Trane ACONT900AC43UA User manual

Category
Split-system air conditioners
Type
User manual

This manual is also suitable for

Air Conditioning Procedures
Service Guide
Communicating Residential
Comfort Systems
First Edition
© 2010 Trane Inc.
All rights reserved. No part of this book
may be reproduced, in any form or by
any means, without permission in
writing from the publisher.
Produced and printed in the USA
A Comprehensive Reference for Service of Communicating
Residential Air Conditioning, Heat Pump & Gas Furnace Systems
1.0
Air Conditioning Procedures
We appreciate your feedback.....
We value your opinion. If you feel this service guide can be improved in some way, please
give us your thoughts. Simply email your opinion to [email protected]. You may also
write in the space below, tear out this page and mail it to:
Trane Company
Attn: Loran Dailey
6200 Troup Hwy.
Tyler, TX 75707
Comments
Name:
Address:
Email:
Phone#
Pub# 034-3457-01
Air Conditioning Procedures
We appreciate your feedback.....
Name:
Address:
Email:
Phone#
Pub# 034-3457-01
Comments
We value your opinion. If you feel this service guide can be improved in some way, please
give us your thoughts. Simply email your opinion to [email protected]. You may also
write in the space below, tear out this page and mail it to:
Trane Company
Attn: Loran Dailey
6200 Troup Hwy.
Tyler, TX 75707
Cautions & Warnings
A 1
SAFETY HAZARD
THIS INFORMATION IS INTENDED FOR USE BY
INDIVIDUALS POSSESSING ADEQUATE BACKGROUNDS
OF ELECTRICAL AND MECHANICAL EXPERIENCE. ANY
ATTEMPT TO REPAIR A CENTRAL AIR CONDITIONING
PRODUCT MAY RESULT IN PERSONAL INJURY AND OR
PROPERTY DAMAGE. THE MANUFACTURER OR SELLER
CANNOT BE RESPONSIBLE FOR THE INTERPRETATION
OF THIS INFORMATION, NOR CAN IT ASSUME ANY
LIABILITY IN CONNECTION WITH ITS USE.
WARNING
!
!
WARNING
!
WARNING
!
WARNING
!
WARNING
!
WARNING
FIRE OR EXPLOSION HAZARD
FAILURE TO FOLLOW THE SAFETY WARNINGS EXACTLY
COULD RESULT IN SERIOUS PERSONAL INJURY, PROPERTY
DAMAGE, OR DEATH. IMPROPER SERVICING COULD RESULT
IN DANGEROUS OPERATION, SERIOUS PERSONAL INJURY ,
PROPERTY DAMAGE, OR DEATH.
SERVICE PROCEDURES HAZARD
BODILY INJURY CAN RESULT FROM HIGH VOLTAGE
ELECTRICAL COMPONENTS, FAST MOVING FANS, AND
COMBUSTIBLE GAS. FOR PROTECTION FROM THESE
INHERENT HAZARDS DURING INSTALLATION AND
SERVICING, THE ELECTRICAL SUPPLY MUST BE
DISCONNECTED AND THE MAIN GAS VALVE MUST BE
TURNED OFF. IF OPERATING CHECKS MUST BE PERFORMED
WITH THE UNIT OPERATING, IT IS THE TECHNICIAN’S
RESPONSIBILITY TO RECOGNIZE THESE HAZARDS AND
PROCEED SAFELY.
Throughout this manual there are procedures where voltage may be
present and gas or refrigerant system checks may be required. Read all
cautions and warnings on this page before proceeding.
Voltage Hazard
Disconnect power to the unit before removing the
blower door. Allow a minimum of 10 seconds for IFC
power supply to discharge to 0 volts. Failure to follow
this warning could result in property damage, personal
injury or death.
CARBON MONOXIDE POISONING HAZARD
FAILURE TO FOLLOW THE SERVICE AND/ OR PERIODIC
MAINTENANCE INSTRUCTIONS FOR THE FURNACE AND
VENTING SYSTEM, COULD RESULT IN CARBON MONOXIDE
POISONING OR DEATH.
!
