 inches
0.00 inches
1.00 inches
4.0%
1.6%
0.6%
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
EATR
62EMD PERFORMANCE RATINGS
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
Test 1:
Test 2:
Test 3:
PRESSURE
DIFFERENTIAL
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
62ELD PERFORMANCE RATINGS
TEST
LATENT TOTAL
60%
65%
67%
71%
60%
63%
67%
70%
LEAKAGE RATINGS
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
SENSIBLE
68%
73%
68%
73%
SENSIBLE
82%
85%
82%
85%
LATENT TOTAL
77%
80%
80%
83%
77%
79%
80%
82%
LEAKAGE RATINGS
PURGE
OACF ANGLE OR
SETTING
1.00
N/A
1.05
N/A
1.08
N/A
TEST
Test 1:
Test 2:
Test 3:
PRESSURE
DIFFERENTIAL
EATR
–1.00 inches
0.00 inches
1.00 inches
5.8%
2.9%
1.8%
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
PURGE
OACF ANGLE OR
SETTING
0.99
N/A
1.05
N/A
1.09
N/A
62EMG PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 10,800 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.93 inches
62ENG PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 13,800 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.97 inches
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
SENSIBLE
68%
73%
68%
73%
LATENT TOTAL
60%
65%
67%
71%
60%
63%
67%
70%
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
LEAKAGE RATINGS
TEST
PRESSURE
DIFFERENTIAL
EATR
Test 1:
Test 2:
Test 3:
–1.00 inches
0.00 inches
1.00 inches
3.4%
1.2%
0.4%
PURGE
OACF ANGLE OR
SETTING
0.99
N/A
1.04
N/A
1.08
N/A
TEST
Test 1:
Test 2:
Test 3:
Type: WHEEL
Nominal Airflow: 11,000 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 1.01 inches
SENSIBLE
75%
79%
75%
79%
–1.00 inches
0.00 inches
1.00 inches
3.1%
1.1%
0.4%
PURGE
OACF ANGLE OR
SETTING
0.99
N/A
1.04
N/A
1.08
N/A
Type: WHEEL
Nominal Airflow: 12,600 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 1.02 inches
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
LATENT TOTAL
69%
73%
74%
77%
69%
71%
74%
76%
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
PRESSURE
DIFFERENTIAL
EATR
–1.00 inches
0.00 inches
1.00 inches
3.6%
1.6%
0.8%
SENSIBLE
75%
79%
75%
79%
LATENT TOTAL
69%
73%
74%
77%
69%
71%
74%
76%
LEAKAGE RATINGS
LEAKAGE RATINGS
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
EATR
62EPD PERFORMANCE RATINGS
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
Test 1:
Test 2:
Test 3:
PRESSURE
DIFFERENTIAL
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
62END PERFORMANCE RATINGS
TEST
LATENT TOTAL
60%
65%
67%
71%
60%
63%
67%
70%
LEAKAGE RATINGS
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
SENSIBLE
68%
73%
68%
73%
PURGE
OACF ANGLE OR
SETTING
1.00
N/A
1.04
N/A
1.07
N/A
TEST
Test 1:
Test 2:
Test 3:
PRESSURE
DIFFERENTIAL
EATR
–1.00 inches
0.00 inches
1.00 inches
3.5%
1.5%
0.8%
PURGE
OACF ANGLE OR
SETTING
1.00
N/A
1.04
N/A
1.07
N/A
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
9
AHRI capacity ratings (cont)
62EPG PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 15,000 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.92 inches
62ERG PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 17,000 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.87 inches
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
SENSIBLE
68%
63%
68%
63%
LATENT TOTAL
60%
65%
67%
71%
60%
65%
67%
71%
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
LEAKAGE RATINGS
TEST
PRESSURE
DIFFERENTIAL
EATR
Test 1:
Test 2:
Test 3:
–1.00 inches
0.00 inches
1.00 inches
3.2%
1.2%
0.5%
PURGE
OACF ANGLE OR
SETTING
1.00
N/A
1.04
N/A
1.06
N/A
TEST
Test 1:
Test 2:
Test 3:
SENSIBLE
74%
79%
74%
79%
Type: WHEEL
Nominal Airflow: 16,500 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 1.00 inches
LATENT TOTAL
71%
73%
71%
78%
71%
73%
71%
77%
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
LEAKAGE RATINGS
0.00 inches
0.50 inches
1.00 inches
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
10
1.9%
0.7%
0.4%
PURGE
OACF ANGLE OR
SETTING
1.01
N/A
1.03
N/A
1.04
N/A
62ESD PERFORMANCE RATINGS
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
Test 1:
Test 2:
Test 3:
EATR
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
Type: WHEEL
Nominal Airflow: 1300 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.94 inches
PRESSURE
DIFFERENTIAL
PRESSURE
DIFFERENTIAL
0.00 inches
0.50 inches
1.00 inches
62ERD PERFORMANCE RATINGS
TEST
LATENT TOTAL
60%
63%
66%
69%
60%
62%
66%
68%
LEAKAGE RATINGS
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
SENSIBLE
64%
71%
64%
71%
EATR
2.2%
0.6%
0.7%
SENSIBLE
74%
79%
74%
79%
LATENT TOTAL
71%
73%
71%
78%
71%
73%
71%
77%
LEAKAGE RATINGS
PURGE
OACF ANGLE OR
SETTING
1.02
N/A
1.04
N/A
1.04
N/A
TEST
Test 1:
Test 2:
Test 3:
PRESSURE
DIFFERENTIAL
0.00 inches
0.50 inches
1.00 inches
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
EATR
2.3%
0.7%
0.8%
PURGE
OACF ANGLE OR
SETTING
1.01
N/A
1.04
N/A
1.04
N/A
62ESG PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 20,000 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.86 inches
62ETG PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 21,700 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.86 inches
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
SENSIBLE
64%
71%
64%
71%
LATENT TOTAL
60%
63%
66%
69%
60%
62%
66%
68%
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
LEAKAGE RATINGS
PRESSURE
DIFFERENTIAL
TEST
Test 1:
Test 2:
Test 3:
0.00 inches
0.50 inches
1.00 inches
EATR
2.0%
0.7%
0.5%
PURGE
OACF ANGLE OR
SETTING
1.01
N/A
1.03
N/A
1.04
N/A
TEST
Test 1:
Test 2:
Test 3:
0.00 inches
0.50 inches
1.00 inches
62ETD PERFORMANCE RATINGS
SENSIBLE
74%
79%
74%
79%
0.00 inches
0.50 inches
1.00 inches
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
1.9%
0.7%
0.4%
PURGE
OACF ANGLE OR
SETTING
1.01
N/A
1.03
N/A
1.04
N/A
Type: WHEEL
Nominal Airflow: 20,500 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 1.01 inches
LATENT TOTAL
71%
73%
75%
78%
71%
73%
75%
77%
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
LEAKAGE RATINGS
Test 1:
Test 2:
Test 3:
EATR
62EUD PERFORMANCE RATINGS
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
PRESSURE
DIFFERENTIAL
PRESSURE
DIFFERENTIAL
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
Type: WHEEL
Nominal Airflow: 18,000 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 1.01 inches
TEST
LATENT TOTAL
60%
63%
66%
69%
60%
62%
66%
68%
LEAKAGE RATINGS
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
SENSIBLE
64%
71%
64%
71%
EATR
2.2%
0.6%
0.7%
SENSIBLE
74%
79%
74%
79%
LATENT TOTAL
71%
73%
75%
78%
71%
73%
75%
77%
LEAKAGE RATINGS
PURGE
OACF ANGLE OR
SETTING
1.01
N/A
1.04
N/A
1.04
N/A
TEST
Test 1:
Test 2:
Test 3:
PRESSURE
DIFFERENTIAL
0.00 inches
0.50 inches
1.00 inches
EATR
2.1%
0.6%
0.7%
PURGE
OACF ANGLE OR
SETTING
1.01
N/A
1.04
N/A
1.04
N/A
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A
— Not Applicable
OACF — Outdoor Air Correction Factor
11
AHRI capacity ratings (cont)
62EUG PERFORMANCE RATINGS
Type: WHEEL
Nominal Airflow: 25,000 cfm
Tilt Angle (Heating/Cooling): N/A Degrees
Pressure Drop: 0.87 inches
THERMAL EFFECTIVENESS RATINGS AT
0 in. PRESSURE DIFFERENTIAL
100% Airflow Heating Condition:
75% Airflow Heating Condition:
100% Airflow Cooling Condition:
75% Airflow Cooling Condition:
SENSIBLE
64%
71%
64%
71%
LATENT TOTAL
60%
63%
66%
69%
60%
62%
66%
68%
LEAKAGE RATINGS
TEST
Test 1:
Test 2:
Test 3:
PRESSURE
DIFFERENTIAL
0.00 inches
0.50 inches
1.00 inches
LEGEND
EATR — Exhaust Air Transfer Ratio
N/A — Not Applicable
OACF — Outdoor Air Correction Factor
12
EATR
1.8%
0.6%
0.4%
PURGE
OACF ANGLE OR
SETTING
1.01
N/A
1.03
N/A
1.04
N/A
Physical data
UNIT 62E
NOMINAL CAPACITY (cfm)
CAPACITY RANGE (cfm)
MAXIMUM SHIPPING WEIGHT (lb)
MAXIMUM OPERATING WEIGHT (lb)
UNIT DIMENSIONS (in.)
Length (includes hoods)
Width
Height
ROTARY ENERGY EXCHANGER
Type
Size (Diam x Depth) (in.)
Nominal Drive Motor Hp
SUPPLY/EXHAUST FANS
Type
Drive Type
Fan Option Code
(see fan option table)
FILTERS
Type
Exhaust Air – Qty...Size (L x W x D) (in.)
Outside Air – Qty...Size (L x W x D) (in.)
UNIT 62E
NOMINAL CAPACITY (cfm)
CAPACITY RANGE (cfm)
MAXIMUM SHIPPING
WEIGHT (lb)
MAXIMUM OPERATING
WEIGHT (lb)
UNIT DIMENSIONS (in.)
Length (includes hoods)
Width
Height
ROTARY ENERGY
EXCHANGER
Type
Size (Diam x Depth) (in.)
Nominal Drive Motor Hp
SUPPLY/EXHAUST FANS
Type
Drive Type
Fan Option Code
(see fan option table)
FILTERS
Type
Exhaust Air – Qty...Size
(L x W x D) (in.)
Outside Air – Qty...Size
(L x W x D) (in.)
BA/7A
350
200-800
331
281
BC/7C
500
200-900
336
286
CC/2C
1000
500-1150
488
438
44.2/48.9
31.1/36.4
34.6/31.2
19 x 1.0
0.09
CG/2G
1100
500-1400
502
452
DD/3D
1300
600-1600
627
577
61.8/57.5
38.6/43.9
42.1/38.7
Monolithic
19 x 2.0
0.09
DG/3G
1600
800-2000
627
577
67.6/57.3
44.4/49.7
41.9/44.5
Segmented
25 x 2.0
0.09
Centrifugal DWDI
Direct
A
CD/2D
900
400-1100
502
452
25 x 3.0
0.09
30 x 3.0
0.09
Backward Inclined, Single Width Single Inlet
EC Motor with Integral Frequency Drive
A, B
1...12 x 24 x 2
1...12 x 24 x 2
C
C
2 in. Pleated
1…14 x 25 x 2
1…14 x 25 x 2
2…16 x 25 x 2
2…16 x 25 x 2
EB/4B
1,400
8001,800
ED/4D
2,200
1,1002,600
EF/4F
2,200
1,3002,700
EG/4G
2,600
1,3003,500
HB/5B
3,000
1,4003,600
HD/5D
4,600
2,2005,600
HF/5F
4,600
2,2005,400
HG/5G
5,500
3,0007,400
KD/6D
4,500
2,5005,500
KG/6G
7,800
4,00010,500
1,120
1,158
1,120
1,158
1,739
1,771
1,739
1,771
2,550
2,550
1,070
1,108
1,070
1,108
1,689
1,721
1,689
1,721
2,300
2,300
85.5/70.8
54.6/59.9
50.5/54.7
36 x 1.5
1/6
36 x 3.0
1/6
36 x 1.5
1/6
103.9/80.1
67.0/72.3
55.9/67.1
36 x 3.0
1/6
Segmented
52 x 1.5
52 x 3.0
1/6
114.5/86.1
77.6/82.9
61.9/77.7
52 x 1.5
52 x 3.0
1/6
64 x 3.0
1/4
Backward Inclined, Single Width Single Inlet
EC Motor with Integral Frequency Drive
C, E
E, F
E, F, L
E, F, L, M
F, L, M
2 in. Pleated
2…20 x 25 x 2
3…20 x 25 x 2
6…16 x 24 x 2
2…20 x 25 x 2
3…20 x 25 x 2
6…16 x 24 x 2
LEGEND
DWDI — Double Width, Double Inlet
EC
— Electronically Commutated
13
Physical data (cont)
UNIT 62E
NOMINAL CAPACITY (cfm)
CAPACITY RANGE (cfm)
MAXIMUM SHIPPING
WEIGHT (lb)
MAXIMUM OPERATING
WEIGHT (lb)
UNIT DIMENSIONS (in.)
Length (includes hoods)
Width
Height
ROTARY ENERGY
EXCHANGER
Type
Size (Diam x Depth) (in.)
Nominal Drive Motor Hp
SUPPLY/EXHAUST FANS
Type
Drive Type
Fan Option Code
(see fan option table)
FILTERS
Type
Exhaust Air – Qty...Size
(L x W x D) (in.)
