Daikin Trailblazer AGZ030-101E User manual

Installation, Operation,
and Maintenance Manual
Trailblazer®
Air-Cooled Scroll Compressor Chillers
󰀩

30 to 241 Tons (100 to 840 kW)

50/60 Hz
IOM 1206-13
Group: Chiller
Part Number: IOM1206-13
Date: September 2020

IOM 1206-13 • TRAILBLAZER®MODEL AGZ CHILLERS 2 www.DaikinApplied.com


©2020 Daikin Applied. Illustrations and data cover the Daikin Applied product at the time of publication and we reserve the right to
make changes in design and construction at any time without notice.

 ..........5
 .......................18
Dimensions and Weights - Packaged Units ......24
 ...32
...........................38
 ..........................
Pressure Drop Data ..........................43
Electrical Data...............................47
Unit Controller Operation .....................52
 .......................63
 ..............................70
............................80
Alarms .....................................
Using the Controller..........................
...........................
Startup and Shutdown Procedures ............103
Unit Maintenance ...........................108
Troubleshooting Chart ......................114
............116
 ....................121

* Heat Recovery option is
outside the scope of AHRI
ACCL Certication Program.

Cut Here 
©2019 Daikin Applied Form SF-18002 19 Feb 2019
Pre-Start Checklist – Scroll Compressor Chillers
Must be completed, signed, and provided to Daikin Applied at least 2 weeks prior to requested start date.
Job Name
Installation Location
Customer Order Number
Model Number(s)
G.O. Number(s)
Chilled Water and Condenser Water for Water-cooled Chiller
Yes
No
N/A
Initials
Piping Complete
Water strainer(s) installed in piping per manual requirements
Water System – flushed, filled, and vented; Water treatment in place
Cooling tower flushed, filled, vented; Water treatment in place (if applicable)
Pumps installed and operational (rotation checked, strainers cleaned)
Controls operational (3-way valves, face/bypass dampers, bypass valves, etc.)
Water system operated and tested; flow meets unit design requirements
Flow switch(es) - installed, wired, and calibrated
Vent installed on evaporator
Glycol at design % (if applicable)
Electrical
Yes
No
N/A
Initials
Building controls operational
*Power leads connected to power block or optional disconnect
Power leads have been checked for proper phasing and voltage
All interlock wiring complete and compliant with Daikin specifications
Power applied at least 12 hours before startup
Oil heaters energized at least 12 hours before startup
Chiller components (EXV Sensors Transducers) installed and wired properly.
*Wiring complies with National Electrical Code and local codes (See Notes)
Remote EXV wired with shielded cable
Miscellaneous
Yes
No
N/A
Initials
Unit control switches all off
Remote Evaporator / Condenser Piping factory reviewed
All refrigerant components/piping leak tested, evacuated and charged
Thermometers, wells, gauges, control, etc., installed
Minimum system load of 80% capacity available for testing/adjusting controls
Document Attached: Technical Breakdown from Selection Software
Document Attached: Final Order Acknowledgement
Document Attached: Remote piping approval
Notes: The most common problems delaying start-up and affecting unit reliability are:
1. Field installed compressor motor power supply leads too small. Questions: Contact the local Daikin sales representative*. State size, number and
type of conductors and conduits installed:
a. From Power supply to chiller
* Refer to NFPA 70-2017, Article 440.35
2. Remote Evaporator piping incomplete or incorrect. Provide approved piping diagrams.
3. Items on this list incorrectly acknowledged resulting in delayed start and possible extra expenses incurred by return trips.
Contractor Representative
Daikin Applied Sales Representative
Signed:
Signed:
Name:
Name:
Company:
Company:
Date:
Date:
Phone/Email:
Phone/Email:

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www.DaikinApplied.com 5 IOM 1206-13 • TRAILBLAZER®MODEL AGZ CHILLERS

This manual provides installation, operation, and maintenance information for Daikin Trailblazer model AGZ-E air-cooled scroll
chillers with the MicroTech® III controller and using R-410A. Packaged unit congurations and optional heat recovery installations
are covered in this manual. Information for units with either the pump package or remote evaporator options can be found at www.
DaikinApplied.com.
NOTE: Installation and maintenance are to be performed only by qualied personnel who are familiar with local codes and
regulations, and experienced with this type of equipment.

LOCKOUT/TAGOUT all power sources prior to starting, pressurizing, de-pressuring, or powering down the Chiller. Failure to follow
this warning exactly can result in serious injury or death. Be sure to read and understand the installation, operation, and service
instructions within this manual.

Electric shock hazard. Improper handling of this equipment can cause personal injury or equipment damage. This equipment must
be properly grounded. Connections to and service of the MicroTech®III control panel must be performed only by personnel that are
knowledgeable in the operation of the equipment being controlled.
CAUTION
Static sensitive components. A static discharge while handling electronic circuit boards can cause damage to the components. Use
a static strap before performing any service work. Never unplug any cables, circuit board terminal blocks, or power plugs while
power is applied to the panel.
CAUTION
When moving refrigerant to/from the chiller using an auxiliary tank, a grounding strap must be used. An electrical charge builds
when halo-carbon refrigerant travels in a rubber hose. A grounding strap must be used between the auxiliary refrigerant tank and
the chiller’s end sheet (earth ground), which will safely take the charge to the ground. Damage to sensitive electronic components
could occur if this procedure is not followed.

Escaping refrigerant can displace air and cause su󰀨ocation. Immediately evacuate and ventilate the equipment area. If the unit
is damaged, follow Environmental Protection Agency (EPA) requirements. Do not expose sparks, arcing equipment, open ame
or other ignition source to the refrigerant.

Polyolester Oil, commonly known as POE oil is a synthetic oil used in many refrigeration systems, and may be present in this Daikin
product. POE oil, if ever in contact with PVC/CPVC, will coat the inside wall of PVC/CPVC pipe causing environmental stress
fractures. Although there is no PVC/CPVC piping in this product, please keep this in mind when selecting piping materials for your
application, as system failure and property damage could result. Refer to the pipe manufacturer’s recommendations to determine
suitable applications of the pipe.


Dangers indicate a hazardous situation, which will result in death or serious injury if not avoided.

