Airflow AIR 125-R User manual

airflowiaq.com
AIR-METRO IOM 0723
Installation, Operation
and Maintenance Manual
Installation, Operation
and Maintenance Manual
HEAT RECOVERY VENTILATORS &
ENERGY RECOVERY VENTILATORS
HEAT RECOVERY VENTILATORS &
ENERGY RECOVERY VENTILATORS
HRV:
AIR 125-R
ERVs:
AIR 120-ERVR-ECM
AIR 140-ERVF
AIR 180-ERVF-ECM
METRO IOM

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Table of Contents
Shipping and Packing List.......................................................................................................................... 3
Terms and Definitions................................................................................................................................. 3
Application..................................................................................................................................................... 3
Required Tools and Materials.................................................................................................................... 3
Specifications................................................................................................................................................ 4-7
Optional Fan Curve Speeds........................................................................................................................ 8
Dimensional Drawings................................................................................................................................ 10-11
Defrost Overview......................................................................................................................................... 11
Required Ventilation.................................................................................................................................... 12
How the Dehumidistat Works.................................................................................................................... 13
GBC02 Basic Control..................................................................................................................................... 14
GBC03 Basic Control..................................................................................................................................... 15
GBC04 Basic Control..................................................................................................................................... 15
GDXPL03 Deluxe Control.............................................................................................................................. 16
DET01 Wired Timer...................................................................................................................................... 17
DET02 Wireless Timer................................................................................................................................ 17
RX02 Repeater............................................................................................................................................. 17
Overview of Installation Methods.............................................................................................................. 18
Installation Methods - Simplified (Return/Return)................................................................................ 19
Installation Methods - Partially Dedicated.............................................................................................. 20
Installation Methods - Fully Dedicated..................................................................................................... 21
Unit Installation Location and Restrictions............................................................................................. 22
Mounting the Unit........................................................................................................................................ 23
Installing the Drain Connection................................................................................................................. 23
Grilles.............................................................................................................................................................. 24
Grille Fittings................................................................................................................................................. 25
Airflow Weatherhoods................................................................................................................................. 26
Dual Hood Kit................................................................................................................................................. 27
Terminal Blocks............................................................................................................................................. 28
Installation and Operation of DET02 Wireless Timer............................................................................ 29
Installation and Pairing of RX02 Repeater............................................................................................. 30
Installation of DET01 Timer........................................................................................................................ 31
Installation of Third Party Mechanical Timers........................................................................................ 31
Interlocking ERV to Air Handler/Furnace Blower.................................................................................. 31
Electrical Connections................................................................................................................................. 32
Unit Wiring Diagrams................................................................................................................................. 33-34
Unit Dip Switch Orientation....................................................................................................................... 35
Adjusting the EC Motor............................................................................................................................... 36
Balancing the Airflows................................................................................................................................ 36
Manual Balancing......................................................................................................................................... 36-37
Balancing The Airflows – Collar Port Method........................................................................................ 38
Auto Balancing.............................................................................................................................................. 40
Fault Indicator Display Board (FID).......................................................................................................... 41
Troubleshooting............................................................................................................................................ 42
Homeowner Maintenance Information..................................................................................................... 43-44
Installation, Operation and Maintenance Manual
Please read and save these instructions for future reference. Read carefully before attempting to assemble, install, operate or maintain the
product described. Protect yourself and others by observing all safety information. Failure to comply with these instructions will result in voiding
of the product warranty and may result in personal injury and/or property damage.

Package 1 of 1 contains:
1 - Assembled ventilator
1 - Accessories Bag assembly contains the following:
WARNING
Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life.
Installation and service must be performed by a licensed professional HVAC installer (or equivalent) or a service agency.
Shipping and Packing List
Table 1. Accessories Bag Assembly Contents
TYPE UNIT NAME CONTENTS
ERV’s AIR 120-ERVR-ECM
1x Ventilation Label
4x Mounting Brackets
8x Screws
ERV’s AIR 180-ERVF-ECM, AIR 140-ERVF
1x Ventilation Label
4x Mounting Brackets
8x Screws
1x Terminal Block Connection
HRV AIR 125-R
1x Ventilation Label
4x Mounting Brackets
12x Screws
1x Cup Drain Spout
• ERV - Energy Recovery Ventilator.
• HRV - Heat Recovery Ventilator.
• Defrost Mode - to ensure reliable operation during cold weather, the HRV / ERV will automatically cycle through its defrost
mode as needed.
• Dehumidistat - a control device that senses the amount of moisture in the air and activates high-speed ventilation when the air
moisture level exceeds the setpoint.
• Reset - whenever resetting of the HRV / ERV is required, simply unplug the power cord for 30 seconds. The Self-Test will occur
when the HRV / ERV is reconnected.
• Self-Test - each time the HRV / ERV is powered/energized, the self-test function will automatically initiate. During the self-test,
the HRV / ERV will cycle through all the speeds available (1 - 5), test the damper motor operation, and will default back to the
previous operational mode and speed selection. Total self-test duration is approximately 90 seconds.
• Standby Mode - the HRV / ERV is powered/energized and waiting for fan operation to be initiated. For example, the HRV / ERV
is set to Continuous Ventilation Operation Mode at speed 0.
