Greenheck Outdoor Air Ventilator Guide

GREENHECK
P.O. BOX 410 SCHOFIELD, WISCONSIN 54476-0410
PH. 715-359-6171
®
Installation, Operation and Maintenance Instructions
for Neutralizer 100% Outdoor Air Ventilators
WARNING:
Improper installation, adjustment, alteration, service or maintenance can cause property damage,
injury or death. Read the installation, operating, and maintenance instructions thoroughly before
installing or servicing this equipment.
This manual is the property of the owner, and is required for future maintenance.
Please leave it with the owner when you complete the job.
Part # 457502
June 1998

2
TABLE OF CONTENTS
Warranty............................................................................................................Pg. 2
Installation Instructions:
NV-45
•Horizontal Discharge................................................................................Pg. 3
•Downblast Discharge............................................................................Pg. 4-5
NV-90 and NV-120
•Slab, Rail, Curb Installation...................................................................Pg. 6-7
•Equipment Supports, Discharge Locations............................................Pg. 8
•Curb Installation .................................................................................Pg. 9-11
•Installing Filter/Coil Section and Weatherhood.................................Pg. 10-11
Electrical Instructions......................................................................................Pg. 12
System Startup.................................................................................................Pg. 13
Coil Instructions..........................................................................................Pg. 14-16
Trouble Shooting..............................................................................................Pg. 17
General Dimensions and Weights.....................................................................Pg. 18
Maintenance.....................................................................................................Pg. 19
Maintenance Notes...........................................................................................Pg. 20
Warranty
Greenheck warrants this equipment to be free from defects in material and workmanship for a
period of one year from the purchase date. Any units or parts which prove to be defective during
the warranty period will be repaired or replaced at our option.
The motor is warranted by the motor manufacturer for a period of one year. Should the motor
prove defective during this period, it should be returned to an authorized motor service station.
Greenheck will not be responsible for any installation or removal costs .
Due to continuing research, Greenheck reserves the right to change specifications without notice.

INTAKE
DISCHARGE
DISCHARGE
INTAKE
C
L
C
L
Equipment
Support
Footprint
C
L
A
A
(fig.4)
Roof mounted arrangement HZ
with weatherhood, mounted on three equipment supports.
Ductwork is attached to discharge collar with rubber
boot transition.
(fig.5)
Arrangement HZ shown as an indoor
hanging installation with intake and
discharge ductwork installed.
(Hanging support structure for unit is by others).
(fig.2) (fig.3)
Step 1 Mounting the Unit
Arrangement HZ can be mounted on a curb
with an equipment support (see curb inst.) or
on three equipment supports (figs.1&4).
Arrangement HZ can also be used for indoor
applications mounted hanging (fig. 5), inline
as part of an air handling system, or base
mounted. Mounting hardware to be provided
by others.
In any case, adequate support of the unit is
required.
Step 2 Attach Ductwork to Unit Discharge
Chart and drawing (fig.2) below shows opening size (ID)
and location for a discharge collar. Also included is the
recommended straight duct length for optimal
performance. Greenheck recommends attaching
ductwork to collar using a rubber duct section at the
unit to eliminate vibration.
Step 3 Attach Ductwork to Unit Intake
For non-weatherhood installations, fig. 3 below shows
dimensions for supply opening (ID). Attach ductwork to
perimeter flange using a rubber duct section at the unit
to eliminate vibration. Design the remaining ductwork
for minimal losses to allow the unit to operate properly.
A -Equip. Support C
L441/4"
(fig.1)
Typical Installations
3
Recommended Duct Size/Location
and Intake Dimensions
Minimum Straight Duct Length - 54”
16
16
48
43
12
23
Installation Instructions for:
NV-45 w/Horizontal Discharge

4
B
C
L
C*
Rectangular
Curb
Footprint
C
L
C
L
A
A/2
A
Roof
Opening
A/2
C*
C*
*C- Determine equal dimension for these 3 locations
Sealant
Ductwork
Duct Adaptor
Supply
Ductwork
by Others
Step 1 Roof Opening
Determine the center of the supply duct roof
opening. The chart below shows the maximum
recommended roof opening dimensions. These
sizes can be smaller based on codes and
ductwork sizes.
A - Max Roof Open. Sq. 47"
Supply Duct C
L to
B - 881/2"
Equip. Support C
L
Before beginning this installation:
Make sure that there is room to access the unit from all sides.
Make sure inlet of unit is located well away from any exhaust fans.
Step 3 Install Ductwork
The chart shows at left shows the duct
sizes and straight lengths recommended
for optimal performance (AMCA Publication
201-90). Using duct sizes less then
recommended lengths will affect fan
performance. Good duct installation
practices should be followed for the
remaining ductwork. The use of a duct
adapter with the supply duct is strongly
recommended to properly align the
ductwork with the supply fan discharge.
The duct adaptor is only a guide and is not
intended to be used as support for the
ductwork.
Step 4 Apply Sealant
Before installing unit apply a sealant or a
gasket around the perimeter of the supply
duct adaptor to isolate the fan and
minimize vibration.
For Installations using rectangular curb
Recommended Supply
Ductwork Sizes
Straight
Duct Duct
Size Length
16 x 16 54"
Installation Instructions for:
NV-45 w/Downblast Discharge
Step 2 Install Roof Curb and
Equipment Support
For rectangular curbs, center curb on 3 sides of roof opening, as shown in above installation diagram, by
determining C dimension (varies per unit/curb size). For either installation, level the curb and shim if necessary.
Attach curb to roof and flash in place.
If equipment support is needed, refer to chart in step 1 for dimensional location based on NV unit size. Attach to
roof in the same manner as the curb. Remove metal cover, flash to wooden nailer, and reinstall cover.

