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18-HE85D1-4
Installer’s Guide
Down Discharge Economizer and Rain Hood
Model: Used with:
BAYECON103AA/AB 4WCZ6, 4YCZ6, & 4DCZ6036
BAYECON104AA/AB 4WCZ6, 4YCZ6, & 4DCZ6048-060
BAYRLAY006A (Required with 4WCZ6 & 4DCZ6 models)
WARNING: HAZARDOUS VOLTAGE - DISCONNECT POWER BEFORE SERVICING
!
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
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: After the Economizer installation you must
install an air lter rack ordered separately. Use:
BAYFLTR101B for 4WCZ6, 4YCZ6, 4DCZ6036
BAYFLTR201B for 4WCZ6, 4YCZ6, 4DCZ6048-060.
When the economizer is installed in 4WCZ6 & 4DCZ6 models,
relay accessory kit BAYRLAY006A is required. Refer to Figure 13
on page 9 to make your relay wiring connections in the Control
Box.
IMPORTANT: In order to maintain a specic minimum fresh
air cfm during each mode of operation, you must order and
install a BAYOSAC001 (outside air control) accessory.
Identify Economizer Kit Contents
Refer to Figures 1 & 2 on page 3 to identify the kit contents.
Inspect Contents
You must report damage and make claims to the transportation company
immediately. Report missing parts to your supplier immediately and
replace with authorized parts only.
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
• Downow Return Air panel
3. BAYRLAY006A Installation (Required
for 4WCZ6 & 4DCZ6 units only, 4YCZ6
units skip to step 4)
1. Remove wire harness that came attached to the BAYECON
Logic Module being installed.
IMPORTANT: Do NOT remove the resistors from the
Logic Module. Also, Do NOT remove the YL & YL/BK
wires connected to SO and + on the Logic Module
2. Locate the ICMC Board in the upper left hand corner of the
unit control box and the DFC board in the upper center of
the unit control box. See Figure 8, page 6.
3. Using the existing holes in the back of the unit control box,
mount the relay bracket assembly using the 2 screws
supplied with the BAYRLAY0006A Kit. See Figure 8, page
6.
4. Route the BAYRLAY006A wire harness attached to the
relays to the logic module as shown in Figure 11 on page 7.
5. Connect the BAYRLAY006A to the economizer Logic
Module and make the eld connections as shown in Figure 13
on page 9.
WARNING
ELECTRICAL SHOCK HAZARD
Open and lock out all unit disconnects prior to accessory
installation or unit maintenance, to prevent injury or death
from electrical shock or contact with moving parts.
WARNING
SAFETY HAZARD
Do not remove end covers from economizer actuator; the
spring-return assembly may release and cause personal
injury.
!
!
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