Outside Air – Qty...Size
(L x W x D) (in.)
LD
LG
7,600
9,200
3,500-9,000 5000-12,000
2,715
2,883
3,079
3,079
3,267
3,267
3,381
3,545
2,465
2,633
2,829
2,829
3,017
3,017
3,131
3,295
92.7
85.1
66.4
99.7
92.1
67.4
68 x 3.0
1/4
74 x 3.0
1/4
105.7
98.1
68.4
110.7
103.1
71.8
81 x 3.0
1/4
86 x 3.0
1/4
Backward Inclined, Single Width Single Inlet
EC Motor with Integral Frequency Drive
F, G, L, M
F, G, M
F, G, M
F, G, M
G, M
F, G, M
G, M
2 in. Pleated
CAPACITY RANGE (cfm)
6…16 x 25 x 2
6…18 x 25 x 2
8…20 x 20 x 2
8…20 x 24 x 2
6…16 x 25 x 2
6…18 x 25 x 2
8…20 x 20 x 2
8…20 x 24 x 2
RD
13,800
7,00017,000
RG
17,000
9,00024,000
SD
16,500
8,00020,000
SG
20,000
11,00029,000
TD
18,000
9,00022,000
TG
21,700
12,00031,000
UD
20,500
10,00025,000
UG
25,000
14,00036,000
4351
4351
4688
4688
5481
5481
5481
5481
4101
4101
4438
4438
5231
5231
5231
5231
118.7
111.1
71.8
122.7
115.1
75.8
92 x 3.0
1/3
99 x 3.0
1/3
129.7
122.1
81.4
135.7
128.0
83.4
104 x 3.0
1/3
110 x 3.0
1/3
Segmented
G, H, J, M,
N
LEGEND
DWDI — Double Width, Double Inlet
EC
— Electronically Commutated
14
MG
ND
NG
PD
PG
10,800
11,000
13,800
12,600
15,000
5500-14,500 5500-13,500 7000-17,500 6000-15,500 7500-20,000
Segmented
UNIT 62E
NOMINAL CAPACITY (cfm)
MAXIMUM SHIPPING
WEIGHT (lb)
MAXIMUM OPERATING
WEIGHT (lb)
UNIT DIMENSIONS (in.)
Length (includes hoods)
Width
Height
ROTARY ENERGY
EXCHANGER
Type
Size (Diam x Depth) (in.)
Nominal Drive Motor Hp
SUPPLY/EXHAUST FANS
Type
Drive Type
Fan Option Code
(see fan option table)
FILTERS
Type
Exhaust Air – Qty...Size
(L x W x D) (in.)
Outside Air – Qty...Size
(L x W x D) (in.)
MD
6,000
3000-7500
G, H, J, N
Backward Inclined, Single Width Single Inlet
EC Motor with Integral Frequency Drive
H, K, J,
K, J, N, P, R
H, J, K, N
N, P, R
H, K, J, N, P, R
2 in. Pleated
10…20 x 20 x 2
8…24 x 24 x 2
8…25 x 25 x 2
8…25 x 25 x 2
10…20 x 20 x 2
8…24 x 24 x 2
8…25 x 25 x 2
8…25 x 25 x 2
SUPPLY/EXHAUST FAN OPTION TABLE
FAN OPTION CODE
Wheels
Qty...Width (in.)
Nominal Motor Hp
(per each fan)
FAN OPTION
CODE
Wheels
Qty...Width (in.)
Nominal Motor Hp
(per each fan)
A
B
C
E
F
G
H
1…5 x 4 1/8
2…5 x 4 1/8
1…15 3/4
1…19 3/4
2…19 3/4
3…19 3/4
4…19 3/4
0.61
0.61
1.18
3.62
3.62
3.62
3.62
J
K
L
M
N
P
R
S
5…19 3/4
6…19 3/4
1…24 3/4
2…24 3/4
3…24 3/4
7…19 3/4
8…19 3/4
1…9 7/8
3.62
3.62
3.89
3.89
3.89
3.62
3.62
3.62
15
Options and accessories
ITEM
OPTION
Total Energy Recovery Wheel
ACCESSORY
X (Std)
Sensible Energy Recovery Wheel
X
Total Energy Recovery Wheel with Mechanical Purge (3-in. wheels only)
X
EzERV - Constant Volume Supply and Exhaust with Manual Offset Air Control
X
EzERV - Modulating Supply with CO2 Control with Exhaust Air Tracking and Manual Offset
X
EzERV - Constant Volume Supply, Modulating Exhaust with Building Pressure Control
X
EzERV - Modulating Supply with CO2 Control, Modulating Exhaust with Building Pressure Control
X
BACnet* Communication Interface
X
LON Communication Interface
X
Pre-Heaters (for frost protection)
X
Post-Heaters (for supply air heating)
X
Three-Stage Electric Heater Control (for pre-heaters or post-heaters)
X
Frost Protection
X
ERV Modulating Wheel Frost Protection
X
Low Temperature Lockout
X
Electrical Disconnects
X
ERV Filter Maintenance Indicators
X
ERV Wheel and Blower Maintenance Indicators
X
Motorized Dampers
X
Rooftop Economizer Option, Shutdown ERV
X
Rooftop Economizer Option, ERV Provides Power Exhaust Air Relief
X
ERV Remote Timer
X
Remote Readout
X
Roof Curb
X
Combination ERV-RTU Roof Curb
X
Drop-in Damper Box
X
ERV-to-Rooftop Unit Transition (horizontal return RTUs)
X
Horizontal Supply and Return ERV Base
X
ComfortLink™ Interface Device
X
LEGEND
ERV — Energy Recovery Ventilator
RTU — Rooftop Unit
*Sponsored by ASHRAE (American Society of Heating, Refrigerating,
and Air Conditioning Engineers).
Energy recovery wheel factory-installed
options
variable speed motors will modulate to maintain the programmable airflow set points. Dirty filters and system
effect will not affect the unit airflow, provided the ERV fans
can overcome the system static pressures.
Total recovery energy wheel (standard) — The heat
recovery wheel utilizes a polymer film matrix with a silica
gel desiccant coating to transfer both sensible and latent
energy between the exhaust and ventilation air. The silica
gel desiccant provides optimal latent energy transfer when
the relative humidity of the airstream is above 30%.
Sensible energy recovery wheel — The heat recovery
wheel utilizes a polymer film matrix to transfer sensible
energy between the exhaust and ventilation air.
Total recovery energy wheel with mechanical purge
— A mechanical purge sector with an adjustable angle may
be used to limit the exhaust air transfer (carry-over) to less
than 1%. This option is only available on 3-in. wheel
options.
EzERV control factory-installed options — For applications where the ERV unit is to be run based on airflow
rates, an EzERV control option should be ordered. With
the EzERV control option, the outside air and exhaust air
volumes are measured and displayed on a LCD (liquid crystal diode) screen located inside the ERV cabinet. The
16
EzERV configurations
Constant volume supply and exhaust with manual
offset air control — The desired outside air cfm is programmed at the unit control panel. The offset between outside air cfm and exhaust air cfm is also programmed. This
allows the user to help control building pressure without
additional building pressure controls.
Modulating supply with CO2 control with exhaust
air tracking and manual offset — The outside air
blower(s) are modulated based on return air CO2 level. The
user will program minimum/maximum cfm levels and minimum/maximum CO2 levels inside with the EzERV user
interface. The outside air cfm will now modulate between
the maximum/minimum cfm settings based on the CO2
levels inside the building. The offset between outside air
cfm and exhaust air cfm is also programmed and the
exhaust blower(s) will modulate to maintain the differential
set point. A CO2 sensor is included with this option.
Constant volume supply with modulating ehaust
and building pressure control — The desired outside
air cfm is programmed at the unit control panel. The
exhaust blower(s) are modulated based on building pressure. The user will program a building pressure set point
with the EzERV user interface. A building static pressure
sensor is included with this option.
Modulating supply with CO2 control and modulating exhaust with building pressure control — The
outside air blower(s) are modulated based on return air
CO2 level. The user will program minimum/maximum cfm
levels and minimum/maximum CO2 levels inside with the
EzERV user interface. The outside air cfm will now modulate between the maximum/minimum cfm settings based
on the CO2 levels inside the building. The exhaust
blower(s) are modulated based on building pressure. The
user will program a building pressure set point with the
EzERV user interface. A CO2 sensor and building static
pressure sensor are included with this option.
Communication factory-installed options
BACnet communication interface — Provides remote
communication access to the 62E control logic via BACnet
protocol.
LON communication interface — Provides remote
communication access to the 62E control logic via LON
protocol.
ComfortLink™ communication interface — Provides a control interface between the 62E and a Carrier
rooftop unit using the ComfortLink DDC (direct digital
controls) control system. This interface allows for optimal
system operation by sharing unit data and properly coordinating energy recovery, economizer, and power exhaust
operation.
Factory-installed options
Pre-heaters — Some climates may dictate the use of an
electric pre-heater to warm the outside air before it enters
the ERV unit. This prevents frost build-up on the ERV
wheel. Refer to the Carrier E-cat selection software for
details. Pre-heaters are factory-installed into the unit. A
static pressure sensor detects static increase on the ERV
wheel due to frost build-up. This activates the pre-heater if
temperature is below its set point and static is detected
across the ERV wheel.
Post-heaters — With stand-alone and some coupled
applications, it may be desirable to ensure a minimum air
temperature for air being supplied by the ERV. The electric
post-heaters are installed on the leaving side of the energy
recovery wheel.
Three-stage heater control — Standard pre-heaters
and post-heaters are single stage. Pre-heaters are controlled based on an outdoor air temperature set point and
post-heaters are controlled based on a minimum air temperature leaving the energy recovery wheel. The threestage heater control option provides two additional set
points to allow incremental heater capacity control based
on the outdoor or wheel discharge air temperature.
Frost protection — Applications with extremely cold climates may use the frost protection option as a means of
eliminating frost build-up on the ERV wheel. Refer to the
Carrier E-cat selection software to determine if required.
When frost builds up on the ERV wheel, the outside air
blower is temporarily shut off and the warmer exhaust air
"defrosts" the wheel. Once the frost build-up is eliminated,
the outside air blower is reactivated.
ERV modulating wheel frost protection — Applications with extremely cold climates may use the frost protection option as a means of eliminating frost build-up on the
ERV wheel. Refer to the Carrier E-cat selection software to
determine if required. When frost builds up on the ERV
wheel, the ERV wheel is temporarily slowed down, making
the ERV air "defrost" the wheel. Once the frost build-up is
eliminated, the ERV wheel returns to normal speed.
Low temperature lockout — For applications where
the ERV unit is to be locked out in extremely cold temperatures, the low temperature lockout option should be used.
When outside air temperature is below set point the ERV
unit is completely shutdown. The thermostat range can go
down to – 30 F and is user controlled.
Electrical disconnects — Factory-installed electrical
disconnects are available for most ERV units. Disconnects
are sized to handle the ERV unit and pre-heater (when
ordered together). Both non-fused and fused disconnects
are available.
ERV filter maintenance indicators — The ERV monitors pressure drop across the outside air intake filters and
the exhausts air filters. As filters get dirty a rising static
pressure across the dirty filter will initiate an alarm. The
ERV LCD displays that the filter needs to be replaced and a
dry contact is closed, which can be connected to a building
management system if present.
ERV wheel and blower maintenance indicators —
This option monitors the ERV wheel for movement, and
the outside air and the exhaust air blowers/motors. If the
ERV wheel is enabled and no movement occurs, of if there
is a problem detected with either blower, the ERV LCD displays that the wheel or blower needs to be serviced and a
dry contact is closed, which can be connected to a building
management system if present.
Motorized dampers — Two-position motorized outside
air and exhaust air dampers are available to eliminate
unwanted outside air into the building space when the ERV
unit is off. Motors are factory-installed and wired.
Rooftop economizer option, shutdown ERV —
When used in conjunction with the rooftop unit's economizer this option will completely shut down the ERV when
the rooftop unit goes into free cooling.
Rooftop economizer option with power relief —
When used in conjunction with the rooftop unit's economizer this option will turn off the ERV outside air blower,
keep the ERV exhaust blower on, and energize the ERV
wheel periodically to prevent contamination build-up on
the ERV wheel, during the "free-cooling" operation of the
HVAC (heating, ventilation, and air conditioning) unit.
Field-installed accessories
ERV remote timer — If the ERV unit is to be activated at
only certain times of the day or week, the ERV control
17
Options and accessories (cont)
timer option may be used. This 115-v timer is to be fieldmounted and wired.
Remote readout — The remote readout panel offers a
convenient means for monitoring the ERV status from a
remote location.
Roof curb — Roof curbs are constructed of heavy gage
galvanized steel and include a wood nailer and gasketing
package for a tight unit-to-curb seal. Insulated deck pans
and duct supports are provided. For stand-alone down discharge units, ductwork can slide into supply and return
openings and hang from the top of the curb. The standard
curb is 14 in. tall and is manufactured to NRCA (National
Roofing Contractors Association) specifications.
Combination ERV-RTU roof curb — The combination
curb is a single curb that holds both the rooftop unit and
the ERV on the same curb. The transition of the air happens in transitions within the curb. The combination curb
allows for ease of set-up and installation at the jobsite. Only
one curb has to be set as opposed to setting 2 curbs and a
transition. The proper distance will always be set between
the HVAC unit and the ERV. The combination curbs are
designed to allow the standard HVAC economizers and
powered exhaust to be installed in the rooftop units. Combination curbs are available to mate any ERV to any
Carrier rooftop unit that has a vertical return.
