Daikin SWP Series User manual

Original Instruction
Installation Manual IM 1032-2
Group: Applied Air Systems
Part Number: IM 1032
Date: December 2013
Self-Contained Air Conditioning Systems
Type SWP
Vintage H
Refrigerant R-410A
Capacity 20 through 130 tons

Table of ConTenTs
Introduction..................................3
General Description ..........................3
Installation...................................4
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Handling ...................................4
Vibration Isolators ............................4
Location/Service Access.......................5
Removing Shipping Restraints . . . . . . . . . . . . . . . . . . 6
Shipping ...................................6
Arrival at Installation Site ......................6
Disassembling and Reassembling Modular Units....6
Refrigerant Piping—Pressure Relief Valves .......10
Water Connections ..........................10
Duct Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Service Connections.........................11
Long-term Storage ..........................11
Physical Data ...............................13
Unit Physical Data...........................13
Electrical Data...............................14
Field Wiring................................14
Control Center..............................16
Control Panel Components....................17
Typical Wiring Diagrams ......................21
Unit Options ................................32
Duct Static Pressure Sensor...................32
Freezestat.................................32
Condenser Water Flow Switch .................32
Water Side Economizer ......................33
Condenser Water Head Pressure Control ........33
Variable Frequency Drive .....................33
Disconnect Switch...........................33
Dual Power Supply ..........................33
Heating Coil Control .........................33
Spring Return Actuators ......................33
System Check, Test, and Start .................34
General ...................................34
Pre-Start Up ...............................34
Start Up ..................................35
Variable Air Volume (VAV) Start Up..............37
Fan Wheel Alignment ........................37
Final Control Settings . . . . . . . . . . . . . . . . . . . . . . . . 39
Maintaining Control Parameter Records..........39
System Maintenance .........................40
Planned Maintenance ........................40
Condenser Head Assembly and
Gasket Replacement ........................40
Motor Bearings Maintenance ..................41
Fan Bearing Maintenance.....................42
Winterizing Water Coils.......................42
Panels, Frame Channels, and Doors ............43
Replacement Parts List .......................44
Service and Warranty Procedure ...............45
Compressors...............................45
In-Warranty Return Material Procedure ..........46
Warranty Return Material Procedure ............46
Check, Test, and Start Procedure Form ..........47
Environmental Management . . . . . . . . . . . . . . . . . . . 49
Refrigerant Handling and Use..................49
Disposal of Material .........................49
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Table of ConTenTs

InTroduCTIon
General Description
Daikin Applied Self-Contained Air Conditioning units, model
SWP are factory assembled, refrigerant charged and tested,
water-cooled packaged air conditioning units designed for
ducted applications.
Each unit contains multiple hermetic compressors, water
cooled condensers, multi-circuit evaporator, thermal expansion
valves, interconnecting refrigerant piping, supply fan, belt
drive, fan motor, pleated lters and all necessary operating and
safety controls. Units ship fully charged with R-410A refrigerant
unless they are ordered with the modular construction option.
Modular units ship with a nitrogen holding charge. Units with
the modular construction Option can be easily disassembled
for access to mechanical room entries, freight elevators and
other constrictions.
Table 1: VFD Installation, Operation and Maintenance
Literature
Rooftop Unit Control
Conguration Operation Manual Number
VFDs
Daikin Applied 208–460V OM 844
Daikin Applied 575V OM 895
Non-Daikin Applied See vendor manuals
Figure 1: Nomenclature
Optional Variable Frequency Drivers (VFD) are offered. For a
description of operation and information on using the keypad
to view data and set parameters, refer to the appropriate
program-specic operation manual (see Figure 1).
All rigging, installation, power and control wiring external to
the unit, and condenser water and condensate piping are the
responsibility of the installer.
The MicroTech®III self-contained unit controller is standard
equipment. For a detailed description of the MicroTech III
components, input/output congurations, eld wiring options
and requirements, and service procedures, refer to IM 919,
“MicroTech III Unit Controller” For a description of operation
and information on using and programming the MicroTech III
unit controller, refer to OM 920, “Microtech III Unit Controls.
SWP 033 H L M
Self-Contained
Water-Cooled
Plenum Discharge
Nominal Tons
Cabinet
Coil Size
Design Vintage
InTroduCTIon
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InsTallaTIon
Inspection
When the equipment is received, carefully check all items
against the bill of lading to ensure a complete shipment. Do
not sign the shipping receipt until all items are accounted for.
Carefully inspect all units for damage upon arrival. Report
all shipping damage to the carrier and le a claim. Before
unloading the unit, check the unit serial plate to be sure it
agrees with the power supply available.
NOTE: Check for concealed damage as soon as possible.
Handling
WARNING
Never allow any part of the unit to fall during unloading or
moving as this can cause equipment damage, severe
personal injury, or death.
CAUTION
Do not attempt to install dollies in the center of the unit. Units
can become unstable and tip over, causing injury
CAUTION
Do not move units in an upended position. Internal components
may tear away, causing injury.
Units ship with a protective covering that should remain in
place while the unit is being moved to its nal location.
Units are provided with lifting lugs for rigging with a crane. If
units are lifted by crane, use slings or cable to protect against
chafng damage and use spreader bars across the top of the
cabinet to prevent any structural damage to the frame.