Warnings indicate potentially hazardous situations, which can result in property damage, severe personal injury, or death if not
avoided.
CAUTION
Cautions indicate potentially hazardous situations, which can result in personal injury or equipment damage if not avoided.
NOTE: Indicates important details or clarifying statements for information presented.

IOM 1206-13 • TRAILBLAZER®MODEL AGZ CHILLERS 6 www.DaikinApplied.com
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General Description
Daikin Trailblazer®air-cooled water chillers are complete, self-
contained, automatic chillers designed for outdoor installation.
Packaged units are completely assembled, factory wired,
charged, and tested.
The electrical control center includes all equipment protection
and operating controls necessary for dependable automatic
operation. Components housed in a centrally located, weather
resistant control panel with hinged and tool-locked doors.
NOMENCLATURE
A G Z XXX E D SE

Table 1: Operating Limits for AGZ-E Chillers
Maximum standby ambient temperature 130°F (54°C)
Maximum operating ambient temperature 105°F (41°C)
-with optional high ambient package (see information under High Ambient Operation) 125°F (52°C)
Minimum operating ambient temperature (standard control) 32°F (0°C)
Minimum operating ambient temperature (with optional low-ambient control) -10°F (-23°C)
Leaving chilled water temperature 40°F to 65°F (4°C to 18°C)
Leaving chilled uid temperatures (with anti-freeze) - Note that in cases of high ambient
temperature, the lowest leaving water temperature settings may be outside of the chiller
operating envelope; consult Daikin Tools to ensure chiller is capable of the required lift.
15°F to 65°F (-9°C to 18°C)
Operating chilled water delta-T range 6°F to 16°F (3.3°C to 8.9°C)
Maximum evaporator operating inlet uid temperature 81°F (27°C)
Maximum evaporator non-operating inlet uid temperature 100°F (38°C)
Nameplates
Identication nameplates on the chiller:
• The unit nameplate is located on the exterior of the Unit
Power Panel. Both the Model No. and Serial No. are
located on the unit nameplate; the Serial No. is unique to
the unit. These numbers should be used to identify the
unit for service, parts, or warranty questions. This plate
also has the unit refrigerant charge and electrical ratings.
• Evaporator data plate is under insulation and contains
the serial number.
• Compressor nameplate is located on each compressor
and gives pertinent electrical information.

Installation is to be performed by qualied personnel who are
familiar with local codes and regulations.
CAUTION
Sharp edges and coil surfaces are a potential injury hazard.
Avoid contact with them.
Inspection
Check all items carefully against the bill of lading. Inspect
all units for damage upon arrival. Report shipping damage
and le a claim with the carrier. Check the unit nameplate
before unloading, making certain it agrees with the power
supply available. Daikin Applied is not responsible for physical
damage after the unit leaves the factory.
Handling
Be careful to avoid rough handling of the unit. Do not push or
pull the unit from anything other than the base while sitting on
appropriately-sized roller dollies.
To lift the unit, 2-1/2” (64mm) diameter lifting eyes are provided
on the base of the unit. Arrange spreader bars and cables to
prevent damage to condenser coils or cabinet (see Figure 1).
CAUTION
All lifting locations must be used to prevent damage to unit.
Air-Cooled
Global Design
Scroll Compressor
Application, E󰀩ciency, Unit Type
Design Vintage
Nominal Tons # of Compressors
D = Tandem per Circuit
T = Trio per Circuit

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www.DaikinApplied.com 7 IOM 1206-13 • TRAILBLAZER®MODEL AGZ CHILLERS

Improper rigging, lifting, or moving of a unit can result in
property damage, severe personal injury or death. Follow
rigging and moving instructions carefully. Do not stand
beneath the unit while it is lifted or being installed.
Figure 1: Required Lifting Arrangement
Unit Placement
Trailblazer®units are for outdoor applications and can be
mounted either on a roof or at ground level. For roof mounted
applications, install the unit on a steel channel or I-beam frame
to support the unit above the roof. Spring isolators for roof
applications are recommended. For ground level applications,
install the unit on a substantial base that will not settle. Use a
one-piece concrete slab with footings extended below the frost
line. Be sure the foundation is level within 0.5” (13 mm) over
its length and width. The foundation must be strong enough
to support the unit weight - see “Dimensions and Weights -
Packaged Units” on page 24.
The addition of neoprene wa󰀪e pads (supplied by customer)
under the unit may allow water to drain from inside the frame,
which can act as a dam. Installation of optional spring or
rubber-in-shear isolators can also assist with drainage, see
page 39 for information.
Mounting
The inside of the base rail is open to allow access for securing
mounting bolts, etc. Mounting location dimensions are given in
Dimensional Drawings beginning on page 24.
All compressor bolts, rubber grommets, and fasteners should
be left in place on the base plate as shown in Figure 2. None
of these fasteners are considered to be ‘temporary shipping
bolts.’
Figure 2: Compresssor Base Plate Mounting
Service Clearance
The control panels are located on the end of the chiller and
require a minimum of four feet of clearance in front of the
panels. Compressors, lter-driers, and liquid line shuto󰀨 valves
are accessible on each side or end of the unit. Do not block
access to the sides or ends of the unit with piping or conduit.
These areas must be open for service access. Minimum
service clearance is as follows:
Sides
•  Minimum of 4 ft (1.2 m)
•  It is highly recommended to provide
a minimum of 8 ft (2.4 m) on one side to allow for coil
replacement. Coils can be removed from the top, allowing
a minimum of 4 ft (1.2 m) of side clearance; however, the
unit performance may be derated.
Control Panel End
• All Models: Minimum of 4 feet (1.2 meters)
Opposite Control Panel End
• Minimum of 8 ft (2.4 m) for coil removal.
•  Minimum of 8 ft (2.4 m). Clearance
may be reduced to 4 ft (1.2 m) if side clearance is
su󰀩cient for evaporator service and removal.
Figure 3: Service Clearance
NOTE: Number
of fans and
rigging holes may
vary from this
diagram.
The lifting
method will
remain the same.
Minimum = 4 ft (1.2 m)
Minimum = 4 ft (1.2 m)
Minimum = 4 ft
(1.2 m)
Minimum = 8 ft (2.4 m)
for 4 Fan Models
Control Panel
Minimum = 4 ft (1.2 m)
for 6-14 Fan Models
if other clearance
requirements are met
6-14 Fan Models: 8ft (2.4 m) recommended
on one side for coil removal

