Daikin Maverick I Instruction Manual

Installation and Maintenance IM 972-2
Group: Applied Air Handling
Part Number: IM 972
Date: November 2018
Maverick®I
Commercial Packaged Rooftop Systems
Heating & Cooling
Models MPS015B - MPS025B
15 to 25 Tons
R-410A Refrigerant

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Introduction..................................3
General ....................................3
Hazardous Information Messages ...............3
Safety Information ............................3
Mechanical Installation ........................4
Checking Product Received ....................4
Major Components ...........................4
General ....................................4
Pre-Installation Check-Points ...................4
Filter Replacement ...........................4
Location Considerations .......................5
Clearances .................................5
Horizontal Conversion Procedure ................5
Outside Slab Installation .....................5
Downow to Horizontal ......................6
Attaching Exhaust and Combustion Air
Inlet Hoods ...............................6
Rooftop Installation ..........................7
Ducting ....................................9
Return Air .................................9
Gas Supply, Condensate Drain ................9
Dual Voltage Inducer 208 – 230 Volt Models ....10
LP Conversion ............................11
Condensate Drain .........................13
Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . 14
Wiring ....................................14
Power Supply.............................14
Hook-Up.................................15
Internal Wiring ............................15
208 Volt Applications .......................15
Customer Supplied Thermostat ..............16
Optional Factory Supplied Thermostat..........16
Wiring Diagrams ............................17
Physical Data ...............................22
Unit Capacity and Physical Data................22
Compressor and Condenser Motor ............23
MCA and MCOP . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Auxiliary Heater Kit Performance..............24
Dimensional Data ............................27
Unit Dimensions MPS 015B – 025B ............27
Horizontal Duct Dimensions .................29
Curb Dimensions .........................29
Performance Data............................30
Accessories ................................33
Economizers ..............................33
Horizontal Duct Installation ..................34
Fresh Air Dampers and Power Exhaust ..........35
Motorized Damper Kit ........................36
Outdoor Air Hood ...........................36
Roofcurbs .................................37
Controls and Operation .......................38
Furnace Section Controls and Ignition System .....38
Normal Furnace Operating Sequence ..........38
Operating Instructions ........................40
Burners .................................40
Manual Reset Over-Temperature Control .......40
Pressure Switch ..........................40
Limit Control .............................40
Cooling Section Operation ....................41
Cooling Mode.............................41
Continuous Fan Mode ......................41
Maintenance ................................42
General Maintenance ........................42
Advise the Customer .......................42
Unit Maintenance ...........................42
Furnace Section...........................42
Lubrication ..............................43
Cooling Section ...........................43
System Charge Charts .......................44
Troubleshooting .............................47
Troubleshooting Charts .......................47
Warranty ...................................50
Replacement Parts ..........................50

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General
This manual contains the installation and operating instructions
for your packaged rooftop system. There are some precautions
that should be taken to derive maximum satisfaction from it.
Improper installation can result in unsatisfactory operation or
dangerous conditions. Read this manual and any instructions
packaged with separate equipment prior to installation. Give
this manual to the owner and explain its provisions. The owner
should retain this manual for future reference.
Hazardous Information Messages
CAUTION
Cautions indicate potentially hazardous situations, which can result in
personal injury or equipment damage if not avoided.
WARNING
Warnings indicate potentially hazardous situations, which can result in
property damage, severe personal injury, or death if not avoided.
DANGER
Dangers indicate a hazardous electrical situation which will result in death
or serious injury if not avoided.
DANGER
Dangers indicate a hazardous gas situation which will result in death or
serious injury if not avoided.
NOTICE
Notices give important information concerning a process, procedure,
special handling or equipment attributes.
Safety Information
NOTICE
The manufacturer’s warranty does not cover any damage or defect to
the air conditioner caused by the attachment or use of any components,
accessories or devices (other than those authorized by the manufacturer)
into, onto, or in conjunction with the air conditioner. you should be aware
that the use of unauthorized components, accessories or devices may
adversely affect the operation of the air conditioner and may also endanger
life and property. The manufacturer disclaims any responsibility for such
loss or injury resulting from the use of such unauthorized components,
accessories or devices
WARNING
Install this unit only in a location and position as specied in the Mechanical
Installation section of these instructions. Provide adequate combustion and
ventilation air to the unit space as specied in the venting section of these
instructions.
DANGER
Provide adequate combustion and ventilation air to the unit space as
specied in the combustion and ventilation air section of these instructions.
Combustion products must be discharged outdoors. Connect this unit to an
approved vent system only, as specied in Mechanical Installation section
of these instructions.
Use only with type of gas approved for this unit. Refer to the unit rating
plate.
Never test for gas leaks with an open ame. It can cause an explosion or re
resulting in property damage, personal injury or death. Use a commercially
available soap solution made specically for the detection of leaks to check
all connections, as specied in the Mechanical Installation section of these
instructions.
Always install unit to operate within the unit’s intended temperature-rise
range with a duct system which has an external static pressure within the
allowable range, as specied in the Mechanical Installation section of these
instructions. See also unit rating plate.
WARNING
Units are not design certied to be installed inside the structure. Doing so
can cause inadequate unit performance as well as property damage and
carbon monoxide poisoning resulting in personal injury or death.