The unit base frame accepts dollies or Johnson bars for
transporting the unit. Place furniture dollies at all lift point
locations and use a Johnson bar at one end for maneuvering.
Vibration Isolators
All units are provided with 1" neoprene isolation pads, shipped
separately. Using the instructions provided in the shipment,
install pads beneath the unit, locating them at each corner and
at 1/2 the length of each side base channel. Evenly space the
additional pads under the remaining base channels.
NOTE: Only qualied personnel familiar with local codes
and regulations and experienced with this type
of equipment should perform installation and
maintenance
Figure 2: Isolation Pad Placement
(1/2)L
(1/2)L
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Location/Service Access
To facilitate installation and provide service, and maintenance
access, follow the recommended clearances in Table 2.
Minimum clearances required by local, state, or federal codes
such as the NEC take precedence over those listed below.
Clearance is required to allow room for lter access, mechanical
cleaning of the condenser tubes and economizer coil, access to
expansion valves and other control components, and to allow for
possible fan shaft or compressor removal.
Table 2: Recommended Clearances
Location Clearance Length, inches (mm)
Control panel 42 (1067)
Unit rear, lter section 24 (610)
Access side 36 (914)
Unit front 36 (914)
Opposite access side 18 (457)
Figure 3: Recommended Service and Maintenance Clearance
30
WATER SUPPLY
WATER RETURN
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Removing Shipping
Restraints
Mechanical restraints are used to secure the spring-mounted
fan during shipment. Remove the restraints and the shipping
blocks after unit is set in its nal location.
Shipping
All units leave the factory assembled completely. Units
intended to be disassembled contain a nitrogen holding
charge. Non-modular units will hold the manufacturer
recommended refrigerant charge (R410A).
Arrival at Installation Site
The unit must be unloaded in accordance with the rigging
instructions displayed on the outside of the unit or in the
installation manuals inside. The lifting lugs located inside
the unit base rail are the only lifting lugs to use for lifting the
complete unit. Never use any individual section lifting lugs to lift
the whole unit.
Some items are shipped lose inside units such as lters and
rubber isolator pads. All units should be inspected before
unloading and all lose items secured.
Disassembling and
Reassembling Modular Units
To avoid injuries or damage to the equipment, please read the
installation manual (IM 919) before rigging or disassembling
the unit. Follow all the warning and caution labels placed on
the unit.
Disassembly of Sections
If the unit is ordered with the modular construction (Unit
Conguration Code 43 = 1) option, the refrigerant circuits are
shipped with a nitrogen holding charge (Unit Conguration
Code 11 = NP) and can be disassembled into four pieces. A
unit not originally intended to be disassembled will have R410A
refrigerant factory charge that must be properly recovered
before disassembly.
Figure 4 illustrates the four distinct sections;
1. Coil/access section,
2. Supply fan section,
3. Compressor/condenser section and
4. the Control panel.
Figure 4: Self-Contained Unit with Four Sections Separated
In addition to refrigerant and water piping, the unit has
various standard and optional components that cross
between sections which will require eld disconnection and
reconnecting or mounting:
Coil/Access Section
• Mixed air sensor (MAT)
• Plastic tube for clogged lter switch (PC5)
• Freezstat(s) (FS*)
• Actuator Harness(es) (ACT3 & ACT4)
• Ultra Violet Light harness (es)
• Waterow Sensor (WFS)
• Entering Water Temperature (EWT)
Supply Fan Section
• Discharge Air Temperature (DAT)
• Plastic tube for air ow switch (PC7) and Duct
High Limit (DHL)
• Supply Fan motor power harness
• Supply Fan Door Switch (S21)
• Electric Heat high limit switch(es) (HL*)
• Electric Heat power harness
Compressor/Condenser Section
• Pressure Transducer Harnesses (PSR1 & 2)
• Compressor High Pressure Switches (HP*)
• Compressor Low Pressure Switches (LP*)
• Compressor Motor Protection (MP*)
• Compressor power harnesses
External
• Return Air Temperature (RAT)
• Plastic tube for the Static Pressure Sensor(s) (SPSI & 2)
• Outside Air Temperature (OAT)
• Zone or Space Temperature (ZNT1)
* Quantities vary with unit size
Coil/Access Section
Supply Fan Section
Compressor/Condenser Section
Control Panel
Base Fish Plates
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Disassembly
1. Open the fan section access door and remove any item
placed in the section during shipping.
2. Open the Control Box doors and remove any item placed
during shipping, such as lter clips and isolation pads.
3. Review the wiring schematics and wiring connections
inside the control box. Disconnect control and
power connections for the supply fan motor and all
compressors. Control wires are plugged into the Patch
Panel on the right side. Disconnect the tubing on PC5,
PC7 and DHL pressure switches.
4. Disconnect sensor wires from the control box that go out
to the other sections. Place the wire harnesses in the
section where their respective sensor is located.
5. The top panel of the Control Panel Box should be
removed to allow two eye bolts with nuts to be installed
and used for rigging. Connect the lifting hooks to the eye
bolts and lift to secure the clamps and provide support
to the Control Box in transition. Remove the steel plates’
screws (Figure 5); close the panel doors and lift carefully
to remove the section completely (See Figure 7).