IOM 1206-13 • TRAILBLAZER®MODEL AGZ CHILLERS 8 www.DaikinApplied.com
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
Su󰀩cient clearance must be maintained between the unit
and adjacent walls or other units to allow the required unit air
ow to reach the coils. Failure to do so will result in a capacity
reduction and an increase in power consumption. No solid
obstructions are allowed above the unit at any height, see page
10 for details.
The clearance requirements shown are a general guideline
and cannot account for all scenarios. Such factors as prevailing
winds, additional equipment within the space, design outdoor
air temperature, and numerous other factors may require more
clearance than what is shown. Additional clearances may be
required under certain circumstances.
Graphs on the following pages give the minimum clearance for
di󰀨erent types of installations and also capacity reduction and
power increase if closer spacing is used. The graphs are based
on individual cases and should not be combined with other
scenarios.
CAUTION
Unit performance may be impacted if the operational
clearance is not su󰀩cient.
Case 1: Building or Wall on One Side of Unit
NOTE: Assumes a solid height wall taller than unit. Refer to
Case 4 for partial wall openings.
For models AGZ030-101E, maintain a 4 feet minimum from a
wall of any height.
For models AGZ110-130E, maintain a 6 feet minimum from a
wall of any height.
For models AGZ140-241E, maintain a 8 feet minimum from a
wall of any height.
Figure 4: Building or Wall on One Side of Unit
Case 2: Two Units, Side-by-Side
For models 030-180, there must be a minimum of 4 feet
between two units placed side-by-side; however, performance
may be a󰀨ected at this distance. For models 191-241,
the minimum is 6 feet as closing spacing may cause air
recirculation and elevated condenser pressure. Assuming
the requirement of one side having at least 8 feet of
service clearance is met, Case 2 gures show performance
adjustments as the distance between two units increases.
Figure 5: Two Units, Side-by-Side
Figure 6: Case 2 - Full Load Capacity Reduction
Figure 7: Case 2 - Power Increase
Height
of
Wall
Distance
Between
Wall
and
Unit
D
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4568



AGZ030-070E AGZ075-101E
AGZ110-130E AGZ140-180E
AGZ191-211E AGZ226-241E
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
4568
% Power Increase

Power Increase
AGZ030-070E AGZ075-101E
AGZ110-130E AGZ140-180E
AGZ191-211E AGZ226-241E

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www.DaikinApplied.com 9 IOM 1206-13 • TRAILBLAZER®MODEL AGZ CHILLERS
Case 3: Three or More Units, Side-by-Side
For all models, there must be a minimum distance between
any units placed side-by-side; however, performance may be
a󰀨ected at this distance. Minimum distances are: models 030
to 070 - 4 feet, models 075 to 101 - 5 feet, models 110 to 241
- 6 feet. Figure 9 and Figure 10 depict Case 3 performance
adjustments as the distance between units increases.
NOTE: Data in Figure 9 and Figure 10 is for the middle unit
with a unit on each side. See Case 2 adjustment
factors for the two outside units.
Figure 8: Three or More Units, Side-by-Side
Figure 9: Case 3 - Full Load Capacity Reduction
Figure 10: Case 3 - Power Increase
Case 4: Open Screening Walls
Decorative screening walls are often used to help conceal a
unit either on grade or on a rooftop. When possible, design
these walls such that the combination of their open area
and distance from the unit (see Figure 11) do not require
performance adjustment. If the wall opening percentage is less
than recommended for the distance to the unit, it should be
considered as a solid wall. It is assumed that the wall height is
equal to or less than the unit height when mounted on its base
support. If the wall height is greater than the unit height, see
Case 5: Pit Installation for performance adjustment factors.
The distance from the sides of the unit to the side walls must
be su󰀩cient for service, such as opening control panel doors.
For uneven wall spacing, the distance from the unit to each
wall can be averaged providing no distance is less than 4 feet.
Values are based on walls on all four sides.
Figure 11: Case 4 - Allowable Wall Open Area
0.0
1.0
2.0
3.0
4.0
5.0
6.0
4568

Distance Between Units

AGZ030-035E AGZ040-070E AGZ075-101E
AGZ0110-130E AGZ140-180E AGZ191-211E
AGZ226-241E
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
4568
% Power Increase

Power Increase
AGZ030-035E AGZ040-070E AGZ075-101E
AGZ0110-130E AGZ140-180E AGZ191-211E
AGZ226-241E
3.0
4.0
5.0
6.0
7.0
8.0
9.0
010 20 30 40 50

% Open Wall Area

AGZ030-070E AGZ075-101E
AGZ110-130E AGZ140-180E
AGZ191-241E

IOM 1206-13 • TRAILBLAZER®MODEL AGZ CHILLERS 10 www.DaikinApplied.com

Case 5: Pit Installation
Pit installations can cause operating problems resulting from
air recirculation and restriction and require care that su󰀩cient
air clearance is provided, safety requirements are met and
service access is provided. A solid wall surrounding a unit is
substantially a pit and this data should be used.
Steel grating is sometimes used to cover a pit to prevent
accidental falls or trips into the pit. The grating material
and installation design must be strong enough to prevent
such accidents, yet provide abundant open area to avoid
recirculation problems. Have any pit installation reviewed by
the Daikin Applied sales representative prior to installation to
ensure it has su󰀩cient air-ow characteristics and approved by
the installation design engineer to avoid risk of accident.
Models AGZ030-070E:
The Case 5 gures for models AGZ030-070E show adjustment
factors for pit/wall heights of 4 feet, 5 feet, and 6 feet.
Figure 12: Case 5 - Full Load Capacity Reduction
(AGZ030E-070E)
Figure 13: Case 5 - Power Increase (AGZ030-070E)
Figure 14: Case 5 - Pit Installation
Models AGZ075-130E:
The Case 5 gures for models AGZ075-130E show adjustment
factors for pit/wall heights of 5 feet, 6 feet, and 8 feet.
Figure 15: Case 5 - Full Load Capacity Reduction
(AGZ075-130E)
Figure 16: Case 5 - Power Increase (AGZ075-130E)
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0 8 10 12 13 14


