Greenheck Fan Grease Grabber H2O Auto-Cleaning Hood GGH20 - Manual (Page 10)

10 Model GGH2O
®
Using the Uni-Strut - Option #2
1. The uni-strut (supplied by others) that holds the
hood up cantilevers over the end of the hood and
is mounted to the supply plenum hanger brackets.
ATTACHED AIR CURTAIN CANOPY STYLE HOOD ATTACHED AIR CURTAIN CANOPY STYLE HOOD
BACKSUPPLY BACKSHELF HOOD BACKSUPPLY CANOPY STYLE HOOD BACKSUPPLY CANOPY STYLE HOOD
VARIABLE SUPPLY PLENUM CANOPY STYLE HOOD
Air Curtain Supply Plenum
(ASP)
ATTACHED AIR CURTAIN CANOPY STYLE HOOD ATTACHED AIR CURTAIN CANOPY STYLE HOOD
BACKSUPPLY BACKSHELF HOOD BACKSUPPLY CANOPY STYLE HOOD BACKSUPPLY CANOPY STYLE HOOD
VARIABLE SUPPLY PLENUM CANOPY STYLE HOOD
Variable Supply Plenum
(HSP or VSP)
Using the Threaded Rod - Option #3
1. Insert 1/2 in. (12.7 mm) diameter threaded rod (by
others) into hanger brackets on the supply plenum
top. Raise and hang the external supply plenum
from adequate roof or ceiling supports.
2. The external supply plenum should be resting
lightly against the hood. The hood is used to
position the plenum only, it is not intended to
support the plenum. All hanger brackets must be
used and the plenum must be properly supported
while lifting to prevent damage or distortion. The
supply plenum must be hung level to operate
properly.
(Optional fastening of supply plenum to hood. See
directions).
3. It is recommended that caulk be applied at the
mating seams and surfaces of the plenum, the
hood, and the wall. If the supply plenum is next
to a wall, you will also need to caulk around the
surface next to the wall. Caulk the joints with
NSF Approved silicone caulk (GE SCS1000, or its
equivalent). The caulk is not provided.
Installing the Supply Duct Collar to the
Plenum
1. Place the duct collar(s) over the opening, fastening
with tack-welds at 1 to 2 in. (2.54 to 5.08 cm)
intervals, or sheet metal screws at 3 to 6 in.
(7.62 to 15.24 cm) intervals.
External Supply Plenum Weights, Dimensions and Supply Rates
External Supply
Plenum Type
Weight Width Height
Length per
section
Recommended
Supply Rate
(lbs/ft) (kg/ft) (in) (mm) (in) (mm) (ft) (m)
Back Supply 35.0 15.878 6 152.4 Variable Variable 3 to 16 .91 to
4.88
145 cfm/ft
(246.36 m 3 /hr)
Air Curtain Supply
• 14 inch
9.5 4.31 14 355.6 10 254 3 to 16 .91 to
4.88
110 cfm/ft
(186.89 m 3 /hr)
Air Curtain Supply
• 24 inch
12.5 5.67 24 609.6 10 254 3 to 16 .91 to
4.88
145 cfm/ft
(246.36 m
3
/hr)
Variable Supply 16.0 7.26 12 304.8 18 457.20 3 to 16 .91 to
4.88
curtain
0-80 cfm/ft
(0-135.92 m
3
/hr)
face
80-160 cfm/ft
(135.92 -271.84 m 3 /hr)
Horizontal Supply 14.0 6.35 12 304.8 18 457.20 3 to 16 .91 to
4.88
150 cfm/ft
(254.85 m
3
/hr)
Hood
UTILITY
CABINET
TOP VIEW
HOOD
TOP VIEW
SUPPLY PLENUM
SUPPLY PLENUM SHELL
END VIEW
HOOD FRONT
Option #2
Uni-Strut supplied by others Option #3
Threaded Rod
supplied by others
Threaded Rod
‘C’ Clamp Hood Standing Seam
Hanging Clip bolted to plenum shell
Hanging Clip
Option #2
The uni-strut (U channel) that holds the hood up,
cantilevers over the end of the hood and is
mounted to the Air Curtain Supply Plenum (ASP)
hanger brackets
Option #1
For plenums < than or = 96 inches
Two (2) clips are needed.
For plenums > than 96 inches
Three (3) clips are needed.
The third clip is located in the
center of the plenum length.
Option #1
Attach hanging clip to hood
standing seam with the
supplied ‘C’ clamps.
Optional: Drill and bolt a
1/4-20 SS bolt through the
clip and hood standing seam
Option #1
Hanging clip could be 23.5 inches from end if there is a utility cabinet on the
end of the hood.
Option #1 : Hanging Clip
Hanger Bracket
Note: Supply plenums are standardly supplied with hanging clips (Option #1).
If Option #1 is not applicable, use Options #2 or #3
Hanging methods for supply plenums
ASP: Air Curtain Supply Plenum
FSP: Face Supply Plenum
VSP: Variable Supply Plenum
Option #1: Hanging Clip
Option #2: Uni-Strut
Option #3: Threaded Rod
11.5
23.5
Hanger Bracket
Exhaust Plenum
Duct cut out area
Duct cut out area
Hood Length
Hood
Width
Exhaust Duct
Connection
Exhaust duct connection is to be
a continuous liquid-tight weld to hood.
Supply Duct
Connection
Supply duct connection to be
tack-welded with 1 to 2 inch
tacks or sheet metal screws
at 3 to 6 inch spacing to hood.
Front of Hood
Exhaust Plenum
8.0 8.0
8.0
3.0
3.0
14.0
8.0
1.0
12.0
NOTE: 1. Exhaust duct connection to be located within 48 inches from center of hood length to center of duct connection.
2. UL Listed hood assembly to be used only with Greenheck Fan Corp. labelled subassembly for exhaust hood without exhaust damper part no. DC
TOP VIEW
BACK VIEW
Top of Hood
Dimensions are shown in inches.