NOTE: To remove panels, at or right angle painted plates;
T-30 TORX drive is required.
Figure 5: Painted Steel Plates
Figure 6: Assembled Self-Contained Unit Showing Steel Plate Locations and Type
Flat Plate
Right Angle Plate
See Figure 5
1) Flat Plate
2) Right Angle Plate
1
1
1
2
2
2
2
2
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6. Remove all top paneling and the intermediates. Use the
supply fan assembly base frame to lift the whole section.
Hook points have been added to the design. Fan sizes
40" and larger will use AVKs and eyebolts. Use long
enough chains to avoid exerting pressure on the fan or
the motor from the side. Lift the fan section slowly until
it is supported. Remove the painted steel plates (at
and right angle) connecting the section to compressor/
condenser section and coil/access section. Balance the
tension in the lifting chains to pull the section back ve
inches to disengage the splice collar frame from the coil
section. Lift the fan section carefully and slowly away
from the unit (See Figure 8).
7. Once the supply fan section is removed, the compressor/
condenser section can be accessed from the top.
Remove the side access panels on both sides of the
section (Right or Left hand units). Locate and remove
the Victaulic couplings of the water pipes (15/16"
wrench or socket). Relieve the Nitrogen charge in each
refrigerant circuit before cutting any refrigerant line. Cut
Refrigerant lines (liquid and suction) at locations that will
be accessible to brazing during unit reassembly. See
(Figure 9) for suggested cut area. Cover the refrigerant
pipes on both sides of the cut to avoid contamination.
NOTE: The model shown has four circuits. Number of circuits
ranges from two on small units to eight on large ones.
There may be more lines to cut on large units. Mark
circuits if necessary, to avoid confusion.
8. Remove painted at steel plates (from the side)
connecting this section with the coil sections (same
plates connecting fan, coil and condenser/compressor
sections). Remove the double galvanized steel plates
connecting the base sections together to split the coil/
access section from the compressor/condenser section
with a 9/16" wrench or socket. Splitting the two sections
apart will expose the other four lifting brackets. Use
the four base lifting brackets on each section for lifting.
Use spreader bars to keep the lifting chains away from
the section frame to prevent any damage to the unit
structure. The center of gravity is higher than the base
level. Handle the section carefully to avoid tilting.
9. The base lifting lugs must be used to lift the coil section
(See Figure 10). Spreader bars are needed to prevent
the chains from exerting lateral pressure on the coil
frame.
CAUTION
Coil section is heavier than the fan section. Lifting chains used
on this section must have the proper safety ratings. Table 3
lists the weights of maximum individual sections for each unit
size group.
Figure 7: Control Box Lifting
Figure 8: Supply Fan Section Lifting
CAUTION
Condenser/compressor section is heavier than the fan
section. Lifting chains used on this section must have the
proper safety ratings. Table 3 lists the weights of maximum
individual sections for each unit size group.
WARNING
The center of gravity is higher than the base level.
CAUTION
Coil section is the tallest and has many delicate parts that can
be damaged easily as a result of falling or bumping into walls
or other equipment. Any damage to the section may require a
coil replacement. Handle the coil section slowly and carefully
(restrain as required) to avoid tilting.
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Table 3: Maximum Weights of Individual Sections (lbs.)
Unit Size Condenser/
Compressor Coil Fan Control Panel
Small 1850 1750 1200 300
Small Tall 2250 1900 1450 300
Medium 2450 2550 1850 400
Large 2550 3000 2450 450
Large Tall 4300 3550 2900 500
8 Compressor 4500 3550 3250 650
Figure 9: Condenser/Compressor Section and Coil Section
Ready for Separation
Figure 10: Coil Section and Compressor/Condenser
Section
Reassembly
1. Starting with the coil/access section, attach the double
galvanized steel plates to the base.
2. Line up the compressor/condenser section with the coil/
access section. Slide the compressor/condenser section
towards the coil section. Attach the two sections using
the double galvanized steel plates. Install painted steel
plates (at) in their respective areas.
3. Braze the refrigerant (liquid and suction) lines between
two sections (Note: R410A design working pressure is
450 PSI. or as indicated on the unit data label). Similar
factory joints are brazed with Copper-Phosphoros-2%
Silver brazing rods.
4. Connect water pipes using the Victaulic couplings. Test
water pipes for leaks in areas with new connections. Test
refrigerant pipes for leaks in new brazed areas.
5. Evacuate, test and charge the refrigerant circuits with
R410A. See dataplate for refrigerant charge amount per
circuit.
6. Lift the supply fan section taking care to align the splice
joint to seat into the mating gasket of the coil/access
section to provide an air tight seal. All corners of the unit
sections must line up before some of the at and right
angle steel plates can be installed to stabilize the fan,
coil and compressor/condenser sections together.
7. All units have shipping brackets holding the fan tight
in place during shipping. Remove brackets before
commissioning the fan section and adjust the spring
isolators before installing the control panel box.
8. Organize all wire harnesses in each section and get
them ready to reconnect to the Control Panel.
