nuair NU0820 User manual

Document # CSM001 Revision Date: August 9, 2016
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COMPLIANT SERIES
H
HR RV V/ /E ER RV V P PR RO OD DU UC CT T M MA AN NU UA AL L
N
NU U0 08 82 20 0/ /N NU U2 20 03 35 5/ /N NU U2 25 54 40 0/ /N NU U1 10 03 30 0
* LEAVE THIS DOCUMENT WITH THE BUILDING OWNER
Specifications, dimensions and ratings may change without notice
as a result of ongoing product development and improvements.
P.O. Box 2758 Windsor, Nova Scotia, B0N 2T0
Ph. 902-798-2261 Fax: [phone]
www.nu-airventilation.com email: [email protected]

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TABLE OF CONTENTS
1ABOUT THE H/ERV........................................................................................................................................4
2PRODUCT SELECTION..................................................................................................................................5
3Nomenclature ....................................................................................................................................................6
3.1 NU0820 .........................................................................................................................................6
3.2 NU1030, NU2035, NU2540..........................................................................................................7
4Sample Specification .........................................................................................................................................8
5Dimensional Data............................................................................................................................................11
5.1 NU0820 .......................................................................................................................................11
5.2 NU1030 .......................................................................................................................................13
5.3 NU2035 .......................................................................................................................................14
5.4 NU2540 .......................................................................................................................................15
5.5 NU0820 Curb .............................................................................................................................16
5.6 NU1030 and NU2540 Curb.......................................................................................................17
6PERFORMANCE DATA –EFFECTIVENESS............................................................................................18
6.1 NU0820 & NU1030 ....................................................................................................................18
6.1.1 HRV.................................................................................................................................................18
6.1.2 ERV .................................................................................................................................................18
6.2 NU0820 Face and By Pass.........................................................................................................19
6.2.1 HRV.................................................................................................................................................19
6.2.2 ERV .................................................................................................................................................19
6.2.3 .........................................................................................................................................................19
6.3 NU1030 face and by Pass ..........................................................................................................20
6.3.1 HRV.................................................................................................................................................20
6.3.2 ERV .................................................................................................................................................20
6.4 NU2035 & NU2540 ....................................................................................................................21
6.4.1 HRV.................................................................................................................................................21
6.4.2 ERV .................................................................................................................................................21
6.5 NU2035 & NU2540 Face and By Pass......................................................................................22
6.5.1 HRV.................................................................................................................................................22
6.5.2 ERV .................................................................................................................................................22
7PERFORMANCE DATA –FANS..................................................................................................................23
7.1 NU0820 HRV..............................................................................................................................23
7.2 NU0820 HRV Face and By Pass...............................................................................................23
7.3 NU0820 ERV..............................................................................................................................24
7.4 NU0820 ERV Face and By Pass................................................................................................24

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7.5 NU1030 HRV..............................................................................................................................25
7.6 NU1030 HRV Face and By Pass...............................................................................................25
7.7 NU1030 ERV..............................................................................................................................26
7.8 NU1030 ERV Face and By Pass................................................................................................26
7.9 NU2035 & NU2540 HRV...........................................................................................................27
7.10 NU2035 & NU2540 Face and By Pass HRV.......................................................................27
7.11 NU2035 and NU2540 ERV...................................................................................................28
7.12 NU2035 and NU2540 ERV face and by pass......................................................................28
8Performance Data –Drives.............................................................................................................................28
9ELECTRICAL Data .......................................................................................................................................29
9.1 Motors –all units.......................................................................................................................29
9.2 Electrical Schematics.................................................................................................................29
10 Installation.......................................................................................................................................................40
10.1 Remote Control.....................................................................................................................40
10.1.1 INSTALLATION INSTRUCTIONS...............................................................................................40
10.2 Installation Basics.................................................................................................................40
10.3 Mounting The Unit (Roof Top Units) .................................................................................40
10.4 Connecting To Other Equipment........................................................................................42
10.5 Controls And Electrical Connection...................................................................................42
10.6 Balancing The System..........................................................................................................43
10.7 COMMISSIONING AND START UP - COMPLIANT SERIES....................................44
11 MAINTENANCE.............................................................................................................................................46
a. FILTERS....................................................................................................................................46
b. FANS...........................................................................................................................................46
c. MOTORS....................................................................................................................................46
d. BELTS ........................................................................................................................................46
e. CONDENSATE DRAIN ...........................................................................................................46
f. CORE..........................................................................................................................................46
g. EXTERIOR HOODS.................................................................................................................47
12 WARRANTY:...................................................................................................................................................48

