INSTALLATION INSTRUCTIONS FOR SG/SH/SA 24-60 UNITS

INSTALLATION INSTRUCTIONS FOR SG/SH/SA 24-60 UNITS
INSTALLATION INSTRUCTIONS
AECON818-1 MODULATING HORIZONTAL ECONOMIZER
FOR SG/SH/SA 24-60 UNITS
Economizers are used with SG/SH/SA 24-60 units for automatic sensor-controlled introduction of outdoor air into the
system through an electro-mechanically controlled damper.
CAUTION
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.
Step 1:
Check for correct number of parts. See list below.
1
1
8
-
Danger of sharp metallic edges. Can cause injury.
Take care when servicing unit to avoid accidental
contact with sharp edges.
ADAPTOR PANEL
(MATES TO RETURN OPENING)
Economizer Assembly w/ Filter
Wiring Diagram Sticker
#10 - 16 x ½ Hex Tec Screws
FRESH AIR INTAKE HOOD
Step 2:
Disconnect all power to unit.
RETURN DAMPER SECTION
LOGIC MODULE & HARNESS
CONTROL AND FILTER ACCESS PANEL
Figure 1
LOW VOLTAGE COMPARTMENT
(UPPER CORNER)
ECONOMIZER CABLE
RETURN/FRESH AIR ACCESS PANEL REMOVED
Figure 2
Step 3:
Economizer cable shown in Figure 2 is shipped with harness shown in Figure 1.
Step 4:
Remove the return/fresh air access panel. If cable is not already installed, route the cable through the unit as shown. See
Figure 2.
Step 5:
Connect harness of economizer to mating harness shown in Figure 2.
INSTALLATION INSTRUCTIONS
AECON818-1 MODULATING HORIZONTAL ECONOMIZER
FOR SG/SH/SA 24-60 UNITS
A/C UNIT
SUPPLY OPENING
RETURN AIR DAMPER
BE SURE EDGE OF ADAPTOR IS FLUSH WITH CORNER OF UNIT
MOUNTED OVER RETURN OPENING
ATTACH WITH SCREWS THROUGH FILTER ACCESS PANEL
FIELD SUPPLIED
Figure 3
Step 6:
Remove start-up air filter from Economizer. Secure Economizer to unit using (8) screws as shown in Figure 3. Replace
filter then filter access panel.
Step 7:
Replace control panel of economizer. Install return air duct cover ,removed in Step 4, over bottom duct opening in unit.
SUPPLY DUCT
RETURN DUCT
ECONOMIZER CONTROL PANEL
CUT OPENING 9" X 19"
(IF USING RELIEF HOOD)
Figure 4
Step 8:
Attach and seal weather tight return duct to Economizer. Duct size should be 12" x 24" I.D..
Step 9:
If the barometric relief is to be installed cut a 9" x 19" hole in the return air duct near Economizer as shown in Figure 4.
(Note: Barometric Relief (23H06) must be ordered separately.)
INSTALLATION INSTRUCTIONS
AECON818-1 MODULATING HORIZONTAL ECONOMIZER
FOR SG/SH/SA 24-60 UNITS
BAROMETRIC RELIEF
(23H06)
Figure 5
Step 10:
Secure pressure relief damper near Economizer over hole in return air duct using (4) screws. Refer to Figure 5.
Step 11:
Place the adhesive backed wiring diagram on the control access panel by the unit diagram. Reinstall control access
panel.
Step 12:
Make the connection of the Economizer plug to the unit Economizer plug. See the enclosed control specification data for
operation and check out.
Step 13:
Turn power back on to the unit.
SUPERSEDES 06-16-06
JULY 24, 2006
ARMIHE17
COMPONENT CODE
WIRE COLOR CODE
HARNESS DETAIL
E# = WIRE END DESIGNATION
E6 Wire Nut
E9 Socket Contact
E6 — YEL —
E6 — YEL —
E6 — BLU —
E6 — BLK —
E6 — GRN —
E6 — ORG —
Revision
A
84" — E9
84" — E9
84" — E9
84" — E9
84" — E9
84" — E9
Economizer
C7150B
C7400A
M7415A
PL1
PL2
TB-11
W7459A
Mixed Air Sensor
Fresh Air Sensor
Damper Actuator 24v
Economizer Plug
Field Harness Cap
Terminal Board
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
TAN
WHT
Black
Brown
Grey
Pink
Tan
White
BLU
GRN
ORG
RED
VIO
YEL
Change
Changed Wire Length
Date
07-10-06
Blue
Green
Orange
Red
Violet
Yellow
Modulating Horizontal Economizer
SG/SH/SA 24-60
Date: July 10, 2006
Supersedes: 05-19-06
Drawn by:
Unit # 05-324-17
Diagram# 0532417W
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