2
INSTALLER’S GUIDE
18-HE39D8-13A-EN
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT
- This Document is customer property and is to remain with this unit. Please return to service information pack
upon completion of work.
Install Economizer Kit
1. Remove Power
Disconnect and verify that power is off.
2. Remove Access Panels
Remove these four (4) access panels (see Figure 3, page 3):
• Control/Heat access panel
• Blower access panel
• Coil access panel
• Horizontal Return Air panel (discard or store)
3. Install Economizer Assembly
General
The economizer is a multi-damper design. It is installed in the
return air stream and is connected to the unit low voltage supply
through wire leads. The economizer is fully accessible through the
Coil access panel.
IMPORTANT:
The Economizer installation requires that you
install an air filter rack ordered separately. Use:
BAYFLTR101B for 2/4YC*, WC*, TC*, DC* *018-3036
BAYFLTR201B for 2/4YC*, WC*, TC*, DC* *042-3060.
When the economizer is installed in WC* models, relay accessory
kit BAYRLAY004A is required. Refer to the drawing on page 9 to
make your relay wiring connections in the Control Box.
Identify Economizer Kit Contents
Refer to Figures 1 and 2 on page 3 to identify the kit contents.
Inspect Contents
You must re port damage and make claims to the transportation
company immediately. Report missing parts to your supplier
immediately and replace with authorized parts only.
!
WARNING:
HAZARDOUS VOLTAGE - DISCONNECT POWER BEFORE SERVICING
1. The economizer ships with the return air damper folded
up to allow the assembly to fit through the Coil opening
in the side of the unit, see Figures 1 and 2 on page 3.
Insert the economizer assembly into the unit through the
Coil access panel opening. See Figure 4 on page 4.
2. Swing the return air damper section down so that it rests
on the bottom of the unit. The economizer will sit com-
pletely over the return air opening in the bottom of the
unit. See Figures 5 on page 5. Screw the economizer
assembly together with one assembly screw in the side
of the economizer. Tighten the linkage rod between the
return air dampers.
3. Insert 2 screws through the holes in the front face of the
unit and into the matching attachment holes in the
economizer assembly. See Figure 6 on page 5.
4.
Insert a screw through the pre-punched hole in the side
flange of the return air damper and into the mating hole
in the economizer assembly and tighten. See Figure 5
on page 5.
ELECTRIC SHOCK HAZARD
OPEN AND LOCK OUT ALL UNIT DISCONNECTS PRIOR TO
ACCESSORY INSTALLATION OR UNIT MAINTENANCE, TO PRE-
VENT INJURY OR DEATH FROM ELECTRICAL SHOCK OR CON-
TACT WITH MOVING PARTS.
WARNING
!
SAFETY HAZARD
DO NOT REMOVE END COVERS FROM ECONOMIZER ACTUATOR;
THE SPRING-RETURN ASSEMBLY MAY RELEASE AND CAUSE
PERSONAL INJURY.
!
WARNING
Use care when inserting the economizer in the return air compart-
ment, to prevent damaging the foil faced insulation.
CAUTION
!