WARNING
FIRE OR EXPLOSION HAZARD
SHOULD OVERHEATING OCCUR, OR THE GAS SUPPLY FAIL
TO SHUT OFF, SHUT OFF THE GAS VALVE TO THE UNIT
BEFORE SHUTTING OFF THE ELECTRICAL SUPPLY. FAILURE
TO FOLLOW THIS WARNING COULD RESULT IN PROPERTY
DAMAGE, PERSONAL INJURY, OR DEATH.
!
CAUTION
Safety Hazard
Sharp Edge Hazard
Be careful of sharp edges on equipment or any cuts
made on sheet metal while installing or servicing.
Personal injury may result.
Where there is no complete return duct system, the
return connection must be run full size from the furnace
to a location outside the utility room, basement, attic,
or crawl space.
Do NOT install return air through the back of the furnace
cabinet.
Do NOT install return air through the side of the furnace cabinet
on horizontal applications.
NOTE: Minimum return air temperature is 55°F.
!
CAUTION
CONTAINS REFRIGERANT!
SYSTEM CONTAINS OIL AND REFRIGERANT UNDER HIGH
PRESSURE. RECOVER REFRIGERANT TO RELIEVE
PRESSURE BEFORE OPENING SYSTEM.
Failure to follow proper procedures can result in
personal illness or injury or severe equipment damage.
LABELING WIRES!
LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN
SERVICING CONTROLS. WIRING ERRORS CAN CAUSE
IMPROPER AND DANGEROUS OPERATION. VERIFY PROPER
OPERATION AFTER SERVICING.
!
CAUTION
!
CAUTION
BURN HAZARD
DO NOT TOUCH IGNITER. IT IS EXTREMELY HOT.
Cautions & Warnings
A 2
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(A/T)CONT900AC43UA Installer Guide
4 Heat/3 Cool/ Heat Pump
Communicating Programmable 3-Wire Hookup
Introduction........................................................................................................................................ 3
Product specifications ................................................................................................................... 3
Installation.......................................................................................................................................... 3
When installing this product .......................................................................................................... 3
Location......................................................................................................................................... 4
Selecting Comfort Control location ............................................................................................... 4
Sub-base installation ..................................................................................................................... 4
Wiring............................................................................................................................................ 5
Mounting Comfort Control on sub-base......................................................................................... 6
Initial power-up .................................................................................................................................. 6
Power-up sequence ....................................................................................................................... 6
Discovery mode ............................................................................................................................ 6
Communicating indoor unit - Communicating outdoor unit ........................................................... 7
Communicating indoor unit - Single stage cooling unit ................................................................. 7
Adjusting real time clock .................................................................................................................. 7
Setting calendar and time ............................................................................................................. 7
Installer setup (ISU) ........................................................................................................................... 8
Entering installer setup.................................................................................................................. 8
Operation: Using the Comfort Control .......................................................................................... 18
System and fan settings .............................................................................................................. 18
Fan settings................................................................................................................................. 18
LED indication ............................................................................................................................. 18
Filter indication............................................................................................................................ 18
Pre-programmed ......................................................................................................................... 18
Alert code numbers ..................................................................................................................... 18
Equipment damage hazard. Minimum compressor off-time is bypassed during installer
System test ..................................................................................................................................19
System checkout ............................................................................................................................. 19
Installer system test..................................................................................................................... 19
Advanced features........................................................................................................................... 19
Adjustable continuous air flow..................................................................................................... 19
Control response rate .................................................................................................................. 20
Cycle rate .................................................................................................................................... 20
Auto changeover ......................................................................................................................... 20
Communicating Controller
Section A
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Setpoint deadband ...................................................................................................................... 21
Backlit display ............................................................................................................................. 21
Filter reminders ........................................................................................................................... 21
Fan selections ............................................................................................................................. 21
Screen locked.............................................................................................................................. 21
