Model:
BAYECON103AA/AB
BAYECON104AA/AB
BAYRLAY006A
Down Discharge Economizer and Rain Hood
Used with:
4WCZ6, YCZ6024-036, & 4DCZ6036
4WCZ6, 4YCZ6, & 4DCZ6048-060
(Required with 4WCZ6 & 4DCZ6 models)
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.
18-HE85D1-1B-EN
Installer’s Guide
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
WARNING:
HAZARDOUS VOLTAGE - DISCONNECT POWER BEFORE SERVICING
Important:
After the Economizer installation you must
install an air filter rack ordered separately. Use:
BAYFLTR101B for 4WCZ6, 4YCZ6024-036, 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 specific minimum
fresh air cfm during each mode of operation, you must
order and install a BAYOSAC001 (outside air control)
accessory.
Inspect Contents
Y
ou must report damage and make claims to the trans
-
portation company immediately. Report missing parts to
your supplier immediately and replace with authorized
parts only.
Identify Economizer Kit Contents
Refer to Figures 1 & 2 on page 3 to identify the kit
contents.
ELECTRIC SHOCK HAZARD
Open and lock out all unit disconnects prior to ac-
cessory installation or unit maintenance, to prevent
injury or death from electrical shock or contact
with moving parts.
SAFETY HAZARD
Do not remove end covers from economizer actua-
tor; the spring-return assembly may release and
cause personal injury.
s
s
WARNING
s
s
WARNING
Install Economizer Kit
1.
Remove Power
D
isconnect 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
• D
ownflow 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
S
O 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 field connections as
shown in Figure 13 on page 9.
IMPORTANT —
This Document is
customer property
and is to remain with this unit. Please return to service
information pack upon completion of work.