18
Drop-in damper box — Drop-in damper boxes can be
used in place of the combination curb with vertical return
rooftop units. The damper box would be installed in the
HVAC curb return chamber. The contractor would then
make two duct runs under the roof. One would be from the
supply side of the ERV to the supply side of the damper
box. The second would be from the return side of the ERV
to the return side of the damper box. A maximum duct
length of 100 ft equivalent duct per run between the ERV
and the damper box is recommended. This configuration
allows for the ERV to be located on any side of the HVAC
unit.
ERV-to-rooftop unit transition — The ERV-to-rooftop
unit transitions are available to connect the 62E ERV unit
directly to Carrier packaged rooftop units with horizontal
return configurations. Each transition is custom designed
to connect a specific ERV unit to a specific Carrier packaged rooftop unit. Transitions are shipped fully assembled
and are constructed of pre-painted steel to match the finish
of the HVAC unit and the ERV unit. One in., 2-lb insulation is factory installed.
Horizontal supply and return ERV base — The standard ERV configuration has bottom return and discharge
openings. When horizontal return and discharge connections are desired the optional horizontal base must be used.
This base may be used in conjunction with the ERV-torooftop transitions or for stand-alone applications.
Base unit dimensions
62EB-62EK VERTICAL UNIT CABINET DIMENSIONS
LEFT SIDE
a62-330
TOP VIEW
B
A
31.138
B
36.000
C
36.000
D
37.645
DIMENSIONS (in.)
E
F
34.559
5.850
C
38.625
18.000
36.000
45.183
42.078
D
44.425
18.000
45.000
45.043
41.938
E
54.625
20.000
55.000
53.562
H
67.045
20.000
65.000
K
77.625
27.000
75.000
62E UNIT
TYPE
G
5.757
H
35.076
I
24.971
J
11.801
8.916
14.239
43.875
32.471
15.485
8.916
14.239
49.675
38.271
18.260
50.458
11.677
19.165
59.875
48.495
22.997
59.022
55.918
11.677
25.164
72.294
60.915
29.207
64.972
61.868
11.677
25.164
82.875
71.495
34.247
NOTES:
1. Clearance above cabinet is 24 inches.
2. Dimensions are in inches.
19
Base unit dimensions (cont)
62E2-62E7 HORIZONTAL UNIT CABINET DIMENSIONS
FIELD TERMINAL STRIP
ACCESS
OUTSIDE AIR
HOOD
"D"
DUCT O.D.
WHEEL AND FILTER
ACCESS
EXHAUST
HOOD
DUCT CONNECTION
SPACE
SEE NOTE
"A"
CLEARANCE
"B"
CLEARANCE
ROOF CURB
"C"
NOTE:
PLEASE SIZE ROOF CURB TO ALLOW FOR A CLEARANCE
OF 10 IN. (MINIMUM) BETWEEN THE BOTTOM OF THE EXHAUST
HOOD AND THE VERY TOP OF THE INSULATED ROOF MATERIAL.
DISCONNECT
LOCATION
"E"
OUTSIDE AIR
HOOD
36.000
CLEARANCE
EXHAUST
HOOD
DUCT CONNECTION
SPACE IF NO HOODS
ROOF CURB
"F"
"I"
"G"
"J"
"D" - 2.000
DUCT I.D.
S/A
"K"
DUCT I.D.
R/A
"K"
DUCT I.D.
"D"
DUCT O.D.
"H"
ONLY DUCT SLEEVE AND
ERV AIR DIVIDER SHOWING
7
A
36.000
B
36.000
C
1.869
D
28.995
DIMENSIONS (in.)
E
F
G
31.734
36.375
32.176
H
31.186
I
11.984
J
36.905
K
12.813
2
18.000
36.000
1.179
36.495
39.171
43.875
39.663
38.673
16.215
41.239
16.497
3
18.000
40.000
3.795
42.295
44.847
49.675
45.463
44.473
16.215
41.099
19.272
4
18.000
50.000
4.238
52.495
55.066
59.875
55.673
54.673
21.132
49.631
23.997
5
24.000
64.000
4.516
64.915
67.486
72.295
68.093
67.093
27.131
53.013
30.207
6
18.000
75.000
9.542
75.495
78.066
82.875
78.673
77.673
27.131
58.963
35.247
62E UNIT TYPE
NOTES:
1. Clearance above cabinet is 24 inches.
2. Dimensions are in inches.
3. Size the roof curb to allow for a clearance of 10-in. (254 mm) (minimum) between
the bottom of the exhaust hood and the top of the insulated roof material.
20
62EL-62EU UNIT CABINET DIMENSIONS
LEFT SIDE
a62-331
TOP VIEW
CABINET DIMENSIONS
DIMENSIONS (in.)
62E UNIT
TYPE
A
B
C
H
I
J
K
L
M
N
92.747
L
82.750
30.000
85.000
85.536
76.471
36.985
69.500
66.396
85.076
M
89.750
30.000
95.000
92.536
83.471
40.485
70.500
67.396
92.076
99.747
N
95.750
30.000
97.000
98.536
89.471
43.485
71.500
68.396
98.076
105.747
P
100.750
32.000
105.000
103.536
94.471
45.985
74.910
71.806
103.076
110.747
R
108.750
32.000
115.000
111.536
102.471
49.985
74.910
71.806
111.076
118.747
S
112.750
32.000
115.000
115.536
106.471
51.985
78.910
75.806
115.076
122.747
T
119.750
32.000
122.000
122.536
113.471
55.485
84.490
81.386
122.076
129.747
U
125.625
32.000
125.000
130.875
119.495
58.497
86.510
83.405
127.971
135.727
NOTES:
1. Clearance above cabinet is 36 inches.
2. Dimensions are in inches.
21
Accessory dimensions
62EB-62EU UNIT KNOCK-DOWN CURB DIMENSIONS
"B"
TYP. 2X
"A"
I.D.
"C"
TYP. 2X
"A"
I.D.
14.000
a62-332
NOTES:
1. All dimensions shown in inches.
2. Nailer sits even with top of curb. Do not cover any existing holes with nailer.
62E
DIMENSION DIMENSION DIMENSION
UNIT
A (in.)
B (in.)
C (in.)
TYPE
B
27.221
24.721
10.861
22
62E
DIMENSION DIMENSION DIMENSION
UNIT
A (in.)
B (in.)
C (in.)
TYPE
M
85.721
83.221
40.111
C
34.721
32.221
14.611
N
91.721
89.221
43.111
D
40.521
38.021
17.511
P
96.721
94.221
45.611
E
50.721
48.221
22.611
R
104.721
102.221
49.611
H
63.141
60.641
28.821
S
108.721
106.221
51.611
K
73.721
71.221
34.111
T
115.721
113.221
55.111
L
78.721
76.221
36.611
U
121.721
119.221
58.111
62E2-62E7 HORIZONTAL UNIT KNOCK-DOWN CURB DIMENSIONS
"D"
A
A
"C"
ERV RAIL SITS DOWN
IN CHANNEL
.500
"B" I.D.
"B" I.D.
.941
B
DETAIL B
SCALE 1 : 3
SECTION A-A
14.559
"A"
"E"
7
A
28.286
DIMENSIONS (in.)
B
C
D
10.143 31.397 36.927
E
33.816
2
35.882
13.941
38.993
40.446
37.335
3
41.682
16.841
44.793
40.306
37.195
4
51.882
21.941
54.993
48.826
45.715
5
64.302
28.151
67.413
54.286
51.175
6
74.882
33.441
77.993
60.236
57.125
62E UNIT
TYPE
a62-442
NOTE: Dimensions are in inches.
23
Accessory dimensions (cont)
62EB-62EU UNIT HORIZONTAL DISCHARGE BOX DIMENSIONS
a62-333
62E UNIT
TYPE
B
C
D
E
H
K
L
M
N
P
R
S
T
U
A
27.221
34.721
40.521
50.721
63.141
72.721
78.721
85.721
91.721
96.721
104.721
108.721
115.721
115.721
NOTE: Dimensions are in inches.
24
B
12.111
15.861
18.761
23.861
30.071
34.861
37.861
41.361
44.361
46.861
50.861
52.861
56.361
56.361
DIMENSIONS (in.)
C
8.750
12.500
15.400
20.500
26.710
31.500
34.500
38.000
41.000
43.500
47.500
49.500
53.000
53.000
D
14.000
14.000
18.000
21.000
24.000
26.022
26.022
26.022
31.011
33.052
33.052
35.110
35.110
35.110
E
22.604
22.604
26.600
29.604
32.604
34.637
34.637
34.637
39.615
41.682
41.682
43.769
43.769
43.769
Typical installation
DOWN DISCHARGE COMBINATION CURB
HVAC UNIT
ENERGY
RECOVERY
UNIT
COMBINATION CURB
a62-334
HORIZONTAL DISCHARGE INSTALLATION
RETURN AIR OPENING
ENERGY RECOVERY UNIT
HVAC UNIT
HORIZONTAL
TRANSITION
a62-443
SUPPLY OPENING
25
26
ERV
STAND
ENERGY RECOVERY UNIT
ROOFTOP UNIT
DOWN DISCHARGE ROOFTOP UNIT WITH DOWN DISCHARGE ERV
RTU
STAND
Typical installation (cont)
a62-513
DROP-IN DAMPER BOXES
a62-335
a62-336
27
Typical installation (cont)
HORIZONTAL DISCHARGE TRANSITION UNIT WITH ERV
ENERGY
RECOVERY UNIT
HVAC UNIT
RETURN
AIR OPENING
HO
R
TR IZO
AN NT
SIT AL
IO
N
a62-337
28
SUPPLY AIR OPENING
HORIZONTAL
DISCHARGE
BOX
Selection procedure
62E ERV selection software
The 62E energy wheel selection and performance analysis
software simplifies the selection process. The software
details energy recovered in both summer and winter operation. It provides leaving-air temperatures and system size
reduction data for use in the selection of the primary rooftop equipment. In addition, it offers an energy saving
analysis tool using ASHRAE bin weather data. Costsavings data provided along with the designer’s building
load and equipment cost information allows for a complete
payback or life-cycle cost analysis.
Manual selection procedure
I Application requirements:
Obtain the building load breakdown from the design
engineer. Determine the design ventilation and
exhaust airflows and temperatures for both winter
and summer conditions. For example:
Given:
Ventilation Airflow . . . . . . . . . . . . . . . . 3500 cfm
Exhaust Airflow. . . . . . . . . . . . . . . . . . . 3500 cfm
Unit Voltage . . . . . . . . . . . . . . . . . . . . . 460-3-60
Design Outdoor Air Temperature,
Summer . . . . . . . . . . . . . . . . 90 F db, 74 F wb
Winter . . . . . . . . . . . . . . . . . . . . . . . . .–7 F db
Indoor (Return) Air Temperature,
Summer . . . . . . . . . . . . . . . . 79 F db, 63 F wb
Winter . . . . . . . . . . 70 F db, 53 F wb, 30% RH
Minimum Required Energy Recovery Efficiency,
Summer . . . . . . . . . . . . . . . . . . . . . . . . . . 60%
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . 60%
External Static Pressure (ESP),
Exhaust. . . . . . . . . . . . . . . . . . . . . .0.75 in. wg
Ventilation (supply). . . . . . . . . . . . . .0.20 in. wg
NOTE: Ventilation ESP varies by installation type.
See below.
Combination Curbs: When the 62E is installed on
a combination curb with the rooftop unit (RTU), use
0.20 in. wg for the supply fan section ESP.
Horizontal Transition: When the 62E is installed
on a horizontal base and uses a factory horizontal
transition kit to attach to the RTU, use 0.20 in. wg
for the supply fan section ESP.
Drop-box: When the 62E is installed on a standard
roof curb and is connected to the RTU using the
drop-box accessory and field-installed ductwork, the
supply ESP must be calculated. For the supply ESP
use the sum of the duct losses between the ERV and
drop-in damper box plus 0.10 in. wg for the drop-in
damper box loss.
II Determine the 62E unit size.
Refer to the 62E capacity range charts on pages 31
and 32 to determine which ERV wheels are capable
of handling the required airflow.
For example:
ERV wheels EG, HB, HD, HF, HG, KD, LD, or MD
could be used for 3500 cfm.
Refer to the tables for each of these wheels found
on pages 34-36. Select the 62E wheel that most
closely matches the required efficiency.
For example:
The HF wheel has a total cooling efficiency of
69.65%, sensible cooling efficiency of 74.1%, and a
total heating efficiency of 71.25%.
The EG wheel efficiencies fall short of the minimum
60% requirement, and all other wheels have higher
efficiencies.
NOTE: In cases where more than one wheel can
meet the airflow and efficiency requirements, select
based upon economics. A unit with a larger, more
efficient wheel may result in a lower cost if smaller
fans can be used.
III Check fan performance for both supply and
exhaust fans.
Refer to the 62EHF fan curves on page 48 to select
the supply and exhaust fan options. The curves represent the maximum performance capability of each
fan option. As the fans have integral variable speed
drives, operation in the region below and to the left
of each curve is acceptable.
Both the E and L fan options are capable of meeting the required 3500 cfm at the supply static of
0.20 in. and return static of 0.75 in. Select the E
fan option since it is the least expensive of these
choices (refer to the price pages).