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1ABOUT THE H/ERV
The heat recovery ventilator (HRV) provides fresh air to a conditioned space while
exhausting an equal amount of stale air. Heat energy is transferred from one air
stream to the other within a non-contact cross flow heat exchanger. ERV models
transfer latent energy (moisture) from the higher to lower air stream.
A. Two fan motor sets deliver fresh air into the space and exhaust stale air from the
space.
B. Incoming fresh air is filtered before flowing through the heat exchange core.
C. Stale air flows through the cross-flow heat exchanger and transfers the heat
(HRV) (and moisture (ERV)) to the incoming fresh air.
D. Warm fresh air is distributed through an independent ductwork system or an
existing air distribution system.

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2PRODUCT SELECTION
Unit Options
NU0820
NU2035
NU1030
NU2540
Capacity (cfm range)
800 -
2000
2000 -
4000
1000 -
3000
2000 -
4000
Location
Indoor
O
S
Outdoor
O
S
S
Defrost
None
S
S
S
S
Exhaust Only (temperature on/off)
$
$
$
$
Timed Exhaust(temperature on/timed off)
$
$
$
$
Recirculation
$
*Face and by Pass
$
$
$
$
208-240/1 1 speed
S
S
S
S
Voltage and Speeds
240/1 1 speed
O
O
O
O
208/3 1 speed
O
O
O
O
460/3 1 speed
O
O
O
O
575/3 1 speed
O
O
O
O
Core
Polypropylene
S
S
S
S
Enthalpy
$
$
$
$
Cabinet Finish
Galvanized Steel
S
S
S
S
Painted Aluminum (white)
$
$
$
$
Supply air Dampers
None
S
S
S
S
Motorized
$
$
$
$
Exhaust Air
Dampers
None
S
S
S
S
Gravity
$
$
$
$
Supply Air discharge
Horizontal (end)
O
S
O
O
Vertical (down)
O
S
S
Return air intake
Horizontal (end)
O
S
$
$
Vertical (down)
O
S
S
VFD
$
Premium efficiency motors 89.5% & VFD compatible
$
$
$
$
Dirty Filter contacts
$
$
$
$
Auxiliary contacts –e.g. interlock
S
S
S
S
S - standard
*
refer to motor hp tables for cfm limitations
O –optional for no additional
charge
$ - optional for additional
charge