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Checking Product Received
IMPORTANT
Check the unit model number, heating size, electrical characteristics, and
accessories to determine if they are correct.
Upon receiving the unit, inspect it for any damage from
shipment. Claims for damage, either shipping or concealed,
should be led immediately with the shipping company.
Major Components
The unit includes a hermetically-sealed refrigerating system
consisting of a scroll compressor, condenser coil, evaporator
coil with capillary tube assembly, a supply air fan, a condenser
fan, a heat exchanger assembly, gas burner and control
assembly, combustion air motors and fan, and all necessary
internal electrical wiring. The cooling system of these units
is factory-evacuated, charged and performance tested.
Refrigerant amount and type are indicated on rating plate.
The unit is available in 250,000 AND 350,000 BTUH heating
input with nominal cooling capacity of 15 tons. 300,000 and
400,000 BTUH heating inputs are available in nominal cooling
capacity of 20 and 25 tons. Units are convertible from bottom
supply and return to side supply and return by relocation of
supply and return air cover panels.
The units are weatherized for mounting outside of the building.
General
NOTICE
When a unit is installed so that supply ducts carry air circulated by the unit
to areas outside the space containing the unit, the return air shall also be
handled by duct(s) sealed to the unit casing and terminating outside the
space containing the unit.
Install this unit in accordance with The American National
Standard Z223.1-latest edition manual entitled “National Fuel
Gas Code,” and the requirements or codes of the local utility or
other authority having jurisdiction.
Additional helpful publications available from the “National
Fire Protection Association” are: NFPA-90A - Installation of Air
Conditioning and Ventilating Systems 1985 or latest edition.
NFPA-90B - Warm Air Heating and Air Conditioning Systems
1984.
These publications are available from:
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
Pre-Installation Check-Points
WARNING
This unit may be used to heat the building or structure during construction
if the following installation requirements are met. Installation must comply
with all installation instructions including:
• Proper vent installation
• Furnace operating under thermostatic control
• Return air duct sealed to the furnace
• Air lters in place
• Set furnace input rate and temperature rise per rating plate marking
• Means of providing outdoor air required for combustion
• Return air temperature maintained between 55°F (13°C) and 80°F
(27°C)
• Installation of exhaust and combustion air inlet hoods completed
• Clean furnace, duct work and components upon substantial
completion of the construction process, and verify furnace operating
conditions including ignition, input rate, temperature rise and venting,
according to the instructions
IMPORTANT
Before operating unit, remove compressor shipping supports from the
compressor base. Failure to remove supports will cause noise and vibration.
1. Before attempting any installation, carefully consider the
following points:
a. Structural strength of supporting members (rooftop
installation)
b. Clearances and provision for servicing power
supply and wiring
c. Gas supply and piping
d. Air duct connections and sizing
e. Drain facilities and connections
f. Location for minimum noise and vibration - away
from bedroom windows
Filter Replacement
This unit is provided with 3–18" × 18" × 2" and 3–18" × 24" × 2"
disposable lters. When replacing lters, ensure they are
inserted fully to the back to prevent bypass.
Recommended supplier of this lter is AAF International:
• Part #: 54-42541-01 (18" × 18" × 2")
• Part #: 54-42541-03 (18" × 24" × 2")