IV Calculate supply air temperatures.
Once the unit is selected, calculate the supply-air
temperatures leaving the 62E unit, as they will be
needed to select the packaged rooftop or HVAC
unit.
Refer to the following equations to calculate the
supply-air temperatures.
Cooling:
Supply air dry bulb,
Tsa db = Toa db – Es x (Toa db – Tra db)
Tsa db = 90 – 0.741 x (90 – 75)
Tsa db = 78.9 F
Supply air wet bulb:
Tsa wb = Toa wb – ET x (Toa wb – Tra wb)
Tsa wb = 74 – 0.6965 x (74 – 63)
Tsa wb = 66.3 F
Heating:
Supply air dry bulb,
Tsa db = Toa db – ET x (Toa db – Tra db)
Tsa db = –7 + 0.7125 (70 – (–7))
Tsa db = 47.9 F
Where:
T = dry bulb temperature (ºF)
H = enthalpy in Btu/lb
db = dry bulb
wb = wet bulb
oa = outdoor air
ra = return air
sa = supply air
29
Selection procedure (cont)
Es = sensible effectiveness
ET = total effectiveness
V Calculate energy recovered (psychrometric
chart required):
a. Cooling:
From psychrometric chart, determine enthalpy
of outside air at summer design temperature
(90 db/74 wb) to be 37.7 Btu/lb. Determine
enthalpy of return air at (75 db/63 wb) to
be 28.8 Btu/lb. From temperatures calculated in
Step IV, determine supply air enthalpy to
Enthalpy Supply Air (Hsa) = Hoa – ET (Hoa – Hra)
Hsa = 37.7 – .6965 (37.7 – 28.6)
Hsa = 31.36 Btu/lb
Energy Recovered (QT) = 4.5 x cfm x (Hoa – Hsa)
QT = 4.5 x 3500 x (37.7 – 31.36)
QT = 99,855 Btuh
QT (tons) = 99,855/12,000 = 8.3 tons
B. Heating:
Enthalpy Supply Air (Hsa) = Hoa + ET (Hra – Hoa)
Hsa = –0.8 +.7125 (22.1 – (–0.8))
Hsa = 15.52 Btu/lb
Energy Recovered (QT) = 4.5 x cfm x (Hsa – Hoa)
QT = 4.5 x 3500 x (15.52 – (–.8))
QT = 257,040 Btuh
QT (kW) = 257,040/3413 = 75.3 kW
VI Evaluate need for frost protection.
Using the Frost Thresholds Temperatures table on
page 61 and winter design conditions of 70 F and
30% RH indoor (return) air and –7 F outdoor air,
determine the frost threshold temperature of –3 F.
Since the outdoor-air temperature is below the frost
threshold, some method of frost protection is
required. Select electric preheat for this example.
Refer to the application data section starting on
page 59 for other methods, and see the Preheat
Frost Control Temperatures and Capacity Requirements at Selected Indoor and Outdoor Conditions
table on page 62.
VII Select electric preheat.
a. Determine required preheat temperature rise
from the Preheat Frost Control Temperatures
and Capacity (T) Requirements table on
page 62. For 70 F and 30% RH indoor air and
–7 F outdoor temperature, interpolating in the
table indicates that the preheat temperature
design (temperature leaving preheater) should
be 0° F, and the required capacity (rise) is 7 F.
b. Calculate preheat capacity required:
Required Reheat (Btuh) = 1.08 x cfm x T (F)
Btuh = 1.08 x 3500 x 7
= 26,460 Btuh
Convert Btuh to kW: 26,460/3413 = 7.75 kW
c. Refer to the available electric heater options and
select the 8 kW heater which meets or exceeds
the 7.75 kW requirement.
VIII Select appropriate accessories to suit
application.
See table below.
REQUIRED ACCESSORIES PER APPLICATION
UNIT CONFIGURATION
RTU Configuration
ERV
Configuration
ERV to RTU Airflow
APPLICATION
Vertical
Vertical
Contained with Combination Curb
ACCESSORY
Standard RTU Curb
Combination Curb
Drop-In Damper Box
ERV Curb
Horizontal Transition
Horizontal Base
ERV
RTU
30
LEGEND
— Energy Recovery Ventilator
— Rooftop Unit
Horizontal
Vertical
Vertical
Field-Supplied Duct, Under
Factory
Roof
Transitions, Above Roof
REQUIRED COMPONENTS
X
X
Horizontal
Factory
Transitions, Above Roof
X
X
X
X
X
X
X
X
Performance data
ERV WHEEL CAPACITY RANGE — 200 TO 5500 CFM
KD/6D
HF/5F
HD/5D
HB/5B
EG/4G
EF/4F
ED/4D
EB/4B
DG/3G
DD/3D
CG/2G
CD/2D
CC/2C
BC/7C
BA/7A
0
1000
2000
3000
4000
5000
6000
1890
2360
2830
CAPACITY RANGE (cfm)
0
470
940
1420
CAPACITY RANGE (L/s)
a62-514
31
Performance data (cont)
ERV WHEEL CAPACITY RANGE — 3,000 TO 30,000 CFM
UG
UD
TG
TD
SG
SD
RG
RD
PG
PD
NG
ND
MG
MD
LG
LD
KG/6G
HG/5G
0
5000
10000
15000
20000
25000
30000
9440
11800
14160
CAPACITY RANGE (cfm)
0
2360
4720
7080
CAPACITY RANGE (L/s)
a62-445
32
62EBA-62EDD ERV UNIT EFFECTIVENESS
ERV
UNIT
62EBA
and
62E7A
62EBC
and
62E7C
62ECC
and
62E2C
CFM
200
250
300
350
400
450
500
550
600
650
700
750
800
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
500
550
600
650
700
750
800
850
900
950
1,000
1,050
1,100
1,150
LEGEND
TC — Total Cooling
TH — Total Heating
Sensible
83.3
81.0
78.7
76.4
74.2
71.9
69.7
67.4
65.2
62.9
60.6
58.4
56.1
80.1
78.1
76.1
74.1
72.1
70.1
68.1
66.1
64.1
62.0
60.0
58.0
55.9
53.9
51.8
82.1
80.9
79.7
78.5
77.3
76.1
74.9
73.7
72.5
71.3
70.1
68.9
67.7
66.5
EFFECTIVENESS (%)
Latent
TC
77.7
80.3
74.2
77.2
70.7
74.2
67.2
71.2
63.7
68.3
60.3
65.3
56.8
62.3
53.3
59.3
49.8
56.3
46.3
53.3
42.8
50.3
39.3
47.2
35.7
44.2
72.1
75.7
70.1
73.6
68.1
71.6
66.1
69.6
64.1
67.7
62.1
65.7
60.1
63.7
58.1
61.7
56.1
59.7
54.0
57.7
52.0
55.7
50.0
53.7
47.9
51.6
45.9
49.6
43.8
47.5
75.1
78.2
73.9
77.0
72.7
75.8
71.5
74.6
70.3
73.5
69.1
72.3
67.9
71.1
66.7
69.9
65.5
68.7
64.3
67.5
63.1
66.3
61.9
65.1
60.7
63.9
59.4
62.7
TH
81.3
78.6
75.9
73.2
70.5
67.8
65.2
62.5
59.8
57.1
54.4
51.7
49.0
77.3
75.3
73.2
71.2
69.2
67.2
65.2
63.2
61.2
59.2
57.2
55.1
53.1
51.0
49.0
79.6
78.4
77.2
76.0
74.8
73.6
72.4
71.2
70.0
68.8
67.6
66.4
65.1
63.9
ERV
UNIT
62ECD
and
62E2D
62ECG
and
62E2G
62EDD
and
62E3D
CFM
400
450
500
550
600
650
700
750
800
850
900
950
1,000
1,050
1,100
500
550
600
650
700
750
800
850
900
950
1,000
1,050
1,100
1,150
1,200
1,250
1,300
1,350
1,400
600
700
800
900
1,000
1,100
1,200
1,300
1,400
1,500
1,600
Sensible
86.1
85.1
84.1
83.1
82.2
81.2
80.2
79.2
78.1
77.1
76.1
75.1
74.0
73.0
72.0
77.7
76.9
76.1
75.2
74.4
73.6
72.8
71.9
71.1
70.3
69.4
68.6
67.7
66.9
66.1
65.2
64.4
63.5
62.7
85.8
84.5
83.1
81.8
80.4
79.0
77.7
76.3
74.9
73.5
72.1
EFFECTIVENESS (%)
Latent
TC
78.1
81.6
77.1
80.6
76.1
79.6
75.1
78.6
74.1
77.6
73.1
76.6
72.1
75.6
71.1
74.7
70.1
73.7
69.1
72.7
68.1
71.7
67.1
70.6
66.1
69.6
65.1
68.6
64.0
67.6
74.4
76.1
73.2
75.1
72.1
74.1
70.9
73.1
69.8
72.0
68.6
71.0
67.4
70.0
66.3
68.9
65.1
67.9
63.9
66.9
62.8
65.8
61.6
64.8
60.4
63.8
59.2
62.7
58.0
61.7
56.9
60.6
55.7
59.6
54.5
58.5
53.3
57.5
77.8
81.3
76.5
80.0
75.1
78.6
73.7
77.3
72.4
75.9
71.0
74.5
69.6
73.2
68.3
71.8
66.9
70.4
65.5
69.1
64.1
67.7
TH
83.3
82.3
81.3
80.3
79.3
78.3
77.3
76.3
75.3
74.3
73.3
72.2
71.2
70.2
69.1
76.5
75.5
74.6
73.7
72.7
71.8
70.8
69.9
68.9
68.0
67.0
66.1
65.1
64.2
63.2
62.2
61.3
60.3
59.3
83.0
81.6
80.3
78.9
77.6
76.2
74.8
73.4
72.0
70.6
69.2
33
Performance data (cont)
62EDG-62EEG ERV UNIT EFFECTIVENESS
ERV UNIT
62EDG
and
62E3G
62EEB
and
62E4B
62EED
and
62E4D
CFM
800
900
1,000
1,100
1,200
1,300
1,400
1,500
1,600
1,700
1,800
1,900
2,000
800
900
1,000
1,100
1,200
1,300
1,400
1,500
1,600
1,700
1,800
1,100
1,200
1,300
1,400
1,500
1,600
1,700
1,800
1,900
2,000
2,100
2,200
2,300
2,400
2,500
2,600
LEGEND
TC — Total Cooling
TH — Total Heating
34
EFFECTIVENESS (%)
Sensible
Latent
TC
77.0
73.3
75.2
75.8
71.7
73.7
74.7
70.1
72.3
73.5
68.5
70.9
72.4
66.9
69.5
71.2
65.3
68.1
70.1
63.7
66.7
68.9
62.1
65.3
67.8
60.5
63.8
66.6
58.9
62.4
65.5
57.2
61.0
64.3
55.6
59.5
63.1
54.0
58.1
85.2
80.6
82.8
84.3
79.2
81.6
83.5
77.8
80.4
82.7
76.4
79.2
81.8
74.9
78.0
80.9
73.5
76.8
80.1
72.1
75.6
79.2
70.7
74.4
78.4
69.2
73.2
77.5
67.8
72.0
76.6
66.3
70.8
83.2
78.9
80.6
82.4
77.9
79.7
81.6
76.9
78.8
80.9
76.0
77.9
80.1
75.0
77.0
79.3
74.0
76.1
78.5
73.0
75.2
77.7
72.1
74.3
76.9
71.1
73.4
76.1
70.1
72.5
75.3
69.1
71.6
74.5
68.1
70.7
73.7
67.2
69.8
72.9
66.2
68.9
72.1
65.2
67.9
71.3
64.2
67.0
TH
75.6
74.3
73.0
71.7
70.4
69.1
67.8
66.5
65.2
63.9
62.5
61.2
59.9
83.6
82.5
81.5
80.4
79.4
78.3
77.3
76.2
75.1
74.1
73.0
81.6
80.8
79.9
79.1
78.2
77.4
76.5
75.7
74.8
74.0
73.1
72.2
71.4
70.5
69.6
68.8
ERV UNIT
62EEF
and
62E4F
62EEG
and
62E4G
CFM
1,300
1,400
1,500
1,600
1,700
1,800
1,900
2,000
2,100
2,200
2,300
2,400
2,500
2,600
2,700
1,300
1,400
1,500
1,600
1,700
1,800
1,900
2,000
2,100
2,200
2,300
2,400
2,500
2,600
2,700
2,800
2,900
3,000
3,100
3,200
3,300
3,400
3,500
EFFECTIVENESS (%)
Sensible
Latent
TC
78.0
70.0
73.6
76.9
68.9
72.5
75.8
67.8
71.4
74.7
66.7
70.3
73.7
65.7
69.2
72.6
64.6
68.1
71.5
63.5
67.1
70.4
62.4
66.0
69.3
61.3
64.9
68.2
60.2
63.8
67.0
59.1
62.7
65.9
57.9
61.6
64.8
56.8
60.5
63.7
55.7
59.4
62.6
54.6
58.2
79.4
74.7
76.7
78.5
73.5
75.5
77.6
72.4
74.5
76.7
71.2
73.4
75.8
70.1
72.4
74.9
68.9
71.3
74.0
67.8
70.3
73.1
66.6
69.2
72.2
65.5
68.1
71.3
64.3
67.1
70.4
63.2
66.0
69.5
62.0
65.0
68.6
60.9
63.9
67.6
59.7
62.9
66.7
58.6
61.8
65.8
57.4
60.7
64.9
56.2
59.7
64.0
55.1
58.6
63.1
53.9
57.5
62.2
52.7
56.5
61.3
51.6
55.4
60.4
50.4
54.3
59.4
49.2
53.3
TH
75.2
74.1
73.0
71.9
70.8
69.7
68.6
67.5
66.4
65.3
64.2
63.1
62.0
60.9
59.7
77.7
76.7
75.7
74.7
73.7
72.7
71.7
70.7
69.8
68.8
67.8
66.8
65.8
64.8
63.8
62.8
61.8
60.8
59.8
58.8
57.8
56.8
55.8
62EHB-62EKG ERV UNIT EFFECTIVENESS
ERV UNIT
62EHB
and
62E5B
62EHD
and
62E5D
62EHF
and
62E5F
CFM
1,400
1,600
1,800
2,000
2,200
2,400
2,600
2,800
3,000
3,200
3,400
3,600
2,200
2,400
2,600
2,800
3,000
3,200
3,400
3,600
3,800
4,000
4,200
4,400
4,600
4,800
5,000
5,200
5,400
5,600
2,200
2,400
2,600
2,800
3,000
3,200
3,400
3,600
3,800
4,000
4,200
4,400
4,600
4,800
5,000
5,200
5,400
EFFECTIVENESS (%)
Sensible
Latent
TC
86.2
82.5
84.3
85.5
81.1
83.2
84.7
79.8
82.1
83.9
78.5
81.0
83.1
77.1
79.9
82.3
75.8
78.7
81.5
74.5
77.6
80.7
73.1
76.5
79.9
71.8