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3NOMENCLATURE
3.1 NU0820
Defrost Recommendations*
Type Winter Design Temperature Factory default timing
Celsius Fahrenheit
0 - none > -5 > 23
1 - fan shut down > -10 > 14 Run Defrost
2 - timed fan shut down > -15 > 5 36 min 6 min
3 - recirculation <-15 <5 36 min 6 min
4 - face&by pass uninterrupted ventilation and free cooling
(field adjustable)
* not withstanding other design considerations such as building pressure,
preheat, delivered air temperature, etc.
NU0820 Port and Defrost Configurations 1 - Outside Air (OA) 2 - Supply Air (SA) 3 - Return Air (RA) 4 - Exhaust Air (EA)
1 4 2 4 1 3 2 3
A B C D
3 2 3 1 4 2 4 1
Defrost Options A,E Defrost Options B,F Defrost Options C,G Defrost Options D,H
0 None 0 None 0 None 0 None
1 Fan Shut Down 1 Fan Shut Down 1 Fan Shut Down 1 Fan Shut Down
2 Timed Fan Shut Down 2 Timed Fan Shut Down 2 Timed Fan Shut Down 2 Timed Fan Shut Down
3 2 sided Recirculation 3-4-1-2 3 1 sided Recirculation 3-4-2 3 1 sided Recirculation 3-1-2 3
Recirculation N/A
4Face and by Pass (1200 cfm max) 4Face and by Pass (1200 cfm max) 4Face and by Pass (1200 cfm max) 4Face and by Pass (1200 cfm max)
4 1 4 2 3 1 3 2
E F G H
2 3 1 3 2 4 1 4
NU0820 Port and Defrost Configurations 1 - Outside Air (OA) 2 - Supply Air (SA) 3 - Return Air (RA) 4 - Exhaust Air (EA)
1 4 2 4 1 3 2 3
A B C D
3 2 3 1 4 2 4 1
Defrost Options A,E Defrost Options B,F Defrost Options C,G Defrost Options D,H
0 None 0 None 0 None 0 None
1 Fan Shut Down 1 Fan Shut Down 1 Fan Shut Down 1 Fan Shut Down
2 Timed Fan Shut Down 2 Timed Fan Shut Down 2 Timed Fan Shut Down 2 Timed Fan Shut Down
3 2 sided Recirculation 3-4-1-2 3 1 sided Recirculation 3-4-2 3 1 sided Recirculation 3-1-2 3 Recirculation N/A
4Face and byPass (1200 cfm max) 4Face and byPass (1200 cfm max) 4Face and byPass (1200 cfm max) 4Face and byPass (1200 cfm max)
5 Econmizer/face and by pass 5 Econmizer/face and by pass 5 Econmizer/face and by pass 5 Econmizer/face and by pass
4 1 4 2 3 1 3 2
E F G H
2 3 1 3 2 4 1 4
Each Port in a configuration can be horizontal or vertical. See Nomenclature

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3.2 NU1030, NU2035, NU2540
1 4 2 4 1 3 2 3
A B C D
3 2 3 1 4 2 4 1
4 1 4 2 3 1 3 2
E F G H
2 3 1 3 2 4 1 4
1 - OA 2 - SA 3 - RA 4 - EA
NU1030 & NU2540
Not Available in these models
NU2035
Not Available in these models

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4SAMPLE SPECIFICATION
GENERAL
System description:
Packaged Heat (Energy) Recovery Ventilator capable of transferring sensible
(sensible and latent) energy designed to be used as a standalone ventilation system
or as part of an engineered HVAC system with flat plate, cross flow heat
exchanger integral to the unit.
Quality Assurance
Unit shall be constructed to CSA C22.2 standards and carry the mark label of an
approved certifying body. Unit shall undergo 100% functionality testing at the
factory prior to shipping. Heat exchangers shall be certified and currently listed
AHRI and shall meet UL 94 flame spread and smoke generation requirements.
Storage and Handling
Unit shall not be used during construction. Unit shall be stored and handled
according to the manufacturer’s instructions.
Warranty
Unit shall have a 2 year warranty on all parts except the core which has a 15 year
warranty (polypropylene) or 5 year warranty (enthalpy).
EQUIPMENT
Construction
The cabinet shall be double wall construction. 22 Ga. galvanized steel inner wall
and 22 Ga. galvanized steel (0.050 painted white aluminum) outer wall. The unit
shall be insulated with 1” R4 expanded polystyrene. All serviceable components
shall be accessible through a hinged front access panel.
The heat exchanger core shall be easily removable for servicing.

