Hallowell Acadia i Series User manual

Hallowell International 110 Hildreth Street, Bangor, ME 04401
t:(207) 990.5 00 --- f:(207) 990.5 02 --- [email protected] --- www.gotohallowell.com
Last Revised 02.24.10
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CONTENTS
1
Page Number(s)
QUICK START CHECKLIST 3-4
SAFETY CONSIDERATIONS AND INSTALLATION RECOMMENDATIONS 5-6
INSTALLATION STEPS 7-18
Step 1 Receiving Equipment and Checking Job Site 7
Step 2 Installation on a Solid, Level Mounting Pad or Foundation Rack 7
Step 3 Clearance Requirements 8
(Figure 1) –Clearance Requirements 8
Step 4 Install Indoor Air Handler and Expansion Device 9
Step 5 Making Piping Connections 10
Step 6 Making Electrical Connections 12
Configuring the Heat Pump Components 14
Step 7 Charging of the System 14
Table 1: Hallowell Acadia Line Set Charging Chart 15
Step 8 Start-up and Programming the Acadia outdoor unit Controller 16
Step 9 Checking the Refrigerant Charge 17
Step 10 Final Checks 18
OPERATION MODES 19-22
(Figure 2) –Diagnostics Exploded View 19
Cool Mode 19
Table 2: Cool Modes and Y2Out: Y1/Y2 & O vs. Ambient 19
Heat Mode 19
Table 3: Heat Modes and Y2Out: BINs vs. Y1/Y2 with Electric Back Up 20
Table 4: Heat Modes and Y2Out: BINs vs. Y1/Y2 with Dual Fuel Back Up 20
Table 5: Outdoor Ambient Temperature BINs 20
Table 6: Heat Modes vs. Outputs Energized 20
Defrost Mode 21
Emergency Heat Mode 22
CONTROLLER DETAILS 23-27
(Figure 3) –Controller Layout 25
Table 7: System Status and Fault Codes 26
Table 8: LED Status Indicators 27
(Figure 4) –Control Operation Flow Chart 27
FAULT CONDITIONS 28-30
FIELD TEST MODE 31-32
(Figure 2) –Diagnostics Exploded View 31
EXTRAS 33
Zone Controls 33
Hydronic Coil for Supplemental Heat 33
TROUBLE SHOOTING GUIDE 34-36
Table 9: Pressure Safeties 34
Table 10: Temperature Sensor Resistances vs. Temperature 35
APPENDIX A –SETTINGS 37-42
(Figure 5) –Factory Supplied Air Handler Control Board 37

CONTENTS
2
Page Number(s)
Factory Supplied Air Handler TXV Kit Installation Instructions 37
Table 11: Cooling and Heat Pump Airflow Taps for the Factory Supplied Air Handler 38
Table 12: Electric Heat Airflow Taps for the Factory Supplied Air Handler 38
Table 13: Delay Comfort Settings 38
(Figure 6) –Controller Layout 39
(Figure 4) –Control Operation Flow Chart 40
Table 14: Thermostat Settings 41
APPENDIX B –WIRING DIAGRAMS 43-48
(Figure 8) –Line Voltage Wiring 43
(Figure 9) –Hallowell Controller Wiring 44
(Figure 10) –Factory Supplied Air Handler Control Board Wiring 45
(Figure 11) –Hallowell Matched Thermostat Wiring 45
(Figure 12) –Entire Low Voltage Wiring With Electric Back Up 46
(Figure 13) –Entire Low Voltage Wiring with Dual Fuel Back Up 47
(Figure 14) –Compressor Starting Components 48
APPENDIX C –ACADIA CHARGING R-410A 49-52
Table 15: Hallowell Acadia Sub-Cooling Chart (FAHRENHEIT) 49
Table 16: Hallowell Acadia Sub-Cooling Chart (CELSIUS) 49
Table 1: Hallowell Acadia Line Set Charging Chart 50
Table 17: FAHRENHEIT Pressure/Temperature Chart R-410A 51
Table 18: CELSIUS Pressure/Temperature Chart R-410A 52
APPENDIX D –OUTDOOR UNIT MOUNTING 53-54
(Figure 15) –Typical Acadia Mounting 53
(Figure 16) –Northern Climate Snow Stands 54
APPENDIX E –ACADIA COMPONENTS 55
(Figure 17) –Acadia Components 55
APPENDIX F –EWC ZONE CONTROL 56
(Figure 18) –Acadia with EWC Zone Control Wiring 56
APPENDIX G –SPECIFICATIONS SHEET 57-60
SPECS A Electrical and Physical Data 57
SPECS B Heating and Cooling Performance Data 58
SPECS C Physical Dimensions 59
SPECS D Configurations of Hallowell Matched Air Handler 60
INSTALLER TO HOME OWNER CHECKLIST 61
INSTALLATION DATA SHEET 62

