Trane BAYLOAM103 Assembly instructions

HAZARDOUS VOLTAGE - DISCONNECT POWER BEFORE SERVICING
WARNING:
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 infor-
mation pack upon completion of work.
Installer’s Guide
①
COOLING ONLY AIR CONDITIONER
HEAT PUMP
Low Ambient Control Kit
BAYLOAM103
HDPC-IN-18C
18-HE46D1-3B-EN
LOW AMBIENT KIT CONTENTS:
1 - Controller Module
1 - Liquid Line Temperature Sensor
1 - Outdoor Air Temperature Sensor
1 - B Y O Low Voltage Wiring Harness
1 - Sensor Clamp
1 - Thermal Grease
1 - Insulation Tape
1 - Information Label
3 - Screws, Wire Nuts, Wire Ties
1 - Installer’s Guide.
INSPECTION:
Check carefully for any shipping damage. This must be
reported to and claims made against the transportation
company immediately. Any missing parts should be re-
ported to your supplier at once and replaced with autho-
rized parts only.
INSTALLATION:
NOTE:
As the head pressure control is applied to units op-
erating in low ambient conditions, it is required that
the units have compressor crankcase heaters and
non-bleed txv’s.Refer to the Low Ambient Applica-
tion documentation.
ATTACH INFORMATION LABEL
Attach the Information Label to the control box cover. This
label,identiesfanmotorcyclingduringlowambientop-
eration.
MOUNTING CONTROL MODULE
1. Be certain power to unit is DISCONNECTED.
2. Remove cover panel on control box compartment.
3. Install control module into the control box.
a. If installing into an air conditioner only unit (non
heat pump), use the three (3) screws provided
and attach to the control box as illustrated in Fig-
ure 1.
b. If installing into a heat pump unit, remove the
three (3) screws holding the defrost board, place
low ambient kit assembly behind the defrost
board and reattach the defrost board and low am-
bient control with the three (3) screws provided in
the original defrost board mounting location. See
Figure 1.
MOUNTING CONTROL BOARD

2 18-HE46D1-3B-EN
Installer’s Guide
4. Remove the service access panel to the left side of
the control box of the air conditioner or heat pump.
5. Attach the liquid line sensor to the liquid line:
a. If installing on a cooling only air conditioner unit,
attach the liquid line sensor to the liquid line near
the drier assembly. Apply thermal grease (sup-
plied) to the liquid line, where the sensor will be
mounted. Using the clamp provided, attach the
sensor as shown; Figure 2A. When completed,
wrap the complete assembly with the insulation
tape.
b. If installing on a heat pump unit, attach the liquid
line sensor to the liquid line running vertically,
directly behind the control box. Apply thermal
grease (supplied) to the liquid line, where the
sensor will be mounted. Using the clamp provid-
ed, attach the sensor assembly as shown; Figure
③
②
A) COOLING ONLY AIR CONDITIONER
LIQUID LINE TEMPERATURE SENSOR
B) HEAT PUMP
CONTROL BOX SENSOR WIRING ROUTING
APPLY CLAMP TO SENSOR AND LIQUID LINE
2B. When completed, wrap the complete assem-
bly with the insulation tape provided.
6. Route the sensor leads through the low voltage
access hole and attach to the two (2) pin connector
provided on the control board. See Figure 3.
MOUNTING LIQUID LINE TEMPERATURE SENSOR