• Thermistor - This is the temperature sensor that measures electrical resistance as outdoor temperatures fluctuate.
• HVI - Home Ventilating Institute.
• HRAI - Heating Refrigeration Air Conditioning Institute.
This equipment is designed to provide fresh air while staleing an equal amount of stale air. The HRV units transfer sensible
(temperature) incoming fresh air and staleing stale air. The ERV units transfer both sensible (temperature) and latent (moisture)
between incoming fresh air and exhausting stale air.
Terms and Definitions
Application
Required Tools and Materials
CAUTION
Potential equipment malfunction or damage. May require repairs and/or void warranty.
Do not interconnect HRV / ERV to other appliances such as Stove Vents, Clothes Dryer Vents, Central Vacuum Systems, Auxiliary Fans, etc.
As with any mechanical equipment, contact with sharp sheet metal edges can result in personal injury.
Take care while handling this equipment and wear gloves and protective clothing.
Field Provided Material
• Low voltage control wire
• Mastic tape
• 1/2” I.D. Drain hose
• Caulking material
• Aluminum foil duct tape
• Zip ties (duct)
• Flexible or rigid, insulated or non-insulated ducts - class II
rated zip ties
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Specifications - ERV Units
Table 2. ERV Specifications
Specifications
Model No. AIR 180-ERVF-ECM AIR 120-ERVR-ECM AIR 140-ERVF
Unit Weight in pounds (kg) 42 (19) 37 (17) 42 (19)
Unit Dimensions Refer to “Dimensional Drawings” on pages 10 & 11.
High Speed (HVI Certified)
Inches wg (Pa) CFM (L/s) CFM (L/s) CFM (L/s)
0.1 (25) 199 (94) 131 (62) 161 (76)
0.2 (50) 191 (90) 123 (58) 150 (71)
0.3 (75) 184 (87) 117 (55) 140 (66)
0.4 (100) 176 (83) 108 (51) 127 (60)
0.5 (125) 167 (79) 97 (46) 117 (55)
0.6 (150) 159 (75) 87 (41) 106 (50)
0.7 (175) 150 (71) 74 (35) 93 (44)
0.8 (200) 140 (66) 57 (27) 81 (38)
0.9 (225) 133 (63) 68 (32)
1.0 (250) 125 (59) 55 (26)
Adjusted Sensible Recovery
Efficiency @ 32°F (0°C)*
@ 64 CFM
(30 L/s) 87%
@ 64 CFM
(30 L/s) 74%
@ 64 CFM
(30 L/s) 83%
Sensible Recovery
Efficiency @ 32°F (0°C)*
@ 64 CFM
(30 L/s) 84%
@ 64 CFM
(30 L/s) 72%
@ 64 CFM
(30 L/s) 77%
Adjusted Sensible Recovery
Efficiency @ -13°F (-25°C)*
@ 72 CFM
(34 L/s) 63%
@ 57 CFM
(27 L/s) 59%
@ 70 CFM
(27 L/s) 66%
Sensible Recovery
Efficiency @ -13°F (-25°C)*
@ 72 CFM
(34 L/s) 62%
@ 57 CFM
(27 L/s) 57%
@ 70 CFM
(27 L/s) 63%
Latent Efficiency 95°F (35°C)* @ 64 CFM
(30 L/s) 52%
@ 64 CFM
(30 L/s) 36%
@ 64 CFM
(30 L/s) 54%
Total Efficiency 95°F (35°C)* @ 66 CFM
(31 L/s) 60%
@ 64 CFM
(30 L/s) 46%
@ 64 CFM
(30 L/s) 53%
*Certified by the Home Ventilating Institute (HVI) according to test procedures developed by HVI members and based on
internationally recognized standards. For performance ratings at other conditions not shown, please visit the HVI website.
Number of speeds available
with GBC02 or GBC04
basic control
N/A 2 2
Number of speeds available
with GBC03
basic control
N/A 1 1
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Specifications - ERV Units
Table 2. ERV Specifications (continued)
Specifications
Model No. AIR 180-ERVF-ECM AIR 120-ERVR-ECM AIR 140-ERVF
Number of speeds available
with GDXPL03 Control 5 5 5
Ventilator Type Energy Recovery Energy Recovery Energy Recovery
Energy Recovery Core Enthalpic Enthalpic Enthalpic
Defrost Type Fan Damper Fan
Balancing Auto-Balance N/A Collar Port
Number of Ports 4 4 4
Pre-Filters Supply & Exhaust
MERV 6 or MERV 13**
** To be ordered separately. Comes in a set of 4 and is installed in the Fresh Side only.
When a MERV 13 filter is installed for the first time, airflow will need to be balanced.
Condensate Drain
Connections:
Spouts: qty. 2 (1/2” o.d.)
Drain Tee: qty. 1 (1/2” o.d.)
No No No
Hanging Strap kit Included No No No
Mounting Brackets Included Yes Yes Yes
Electrical Characteristics: 120 Volts, 60 Hertz, 1 phase
Motor type ECM ECM PSC
*Fan watts @ HVI Test 32°F
(0° C)
@ 64 CFM
(30 L/s), 28W
@ 64 CFM
(30 L/s), 26W
@ 64 CFM
(30 L/s), 77W
Fan Watt Rating 130 84 104
Amp Rating 2 1.4 0.9
* Certified by the Home Ventilating Institute (HVI) according to test procedures developed by HVI members and based on
internationally recognized standards.