75.3
79.1
70.4
74.2
78.2
69.0
73.0
77.4
67.7
71.9
83.7
79.7
81.3
83.0
78.7
80.4
82.2
77.8
79.6
81.5
76.9
78.8
80.7
76.0
77.9
80.0
75.1
77.1
79.2
74.2
76.2
78.5
73.3
75.4
77.7
72.4
74.6
77.0
71.5
73.7
76.2
70.6
72.9
75.5
69.7
72.0
74.7
68.8
71.2
74.0
67.9
70.3
73.2
66.9
69.5
72.5
66.0
68.6
71.7
65.1
67.8
71.0
64.2
66.9
80.8
72.8
76.3
79.8
71.8
75.3
78.7
70.7
74.3
77.7
69.7
73.2
76.7
68.7
72.2
75.6
67.6
71.2
74.6
66.6
70.2
73.6
65.6
69.1
72.5
64.5
68.1
71.5
63.5
67.1
70.5
62.4
66.0
69.4
61.4
65.0
68.4
60.3
64.0
67.3
59.3
62.9
66.3
58.2
61.9
65.2
57.2
60.8
64.1
56.1
59.8
ERV UNIT
TH
84.9
83.9
82.9
82.0
81.0
80.0
79.0
78.0
77.0
76.0
75.0
74.0
82.2
81.4
80.6
79.8
79.0
78.2
77.4
76.6
75.8
75.0
74.2
73.4
72.6
71.8
71.0
70.2
69.3
68.5
78.0
76.9
75.9
74.9
73.8
72.8
71.8
70.7
69.7
68.6
67.6
66.5
65.5
64.4
63.4
62.3
61.3
62EHG
and
62E5G
62EKD
and
62E6D
62EKG
and
62E6G
CFM
3,000
3,200
3,400
3,600
3,800
4,000
4,200
4,400
4,600
4,800
5,000
5,200
5,400
5,600
5,800
6,000
6,200
6,400
6,600
6,800
7,000
7,200
7,400
2,500
3,000
3,500
4,000
4,500
5,000
5,500
4,000
4,500
5,000
5,500
6,000
6,500
7,000
7,500
8,000
8,500
9,000
9,500
10,000
10,500
EFFECTIVENESS (%)
Sensible
Latent
TC
78.3
73.3
75.3
77.5
72.3
74.3
76.6
71.2
73.3
75.8
70.1
72.4
74.9
69.0
71.4
74.1
67.9
70.4
73.2
66.8
69.4
72.4
65.7
68.4
71.5
64.7
67.4
70.7
63.6
66.4
69.8
62.5
65.4
68.9
61.4
64.4
68.1
60.3
63.4
67.2
59.2
62.4
66.4
58.1
61.4
65.5
57.0
60.4
64.7
55.9
59.4
63.8
54.8
58.4
62.9
53.7
57.4
62.1
52.6
56.4
61.2
51.5
55.4
60.4
50.4
54.3
59.5
49.3
53.3
87.3
82.3
84.2
86.0
81.0
83.0
84.7
79.7
81.7
83.4
78.4
80.4
82.1
77.1
79.1
80.7
75.7
77.7
79.4
74.4
76.4
79.2
74.5
76.4
77.7
72.6
74.7
76.2
70.7
72.9
74.7
68.8
71.2
73.3
66.9
69.5
71.8
65.0
67.7
70.3
63.1
66.0
68.8
61.2
64.2
67.3
59.3
62.5
65.8
57.4
60.7
64.3
55.5
59.0
62.8
53.6
57.2
61.3
51.6
55.4
59.7
49.7
53.7
TH
76.5
75.6
74.6
73.7
72.8
71.8
70.9
70.0
69.0
68.1
67.2
66.2
65.3
64.4
63.4
62.5
61.6
60.6
59.7
58.7
57.8
56.8
55.9
85.5
84.2
82.9
81.6
80.3
78.9
77.6
77.5
75.9
74.2
72.6
71.0
69.4
67.7
66.1
64.4
62.8
61.1
59.5
57.8
56.2
LEGEND
TC — Total Cooling
TH — Total Heating
35
Performance data (cont)
62ELD-62ENG ERV UNIT EFFECTIVENESS
ERV UNIT
62ELD
62ELG
62EMD
62EMG
36
CFM
3,500
4,000
4,500
5,000
5,500
6,000
6,500
7,000
7,500
8,000
8,500
9,000
5,000
5,500
6,000
6,500
7,000
7,500
8,000
8,500
9,000
9,500
10,000
10,500
11,000
11,500
12,000
3,000
3,500
4,000
4,500
5,000
5,500
6,000
6,500
7,000
7,500
5,500
6,000
6,500
7,000
7,500
8,000
8,500
9,000
9,500
10,000
10,500
11,000
11,500
12,000
12,500
13,000
13,500
14,000
14,500
EFFECTIVENESS (%)
Sensible
Latent
TC
84.0
80.0
81.7
82.9
78.7
80.4
81.8
77.3
79.1
80.7
75.9
77.8
79.5
74.6
76.6
78.4
73.2
75.3
77.3
71.9
74.0
76.2
70.5
72.8
75.0
69.1
71.5
73.9
67.7
70.2
72.8
66.3
68.9
71.6
65.0
67.6
78.2
73.2
75.2
76.9
71.6
73.7
75.6
70.0
72.2
74.3
68.3
70.7
73.0
66.7
69.2
71.8
65.0
67.7
70.5
63.4
66.2
69.2
61.8
64.7
67.9
60.1
63.2
66.6
58.5
61.7
65.3
56.8
60.2
64.0
55.2
58.7
62.7
53.5
57.1
61.4
51.8
55.6
60.1
50.2
54.1
87.9
82.9
84.9
86.9
82.0
83.9
86.0
81.0
83.0
85.1
80.1
82.1
84.1
79.2
81.1
83.2
78.2
802.0
82.2
77.2
79.2
81.2
76.3
78.3
80.3
75.3
77.3
79.3
76.3
76.3
79.4
74.4
76.4
78.3
73.0
75.1
77.2
71.6
73.8
76.1
70.2
72.6
75.0
68.8
71.3
74.0
67.4
70.0
72.9
66.0
68.7
71.8
64.6
67.5
70.7
63.2
66.2
69.6
61.9
64.9
68.5
60.5
63.6
67.4
59.1
62.4
66.3
57.7
61.1
65.2
56.3
59.8
64.1
54.9
58.5
63.0
53.5
57.2
61.9
52.0
55.9
60.8
50.6
54.6
59.7
49.2
53.3
ERV UNIT
TH
82.6
81.4
80.2
79.0
77.7
76.5
75.3
74.1
72.9
71.7
70.4
69.2
76.4
75.0
73.6
72.2
70.8
69.3
67.9
66.5
65.1
63.7
62.3
60.8
59.4
58.0
56.6
86.1
85.2
84.2
83.3
82.3
81.4
80.4
79.5
78.5
77.5
77.6
76.4
75.2
74.0
72.8
71.6
70.4
69.2
68.0
66.8
65.6
64.4
63.2
62.0
60.8
59.6
58.4
57.2
56.0
62END
62ENG
CFM
5,500
6,000
6,500
7,000
7,500
8,000
8,500
9,000
9,500
10,000
10,500
11,000
11,500
12,000
12,500
13,000
13,500
7,000
7,500
8,000
8,500
9,000
9,500
10,000
10,500
11,000
11,500
12,000
12,500
13,000
13,500
14,000
14,500
15,000
15,500
16,000
16,500
17,000
17,500
LEGEND
TC — Total Cooling
TH — Total Heating
EFFECTIVENESS (%)
Sensible
Latent
TC
83.3
79.2
80.9
82.5
78.3
80.0
81.8
77.3
79.1
81.0
76.4
78.2
80.2
75.4
77.4
79.4
74.5
76.5
78.7
73.6
75.6
77.9
72.6
74.7
77.1
71.7
73.8
76.3
70.7
73.0
75.5
69.8
72.1
74.7
68.8
71.2
74.0
67.9
70.3
73.2
66.9
69.4
72.4
66.0
68.5
71.6
65.0
67.6
70.8
64.0
66.7
78.7
73.8
75.8
77.8
72.7
74.7
76.9
71.5
73.7
76.0
70.4
72.6
75.1
69.3
71.6
74.2
68.1
70.6
73.3
67.0
69.5
72.4
65.9
68.5
71.5
64.7
67.5
70.7
63.6
66.4
69.8
62.5
65.4
68.9
61.3
64.3
68.0
60.2
63.3
67.1
59.1
62.3
66.2
57.9
61.2
65.3
56.8
60.2
64.4
55.6
59.1
63.5
54.5
58.1
62.6
53.4
57.0
61.7
52.2
56.0
60.8
51.1
54.9
59.9
49.9
53.9
TH
81.8
81.0
80.2
79.3
78.5
77.7
76.8
76.0
75.1
74.3
73.5
72.6
71.8
70.9
70.1
69.2
68.4
76.9
75.9
74.9
74.0
73.0
72.0
71.1
70.1
69.1
68.1
67.2
66.2
65.2
64.2
63.3
62.3
61.3
60.3
59.3
58.3
57.4
56.4
62EPD-62ESD ERV UNIT EFFECTIVENESS
ERV UNIT
62EPD
62EPG
CFM
6,000
6,500
7,000
7,500
8,000
8,500
9,000
9,500
10,000
10,500
11,000
11,500
12,000
12,500
13,000
13,500
14,000
14,500
15,000
15,500
7,500
8,000
8,500
9,000
9,500
10,000
10,500
11,000
11,500
12,000
12,500
13,000
13,500
14,000
14,500
15,000
15,500
16,000
16,500
17,000
17,500
18,000
18,500
19,000
19,500
20,000
EFFECTIVENESS (%)
Sensible
Latent
TC
83.7
79.7
81.3
83.0
78.8
80.5
82.3
78.0
79.8
81.7
77.2
79.0
81.0
76.4
78.2
80.3
75.5
77.5
79.6
74.7
76.7
78.9
73.9
75.9
78.3
73.1
75.1
77.6
72.2
74.4
76.9
71.4
73.6
76.2
70.6
72.8
75.5
69.7
72.1
74.8
68.9
71.3
74.1
68.1
70.5
73.4
67.2
69.7
72.8
66.4
68.9
72.1
65.6
68.1
71.4
64.7
67.4
70.7
63.9
66.6
79.4
74.7
76.6
78.6
73.7
75.7
77.9
72.7
74.8
77.1
71.7
73.9
76.3
70.7
73.0
75.5
69.8
72.1
74.7
68.8
71.2
74.0
67.8
70.2
73.2
66.8
69.3
72.4
65.8
68.4
71.6
64.8
67.5
70.9
63.8
66.6
70.1
62.8
65.7
69.3
61.8
64.8
68.5
60.8
63.9
67.7
59.8
62.9
66.9
58.8
62.0
66.2
57.8
61.1
65.4
56.8
60.2
64.6
55.8
59.3
63.8
54.8
58.4
63.0
53.8
57.4
62.2
52.8
56.5
61.4
51.8
55.6
60.7
50.8
54.7
59.9
49.7
53.7
ERV UNIT
TH
82.2
81.5
80.8
80.0
79.3
78.6
77.8
77.1
76.4
75.6
74.9
74.2
73.4
72.7
72.0
71.2
70.5
69.7
69.0
68.2
77.7
76.9
76.0
75.1
74.3
73.4
72.6
71.7
70.9
70.0
69.2
68.3
67.5
66.6
65.8
64.9
64.0
63.2
62.3
61.5
60.6
59.7
58.9
58.0
57.1
56.3
62ERD
62ERG
62ESD
CFM
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
EFFECTIVENESS (%)
Sensible
Latent
TC
83.9
78.9
81.3
82.5
77.8
80.0
81.0
76.6
78.7
79.6
75.5
77.5
78.1
74.3
76.2
76.7
73.1
75.0
75.2
72.0
73.7
73.7
70.8
72.4
72.3
69.6
71.1
70.8
68.4
69.8
69.3
67.3
68.5
76.7
70.7
73.5
75.1
69.3
72.0
73.5
68.0
70.6
71.9
66.6
69.2
70.3
65.2
67.7
68.7
63.9
66.3
67.1
62.5
64.8
65.5
61.1
63.4
63.9
59.7
61.9
62.3
58.3
60.4
60.7
57.0
59.0
59.1
55.6
57.5
57.5
54.2
56.0
55.9
52.8
54.6
54.3
51.4
53.1
52.6
50.0
51.6
84.3
79.3
81.6
83.1
78.3
80.6
81.9
77.4
79.5
80.7
76.4
78.5
79.5
75.4
77.4
78.3
74.5
76.4
77.1
73.5
75.3
75.8
72.5
74.3
74.6
71.5
73.2
73.4
70.6
72.1
72.1
69.6
71.1
70.9
68.6
70.0
69.7
67.6
68.9
TH
82.1
80.8
79.4
78.1
76.7
75.3
74.0
72.6
71.2
69.9
68.5
74.6
73.0
71.5
70.0
68.5
66.9
65.4
63.9
62.4
60.8
59.3
57.8
56.2
54.7
53.1
51.6
82.5
81.4
80.3
79.1
78.0
76.9
75.7
74.6
73.5
72.3
71.2
70.0
68.8
LEGEND
TC — Total Cooling
TH — Total Heating
37
Performance data (cont)
62ESG-62EUG ERV UNIT EFFECTIVENESS
ERV UNIT
62ESG
62ETD
62ETG
38
CFM
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000
26,000
27,000
28,000
29,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000
26,000
27,000
28,000
29,000
30,000
EFFECTIVENESS(%)
Sensible
Latent
TC
76.4
70.5
73.2
75.0
69.3
72.0
73.7
68.2
70.8
72.3
67.0
69.6
71.0
65.9
68.4
69.7
64.8
67.2
68.3
63.6
65.9
67.0
62.5
64.7
65.6
61.3
63.5
64.3
60.2
62.3
62.9
59.0
61.1
61.6
57.9
59.9
60.2
56.7
58.6
58.9
55.5
57.4
57.5
54.4
56.2
56.2
53.2
54.9
54.8
52.1
53.7
53.4
50.9
52.5
52.1
49.7
51.2
84.0
79.0
81.3
82.9
78.1
80.3
81.8
77.2
79.4
80.6
76.3
78.4
79.5
75.4
77.4
78.4
74.5
76.5
77.3
73.6
75.5
76.2
72.7
74.5
75.0
71.8
73.5
73.9
70.9
72.5
72.8
70.0
71.5
71.6
69.1
70.5
70.5
68.1
69.5
69.3
67.2
68.5
76.3
70.4
73.1
75.0
69.3
72.0
73.8
68.3
70.9
72.5
67.2
69.8
71.3
66.2
68.6
70.1
65.1
67.5
68.8
64.0
66.4
67.6
63.0
65.3
66.4
61.9
64.2
65.1
60.9
63.0
63.9
59.8
61.9
62.6
58.7
60.8
61.4
57.7
59.7
60.1
56.6
58.5
58.9
55.5
57.4
57.6
54.5
56.3
56.4
53.4
55.1
55.1
52.3
54.0
53.9
51.2
52.9
ERV UNIT
TH
74.2
73.0
71.7
70.4
69.1
67.9
66.6
65.3
64.0
62.7
61.5
60.2
58.9
57.6
56.3
55.0
53.7
52.4
51.1
82.2
81.1
80.1
79.1
78.0
77.0
75.9
74.9
73.8
72.8
71.7
70.6
69.6
68.5
74.1
73.0
71.8
70.6
69.4
68.3
67.1
65.9
64.7
63.5
62.4
61.2
60.0
58.8
57.6
56.4
55.2
54.0
52.8
62EUD
62EUG
CFM
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000
26,000
27,000
28,000
29,000
30,000
LEGEND
TC — Total Cooling
TH — Total Heating
EFFECTIVENESS (%)
Sensible
Latent
TC
84.3
79.2
81.6
83.3
78.4
80.7
82.3
77.6
79.8
81.4
76.8
79.0
80.4
76.0
78.1
79.4
75.3
77.3
78.4
74.5
76.4
77.5
73.7
75.6
76.5
72.9
74.7
75.5
72.1
73.9
74.5
71.3
73.0
73.5
70.5
72.1
72.5
69.7
71.3
71.5
68.9
70.4
70.5
68.1
69.5
69.5
67.3
68.7
76.0
70.2
72.9
75.0
69.3
71.9
73.9
68.4
71.0
72.8
67.4
70.0
71.7
66.5
69.0
70.7
65.6
68.1
69.6
64.7
67.1
68.5
63.8
66.1
67.4
62.8
65.1
66.4
61.9
64.2
65.3
61.0
63.2
64.2
60.1
62.2
63.1
59.1
61.2
62.0
58.2
60.3
61.0
57.3
59.3
59.9
56.4
58.3
58.8
55.4
57.3
TH
82.5
81.5
80.6
79.7
78.8
77.9
77.0
76.1
75.1
74.2
73.3
72.4
71.4
70.5
69.6
68.6
73.9
72.9
71.9
70.9
69.8
68.8
67.8