QUICK START CHECKLIST
3
Please Check or fill out as Completed
PIPING CONNECTIONS
Both the vapor and liquid lines should be fully insulated
separately with at leas
The liquid line filter drier should be installed as close to
the indoor air handler as possible and insulated.
If a vertical riser of 10-ft. or more is present on the line
set, the line set MUST be properly trapped at the base
of the riser. Consult Hallowell International Technical
Support for more information.
When making brazed connections, purge nitrogen
through the piping (e.g. 2 PSI standing pressure) to
maintain clean braze joints and eliminate oxidation
formation. The Acadia outdoor unit comes charged
with 50 PSI of dry nitrogen that can be used for purging
by turning the service valves counter
clock-wise slightly from fully front-seated.
FACTORY SUPPLIED AIR HANDLER
No Duct Bypasses are allowed on the Acadia systems.
Consult Hallowell International Technical Support for
more information.
Install the indoor air handler; ensuring proper duct
distribution, duct insulation, and duct sealing.
Duct isolators should be used on both the supply and
return to eliminate vibration transmission into the
home.
A proper air filter should be installed on the return side
of the indoor air handler.
A condensate drain should be installed properly and
trapped, terminating in a proper drain.
Run a minimum of 10-conductor, 18 AWG control
wiring from the indoor air handler to the thermostat,
and from the indoor air handler to the Acadia outdoor
unit.
Connect the control wiring, following color codes
provided in this manual, (Fig. 6 through 9, Appendix B).
Disconnect the low-voltage leads from the transformer
in the indoor air handler from the air handler control
board spade terminals labeled 24VAC and COM.
The line-voltage leads to the transformer MUST remain
connected to power the ECM blower motor.
Connect 24VAC and 24C provided from Acadia outdoor
24VAC and COM on the
indoor air handler control board (Fig. 4, Appendix A).
An appropriately sized electrical disconnect should be
installed if the electric heat kit is not used, per NEC
and/or local codes.
The electrical service to the indoor air handler should
be sized adequate for both the air handler and the
electric heat kit, if one is installed, per NEC and/or local
codes.
If an electric heat kit is installed, the HEAT/NO HEAT
jumper on the indoor air handler control board should
be set to HEAT. Leaving this jumper on NO HEAT
disables all auxiliary heat relays.
Set the airflow jumpers in the indoor air handler in
accordance with (Fig. 4, Appendix A).
The AC/HP jumper on the indoor air handler control
board should be set to HP (Heat Pump).
All supply and return registers should be open and
unblocked.
THERMOSTAT
Install the thermostat in a location where it will not be
directly exposed to conditioned air or drafts from doors
and/or windows.
Insulate between the base plate of the thermostat and
the wall to prevent drafts in the wall cavity from
affecting the thermostat.
A jumper between RC and RH SHOULD BE installed on
the thermostat.
A jumper between W2 and W/E SHOULD NOT BE
installed at the thermostat.
Configure the thermostat, installer configuration menu,
as indicated in this manual, (Table 13, Appendix A).
ACADIA OUTDOOR UNIT
Proper clearances should be maintained around the
Acadia outdoor unit in accordance with (Appendix D),
making sure to provide adequate space for access to
the compressor compartment access panel (30-in. (76-
cm.) minimum).
The Acadia outdoor unit should be leveled within ±3
degrees.
The Acadia outdoor unit should be placed on adequate
snow stands, NOT blocks, sleepers, etc., per climate
region with a minimum of 12-in. (30.5-cm.) clearance
to the ground.
The outdoor coil drainage holes should not be
obstructed from the unit to the ground, providing full
drainage runoff during the defrost cycles.
Check the factory tubing and make sure no tube is
rubbing against another or any sheet metal. Pay close
attention to the distributor tubes on both the indoor
and outdoor coils.
The transformer should be wired appropriately for the
applied line voltage. Factory wiring is for 240VAC. For
correct wiring, see (Fig. 9, Appendix B).
A minimum 10-conductor, 18 AWG control harness
should be correctly wired between the thermostat,
indoor air handler, and Acadia outdoor unit, following
the color codes and schematics provided in (Fig. 6
through 9, Appendix B).
An electrical disconnect should be properly installed
and sized for the Acadia outdoor unit, per NEC and/or
local codes.

QUICK START CHECKLIST
4
All electrical connections should be weather tight.
All cabinet and electrical fasteners should be secure.
Shipping vibration can loosen these connections.
Make sure the control wiring does not chaff and a
grommet is installed.
PRESSURE TESTING AND LEAK CHECKING
Pressure test the line set to 400 PSI for a minimum of
15 minutes.
A bubble solution should be used as necessary. All
braze joints and TXV connections should be checked.
EVACUATION AND CHARGING OF SYSTEM
Both the vapor and liquid service valves should be open
and back-seated.
The entire system should be properly evacuated to at
least 500 microns. A triple evacuation is the preferred
method for a clean installation.
An R-410A INITIAL CHARGE should be weighed in as a
liquid 
compressor compartment.
The FINAL CHARGE (if required) is to be weighed in
through the 1/4" charging port on the outside of the
Acadia outdoor unit while the system is operating.
The vapor service valve is high pressure
gas during heating operation and low pressure gas
during cooling operation.
(NOTE) The charging port ALWAYS reads the low pressure side
of the system. The 3/8” service valve port ALWAYS reads the
high pressure side of the system.
Charging operations should always be performed in the
heating mode. If the system must be charged in the
cooling mode, a return trip is required to check the
charge during heating season.
Total charge amount is dependent on the total linear
length of the liquid line, excluding any allowance for 90
degree elbows; see (Table 1, Appendix C).
SYSTEM STARTUP AND CHECKOUT
The access covers to the indoor air handler should be in
place to establish proper air flow across the indoor coil
while the system is operating.
After applying power, ensure the applied voltage is
within specifications. If the voltage is outside of
specifications, contact the local utility company.
Verify the Controller is active and no error conditions
are present.
Set the Controller program in the outdoor unit; P0 for
electric back up, P1 for dual fuel back up.
Obtain an accurate measurement of the outdoor air
temperature at the Acadia outdoor unit.
Measure the liquid line temperature by attaching and
insulating an accurate thermistor type or thermocouple
type as close to the Acadia
outdoor unit as possible.
Place the system into a 2nd Stage Heating Call (24VAC to
the Y2 terminal at the Acadia outdoor unit). A 5 minute
anti-short cycle timer will run out before any
compressor operation is permitted by the Controller.
Operate the system for a minimum of 30 minutes
before adjusting the charge.
Measure the liquid service valve pressure by attaching
an accurate R-410A rated gauge to the 3/8service
valve port.
Refer to (Table 14, Appendix C) for the required sub-
cooling temperatures in the heating mode.
For every 1 lb of additional refrigerant added, allow
sufficient time for the system to settle before taking
another sub-cooling reading.
Fill in the service sticker on the electrical box cover
during installation.
IMPORTANT: Upon completion, be sure to do the following:
Ensure that all wiring and tubing is secure in the Acadia
outdoor unit before installing panels and/or covers.
Securely fasten all panels and/or covers and ensure all
fasteners will remain tight.
Tighten all access fitting caps to 1/12-turn past finger
tight.
Leave the nual with the owner and explain
the system operation and periodic maintenance
requirements outlined in the manual.
heck List with the new Acadia
owner.
Fill out the Dealer Installation Check List and place in a
customer file.
Fill out the Installation Data Sheet on the last page and
e-mail, fax, or mail it to Hallowell International (e-mail
address, fax #, and mailing address are available on the
front cover).

SAFETY CONSIDERATIONS AND INSTALLATION RECOMMENDATIONS
5
(DANGER) This Identifies serious hazards which will result in severe personal injury and/or death.
(CAUTION) This Identifies unsafe practices which would result in minor personal injury and/or product and property damage.
(NOTE) This is used to highlight suggestions which will result in enhanced installation, reliability, or operation.
IMPORTANT: This is used to designate points of interest to be considered before, during, and after installation.
SAFETY CONSIDERATIONS
(CAUTION) Improper adjustment, alteration, installation, service, maintenance, and/or use can cause explosion, fire, electrical
shock, and/or other conditions which may cause death, personal injury, and/or property damage.
Consult a qualified installer, service agency, or your distributor for more information, or assistance. The qualified installer or
agency must use factory-authorized kits or accessories when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing, and work gloves.
Use a quenching cloth for brazing operations to protect system components, i.e. service valves, etc.
Have a fire extinguisher available.
Read these instructions thoroughly and follow all cautions or warnings included in the provided literature and attached to the
Acadia outdoor unit. Consult local building codes and National Electrical Code (NEC) and/or local codes for special
requirements.
INSTALLATION RECOMMENDATIONS
Position the Acadia outdoor unit AWAY from decks, patios, windows, etc. where the operational sounds may disturb the
customer. Ensure the Acadia outdoor unit is not placed under or near eaves, roof drains, or under roof pitches where ice, rain,
or snow may drop, where icicles may form, or any other debris may fall on top of and/or damage the unit.
Ensure the liquid and vapor tube diameters are appropriate for the capacity of the system and both the liquid line and the vapor
line are insulated separate. The Acadia system utili
liquid line at lower ambient temperatures, so the tubing must be insulated properly. Additional insulation may be required. A