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Location Considerations
The metal parts of this unit may be subject to rust or
deterioration in adverse environmental conditions. This
oxidation could shorten the equipment’s useful life. Salt spray,
fog or mist in seacoast areas, sulphur or chlorine from lawn
watering systems, and various chemical contaminants from
industries such as paper mills and petroleum reneries are
especially corrosive.
If the unit is to be installed in an area where contaminants are
likely to be a problem, give special attention to the equipment
location and exposure.
1. Avoid having lawn sprinkler heads spray directly on the
unit cabinet.
2. In coastal areas, locate the unit on the side of the
building away from the waterfront.
3. Shielding by a fence or shrubs may give some
protection.
4. Frequent washing of the cabinet, fan blade and coil
with fresh water will remove most of the salt or other
contaminants that build up on the unit.
5. Regular cleaning and waxing of the cabinet with a good
automobile polish will provide some protection.
6. A good liquid cleaner may be used several times a year
to remove matter that will not wash o󰀨 with water.
Several di󰀨erent types of protective coatings are o󰀨ered in
some areas. These coatings may provide some benet, but the
e󰀨ectiveness of such coating materials cannot be veried by
the equipment manufacturer.
The best protection is frequent cleaning, maintenance, and
minimal exposure to contaminants.
Clearances
The minimum clearances shown in Figure 3 on page
6 must be observed for proper unit performance and
serviceability.
Horizontal Conversion Procedure
Outside Slab Installation
NOTICE
These units are designed certied for outdoor installation only. Installation
inside any part of a structure can result in inadequate unit performance as
well as property damage. Installation inside can also cause recirculation
of ue products into the conditioned space resulting in personal injury or
death.
Typical outdoor slab installation is shown in Figure 1.
1. Select a location where external water drainage cannot
collect around unit.
2. Provide a level slab su󰀩ciently high enough above grade
to prevent surface water from entering the unit
3. Locate the unit to provide proper access for inspection
and servicing as shown in Figure 3.
4. Locate unit where operating sounds will not disturb
owner or neighbors.
5. Locate unit so roof runo󰀨 water does not pour directly on
the unit. Provide gutter or other shielding at roof level.Do
not locate unit in an area where excessive snow drifting
may occur or accumulate.
6. Where snowfall is anticipated, the height of the unit
above the ground level must be considered. Mount
unit high enough to be above anticipated maximum
area snowfall and to allow combustion air to enter the
combustion air inlet.
7. Select an area which will keep the areas of the vent,
air intake, and A/C condenser ns free and clear of
obstructions such as weeds, shrubs, vines, snow, etc.
Inform the user accordingly.
Figure 1: Outside Slab Construction

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1. Remove the screws and covers from the outside of the
supply and return sections. Also remove and discard the
cover plate.
2. Install the covers over the bottom supply and return
openings, painted side up, inserting the leading ange
under the bracket provided. Place the back ange to top
of the front bracket provided. See Figure 2 and Figure 3.
3. Secure the return and supply cover to front bracket with
two (2) screws.
Figure 2: Horizontal Conversion Detail
Attaching Exhaust and Combustion Air
Inlet Hoods
IMPORTANT
Do not operate this unit without the exhaust/ combustion air inlet hood
properly installed.
The hood ships in a carton in the blower compartment inside
the unit and must be attached when the unit is installed.
To attach exhaust/combustion air inlet hood:
1. Remove screws securing blower access panel and
remove access panel. For location of blower access
panel.
2. Remove exhaust/combustion air inlet hood from the
carton, located inside the blower compartment.
3. Attach blower access panel.
4. Attach the combustion air inlet/exhaust hood with
screws. Screws are in carton with the hood.
5. Vent the unit using the ue exhaust hood, as supplied
from the factory, without alteration or addition. The only
exception is with factory approved additions.
Figure 3: Clearances
Step 2
Step 1
A
B
*D
E
C
VERTICAL
CLEARANCE
+WITHOUT HORIZONTAL ECONOMIZER/ 42” WITH
HORIZONTAL ECONOMIZER
RECOMMENDED
CLEARANCE LOCATION
80”
18”
18/42”
18/48”
60”
*WITHOUT ECONOMIZER/48” WITH
ECONOMIZER
A–FRONT
B–CONDENSER COIL
+
C–DUCT SIDE
*D–EVAPORATOR END
E–ABOVE

