Greenheck Fan Ventilation Hood Outdoor Air Ventilator User Manual

Part # 457502  
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.  
GREENHECK  
P.O. BOX 410 SCHOFIELD, WISCONSIN 54476-0410  
PH. 715-359-6171  
 
June 1998  
®
Installation Instructions for:  
NV-45 w/Horizontal Discharge  
A -Equip. Support C  
L
441/4"  
Step 1 Mounting the Unit  
Equipment  
Support  
Footprint  
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.  
C
L
A
A
C
L
(fig.1)  
C
L
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.  
16  
48  
23  
Recommended Duct Size/Location  
and Intake Dimensions  
Minimum Straight Duct Length - 54”  
43  
16  
12  
(fig.2)  
(fig.3)  
Typical Installations  
DISCHARGE  
DISCHARGE  
INT  
AKE  
INT  
AKE  
(fig.4)  
(fig.5)  
Roof mounted arrangement HZ  
with weatherhood, mounted on three equipment supports.  
Ductwork is attached to discharge collar with rubber  
boot transition.  
Arrangement HZ shown as an indoor  
hanging installation with intake and  
discharge ductwork installed.  
(Hanging support structure for unit is by others).  
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Installation Instructions for:  
NV-45 w/Downblast Discharge  
Before beginning this installation:  
Step 1 Roof Opening  
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.  
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.  
For Installations using rectangular curb  
Roof  
Opening  
A
Rectangular  
Curb  
Footprint  
A/2  
A - Max Roof Open. Sq.  
Supply Duct C to  
47"  
L
B -  
881/2"  
Equip. Support C  
L
C*  
A
C*  
A/2  
C*  
C
L
B
C
L
*C- Determine equal dimension for these 3 locations  
C
L
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.  
Step 3 Install Ductwork  
Recommended Supply  
Ductwork Sizes  
The chart shows at left shows the duct  
sizes and straight lengths recommended  
Straight  
Duct  
Size  
Duct  
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.  
Length  
Supply  
Ductwork  
by Others  
16 x 16  
54"  
Duct Adaptor  
Ductwork  
Sealant  
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.  
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