Run the refrigerant tubes as directly as possible by avoiding unnecessary turns and bends, keeping the tubes the shortest length
possible to reduce the refrigerant charge amount and increase efficiency.
When passing refrigerant tubes through a wall, seal the opening with a sealing material such as RTV or other pliable silicon-
based caulk around the refrigerant lines where they penetrate to reduce vibration and to retain flexibility.
Install the filter drier inside at the indoor air handler and it should be insulated. This minimizes thermal losses on the liquid line
and increases system efficiency.
Install an oil trap on the bottom of the vapor line, and one for every 10-ft. (3.04-m.) of vertical rise. Consult Hallowell
International Technical Support for more information.

SAFETY CONSIDERATIONS AND INSTALLATION RECOMMENDATIONS
6
Avoid direct copper tubing contact with duct work, floors and floor joists, walls and wall studs, water pipes, or other
construction materials such as brick and concrete block.
Do not suspend the refrigerant tubing from joists and/or studs with rigid wire, strap, or other hangers which may come in direct
contact with the tubing.
When necessary, use hanger straps which are large enough to fit around the tubing insulation and isolate the hanger straps
from the insulation by using metal sleeves bent to conform to the shape of the insulation.
If the line set is routed on the exterior of the home, be sure to add additional insulation to both the liquid and vapor lines to
minimize thermal losses from the line set. ncies. A maximum of 5 to 10

(NOTE) Exterior line sets may have high thermal losses that can reduce the system capacity and efficiency.
Ensure that the tubing insulation is pliable, sealed with tape or glue, and completely surrounds the Vapor and Liquid lines
separately.
Maximum recommended line set length is 50-ft. (15.24-m.); consult Hallowell International Technical Support if other.
Maximum recommended vertical rise of 10-ft. or (3.04-m.); consult Hallowell International Technical Support if other.
Mount the Acadia outdoor unit on a solid, level, foundation pad with a proper sub-base and proper drainage to ensure the unit
will not shift during its lifetime.
If the Acadia system is replacing an existing R-22 based heat pump or air conditioner, all piping must be replaced at the time of
the new installation. Mineral oil used in R-22 systems is incompatible with the POE oil used in R-410A systems like the Acadia.
Consult Hallowell International Technical Support with any questions.
IMPORTANT: The maximum liquid- O.D. for all applications. The 3/8liquid line must be insulated independently
from the vapor line insulation.
(CAUTION) USE ONLY R-410A RATED SERVICE EQUIPMENT.
(NOTE) Only install the factory-supplied heat pump (bi-flow) liquid line filter drier on the liquid line at the indoor air handler
unit. Installation of the filter drier inside is to help prevent heat loss during heating operation. The filter drier must be insulated.
Obtain replacement bi-directional R-410A rated filter driers from your local supply distributor.

7
INSTALLATION STEPS
Step 1 —Receiving Equipment and Checking Job Site
(CAUTION) The Acadia outdoor unit is heavy. Take the necessary precautions and use appropriate equipment to move and
install.
UNPACK THE ACADIA OUTDOOR UNIT
Move to the final location. Remove the carton, taking care not to damage the Acadia outdoor unit or indoor air handler unit.
INSPECT EQUIPMENT
Check over both the Acadia outdoor unit and the indoor air handler unit for any signs of shipping damage. If the shipment is
damaged or incomplete, file a claim with the shipping company as soon as possible.
Check the Acadia outdoor unit for nitrogen pressure using a pressure gauge. The Acadia outdoor unit should have a charge of 50 PSI
(+/- 10%) of dry nitrogen. If the nitrogen charge is low or there is a lack of nitrogen pressure, DO NOT install the Acadia outdoor
unit; contact Hallowell International Technical Support. Consult the AHU manual for pressure for the indoor coil.
Step 2 —Install on a Solid, Level Mounting Pad or Foundation Rack
Mount the Acadia outdoor unit on a solid, level, foundation pad with a proper sub-base and proper drainage to ensure the unit will
not shift during its lifetime.
(NOTE) See (Fig. 10, Appendix D) for appropriate mounting configurations of the Acadia outdoor unit.
ELEVATE THE ACADIA OUTDOOR UNIT
(CAUTION) Do not block the drainage holes under the outdoor coil. Ice buildup will damage the coil. Concrete, wood, or any
other blocking SHOULD NOT BE USED to elevate the unit.
(NOTE) Accumulation of water and ice in the base pan may cause equipment damage. Elevate the unit per local climate and
code requirements to provide clearance above the estimated snowfall levels and ensure adequate drainage of the unit. Use only
Hallowell Approved snow stands in areas where prolonged freezing temperatures are encountered. Ensure that the outdoor coil
drainage holes are not obstructed by the snow stand. Ensure the mounting pad will not shift or swell from seasonal frost heaves.
The Acadia outdoor unit must be mounted on Hallowell Approved snow stands to allow water to drain during a defrost cycle
and so ice build-up will not interfere with the unit operation. The snow legs should be mounted on the support rails of the
system and not on the base pan; this allows the water to drain out of the unit during defrost and will not cause flex and
distortion to the cabinet. The base pan is not designed to support the weight of the system.
The Acadia outdoor unit must be placed on a secure and level mounting pad or rack to prevent movement due to frost or ice
build-up and to allow for proper drainage of the unit, and placed above the average snowfall line in the area of installation.
Due to icing on the outdoor coil, the Acadia outdoor unit must be mounted so that run off of water during defrost will not cause
a safety issue when the water refreezes. Example: Do not set the Acadia outdoor unit so that defrost condensate will run across
a walkway.
The Acadia outdoor unit SHOULD NOT be placed under or near eaves, roof drains, or under roof pitches where ice, rain, or snow
may drop, where icicles may form, or where any other debris may fall on top of and/or damage unit.