9. Lift the Control Panel into place. Attach the section using
painted at and right angle steel plates (Figure 5). After
the control box is secure, re-connect power wires, control
plugs and sensors.
CAUTION
Keep your hands at a safe distance from the unit while guiding
the wires into the control panel during installation. Make sure
no wire get caught under the Control panel box frame.
WARNING
Re-install interconnecting wires only, after the panel has been
set and secured.
Victaulic
Coupling on
Water Pipe
Suggested
Cutting Area
for Refrigerant
Lines
Cut Liquid and Suction
Lines and Remove the
Victaulic Coupling
3/8"Hexagon Head Bolts
Sections are hinged
with chains and
spreader bars for lifting
Arrows show lifting
bracket locations
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Refrigerant Piping—Pressure
Relief Valves
(ETL Marked Units Only)
All units have individual refrigerant circuits and each circuit is
provided with a spring loaded relief valve. The valve is set to
open when refrigerant pressure reaches 600 psig. The relief
valve accommodates a 3/8" are connection for applications
where it is necessary to connect vent piping and run it outside
the building.
CAUTION
When refrigerant is vented to the outside of the building,
install the vent piping as recommended in ASHRAE Standard
15-1994. Failure to vent properly can result in personal injury.
Water Connections
Due to the variety of piping practices, follow the
recommendations of local authorities. They can supply the
installer with the proper building and safety codes required for
proper installation.
For best performance, install the piping with a minimum
number of bends and elevation changes. Size piping to
minimize system pressure drop.
Piping should contain the following:
1. Vibration eliminators to reduce vibration and noise
transmission to the building.
2. Shutoff valves to isolate the unit from the piping system
during unit servicing.
3. Manual or automatic air vent valves at the high points of
the system.
4. Some means of maintaining adequate system water
pressure (e.g., expansion tank or regulating valve).
5. Temperature and pressure indicators located at the unit
to aid in servicing.
6. A strainer or some means of removing foreign matter,
which can damage the pump and shorten unit life, from
the water before it enters the pump. Such damage is
not covered by warranty. Place it far enough upstream
to prevent cavitation at the pump inlet (consult pump
manufacturer for recommendations). Using a strainer
prolongs pump life and helps maintain system
performance.
Condenser Piping
1. Units can be specied with water and condensate
connections on either the left or right side of the unit.
2. All condensers are factory piped for a common condenser
water supply and a common condenser water return
connection.
3. Make eld piping connections to factory-provided piping,
locating them as indicated on the unit submittal drawings.
Run the piping connections to the outside of the unit
cabinet. Standard connections are ODS copper with
victaulic connections.
4. Make supply and return water connections at the proper
locations as indicated by the dimensional drawings.
5. Units with factory-mounted water side economizer should
not require head pressure control. The economizer
typically elevates the water temperature by 5°F to
10°F before entering the condenser, allowing suitable
condenser water temperatures whenever the tower supply
temperature is 50°F (10°C) or higher. Mechanical cooling
is locked out below 55°F (12.8°C) EWT.
6. If entering condenser water temperatures will go below
55°F (12.8°C), provide head pressure control. Fan cycling
and/or modulating discharge dampers on the cooling
tower are often used, or a 3-way bypass around the
tower is used to maintain condenser water temperature.
If multiple units are in the loop, it is generally more cost
effective to use cooling tower control to maintain the
temperature at >55°F (12.8°C).
The factory installed water regulating valve is placed in
the water line entering the condenser; and shuts down
to prevent water from siphoning out of the condensers.
For systems where a constant pumping head is required,
install the water regulating valve in a bypass line around
the condensers. It then must open on falling discharge
pressure.
These typical systems, depending on the specic
application, must maintain a constant condensing
pressure regardless of temperature conditions and must
provide adequate head pressure for proper thermostatic
expansion valve operation. A minimum head pressure of
294 psi (21.3 bar.) (95°F [35°C] condensing temperature)
is recommended.
7. Condenser tube velocities must not exceed 10' per
second (3 m/s) (approximately 7.5 gpm/ton [0.47 lps/ton]).
Figure 11: Condenser Regulating Valve
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Condensate Drain Connection
The condensate drain connection is 1.25" NPT and is generally
located on the same end of the unit as the condenser water
connections. Run drain lines and traps full size from drain pan
connection. The trap depth and the distance must be twice the
static pressure in the drain pan section under normal operation
so the trap remains sealed. Pitch the condensate line away
from the unit with a minimum slope of 1/8" per foot (3.2 mm/0.3
meters).
Keep drain pans and the drain trap clean by periodic cleaning.
Duct Connections
Refer to submittal drawings for duct connection dimensions.
Supply Air
To connect supply ductwork directly to the unit, rst mount a
duct collar at the fan outlet. Fan discharge opening sizes are
indicated on the unit dimensional drawings. Daikin Applied
recommends a canvas type connecting collar.
WARNING
Unit cannot be started until the ductwork is installed to avoid
injury
Return Air
Return air to the unit can be ducted or free, as follows.
Ducted return
Attach return ductwork to the 2" ange around the perimeter
of the unit’s return air opening. Use a canvas-type duct
connecting collar. All ductwork connected to the unit must be
of adequate size and construction for the application. Also
use a canvas-type connector where the duct penetrates the
machine room wall(s). This helps prevent vibration generated
by air movement in the duct from being transmitted out to the
occupied spaces.