-070E)
Dis tance = 4 f t Dis tance = 5 f t Dis tance = 6 f t
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
0 8 10 12 13 14
% Power Increase

Power Increase (AGZ030-070E)
Dis tance = 4 f t Dis tance = 5 f t Dis tance = 6 f t
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0 8 10 12 13 14


-130E)
Dis tance = 5 f t Distance = 6 f t D ist ance = 8 f t
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
0 8 10 12 13 14
% Power Increase

Power Increase (AGZ075-130E)
Dis tance = 5 f t Dis tance = 6 f t Dis tance = 8 f t


www.DaikinApplied.com 11 IOM 1206-13 • TRAILBLAZER®MODEL AGZ CHILLERS
Models AGZ140-241E:
The Case 5 gures for models AGZ140-241E show adjustment
factors for pit/wall heights of 6 feet, 8 feet, and 10 feet.
Figure 17: Case 5 - Full Load Capacity Reduction
(AGZ140-180E)
Figure 18: Case 5 - Full Load Capacity Reduction
(AGZ191-241E)
Figure 19: Case 5 - Power Increase
(AGZ140-211E)
Figure 20: Case 5 - Power Increase
(AGZ226-241E)
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0 8 10 12 13 14


-180E)
Distance = 6 ft Distance = 8 ft Distance = 10 ft
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
0 8 10 12 13 14


-241E)
Distance = 6 ft Distance = 8 ft Distance = 10 ft
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
0 8 10 12 13 14
% Power Increase

Power Increase (AGZ140-211E)
Dis tance = 6 f t Dis tance = 8 f t Dis tance = 10 f t
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
0 8 10 12 13 14
% Power Increase

Power Increase (AGZ226-241E)
Distance = 6 ft Distance = 8 ft Distance = 10 ft

IOM 1206-13 • TRAILBLAZER®MODEL AGZ CHILLERS 12 www.DaikinApplied.com

Chilled Water Piping
CAUTION
To prevent damage to the evaporator and potential chiller
failure, a supply strainer is required in the inlet water piping
which connects to this evaporator. This strainer must be
installed prior to operation of the chilled liquid pumps.
Field installed water piping to the chiller must include:
• A cleanable strainer installed at the water inlet to the
evaporator to remove debris and impurities before they
reach the evaporator. Install cleanable strainer within
5 feet (1500 mm) of pipe length from the evaporator
inlet connection and downstream of any welded
connections (no welded connections between strainer to
evaporator). AGZ-E models 030-241 require a strainer
with perforations no larger than 0.063” (1.6 mm) diameter.
See the Inlet Strainer Guidelines on page 13 for more
information.
• A water ow switch must be installed in the horizontal
piping of the supply (evaporator outlet) water line to avoid
evaporator freeze-up under low or no ow conditions. The
ow switch may be ordered as a factory-installed option,
a eld-installed kit, or may be supplied and installed in the
eld. See page 15 for more information.
• Piping for units with brazed-plate evaporators must have
a drain and vent connection provided in the bottom of
the lower connection pipe and to the top of the upper
connection pipe respectively, see Figure 21. These
evaporators do not have drain or vent connections due
to their construction. Purge air from the water system
before unit start-up to provide adequate ow through the
evaporator.
• Adequate piping support, separate from the unit,
to eliminate weight and strain on the ttings and
connections.
• An expansion tank and regulating valve to maintain water
pressure.
• matching mechanical connections. All evaporators have
OGS-type grooved water connections (adhering to
Standard AWWA C606) or optional ange connections.
PVC piping should not be used.

Polyolester Oil, commonly known as POE oil is a synthetic
oil used in many refrigeration systems, and is present in this
Daikin product. POE oil, if ever in contact with PVC/CPVC, will
coat the inside wall of PVC/CPVC pipe causing environmental
stress fractures. Although there is no PVC/CPVC piping in
this product, please keep this in mind when selecting piping
materials for your application, as system failure and property
damage could result. Refer to the pipe manufacturer’s
recommendations to determine suitable applications of the
pipe.
It is recommended that the eld installed water piping to the
chiller include:
• Temperature sensors at the inlet and outlet connections
of the evaporator.
• Water pressure gauge connection taps and gauges at
the inlet and outlet connections of the evaporator for
measuring water pressure drop.
• Shuto󰀨 valves to isolate the unit from the piping during
unit servicing.
• Minimum bends and changes in elevation to minimize
pressure drop.
• Vibration eliminators in both the supply and return water
lines to reduce transmissions to the building.
• Flush the system water piping thoroughly before making
connections to the unit evaporator.
• Piping insulation, including a vapor barrier, helps prevent
condensation and reduces heat loss.
• Regular water analysis and chemical water treatment
for the evaporator loop is recommended immediately at
equipment start-up.
NOTE: Failure to follow these measures may result in
performance and reliability issues.
Figure 21: Typical Piping for Brazed-Plate Evaporator, Models 30-241
Air
Vent
Flow
Switch
Vibration
Eliminators
Drain
Outlet
Inlet
P
Isolation
Valves
Strainer
WELDED PIPE CONNECTIONS ARE NOT ALLOWED
BETWEEN THE STRAINER AND EVAPORATOR DUE
TO THE CHANCE OF SLAG ENTERING THE EVAPORATOR


www.DaikinApplied.com 13 IOM 1206-13 • TRAILBLAZER®MODEL AGZ CHILLERS
Inlet Strainer Guidelines
An inlet water strainer kit must be installed in the chilled water
piping before the evaporator inlet. Several paths are available
to meet this requirement:
1. Factory installed option is available - models 030 to 241.
2. A eld-installed kit shipped-loose with the unit is available
for all unit sizes and consists of:
• Y-type area strainer with 304 stainless steel perforated
basket, grooved pipe connections and strainer cap [a
strainer with perforations as listed below by model.]
• Extension pipe with two Schrader ttings that can be
used for a pressure gauge and thermal dispersion ow
switch. The pipe provides su󰀩cient clearance from the
evaporator for strainer basket removal.
• ½-inch blowdown valve
• Two grooved clamps
Both are sized per Table 2 and with the pressure drop shown in
the Strainer Pressure Drop graph. Connection sizes are given
in the Dimensions and Weights section on page 24.
3. A eld-supplied strainer that meets specication and
installation requirements of this manual.
Verify total system water pressure drop including the strainer
and the chiller using Figure 22 and Figure 50.
Table 2: Strainer Data
Trailblazer®
Model
Strainer Size
in (mm)
Maximum

in (mm)