INSTALLATION STEPS
8
(NOTE) On rooftop applications, mount on a level platform or frame. Place the Acadia outdoor unit above a load-bearing wall
and isolate the unit and line set from the structure. Arrange supporting members to adequately support the system and minimize
transmission of vibration to the building. Consult local codes governing rooftop applications.
(CAUTION) Do not allow POE oil lubricant to come into contact with roofing material(s). POE oil lubricant may deteriorate
certain types of synthetic roofing.
(NOTE) The Acadia outdoor unit must be level to within ±3 degrees.
Step 3 —Clearance Requirements
When installing this system, allow sufficient space for airflow, clearance, refrigerant piping, wiring, and service.
Allow at least 30-in. (76-cm.), 24-in. minimum, of clearance at the service end of the Acadia outdoor unit, and 48-in. (122-cm.)
minimum above the unit for proper airflow. Recommended clearance on the remaining sides is 18-in. (46-cm.), 12-in. (30.5-cm.)
minimum. The Acadia outdoor unit is not to be installed in any type of enclosed structure.
Maintain a distance of 36-in. (91-cm.) between units in multi-unit applications.
Position the unit(s) so that ice, snow, or water from roof or eaves cannot fall directly or indirectly on the Acadia outdoor unit.
Cover piping to ensure that ice and snow will not damage the refrigerant lines and insulation.
(NOTE) On rooftop applications, locate the Acadia outdoor unit at least 12-in. (30.5-cm.) above the roof surface.
Figure 1 - Clearance Requirements

INSTALLATION STEPS
9
Step 4 —Install Indoor Air Handler and Expansion Device
For proper system operation, reliability, and performance the indoor air handler must be installed with a balance port, bi-directional
heat pump TXV specifically designed to operate with R-410A refrigerant at the given system capacity. Do not install an air handler
with evaporator coils having a capillary tube or an orifice type metering device.
INDOOR AIR HANDLER INSTALLATION
(NOTE) In the event the indoor air handler is installed prior to the rest of the system, it is recommended that all air handler
settings and wiring be double checked at this point.
There is only one Hallowell Approved air handler. Any other air handler installed has no guarantee on the efficiency, life expectancy,
and/or performance. Indoor air handlers used with an Acadia outdoor unit must be capable of operating with a minimum of 2
blower speeds. On variable speed air handlers, ensure the jumpers are placed for recommended air flow requirements. All indoor
air handling units must be installed as specified by the manufacturer’s installation instructions. However, the following
recommendations should be considered to minimize noise and service issues:
Take the proper precautions when mounting the indoor air handler for noise and vibration dampening. Use duct isolators on
both the supply and return ducts connecting to the indoor air handler.
DO NOT run the system and/or the indoor air handler fan while construction is in progress.
All ductwork must be properly sized for proper airflow, 400 CFM per ton at a 0.10 to 0.15 static pressure. Undersized ducts will
reduce the system performance, resulting in a reduced life, higher operational costs, and/or unit damage. Any questions with
the duct work, consult Hallowell International Technical Support.
Ensure that all air registers are in the fully open position.
Utilize flex connections at the main ductwork supply and return to isolate potential vibrations and noise. Ensure ductwork does
not come in contact with structural building members.
Be sure the filter cover is installed on the indoor air handler, ensuring easy access to the filter for routine maintenance and/or
filter changes. Any gaps, holes and joints should be properly sealed to prevent air leakage.
Seal all joints and insulate all ductwork.
Be sure the condensate drain and/or line set do not block access to the filter door or any other access panels of the indoor air
handler.
(CAUTION) A Duct Bypass must NOT be used due to the high output capacity of the Acadia during certain outdoor ambient
conditions. Consult Hallowell International Technical Support for additional support.
IMPORTANT: An air filter must be installed upstream of the return side of the indoor air handler coil, such that the filter is easy to
access for routine filter changes.
(NOTE) Improper installation of equipment may result in undesirable noise levels in the living area.
The Hallowell matched air handler(s) come from the factory with bi-flow TXVs, not installed, specifically designed for R-410A.
Installation of a TXV is required.
IMPORTANT: When installing the Acadia outdoor unit with the indoor air handler, an R-410A rated TXV must be installed. NO
OTHER TYPE OF METERING DEVICE MAY BE USED! Contact Hallowell International Technical Support for any questions about
sizing or applications.

INSTALLATION STEPS
10
IMPORTANT:The TXV should be mounted as close to the indoor air handler coil as possible with the thermal bulb securely
mounted and insulated.
(NOTE) When using the Hallowell matched air handler and/or TXV kit, see (Appendix A –Factory Supplied Air Handler TXV Kit
Installation Instructions).
IMPORTANT: If replacing an existing hot air furnace, make sure the ductwork is sized appropriately for the airflow needed by the
Acadia. Insulating and sealing the ductwork will increase the efficiencies and performance of the Acadia.
Step 5—Making Piping Connections
(DANGER) Recover all refrigerant and/or relieve any pressure before system repairs or final unit disposal to avoid personal
injury or death.
(CAUTION) An oil trap must be installed at the bottom of any vapor line riser. If the riser is over 10-ft. (3.04-m.), contact
Hallowell International Technical Support.
(NOTE) The Acadia outdoor unit must be connected to a factory-approved indoor air handler.
(NOTE) The Acadia outdoor unit is charged with 50 PSI of dry nitrogen. If less nitrogen is present in the outdoor unit, contact
Hallowell International Technical Support before going further. Additional steps may be required if the system has lost the
factory nitrogen charge.
The whole system, when installed, must be evacuated to 500 microns to eliminate contamination and moisture in the system.
The Acadia outdoor unit(s) is/are carefully evaluated and listed with specific indoor coils and fans for proper system efficiency,
performance, and reliability.
REFRIGERANT TUBING & FILTER DRIER
IMPORTANT: If the Acadia system is replacing an existing R-22 based heat pump or air conditioner, all piping must be replaced at
the time of the new installation. Mineral oil used in R-22 systems is incompatible with the POE oil used in R-410A systems like the
Acadia. Consult Hallowell International Technical Support with any questions.
(CAUTION) The filter drier must be a Bi-Flow, Heat pump, and R-410A type filter drier.
(NOTE) The filter drier must be installed as close to the indoor air handler and insulated to prevent heat loss. The Acadia
recovers waste heat from the liquid line in the heating mode. Insulate the filter drier with 1/2" thick insulation after installation
to help retain heat.
(NOTE) DO NOT install a liquid line sight glass.
PRECAUTIONS DURING LINE SET INSTALLATION
(CAUTION) Be sure nitrogen is flowing through the system prior to any brazing for the prevention of carbonization and
contamination of the system.
(CAUTION) The Acadia system uses POE oil for the compressor lubricant. Preventative measures should be taken to minimize
and eliminate the possibility of atmospheric pressure entering the system. Use a nitrogen purge to prevent ambient air from
entering the system during piping connections. Take the proper precautions during piping installation.
(NOTE) Both the vapor line and the liquid line must be insulated separately.