Free return
Use the mechanical equipment room as a return plenum with
no hard connection at the unit.
NOTE: Some building codes do not allow using the
mechanical room as a return plenum. Check
applicable local codes for each installation.
Service Connections
Left-Hand—Right-Hand
Service connections are determined when facing the back
of the unit. Right-hand connections are standard; left-hand
connections are optional.
Long-term Storage
Project delays or site conditions can require the storage of
Daikin Applied Self-Contained Air Conditioning Units for an
extended period of time.
Location
The Daikin Applied Self-Contained Air Conditioning Unit is an
indoor unit. Care must be taken to store the unit indoors away
from weather conditions. While the area does not need to be
air conditioned, Daikin Applied recommends that the electronic
control equipment in the unit be stored in a 5% to 95% RH
(non-condensing) environment.
Shrink Wrap
Do not allow the shrink wrap to trap moisture on the outside
or inside surfaces of the unit. Shrink wrap must be removed
immediately after installation. Once the shrink wrap is removed
the unit(s) cannot be stored outdoors.
Preparation
Check that unit is set on a level surface and access panels are
properly secured.
Supply Fans
1. Move the motor base to check and lubricate slides and
lead screws.
2. Remove the drive belts and store them in the fan section.
3. Pack fan and motor bearings (unless motor bearings
are sealed) with compatible grease with the shaft
stationary. After grease has been installed, rotate shaft
about 10 rotations.
4. Isolate unit from shock and vibration.
5. Once a month, rotate shaft a minimum of 10 revolutions.
Insure the stopped position is different than the original
position.
6. Coat shafts with lubricant as needed to prevent corrosion.
7. A descant bag may be hung in the interior of the unit to
minimize corrosion in humid storage environments.
8. Do not clean galvanized steel surfaces with oil dissolving
chemicals. This may remove the protective coating and
accelerate corrosion.
9. Adjustable sheaves should be opened as wide as
possible and the adjustment threads lubricated so they
do not corrode. Be careful not to put lubricant on the belt
running surface.
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Cooling circuits
1. Close all the refrigerant service valves on each circuit.
2. Tag the valves as a warning for the technician who will
be restarting the units.
3. If the unit has already been lled with cooling tower
water, drain the unit completely. The condenser (and
waterside economizer if it has one) is (are) mechanically
cleanable, remove the condenser head tube plugs and
thoroughly clean. See “Condenser Head Assembly and
Gasket Replacement” on page 42.
4. Flush the internal condensate trap with antifreeze
solution if the unit will be subjected to freezing
temperatures.
5. Once a month, manually stroke the control valves to
prevent seizing.
Restart
After extended storage, a very complete start up must be
performed. Inevitable accumulations of dirt, insect nests, etc.
can contribute to problems if not cleaned out thoroughly prior to
start up. In addition, thermal cycling will have tended to loosen
mechanical and electrical connections. The following start up
procedure will help discover these and other issues that may
have developed during the storage interval.
Prior to Start Up
1. Set screws on bearings, fan wheels, and sheaves need
to be checked for proper torque. Also check bolt torque
for any taper lock hubs either on the wheel or sheaves.
2. Check sheaves for corrosion. Signicant corrosion can
cause belt or sheave failure.
3. Purge old grease from fan bearings while rotating the
shaft to distribute the new grease evenly and prevent
bearing seal failure.
4. Correctly align and tension belts. See “Drive Sheave
Alignment” on page 38 and “Drive Belt Adjustment” on
page 39.
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PhysICal daTa
Unit Physical Data
Table 4: SWP 023 Through SWP 130
Data SWP model size
023 028 033 039 040 044 050 056 062 065 073 080 088 099 105 120 130
Compressor
Quantity 2 3 3, 4 4 6 8
Size See unit data plate
Evaporator coil
Face area (ft2) 25.2129.8145.2152.5160.9171.31
Rows 5 6
Waterside economizer coil
Face area (ft2) 25.2129.8145.2152.5160.9171.31
Rows 4
Electric heat
Nom. Output (kW) 34 34, 68
Evaporator fan (SAF)
Quantity 1
Size224.5 27.0 36.5 44.0
Note:
1. Maximum size coil to t in unit. Smaller size coils can be used for these units.
2. Maximum fan diameter. Units may have previous smaller size.
Table 5: Single Compressor Circuit Charge, R-410A
Compressor
(HP)
Refrigerant charge
per circuit (R-410A)1
Oil charge
per circuit (oz)
6 30 lbs 60
8 30 lbs 85
9 30 lbs 110
10 35 lbs 110
13 35 lbs 110
15 35 lbs 110
Note:
Actual refrigerant charge is calculated for each unit and is listed on the unit
data plate. When possible, always use the unit data plate for refrigerant charge
quantity.
PhysICal daTa
www.DaikinApplied.com 13 IM 1032-2 • Self-Contained Air Conditioning Systems

eleCTrICal daTa
Field Wiring
General
Wiring must comply with all applicable codes and ordinances.