66.8
65.7
64.7
63.7
62.7
61.6
60.6
59.6
58.5
57.5
FAN PERFORMANCE CURVES
62EBA, 62E7A,
62EBC, 62E7C
— A Supply
62EAA/62EAC
— A Supply
Fan Fan
550
500
450
400
350
CFM
300
250
200
150
100
50
0
0.00
0.10
Supply Blower High
Supply Blower Speed 3
Supply Blower Speed 2
Supply Blower Low
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
0.80
0.90
1.00
in. wg External Static
a62-338
62EBA, 62E7A,
62EBC, 62E7C
— A Exhaust
62EAA/62EAC
— A Exhaust
Fan Fan
500
450
400
350
CFM
300
250
200
150
100
50
0
0.00
0.10
Exhaust Blower High
Exhaust Blower Speed 3
Exhaust Blower Speed 2
Exhaust Blower Low
0.20
0.30
0.40
0.50
0.60
0.70
in. wg External Static
a62-339
39
Performance data (cont)
FAN PERFORMANCE CURVES (cont)
62EBC,
62E7C
—Supply
B Supply
Fan
62EAC
—B
Fan
1000
900
800
700
CFM
600
500
400
300
200
100
0
0.00
0.10
Supply Blowers High
Supply Blowers Speed 3
Supply Blowers Speed 2
Supply Blowers Low
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
0.70
0.80
0.90
1.00
in. wg External Static
a62-340
62EBC,
62E7C
ExhaustFan
Fan
62EAC
——
BB
Exhaust
1000
900
800
700
CFM
600
500
400
300
200
100
0
0.00
a62-341
40
0.10
Exhaust Blowers High
Exhaust Blowers Speed 3
Exhaust Blowers Speed 2
Exhaust Blowers Low
0.20
0.30
0.40
0.50
0.60
in. wg External Static
FAN PERFORMANCE CURVES (cont)
a62-5442
62EBS,62E7S
600
500
CFM
400
300
200
Single Phase
100
0
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
2.75
3.00
in. wg External Static
41
Performance data (cont)
FAN PERFORMANCE CURVES (cont)
a62-342
62ECC,
62E2C
62ECC
1200
C Fan Option (Three Phase)
1100
C Fan Option (Single Phase)
1000
CFM
900
800
700
600
500
400
0.00
0.25
0.50
0.75
1.00
in. wg External Static
1.25
1.50
1.75
2.00
62ECD,
62E2D
62ECD
a62-343
1200
C Fan Option (Three Phase)
1100
C Fan Option (Single Phase)
1000
CFM
900
800
700
600
500
400
0.00
42
0.25
0.50
0.75
1.00
in. wg External Static
1.25
1.50
1.75
2.00
FAN PERFORMANCE CURVES (cont)
62ECG,
62E2G
62ECG
1300
C Fan Option (Three Phase)
1200
C Fan Option (Single Phase)
1100
CFM
1000
900
800
700
600
500
0.00
a62-543
0.25
0.50
0.75
a62-543
1.00
in. wg External Static
1.25
1.50
1.75
2.00
62ECS, 62E2S
800
700
600
CFM
500
400
300
200
Single Phase
100
0
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
2.75
3.00
in. wg External Static
43
Performance data (cont)
FAN PERFORMANCE CURVES (cont)
a62-345
62EDD,
62E3D
62EDD
2000
1900
1800
1700
1600
1500
CFM
1400
1300
1200
1100
1000
900
800
C Fan Option
700
600
0.00
0.25
0.50
0.75
1.00
in. wg External Static
1.25
1.50
1.75
2.00
1.25
1.50
1.75
2.00
62EDG,
62E3G
62EDG
2000
1900
1800
1700
1600
1500
CFM
1400
1300
1200
1100
1000
900
800
C Fan Option
700
a62-346
44
600
0.00
0.25
0.50
0.75
1.00
in. wg External Static
FAN PERFORMANCE CURVES (cont)
a62-347
62EEB,
62E4B
62EEB
1800
1700
1600
1500
CFM
1400
1300
1200
1100
1000
C Fan Option
E Fan Option
900
800
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
2.25
2.50
2.75
3.00
3.25
3.50
62EED,
62E4D
62EED
2800
2600
2400
2200
CFM
2000
1800
1600
1400
C Fan Option
1200
1000
0.00
a62-348
E Fan Option
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
45
Performance data (cont)
FAN PERFORMANCE CURVES (cont)
a62-349
62EEF,62EEF
62E4F
2800
2600
2400
CFM
2200
2000
1800
1600
C Fan Option
1400
E Fan Option
1200
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
62EEG,
62E4G
62EEG
4000
3800
3600
3400
3200
3000
CFM
2800
2600
2400
2200
2000
1800
a62-350
46
1600
C Fan Option
1400
E Fan Option
1200
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
FAN PERFORMANCE CURVES (cont)
a62-351
62EHB,
62E5B
62EHB
3800
3600
3400
3200
3000
CFM
2800
2600
2400
2200
2000
1800
1600
E Fan Option
1400
F Fan Option
1200
1.00
1.25
1.50
1.75
2.00
2.25
2.50
2.75
in. wg External Static
3.00
3.25
3.50
3.75
4.00
62EHD,
62E5D
62EHD
6000
5750
5500
5250
5000
4750
4500
CFM
4250
4000
3750
3500
3250
3000
L Fan Option
2750
E Fan Option
2500
F Fan Option
2250
a62-532
2000
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
47
Performance data (cont)
FAN PERFORMANCE CURVES (cont)
a62-353
62EHF,
62E5F
62EHF
5500
5250
5000
4750
4500
4250
CFM
4000
3750
3500
3250
3000
2750
L Fan Option
2500
E Fan Option
F Fan Option
2250
2000
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
2.25
2.50
2.75
3.00
3.25
3.50
62EHG,
62E5G
62EHG
8000
7500
7000
6500
CFM
6000
5500
5000
4500
4000
L Fan Option
E Fan Option
3500
F Fan Option
3000
0.00
a62-354
48
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
FAN PERFORMANCE CURVES (cont)
a62-355
62EKD, 62E6D
62EKD
8000
L Fan Option
7500
F Fan Option
7000
E Fan Option
6500
M Fan Option
6000
CFM
5500
5000
4500
4000
3500
3000
2500
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
62EKG,
62E6G
62EKG
9000
8500
L Fan Option
8000
F Fan Option
M Fan Option
7500
7000
CFM
6500
6000
5500
5000
4500
4000
3500
0.00
a62-356
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
49
Performance data (cont)
FAN PERFORMANCE CURVES (cont)
a62-357
62ELD
10000
L Fan Option
9500
M Fan Option
9000
F Fan Option
G Fan Option
8500
8000
7500
CFM
7000
6500
6000
5500
5000
4500
4000
3500
3000
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
in. wg External Static
2.50
2.75
3.00
3.25
3.50
3.75
4.00
62ELG
13000
12500
M Fan Option
12000
F Fan Option
11500
G Fan Option
11000
10500
10000
9500
CFM
9000
8500
8000
7500
7000
6500
6000
5500
5000
4500
a62-358
50
4000
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
FAN PERFORMANCE CURVES (cont)
a62-359
62EMD
11000
10500
F Fan Option
10000
M Fan Option
9500
G Fan Option
9000
8500
CFM
8000
7500
7000
6500
6000
5500
5000
4500
4000
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
62EMG
13000
12500
M Fan Option
12000
G Fan Option
11500
F Fan Option
11000
10500
CFM
10000
9500
9000
8500
8000
7500
7000
6500
a62-360
6000
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
51
Performance data (cont)
FAN PERFORMANCE CURVES (cont)
a62-361
62END
13500
13000
M Fan Option
12500
G Fan Option
12000
F Fan Option
11500
11000
10500
CFM
10000
9500
9000
8500
8000
7500
7000
6500
6000
5500
5000
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
62ENG
14000
13500
G Fan Option
13000
M Fan Option
12500
12000
11500
CFM
11000
10500
10000
9500
9000
8500
8000
7500
7000
6500
0.00
a62-362
52
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
FAN PERFORMANCE CURVES (cont)
a62-363
62EPD
14000
13500
M Fan Option
13000
F Fan Option
12500
G Fan Option
12000
11500
11000
CFM
10500
10000
9500
9000
8500
8000
7500
7000
6500
6000
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
62EPG
14500
14000
M Fan Option
13500
G Fan Option
13000
12500
CFM
12000
11500
11000
10500
10000
9500
9000
8500
8000
0.00
a62-364
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
53
Performance data (cont)
FAN PERFORMANCE CURVES (cont)
a62-365
62ERD
18000
M Fan Option
17000
G Fan Option
N Fan Option
16000
H Fan Option
15000
J Fan Option
14000
CFM
13000
12000
11000
10000
9000
8000
7000
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
62ERG
22000
21000
G Fan Option
20000
N Fan Option
19000
H Fan Option
J Fan Option
18000
17000
CFM
16000
15000
14000
13000
12000
11000
10000
9000
8000
0.00
a62-366
54
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
FAN PERFORMANCE CURVES (cont)
a62-367
62ESD
20000
19000
N Fan Option
H Fan Option
18000
J Fan Option
17000
K Fan Option
16000
CFM
15000
14000
13000
12000
11000
10000
9000
8000
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
62ESG
25000
N Fan Option
24000
H Fan Option
23000
J Fan Option
22000
K Fan Option
21000
20000
CFM
19000
18000
17000
16000
15000
14000
13000
12000
11000
a62-368
10000
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
55
Performance data (cont)
FAN PERFORMANCE CURVES (cont)
a62-369
62ETD
22000
H Fan Option
21000
J Fan Option
20000
K Fan Option
N Fan Option
19000
P Fan Option
18000
R Fan Option
CFM
17000
16000
15000
14000
13000
12000
11000
10000
9000
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
62ETG
30000
29000
J Fan Option
28000
K Fan Option
27000
N Fan Option
26000
P Fan Option
25000
R Fan Option
24000
23000
CFM
22000
21000
20000
19000
18000
17000
16000
15000
14000
13000
a62-370
56
12000
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
FAN PERFORMANCE CURVES (cont)
a62-371
62EUD
25000
24000
H Fan Option
23000
J Fan Option
K Fan Option
22000
N Fan Option
21000
P Fan Option
20000
R Fan Option
CFM
19000
18000
17000
16000
15000
14000
13000
12000
11000
10000
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
in. wg External Static
2.25
2.50
2.75
3.00
3.25
3.50
62EUG
30000
29000
N Fan Option
28000
H Fan Option
J Fan Option
27000
K Fan Option
26000
R Fan Option
25000
P Fan Option
24000
CFM
23000
22000
21000
20000
19000
18000
17000
16000
15000
a62-372
14000
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
in. wg External Static
2.00
2.25
2.50
2.75
3.00
57
Typical control wiring schematics
a62-373
58
Application data
All ventilated spaces are good candidates for energy recovery systems. The applications that benefit most are those
that require a large amount of outside air for a space that
has a low internal load. This is true because most outside
air loads are latent which requires a larger rooftop unit to
accommodate both internal and ventilation loads. Advantages of the ERV unit include the ability to reduce the size
of the rooftop unit, provide better humidity levels and provide a stable, tempered space.