INSTALLATION STEPS
11
IMPORTANT: Keep the refrigerant lines free of debris and moisture.
Ensure all line set tubing meets R-410A refrigerant requirements.
Install the line set with as few bends as possible, reducing the number of 90° bends where possible. Care must be taken not to
damage or kink the tubing. Use ACR, hard drawn copper tubing where no appreciable amount of bending around obstructions
is necessary. If soft copper must be used, care must be taken to avoid sharp bends which may cause a restriction.
The line set should be installed so it will not obstruct service access to the Acadia outdoor unit, indoor air handler panels, or air
filter.
Care must be taken to isolate the refrigerant lines for noise transmission and vibration from the equipment to the structure.
The vapor line must be insulated with a minimum of 1/2" wall foam rubber insulation. The liquid line must also be insulated
with a minimum of 1/2" wall foam rubber insulation separately from the vapor line.
Use PVC or other suitable piping as a conduit for all underground installations.
When passing refrigerant tubes through a wall, seal the opening with a sealing material such as RTV or other pliable silicon-
based caulk around the refrigerant lines where they penetrate to reduce vibration and to retain flexibility.
Use only long radius 90° for any hard drawn copper.
BRAZING CONNECTIONS
(CAUTION) Purge the line set with nitrogen before and while brazing to prevent internal carbonization, to prevent contaminates
from entering the system, and to protect the POE oil. Use industry standard brazing practices. The use of a brazing shield may be
required to keep from burning the side panel of the indoor and/or outdoor unit(s).
1. Run the line set from the Acadia outdoor unit to the indoor air handler. Be sure to keep the ends of the tubes sealed so no
foreign debris or moisture can get into the tubing.
2. Remove the
Schrader valve core from the vapor service valve. Set the nitrogen purge to no more than 2 PSI standing pressure.
3. Brazing one joint at a time, work your way around the line set, starting with the vapor line connection at the Acadia outdoor
unit. Be sure to wrap the service valves with a heat sink such as wet cloths. This protects the service valves from overheating.
4. At the indoor air handler, braze the vapor line to the vapor connection on the air handler.
5. indoor air handler, insert a short piece of 3/8tube and braze the joint.
6. Install the liquid line filter drier air handler and braze in place.
7. Insset into the other end of the filter drier and braze in place.
8. Remove the Schrader valat the Acadia outdoor unit.
9. Wrap the service valve with a heat sink such as wet cloths, preventing the service valve from overheating. Insert the pipe and
braze into place. The use of a brazing shield may need to be used to keep from burning the side panel.
10. Re-install the Schrader valve cores into the vapor and liquid service valves.
11. Leak test the line set by adding 400 PSI of nitrogen to the line set and indoor air handler coil.

INSTALLATION STEPS
12
IMPORTANT: Open all service ports and all flow-control devices once the system is piped. Do not leave the system open to the
atmosphere. The POE oil in the compressors is extremely susceptible to moisture absorption. Always keep the ends of the tubing
sealed during the installation and free of debris.
LEAK TESTING
Pressurize the system with 400 PSI of nitrogen. Leak test all the joints on the Acadia outdoor unit, the indoor air handler unit, and
the refrigerant tubing. Open both service valves by turning the center stem fully counter clock-wise until the stem reaches the top
of the valve (back-seating the valve).
(NOTE) Ensure both service valves are open and back-seated and the nitrogen purge is removed before evacuation.
(NOTE) The Acadia outdoor unit is charged with 50 PSI of dry nitrogen that must be released before evacuation.
EVACUATE THE ACADIA OUTDOOR UNIT, THE INDOOR AIR HANDLER UNIT, AND THE REFRIGERANT TUBING
Evacuation requires a vacuum pump capable of achieving a minimum vacuum below 500 microns and a micron gauge for accurate
indication of vacuum levels. Setup the vacuum pump and evacuate to at least 500 microns.
(NOTE) Be sure to use a manifold set, a micron gauge, and a vacuum pump that are in good working condition and leak free.
The vacuum method is the most effective way of assuring a system is free of air, leaks, and moisture. The refrigerant system must
be evacuated down to a minimum of 500 microns. Once 500 microns has been reached, the system should be sealed off and held at
500 microns for a minimum of 15 minutes to perform a free air test.
IMPORTANT:Break any system under a vacuum with nitrogen pressure for repairs or refrigerant for charging, preventing ambient
air from entering the system.
FINAL TUBING CHECK
IMPORTANT:Ensure both the Acadia outdoor unit and indoor air handler unit insides have not shifted during shipment. Ensure
the tubes are not rubbing against each other or on any sheet metal. Pay close attention to the distributor tubes and service port
connections. Check the insulation on the vapor and liquid lines; making sure it is sealed properly with tape or glue.
Step 6 –Making Electrical Connections
(DANGER) To avoid personal injury or death, do not supply power to the Acadia outdoor unit with the compressor terminal box
cover removed.
(CAUTION) Be sure the field wiring complies with local and national fire, safety, and electrical codes, and the voltage to the
system is within limits shown on the unit rating plate. Contact the local power company for correction of improper voltages. See
the unit rating plate for the recommended circuit protection device.
(NOTE) See the unit rating plate. Do not install a unit in an area where voltage may fluctuate outside of the normal voltage
fluctuations of 198VAC –253VAC, in accordance with the specification sheet in (Appendix G). Operation of the Acadia outdoor
unit with improper line voltage constitutes abuse and could affect the unit reliability.
(NOTE) Install a branch circuit disconnect of adequate size, per the NEC, to handle the system starting current. Locate a circuit
disconnect within sight from and readily accessible from unit(s), per Section 440 of NEC.
(NOTE) Use copper conductors only, between the disconnect switch and the Acadia outdoor unit and the indoor air handler unit.