Daikin Applied’s product warranty does not cover equipment
failures caused or contributed to by wiring not in accordance
with specications. A tripped manual motor protector (MMP)
or open fuse indicates a short, ground or overload. Before
replacing a fuse or restarting a compressor or fan motor, locate
the trouble and correct. Use copper wire for all power lead
terminations. Contact the factory for information concerning
aluminum wire power lead terminations.
A single power terminal block is provided as standard, and
wiring within the unit is done in accordance with the National
Electric Code (NEC). Each branch circuit within the control
panel is individually protected by fuse or MMP. A single eld-
supplied disconnect is required or a unit-mounted, non-fused
disconnect can be ordered with the unit.
A knockout is located on the right or left front unit upright for
locating unit power entry. 24 V eld connections are suitable for
Class II wiring.
Unit Disconnect
Disconnecting means are addressed by Article 440 of the NEC,
which requires “disconnecting means capable of disconnecting
air conditioning and refrigerant equipment including motor-
compressors, and controllers, from the circuit feeder.” Select
and locate the disconnect switch within the NEC guidelines.
Location requirements per NEC are that the disconnect is
located in a readily accessible position within sight (50 feet) of
the unit. A factory-mounted, non-fused disconnect is available.
Return Air and Outside Air Sensors
All units are provided with a return air sensor. It is connected
to the patch panel and is coiled and placed in the control box
of the unit for shipment. Field-installation is required to put it in
the return air stream for proper unit operation. The return air
sensor is connected to the unit’s patch panel at location PL1
(see IM 919).
The outside air sensor is optional and can be ordered with the
unit. The outside air sensor is eld wired to terminal strip TB2.
It is connected at terminals 122, 123, and 123G.
The mixed air temperature sensor is already installed at the air
inlet.
Mount the sensors in areas that are exposed to representative
temperature conditions. Mount them at a position that has good
air mixing and does not have stratication. Sensors can be
mounted in the ductwork using a grommet (see Figure 12).
Figure 12: Return/Outside Air Sensor Mounting
Table 6: Compressor Motors
Compressor
(hp) Refrigerant 208V/60Hz/3Ø 230V/60Hz/3Ø 460V/60Hz/3Ø 575V/60Hz/3Ø 415V/50Hz/3Ø
RLA LRA RLA LRA RLA LRA RLA LRA RLA LRA
6 R-410A 21.0 182 19.0 164 8.4 75 6.8 54 7.9 75
7 R-410A 20.2 182 19.6 164 11.6 100 9.8 78 — —
8 R-410A 23.2 216 22.5 195 11.3 95 9.0 80 — —
9 R-410A 26.9 249 25.0 225 12.6 114 9.6 80 — —
10 R-410A 30.3 264 28.2 239 14.2 125 10.6 80 13.6 145
11 R-410A 35.4 271 32.0 245 15.5 125 12.6 100 — —
13 R-410A 40.8 332 38.5 300 18.3 150 17.4 109 17.2 139
15 R-410A 49.8 376 48.4 340 18.5 173 20.2 132 21.9 196
IM 1032-2 • Self-Contained Air Conditioning System 14 www.DaikinApplied.com
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Table 7: SAF Motor Nameplate Amperage
Horsepower Type 208/60/3 230/60/3 400/50/31460/60/3 575/60/3
FLA FLA FLA FLA FLA
3Premium efciency 9.3 8.2 4.1 4.1 3.1
5Premium efciency 15.7 13.6 6.8 6.8 5.2
7.5 Premium efciency 22.3 20.0 10.0 10.0 7.4
10 Premium efciency 29.0 25.8 12.9 12.9 10.3
15 Premium efciency 43.4 37.8 18.9 18.9 14.1
20 Premium efciency 57.0 49.0 24.5 24.5 18.9
25 Premium efciency 70.0 61.0 30.5 30.5 24.2
30 Premium efciency 83.3 72.4 36.2 36.2 29.8
40 Premium efciency 110.0 96.0 48.0 48.0 38.0
50 Premium efciency 137.0 120.0 60.0 60.0 47.5
60 Premium efciency 160.0 140.0 70.0 70.0 56.0
Note:
1. 460/60/3 motors are used. Derate nameplate horsepower to 0.83 to obtain actual horsepower.
Supply Power Wiring
1. Units require three-phase power supply.
2. Allowable voltage tolerances:
a. 60 Hertz
Nameplate 208 V: Min. 187 V, Max. 229 V
Nameplate 230 V: Min. 207 V, Max. 253 V
Nameplate 460 V: Min. 414 V, Max. 506 V
Nameplate 575 V: Min. 518 V, Max. 632 V
b. 50 Hertz
Nameplate 400 V: Min. 342 V, Max. 418 V
3. Power lead wire sizing:
a. For units with cooling capability (all concurrent
loads) with or without hot water heating and circuits
with motor loads only: MCA = 1.25 (largest motor
RLA or FLA) + other loads
4. Size wires in accordance with Table 310-16 or Table 310-
19 of the National Electrical Code.