Examples of ERV applications are classrooms, churches,
conference rooms, game rooms, auditoriums, movie theaters, day care centers, nursing homes, funeral homes,
dormitories, and clinics. Retrofits of existing systems to
handle outside air without modifying the rooftop unit are
excellent applications. Other examples are bars, restaurants, casino/game rooms, barber/beauty shops, bingo
halls, locker rooms, recreational facilities and health clubs.
Animal shelters such as veterinary clinics and kennels have
been very successful implementations. Retail spaces and
manufacturing facilities are also good applications.
Carrier total energy recovery
Carrier 62E energy recovery wheels consist of a welded
stainless steel hub, spoke and rim assembly, which is independent of the heat transfer matrix. The heat transfer
matrix is contained in patented energy transfer segments,
removable from the wheel without requiring tools. The
energy wheel uses a unique parallel plate geometry and
polymer film substrate to provide an optimized heat
exchanger design. The polymer film construction is not
subject to corrosion in coastal locations or swimming pool
areas.
TOTAL ENERGY RECOVERY WHEEL
AIR-TO-AIR ENERGY RECOVERY VENTILATION —
AIRFLOW CONVENTION
EA
EATR
OA
— Exhaust Air
— Exhaust Air
Transfer Ratio
— Outdoor Air
LEGEND
OACF — Outdoor Air
Correction Factor
RA
— Return Air
SA
— Supply Air
If the outside air requirement is greater than 10% of a
rooftop unit’s supply air rating an ERV unit should be considered to enhance the comfort of the occupants and
reduce the tonnage of the rooftop unit. Carrier’s 62E
selection program offers a quick, simple look at the advantages and payback of an ERV system.
Choosing the proper airflow is essential. Carrier offers
fourteen unit sizes from 350 to 25,000 cfm to allow
the designer to optimize the selection based on the
application.
Note that all units can be used in applications that
require less airflow than the published cfm operating
range. This option can be used for high-static applications.
Although performance is optimized at equal exhaust and
supply airflow rates, the selection program and the 62E
unit can be used with unequal airflow amounts. The unit
must be sized for the largest airflow amount. The smaller
airflow used cannot be less than 50% of the larger airflow
in the published range.
Silica gel technology — The 62E energy recovery
wheels use the desiccant material known as silica gel,
which is a highly porous solid adsorbent material that structurally resembles a rigid sponge. It has a very large internal
surface composed of myriad microscopic cavities and a
vast system of capillary channels that provide pathways
connecting the internal microscopic cavities to the outside
surface of the sponge. Silica gel enthalpy wheels transfer
water by rotating between two airstreams of different
vapor pressures. The vapor pressure differential drives
molecules into/from these cavities to transfer moisture
from the more humid airstream to the drier airstream.
MICROSCOPIC IMAGE OF SILICA GEL
59
Application data (cont)
Adsorption: silica gel vs. molecular sieve — The Effect of
Relative Humidity on Desiccant Capacity graph shows the
characteristic curve for adsorption of water on silica gel. It
shows the percent weight adsorbed versus relative humidity
of the airstream in contact with the silica gel. The amount
of water adsorbed rises linearly with increasing relative
humidity (rh) until rh reaches near 60%. It then plateaus at
above 40% adsorbed as relative humidity approaches
100%. For contrast, the curve for molecular sieves rises
rapidly to plateau at about 20% adsorbed at 20% rh.
The Effect of Relative Humidity on Dessicant Capacity
graph explains the following application considerations:
• Molecular sieves are preferred for regenerated applications such as desiccant cooling and dehumidification
systems that must reduce the processed airstreams to
very low relative humidities.
• Silica gel has superior characteristics for recovering
space conditioning energy from exhaust air and handling high relative humidity outside conditions.
The transfer of water by adsorption/desorption is not
dependent on temperature. Therefore, the silica gel
enthalpy wheel works to reduce latent load at difficult partload conditions.
Fungal growth and moisture transfer
Water transfer — Carrier 62E units have silica gel-based
desiccant wheels. The water molecules are individually
transferred by desorption/adsorption to and from the silica
gel surfaces. Water is present on the wheel in a molecular
layer only, and condensation does not occur. Therefore,
Carrier's energy recovery wheels experience dry moisture
transfer; there is no bulk liquid water present that could
support fungal growth. Water transfer to and from the
wheel's desiccant surfaces occurs in the vapor phase; there
are no wet surfaces and liquid water does not enter the airstream. Silica gel is also highly selective for water, based on
the strong preference of the gel surface for the dipolar
water molecule over other compounds.
Frost control requirements
Energy recovery systems require frost protection or a
means of defrosting in climates that experience severe
winter conditions. Frost formation results in a reduction
and eventual blockage of airflow through the energy
wheel.
Frost formation causes reduced airflow through the heat
exchanger. Without frost control, energy recovery and airflow may be significantly reduced. The frost threshold temperature is the point at which frost begins to accumulate on
heat exchanger surfaces. It is a function of both outside
temperature and indoor relative humidity. The Frost
Threshold Comparison figure compares the frost threshold
of a plate-type sensible heat exchanger with that of an
enthalpy wheel.
Note that frost forms at temperatures between 22 F and
30 F in a plate-type heat exchanger, frost threshold
temperatures for enthalpy wheels are generally 20 to
30 degrees lower, approximately 0° F to 20 F. This is
because the enthalpy wheel removes water from the
exhaust airstream, effectively lowering the exhaust’s dew
point. The water removed is subsequently picked up
through desorption by the entering outdoor air.
Depending on the indoor relative humidity in areas
where winter outside temperatures are between –5 F and
22 F, enthalpy wheel based recovery systems have a
significant advantage over sensible plate type units because
there is no additional cost for frost control. Even in cold
areas, in most cases, enthalpy wheel based systems for
schools and office buildings can be designed without frost
control because most of the frosting hours are at night
when the building is unoccupied. Consult bin data, such as
that provided by ASHRAE, to qualify daytime applications
in cold climates for frost-free operation.
FROST THRESHOLD COMPARISON
EFFECT OF RELATIVE HUMIDITY ON
DESICCANT CAPACITY
Frost Thresholds:
Enthalpy Wheels vs. Plate-type Heat Exchangers
60
The Frost Thresholds Temperatures table lists typical
frost threshold temperatures for Carrier’s total energy
recovery wheels over a wide range of indoor-air temperatures and relative humidities. Frost control is not required
until outdoor-air temperatures are below the threshold.
FROST THRESHOLDS TEMPERATURES (F)
INDOOR AIR
RH (%)
20
30
40
50
60
INDOOR AIR DRY BULB TEMPERATURE
70 F
72 F
75 F
80 F
–14
–13
–11
–8
–3
–2
–1
3
5
7
9
11
12
13
15
18
18
19
21
26
In regions where winter temperatures are extreme,
Carrier’s total energy recovery wheels can be used effectively with specific frost control strategies, such as:
• Preheat frost control, a universally applicable strategy
which meets all design requirements.
• On/Off control.
• Exhaust only using the exhaust air defrost control.
NOTE: Refer to ASHRAE for bin data in cold climates
where the threat of wheel frosting is frequent. Consult this
information to ensure appropriate preheat techniques are
used during occupied times.
Frost prevention methods — Frost control is required
in extremely cold climates to preserve performance and
assure the continuous supply of outdoor air. Enthalpy
wheel frost control strategies take advantage of inherently
low frosting thresholds. This results in minimized energy
use and maximized design load reductions. In regions
that experience extreme winter conditions, the following
frost control techniques can be effective when properly
controlled:
Preheat frost control — Preheat frost control is one of the
many methods of preventing frost formation and ensuring
design outdoor air ventilation rates for the most extreme
winter applications. For continuous operation below the
frost threshold temperature, a preheat coil may be configured into the energy recovery section in the outdoor airstream just before the energy wheel. The frost control
heating coil should be controlled to maintain a supply-air
temperature approximately 5º F above the frost threshold
for a given condition.
Refer to the Preheat Frost Control Temperatures and
Capacity table for the required capacity (in degrees F) that
is required to ensure that the preheat temperature is where
it should be to prevent frost formation.
Note that the required preheat temperature at design is
always below the frosting threshold for a given condition.
This is due to the fact that preheating lowers the relative
humidity of the outside air entering the wheel, effectively
lowering the frost threshold for any given set of indoor air
conditions. This reduces the preheater capacity slightly and
minimizes the preheater operating expense at design
temperatures.
Preheat coil sizing — The Btu requirement for preheat is
a function of the cfm of incoming outdoor air and the temperature difference (T) between the preheat temperature
at the lowest anticipated operating temperature. The Btu
requirement will be calculated by the 62E selection software. The Btu requirements may also be calculated with
the following formula:
Required Btuh = 1.08 x cfm x required T (ºF)
OR
kW = Required Btuh/3414
For example:
System outdoor air required: 3200 cfm
Return air temperature: 70 F
Return air relative humidity: 30%
Outdoor winter design temperature: –5 F
From the Preheat Frost Control Temperatures and
Capacity Requirements at Selected Indoor and Outdoor
Conditions table, temperature T = 6 F
Btuh = 1.08 x cfm x T (ºF)
Btuh = 1.08 x 3200 x 6
Btuh = 20,736
Required kW = Btuh/3414
Required kW = 20,736/3414 = 6.1 kW
The preheat set point should correspond to the frost
thresholds listed in the Frost Thresholds Temperature table
on this page.
On/off control — Use ON/OFF control for intermittent
ventilation below the frost threshold temperature. A control scheme would disable the energy wheel system when
the outdoor-air temperature drops down to the frost
threshold temperature. The system would be controlled on
when the outside air conditions permit. On/off control
should only be used if the following considerations make
intermittent ventilation acceptable:
• Temperatures below the frost threshold (temperature
when the natural ventilation rate is highest because of
maximum indoor/outdoor temperature differential)
occur for a limited amount of time.
• Temperatures below the winter design temperature usually occur during early morning hours. Depending on
the application, these low temperatures may only occur
during unoccupied periods when ventilation is not
required.
Frost protection option — This method allows the exhaust
fan to operate below the frost threshold temperature; however, a temperature sensor would disable the supply fan
when the outdoor-air temperatures reach the frost control
set point. The outdoor-air temperature sensor is located in
the outdoor air intake of the ERV section. To avoid depressurization of the space, fresh air dampers may be required
as part of the building’s ventilation system.
