265634-UAI-A-0906
YKIEC18
ACCESSORY KIT INSTALLATION INSTRUCTIONS
ECONOMIZER DAMPER AND HOOD
MODELS 2EE04702024 / 2EE04703824 / 2EE04703924
2MD04702524 / 2MD04702624 / 2MD04702824 / 1EH0411 / 1EH0412
FOR 15, 17.5, 20, AND 25 TON ROOFTOP UNITS
General
This instruction provides the necessary information to
properly field-install economizer dampers and hood
assembly on 15, 17 ½, 20 and 25 ton single package
rooftop units.
The damper accessory provides the return air and outdoor
air dampers and actuator for economizer operations.
Contained in this kit are all rain hood components.
Kit Includes:
F
D
A
Q
G
U
T
C
G
R
C
G
S
B
P
E
Figure 1: Economizer Kit
Qty
Item #
Description
Qty
Item #
Description
1
A
Economizer Hood Right Side Panel
1
P
Bottom Track
1
B
Economizer Hood Left Side Panel
1
Q
Top Flange
2
C
Fresh Air Divider
1
R
Return Air (RA) Damper
1
D
Fresh Air Hood Top
1
S
Return Air/Outdoor Air (RA/OA) Divider
2
E
Lower Filter Bracket
1
T
Outdoor Air (OA) Damper with Actuator
1
F
Adaptor Panel Fresh Air (20 and 25 Ton Units)
1
U
Damper Extension (20 and 25 Ton Units)
3
G
Economizer Filter
1
Bag of Screws
NOTE: To ease installation, read all instructions prior to assembling economizer kit.
Tools Required:
” Hex Socket Driver
l
Socket Drive Extension
” Hex Socket Driver
l
Hammer
l
Awl
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Tube of Silicone Rubber (Clear)
l
5
l
7
16
l
3
l
Drill for self-drilling screws (recommended cordless)
16
” Hex Socket Driver
8
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Damper Assembly Procedures
CAUTION
When installing dampers, use care to avoid damage
to filters or coils located in the adjacent
compartment.
1. Remove the four access panels (two OA, one RA, and
one filter shown in Figure 2) by using a 716" hex socket
to loosen he screws securing the rotating latches and
a 516" hex socket to remove the four screws on the
bottom of each panel.
Figure 4: Panel Latch
Note: Retain the "O" rings which provide the seal
between the panel and unit bottom.
WARNING
RETURN AIR ACCESS DOOR
If the return air duct cover has been removed, install
a covering over the open hole to prevent personal
injury or equipment damage.
2. Remove the support brackets on 20 and 25 ton
rooftop units.
FILTER ACCESS
DOOR
FRESH AIR ACCESS DOOR
Figure 2: Rooftop Unit
Figure 5: Removing Support Bracket
Figure 3: Installed Components
2
l
Use a 516" hex socket to remove the top screws
securing the support bracket located between the
return air and outdoor air compartments.
l
Use a 516" hex socket to remove the top screws
securing the corner support bracket.
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l
Use a 3 8" hex socket to remove the two inside top and
bottom screws. Save the screws and bracket for
installation later.
CAUTION
l
Position the bottom track so that clearance holes in the
bottom track can match the unit hole pattern. Use and
awl to align the holes.
4. Remove the RA Damper and the top flange from their
packing materials.
Lift the roof when removing the support bracket to
prevent tearing the roof seal.
Figure 8: Installing Top Flange
Figure 6: RA Duct and Screw Locations
l
Remove the RA duct panel covering the RA opening if
it has not already been removed by the installing
contractor.
5. Install the RA Damper:
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Inside the top lip, align the holes of the top flange with
the holes in the lip.
l
Use the self-drilling screws provided to secure the top
flange to the lip. Install the screws from outside the unit
as shown in Figure 8.
3. Install the bottom track:
l
Refer to Figure 6 and remove the 8 screws for 15
tons or 11 screws for 20 and 25 ton units, securing
the drip and bottom pans along the bottom inside of the
unit. Save the screws for installation later.
Figure 9: Connecting Linkage
Figure 7: Installing Bottom Track
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Remove the nuts attached to the swivel ball joints on
the linkage arm. Retain for future use.
l
Align the two swivel ball joints attached to the linkage
arm with the crank arms attached to the RA damper
blades.
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Insert the swivel ball joints into the top holes of the
crank arms and secure with nuts.
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YKIEC18
l
Use two 716" wrenches to tighten and secure the swivel
ball joints.
6. Install the OA Damper:
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Remove the outdoor air damper from the packing
material.