Installed
Option

Installed
Option
030-070E 2.5 (64) 0.063 (1.6) Y Y
075-130E 3.0 (76) 0.063 (1.6) Y Y
140-180E 4.0 (102) 0.063 (1.6) Y Y
 6.0 (152) 0.063 (1.6) Y Y
Figure 22: Strainer Pressure Drop (Data on page 46)
Figure 23: Factory Installed Strainer

Constant Evaporator Flow
The evaporator ow rates and pressure drops shown on page
44 for various system designs. The maximum ow rate and
pressure drop are based on a 6°F temperature drop. Flow
rates above the maximum values will result in unacceptable
pressure drops and can cause excessive erosion, potentially
leading to failure.
The minimum ow and pressure drop is based on a full load
evaporator temperature drop of 16°F. Evaporator ow rates
below the minimum values can result in laminar ow causing
low pressure alarms, scaling and poor temperature control.
Variable Evaporator Flow
Reducing evaporator ow in proportion to load can reduce
system power consumption. The rate of ow change should
be a maximum of 10 percent of the ow per minute. For
example, if the maximum design ow is 200 gpm and it will be
reduced to a ow of 140 gpm, the change in ow is 60 gpm.
Ten percent of 200 gpm equals 20 gpm change per minute, or
a minimum of three minutes to go from maximum to desired
ow. The water ow through the evaporator must remain
between the minimum and maximum values listed in Table
11 on page 44. If ow drops below the minimum allowable,
large reductions in heat transfer can occur. If the ow exceeds
the maximum rate, excessive pressure drop and tube erosion
can occur. See Variable Evaporator Flow on page 70 for set
point information.

All chilled water systems need adequate time to recognize
a load change, respond to the change and stabilize to avoid
undesirable short cycling of the compressors or loss of
temperature control. In air conditioning systems, the potential
for short cycling usually exists when the building load falls
below the minimum chiller plant capacity or on close-coupled
systems with very small water volumes. Some of the things
the designer should consider when looking at water volume
are the minimum cooling load, the minimum chiller plant
capacity during the low load period and the desired cycle time
for the compressors. Assuming that there are no sudden load
2.5 in 3.0 in
4.0 in
8.0 in.
6.0 in.
2.0 in.
0.1
1.0
10.0
100.0
10.0 100.0 1000.0



IOM 1206-13 • TRAILBLAZER®MODEL AGZ CHILLERS 14 www.DaikinApplied.com

changes and that the chiller plant has reasonable turndown,
a rule of thumb of “gallons of water volume equal to two to
three times the chilled water gpm ow rate” is often used. A
storage tank may have to be added to the system to reach the
recommended system volume. Refer to AG 31-003 for method
of calculating “Minimum Chilled Water Volume”.
The water quality provided by the owner/occupant/operator/
user to a chiller system should minimize corrosion, scale
buildup, erosion, and biological growth for optimum e󰀩ciency
of HVAC equipment without creating a hazard to operating
personnel or the environment. Strainers must be used to
protect the chiller systems from water-borne debris. Daikin will
not be responsible for any water-borne debris damage or water
side damage to the chiller heat exchangers due to improperly
treated water.
Water systems should be cleaned and ushed prior to chiller
installation. Water testing and treatment should be veried
during initial chiller installation/commissioning and maintained
on a continuous basis by water treatment professionals (see
Limited Product Warranty).
CAUTION
The improper use of detergents, chemicals, and additives
in the chiller system water may adversely a󰀨ect chiller
performance and potentially lead to repair costs not covered
by warranty. Any decision to use these products is at the
discretion of the owner/occupant/operator/user as such they
assume full liability/responsibility for any damage that may
occur due to their use.

Evaporator freeze-up can be a concern in the application of
air-cooled water chillers in areas experiencing below freezing
temperatures. To protect against freeze-up, insulation and an
electric heater are furnished with the evaporator. Models 030
to 241 have an external plate heater and thermostat. These
heaters help protect the evaporator down to -20°F (-29°C)
ambient air temperature. The evaporator heater cable is factory
wired to the 115 volt control circuit transformer in the control
box. A 115V power source for the heater and controls may
also be supplied from a separate power feed to maximize unit
protection if desired. Refer to the eld wiring diagram on page
48 for additional information on supplying a separate 115V
power feed.
Operation of the heaters is automatic through the sensing
thermostat that energizes the evaporator heaters for protection
against freeze-up. Unless the evaporator is drained in the
winter or contains an adequate concentration of anti-freeze, the
disconnect switch to the evaporator heater must not be open.
Although the evaporator is equipped with freeze protection,
it does not protect water piping external to the unit or the
evaporator itself if there is a power failure or heater burnout, or
if the chiller is unable to control the chilled water pumps. Use
one of the following recommendations for additional freeze
protection:
1. If the unit will not be operated during the winter, drain the
evaporator and chilled water piping and ush with glycol.
2. Add a glycol solution to the chilled water system. Burst
protection should be approximately 10°F below minimum
design ambient temperature.
3. Insulate the exposed piping.
4. Add thermostatically controlled heat by wrapping the
lines with heat tape.
5. When glycol is added to the water system for freeze
protection, the refrigerant suction pressure will be lower,
cooling performance less, and water side pressure drop
greater. See “” on page 15 for ow rate and pressure
drop adjustment factors.
Chilled Water Pump
It is important that the chilled water pumps be wired to, and
controlled by, the chiller’s microprocessor. When equipped
with optional dual pump output, the chiller controller has the
capability to selectively send the signal to a pump relay (by
others) to start pump A or B or automatically alternate pump
selection and also has standby operation capability. The
controller will energize the pump whenever at least one circuit
on the chiller is enabled to run, whether there is a call for
cooling or not. This helps ensure proper unit start-up sequence.
The pump will also be turned on when the water temperature
goes below the Freeze Setpoint for longer than a specied time
to help prevent evaporator freeze-up. Connection points are
shown in the Field Wiring Diagram beginning on page 48.
CAUTION
Adding glycol or draining the system is the recommended
method of freeze protection. If the chiller does not have
the ability to control the pumps and the water system is not
drained or does not have adequate glycol in temperatures
below freezing, catastrophic evaporator failure may occur.
Failure to allow pump control by the chiller may cause the
following problems:
1. If the chiller attempts to start without rst starting the
pump, the chiller will lock out on the No Flow alarm and
require manual reset.
2. If the chiller evaporator water temperature drops below
the “Freeze setpoint” the chiller will attempt to start the
water pumps to avoid evaporator freeze. If the chiller
does not have the ability to start the pumps, the chiller
will alarm due to lack of water ow.
3. If the chiller does not have the ability to control the
pumps and the water system is not to be drained in
temperatures below freezing or contain glycol, the chiller
may be subject to catastrophic evaporator failure due to
freezing. The freeze rating of the evaporator is based on
the evaporator heater and pump operation. The external
brazed plate heater itself may not be able to properly
protect the evaporator from freezing without circulation
of water.