18-HE46D1-3B-EN 3
Installer’s Guide
MOUNTING OUTDOOR TEMPERATURE SENSOR
7. Using pliers, bend the corner of the control box
base downward, to create an opening for the sensor
leads. See Figure 4.
8. Route the sensor, from the control board, down
through the opening created in the control box base.
With wire tie provided, secure the sensor to the
low voltage wiring or conduit below the control box
base. Place the wire tie on the sensor wires (not on
the sensor) and dress so that the temperature sens-
ing area is not in direct contact with any surrounding
surfaces and is not in direct sunlight.
WIRING CONTROL MODULE
9A) Cooling Only Air Conditioner Models: See Figure
5 Disconnect the black fan motor lead from the
contactor (This wire is attached to contactor termi-
nal “T2”, with a quick connect terminal). Reconnect
this fan motor lead to the black wire from the solid
state relay on the control module. This wire has a
sleeved, 1/4" male tab for attaching to the fan motor
wire terminal.
Connect the other black wire from the solid state
relay to the contactor terminal “T2” (from where the
fan motor lead was disconnected).
Low voltage wires:
Connect the 3-pin wire assembly to J5 on the con-
trol board (3-pin male connector).
NOTE:
To ease the insertion of the connector housing
onto the J5 header, place the connector on the
tips of the three header pins. Angle the connec-
④
OUTDOOR TEMPERATURE SENSOR
SENSOR WIRE ROUTING
BEND CONTROL
BOX CORNER
AIR CONDITIONING / COOLING ONLY
⑤
tor upward toward the header latch while push-
ing connector over the header pins.
Connect the yellow lead wire to a 1/4" male tab on
the right hand side of the main contactor (low volt-
age contactor coil terminal).
Connect the blue lead wire to the wire nut junction
of the blue wire.
Connect the orange wire to the wire nut junction of
the yellow wire.
(New wire nuts are provided)

4 18-HE46D1-3B-EN
Installer’s Guide
200 / 230 VOLT HEAT PUMP
⑥
9B) 200/230 Volt Heat Pump: See Figure 6
Disconnect the black fan motor lead from the defrost
board relay (The black wire is attached to the “N.C.”
terminal of the relay).
CAUTION
!
FIRMLY HOLD RELAY WHEN REMOVING
WIRE.
Reconnect this fan motor lead to the black wire from
the solid state relay on the control module (This wire
has a sleeved, 1/4" male tab for attaching to the fan
motor lead wire terminal).
Connect the other black wire from the solid state re-
lay to the “N.C.” terminal on the defrost board relay
(from where the fan motor was disconnected).
Low voltage wires:
Connect the 3-pin wire assembly to J5 on the con-
trol board (3-pin male connector).
NOTE:
To ease the insertion of the connector housing
on to the J5 header, place the connector on the
tips of the three header pins. Angle the connec-
tor upward toward the header latch while push-
ing connector over the header pins.
Connect the yellow lead wire to a 1/4" male tab on
the right hand side of the main contactor (low volt-
age contactor coil terminal).
Connect the blue lead wire to the wire nut junction
of the blue wire.
Connect the orange lead wire to the wire nut junc-
tion of the orange wire.
(New wire nuts are provided.)

18-HE46D1-3B-EN 5
Installer’s Guide
9C) 460 Volt Heat Pump Models: See Figure 7
Disconnect the black fan motor lead from the fan
relay (terminal #6). Reconnect this black motor lead
to the black wire from the solid state relay on the
control module (This wire has a sleeved, 1/4" male
tab for attaching to the fan motor lead wire terminal).
Connect the other black wire from the solid state
relay to terminal #6 of the fan relay (from where the
fan motor wire was disconnected).
Low voltage wires:
Connect the 3-pin wire assembly to J5 on the con-
trol board (3-pin male connector).
NOTE:
To ease the insertion of the connector housing
onto the J5 header, place the connector on the
tips of the three header pins. Angle the connec-
tor upward toward the header latch while push-
ing connector over the header pins.
Connect the yellow lead wire to a 1/4" male tab on
the right hand side of the main contactor (low volt-
age
contactor coil terminal).
Connect the blue lead wire to the wire nut junction
of the blue wire.
Connect the orange lead wire to the wire nut junc-
tion of the orange wire.
(New wire nuts are provided.)
⑦460 VOLT HEAT PUMP