For performance ratings at other conditions not shown, please visit the HVI website.
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Specifications - HRV Units
Table 3. HRV Specifications
Specifications
Model No. AIR 125-R
Unit Weight in pounds
(kilograms) 37 (17)
Unit Dimensions Refer to “Dimensional Drawings” on pages 10 & 11.
High Speed (HVI Certified)
Inches wg (Pa) CFM (L/s)
0.1 (25) 140 (66)
0.2 (50) 136 (64)
0.3 (75) 131 (62)
0.4 (100) 127 (60)
0.5 (125) 123 (58)
0.6 (150) 119 (56)
0.7 (175) 112 (53)
0.8 (200) 108 (51)
0.9 (225) 102 (48)
1.0 (250) 95 (45)
Adjusted Sensible Recovery
Efficiency @ 32°F (0°C)*
@ 66 CFM
(31 L/s) 75%
Sensible Recovery
Efficiency @ 32°F (0°C)*
@ 66 CFM
(31 L/s) 68%
Adjusted Sensible Recovery
Efficiency @ -13°F (-25°C)*
@ 70 CFM
(33 L/s) 63%
Sensible Recovery
Efficiency @ -13°F (-25°C)*
@ 72 CFM
(33 L/s) 60%
Latent Efficiency 95°F (35°C)* N/A
Total Efficiency 95°F (35°C)* N/A
*Certified by the Home Ventilating Institute (HVI) according to test procedures developed by HVI members and based on
internationally recognized standards. For performance ratings at other conditions not shown, please visit the HVI website.
Number of speeds available
with GBC02 or GBC04
basic control
2
Number of speeds available
with GBC03
basic control
1
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Specifications - HRV Units
Table 3. HRV Specifications (continued)
Specifications
Model No. AIR 125-R
Number of speeds available
with GDXPL03 Control 5
Ventilator Type Heat Recovery
Heat Recovery Core Aluminum
Defrost Type Damper
Balancing N/A
Number of Ports 4
Pre-Filters Supply & Exhaust
MERV 6 or MERV 13**
** To be ordered separately. Comes in a set of 4 and is installed in the Fresh Side only.
When a MERV 13 filter is installed for the first time, airflow will need to be balanced.
Cup Style Drain
Connection: Yes
Hanging Strap kit Included No
Mounting Brackets Included Yes
Electrical Characteristics: 120 Volts, 60 Hertz, 1 phase
Motor type PSC
*Fan watts @ HVI Test 32°F
(0°C)
@ 66 CFM
(31 L/s), 66W
Fan Watt Rating 130
Amp Rating 2
*Certified by the Home Ventilating Institute (HVI) according to test procedures developed by HVI members and based on
internationally recognized standards.
For performance ratings at other conditions not shown, please visit the HVI website.
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Optional Fan Curve Speeds - ERV Units
Table 4. ERV Optional Fan Curves Speeds (Factory Tested)
Single-Core ERV Units
Model No. AIR 180-ERVF-ECM AIR 120-ERVR-ECM AIR 140-ERVF
Speed 5 - High
IN. wg (Pa) CFM L/s CFM L/s CFM L/s
0.1 (25) 173 81 161 86
0.2 (50) 164 77 90 42 150 71
0.3 (75) 155 73 85 40 140 66
0.4 (100) 145 68 73 34 127 60
0.5 (125) 134 63 59 28 117 55
0.6 (150) 123 58 38 18 106 50
0.7 (175) 111 52 93 44
0.8 (200) 99 47 81 38
0.9 (225) 87 41 68 32
1.0 (250) 74 35 55 26
Speed 4 - Medium High
IN. wg (Pa) CFM L/s CFM L/s CFM L/s
0.1 (25) 147 69 129 61
0.2 (50) 136 64 85 40 118 56
0.3 (75) 125 59 81 38 107 51
0.4 (100) 114 54 64 30 97 46
0.5 (125) 102 48 45 21 86 40
0.6 (150) 89 42 75 35
0.7 (175) 76 36 64 30
0.8 (200) 63 30 53 25
0.9 (225) 49 23 42 20
1.0 (250) 34 16 31 15
Speed 3 - Medium
IN. wg (Pa) CFM L/s CFM L/s CFM L/s
0.1 (25) 127 60 110 52
0.2 (50) 114 54 80 38 99 47
0.3 (75) 100 47 72 34 89 42
0.4 (100) 85 40 55 26 78 37
0.5 (125) 70 33 31 15 67 32
0.6 (150) 53 25 57 27
0.7 (175) 36 17 46 22
0.8 (200) 18 8 36 17
Speed 2 - Medium Low
IN. wg (Pa) CFM L/s CFM L/s CFM L/s
0.1 (25) 100 47 87 41
0.2 (50) 87 41 75 35 77 36
0.3 (75) 73 34 61 29 68 32
0.4 (100) 58 27 35 17 58 27
0.5 (125) 43 20 48 23
0.6 (150) 27 13 39 18
0.7 (175) 29 14
Speed 1 - Low