www.DaikinApplied.com 15 IOM 1206-13 • TRAILBLAZER®MODEL AGZ CHILLERS

All chillers require a chilled water ow switch to check that
there is adequate water ow through the evaporator and to
shut the unit down if necessary to avoid evaporator freeze-up
under low or no ow conditions. A factory-included thermal
dispersion ow switch will be installed on packaged models.
On remote evaporator models, the ow switch may be
separately eld-provided, or optionally shipped loose for eld
installation. Terminals are provided in the unit control center for
eld mounting and wiring of the water ow switch. Wire from
switch terminals Y and R to the unit control panel terminals
shown on the eld wiring diagrams, page 48 to page 51.
Mount the ow switch in the leaving water line to shut down
the unit when water ow is interrupted. A ow switch is an
equipment protection control and should never be used to
cycle a unit.
Installation should be per manufacturer’s instructions included
with the switch. Flow switches should be calibrated to shut o󰀨
the unit when operated below the minimum listed ow rate for
the unit as listed on page 44. Flow switch installation and
calibration is further discussed on page 104.
There is also a set of paddle switch contacts on the switch that
can be used for an indicator light or an alarm to indicate when
a “no ow” condition exists. Freeze protect any ow switch that
is installed outdoors. Di󰀨erential pressure switches are not
recommended for outdoor installation. They can freeze and not
indicate a no-ow conditions.

The use of glycol may impact system performance depending
on its concentration and should be considered during initial
system design. When glycol is added to the chilled water
system for freeze protection, recognize that the refrigerant
suction pressure will be lower, cooling performance less,
and water side pressure drop will be higher. The reduction
in performance depends upon the glycol concentration and
temperature.
Test coolant with a clean, accurate glycol refractometer to
determine the freezing point.
CAUTION
The installed glycol level must align with the rated glycol
percentage indicated on the submitted chiller technical data
sheet. Failure to adhere to the rated glycol percentage may
result in unit damage and loss of unit warranty.
CAUTION
Do not use an automotive-grade antifreeze. Industrial
grade glycols must be used. Automotive antifreeze contains
inhibitors which will cause plating on the copper tubes within
the chiller evaporator. The type and handling of glycol used
must be consistent with local codes.
Low Ambient Operation
Compressor staging is adaptively determined by system load,
ambient air temperature, and other inputs to the MicroTech®III
control. The standard minimum ambient temperature is 32°F
(0°C). A low ambient option with fan VFD allows operation
down to -10°F (-23°C). The minimum ambient temperature
is based on still conditions where the wind is not greater
than 5 mph. Greater wind velocities will result in reduced
discharge pressure, increasing the minimum operating
ambient temperature. Field installed louvers are available and
recommended to help allow the chiller to operate e󰀨ectively
down to the ambient temperature for which it was designed.
High Ambient Operation
Trailblazer™units for high ambient operation (105°F to 125°F,
40°C to 52°C) require the addition of the optional high ambient
package that includes a small fan with a lter in the air intake
to cool the control panel. All units with the optional VFD low
ambient fan control automatically include the high ambient
option. Note that in cases of high ambient temperature,
capacity could be reduced or the lowest leaving water
temperature settings may be outside of the chiller operating
envelope; consult with a Daikin Applied sales representative to
ensure chiller is capable of the required lift.

IOM 1206-13 • TRAILBLAZER®MODEL AGZ CHILLERS 16 www.DaikinApplied.com
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
Partial heat recovery for Trailblazer®chillers is achieved by
adding an auxiliary heat exchanger in each unit refrigerant
circuit between the compressors and the condenser coils.
The heat exchangers transfer the heat from the compressor
discharge gas to a separate water loop which can be used
for various heating applications. The heating recovery cycle
is only available when the chiller is running. The partial
heat recovery auxiliary heat exchanger can return water up
to 155°F; however, this value cannot be set. The amount
of heat produced can be up to 50% of the nominal cooling
capacity and is dependent on the requested cooling load, the
operating temperatures, and the water ow rate through the
auxiliary heat exchangers. Contact a local Daikin Applied sales
representative for information on specic applications.