INSTALLATION STEPS
13
(NOTE) Use a minimum 10 conductor, 18 AWG wire harness for control connections between the thermostat, indoor air handler
unit, and the Acadia outdoor unit. A minimum 10 conductor, 18 AWG wire harness must be used to prevent incorrect wiring of
the system.
IMPORTANT:Match the wiring color codes according to the system drawings for easy trouble shooting and standardization. For a
color code reference, see (Fig. 6 through 9, Appendix B).
ROUTE GROUNDED AND POWER WIRES
(DANGER) The Acadia outdoor unit cabinet must have an uninterrupted or unbroken ground connection to minimize personal
injury if an electrical fault should occur. The grounded connection may consist of electrical wire or metal conduit when installed
in accordance with existing electrical codes. Failure to follow this warning can result in an electric shock, fire, and/or death.
(CAUTION) Line and Control voltage wires must be routed clear of any system components to prevent wiring chafing and/or
electrical shorts. Ensure Line and Control voltage wires are routed away from terminal connections of relays and capacitors.
Remove the access panel and electrical box cover to gain access to the unit wiring. Extend wires from the circuit disconnect through
the power wiring hole provided, into the unit control box. Size wires per the NEC.
CONNECT GROUNDED AND POWER WIRES
(CAUTION) Test the grounded connection using a multi-meter set for ohms from the ground lug of the Acadia outdoor unit to
the service disconnect ground. Also, check for voltage from line to line and line to ground.
Connect the grounded wire to the ground connecting lug in the control box for safety. Connect the power wiring to the top L1 and
L2 lugs of the Booster Compressor contactor. For clarification, consult the wiring diagram (Fig.5, Appendix B) and (Fig. 11, Appendix
D).The 75VA transformer located in the Acadia outdoor unit is factory pre-wired for a 240VAC input. If the unit is being connected
to supply voltages other than 240VAC, consult the wiring diagram (Fig. 9, Appendix B).
ROUTE CONTROL WIRING
To route control wires to the interior of the Acadia outdoor unit, it is nec
control wires into the electrical cabinet. While routing control wires through the unit, avoid routing across or around the Controller,
as this may generate unwanted interference, e.g. static, etc.
CONNECT CONTROL WIRING
(NOTE) If using existing control wiring, be sure the harness is a minimum 10 conductor, 18 AWG and all the wiring is in good
condition.
(NOTE) If the distance between the thermostat and the Acadia outdoor unit is more than 100-ft. or 30.5-m., as measured by the
control wiring, 16 AWG wire should be utilized to avoid an unnecessary voltage drop.
(NOTE) The Acadia outdoor unit is supplied with a 75VA transformer with a built-in 3.7 amp breaker. Disconnect any other low
voltage power supplies.
(NOTE) 24VAC and COM needs to be supplied to the air handler control board; the 24VAC and COM terminals at the top of the
air handler control board.
IMPORTANT: Ensure that no other control voltage transformer is connected to the system. Use only the 75VA transformer
supplied in the Acadia outdoor unit. Disconnect the secondary leads, control voltage wires, from the indoor air handler control
transformer to the air handler control board.
IMPORTANT: Make sure to change the line voltage leads to the 75VA transformer if the line voltage is other than 240VAC.

INSTALLATION STEPS
14
Using 10 or 12-conductor, 18 AWG, color-coded, insulated (35C minimum) wire, connect the control system components between
the Acadia outdoor unit, the indoor air handler unit, and the thermostat, see (Fig. 6 through 9, Appendix B).
All wiring must be NEC Class 1 and must be separated from the incoming power leads. The Acadia outdoor unit has a 75VA, 24VAC
transformer for control power. To ensure correct operation of the system, the 40VA transformer located in the indoor air handler
unit must be disconnected from the control board, and the leads properly insulated to prevent possible shorts.
Following the color codes provided in (Fig 6 through 9, Appendix B), make connections to the Acadia outdoor unit, the indoor air
handler, and the thermostat. Connections may be made using either the 1/4female disconnects or using stripped wire with the
screw terminals provided.
(NOTE) Ensure the supplied thermostat and indoor air handler unit are installed and properly wired.
(NOTE) Ensure the air handler jumpers are placed in the appropriate position and that all wiring follows color code instructions.
CONFIGURING THE HEAT PUMP COMPONENTS
Minimum air flow for the Acadia048 is 1300 CFM or 36.8 m3/min. for a 2nd Stage call. Set the control jumpers in the air handler
accordingly. If using the Factory Supplied air handling unit, the recommended air flow is 1600 CFM or 45.3 m3/min. See (Fig. 4
and Table 10 through 12, Appendix A). Jumper settings are Heat: A, Delay: A, Cool: B, Adjust: A.
Minimum air flow for the Acadia036 is 1000 CFM or 28.3 m3/min. for a 2nd Stage call. Set the control jumpers in the air handler
accordingly. If using the Factory Supplied air handling unit, the recommended air flow is 1200 CFM or 34 m3/min. See (Fig. 4
and Table 10 through 12, Appendix A). Jumper settings are Heat: A, Delay: A, Cool: A, Adjust: A.
Minimum air flow for the Acadia024 is 700 CFM or 19.8 m3/min. for a 2nd Stage call. Set the control jumpers in the air handler
accordingly. If using the Factory Supplied air handling unit, the recommended air flow is 800 CFM or 22.6 m3/min. See (Fig. 4
and Table 10 through 12, Appendix A). Jumper settings are Heat: A, Delay: A, Cool: B, Adjust: B.
If an electric heat package is installed in the indoor air handler unit, be sure the control board is properly configured for the
electric heat package. If using the Factory Supplied air handling unit, move the Heat/No Heatjumper on the control board to
Heat; see (Fig. 4, Appendix A).
Using the table in (Table 13, Appendix A), program the thermostat for proper operation with the Acadia outdoor unit.
It is essential to have a jumper between RC and RH as indicated on the thermostat diagram (Fig. 8, Appendix B) for correct
operation.
IMPORTANT: Ensure the Controller program in the outdoor unit is properly set; P0 for electric back up, P1 for dual fuel back up.
(Step 8 of the Installation Steps).
If the system is using the factory recommended EWC zone control, consult (Fig. 12, Appendix F)for proper wiring using the EWC
zone control.
IMPORTANT: Check the factory wiring and wire connections to ensure the terminations are secured properly. Check the wire
routing to ensure the wires are not in contact with electrical box components, sheet metal, tubing, etc.
Step 7 –Charging of the System
(CAUTION) Ensure both the vapor and liquid line service valves are completely open, back-seated.