Installer system tests ................................................................................................................... 21
Default factory settings................................................................................................................ 21
Wait indicator .............................................................................................................................. 22
Calibrate indoor temperature....................................................................................................... 22
Calibrate outdoor temperature .................................................................................................... 22
Outdoor temperature sensor ....................................................................................................... 22
Humidification.................................................................................................................................. 22
Indoor humidification control ....................................................................................................... 22
Frost control ................................................................................................................................ 22
Dehumidification ............................................................................................................................. 22
Integrated temperature and humidity control (ITHC)................................................................... 22
Droop ............................................................................................................................................23
Comfort-R™ delay .........................................................................................................................23
Dehumidification airflow .................................................................................................................23
Proprietary humidity control...........................................................................................................23
Special heat pump features ............................................................................................................ 23
Auxiliary heat lockout temperature..............................................................................................23
Compressor heat lockout temperature ........................................................................................ 23
Operation in heat mode............................................................................................................... 24
Defrost heater balance point control ........................................................................................... 24
Operation in emergency heat mode ............................................................................................ 24
Heat pump with fossil fuel heat (dual fuel) and outdoor temperature sensor .............................. 24
Troubleshooting guide ................................................................................................................... 25
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(A/T)CONT900AC43UA Installer Guide
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Table 1
Introduction
The (A/T)CONT900AC43UA is a communicating pro-
grammable Comfort Control (See Table 1) that sup-
ports single-stage or multi-stage heat/cool and heat
pump applications. It is a wall mounted, low voltage
(24VAC) communicating Comfort Control with backlit
LCD and a touch screen display. Room temperature
is maintained by controlling the operation of heating,
cooling, heat pump, and dual fuel systems via digital,
two-way communications. The Comfort Control will
communicate with and identify all ComfortLink™ II com-
ponents in the system. It is easily manually config-
ured via the user friendly Installer Setup menu. The
Comfort Control feature includes separate heating and
cooling setpoints, selectable auto or manual
changeover, menu driven 7-day programming, adjust-
able filter reminders, and outdoor temperature sens-
ing. Setup selections and diagnostics are stored in-
definitely in the Comfort Control’s nonvolatile memory,
eliminating the need for battery backup.
Product specifications
Power source: 18-30 VAC, Class II, 50/60 Hz
Storage range: -30°F to 150°F, 5% to 90% RH non-
condensing
Operating temperature range: 0°F to 120°F, 5% to
90% RH non-condensing
System mode: Heat, Cool, Auto, Emergency Heat,
and Off
Fan mode: On, Auto and Circ
Cooling setpoint temperature range: 60°F to 99°F,
1°F resolution
Heating setpoint temperature range: 50°F to 90°F,
1°F resolution
Indoor temperature display range: 40°F to 99°F,
Outdoor temperature display range: -40°F to 127°F
Indoor humidity display range: 0% to 99%, 1% reso-
lution
Minimum cycle off time delay: Compressor, 5 min-
utes. Heat, 0 minutes.
The comfort control contains a Lithium battery which
may contain Perchlorate material.
Due to State Law in California, the following statement
is required:
Perchlorate Material-special handling may apply. See
www.dtsc.ca.gov/hazardouswaste/perchlorate
Installation
When installing this product
Step 1
Read these instructions carefully. Failure to follow
these instructions may damage the product or cause
a hazardous condition.
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(A/T)CONT900AC43UA Installer Guide
Step 2
Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.
Step 3
Installer must be a trained, experienced service tech-
nician.
Step 4
After completing installation, use these instructions
to check out the product operation.
WARNING
Voltage Hazard. Can cause electrical shock or
equipment damage. Disconnect power before
beginning instructions.
Figure 1
Selecting Comfort Control location
Do not install the Comfort Control where it can be
affected by
Drafts or dead spots behind doors and in
corners.
Hot or cold air from ducts.
Radiant heat from sun or appliances.
Concealed pipes and chimneys.
Unheated (uncooled) areas such as an outside
wall behind the Comfort Control.
Sub-base installation
The Comfort Control can be mounted horizontally
on the wall or on a two inch by four inch wiring box.
Position sub-base horizontally on the wall or on a two
inch by four inch wiring box.
Step 1
Turn OFF all power to heating and cooling equip-
ment.
Step 2
If an existing Comfort Control is being replaced:
a.)Remove existing Comfort Control from the wall.
b.)Disconnect wires from existing control, one at
a time. Be careful not to allow wires to fall back
into wall.
c.) As each wire is disconnected, record wire color
and terminal marking.
d.)Discard or recycle old Comfort Control.
Step 3
Separate the Comfort Control from the sub-base to
expose mounting holes.
Step 4
Position and level the sub-base wallplate (for appear-
ance only.) The Comfort Control functions properly
even when not level.