Figure 10: Installing Return Air Damper
l
With the identification label facing up in the lower left
corner of the damper, position the lower edge of the
damper on the bottom pan.
l
Slide the RA Damper on the edge of the bottom pan
until the bottom flange of the damper is past the bottom
track.
l
Lift the RA Damper up past the top flange and pull the
RA Damper towards you until the damper is positioned
in the bottom track.
l
Rest the RA Damper on the top flange.
Figure 13: Installing OA Damper
l
With the identification label facing up in the lower left
corner of the damper, set the bottom of the OA damper
into the bottom track from the filter access area.
l
Lift the top of the OA damper up past the top flange and
push the damper towards the RA damper along the
bottom track, and rest it on the top flange.
Figure 14: Initial Damper Frame Alignment
l
To aid the installation of the damper assembly, slide
the OA damper to the left until the frame overlaps the
RA damper frame as shown in Figure 14.
Figure 11: Positioning Return Air Damper
l
Slide the RA Damper to the left until the seal contacts
the heating compartment wall.
Figure 12: Securing Damper to Top Flange
l
4
Fasten the Damper to the top flange using pilot holes
and self-drilling screws provided. Refer to Figure 12.
No fastening to the bottom track is required.
Figure 15: Re-Installing Center Support Bracket
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7. On 20 and 25 ton units install the two support
brackets previously removed.
Note: At this time, the RA and OA damper frames will
not overlap.
l
CAUTION
Fasten the OA damper to the top flange using the
self-drilling screws and pilot holes provided. Use an
awl to align the holes.
Lift the roof when installing the support brackets to
prevent tearing the roof seal.
l
Align the bottom holes, lift the roof and rotate the
bracket to a vertical position.
l
Use the screws previously removed from each bracket
to secure.
8. Securing the OA Damper:
Figure 19: Connecting Linkage Rod
l
Remove and keep the nut attached to the swivel ball
joint on the linkage arm.
l
Align the swivel ball joint attached to the actuator
linkage arm with the crank arm attached to the damper
blade. This procedure will open the RA damper blades
while the OA damper blades will remain in the closed
position.
Figure 16: Foam Tape Installation Location
l
Using the 18" foam tape supplied, measure and cut a
length that will fit the long edge of the damper frame
that will rest against the access panel.
Note: FOR 25 TON Units, Attach Damper Extension
Arms (provided) to the Actuator Crank Arm and
Outdoor Damper Pivot Arm.
l
Insert the swivel ball joint into the bottom hole of the
crank arms and secure with nut.
l
Use two 716" wrenches to tighten and secure the swivel
ball joint.
Figure 17: Positioning OA Damper
Figure 20: Flange Screws
Figure 18: Damper Frame Alignment
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9. Use a 516" driver to remove the 2 screws located in the
floor flange between the return air and outdoor air
compartments and save for future use.
l
Use 4 self-drilling screws to secure the RA/OA divider
to the RA damper frame using the pilot holes provided.
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Fill the gap at the base of the divider with ¾” foam tape
provided.
l
On single enthalpy units, mount the enthalpy sensor to
the metal surface on the RA/OA divider. On dual
enthalpy units, mount the second enthalpy sensor on
the opposite surface in the return air. Use two
self-tapping screws to secure.
Figure 21: Applying Tape to Divider
10. Install the RA/OA divider:
l
Remove the return air/outdoor air divider from its
packing material.
l
Using the 18" foam tape supplied, apply a length that
will fit on the diagonal edge of the RA/OA divider.
Figure 23: Installing Cable Assemblies
11. Mounting Sensors and wire harness:
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Cut the wire tie securing the cable harness to the
damper.
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Insert the 15 pin connector to the unit economizer plug
near the filters.
Figure 22: Installing Divider
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Use the 2 screws removed in step 9 to secure the
RA/OA divider to the floor flange.
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Use two self-drilling screws to secure the OA/RA
divider to the support bracket.
6
Figure 24: Routing Cables
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YKIEC18
l
Uncoil the remaining wiring harness and route through
the round hole in the top flange. Allow the wires to hang
in the OA compartment.
l
Locate the discharge air sensor mounting location on
the heating section wall. Mount the sensor bracket
provided using one self-tapping sheet metal screw.
Figure 25: Component Location on RA/OA
TABLE 1: Sensor Connection Table
Sensor Type
(Terminal)
Figure 27: Grommet Installation Locations
15, 17.5, 20 and 25
Ton Units
(Wire Color)
Logic Module
(Terminal)
PURPLE
+o
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Insert the wire harness into split grommets and push
the grommets through each hole that the wires pass.
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Use tie wraps to bundle the wires and secure to the top
flange and RA/OA divider as shown in Figure 24 on
page 6.
