Trane BAYECON103AA, BAYECON103AB, BAYECON104AA, BAYRLAY006A, BAYECON104AB Installer's Manual
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.
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.
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.
18-HE85D1-4
WARNING
!
SAFETY HAZARD
Do not remove end covers from economizer actuator; the
spring-return assembly may release and cause personal
injury.
1
INSTALLER’S GUIDE
4. Install Economizer Assembly
NOTE: You must install the lter rack per the instructions
provided with the lter rack after you install the economizer.
CAUTION
!
Use care when inserting the economizer in the return
air compartment, to prevent damaging the foil faced
insulation.
1. The economizer ships with the return air damper folded
up to allow the assembly to t through the Coil opening
in the side of the unit. 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 completely
over the return air opening in the bottom of the unit. See
Figure 5 on page 4. Screw the economizer assembly together
with one assembly screw in the side of the economizer. Check
the linkage rod between the return air dampers to make sure it
is tight.
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
ange of the return air damper and into the mating hole
in the economizer assembly and tighten. See Figure 5 on page
4.
8. Complete Installation (4WCZ6, 4DCZ6, 4YCZ6)
1. In the Control Box, locate the ICMC Board in the upper left hand
corner of the Control Box. Find the YL/RD and YL wires in the 12
pin connector. Leaving enough length of these wires so that the
ends going to the ICMC Board can be stripped, cut these wires in
two. Strip the cut end of the wires going to the ICMC Board and
connect to economizer wires as per hookup diagrams on pages 8
and 9. Cap the ends of the Yellow and Yellow/Red wires not
being hooked up. Secure all wires with wire ties so that there is no
interference with any moving parts in the unit.
CAUTION
!
Be certain to cap the ends of the cut YL/RD and YL wires
that are not being connected to an accessory or the unit to
reduce the risk of a short.
2. In the Control Box, complete the wiring connections per the
appropriate wiring diagram on pages 8 and 9. Secure all wires so
that there is no interference with any moving parts in the unit.
3. Power the economizer and run the checkout procedure on page
10. Make desired adjustments to the controller setting the
minimum occupied damper position, the outside air setting (if
enthalpy control used).
4. Replace the unit Coil access panel, the Blower access panel, and
the Control/Heat access panel.
5. Install Rain Hood Assembly
1. Locate the rainhood assembly, which includes the relief damper
and the mist eliminator. The back of the hood side mating anges
need to be gasketed (gaskets included in kit). Loosen the right two
(2) screws on the unit’s top sealing ange above the economizer.
See Figure 7 on page 5.
2. Slide the top ange of the hood underneath the unit’s top sealing
ange. Drive two self tapping screws into the keyhole openings on
the side anges of the hood. Tighten the two (2) screws on the top
sealing ange and the screws on the hood side anges. See
Figures 7 and 9.
6. Mount Mixed Air Sensor
1. Mount the Mixed Air sensor (with wiring) to the left Blower
partition using two sheetmetal screws. See Figure 10, page 7. The
male tabs on the Yellow and Yellow/Black wires will connect to
the Economizer wiring harness in a later step.
2. Enthalpy SensorIf used, install this option at this time per
instructions provided in the sensor kit.
7. Route Main Wiring
1. From the Economizer assembly, pass the wire harness through the
coil grommet. See Figure 11 (view A) on page 7. Continue routing
the harness behind the Compressor compartment and into the
Blower compartment.
2. Continue routing the remaining harness through the grommet in
the Control Box partition and into the Control Box.
2
INSTALLER’S GUIDE
Mixed Air Sensor
Logic
Module
Return Air Damper
Flange Screw and
two (2) Mixed Air
Sensor
Sheetmetal Screws
(not shown)
Figure 1. BAYECON103AA/AB Economizer Kit Components
Economizer Assembly
Mist
Eliminator
(Filter)
Rainhood Assembly
4WCZ6, 4YCZ6, & 4DCZ6036
Logic
Module
Economizer Assembly
Return Air Damper
Flange Screw and
two (2) Mixed Air
Sensor
Sheetmetal Screws
(not shown)
Rainhood Assembly
Figure 2. BAYECON104AA/AB Economizer Kit Components
4WCZ6, 4YCZ6, & 4DCZ6048-060
4WCZ6, 4YCZ6, or 4DCZ6 Unit
Mixed Air Sensor
Mist
Eliminator
(Filter)
Top Sealing
Flange
Horizontal
Return Air
Panel
Down Flow
Return Air
Panel
Coils Access
Panel
Control Box
Access Panel
Blower Access Panel
Figure 3. Remove Panels
3
INSTALLER’S GUIDE
4WCZ6, 4YCZ6, or 4DCZ6 Unit
Insert economizer
in folded shipping
position
Economizer
actuator and
Logic Module
Economizer
Dry bulb outside air
temperature sensor
Figure 4. Insert Economizer in Shipping Position
1.) Swing
Down
Return Air
Damper
Return Air Damper
2.) Insert Assembly
Screw
Figure 5. Swing Down and Set Economizer Return Damper
4
Economizer outline
Install two (2)
screws into holes.
Leave extended
from unit 1/2”
INSTALLER’S GUIDE
Economizer and
Return Air Damper
Apply gasket between damper assembly and hood
Figure 6. Start Economizer’s Front Mounting Screws
Unit’s top sealing
ange
Economizer Rain
Hood
1. Loosen the two
(2) screws to allow
hood to slide under
top sealing ange of
the unit.
2. Drive six (6) self
tapping screws into
the keyhole openings
on each side of hood
anges.
3. Tighten the two
(2) top screws and
the two (2) side
screws
Figure 7. Mounting Rain Hood
Top ange of hood
slides under HVAC
unit’s top sealing
ange
Hood
HVAC unit’s top
sealing ange
HVAC unit
Detail
5
INSTALLER’S GUIDE
ICMC Board Relays
DFC
Economizer Unit Application Models A
BAYECON103AA/AB
BAYECON104AA/AB
4WCZ6036A
4DCZ6036A
4YCZ6036A
4WCZ6048-060A
4DCZ6048-060A
4YCZ6048-060A
Economizer Rain
Hood
Mist Eliminator
(lter)
Figure 8. Mount BAYRLAY006A
20 1/8”
24 3/8”
A
Outside air
dampers
Return air
dampers
Required lter kit,
order separately
Relief Damper
Return Duct
Roofcurb
Figure 9. Rain Hood, Economizer, and Filter
6
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