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Figure 4: Unit Mounted on Roofcurb
Rooftop Installation
NOTICE
If unit will not be put into service immediately, block off supply and return air
openings to prevent excessive condensation.
1. Before locating the unit on the roof, make sure that
the roof structure is adequate to support the weight
involved. (See “Wiring Diagrams” & “Physical Data” in
this manual.) THIS IS VERY IMPORTANT AND THE
INSTALLER’S RESPONSIBILITY.
2. Remove shipping boards.
3. For rigging and roof curb details, see Figure 5 and Figure
6.
4. The location of the unit on the roof should be such as to
provide proper access for inspection and servicing.
Figure 5: Lifting Detail

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Figure 6: Roof Curb
UNIT
ROOFCURB
INST
ALLGASKET
RETURN DUCT
50-3/4”X22” [1289x559 mm] MAX
SUPPLY DUCT
42” X23-3/4” [1089X603 mm] MAX CAULKALL JOINTS
WATERTIGHT
NAILINGSTRIP

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Ducting
DANGER
Never connect return ductwork to any other heat producing device such as
replace insert, stove, etc. Unauthorized use of such devices may result
in re, carbon monoxide poisoning, explosion, personal injury, property
damage or death.
NOTICE
In the event that the return air ducts must be run through an “unconned”
space containing other fuel burning equipment, it is imperative that the user
be informed against future changes in construction which might change this
to a “conned space.” Also, caution the user against any future installation
of additional equipment (such as power ventilators), within the existing
unconned and/or conned space which might create a negative pressure
within the vicinity of other solid, liquid, or gas fueled units.
The installing contractor should fabricate ductwork in
accordance with local codes. Use industry manuals as a
guide when sizing and designing the duct system. Contact
Air Conditioning Contractors of America, 1513 16th St. N.W.,
Washington, D.C. 20036.
Place the unit as close to the conditioned space as possible
allowing clearances as indicated. Run ducts as directly as
possible to supply and return outlets. Use of non-ammable
weatherproof exible connectors on both supply and
return connections at unit to reduce noise transmission is
recommended.
On ductwork exposed to outside temperature and humidity,
use a minimum of 2" of insulation and a vapor barrier.
Distribution system in attic, furred space or crawl space should
be insulated with at least 2" of insulation. Half-inch to 1"
thick insulation is usually su󰀩cient for ductwork inside the air
conditioned space.
Provide balancing dampers for each branch duct in the supply
system. Properly support ductwork from the structure.
Return Air
DANGER
Never allow products of combustion or the ue products to enter the return
air ductwork, or the circulating air supply. All return ductwork must be
adequately sealed and secured to the furnace with sheet metal screws and
joints must be taped. All other duct joints must be secured with approved
connections and sealed airtight.
Failure to prevent products of combustion from being circulated into the
living space can create potentially hazardous conditions, including carbon
monoxide poisoning that could result in personal injury or death.
Gas Supply, Condensate Drain
Gas Connection
IMPORTANT
Connect this unit only to gas supplied by a commercial utility.
DANGER
Never test for gas leaks with an open ame. It can cause an explosion or re
resulting in property damage, personal injury or death. Use a commercially
available soap solution made specically for the detection of leaks to check
all connections as specied in the “Mechanical Installation” section of these
instructions.
1. Install gas piping in accordance with local codes and
regulations of the local utility company. In the absence
of local codes, the installation must conform to the
specications of the National Fuel Gas Code, ANSI
Z223.1 - latest edition.
NOTE: The use of exible gas connectors is not permitted.
2. Connect the gas line to the gas valve supplied with unit.
Routing can be through the gas pipe opening shown in
Figure 7 or through the base as shown in Figure 15 on
page 14.
3. Size the gas line to the furnace adequate enough to
prevent undue pressure drop and never less than 1/2".
4. Install a drip leg or sediment trap in the gas supply line
as close to the unit as possible.
5. Install an outside ground joint union to connect the gas
supply to the control assembly at the burner tray.
6. Gas valves have been factory installed. Install a manual
gas valve where local codes specify a shut-o󰀨 valve
outside the unit casing (Figure 7).
7. Make sure piping is tight. A pipe compound resistant to
the action of liqueed petroleum gases must be used at
all threaded pipe connections.
8. IMPORTANT: Any additions, changes or conversions
required for the furnace to satisfactorily meet the
application should be made by a qualied installer,
service agency or the gas supplier, using factoryspecied
or approved parts. In the commonwealth of
Massachusetts, installation must be performed by a
licensed plumber or gas tter for appropriate fuel.