Location
Install the Comfort Control about five feet (1.5m)
above the floor in an area with good circulation at
average temperature (See Figure 1.)
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Step 5
Use a pencil to mark the mounting holes.
Step 6
Remove the sub-base from the wall and drill two 3/
16” holes in the wall (if drywall) as marked.
For firmer material such as plaster, drill two 7/32” holes.
Gently tap anchors (provided) into the drilled holes until
flush with the wall.
Step 7
Position the sub-base over the holes, pulling the wires
through the wiring opening.
Step 8
Insert the mounting screws in the holes and tighten.
Wiring
All wiring must comply with local electrical codes and
ordinances. See Figures 2 and 3 wiring diagrams
for specific equipment applications. Refer to Table
2 for terminal designations.
Figure 2
Field wiring diagram, Communicating indoor unit - Communicating outdoor unit
Figure 3
Field wiring diagram, Communicating indoor unit - Single stage cooling unit
WARNING
Voltage Hazard. Can cause electrical shock or
equipment damage. Disconnect power before
beginning instructions.
Note:
The maximum cable length for the entire Comfort Control com-
municating system is 500 feet 18 AWG. The maximum dis-
tance of any single cable from a transformer is 250 feet 18
AWG.
Table 2
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Communicating Programmable 3-Wire Hookup
(A/T)CONT900AC43UA Installer Guide
Step 1
Loosen the terminal screws on the sub-base. Insert
wires into the terminal block next to the loosened
screw (See Figure 4.)
Figure 4
Step 2
Securely tighten each terminal screw.
Step 3
Push excess wire back in the hole.
Step 4
Plug the hole in the wall with nonflammable insulation
to help prevent drafts from adversely affecting Comfort
Control operation.
Mounting Comfort Control on sub-base
Step 1
Align the terminal screw block with the pins on the
back of the Comfort Control.
Step 2
Push the Comfort Control straight onto the wallplate
(See Figure 4.)
Step 3
Perform installation of all other system equipment.
Step 4
Turn ON power to the heating and cooling equip-
ment.
Initial power-up
Power-up sequence
The communicating Comfort Control will communicate
and identify all communicating components in the sys-
tem.
Discovery mode
Discovery mode begins when the communicating Com-
fort Control is first installed and power is connected.
For communicating equipment, the Comfort Control
automatically configures the equipment type, number
of stages, cycle rates for each stage and compressor
stage ratios based on the information it received dur-
ing Discovery mode.
While in Discovery mode, the LED indicator located
in the upper right corner of the Comfort Control will
be illuminated.
All discovered values will be saved into memory. If
a communicating device goes missing (Err 89) or
changes in value (Err 126) the error will be broad-
cast to the Comfort Control screen (restoring com-
munications will clear this error or see ISU 0706 to
reset the system configuration.)
The communicating Comfort Control can be reset
(ISU 0710) to factory default settings.
Note: ISU 0706 Will force a reinitialization without af-
fecting presets. ISU 0710 will reset everything includ-
ing custom programs and presets.
Important: Use 18-gauge color-coded Comfort Control cable for proper
wiring. Shielded cable is not typically required. Keep this wiring at least
one foot away from large inductive loads such as Electronic Air Cleaners,
motors, line starters, lighting ballasts, and large distribution panels. Failure
to follow there wiring practices may introduce electrical interference (noise)
which can cause erratic system operation. All unused Comfort Control wire
to be grounded at indoor unit chassis ground only. Shielded cable may be
required if the above wiring guidelines cannot be met. Ground the shield
only to the system chassis.
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4 Heat/3 Cool/ Heat Pump
Communicating Programmable 3-Wire Hookup
If no equipment is connected during the Auto-Discov-
ery process, the system mode will be stuck at “OFF”
and no equipment will run.
To change the default/discovery settings, enter the in-
staller Setup menu (See Table 4, Pages 9-17) and
select the desired item.
Only ISU settings with an “E” will be Auto-Discovered.
Manually changing an ISU setting to an option other
than “E” disables Discovery mode for that ISU setting.
See Table 3 for default cycle rate settings.
Table 3
Communicating indoor unit - Communicating
outdoor unit
For a fully communicating system, the communicat-
ing Comfort Control will automatically configure the
indoor and outdoor equipment configuration and cycle
rates for each stage (See Figure 2.)