6 18-HE46D1-3B-EN
Installer’s Guide
SYSTEM SETUP
10. The control board contains a momentary test switch
(S1) and a 4-position installer selectable dip switch
(S2). Both components are located in the lower right
hand corner of the control board. See Figure 8.
TEST SWITCH
The test switch provides a means of verifying that
the fan motor is under the control of the Low Ambient
Controller. A “Y” signal must be present in order to test
the control. Depressing the test switch causes the fan
toalternatelycycleon(for3seconds)ando󰀨(for3
seconds)foratotaltimeof12seconds.Theon/o󰀨fan
operation may be observed by watching the fan once
the test function has been invoked or by monitoring the
head pressure using a gauge set. The LED on the solid
state relay should light when voltage is being applied to
the fan motor. Once the 12-second test period is com-
plete the control resumes normal control operation.
DIP SWITCHES
The controller will control to a liquid temperature set
point as determined by the dip switch settings. The dip
switch is used:
1. To select either Automatic Mode or Manual Mode
operation (S2 dip switch 4 setting).
2. To select the liquid temperature set point (S2 dip
switch 1, 2 and 3 settings).
Automatic Mode(S2dipswitch4in“O󰀨”position)
– The controller determines the approach tempera-
ture based upon the liquid and ambient tempera-
ture readings. The approach temperature = liquid
temperature – ambient temperature. The approach
temperature is calculated only when the ambient
temperature is in the range of 65 to 75 deg. F. and
the outdoor fan is on continuously. If the controller
has not yet acquired an approach temperature, S2
dip switch 1, 2 & 3 settings are used for determin-
ing the liquid temperature set point the same as in
Manual Mode. If the controller has acquired an ap-
proach temperature, then the liquid temperature set
point is determined as follows:
Liquid Temperature Set Point =
Approach Temperature + 70 deg. F.
Manual Mode (S2 dip switch 4 in “On” position) –
The S2 dip switch 1, 2, 3 settings are read by the
controller and used to determine the liquid tempera-
ture set point when
 1.Yisrstapplied
2. and after initial start-up mode completion, i.e.,
during the system control mode (no sooner than
six minutes after Y is applied). The liquid tem-
perature set point will not change during system
start-up.
The dip switches should be set prior to initial appli-
cation of the Y signal to the controller.
  Thedipswitchesshouldbesetforeachspecic
HVAC system based upon the following instructions:
Determine Liquid Temperature Set Point
Reference appropriate high side charging chart for
the unit; liquid pressure for cooling units and head
pressure for heat pump units.
Locate the high side pressure for 70 deg. F. out-
door temperature at the expected indoor wet bulb
temperature. Correct the high side pressure accord-
ingtothespecicindoorunitbeingused.ForHeat
pumps subtract 7 psi, for cooling only units subtract
zeropsi.Usingtherefrigerantpropertieschart,nd
the saturation temperature for the calculated liq-
uid pressure. Subtract the anticipated sub-cooling
temperature (typically 12 degrees) from the satura-
tion temperature to obtain an estimate of the liquid
temperature. Set S2 dip switch 1, 2 and 3 settings to
the nearest liquid temperature set point in the table
below.
S2 Dip Switch 4; O󰀨–AutomaticMode
(recommended setting)
On – Manual Mode
LIQUID TEMP
SET POINT°F
DIP
SWITCH 1
DIP
SWITCH 2
DIP
SWITCH 3
70 °F OFF OFF OFF
76 °F OFF OFF ON
82 °F OFF ON OFF
88 °F OFF ON ON
94 °F ON OFF OFF
100 °F ON OFF ON
106 °F ON ON OFF
112 °F ON ON ON