IN. wg (Pa) CFM L/s CFM L/s CFM L/s
0.1 (25) 81 38 67 32
0.2 (50) 64 30 69 33 57 27
0.3 (75) 48 23 51 24 47 22
0.4 (100) 31 15 19 9 36 17
0.5 (125) 14 7 26 12
0.6 (150)
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Optional Fan Curve Speeds - HRV Units
Table 5. HRV Optional Fan Curves Speeds (Factory Tested)
Single-Core HRV Units
Model No. AIR 125-R
Speed 5 - High
IN. wg (Pa) CFM L/s
0.1 (25) 140 66
0.2 (50) 136 64
0.3 (75) 131 62
0.4 (100) 127 60
0.5 (125) 123 58
0.6 (150) 119 56
0.7 (175) 112 53
0.8 (200) 108 51
0.9 (225) 102 48
1.0 (250) 95 45
Speed 4 - Medium High
IN. wg (Pa) CFM L/s
0.1 (25) 114 54
0.2 (50) 111 52
0.3 (75) 109 51
0.4 (100) 108 51
0.5 (125) 106 50
0.6 (150) 103 49
0.7 (175) 96 45
0.8 (200) 86 41
0.9 (225) 73 34
1.0 (250)
Speed 3 - Medium
IN. wg (Pa) CFM L/s
0.1 (25) 100 47
0.2 (50) 95 45
0.3 (75) 94 44
0.4 (100) 92 43
0.5 (125) 88 42
0.6 (150) 81 38
0.7 (175) 73 34
0.8 (200)
Speed 2 - Medium Low
IN. wg (Pa) CFM L/s
0.1 (25) 80 47
0.2 (50) 79 45
0.3 (75) 77 44
0.4 (100) 74 43
0.5 (125) 69 42
0.6 (150) 64 38
0.7 (175) 59 34
Speed 1 - Low
IN. wg (Pa) CFM L/s
0.1 (25) 65 31
0.2 (50) 58 27
0.3 (75) 55 26
0.4 (100) 53 25
0.5 (125) 50 24
0.6 (150) 42 20
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Figure 3. AIR 140-ERVF & AIR 180-ERVF-ECM
DOOR OPEN VIEW
26 in. (660 mm)
DOOR CLOSED VIEW DOOR CLOSED SIDE VIEW
10 in. (254 mm)
22 in. (559 mm)
6 in. (152 mm)
Collars Collar-mounted
balancing ports
Core
Motorized
Impellers
Filters
Stale Air to Outside
Standard Airflow:
Fresh Air from Outside
Stale Air from Inside
Fresh Air to Inside
Fresh Air to Inside
Mirrored Airflow:
Stale Air from Inside
Fresh Air from Outside
Stale Air to Outside
Dimensional Drawings
Figure 1. AIR 120-ERVR-ECM
Figure 2. AIR 125-R
DOOR OPEN VIEW DOOR CLOSED VIEW DOOR CLOSED
SIDE VIEW
9-3/4 in. (248 mm)
5 in. (125 mm)
Collars Recirculating
Defrost Damper
Core
Motorized
Impellers
Filters
25 3/4 in (654mm)
19 3/8 in. (492 mm)
Stale Air to Outside
Airflow:
Fresh Air from Outside
Stale Air from Inside
Fresh Air to Inside
DOOR OPEN VIEW DOOR CLOSED VIEW DOOR CLOSED
SIDE VIEW
9-3/4 in. (248 mm)
5 in. (125 mm)
Collars Recirculating
Defrost Damper
Core
Motorized
Impellers
Filters
25 3/4 in (654mm)
19 3/8 in. (492 mm)
Stale Air to Outside
Airflow:
Fresh Air from Outside
Stale Air from Inside
Fresh Air to Inside
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The HRV / ERV has an electronically controlled defrost system. The defrost cycle is activated when the outdoor temperature drops
below 27°F (-3°C). Incoming fresh air temperature is constantly measured to determine if defrost is required. The three defrost
settings are:
• At 27°F (-3°C) HRV / ERV runs in defrost for 3 minutes and runs in ventilation for 25 minutes
• At -4°F (-20°C) HRV / ERV runs in defrost for 4.5 minutes and runs in ventilation for 17 minutes
• At -31°F (-35°C) HRV / ERV runs in defrost for 7 minutes and runs in ventilation for 15 minutes
No remote device can override this defrost mode until the cycle is complete. After the cycle is completed, the HRV / ERV defaults
to previous settings. If the cycle is completed and the thermistor continues to measure defrost temperature the defrost cycle is
repeated.
Applicable Units:
AIR 120-ERVR-ECM, & AIR 125-R
During defrost a motor driven damper door mechanism closes off the supply air from outside allowing stale air to recirculate through
the unit’s core. During the defrost portion of the cycle no ventilation is occurring. After the defrost portion of the cycle, the damper
operates in the opposite direction to reopen the fresh air port. The defrost cycle repeats until the temperature rises above 27°F
(-3°C).