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Figure 7: Suggested Gas Piping
IMPORTANT: Disconnect the furnace and its individual shuto󰀨
valve from the gas supply piping during any pressure testing
of that system at test pressures in excess of 1/2 pound per
square inch gauge or isolate the system from the gas supply
piping system by closing its individual manual shuto󰀨 valve
during any pressure testing of this gas supply system at
pressures equal to or less than 1/2 PSIG.
IMPORTANT: Check the rating plate to make certain the unit
is equipped to burn the type of gas supplied. Care should be
taken after installation of this equipment that the gas control
valve not be subjected to high gas supply line pressure.In
making gas connections, avoid strains as they may cause
noise and damage the controls. A backup wrench is required to
be used on the valve to avoid damage.
The capacities of gas pipe of di󰀨erent diameters and lengths in
cu.ft. per hr. with pressure drop of 0.3 in. and specic gravity of
0.60 (natural gas) are shown in Table 1.
After determining the pipe length, select the pipe size which will
provide the minimum cubic feet per hour required for the gas
input rating of the furnace. By formula:
Cu. Ft. per Hr. Required = Gas Input of Furnace (BTU/Hr)
Heating Value of Gas (BTU/Ft3)
The gas input of the furnace is marked on the furnace
rating plate. The heating value of the gas (BTU/Ft3) may be
determined by consulting the local natural gas utility or the LP
gas supplier.
Table 1: Gas Pipe Capacity Table (Cu. Ft./Hr.)
Nominal
Iron Pipe
Size
Equivalent Length of Pipe, Feet
10 20 30 40 50 60 70 80
1/2" 132 92 73 63 56 50 46 43
3/4" 278 190 152 130 115 105 96 90
1" 520 350 285 245 215 195 180 170
1-1/4" 1,050 730 590 500 440 400 370 350
1-1/2" 1,600 1,100 890 760 670 610 560 530
Dual Voltage Inducer 208 – 230 Volt
Models
Models with gas heat feature a dual voltage draft inducer in the
furnace section. In installations where the supply voltage to the
equipment is 208 VAC, as measured using a volt meter, the
voltage tap on the furnace inducer must be changed to ensure
proper operation. This is similar to changing the tap on the
24VAC transformer.
1. Disconnect all power to the equipment.
2. Remove the control access, compressor access, and
furnace shield panels.
3. Locate the two black power wires with white connectors
going to the furnace inducer. Those will be connected to
a white wire and a black wire coming from the inducer
motor housing.
4. Disconnect the black power wire from the black inducer
wire, remove the protective cap from the red inducer
wire.
5. Connect the black power wire to the red inducer wire,
install the protective cap on the black inducer wire.
6. Reinstall the covers removed, Furnace, compressor
access, and control access.
7. Proceed to “Adjusting or Checking Furnace Input” on
page 11.
Figure 8: Factory Installed Inducer Motor Wiring
Figure 9: Recommended Field Wiring of Inducer Motor