18-HE46D1-3B-EN 7
Installer’s Guide
LEDS
The control board contains two LEDs; one green and
one red surface mount. The green LED is a status indi-
catorlabeledLitePortonthecontrolboardandashes
at a 1/2 second on (plus fast blink at the end for LitePort
data)and1/2secondo󰀨rateinthecoolingmode.In
the heating mode the green LED is full on with a blink/
ickerOFF(LitePortdatatransmission)everysecond.
The red LED is a small surface mount component lo-
cated near the end of the large capacitor. The red LED
is labeled ALERT on the control board. The red LED
indicatorisnormallyo󰀨.IftheredLEDisonorashing
then a fault is indicated according to the following:
RedLEDFlashing1/10SecondON–1/10SecondO󰀨–
Liquid Sensor Fault
RedLEDFlashing1/2SecondON–1/2SecondO󰀨–
Ambient Sensor Fault
Red LED continuously ON – I2C EEPROM Fault board
failurewhichcannotbeeldrepaired
If the cause of a fault is cleared or repaired then the red
LED fault indication will clear with the removal and reap-
plication of 24 VAC power (Y) to the control.
The solid state relay on the control module also contains
a green LED indicator. This LED indicates when the sol-
id state relay is energized by the control. If the control is
cyclingthefanthenthisLEDwillbeon/o󰀨accordingly.
SYSTEM CHECK-OUT – COOLING UNITS ONLY
Verify that the control module is installed and wired per
the instructions contained within this installer’s guide.
(J5-Blue connected to “B”, J5-Yellow connected to “Y”,
J5-Orange connected to “Y”, Liquid sensor installed and
connected, ambient sensor installed and connected).
If uncertain about S2 dip switch 1, 2, 3, 4 settings, leave
in the factory preset position.
Apply power to the unit. Apply “Y” control signal.
VerifythegreenLEDisashingat1/2secondON1/2
second OFF rate.
Verify no red LED faults are present.
The fan should run continuously for a minimum of
10 seconds after “Y” is applied. After 10 seconds the
control may begin to cycle the fan if the ambient outdoor
temperature is 70 deg. or below. If the fan is cycling
and the outdoor temperature is below 70 deg., the
control is working. If after 10 seconds of “Y” application
the fan is on continuously, the TEST Switch (S1) may be
used to verify the Control Module has control over the
fan. Momentarily depress the TEST Switch (S1) on the
control board. The fan should then cycle 3 seconds on
then3secondso󰀨for12seconds.
NOTE:
If the green LED on the control board is full on with
a blink/icker OFF every second make certain the
orange wire from the control board is connected to
“Y” per these instructions.
⑧CONTROL BOARD
12 34
ON
OFF
S2
TEST
S1
J3 AMBIENT
J2
LIQUID
BYO
J5
ALERT
Lite
Port
RED
LED
GREEN
LED
S2-1,2,3,4
DIP SWITCHES
S1
TEST
SWITCH
AMBIENT
SENSOR
LIQUID
SENSOR
B,Y, O

Installer’s Guide
SYSTEM CHECK-OUT – HEAT PUMP
Verify that the kit is installed and wired per the instruc-
tions contained within this installer’s guide. (J5-Blue
connected to “B”, J5-Yellow connected to “Y”, J5-
Orange connected to “O”, Liquid sensor installed and
connected, Ambient sensor installed and connected).
If uncertain about dip switch settings (S2-1, 2, 3, 4),
leave in the factory preset position.
Apply power to the unit. Apply “Y” and “O” control sig-
nal.
VerifythegreenLEDisashingat1/2secondON1/2
second OFF rate.
Verify no red LED faults are present.
The fan should run continuously for a minimum of
10 seconds after “Y” and “O” have been applied. After
10 seconds the control may begin to cycle the fan if the
ambient outdoor temperature is 70 deg. or below. If the
fan is cycling and the outdoor temperature is below 70
deg., the control is working. If after 10 seconds of “Y”
application the fan is on continuously, the TEST Switch
(S1) may be used to verify the Control Module has con-
trol over the fan. Momentarily depress the TEST Switch
(S1) on the Control board. The fan should then cycle 3
secondsonthen3secondso󰀨for12seconds.
NOTE:
If the green LED is full on with a blink/icker OFF
every second make certain the orange wire from the
control board is connected to “O” per these instruc-
tions and the “O” signal is present.
The control board will leave the fan ON continuously
during heating mode, i.e., No “O” signal present. The
greenLEDisfullonwithablink/ickero󰀨everysecond
in the heating mode.
About Trane and American Standard Heating and Air Conditioning
Trane and American Standard create comfortable, energy efficient indoor environments for residential applications.
For more information, please visit www.trane.com or www.americanstandardair.com
The manufacturer has a policy of continuous data improvement and it reserves the right to change design and specifications with-
out notice. We are committed to using environmentally conscious print practices.
© 2020
18-HE46D1-3B-EN 08 Jul 2020
Supersedes 18-HE46D1-3 (July 2004)