Defrost Cycle
Recirculating Damper Defrost
Applicable Units: AIR 140-ERVF, & AIR 180-ERVF-ECM
During defrost the supply fan shuts off while the exhaust fan continues to operate. This allows the heat from the stale air to defrost
the unit’s core. During the defrost portion of the cycle, the unit operates with only exhaust ventilation. After the defrost portion of the
cycle, the supply fan powers on and operates with balanced ventilation. The defrost cycle repeats until the temperature rises above
27°F (-3°C).
Fan Defrost
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Required Ventilation
ASHRAE
• ASHRAE 62.2-2019 is a national standard that provides methods for achieving acceptable indoor air quality in typical
residences. It was developed and is maintained by the American Society of Heating and Air-Conditioning Engineers (ASHRAE).
• This standard recommends Dwelling-Unit Ventilation, which is a mechanical exhaust system, supply system, or combination
thereof.
Formula Method
The Building Ventilation rate is determined based on the floor area and the number of bedrooms, as defined in Section 4.1.1 equation
4-1a.
Formula
(Square feet x 0.03) + (bedrooms + 1) x 7.5 = Required Ventilation
(2000 x 0.03) + (4+1) x 7.5 = 97.5
Table Method
Example: A 2000 square foot building with 4 bedrooms from Section 4.1.1 Table 4-1a, a quick reference table predicts 98 cfm. The
following table complies with ASHRAE Standard 62.2-2019, Section 4.1.1 Table 4-1a, Continuous Whole-Building Ventilation rate in
cfm.
Table 6. Whole Building Ventilation Air Requirements
Floor Area
(Square Feet)
Number of Bedrooms
12345
CFM CFM CFM CFM CFM
<500 30 38 45 53 60
501 - 1000 45 53 60 68 75
1001 - 1500 60 68 75 83 90
1501 - 2000 75 83 90 98 105
2001 - 2500 90 98 105 113 120
2501 - 3000 105 113 120 128 135
3001 - 3500 120 128 135 143 150
3501 - 4000 135 143 150 158 165
4001 - 4500 150 158 165 173 180
4501 - 5000 165 173 180 188 195
For more information about ASHRAE, go to: https://www.ashrae.org.
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How the Dehumidistat Works
When using either the GBC02, GBC03 or the GDXPL03 a built-in dehumidistat is present. The following information is provided on
how it works.
High indoor humidity levels, during the heating season, have become a problem in many well insulated, tight homes. Excessive
condensation on the windows is a visual sign of high indoor humidity levels. High indoor humidity levels can result in mold, mildew
and the eventual degradation of the building structure itself. Your HRV / ERV reduces indoor humidity levels when the outdoor air is
drier than the indoor air.
These conditions usually occur during the heating season when outdoor temperatures are less than 59°F (15°C).
During the heating season, the operation of the HRV / ERV may reduce indoor humidity levels sufficiently to eliminate the
need for further dehumidification. Use the adjustable dehumidistat feature located on the control if your home requires further
dehumidification during the heating season.
The dehumidification function aggressively addresses high indoor humidity levels by initiating high speed ventilation when the indoor
humidity levels rise above the set point on the control. Once the humidity in the house is reduced, the HRV / ERV will revert back to
its previous setting.
It is recommended to operate the HRV / ERV for the first few days without use of the dehumidistat function to observe if a further
dehumidification effect will be required.
The dehumidistat operates in percentage of RH (relative humidity) with 60 being high and 20 being low. If after a few days, further
dehumidification is required (the building is still too humid), set the humidity level to a lower amount.
The average person is comfortable between 30% and 50% RH. The dehumidistat should be set to OFF for all seasons except the
heating season since a dehumidifying effect only occurs when the outdoor air is dryer than the indoor air.
Dehumidification Sensing
Every 6 hours the HRV / ERV will run and sample the outdoor air temperature for 3 minutes (this includes when the unit is in Standby
mode) to read the outdoor temperature. The unit then resumes operations at the selected mode and speed. Dehumidistat Disable or
Dehumidistat Re-enable may be initiated.
Dehumidistat Disable automatically disables the Dehumidistat function on the main wall control when outdoor temperatures exceed
15°C (59°F) for a full 24-hour period. All other HRV / ERV features, and functions operate normally while the Dehumidistat function is
disabled.
Dehumidistat Re-enable automatically re-enables the Dehumidistat function if either the outdoor temperature drops below 15°C
(59°F) for a full 24-hour period or if the HRV / ERV is reset (unplugged for 30 seconds).
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GBC02 Basic Control
Note: The AIR 180-ERVF-ECM CANNOT be controlled by a GBC02 basic control.
The control offers the following features to control your home’s ventilation.
• Two-speed fan setting (LOW / HIGH)
• Standby setting (fan OFF)
• Electronic dehumidistat
• Compatible with wireless timers
• Connect to 3-wire 20 gauge (minimum) low voltage wire.
• Designed to be mounted in a standard 2 x 4” (51 x 102 mm) electrical box or
surface mounted to a wall.
Table 7. GBC02 Basic Control
Settings Icon Description
Turning on the Control Press and release the ON/OFF button. The light above will illuminate.