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LP Conversion
DANGER
This unit is equipped at the factory for use with natural gas only. Conversion
to LP gas requires a special kit supplied by the distributor or manufacturer.
Mailing addresses are listed on the furnace rating plate, parts list and
warranty. Failure to use the proper conversion kit can cause re, carbon
monoxide poisoning, explosion, personal injury, property damage, or death.
Convert the unit to use liqueed petroleum (LP) gas by
replacing with the gas valve supplied in the conversion kit. The
LP gas valve maintains the proper manifold pressure for LP
gas. The correct burner LP orices are included in the kit. See
Figure 8 for component locations.
IMPORTANT: To remove the natural gas valve, remove the
four screws securing the manifold pipe to the burner tray.
Remove the manifold pipe with gas valve attached.
NOTE: Order the correct LP conversion kit from the furnace
manufacturer. See Conversion Kit Index shipped with
unit for proper LP kit number. Furnace conversion to
LP gas must be performed by a qualied technician.
Adjusting or Checking Furnace Input
• Natural Gas Line Pressure: 5"–10.5" W.C.
• LP Gas Line Pressure: 11"–13" W.C.
• Natural Gas Manifold Pressure: 3.5" W.C
• LP Gas Manifold Pressure: -10" W.C.
Supply and manifold pressure taps are located on the gas
valve body 1/8" N.P.T. and on the manifold (see Figure 9).
Use a properly calibrated manometer gauge for accurate gas
pressure readings.
Only small variations in the gas ow should be made by means
of the pressure regulator adjustment. Furnaces functioning
on LP gas must be set by means of the tank or branch supply
regulators. The furnace manifold pressure should be set at 10”
W.C. at the gas control valve.
To adjust the pressure regulator, remove the regulator vent
cover and turn the adjustment screw clockwise to increase
pressure or counterclockwise to decrease pressure (Figure 11).
Then replace the regulator vent cover securely.
Any necessary major changes in the gas ow rate should be
made by changing the size of the burner orices. To change
orice spuds, shut o󰀨 the manual main gas valve and remove
the gas manifold.
For elevations up to 2,000 feet, rating plate input ratings apply.
For high altitudes (elevations over 2,000 ft.), contact Daikin
Parts.
Check of input is important to prevent over-ring of the furnace
beyond its design-rated input. NEVER SET INPUT ABOVE
THAT SHOWN ON THE RATING PLATE. Use the following
table or formula to determine input rate.
Cu. Ft./Hr. Required = Heating Value of Gas (BTU/CuFt) × 3600
Time in Seconds for 1 Cu. Ft. of Gas
Start the furnace and measure the time required to burn one
cubic foot of gas. Prior to checking the furnace input, make
certain that all other gas units are shut o󰀨, with the exception of
pilot burners. Time the meter with only the furnace in operation.
IMPORTANT NOTE FOR ALTITUDES ABOVE 2,000 FEET
(610 METERS): The main burner orices in your furnace and
in these kits are sized for the nameplate input and intended
for installations at elevations up to 2,000 feet in the USA or
Canada, or for elevations of 2,000 - 4,500 feet (610 - 1,373
meters) in Canada if the unit has been derated at the factory.
For elevations above 2,000 feet (610 meters) IN THE USA
ONLY (see ANSIZ223.1), the burner orices must be sized to
reduce the input 4% for each 1,000 feet (305 meters) above
sea level.
NOTICE: Derating of the heating input for high altitude in the
eld is unlawful in Canada (refer to CAN/CGA 2.17). Units
installed in altitudes greater than 2,000 feet (610 meters)
must be shipped from the factory or from a factory authorized
conversion station with the heating input derated by 10% so
as to operate properly in altitudes from 2,000 - 4,500 feet (610
1,373 meters).

IM 972-2 • MAVERICK I ROOFTOP SYSTEMS 12 www.DaikinApplied.com
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Figure 10: Heat Exchanger Component Identication
Figure 11: Honeywell VR8305Q4120 Two Stage Gas Valve
OUTLET PRESSURE
TAP-1/8 NPT
2-STAGE
OPERATOR
INLET PRESSURE
TAP-1/8 NPT
GROUND
TERMINAL
LOW STAGE ADJUSTMENT
UNDER VENT CAP HIGH STAGE ADJUSTMENT
UNDER VENT CAP

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www.DaikinApplied.com 13 IM 972-2 • MAVERICK I ROOFTOP SYSTEMS
Table 2: Meter Time in Minutes and Seconds for Normal Input Rating of Furnaces Using Natural or LP Gas
Input Btu/
hr
Meter Size
Cu. Ft.
Heating Value Of Gas Btu Per Cu. Ft.
900 1000 1040 1100 2500
Min. Sec. Min. Sec. Min. Sec. Min. Sec. Min. Sec.
40,000 One 1 21 1 30 1 34 1 39 3 45
Ten 13 30 15 0 15 36 16 30 37 30
60,000 One 0 54 1 0 1 3 1 6 2 30
Ten 9 0 10 0 10 24 11 0 25 0
80,000 One 0 41 0 45 0 47 0 50 1 53
Ten 6 45 7 30 7 48 8 15 18 45
100,000 One 0 33 0 36 0 38 0 40 1 30
Ten 5 24 6 0 6 15 6 36 15 0
Table 3: LP Gas Pipe Capacity (Cubic feet per hour)
Nominal
Iron Pipe
Size, Inches
Length of Pipe, Feet
10 20 30 40 50 60 70 80 90 100
1/2 275 189 152 129 114 103 96 89 83 78
3/4 567 393 315 267 237 217 196 182 173 162
1 1,071 732 590 504 448 409 378 346 322 307
1-1/4 2,205 1,496 1,212 1039 913 834 771 724 677 630
1-1/2 3,307 2,299 1,858 1,559 1,417 1,275 1,181 1,086 1,023 976
2 6,221 4,331 3,465 2,992 2,646 2,394 2,205 2,047 1,921 1,811
Condensate Drain
The condensate drain connection of the evaporator is threaded
1" nominal iron pipe.
IMPORTANT: Install a condensate trap to ensure proper
condensate drainage (Figure 12).
Figure 12: Condensate Drain