Enthalpy
O.A. (+)
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O.A. (-)
RED
So
R.A. (+)
BLUE
+R
R.A. (-)
ORANGE
SR
Discharge Air
Temperature
2 Leads
T
T1
Make all wiring connections as shown in Table 1.
IMPORTANT
When using the wire harness, insert a loop between
the two tie wraps so that the wire harness does not
rub on the damper frames during operation.
Figure 28: Installing Blank-Off Section
Figure 26: Installing Discharge Air Sensor
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12. For 20 and 25 ton units only:
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Remove the blank-off section from the packaging.
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Using the 18” foam tape supplied, apply a length that
will fit on the long edge of the blank-off section which
contacts the access panel.
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Insert the blank-off section through the side access
opening of the OA compartment.
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Use the pilot holes on the top flange for the self drilling
screws provided to secure the top of the blank-off
section to the top flange.
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Install ¾” foam tape around the cut-out for the vertical
support bracket.
13. Damper Assembly is now complete. Proceed to the
hood assembly instructions.
Note - Place 18 x ½ gasket as shown in Figure 29 to both
side panels (A,B) before installing.
3. Install the economizer hood right side panel (A)
aligning the matching holes in flange with the holes on
the right side of fresh air access door. Insert and fasten
five screws supplied with the hood kit. Use a 516" drive
to tighten screws. See Figure 29.
4. Install the economizer hood left side panel (B) aligning
the matching holes in flange with the holes on the right
side of fresh air access door. Insert and fasten five
screws supplied with the hood kit. Use a 516" drive to
tighten screws. See Figure 29.
5. Remove the packing materials from parts. Align lower
filter bracket (E) holes against inside of hood right side
panel (A) and hood left side panel (B). Secure with
#10-½" x 16 screws provided. See Figure 29.
Economizer Hood Assembly Procedures
Note - To ease installation, read all instructions prior
to assembling economizer hood kit.
CAUTION
Care must be take when using cordless drivers that
the screws do not strip the metal take holes.
A
LOCATION OF GASKET
FRESH AIR ACCESS DOOR
LOCATION OF GASKET
B
C
C
A
Figure 30: Installing Divider Panels
Note - Place 18 x ½ gasket as shown in Figure 30 to both
hood sides over slots where fresh air dividers
(C) are inserted.
B
COVER PANEL REMOVED
E
Figure 29: Installing Economizer Hood Side Panels
1. Remove the cover panels by using a 516" hex drive to
remove the screws securing the cover panels. See
Figure 29.
2. Remove the economizer hood parts from the inside of
fresh air section of unit and remove the packing
materials from parts.
8
6. Remove the packing materials from parts. Insert upper
fresh air divider panel (C) between hood right side
panel (A) and hood left side panel (B). See Figure 30.
7. Align tabs of divider panel (C) and insert into slots in
hood right side panel (A) Repeat for hood left side
panel (B). See Figure 30.
Note - Do Not forget the gasket material that should
have been applied before Step 4.
8. Repeat Step 6 and 7 for installing upper fresh air
divider panel (C). See Figure 30.
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11. Take the fresh air access door with hood assembly
and place back in position and secure in place with
hardware removed in Step 1. See Figure 32.
LOCATION OF GASKET
D
A
C
D
F
B
G
C
B
BEND TABS DOWN
G
G
Figure 31: Installing Fresh Air Hood Top
Note - Place 18 x ½ gasket as shown in Figure 31 to
flange that are against the unit on fresh air hood
top (D) before installing.
9. Place fresh air hood top (D) over hood right side panel
(B) and secure with #10-½" x 16 screws provided. See
Figure 31.
10. Bend tabs down on divider panels (C) either by hand or
gently tapping with a rubber mallet. This must be done
to assure the hood structure. See Figure 31.
Figure 33: Installing Adaptor Panel & Filters
12. Install adaptor panel fresh air (F) under unit top panel
and over the flange of the fresh air hood top (D).
Secure with two #10-½" x 16 screws provided. See
Figure 33. (20 & 25 Ton Units)
13. Seal all seams and edges with silicone caulk (not
provided).
14. Install the economizer filters (G) inside the three
sections of the economizer hood assembly. See
Figure 33.
D
A
C
B
C
Figure 32: Installing Assembled Fresh Air Hood
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Supercedes: 035-19854-000-B-0105
Subject to change without notice. Printed in U.S.A.
Copyright © by Unitary Products Group 2005. All rights reserved.
Unitary
Products
Group
265634-UAI-A-0906
YKIEC18
5005
York
Drive
Norman
OK
73069