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Blowers
Blowers shall be FC DWDI, dynamically balanced and operate at not more than
1500 rpm. Internal vibration isolation is not required. Blower housing shall be
galvanized steel.
Motors
Motors shall be continuous duty, permanently lubricated with a service factor of
1.15, matched to the fan load and required voltage and phase. Motors enclosure
shall be Totally Enclosed.
Electrical requirements
The unit shall have a single point power connection within a NEMA4 enclosure
with integral non-fused disconnect switch.. The unit shall be c/w 24 VAC control
transformer with 200 VA for internal and remote controls.
Filtration
Unit shall come complete with 2” thick MERV 8 filters (standard).
Unit shall come complete with 2” thick MERV 13 filters (optional).
Heat exchanger
Polypropylene core constructed of flame retardant material and certified and
currently listed with AHRI to Standard 1060.
Enthalpy core shall be constructed of a washable polymer membrane, treated with
permanent Microban® antimicrobial protection to resist mould and odour causing
bacteria, have latent energy transfer properties, flame retardancy, certified and
currently listed with AHRI to Standard 1060.

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Defrost
1. None - the unit may be ordered without defrost ability
2. Exhaust only defrost –a temperature sensor shuts down the supply fan when
the leaving exhaust air is cold enough to freeze condensate. The supply fan
remains off until the leaving exhaust air has reached +8C (47 F). The defrost
sensor will allow some field adjustment of the initiation temperature.
3. Timed fan defrost –a temperature sensor shuts down the supply fan when
the outside air is cold enough to freeze condensate. The supply fan remains off for
a set length of time. The supply fan resumes normal operation for a set length of
time and the cycle repeats as long as the outside air temperature is below the set
point. Both defrost and run cycles shall be field adjustable via the unit’s control.
4. Recirculation Defrost (NU0820) –a temperature sensor initiates defrost
when outside air is cold enough to freeze condensate. The exhaust fan shuts down,
the recirculation damper opens, the gravity and motorized back draft dampers
close. The defrost cycle occurs for a field selectable length of time followed by a
field selectable time of normal operation. The cycle repeats as long as the outside
air temperature warrants.
5. Face and by Pass –a temperature sensor initiates by pass mode when the
leaving exhaust temperature is cold enough to freeze condensate. Heat recovery is
interrupted and both fans continue to run. Heat recovery mode resumes when the
leaving exhaust temperature is above +8C (47 F).
6. Economizer –Economizer controls are integrated with the face and by pass
damper. Temperature sensors in the RA and OA communicate with an adjustable
temperature sensing relay to enable free cooling when the conditions are suitable.
Variable frequency drive
N0. Unit comes with motor starters.
Yes. Factory shall supply VFD for each motor.
Cabinet
22 Ga. Galvanized Steel
0.050 pre-painted white aluminum
Dirty filter contact
Yes –2 pressure switches with the unit.

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No –pressure switches not supplied.
End switch
An auxiliary contact from each motor starter shall be provided. This contact is
shipped dry but can be made 24VAC by moving a jumper.
Roof Curb
A 14” roof curb shall be supplied by the equipment manufacturer.
5DIMENSIONAL DATA
5.1 NU0820

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5.2 NU1030

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5.3 NU2035

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5.4 NU2540

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5.5 NU0820 Curb

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5.6 NU1030 and NU2540 Curb

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6PERFORMANCE DATA –EFFECTIVENESS
6.1 NU0820 & NU1030
6.1.1 HRV
6.1.2 ERV
NU0820 PolyCore
0
10
20
30
40
50
60
70
80
0500 1000 1500 2000 2500 3000
cfm
Effectivness (%)
Total Effectiveness Summer
Sensible Effectivness Winter
AHRI Rating Point 75%
AHRI Rating Point 100%
Ratings outside the scope of the AHRIEnergy
Recovery Ventilation Certification Program
NU0820 ERV
0
10
20
30
40
50
60
70
80
0500 1000 1500 2000 2500 3000
cfm
Eff%
Sensible Winter
Total Summer
AHRIRating Point 100%
AHRIRating Point 75%
Ratings outside the scope of the AHRI Energy
Recovery Ventilation Certification Program
Model no. EXC-17S-20H-250
Type Plate
Nominal Air Flow (scfm) 550
Pressure drop (inches) 0.35
Leakage Ratings
Diff. Pressure
EATR % OACF
Test 1 -0.5 0.00 1.00
Test 2 0 0.00 1.00
Test 3 0.5 0.00 1.00
Thermal Effectiveness Ratings at 0" Pressure Differential
Sensible Latent Total
100% air Flow Heating 66 30 54
75% air Flow Heating 68 32 56
100% air Flow cooling 80 24 45
75% air Flow Cooling 82 28 49
Net Sensible
Net Latent Net Total
100% air Flow Heating 66 30 54
75% air Flow Heating 68 32 56
100% air Flow cooling 80 24 45
75% air Flow Cooling 82 28 49