5. Size wires for a maximum of 3% voltage drop.
Lug Size
Table 8: Lug sizes for single disconnect
Disconnect size Lug size
100 #12-3/0
150 #12-3/0
250 #8-350 MCM
400 (2) #8-600 MCM
600 (2) #8-600 MCM
Table 9: Lug sizes for power block
Power block size Lug size
310 #6-350 MCM
420 #2-600 MCM
570 (2) #4-300 MCM
Note:
Use copper wire only. 760 (2) #6-500 MCM
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www.DaikinApplied.com 15 IM 1032-2 • Self-Contained Air Conditioning Systems

Control Center
All electrical controls are enclosed in a central control center
located at the side of the unit. The control center is divided into
two separate compartments, one for high voltage and one for
low voltage. The lower compartment houses the high voltage
components and can be accessed through the “Electrical
Access” panels indicated on the dimensional drawing. High
voltage components include:
• Fan motor contactor, M30/M30I/M30B/M10
• Fan motor protector, MMP9, MMP10, MMP30
• Fan motor circuit breaker, CB10
• Compressor contactors, M1–M8
• Compressor motor protector, MMP1–MMP8
•Transformer, T1, T2, T3
• Disconnect switch, DS1–DS2
• Power block, PB1–PB2
If the optional disconnect switch is provided, the switch handle
is visible and accessible without removing any safety or access
panels.
Low voltage components are located in the upper right
compartment and include:
• MicroTech III main control board, MCB
• I/O Expansion Module A, B, and C optional
• Duct static pressure sensor, SPS1
• Optional 2nd duct static pressure sensor, SPS2
• Optional BACnet®/IP communication module
• Optional BACnet MS/TP communication module
• Optional LONWORKS®communication module
NOTE: IM 919 has additional layouts of the control center.
Figure 13: Typical 460 Volt, 6-Compressor Control Center Layout, High and Low Voltage Compartments (ETL Only)
IM 1032-2 • Self-Contained Air Conditioning System 16 www.DaikinApplied.com
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Control Panel Components
Manual Motor Protector (MMP)
The manual motor protector (MMP) provides coordinated
branch circuit, short circuit protection, a disconnecting means,
a motor controller, and coordinated motor overload protection.
The MMP trip points are factory set and locked, see Figure
14. Do not change unless the motor ampacity changes or the
MMP is replaced with a new device with incorrect set point
adjustment. Any other non-authorized trip point or set point
adjustment voids all or portions of the unit’s warranty. Setpoint
values are published on the schematic, near the MMP for each
MMP. The MMP should be set to the value published on the
schematic and locked by the factory.
To reset a tripped MMP, clear the trip by rotating the knob
counterclockwise to the OFF position; then rotate the knob
clockwise to the ON position. See “2” in Figure 14.
WARNING
If an overload or a fault current interruption occurs, check
circuits to determine the cause of the interruption. If a fault
condition exits, examine the controller. If damaged,replace it
to reduce the risk of re or electrical shock.
Figure 14: Manual Motor Protector
Circuit Breaker
Circuit breakers are installed upstream of all VFDs to provide
short circuit protection (Figure 15).
To reset a tripped circuit breaker: Clear the trip by rotating the
lever down to the OFF position. Then rotate lever up to the ON
position.
Other MMP features:
• Three-position rotary operator: OFF-TRIP-ON. See “2” in
Figure 15.
• Lockout—tagoutable rotary operator: turn the rotary
operator to OFF, slide out the extension arm, and insert a
lockout pin.
• Ambient compensated –20°F to +60°F
• Single-phase sensitivity: if one phase exceeds set point,
all three phases open.
• Trip test: insert a 9/64" screw driver in the slot to simulate
a trip. See “3” in Figure 15.
Figure 15: Circuit Breaker
Three-Position
Rotary Switch
2
Trip Test
Slot
3
Factory
Trip Point
Lock
Set Point
Adjustment 1
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www.DaikinApplied.com 17 IM 1032-2 • Self-Contained Air Conditioning Systems

Disconnect
The optional disconnect is a molded case switch with many of
the same features of the circuit breaker. The disconnect comes
standard with a through-the-door handle and mechanism
(Figure 16) to disconnect power to the unit prior to opening the
door. The handle can be padlocked in the OFF position while
performing maintenance to the unit.
CAUTION
Molded case switches do not provide over-current protection.
This device may automatically open the circuit at levels above
the ampere rating of the switch.
Figure 16: Through-the-Door Handle Disconnect
WARNING
Disengaging interlock exposes high voltage that can
cause severe personal injury or death. Do not touch
exposed components. Wear dry clothes and stand on a
dry,nonconducting surface. Do not wear jewelry. Work with
another trained, experienced technician nearby.
Terminals
All eld wiring terminals are spring clamp type, which offer
several advantages over traditional screw-type terminals:
• Spring connections do not require torquing
• Spring connections resist failure due to vibration
•Easily identiable terminal markers
• Combination spring release and square test ports
To insert a wire to the terminal connector:
1. Insert a small at-blade screwdriver into the square hole
(“1” in Figure 17) to open the spring clamp (“2” in Figure
17) adjacent to the desired wire location .
2. Strip approximately 1/2" of insulation from the wire.
3. Insert the stripped wire into the wire terminal (“1” in
Figure 17).
4. Remove the screwdriver to close the spring clamp.
Figure 17: Terminal Connectors
Disengage
interlock
mechanism
(located here)
by inserting a
small object here
(a pen works) and
pulling down.
