Daikin IOM 1062 General instructions

Installation, Operation, and Maintenance Manual IOM 1062
Group: Chiller
Part Number: 331375001
Effective: January 2010
Supersedes: IOM AFSD-2
Direct Drive Fluid Coolers
Type AFS 005 through AFS 107
Type AFD 046 through AFD 212

2Direct Drive Fluid Coolers IOM 1062
Table of Contents
Product Offering ........................................................................................................4
Introduction................................................................................................................5
Installation ..................................................................................................................5
Unit Location .....................................................................................................................................6
Holding Charge ..................................................................................................................................6
Sound Vibration .................................................................................................................................7
Walls or Obstructions .........................................................................................................................7
Multiple Units ....................................................................................................................................7
Units in Pits........................................................................................................................................7
Decorative Fences ..............................................................................................................................7
General...............................................................................................................................................8
Piping Installation ..............................................................................................................................8
Glycol Charge ..................................................................................................................................10
Mixing Glycol and Water .................................................................................................................10
Glycol Sludge Prevention.................................................................................................................10
Fluid Circulating Pump ....................................................................................................................10
Ambient Conditions .........................................................................................................................11
Physical Data ............................................................................................................11
Dimensional Data .....................................................................................................13
Electrical Data..........................................................................................................15
Electrical Wiring ..............................................................................................................................15
Wiring Diagrams ..............................................................................................................................18
Start Up .....................................................................................................................19
Prestart .............................................................................................................................................19
Filling and Purging the System.........................................................................................................19
Temperature Control ........................................................................................................................19
Maintenance .............................................................................................................30
Cleaning Instructions........................................................................................................................30
Manufactured in an ISO certified facility
©2010 Daikin. Illustrations and data cover the Daikin product at the time of
publication and we reserve the right to make changes in design and construction at
anytime without notice.

IOM 1062 Direct Drive Fluid Coolers 3

4Direct Drive Fluid Coolers IOM 1062
Product Offering
Model
AFS - 1140 RPM fan motors, single-row of fans
AFD - 1140 RPM fan motors, double row of fans
Size
Models 005 through 021 – 1/3 horsepower motors, 1140 RPM fan motors
Models 023 through 212 – 1 ½ horsepower motors, 1140 RPM fan motors
Voltage Option
42 = 208/230 volts / 60 Hertz / 3-phase
27 = 460 volts / 60 Hertz / 3-phase
37 = 575 volts / 60 Hertz / 3-phase
Special – 208 volts / 60 Hertz/ 1-phase, 208/230/380/460 volts/50 Hertz/3-phase
Control Option
A = Fan Cycling Thermostat with Control Transformer (120V)
E = Control Transformer Only (120V)
Y = None
Rough Duty Options
A = Totally enclosed motors
B = SealtiteWiring
C = PolyGuardfin coating with totally enclosed motors and Sealtite wiring
D = ElectroFincoating with totally enclosed motors and Sealtite wiring
E = PolyGuard Only
F = ElectroFin Only
G = Copper Fins Only (not available on 5 or 6-fan length models)
H = Copper Fins with totally enclosed motors and Sealtite wiring
Circuit Feed Option
Equals the number of feeds (from the header to the first pass of tubes) from capacity tables.
AFS
070
42
A
C
MODEL SIZE
VOLTAGE
OPTION
CONTROL
OPTION
ROUGH
DUTY
OPTION
056
CIRCUIT
FEED
OPTION