Potable water cannot be used in the partial heat recovery
system due to the single wall construction of the heat
exchangers.
Partial heat recovery components that are factory-supplied:
• Brazed plate heat exchangers - one in each circuit with
the water piped together in parallel for one inlet and one
outlet water connection, see Figure 51 for pressure drops.
• Insulation of heat exchangers and water piping at the unit.
• Separate temperature sensors for inlet and outlet water
piping at the heat exchangers.
• Connections for air vent at the outlet water piping and
drain at the inlet water piping.
• Immersion heater for each auxiliary heat exchanger for
freeze protection.
 partial heat recovery eld piping (see next page) and
connections are listed below.
• an external 3-way valve or a variable speed pump in the
auxiliary heat exchanger water piping for modulation of
ow through the heat exchangers by the unit controller.
Heat recovery water loop pump must also be controlled
by the chiller controller.
• a cleanable strainer with perforations no larger than
0.063” (1.6 mm) diameter must be installed within 5 feet
(1500 mm) of pipe length from the heat exchanger inlet
and downstream of any welded connections, see Figure
22 for pressure drop.
• water piping and other portions of the heat recovery water
loop must be insulated to prevent heat loss and possible
injury due to hot surfaces.
• separate 120 volt power supply for immersion heaters. A
junction box for a 120 Volt power connection is provided.
NOTE: If the partial heat exchanger is drained, the heater
must be turned o󰀨 to avoid damaging the heat
exchanger. The heater should only be on when the
heat recovery heat exchanger has water in it.
It is recommended that the eld installed heat recovery water
piping include:
• a eld-installed safety or relief valve and expansion
tank on the water side to prevent risks in case the water
temperature thermostat should fail.
• a water tank and an additional water heater in the heat
recovery piping loop for initial water temperature control
and better loop stability. Typical loop sizing guidance
is water volume (in gallons) be greater than or equal to
approximately two to three times the heat recovery water
ow rate (in gallons/minute).
Partial Heat Recovery Freeze Avoidance
The heat recovery condenser is insulated; a factory-installed
heater will protect the heat exchanger from freezing in
ambient temperatures down to -20°F (-29°C). When the
ambient temperature drops to approximately 39°F (3.9°C) the
thermostat energizes the heaters. The inlet and outlet piping
should be protected against freezing by one of the following
methods:
• Install heat tape on all eld-installed water piping
• Add freeze-inhibiting uid to the partial heat recovery
water loop. If adequate amounts of glycol are supplied, it
is not required to power the heater.

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www.DaikinApplied.com 17 IOM 1206-13 • TRAILBLAZER®MODEL AGZ CHILLERS
Figure 24: AGZ075-241E Heat Recovery Field Piping
Condenser Coil Options and Coating
Considerations
The standard coils on the Trailblazer™chiller are an all
aluminum alloy microchannel design with a series of at
tubes containing multiple, parallel ow microchannels layered
between the refrigerant manifolds. The microchannel coils are
designed to withstand 1000+ hour acidied synthetic sea water
fog (SWAAT) test (ASTM G85-02) at 120°F (49°C) with 0% n
loss and develop no leaks.
Figure 25: Epoxy Coil Coating
is a water-based extremely exible and durable
polymer coating uniformly applied to all coil surfaces through
a multi-step, submerged electrostatic coating process. Epoxy
coated coils provide a 10,000+ hour salt spray resistance per
ASTM B117-90, applied to both the coil and the coil headers.
The epoxy coated coils also receive a UV-resistant urethane
top-coat to provide superior resistance to degradation from
direct sunlight. This coil coating option provides the best overall
protection against corrosive marine, industrial or combined
atmospheric contamination to provide extended longevity.
Table 3: Coil/Coating Selection Matrix
Coil Option Non-
Corrosive1
Unpolluted
Marine2Industrial3Combined
Marine-
Industrial4
Standard
Microchannel +++ - - -
Epoxy
Coated Coils +++ +++ +++ ++
NOTE: 1. Non-corrosive environments may be estimated by the
appearance of existing equipment in the immediate area
where the chiller is to be placed.
2. Marine environments should take into consideration
proximity to the shore as well as prevailing wind direction.
3. Industrial contaminants may be general or localized,
based on the immediate source of contamination (i.e. diesel
fumes due to proximity to a loading dock).
4. Combined marine-industrial are inuenced by proximity
to shore, prevailing winds, general and local sources of
contamination.
BACK END OF UNIT
ELECTRONIC
3-WAY VALVE
THERMOMETER
(USER OPTION)
HEAT
RECOVERY
HEAT LOAD
SHUT OFF SHUT OFF
FIELD INSTALLED
WATER PUMP
TEE
CONNECTION
1,2
1,2
TEE CONNECTION & ELECTRONIC 3-WAY VALVE
ARE NOT REQUIRED WHEN USING A VFD
CONTROLLED WATER PUMP
FIELD
CONNECTIONS
5
INLET WATER
STRAINER
NOTES:
A VFD CONTROLLED WATER PUMP OR AN ELECTRONIC 3-WAY VALVE IS REQUIRED AND MUST BE CONTROLLED BY THE CHILLER. 1.
FIELD INSTALLED 3-WAY VALVE OR WATER PUMP VFD TO BE CONTROLLED BY 0-10 DCV OR 4-20 mA OUTPUT FROM 2.
THE CHILLER UNIT CONTROLLER.
GALLONS OF WATER VOLUME FOR THE HEAT RECOVERY PIPING LOOP SHOULD EQUAL 2 TO 3 TIMES THE 3.
HEAT RECOVERY LOOP GPM FLOW RATE.
FOR POTABLE WATER USE - A SECONDARY HEAT EXCHANGER IN A SEPARATE LOOP IS REQUIRED. 4.
WATER PIPING CONNECTIONS AT THE UNIT ARE 2.0" VICTAULIC. 5.
AGZ075-241E PACKAGE CHILLER
WITH HEAT RECOVERY
MICROCHANNEL ALUMINUM COIL
*FIELD INSTALLED HEAT RECOVERY LOOP
VIBRATION
ELIMINATOR
VIBRATION
ELIMINATOR
TERMINAL BOX FOR FIELD WIRING TO HEAT
EXCHANGER FREEZE PROTECTION HEATERS
0B
334549813