5
Model TSU
Supply Unit
Lifting Lugs
(4 places)
Step 5 Install Supply Unit
Use a crane and a spreader bar
hooked to the factory lifting lugs
(as shown in the diagram) to lift
and center the NV unit on the
curb and equipment support. Use
self-tapping sheet metal screws
to fasten unit to the curb and
equipment support through holes
provided.
Electrical and pipes connections
can be made at this time.
Complete Installation
Illustration shows the complete
installation of downblast NV with
filter section and weatherhood.

6
GREENHECK
®
Before beginning this installation:
Make sure that there is room to access the unit from all sides.
Make sure inlet of unit is located well away from any
exhaust fans.
Installation Instructions for:
SLAB, RAIL, AND CURB MOUNTING
NV-90 and NV-120
w/Horizontal Discharge
Lifting Lugs (4)
Spreader Bar
NV Unit
Intake
1a. Slab Construction
Recommended Size: 1ft. wider and
longer than total unit size.
Recommended Material: Concrete at
least 4" thick.
Slab should be set and leveled on a
sufficient bed of gravel for proper
drainage.
1b. Install Unit
Use a crane and spreader bar to
prevent damage to unit. Lifting lugs are
provided as shown in illustration.
Its is highly recommended that all
accessory items be lifted separately
and attached after the NV unit is in
place.
Unit may be fastened to slab through
lifting lugs.

7
Rails located 6-12" in
from sides of unit.
Rails extend 6" from
end of filter section
Rails extends 6" from
discharge end of unit
Lifting Lugs (4)
Spreader Bar
2. Rail Mounting
For proper support, rails should be located
6-12" in from sides of unit and should
extend at least 6" beyond both discharge
end of unit and filter section.
3. Curb Mounting
(See page 9 for curb assembly)
Install unit on curb using a crane and
spreader bar to prevent damage to unit.
Lifting lugs are provided as shown in
illustration.
It is highly recommended that all accessory
items be lifted separately and attached
after the unit is set in place.

8
Straight
ABCDDuct Length
NV-90 161/424 34 1/2223/881
NV-120 161/4251/234 231/496
5. Attach Ductwork to Unit Discharge
Chart and drawing below show opening size (ID) and location for discharge collar. Also included is the
recommended straight duct lengths for optimal performance. Greenheck recommends attaching
ductwork using a rubber duct section at the unit to eliminate vibration.
Discharge Opening Sizes
Back View
DC
B
A
NV-90 and NV-120
Straight Duct Length
4. Optional Up-stream Heating Coil
If an optional up-stream heating coil is provided with the unit an additional equipment support may be required. If
filters only are provided in this section, additional support is not needed. Follow the guidelines below for
determining the coil section support required. Page 18 lists unit weights for equipment support load
requirements.
Equipment Support Requirements: Slab/Rail Mount Curb Mount
NV-90 None Curb Height
NV-120 12” Curb Height + 12”
Equipment Support
Cement Slab
Coil Section
Typical NV-120 installation
on cement slab with
optional up-stream heating
coil section .
See page 10 for attachment
instructions.

9
Installation Instructions for:
CURB MOUNTING*
NV-90 and NV-120
*For installations using Greenheck's
optional roof curb.
1. Assemble Roof Curb
Curbs are shipped knockdown and require assembly
by others. Assembly instructions are also included
with curb.
Assemble curb sections as shown using hex bolts and
lock nuts supplied with curb.
Detail shown is typical for all four corners.
Recommended
Roof Opening
(36"x36")
1031/2
431/4
405/8
241/4
41/2
Roof Curb
813/16
4. Install Ductwork
The following chart shows the duct sizes and straight
lengths recommended for optimal performance (AMCA
Publication 201-90). Using duct sizes less than
recommended lengths will affect fan performance. Good
duct installation practices should be followed for the
remaining ductwork.
Roof Opening
B
C
D
Ductwork
by Others
Roof Curb
A
Straight
A B C D Duct Length
NV-90 24 93/824 301/481
NV-120 26 91/226 291/496
Duct Locations:
2. Locate and Cut Roof Opening
When locating unit, make sure there is room to access unit
from all sides. Make sure inlet of this unit is located well
away from exhaust fans.
Roof Opening for NV-120 and NV-90 = (A) 36" x (B) 36"
3. Install Curb
Located curb over roof opening with dimensions shown to
the right and fasten in place.
Check that diagonal dimensions are within
± 1/8" of each other and adjust as necessary. Shim as
required to level.

10
5. Install Unit.
Use a crane and spreader bar to prevent damage
to unit. Lifting lugs are provided as shown in
illustration.
It is highly recommended that all accessory items
be lifted separately and attached after the unit is
in place.
Electrical and pipe connections can be made at
this time.
Lifting Lugs (2)
Spreader Bar
Butt units together
Fasten through
both flanges.
KSU Unit Filter/Coil Section
Filter /Coil section fastener locations
typical for entire section.
Top fasteners are accessed from
outside, side fasteners are accessed
from inside, bottom fasteners are
accessed from underneath filter section
(Note: bottom fasteners are not required
for slab mounted units).
Detail A
6. Attach Filter/Coil Section (if included)
Use a crane and spreader bar hooked to factory
lifting lugs (as shown in diagram) to lift and center the filter section on the NV unit. Note that the top U-
shaped flange on the filter section fits over the vertical flange of the NV unit (see detail A). Use sheet metal
screws to fasten the filter section to NV unit. Mounting holes are prepunched, see diagram for approximate
hole locations.
Filters ship separately. To install, remove side panel on filter section and slide into filter channels. Note
arrows on filters for correct orientation.
Note:
If the optional up-stream heating coil
section is included with the unit, special
support for this section is required. See
page 8 for requirements.