IOM 1062 Direct Drive Fluid Coolers 5
Introduction
Carefully check each shipment against the bill of lading and account for all items. Report any shortage
or damage to the delivering carrier. Damaged material is the delivering carrier’s responsibility. Do not
return to the manufacturer without prior approval.
Be careful when uncrating, to prevent damage. Heavy equipment should be left on units shipping base
until it has been moved to the final location. This equipment must be installed in accordance with
accepted industry standards. Failure to meet the following conditions may void the warranty:
1. System piping must be installed following industry standards for good piping practices.
2. Inert gas must be charged into piping during welding.
3. System must be thoroughly leak checked before initial charging.
4. Power supply to system must meet the following conditions:
Voltage for 208/230 motors not less than 195 volts or more than 253 volts.
All other voltages must be within 10% of nameplate ratings.
Phase imbalance not to exceed 2%.
5. All controls and equipment protection circuits properly connected per wiring diagram.
6. Factory installed wiring must not be changed without written factory approval.
7. Relief valves must meet all code requirements.
Installation
Inspection
When the equipment is received, carefully check all items against the bill of lading to check for
a complete shipment. Check all units for damage upon arrival. All shipping damage must be
reported to the carrier and a claim must be filed with the carrier. Check the unit’s serial plate
before unloading the unit to be sure that it agrees with the power supply available. Physical
damage to unit after acceptance is not the responsibility of Daikin.
Handling
Note: Installation and maintenance are to be performed only by qualified personnel who are
familiar with local codes and regulations, and experienced with this type of equipment.
Avoid rough handling shock due to impact or dropping the unit. Do not push or pull the unit.
Never allow any part of the unit to fall during unloading or moving, as this can result in serious
damage.
!WARNING
Improper lifting or moving unit can result in property damage, severe
personal injury or death. Follow rigging and moving instructions carefully.

6Direct Drive Fluid Coolers IOM 1062
Figure 1, Unit Rigging
Unit Location
Units are designed for outdoor application and may be mounted on a roof or concrete slab
(ground level installation). Install roof mounted units on steel channels or an I-beam frame to
support the unit above the roof. Use of vibration pads or isolators is recommended. The roof
must be strong enough to support the weight of the unit. For ground level installation, mount
units on a one-piece concrete slab with footings extending below the frost line. Be certain
concrete slabs are installed level and are properly supported to prevent settling. Locate the
unit far enough away from any wall or other obstruction to provide sufficient clearance for air
entrance. Do not attach more than two-feet of ductwork to the fan outlet. Avoid air
recirculation conditions that may be caused by sight screening, walls, etc. and keep unit fan
discharge away from any building air intakes. Do not install unit where exhaust or ventilation
equipment will affect entering air temperature or foul coils.
Holding Charge
The unit is shipped with a holding charge of dry nitrogen under nominal pressure.

IOM 1062 Direct Drive Fluid Coolers 7
Sound Vibration
Install units away from occupied spaces, utility areas, corridors and auxiliary spaces to
reduce the transmission of sound and vibration to occupied spaces. The fluid piping should
be flexible enough to prevent the transmission of noise and vibration from the unit into the
building. If the fluid lines are to be suspended from the structure of the building, use
isolation hangers to prevent the transmission of vibration. Where piping passes through a
wall, pack fiberglass and sealing compound around the lines to minimize vibration and
retain flexibility. The unit must be secured in its final location. Holes are provided in the
base runner for this purpose
Vertical airflow type units should be located no closer than the width of the unit from a wall
or other obstruction. It two or more units are to be positioned in the same area, a similar
distance should be maintained between adjacent units. Sufficient free area should be left
around and below unit to avoid air restriction to coil.
Walls or Obstructions
Locate the unit to ensure that air can
circulate freely and not be recirculated. For
proper air flow and access, all sides of the
unit must be at least the distance shown away
from any wall or obstruction. Increase this
distance whenever possible. Be sure enough
room is left for maintenance through access
doors and panels. Overhead obstructions are
not permitted. When enclosed by three walls
the unit must be installed as indicated for
units in a pit.
Multiple Units
For units placed side by side, the minimum
distance between units is as shown. If units
are placed end to end, the minimum distance
between units is 4 feet.
Units in Pits
The top of the unit should not be more than
two feet below the top of the pit, and side
minimum distance on all four sides as
shown.
Decorative Fences
Fences must have 50% free area, with 1 foot
undercut, at least the width of condenser
minimum clearance, and must not be higher
than the top of unit. If these requirements
are not met, unit must be installed as
indicated for "Units in Pits".
AFS = 4 ft.
AFD = 6 ft.
AIR FLOW
AFS = 6 ft.
AFD = 8 ft.
AIR FLOW AIR FLOW
AFS = 4 ft.
AFD = 6 ft.
AFS = 4 ft.
AFD = 6 ft.
STACK
(BY OTHERS
IF SUPPLIED)
2 FT. MAX.
AIR
FLOW
AFS = 3 ft.
AFD = 4 ft.
AFS = 3 ft.
AFD = 4 ft.
1 IN.
MIN.
AIR FLOW