61
Application data (cont)
PREHEAT FROST CONTROL TEMPERATURES AND CAPACITY (T) REQUIREMENTS
AT SELECTED INDOOR AND OUTDOOR CONDITIONS (F)
OUTDOOR
WINTER
DESIGN
TEMP (F)
5
0
–5
–10
–15
–20
–25
–30
–35
–40
70 F and 20% RH
Preheat
Required
Temperature
Capacity (F)
Design (F)
—
—
—
—
—
—
—
—
–9
6
–11
9
–13
12
–14
16
–15
20
–16
24
LEGEND
RH — Relative Humidity
62
INDOOR AIR (RETURN) CONDITIONS
70 F and 30% RH
Preheat
Required
Temperature
Capacity (F)
Design (F)
—
—
—
—
1
6
–1
9
–3
12
–4
16
–5
20
–6
24
–6
28
–7
33
70 F and 40% RH
Preheat
Required
Temperature
Capacity (F)
Design (F)
—
—
8
8
6
11
4
14
3
18
2
23
2
27
1
31
1
36
1
41
Guide specifications
Packaged Energy Recovery Ventilator
HVAC Guide Specifications
Size Range: 350 cfm to 25,000 cfm, Nominal
Carrier Model Numbers: 62E
Part 1 — General
1.01 SYSTEM DESCRIPTION
One-piece energy recovery ventilation (ERV) unit is
an electronically controlled ventilation air preconditioner utilizing an AHRI 1060 certified energy
recovery cassette to reduce the cooling and heating
loads placed on the primary HVAC unit by untreated
outdoor air. Building exhaust air shall be introduced
to the ERV unit through ductwork or by a specially
designed transition connected to a Carrier rooftop
unit. Unit shall be designed to function as a standalone ERV or may be used in conjunction with a
packaged HVAC unit.
1.02 QUALITY ASSURANCE
A. Unit shall be designed in accordance with UL Standard 1995 version 3.
B. Unit shall be ETL tested and certified.
C. Roof curb shall be designed to conform to NRCA
standards.
D. Insulation and adhesive shall meet NFPA 90A
requirements for flame spread and smoke
generation.
E. Unit casing shall be capable of withstanding ASTM
No. 141 (Method 6061) 500-hour salt spray test.
F. Unit shall be AHRI 1060 certified, latest edition.
Part 2 — Products
2.01 EQUIPMENT (Standard)
A. General:
The ERV unit shall be a factory assembled, singlepiece unit. Contained within the unit enclosure shall
be all factory wiring with a single, pre-determined
point of power input and a single point of 24-volt
control wiring.
B. Unit Cabinet:
1. Unit cabinet shall be constructed of galvanized
steel coated with a pre-painted baked enamel
finish.
2. Unit shall have hoods installed over outside air
intake and exhaust openings.
3. The cabinet shall be insulated on the tempered
side of the ERV with 1-in. insulation in a
double-walled compartment.
4. The exhaust airstream shall have a back draft
damper to prevent air penetration during off
cycles.
5. The ERV wheel shall be in a horizontal position
in the unit for vertical supply/return configuration units (62EB-EU). The ERV wheel shall be
in a vertical position in the unit for horizontal
supply/return configuration units (62E2-E7).
C.
D.
E.
F.
G.
6. Pressure test ports shall be factory-installed on
the outside of unit cabinet. They shall allow
measurement of ERV wheel pressure drop on
both the intake and exhaust sections to facilitate
blower setup and air balancing.
7. Eye-bolts are provided to facilitate rigging.
Blowers:
1. 62E cabinets (all except 62EB,E7 units):
Blowers shall be single-width, single-inlet backward inclined blades with direct-drive motors.
Direct-drive motors shall be electronically commutated (EC) motors with built-in variable frequency drive. The blowers shall not use belts or
pulleys.
2. 62EB,E7 cabinets only:
Blowers shall be double-width, double-inlet type
with forward-curved blades and direct-drive
motors. Units shall have four-speed motors.
3. Blower wheel shall be made from steel with a
corrosion resistant finish and shall be a dynamically balanced.
4. Blowers shall be mounted on neoprene vibration isolation pads.
5. Motors shall be high efficiency and have thermal overload protection.
Filter Section:
Standard filter section shall accept commercially
available, 2-in. pleated filter(s).
Controls and Safeties:
1. The unit shall be microprocessor controlled.
2. The operator interface shall consist of a back-lit
LCD (liquid crystal diode) screen, pushbutton
and potentiometer. These are used to adjust airflows and control parameters and display operating airflows and alarms. No belts or pulleys
are adjusted to set airflows.
Electrical Requirements:
All unit power wiring shall enter unit cabinet at a single location.
Energy Recovery Cassette:
1. Energy wheel performance shall be AHRI Standard 1060 certified and bear the AHRI certified
product seal.
2. The energy recovery cassette shall be a UL recognized component for electrical and fire
safety.
3. The wheel shall be coated with silica gel desiccant, permanently bonded without the use of
binders or adhesives.
4. Coated wheels shall be washable with detergent
or alkaline coil cleaner and water.
5. The silica gel shall not dissolve or deliquesce in
the presence of water or high humidity.
6. The substrate shall be made of a lightweight
polymer and shall not degrade or require
63
Guide specifications (cont)
additional coatings for application in coastal
environments.
7. The wheel polymer layers shall be wound continuously with one flat and one structured layer
in an ideal parallel plate geometry providing
laminar flow and minimum pressure drop.
8. The polymer layers shall be captured in a stainless steel wheel frame or aluminum and stainless steel segment frames that provide a rigid
and self-supporting matrix.
9. Energy recovery wheels greater than 19 inches
in diameter shall be provided with removable
wheel segments.
10. Wheel frame shall be a welded hub, spoke and
rim assembly of stainless, plated, and or coated
steel and shall be self supporting without the
wheel segments in place.
11. Wheel segments shall be removable without
the use of tools to facilitate maintenance and
cleaning.
12. Wheel rim shall be continuous rolled stainless
steel and the wheel shall be connected to the
shaft by means of taper locks.
13. Wheel bearings shall provide an L-10 life of
400,000 hours.
14. Drive belts of stretch urethane shall be provided
for wheel rim drive without the need for external tensioners or adjustment.
H. Special Features:
1. Sensible Energy Recovery Wheel:
The energy recovery wheel shall only transfer
sensible energy.
2. Mechanical Purge:
An adjustable mechanical purge sector shall
allow for a portion of the ventilation air to be
redirected to the exhaust airstream in order to
reduce the exhaust air transfer ratio.
3. EzERV Controls:
Replaces standard pressure test ports with
transducers for automated airflow control:
a. Constant volume supply and exhaust with
manual offset air control:
Unit will control outside air volume to user
specified airflow. Unit will control exhaust
air volume to user specified differential airflow vs. outside air.
b. Modulating supply with CO2 control and
exhaust air tracking with manual offset:
Unit will control outside air volume to
maintain a user-specified CO2 level. Unit will
control exhaust air volume to user-specified
differential airflow vs. outside air. A CO2
sensor is included with this option.
64
4.
5.
6.
7.
c. Constant volume supply, modulating
exhaust with building pressure control:
Unit will control outside air volume to userspecified airflow. Unit will control exhaust
air volume to maintain a user-specified building static pressure. A building static pressure
sensor is included with this option.
d. Modulating supply with CO2 control, modulating exhaust with building pressure control:
Unit will control outside air volume to maintain a user-specified CO2 level. Unit will control exhaust air volume to maintain a userspecified building static pressure. A building
static pressure sensor is included with this
option.
Pre-Heater Option:
Electric pre-heater is factory-installed on the
outside air intake to the ERV. A static pressure
sensor detects static increase on ERV wheel due
to frost build-up. This activates the pre-heater if
temperature is below its set point and static is
detected across the ERV wheel.
Frost Protection Option:
a. Factory-installed frost protection module
shall sense pressure differential across the
energy recovery cassette.
b. Supply blower shall be shut off if the pressure differential across the energy recovery
cassette exceeds an adjustable set point.
Blower shall remain off for an adjustable
time period.
c. Exhaust blower and wheel shall remain in
operation in order to remove any frost buildup on the wheel.
ERV Wheel Variable Frequency Drive Frost
Protection:
a. Factory-installed frost protection module
shall sense pressure differential across the
energy recovery cassette.
b. The ERV wheel is temporarily slowed down
to allow the wheel to be defrosted. Once the
frost build-up is eliminated, the ERV wheel
will return to normal operating speed.
c. Supply and exhaust blowers shall remain in
operation.
Low Temperature Lockout Option:
A factory-installed lockout thermostat shall deenergize the ERV to prevent extremely cold
outside air from entering the space. Lock-out
set point shall be field-adjustable from – 30 F to
100 F.
8. Fused Disconnect Switch Option:
NEMA 3R fused disconnect switch shall be factory installed. Disconnect shall be sized to handle the ERV unit and pre-heaters (when factoryinstalled). Fuses shall be included.
9. Non-Fused Disconnect Switch Option:
NEMA 3R non-fused disconnect switch shall be
factory-installed. Disconnect shall be sized to
handle the ERV unit and pre-heaters (when
factory-installed).
10. Filter Maintenance Indicator:
Pressure drop across the outside air and
exhaust air filters is monitored. When a high
static due to dirty filters is detected, the ERV
LCD displays the alarm and a dry contact is
activated. It shall not interrupt ERV operation.
Switch set point shall be adjustable.
11. ERV Wheel and Blower Maintenance
Indicators:
The outside air and exhaust air blower/motors,
and ERV wheel, are monitored for proper
operation. If a problem is detected, the ERV
LCD displays the alarm and a dry contact is
activated.
12. Motorized Supply Damper Option:
The supply damper shall be motorized with
factory-installed, 2-position, 24-volt motor.
Damper shall close when the ERV is off.
13. Motorized Exhaust Damper Option:
The exhaust damper shall be motorized with
factory-installed, 2-position, 24-volt motor.
Damper shall close when the ERV is off.
14. Rooftop Economizer Option with Power Relief:
When used in conjunction with the rooftop
unit's economizer, the ERV outside air blower
will be turned off, the ERV exhaust blower will
be kept on, and the ERV wheel will be energized periodically to prevent contamination
build-up on the ERV wheel during the "freecooling" operation of the rooftop unit.
15. Rooftop Economizer Option, Shutdown ERV:
When used in conjunction with the rooftop
unit's economizer, the ERV will be completely
shut down during the "free-cooling" operation
of the rooftop unit.
16. Remote Timer Accessory:
During planned occupancy periods, the remote
timer accessory shall allow the unit to be
activated.
17. Remote Readout Accessory:
Remote readout allows for remote display of
ERV operating status and alarms.
18. Roof Curb Accessory:
Roof curb shall be formed of 14-gage galvanized steel with wood nailer strip and shall be
capable of supporting entire unit weight.
19. Combination Energy Recovery Ventilator —
Rooftop Unit (ERV-RTU) Roof Curb Accessory:
The ERV-RTU curb shall be fully assembled to
support both the rooftop unit and ERV. Curb
assembly shall contain internal transitions
between the ERV supply and exhaust connection and the return air path to the RTU. No
external connection shall be required. Curb
shall contain barometric dampers to allow selfadjusting variable airflow between the exhaust
and return air paths. Curb assembly shall allow
use of rooftop unit's standard economizer and
power exhaust components.
20. Drop-In Damper Box Accessory:
Drop-in damper box shall contain barometric
dampers to allow self-adjusting variable airflow
between the exhaust and return air paths.
Damper box shall fit into the rooftop unit's standard roof curb return opening. Damper box
shall have duct connections for exhaust air to
ERV and supply air from ERV. The drop-in
damper box allows for the ERV to be positioned independently from the RTU location
with up to 100 ft equivalent duct per run
between the ERV roof curb and RTU damper
box.
21. Horizontal
Supply/Return
ERV
Base
Accessory:
The horizontal ERV base transitions the unit's
bottom supply and exhaust openings to horizontal connections.
22. Horizontal ERV-to-RTU Transition Accessory:
The horizontal transition accessory is designed
to fit between the ERV horizontal base and the
RTU's horizontal return connection. Transitions
are shipped fully assembled and are constructed
of pre-painted steel to match the finish of the
HVAC unit and the ERV unit. One in., 2-lb
insulation is factory-installed.
23. Post-Heater:
Electric post-heater shall be factory-installed on
the outside air discharge from the ERV.
24. Three-Stage Electric Pre-Heater Control:
Electric pre-heater shall have 3 stages of capacity control.
25. Three-Stage Electric Post-Heater Control:
Electric post-heater shall have 3 stages of
capacity control.
26. BACnet Communication Interface Option:
A controller based module shall provide ERV
communication access via BACnet MasterSlave/Twisted-Pair
(MS/TP),
MODBUS
Remote Terminal Unit (RTU) or Johnson N2
protocols. The protocol choice is field selectable with no additional programming.
65
Guide specifications (cont)
27. LON Communication Interface Option:
A controller based module shall provide ERV
communication access via LON FT-10A ANSI/
EIA-709 protocol.
28. ComfortLink™ Interface Device:
Shall provide a control interface through the
LEN (local equipment network) between the
66
62E unit and a Carrier rooftop unit using the
ComfortLink DDC (direct digital controls) control system. This interface shall provide optimal
system operation by sharing unit data and properly coordinating energy recovery, economizer,
and power exhaust operation.
Carrier Corporation • Syracuse, New York 13221
8-10
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Section 8
Pg 68
Catalog No. 04-52620009-01
Printed in U.S.A.
Form 62E-3PD
Replaces: 62E-2PD
Tab
8d
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