INSTALLATION STEPS
15
(NOTE) The minimum outdoor operating ambient in the cooling is 50°F (10°C) and the maximum outdoor ambient in cooling is
125°F (51.7°C). The minimum outdoor operating ambient in heating mode is -30°F (-34.4°C) and the maximum outdoor ambient
in heating is 82°F (27.8°C).
To prevent personal injuries, wear safety glasses, protective clothing, and gloves when handling refrigerant and observe the
following:
(CAUTION) Use only R-410A rated refrigerant equipment.
IMPORTANT: Keep the equipment and manifold hoses clear of debris and moisture.
IMPORTANT: Do not vent refrigerant to the atmosphere. Recover refrigerant before system repairs or final unit disposal.
(CAUTION) If there is ever a question of how much charge has been introduced into the system while charging, recover and re-
charge the system. Record the amount of final charge with a permanent marker on the service sticker where it will be clearly
visible.
Hallowell Line Set Charging Chart
Line Set Length
Acadia 024
Acadia 036 & 048
Line Set Length
Acadia 024
Acadia 036 & 048
(ft)
(m)
lb - oz
kg
lb - oz
kg
(ft)
(m)
lb - oz
kg
lb - oz
kg
0-10
0-3.04
9 - 0
4.08
12 - 8.0
5.67
11
3.35
9 - 0.6
4.10
12 - 8.6
5.69
31
9.45
9 - 12.6
4.44
13 - 4.6
6.03
12
3.66
9 - 1.2
4.12
12 - 9.2
5.70
32
9.75
9 - 13.2
4.46
13 - 5.2
6.04
13
3.96
9 - 1.8
4.13
12 - 9.8
5.72
33
10.06
9 - 13.8
4.47
13 - 5.8
6.06
14
4.27
9 - 2.4
4.15
12 - 10.4
5.74
34
10.36
9 - 14.4
4.49
13 - 6.4
6.08
15
4.57
9 - 3.0
4.17
12 - 11.0
5.75
35
10.67
9 - 15.0
4.51
13 - 7.0
6.10
16
4.88
9 - 3.6
4.18
12 - 11.6
5.77
36
10.97
9 - 15.6
4.52
13 - 7.6
6.11
17
5.18
9 - 4.2
4.20
12 - 12.2
5.79
37
11.28
10 - 0.2
4.54
13 - 8.2
6.13
18
5.49
9 - 4.8
4.22
12 - 12.8
5.81
38
11.58
10 - 0.8
4.56
13 - 8.8
6.15
19
5.79
9 - 5.4
4.24
12 - 13.4
5.82
39
11.89
10 - 1.4
4.58
13 - 9.4
6.16
20
6.10
9 - 6.0
4.25
12 - 14.0
5.84
40
12.19
10 - 2.0
4.59
13 - 10.0
6.18
21
6.40
9 - 6.6
4.27
12 - 14.6
5.86
41
12.50
10 - 2.6
4.61
13 - 10.6
6.20
22
6.71
9 - 7.2
4.29
12 - 15.2
5.87
42
12.80
10 - 3.2
4.63
13 - 11.2
6.21
23
7.01
9 - 7.8
4.30
12 - 15.8
5.89
43
13.11
10 - 3.8
4.64
13 - 11.8
6.23
24
7.32
9 - 8.4
4.32
13 - 0.4
5.91
44
13.41
10 - 4.4
4.66
13 - 12.4
6.25
25
7.62
9 - 9.0
4.34
13 - 1.0
5.92
45
13.72
10 - 5.0
4.68
13 - 13.0
6.27
26
7.92
9 - 9.6
4.35
13 - 1.6
5.94
46
14.02
10 - 5.6
4.69
13 - 13.6
6.28
27
8.23
9 - 10.2
4.37
13 - 2.2
5.96
47
14.33
10 - 6.2
4.71
13 - 14.2
6.30
28
8.53
9 - 10.8
4.39
13 - 2.8
5.98
48
14.63
10 - 6.8
4.73
13 - 14.8
6.32
29
8.84
9 - 11.4
4.41
13 - 3.4
5.99
49
14.94
10 - 7.4
4.75
13 - 15.4
6.33
30
9.14
9 - 12.0
4.42
13 - 4.0
6.01
50
15.24
10 - 8.0
4.76
14
6.35
Table 1: Hallowell Acadia Line Set Charging Chart
To prevent compressor damage or personal injury, observe the following:
Do not overcharge the system; follow the charging chart, weighing in New R-410A refrigerant; see (Table 1 and 14, Appendix C).
Do not operate the Acadia outdoor unit in a vacuum or at negative pressure. Compressor failure would be imminent.

INSTALLATION STEPS
16
Do not disable the low-pressure or high-pressure switches.
The indoor air handler unit filter should be installed and clean.
The indoor air handler unit adjustments should be set correctly. See (Fig. 4 and Table 10 through 12, Appendix A).
Check that all the supply and return registers are clear, not blocked, and open.
Ensure all the covers are in place on the indoor air handler.
Step 8 –Start-up and Programming the Acadia outdoor unit Controller
(NOTE) In the event outdoor temperatures will not allow the full amount of charge into the liquid line service port, complete the
charge through the ¼”charging port after the system is running.
(NOTE) The Acadia outdoor unit compressors are equipped with crank case heaters which operate when low oil sump tempera-
tures occur, ensuring separation of the oil and refrigerant. Ensure the crank case heaters are energized before admitting the
initial charge. If power has been lost or the unit has been de-energized for 4 hours or more after charge has been admitted, allow
the crank case heaters to be energized for a minimum of 12 hours before allowing compressor operation. Not following these
warnings may result in compressor chattering and permanent damage to the compressors.
1. Close the electrical disconnects to energize the system and ensure the system control and thermostat energize.
2. The thermostat must be setup at this time to properly work with your Acadia outdoor unit; see (Table 13, Appendix A).
3. The outdoor unit must be programmed at this time. The controller has no program set from the factory and will flash P0 at start
up. To set the program, push the Fault History button until the desired program is showing. To lock the program, press the
Reset button for one second; the display will stop flashing and lock in the program. P0 is for an installation using electric back
up heat. P1 is for dual fuel using a furnace for back up heat.
4. The program can be changed at any time by pressing the Fault History and Manual/Time-Temp buttons simultaneously until the
display blinks. Pressing the Fault History button, you can change the display to the desired program. To lock in the program,
press the Reset button until the display stops blinking. The program will revert back to prior program if no buttons are pressed
for 5 seconds.
The Economy software jumper comes factory set for Economy Mode (J1). When in temperature Bin D and a Y2 input from the
thermostat is active, either H3 w/Y2OUT or H2 will be run based on the mode selected. See (Table 3 and 4, in Heat Mode, in
Operation Modes).
When set as J0 and in Bin D with Y2 input  
When set as J1 and in Bin D with Y2 input active, then H2 with Y2OUT off. 
The technician change the state of J(x) by:
oIn any mode except Manual, Field Test, Customer Factory Test, or IC Test Eng, press and hold the Reset and
Manual/Time-Temp defrost buttons together.
oFor 2 seconds the current status of the J(x) will be displayed. If buttons are released, the status does not change.
oIf held, the J(x) status will flash for 3 seconds indicating the jumper will change soon. Releasing the buttons while
flashing will abort changing the J(x) status.
oIf held, the J(x) status will change and stay on solid for 2 seconds. After 2 seconds the display will go blank until the
buttons are released.
oWhen in Dual-Fuel (P1) mode, the software jumper is not used.
At power up, when in P1 mode, the display will not display the J0/J1 option.
5. Set the thermostat to Fan ON, ensuring the air flow jumpers are properly placed on the correct pins in the indoor air handler.