8Direct Drive Fluid Coolers IOM 1062
General
1. Structure supporting unit must be designed to support both the unit and the fluid.
Table 1 provides weight of fluid per gallon. Provide suitable flashing of the roof, if this
is a roof installation. For ground level mounting, a concrete pad is recommended.
Mounting holes permit the units to be bolted down to withstand wind pressures.
Provide adequate clearance for unobstructed air flow to coils.
2. Level mounting is necessary to ensure proper fluid distribution through the coil as well
as flooded suction for the pump.
Table 1, Fluid Weight Per Gallon at 130
°
°°
° F
Percent Glycol Pounds per Gallon
Ethylene Glycol
Pounds per Gallon
Propylene Glycol
0 (Water) 8.25 8.22
10 8.33 8.29
20 8.50 8.37
30 8.58 8.42
40 8.80 8.49
50 8.82 8.53
3. Water piping must comply with local codes. Correct pipe sizing will help reduce
pumping power and operating costs.
4. In case of doubt, consult the manufacturer for the dry cooler fluid pressure drop at the
specific conditions on your job.
5. Provide sufficient valves and unions to permit easy access to parts subject to wear and
possible repair or replacement.
6. After fluid piping is completed, all joints should be leak tested.
7. Where city water make-up is required, follow local codes, making certain that
disconnecting provisions are provided.
8. Select wire in accordance with nameplate data and local codes.
Piping Installation
The piping system should provide maximum leak prevention. Weld or sweat joints should
be used where possible. The fact that glycol solutions or other heat transfer fluids will leak
where water will not, must be taken into account.
The glycol system should not employ an automatic fill with a pressure-reducing valve. This
is because a slight leak would lead to dilution of the mixture and possible freeze potential.
Any refill should be controlled so as to maintain the proper glycol-to-water ratio.
Table 2 shows pressure drops for various pipe sizes at flow rates commonly used with a
typical dry cooler. These pipe sizes are not necessarily always correct for the run from the
condenser to the dry cooler. Proper pipe size will depend on available pump head. This can
be determined by subtracting from the total available pump head at design flow, the
condenser pressure drop and the dry cooler pressure drop. Allow some safety factor for last
minute pipe fittings added to the system and for eventual fouling of the system.
a) Glycol piping requires no insulation except when fluid temperature will be below
ambient dewpoint temperatures.
b) Vents are required at all high points in the piping to bleed air when filling the system.
If fluid coolers are at high points, vent valves should be installed at each fluid cooler.
c) It is recommended that gate valves be installed on both sides of the pump to prevent
loss of fluid in the event the pump should require repair or replacement. Shut-off
valves are also recommended at water cooled condensers in case the condensing unit is
to be moved or requires maintenance involving the coolant system.

