INSTALLATION INSTRUCTIONS AECON817-1 DOWNFLOW ECONOMIZER FOR SG/SH/SA 24-60 UNITS

INSTALLATION INSTRUCTIONS AECON817-1 DOWNFLOW ECONOMIZER FOR SG/SH/SA 24-60 UNITS
INSTALLATION INSTRUCTIONS
AECON817-1 DOWNFLOW ECONOMIZER
FOR SG/SH/SA 24-60 UNITS
AECON817-1 economizers are used with SG/SH/SA units
for automatic sensor-controlled introduction of outdoor air
into the system through an electro-mechanically controlled
damper.
INTERNAL DUCT COVER
ECONOMIZER ASSEMBLY
WARNING
Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, personal injury or loss of life. Installation
and service must be performed by a qualified
installer, service agency or gas supplier.
CAUTION
OUTDOOR AIR HOOD
Danger of sharp metallic edges. Can cause injury.
Take care when servicing unit to avoid accidental
contact with sharp edges.
Figure 1
Step 1:
Check for correct number of parts. See list below.
1
1
2
1
1
8
-
SG/SH/SA UNIT
Economizer Assembly
Economizer Adaptor Plate
Internal Divider
Outdoor Air Hood (Attached to Economizer)
Wiring Diagram Sticker
#10 - 16 x ½ Hex Tec Screw
Step 2:
Disconnect all power to unit.
Step 3:
Remove the filter access panel.
SUPPLY DUCT
RETURN DUCT
Step 4:
Install air filter kit if not already installed. Refer to filter kit
instructions.
Figure 2
Step 5:
This economizer requires an upper and lower return
opening. All three phase models and single phase 2 - 2.5
commercial units come with both openings. All other
single phase models come only with the lower return
opening. Cut the upper return opening if required. Refer to
Figure 2. Upper opening is the same size as the lower
opening with 2" between openings.
Step 6:
This economizer requires control wiring connections
within the unit. For models that are not already wired with
the economizer harness the economizer cable provided
on the economizer must be routed through the unit to the
control area. The unit top panel needs to be removed in
or der to in stall the economizer ca ble. Route the
economizer cable over the coil bracket and through the
separator panel wire chase to the control box. A bend tab
is provided on the coil mounting bracket. Refer to Figure 3
for wire routing.
FILTER ACCESS
PANEL REMOVED
CONTROL AREA
ECONOMIZER CABLE
Figure 3
INSTALLATION INSTRUCTIONS
AECON817-1 DOWNFLOW ECONOMIZER
FOR SG/SH/SA 24-60 UNITS
Step 7:
Install the internal divider through the filter access panel.
The internal divider goes between the two side return
openings and the bottom filter rail. The internal divider
must be fastened to the side return panel. There are two
different internal dividers provide for the small and large
cabinet unit. Refer to Figure 4.
FILTER KIT 92M54 / AFILT807-1
(ORDERED SEPARATE)
FILTER KIT WILL ACCOMMODATE A
1", 2" OR 4" FILTER (NOT INCLUDED).
Step 8:
For large cabinet units (30-60) install the adaptor plate
under the top panel edge. One of the top panel screws
needs to be removed for installation. Refer to Figure 6.
The small cabinet units (24-30) do not use the adaptor
plate.
Step 9:
Two of the top panel screws need to be removed on the
small cabinet (24-30) to install the economizer cabinet.
Attach the economizer cabinet to the side of the unit over
the two return openings.
Step 10:
Make plug connection from the economizer to the harness
plug. See the enclosed specification data for operation
and check out. For heat pump units change the relay wiring
as directed on the economizer wiring diagrams.
Step 11:
Install all access panels.
FILTER
INTERNAL DIVIDER
Figure 4
UNIT TOP
ADAPTOR PLATE
ECONOMIZER
Step 12:
Turn power back on to the unit.
INTERNAL DIVIDER
Figure 5
RETURN ACCESS
PANEL
SUPERSEDES 06-16-06
JULY 24, 2006
Figure 6
ARMIEC17
COMPONENT CODE
Revision
WIRE COLOR CODE
Change
Date
HARNESS DETAIL
E# = WIRE END DESIGNATION
E6 Wire Nut
E9 Socket Contact
E6 — YEL —
E6 — YEL —
E6 — BLU —
E6 — BLK —
E6 — GRN —
E6 — ORG —
84" — E9
84" — E9
84" — E9
84" — E9
84" — E9
84" — E9
Economizer
C7150B
C7400A
M7415A
PL1
PL2
W7459A
Mixed Air Sensor
Fresh Air Sensor
Damper Actuator 24v
Economizer Plug
Field Harness Cap
Logic Module
Notes:
1. Unit wiring shown as reference only. Check unit wiring for actual unit wiring.
2. Relays 1K and 2K actuate when the Outdoor Air Enthalpy is lower than the Return Air Enthalpy.
3. 1S is an electronic switch which closes when powered by a 24 VAC input.
4. Factory installed resistor should be removed only if C7400 Differential Enthalpy Sensor is added.
BLK
BRN
GRY
PNK
VIO
YEL
Black
Brown
Grey
Pink
Violet
Yellow
BLU
GRN
ORG
RED
WHT
Blue
Green
Orange
Red
White
Modulating Economizer w/ Relief
For SG/SH/SA 24-60 Units
Date: April 10, 2006
Supersedes:
Drawn by:
Unit # 05-424-17
Diagram# 0542417W
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