INSTALLATION STEPS
17
6. Set the Fan to AUTO or ON as desired, then set the room thermostat to COOL or HEAT. Wait for the appropriate time delay(s).
Operate the system for 30 minutes after the initial charge, ensuring the thermostat setting will not be satisfied. Open windows
or doors if necessary.
(NOTE) While waiting, be sure the line set is secure and insulated separately. This is a good time to double check the installation
procedure. Check over the system for any unusual vibrations and/or noises.
7. Set the room thermostat 10 degrees or more above or below the desired room temperature allowing 2nd Stage operation while
charging. This may bring on a 3rd stage call (W2) from the thermostat and turn on auxiliary heat in the heating mode.
(NOTE) Do not allow the temperature settings to be reached until the charge is complete. Open the doors and windows if
necessary while charging to ensure continuous operation. Be sure the set point is above or below the indoor ambient and is set
high or low enough to keep the desired 2nd Stage energized.
Ensure the proper stage is operating by reviewing the thermostat requirements for a 2nd Stage call, and viewing the indicator display
provided on the Acadia outdoor unit Controller. See (Fig. 2, Appendix A) and (Table 3 through 5) for the location of the LCD
indicator display and the corresponding mode.
Step 9 –Checking the Refrigerant Charge
SYSTEM CHARGING
With the Acadia outdoor unit operating, charge the system (if necessary) with liquid R-410A using a commercial type R-410A rated
gage manifold and hose assembly. Charge the system with refri on the outside of the unit, metering
it slowly. Check the charge in heating mode only. Adjust the charge in heating using the following procedure:
(CAUTION) Additional charge added through the charging line must be slowly metered in to prevent liquid refrigerant from
entering the compressors.
(NOTE) The Acadia system is to be charged in high capacity only (2nd Stage thermostat call).
(NOTE) Above 60°F (16.7°C), charge the system using the line set chart, see (Table 1, Appendix C). A return trip in the heating
season is required to double check the charge amount for optimal efficiency.
HEATING CHARGE CHECK PROCEDURE
(CAUTION) R-410A is miscible with POE oil in the system. Let the system run in normal operation for an adequate amount of
time (20 minutes minimum) after startup or a defrost cycle to ensure an accurate sub-cooling reading.
1. Operate the system a minimum of 20 minutes before checking charge.
2. Measure the liquid service valve pressure by attaching an accurate R-410
3. Measure the liquid line temperature by attaching and insulating an accurate thermistor type or electronic thermometer to the
liquid line near the Acadia outdoor unit. Use the pressure/temperature chart to calculate sub-cooling (Table 15, Appendix C).
4. Refer to the charging table for required sub-cooling temperatures; see (Table 14, Appendix C). If the sub-cooling is other than
what is indicated on the chart, consult Hallowell International Technical Support.
(NOTE) For every 1 lbs. of additional refrigerant added, allow an adequate amount of time (20 minutes minimum) for the system
to settle before taking another sub-cooling reading.

INSTALLATION STEPS
18
Ensure that you have a 2nd Stage call from the thermostat. Set the thermostat well above the indoor ambient and open doors
and windows if needed.
COOLING CHARGE CHECK PROCEDURE
1. The system is charged for heating performance. If the charge of refrigerant is in question, recover the system charge and weigh
in the appropriate charge according to the line set charging chart (Table 1, Appendix C).
2. If the system is installed as a new installation during the cooling season, a return trip to double check the charge amount during
heating season may be necessary.
Step 10 –Final Checks
IMPORTANT: Before leaving the job site, be sure to do the following:
1. Ensure that all wiring and tubing is secure in the system before adding panels and covers. Securely fasten all panels and/or cov-
ers and ensure all fasteners remain tight.
2. Tighten the service valve stem caps to 1/12-turn past finger tight.
3. Ensure the charge amount is written on the service sticker provided on the electrical box cover of the Acadia outdoor unit.
4. customer. Explain the system operation and periodic maintenance requirements outlined
in the manual. Leave the installation manual in the Acadia outdoor unit for future use.
5. Fill out the Dealer Installation Checklist and place in a customer file.
6. Be sure to talk to the customer about the general maintenance; shoveling around the Acadia outdoor unit and keeping it clear
of debris, basic thermostat use, and the importance of periodical filter changes.
7. Discourage the customer from setbacks of the thermostat program. High utility bills may result from a thermostat setback.
8. Talk to the customer about the defrost operation and how it will affect the register temperature.
9. Ensure the supply registers are diffused properly and away from heavy traffic areas and not directly on the customer and/or
seating areas.
10. Ensure the air handler has a proper air filter installed before you leave.
11. Be sure the customer knows where to purchase more air filters.
CARE AND MAINTENANCE
For continuous high performance and to minimize possible equipment failure, periodic maintenance must be performed on this
equipment. Frequency of maintenance may vary depending upon geographic areas, such as coastal applications. Pay close
attention to the cleanliness of the indoor and outdoor coils, proper air circulation, and duct sealing.
An example of a maintenance schedule would be changing the filter once every 1-3 months, an electrical inspection, and an annual
washing of the coils.
In coastal regions, the outdoor coil must be washed annually by a qualified service technician.

OPERATION MODES
19
Figure 2 –Diagnostics Exploded View
OPERATION - COOL MODE
1. With no calls the system is in Standby.
2. The Controller is in Cool Mode with an O signal from the Thermostat and the BLUE COOL Mode LED is lit. The reversing valve is
also energized in cooling. Any change in the O signal causes an Anti-Short Cycle before the RV output is energized or de-
energized, eliminating unnecessary reversing valve cycles. The outdoor fan output (ODF1) is energized any time there is a call
for Cooling. Cool Mode is not allowed below 50°F (10°C).
3. With an O signal, when the Y1 signal is energized, the system is in Cool Mode 1. It will energize the 1st stage of the Primary
Compressor; the Primary Compressor is operating with 1 cylinder. When the Y2 signal is energized, the system is in Cool Mode
2. It will energize the 2nd stage of the Primary Compressor; the Primary Compressor is operating with 2 cylinders. With the Y2
signal energized, the Y2Out output sends a 24VAC signal to the indoor air handler; this signal switches the indoor fan to high
speed.
4. The Booster Compressor is not allowed to operate in the Cool Mode. In the Cool Mode, the operation does not move down
from C2 to C1; this is the same for the Heat Mode. The system operates in Cooling Mode 2 until the thermostat call is satisfied;
this is to reduce the number of compressor cycles that could occur.
Cool Modes
Thermostat Calls
AMB ≥50°F (10°C)
Controller Indicator
Y1 & O
Primary 1-Cylinder
C1
Y2 & O
Primary 2-Cylinders/Y2Out
C2
Table 2: Cool Modes and Y2Out: Y1/Y2 & O vs. Ambient
OPERATION - HEAT MODE
Note: During Dual Fuel mode the transformer in the outdoor unit may need to be relocated into the indoor hot air furnaces.
1. With no calls the system is in Standby.
2. The Controller is in Heat Mode without an O signal from the Thermostat and the Yellow HEAT / EH Mode LED is lit. The reversing
valve is de-energized in heating. When there is a Call for Heat, Y1 and/or Y2 are energized, the outputs that are associated with
the call and the ambient BIN condition are described in Table 3 and Table 4. The Y2Out output sends a 24VAC signal to the
indoor air handler; this signal switches the indoor fan to high speed.