IOM 1206-13 • TRAILBLAZER®MODEL AGZ CHILLERS 18 www.DaikinApplied.com


Figure 26: AGZ030-070E Package Chiller with Microchannel
UNIT HAS TWO INDEPENDENT SYSTEMS. PIPING SHOWN FOR ONE SYSTEM OF UNIT.
MICROCHANNEL ALUMINUM COIL
NOTE:
AGZ030-070E PACKAGE CHILLER
CHARGING
VALVE
LIQUID
TUBING
LIQUID
SHUT-OFF
VALVE
(OPTIONAL)
FILTER
DRIER
(REPLACEABLE
CORE OR SEALED)
SOLENOID
VALVE
SIGHT
GLASS THERMAL
EXPANSION VALVE
(EXV – OPTIONAL)
SUCTION SHUT-OFF
BALL VALVE
(OPTIONAL)
SUCTION
TUBING
SCHRADER
VALVE
DISCHARGE
TUBING
AIR
FLOW
AIR
FLOW
AIR
FLOW
CONDENSER
ASSEMBLY
SCROLL
COMPRESSOR
(TANDEM)
CHARGING
VALVE
SCHRADER
VALVE
SUCTION
TEMP. SENSOR
(ST1, ST2)
SUCTION
TRANSDUCER
(WL1, WL2)
DISCHARGE
TRANSDUCER
(WH1, WH2)
SCHRADER
VALVE
SCHRADER
VALVE
HOT GAS
BYPASS TUBING
(OPTIONAL)
HGBP
VALVE
SOLENOID
VALVE
ACCESS
FITTING
DISCHARGE
SHUT-OFF
VALVE
(OPTIONAL)
DISCHARGE
HIGH PRESSURE
SWITCH
SCHRADER
VALVE
FUSIBLE
PLUG
WATER
IN
WATER
OUT
PLATE TYPE
EVAPORATOR
LEAVING WATER
TEMP. SENSOR
FLOW SENSOR
(OPTIONAL)
WYE STRAINER REQUIRED
(FACTORY OR FIELD
INSTALLED)
OIL SIGHT
GLASS
OIL
HEATER
EXPANSION VALVE
SENSING BULB
OUTSIDE AIR
TEMPERATURE
(WAA)
LOCATED BEHIND
THE CONTROL BOX


www.DaikinApplied.com 19 IOM 1206-13 • TRAILBLAZER®MODEL AGZ CHILLERS
Figure 27: AGZ075-101E Package Chiller with Microchannel
334549802
0D
NOTE: PIPING SHOWN FOR ONE SYSTEM OF UNIT. UNITS HAVE TWO INDEPENDENT SYSTEMS.
AGZ075-101E PACKAGE CHILLER
MICROCHANNEL ALUMINUM COIL
CHARGING
VALVE
LIQUID
TUBING
LIQUID
SHUT-OFF
VALVE
FILTER
DRIER
(REPLACEABLE CORE)
SOLENOID
VALVE
SIGHT
GLASS
ELECTRICAL
EXPANSION VALVE
SUCTION
TUBING
DISCHARGE
TUBING
AIR
FLOW
AIR
FLOW
CONDENSER
ASSEMBLY
SCROLL
COMPRESSOR
(TANDEM)
CHARGING
VALVE
SUCTION
TEMP. SENSOR
(ST1, ST2)
SUCTION
TRANSDUCER
(WL1, WL2)
DISCHARGE
TRANSDUCER
(WH1, WH2)
SCHRADER
VALVE
SCHRADER
VALVE
HOT GAS
BYPASS TUBING
(OPTIONAL)
HGBP
VALVE
SOLENOID
VALVE
ACCESS
FITTING
DISCHARGE
SHUT-OFF VALVE
WITH SCHRADER
VALVE
SCHRADER
VALVE
SCHRADER
VALVE
FUSIBLE
PLUG
WATER
IN
WATER
OUT
PLATE TYPE
EVAPORATOR
LEAVING WATER
TEMP. SENSOR
FLOW SENSOR
(OPTIONAL)
WYE STRAINER REQUIRED
(FACTORY OR FIELD
INSTALLED)
OIL SIGHT
GLASS
OIL
HEATER
OUTSIDE AIR
TEMPERATURE
(WAA)
LOCATED ON
CONDENSER RAIL
HOTGAS
SHUT-OFF
VALVE
AIR
FLOW
SCHRADER
VALVE
AIR
FLOW
LIQUID LINE
CHECK VALVE
DISCHARGE HIGH
PRESSURE SWITCH
(AGZ075E CIR. 1 AND
AGZ080-100E CIR. 1 & 2)
SUCTION SHUT-OFF
BALL VALVE WITH
SCHRADER VALVE
(OPTION)
DISCHARGE
SOLENOID
VALVE
ENTERING WATER
TEMPERATURE
SENSOR
DISCHARGE HIGH
PRESSURE SWITCH
(AGZ075E CIR. 2
ONLY)

IOM 1206-13 • TRAILBLAZER®MODEL AGZ CHILLERS 20 www.DaikinApplied.com

Figure 28: AGZ110-130E Package Chiller with Microchannel
AGZ110-130E PACKAGE CHILLER
MICROCHANNEL ALUMINUM COIL
NOTE: PIPING SHOWN FOR ONE SYSTEM OF UNIT. UNITS HAVE TWO INDEPENDENT SYSTEMS.
CHARGING
VALVE
LIQUID
TUBING
LIQUID
SHUT-OFF
VALVE
FILTER
DRIER
(REPLACEABLE CORE)
SOLENOID
VALVE
SIGHT
GLASS
ELECTRICAL
EXPANSION VALVE
SUCTION
TUBING
DISCHARGE
TUBING
AIR
FLOW
AIR
FLOW
CONDENSER
ASSEMBLY
SCROLL
COMPRESSOR
(TANDEM)
CHARGING
VALVE
SUCTION
TEMP. SENSOR
(ST1, ST2)
SUCTION
TRANSDUCER
(WL1, WL2)
DISCHARGE
TRANSDUCER
(WH1, WH2)
SCHRADER
VALVE
SCHRADER
VALVE
HOT GAS
BYPASS TUBING
(OPTIONAL)
HGBP
VALVE
SOLENOID
VALVE
ACCESS
FITTING
DISCHARGE
SHUT-OFF VALVE
WITH SCHRADER
VALVE
SCHRADER
VALVE
SCHRADER
VALVE
FUSIBLE
PLUG
WATER
IN
WATER
OUT
PLATE TYPE
EVAPORATOR
LEAVING WATER
TEMP. SENSOR
FLOW SENSOR
(OPTIONAL)
WYE STRAINER REQUIRED
(FACTORY OR FIELD
INSTALLED)
OIL SIGHT
GLASS
OIL
HEATER
OUTSIDE AIR
TEMPERATURE
(WAA)
LOCATED ON
CONDENSER RAIL
HOTGAS
SHUT-OFF
VALVE
AIR
FLOW
SCHRADER
VALVE
AIR
FLOW
DISCHARGE
HIGH PRESSURE
SWITCH
SUCTION SHUT-OFF
BALL VALVE WITH
SCHRADER VALVE
(OPTION)
LIQUID LINE
CHECK VALVE
DISCHARGE
SOLENOID
VALVE
ENTERING WATER
TEMPERATURE
SENSOR
334549802
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