Setting the Ventilation
Speed
Press and release the Fan Speed button to select LOW or HIGH fan speed. The
corresponding “Indicator Light” will illuminate. If both LO and Hi Indicator Lights are off, the
fan is OFF but will turn ON if required by the Dehumidistat or remote Timer (if installed).
Humidity Control
Your unit will reduce indoor humidity when outdoor humidity levels are lower than indoor
humidity levels. This feature is only effective when the outdoor temperature is below 59˚F
(15˚C).
Setting the Dehumidistat
Press and release the Dehumidistat Button until the Dehumidistat Light is at the desired
setting. After a few seconds the Dehumidistat light will either flash or be on continuous. A
flashing light indicates the humidity level is higher than the setting and the unit is operating
on high speed ventilation. A continuous light indicates the humidity level is lower than
the setting. The Dehumidistat will override the current speed setting to HIGH speed. The
Dehumidistat function can be turned OFF by pressing the button until no Dehumidistat Light
is on. Refer to the “How the Dehumidistat Works” on page 13 of this instruction for a detailed
description of Dehumidistat functionality.
IMPORTANT
Only one control can be installed on the system.
Timers will not function when mode of operation is set to “OFF”, unless specifically installed for that function. Refer to “Installing Standby
Jumper” on page 32.
Figure 4. GBC02 Basic Control
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GBC04 Basic Control
Note: The AIR 180-ERVF-ECM CANNOT be controlled by a GBC04 basic control.
The control offers the following features to control your home’s ventilation.
• Two-speed fan setting (LOW / HIGH)
• Standby setting (fan OFF)
• 20min on / 40min off mode (fan defrost models)
• 20min on / 40min recirculation mode (damper defrost models)
• Compatible with Wireless Timers
• Connect to 3 wire 20 gauge low voltage wire
• Designed to be mounted in a standard 2 x 4” (51 x 102 mm) electrical box or
surface mounted to a wall.
LO
HI
On / OFF
Button
20 / 40 Mode
Button
Fan Speed
Button
Fan Speed
Indicator
20 / 40
Mode
Indicator
Light
On / OFF
Light
20/40
Table 9. GBC04 Basic Control
Settings Icon Description
Turning on the Control Press and release the ON/OFF button. The light above will illuminate.
Setting the Ventilation
Speed
Press and release the Fan button to select LOW or HIGH fan speed. The corresponding “In-
dicator Light” will illuminate. If both LO and Hi Indicator Lights are off, the fan is OFF but will
turn ON if required by the Dehumidistat or remote Timer (if installed).
20/40 Mode 20 / 40
Press and release the 20/40 button. The light above will illuminate. The unit will run 20 min
on / 40 min off mode in fan defrost models and 20 min on / 40 min recirculation mode on
recirculation damper defrost models.
Figure 6. GBC04 Basic Control
GBC03 Basic Control
Note: The AIR 180-ERVF-ECM CANNOT be controlled by a GBC03 basic control.
The control offers the following features to control your home’s ventilation.
• Low-speed fan setting
• Electronic dehumidistat
• 20min on / 40min off mode (fan defrost models)
• 20min on / 40min recirculation mode (damper defrost models)
• Continuous recirculation mode (damper defrost models only)
• Compatible with Wireless Timers
• Connect to 3 wire 20 gauge low voltage wire
• Designed to be mounted in a standard 2 x 4” (51 x 102 mm) electrical box or
surface mounted to a wall.
60%
20%
20/40
Mode
Button
Humidity
Setting
On / OFF
Button
Dehumidistat
Button
Recirculation
Mode
Indicator
20 / 40
Mode
Indicator
Low Fan
Speed
Indicator
Table 8. GBC03 Basic Control
Settings Icon Description
Turning on the Control Press and release the ON/OFF button. The light above will illuminate, and the unit will run at
low speed.
Humidity Control
Your unit will reduce indoor humidity when outdoor humidity levels are lower than indoor
humidity levels. This feature is only effective when the outdoor temperature is below 59˚F
(15˚C).
Setting the Dehumidistat
Press and release the Dehumidistat button until the Dehumidistat Light is at the desired
setting. After a few seconds the Dehumidistat Light will either flash or be on continuous. A
flashing light indicates the humidity level is higher than the setting and the unit is operating
on high speed ventilation. A continuous light indicates the humidity level is lower than
the setting. The Dehumidistat will override the current speed setting to HIGH speed. The
Dehumidistat function can be turned OFF by pressing the button until no Dehumidistat Light
is on. Refer to the “How the Dehumidistat Works” on page 13 of this instruction for a detailed
description of Dehumidistat functionality.
20/40 Mode
Press the Mode Button until the 20/40 mode indicator light is illuminated. The 20/40
mode is a repeating cycle. The fan will run at LOW speed for 20 minutes, then turn OFF for
40 minutes. Some units are equipped to recirculate the air in your home during the 40-minute
cycle with no ventilation. The control will automatically detect this feature and recirculate the
air during the 40-minute cycle at LOW fan speed.
Figure 5. GBC03 Basic Control
airowiaq.com 15

GDXPL03 Deluxe Control
Note: ALL UNITS can be controlled by GDXPL03 deluxe control.
The control offers the most advanced features to control your home’s ventilation.