IM 972-2 • MAVERICK I ROOFTOP SYSTEMS 14 www.DaikinApplied.com
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Wiring
Power Supply
DANGER
Power supply to the unit must be disconnected before making eld
connections. To avoid electrical shock, personal injury or death, be sure to
rigorously adhere to eld wiring procedures regarding proper lockout and
tagout of components.
1. All wiring should be made in accordance with the
National Electrical Code. Consult the local power
company to determine the availability of su󰀩cient power
to operate the unit. Check the voltage at power supply to
make sure it corresponds to the unit’s RATED VOLTAGE
REQUIREMENT. Install a branch circuit disconnect near
the rooftop, in accordance with the N.E.C., C.E.C. or
local codes.
2. It is important that proper electrical power is available at
the unit. Voltage should not vary more than 10% from
that stamped on the unit nameplate. On three phase
units, phases must be balanced within 3%.
3. For branch circuit wiring (main power supply to unit
disconnect), the minimum wire size for the length of
run can be determined from Table 4 using the circuit
ampacity found on the unit rating plate. Use the smallest
wire size allowable from the unit disconnect to the unit.
Wire size based on 75°C rated wire insulation for 1%
voltage drop.
4. For more than 3 conductors in a raceway or cable, see
the N.E.C. (C.E.C. in Canada) for derating the ampacity
of each conductor.
5. For through-the-base wiring entry, reference Figure
15. All ttings and conduit are eld-supplied for this
application. Reference Table 5 for proper hole and
conduit size.
IMPORTANT: This unit is approved for use with copper
conductors only connected to unit contactor. Warranty will be
voided if aluminum wire is connected to unit contactor.
Figure 13: Recommended Branch Circuit Disconnect
Location
Figure 14: Base Entry Locations (Cooling Only)
Figure 15: Base Entry Locations (Gas Heat)
DISCONNECT
RUN THERMOSTAT
WIRINGIN THIS
CHASETO
CONTROL
BOARD
(2) CAP PLUGS
BASE
CONTROL
ENTRY
BASE
POWER
ENTRY
POWERWIRES
FROM DISCONNECT
TO TERMINAL BLOCK
WASHERS
CONTROL VOLTAGE
KNOCKOUT
WIRE FROM
ZONE THERMOSTAT
STRAIGHT CONDUIT
FITTING
CONDUITFROM
ZONE THERMOSTAT
CONDUIT FROM
POWER SUPPLY
SIZED PERCHART
STRAIGHTCONDUIT
FITTING SIZED
PERCHART
WIRE SIZE FROM
MIN. CIRCUITAMPACITY
CUT HOLE
SIZED PER CHART
OR USEKNOCK OUT
GASLINE
EXTERNALMANUALGAS
SHUT-OFF VALV E
RUNTHERMOSTAT
WIRING IN THIS
CHASE
TO CONTROL
BOARD