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6.2 NU0820 Face and By Pass
6.2.1 HRV
6.2.2 ERV
6.2.3
NU0820 Poly Core, Face and by-pass
0
10
20
30
40
50
60
70
80
0200 400 600 800 1000 1200 1400
cfm
Effectivness (%)
Total Effectiveness Summer
Sensible Effectivness Winter
AHRI Rating Point 75%
AHRI Rating Point 100%
Ratings outside the scope of the AHRI Energy
Recovery Ventilation Certification Program
NU0820 ERV Face and by-pass
0
10
20
30
40
50
60
70
80
0200 400 600 800 1000 1200 1400
cfm
Eff%
Sensible Winter
Total Summer
AHRI Rating Point 100%
AHRI Rating Point 75%
Ratings outside the scope of the AHRI Energy
Recovery Ventilation Certification Program
Model no. EXC-17S-20H-250
Type Plate
Nominal Air Flow (scfm) 550
Pressure drop (inches) 0.35
Leakage Ratings
Diff. Pressure
EATR % OACF
Test 1 -0.5 0.00 1.00
Test 2 0 0.00 1.00
Test 3 0.5 0.00 1.00
Thermal Effectiveness Ratings at 0" Pressure Differential
Sensible Latent Total
100% air Flow Heating 66 30 54
75% air Flow Heating 68 32 56
100% air Flow cooling 80 24 45
75% air Flow Cooling 82 28 49
Net Sensible
Net Latent Net Total
100% air Flow Heating 66 30 54
75% air Flow Heating 68 32 56
100% air Flow cooling 80 24 45
75% air Flow Cooling 82 28 49

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6.3 NU1030 face and by Pass
6.3.1 HRV
6.3.2 ERV
NU1030 Face and By Pass
0
10
20
30
40
50
60
70
80
0200 400 600 800 1000 1200 1400 1600 1800
cfm
Effectivness (%)
Total Effectiveness Summer
Sensible Effectivness Winter
AHRI Rating Point 75%
AHRI Rating Point 100%
Ratings outside the scope of the AHRI Energy
Recovery Ventilation Certification Program
NU1030 ERV
0
10
20
30
40
50
60
70
80
0200 400 600 800 1000 1200 1400 1600 1800
cfm
Eff%
Sensible Winter
Total Summer
AHRIRating Point 100%
AHRIRating Point 75%
Ratings outside the scope of the AHRI Energy
Recovery Ventilation Certification Program
Model no. EXC-17S-20H-250
Type Plate
Nominal Air Flow (scfm) 550
Pressure drop (inches) 0.35
Leakage Ratings Diff. Pressure EATR % OACF
Test 1 -0.5 0.00 1.00
Test 2 0 0.00 1.00
Test 3 0.5 0.00 1.00
Thermal Effectiveness Ratings at 0" Pressure Differential
Sensible Latent Total
100% air Flow Heating 66 30 54
75% air Flow Heating 68 32 56
100% air Flow cooling 80 24 45
75% air Flow Cooling 82 28 49
Net Sensible Net Latent Net Total
100% air Flow Heating 66 30 54
75% air Flow Heating 68 32 56
100% air Flow cooling 80 24 45
75% air Flow Cooling 82 28 49