• Five-speed fan setting
• Standby setting (fan speed 0)
• Electronic dehumidistat
• 20/40/60 HIGH Speed override Button
• Compatible with Wireless Timer
• Easy to read back-lit LCD screen
• Connect to 3-wire 20 gauge (minimum) low voltage wire
• Auto Balancing (applicable units)*
Table 10. GDXPL03 Operational Modes
Function Icon
Continuous Ventilation
20 Minutes On, 40 Minutes Recirculation
20 Minutes On, 40 Minutes OFF
10 Minutes On, 50 Minutes OFF
Continuous Recirculation
Table 11. GDXPL03 Deluxe Control Settings
Mode Icon Description
Turning on the Control Press and release the ON/OFF button. The light above will illuminate.
Setting the Ventilation
Speed
Press and release the Fan button to select one of the five fan speeds. The fan speed will be displayed on
the screen beside to fan symbol. Standby mode (Fan OFF) is indicated as speed 0. The fan will turn ON if
required by a remote timer (if installed).
20/40/60 High Speed
Button
Press and release the 20/40/60 High Speed button to temporarily initiate HIGH Fan speed for 20, 40 or
60 minutes. Press once for 20 minutes, twice for 40 minutes, three times for 60 minutes and four times to
disable. The timer symbol will appear on the screen and the corresponding section of the clock will flash
to indicate the time interval selected. When the timer runs out, the unit will return to its previous operating
speed.
Setting the
Mode of Operation
There are five modes of operation available with the GDXPL03 (see Table 10). Pressing the Mode button will
display the different modes of operation on the screen. Fan defrost models do not have recirculation modes
available.
Setting the Dehumidistat
The GDXPL03 displays the current indoor humidity in LARGE numbers and the Dehumidistat setting in
SMALL numbers on the screen. If the indoor humidity is above the set point, the control will initiate HIGH
Fan speed operation in Ventilation mode until the indoor humidity has been reduced below the set point.
Press and release the Dehumidistat button to adjust the Dehumidistat setting. The Dehumidistat can be
set between 25% RH and 60% RH. To disable the Dehumidistat function on the control, cycle through the
setting until OFF is displayed. Refer to “How the Dehumidistat Works” on page 12 in this instruction for a
detailed description of the Dehumidistat function.
Reset Button RESET The RESET button will clear the current Fan, Timer, Mode and Dehumidistat settings and set the unit into
LOW fan speed, Ventilation mode and a Dehumidistat setting of 40%.
Service Indicator A service indicator appears when the unit requires routine maintenance. Press and hold the ON/OFF button
for 5 seconds to reset the service indicator once maintenance has been performed.
Defrost The defrost symbol will be displayed on the screen of the DXPL-03 when the defrost cycle is engaged and
the unit is actively defrosting.
Wireless Symbol The wireless connection symbol will be displayed on the screen of the DXPL-03 when a wireless signal is
received from the DET-02, RX-02, and when the DXPL-03 is put into wireless pairing mode.
*Refer to “Auto Balancing” on page 40.
Figure 7. GDXPL03 Deluxe Control
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Figure 8. DET01 Wired Timer
Figure 9. DET02 Wireless Timer
Figure 10. Wireless Repeater
DET01 Wired Timer
DET02 Wireless Timer
RX02 Repeater
Timers are available as wired or wireless. The timer will override the operational mode of the
control (regardless of the setting) and initiate HIGH fan speed Ventilation for 20, 40 or 60
minutes. The HRV / ERV will return to the selected operational mode and fan speed setting
upon completion of the timer cycle.
Using Timers
Press the button to initiate high speed ventilation for 20, 40 or 60 minutes. The corresponding
status light will illuminate to indicate either 20, 40 or 60 minutes of high speed fan operation.
Press the button until the status lights are no longer illuminated to cancel high speed timer
operation.
Optional Lockout Mode
The Wired Timer has a lockout mode feature that can be set to disable the timer. Set the
lockout mode by holding the button for five seconds. Disable lock-out mode by holding the
button for 5 seconds. Connect to 3-wire, 20-gauge (min.) low-voltage wire and install in a
standard 2 x 4” (51 x 102 mm) electrical box.
*Refer to “Installation and Operation of DET01 Timer” on page 31.
The DET02 Wireless Timer pairs wirelessly to the control. The DET02 Wireless Timers have an estimated range of 40 feet (12 meters)
with no obstructions. To increase the range of the timer, a RX02 Repeater may be used. Multiple timers can be paired to a single
control. They are designed to be mounted in a standard 2 x 4” (51 x 102 mm) electrical box or surface mounted to a wall.
This device is used to extend the range of the DET02 Wireless Timer. The RX02 Repeater plugs
directly into a 120 V power outlet.
The RX02 Repeater should be installed at the halfway point between the DET02 Minute Wireless
Timer and the control if the timer is out of range.
When the RX02 Repeater is positioned correctly, a solid green LED will illuminate indicating the
RX02 Repeater has a strong connection to the main wall control and may be moved farther away if
necessary.
* Refer to “Installation and Operation of RX02 Repeater” on page 30.
Replacing The Battery
The red LED battery indicator will illuminate when the battery on the
timer needs to be replaced. Replace the battery by:
• Pulling the face plate off the wall.