1
2
2
1
2
1
IM 1032-2 • Self-Contained Air Conditioning System 18 www.DaikinApplied.com
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Phase Voltage Monitor (PVM)
The phase voltage monitor is designed to help protect
three-phase loads from damaging power conditions. A
microprocessor-based voltage and phase-sensing circuit
constantly monitor the three-phase voltages to detect harmful
power line conditions. When a harmful condition is detected,
its output relay is deactivated after a specied amount of
time (Trip Delay). The output relay reactivates after power
line conditions return to an acceptable level for a specied
amount of time (Restart Delay). The trip and restart delays
prevent nuisance tripping due to rapidly uctuating power line
conditions.
Other features:
• LED display to indicate status (see “1” in Figure 18)
• Loss of phase
• High or low voltage
• Voltage imbalance
• Phase reversal
• Rapid cycling
• Standard 1 to 500 second variable restart delay (see “2”
in Figure 18)
• Standard 2% to 8% variable voltage imbalance (see “3” in
Figure 18)
• Standard 1 to 30 second trip delay (see “4” in Figure 18)
Figure 18: Phase Voltage Monitor
High Pressure Switches
(ETL Marked Units Only)
The high pressure switch (HP1-HP8) is a single pole pressure
activated device that opens on a pressure rise. When the
switch opens, it de-energizes the compressor circuit, shutting
down the compressor. The MicroTech III controller displays an
alarm condition. Once the cause of the fault is identied and
corrected, manually reset the unit through the MicroTech III
keypad/display interface. The control is attached to a Shrader
tting and is located at the compressor. To check the control,
shut off water ow to the condensers and observe the cutout
point on a high pressure gauge. The high pressure control
should open at 500 psig and close at 380 psig. After testing
the high pressure control, check the pressure relief device for
leaks.
Low Pressure Switches
The low pressure switch (LP1-LP8) is a single pole, pressure
activated device that closes on a pressure rise. It senses
evaporator pressure and is factory set to close at 120 psig and
open at 70 psig. Compressor operation is not allowed until the
switch closes. The low pressure switch is an automatic reset
control. If the condition occurs on any one compressor three
times in a 24-hour period, the alarm has to be reset manually
through the MicroTech III keypad/display interface to restart the
compressor. The low pressure switch is attached to a Shrader®
tting and is located at the compressor.
Compressor Motor Protector
All compressors are thermally protected. The solid state
protection device (MP1-MP8) is located in the compressor
junction box. Whenever the protection system opens, the
compressor shuts down for 30 minutes, and the MicroTech III
controller displays an alarm indication.
The solid state protection device is used on the following:
• Independent circuits—13, 15 hp
The in-line protection control automatically resets when the
alarm condition is removed and the time delay is satised.
The in-line protection device is used on the following:
• Independent circuits—6, 8, 10 hp
If the condition occurs on any one compressor three times in
a 24-hour period, the alarm has to be manually reset through
the MicroTech III keypad/display interface to restart the
compressor.
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www.DaikinApplied.com 19 IM 1032-2 • Self-Contained Air Conditioning Systems

Clogged Filter Switch
A clogged lter switch (PC5) is provided to indicate when the
unit lters are to be changed. The switch is factory set to close
at 1.0 inches of H2O. The switch has a eld-adjustable set
point range of 0.05 to 5.0 inches of H2O. Turn the adjustment
screw clockwise to decrease differential pressure setting. Turn
the adjustment screw counterclockwise to increase differential
pressure setting. When the lter pressure differential exceeds
the switch setpoint, MicroTech III controller displays a clogged
lter indication. The unit is allowed to continue operation. PC5 is
located in the main control panel.
Phase Fail/Under Voltage
Protection
The phase voltage monitor (page 19) protects against high
voltage, phase imbalance, and phase loss (single phasing)
when any one of three line voltages drops to 74% or less of
setting. This device also protects against phase reversal when
improper phase sequence is applied to equipment and protects
against low voltage (brownout) when all three line voltages drop
to 90% or less of setting. An indicator run light is ON when all
phase voltages are within specied limits. The phase voltage
monitor is located on the load side of the power block with a set
of contacts wired to the 115-volt control circuit to shut down the
unit whenever phase voltages are outside the specied limits.
Duct High Limit
A duct high limit (DHL) pressure control is provided as
standard with all units with variable air volume control. The
duct high limit is intended to protect the ductwork, etc. from
over pressurization caused by tripped re dampers or a control
failure. When the duct pressure exceeds the setting of the
control, the unit de-energizes via the MicroTech III controller,
which displays an alarm condition. After the reason for trip is
identied and corrected, reset the control via the MicroTech III
keypad/display interface.
The duct high limit control is factory installed, including sensing
tubing, and preset for a 3.0" inches of H2O trip point. The control
can be readjusted in the eld to match the specic ductwork of
a project. The switch has a eld-adjustable set point range of
0.05 to 5.0 inches of H2O. Turn the adjustment screw clockwise
to decrease differential pressure setting. Turn the adjustment
screw counterclockwise to increase differential pressure setting.
The DHL is located in the main control panel.
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