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www.DaikinApplied.com 15 IM 972-2 • MAVERICK I ROOFTOP SYSTEMS
Table 4: Minimum Wire Sizes for Given Wire Length
Unit MCA Supply Wire Length in Feet
50 100 150 200 250 300
20 10 8 6 4 4 4
25 10 8 6 4 4 3
30 8 6 4 4 3 2
35 8 6 4 3 2 1
40 8 6 4 3 2 1
45 8 4 3 2 1 1/0
50 6 4 3 2 1 1/0
60 6 4 2 1 1/0 2/0
70 4 3 2 1/0 2/0 3/0
80 4 3 1 1/0 2/0 3/0
90 3 2 1/0 2/0 3/0 4/0
100 3 2 1/0 2/0 3/0 4/0
110 2 1 2/0 3/0 4/0 250
125 1 1 2/0 3/0 4/0 25
Table 5: Recommended Wire Sizes for Given Conduit and Hole Size
Wire Size, AWG 14 12 10 8 6 4 3 2 1 0 00 000
Conduit Size 1/2" 1/2" 1/2" 3/4" 1" 1" 1-1/4" 1-1/4" 1-1/2" 1-1/2" 2" 2"
Hole Size 7/8" 7/8" 7/8" 1-31/32" 1-23/64" 1-23/64" 1-23/32" 1-23/32" 1-31/32" 1-31/32" 2-15/32" 2-15/32"
Hook-Up
To wire unit, refer to Figure 23 on page 27 for location of
wiring entrances. Wiring to be done in the eld between the
unit and devices not attached to the unit, or between separate
devices which are eld installed and located, shall conform
with the temperature limitation for Type T wire [63°F rise
(35°C)] when installed in accordance with the manufacturer’s
instructions.
Internal Wiring
A diagram of the internal wiring of this unit is located on the
inside of control access panel and in this manual. If any of the
original wire as supplied with the unit must be replaced, the
wire gauge and insulation must be same as original wiring.
208 Volt Applications
Transformer is factory wired for 230 volts on 208/230 volt
models and must be changed for 208 volt applications. See
unit wiring diagram for 208 volt wiring.

IM 972-2 • MAVERICK I ROOFTOP SYSTEMS 16 www.DaikinApplied.com
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Customer Supplied Thermostat
The customer supplied room thermostat must be compatible
with the spark ignition control on the unit. Generally, all
thermostats that are not of the “current robbing” type are
compatible with the integrated furnace control. The low voltage
wiring should be sized as shown in Table 6.
Install the room thermostat in accordance with the instruction
sheet packed in the box with the thermostat.
Figure 17 on page 17 for an example of a typical customer
supplied wiring diagram.
Table 6: Field Wire Size for 24 Volt Thermostat
Solid Copper Wire, AWG
Thermostat
Load Amps
3.0 16 14 12 10 10 10
2.5 16 14 12 12 10 10
2.0 18 16 14 12 12 10
Length of Run – Feet (1)
50 100 150 200 250 300
NOTE: (1) The total wire length is the distance from the furnace to the
thermostat and back to the furnace. DO NOT USE CONTROL WIRING
SMALLER THAN NO. 18 AWG.
Optional Factory Supplied Thermostat
The optional factory supplied T-170 commercial setback digital
thermostat (Figure 16) uses microcomputer technology to
provide precise time and temperature control. This thermostat
o󰀨ers the exibility to design heating and cooling programs that
t building needs (refer to Table 7). Figure 18 for an optional
factory supplied thermostat wiring diagram.
Figure 16: Optional T-170 Thermostat
Table 7: Optional Factory Supplied Thermostat
Specications
Electrical Rating Single Stage: mV to 30 V (ac), NEC Class II, 50/60 Hz
or DC
Electrical Rating Staging: 20 to 30 V (ac), NEC Class II
Terminal Load: 5 A per terminal, 2.5 A max. combined
Setpoint Range: 45° to 99°F (7° to 37°C)
Anticipation, Heating: Adjustable
Anticipation, Cooling: Adjustable
󰀨 Heat 0.5° to .5°F, Cool 0.8° to 2.2°F
󰀨 Heat 0.5° to .5°F, Cool 0.5° to 2.2°F
Operating Ambient: 32° to +0°F (0° to +43°C) Operating
Humidity 90% non-condensing max.
Shipping Temperature Range: -4° to 50°F (-20° to 65°C)
Dimensions (H ×W ×D): 4-1/8" × 6-7/8" × 1-3/8"

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www.DaikinApplied.com 17 IM 972-2 • MAVERICK I ROOFTOP SYSTEMS
Wiring Diagrams
Figure 17: Typical Customer Supplied Thermostat Wiring Diagram
Figure 18: Optional Factory Supplied T-170 Thermostat Wiring Diagram

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Figure 19: Wiring Diagram: MPS 015B – 025B, 208-230/460 V (Gas Heat)

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Figure 20: Wiring Diagram: MPS 015B – 025B, 208-230/460 V (Cooling Only)

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Figure 21: Wiring Diagram: MPS 015B – 025B, 575V (Gas Heat)