• Replacing the battery located on the back of the Timer Face Plate.
• Re-attaching the face plate to the back plate. Be careful not to
damage the tabs on the back plate when reattaching the face
plate.
* Refer to “Installation and Operation of DET02 Wireless Timer” on
page 29 for pairing instructions.
Back Plate
Face Plate
airowiaq.com 17

Connecting the Ductwork
The installer must ensure all ductwork is sized and installed as designed to ensure the system will perform as intended.
The amount of air that the HRV / ERV unit will deliver is directly related to the total external static pressure of the system. Static
pressure is a measure of resistance imposed on the blower by the length of ductwork plus the number of fittings used in the
ductwork.
A well designed and installed ducting system will allow the HRV / ERV to operate at its maximum efficiency.
All ducts should be kept as short as possible and have as few bends or elbows as possible to maximize airflow. 45ºelbows are
preferred to 90ºelbows. Use Y-fittings instead of T-fittings whenever possible.
All duct joints must be fastened with screws, rivets or duct sealant and wrapped with mastic or quality duct tape to prevent leakage.
Mastic is preferred but if duct tape is used it should be the aluminum foil type.
Use galvanized (rigid) ducting whenever possible although flexible duct can be used in moderation, if necessary.
A short length (approximately 12 inches [300 mm]) of non-metallic flexible duct should be connected between the HRV / ERV and the
supply/exhaust duct system to avoid possible noise transfer through the duct system.
All ducts running through attics and unheated spaces must be sealed and insulated to code.
IMPORTANT
Applications such as greenhouses, atriums, swimming pools, saunas, etc. have unique ventilation requirements which should be addressed
with an isolated ventilation system.
Overview of Installation Methods
There are three methods of installation for the HRV / ERV:
• Simplified installation - See “Installation Methods - Simplified (Return/Return)” on page 19.
• Partially dedicated installation - See “Installation Methods - Partially Dedicated” on page 20.
• Fully dedicated installation - See “Installation Methods - Fully Dedicated” on page 21.
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Backdraft Damper
Leaf Hinge
Installed Vertically
(Recommended)
Outdoors
Damper for
balancing
airflows
Return Air
Cold Air
Return
Forced Air
Furnace
Stale Air to Outside
Airflow:
Fresh Air from Outside
Stale Air from Inside
Fresh Air to Inside
The simplified method draws stale air from the cold air return duct of the air handler/furnace
and introduces an equal amount of fresh air farther downstream into the cold air return as
illustrated in the following figures.
Key Points
The HRV / ERV unit should be balanced.
• It is recommended that either the furnace blower run continuously or HRV / ERV unit
operation be interlocked with the furnace blower.
* Refer to “Interlocking HRV / ERV to Air Handler / Furnace Blower” on page 31.
• The duct configuration may change depending on the HRV / ERV model. See
specifications for your unit.
• Check local codes and authority having jurisdiction for acceptance.
Installation Methods - Simplified (Return/Return)
Figure 12. Simplified Installation (Return/Return)
Figure 11. Simplified Installation (Return/
Return)
Installation Notes
• See unit specifications for exact port locations (AIR 140-ERVF / AIR 180-ERVF-ECM shown in image below).
• Unit is normally balanced on HIGH speed with the furnace blower ON.
• Ensure as much distance as possible between the supply and exhaust connections to the cold air return of the furnace.
• The exhaust air connection should be upstream of the supply air connection to prevent exhausting any fresh air.
• Weatherhood arrangement is for drawing purposes only. The weatherhoods are to be installed in accordance with local building
codes or manufacturer recommendations.
• The airflow can be confirmed on site using the balancing procedures found in this manual.
airowiaq.com 19

Backdraft
Damper
Leaf Hinge
Installed Vertically
(Recommended)
Outdoors
Damper for
balancing
airflows
Return Air
Cold Air
Return
Forced Air
Furnace
Exhaust Air from various
parts of building.
Stale Air to Outside
Airflow:
Fresh Air from Outside
Stale Air from Inside
Fresh Air to Inside
The partially dedicated installation draws stale air from specific points in the house and
introduces an equal amount of fresh air into the cold air return as illustrated in the following
building figures.
Key Points
The HRV / ERV unit should be balanced.
• It is recommended that the furnace blower run continuously or HRV / ERV operation be
interlocked with the furnace blower to evenly distribute the fresh air throughout the house.
Refer to building code.
* Refer to “Interlocking HRV / ERV to Air Handler / Furnace Blower” on page 31.
• The duct configuration may change depending on the HRV / ERV model. See
specifications for your unit.
• Check local codes and authority having jurisdiction for acceptance.
Installation Notes
• See unit specifications for exact port locations (AIR 140-ERVF / AIR 180-ERVF-ECM shown in image below).
• Unit is normally balanced on HIGH speed with the furnace blower ON.
• Weatherhoods are to be installed in accordance with local building codes or manufacturer recommendations.
• The airflow must be confirmed on site using the balancing procedures found in this manual.
Installation Methods - Partially Dedicated
Figure 13. Partially Dedicated System
Figure 14. Direct Connection of Supply Air Stream to the Furnace Cold Air Return (Stale air drawn from key areas of home)
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