Communicating indoor unit - Single stage
cooling unit
For a partially communicating system, the commu-
nicating Comfort Control will automatically config-
ure the indoor equipment configuration and cycle
rates for each stage (See Figure 3.)
The outdoor equipment configuration will default to
a single stage cooling unit.
Adjusting real time clock
Setting calendar and time
Locate and remove the tab labeled “Remove” in the
lower left corner of the Comfort Control back. The
tab must be removed to activate the real time clock.
(See Figure 5.)
Figure 5
If the system is not powered, the real time clock bat-
tery life is approximately 20 weeks.
The Comfort Control is designed to automatically
keep the current time and day in memory for up to
ten years under normal use once calendar is set.
When the Comfort Control is powered, the display is
ready for the calendar date to be entered (See Fig-
ure 6, next page)
Note: Clock accuracy is +/- 1 minute per month
C - A 8
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(A/T)CONT900AC43UA Installer Guide
Figure 6
Installer setup (ISU)
The Comfort Control works with many different sys-
tem types. The installer can use the Installer Setup
menu to change factory settings to customize instal-
lations (See Table 4.)
Entering installer setup
Follow these steps to enter the Installer Setup:
Step 1
Be sure the Comfort Control is powered. If neces-
sary, press the Done key to return to the home screen.
Step 2
Press and release the system key.
Step 3
Press and hold the two blank keys on either side of
the center key for approximately five seconds until
screen changes (See Figure 7.)
Step 4
Release the two blank keys when the screen on the
Comfort Control matches the screen in Figure 8 (See
Figure 8.)
Figure 7
Figure 8
Step 5
See Figure 8 to review how the Comfort Control keys
are used during Installer Setup (See Table 4, Pages
9-17) for the Installer Setup numbers and settings.
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Communicating Programmable 3-Wire Hookup
Note:
Manually changing an ISU setting to an option other than “E”
disables Discovery mode for that ISU setting. If power is lost,
all custom settings are retained in the memory.
Step 6
Press the Done key to exit the Installer Setup.
Table 4. Installer Setup Menu.
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(A/T)CONT900AC43UA Installer Guide
Table 4. Installer Setup Menu Continued.
No humidity option available if 3 is
selected
Note: If single stage is configured, ODU will run Low Stage,
but ID airflow ill be 100%. If 3-Three Stage is configured,
there will be an Err 89 on stat but unit will run.
For 3 stage furnace:
Option 1 = High stage heat only
Option 2 = Medium and high stage heat only
For modulating furnace:
Option 1 = High stage heat
Option 2= Modulating
Option 3 = 40% or 100% - No modulation
Note: If anything else is configured, other than
“E1”, then the blower will not run in cooling with
a furnace but continuous fan and heat will op-
erate blower okay/
Note: Auto discovered low stage airflow for 20
SEER:
2 Ton = 50%
3 Ton = 55%
4 Ton = 50%
5 Ton = 65%
C - A 11
(A/T)CONT900AC43UA Installer Guide
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Communicating Programmable 3-Wire Hookup
Table 4. Installer Setup Menu Continued.
Note: E1 = Auto discovered w/com ODU
E0 = Auto discovered w/o com ODU
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(A/T)CONT900AC43UA Installer Guide
Table 4. Installer Setup Menu Continued.
Note: Y2 counter only with Phase 2 product (serial date
code 0904) if heat demand is satisfied by Y2 - reset timer
HP with EH = 0 (no lockout)
Dual Fuel = 40 degrees default
(Range is 5 - 60)
Note: “0” is not an option with Dual Fuel (must
have a lockout temp configured)
Dual Fuel = 50 degrees default
Must have option 2 selected in
ISU0350.
(Range is 45-65 with 40 degree de-
fault is selected in ISU0350). (A 5 de-
gree deadband is enforced between
comp lockout and aux heat lockout)
Note: Watch for cool air complaints during de-
frost if aux heat lockout is configured. Also be
aware of ISU0361, 362 and 363.
Note: For phase 2 factory
setting = 0 - disabled.
(phase 2 = serial data code 0904)
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Trane ACONT900AC43UA User manual

Category
Split-system air conditioners
Type
User manual
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