IOM 1062 Direct Drive Fluid Coolers 9
Table 2, Pressure Loss in Feet of Water
Flow
gpm
Pipe
Size Steel
in.
Type “L”
O.D. Copper
in.
Schedule 40 Steel
Head ft/100 ft
Equiv. Length
Copper Tube
Head ft/100 ft.
Equiv. Length
15 1 1 1/8 17.6 15.0
20 1 1 1/6 30.2 23.1
25 1 1 1/8 34.6
25 1 1/4 1 3/8 11.5 12.6
30 1 1/4 1 3/8 16.3 17.4
35 1 1/4 1 3/8 21.8 23.0
40 1 3/8 - 26.3
40 1 112 1 5/8 13.0 12.9
45 1 1/2 1 5/8 16.5 15.7
60 - 1 5/8 - 26.3
60 2 2 1/8 7.9 7.0
80 2 2 1/8 13.7 12.0
100 2 1/2 2 5/8 8.5 6.1
150 2 1/2 2 5/8 18.6 12.9
200 3 3 1/8 10.7 9.1
250 3 3 1/8 16.5 13.7
300 3 1/2 3 5/8 11.1 9.2
300 4 4 1/8 5.9 4.9
350 4 4 1/8 7.9 6.5
400 4 1/8 10.2 8.2
Figure 2, Typical Piping
NOTE: Isolation valves, vents, drains and other piping specialties are not shown, but are
required for a fully operational system.
EXPANSION
TANK VENT AND
FILL VALVE
FLUID COOLER
CIRCULATING
PUMP
SHUT-OFF
VALVE
SHUT-OFF
VALVE
DIVERTING
VALVE
WATER COOLED
CONDENSER
REFRIGERATION
COMPRESSOR
EVAPORATOR
WATER CHILLER
TXV
CHILLED WATER
HEAT EXCHANGER
FOR SUPPLEMENTAL
FREE COOLING

10 Direct Drive Fluid Coolers IOM 1062
Glycol Charge
The amount of ethylene glycol required depends upon the following:
•The holding volume of the system that includes the holding capacity of the heat source,
the interconnecting piping and the dry cooler.
•Percentage of glycol required by volume to provide protection at the design minimum
operating temperature.
Table 3, Percentage of Glycol to be Added by Percent Volume
Freeze Point °
°°
°F (°
°°
°C) 30 (-1) 20 (-7) 10 (-12) 0 (-18) -10 (-23) -20 (-29) -30 (-34)
Percent Propylene Glycol 4 16 25 32 38 44 48
Percent Ethylene Glycol 5 19 29 36 42 47 51
Use as a guide only. Proper precautions need to be taken to prevent freeze damage during low ambient. Consult
glycol vendor recommendations for specific freeze protection for your location.
Mixing Glycol and Water
Regardless of the strength of the mixture, you MUST premix the glycol and water prior to
adding it to the system. The chemical reaction between the two will release oxygen, which
is extremely undesirable in a close-loop system.
!CAUTION
For dry coolers operating without a glycol mixture, adequate fluid freeze protection of
some type is necessary during ambient air temperatures below 32°F
Glycol Sludge Prevention
Glycol systems may be subject to sludge formation in coils, due to one or more of the
following causes:
•Reaction of the corrosion inhibitor with galvanized piping (zinc).
•Reaction of the glycol with chromate type water additives.
•Reaction of the glycol with pipe dope, cutting oils, solder flux, and other system dirt.
Glycol manufacturers offer a specially inhibited glycol (formulated for snow melting
systems) that does not react with zinc. This glycol is also suitable for heat transfer systems.
Glycol manufacturers also provide inhibitor check services on a regular basis.
Consequently, good glycol system design requires the following precautions:
•No galvanized piping is to be used.
•System piping must be thoroughly cleaned and flushed with a heated trisodiurn
phosphate solution before filling with the water/glycol mixture.
•Chromate inhibitor treatment must not be used.
•The glycol manufacturer should provide inhibitor check service and supply additional
inhibitor as required.
Fluid Circulating Pump
Mechanical seal type pumps must be used for glycol systems. Gland type pumps would
cause glycol waste and, if used with a pressure reducing valve, will lead to dilution of the
glycol mixture and eventual freeze-up.
Pumps are selected for piping friction loss plus fluid pressure drop through the dry cooler
coil, plus pressure drop through the heat source. No allowance for vertical lift is made
since in a closed system a counterhead acts on the pump suction.

IOM 1062 Direct Drive Fluid Coolers 11
With glycol solutions the pump performance curve will drift to the right from its design
point, due to differences in circuit design, control valve application, pressure drop
calculations, etc. The pump should be selected high on the curve so as to provide for the
"drift'. The pump curve should be "flat" so that the pump will compensate for the inability
to exactly predict the final operating system flow condition and to provide sufficient flow
for satisfactory heat transfer and maximum protection against freezing at the far end of the
circuit. The pump motor should have sufficient power for operating over the entire pump
curve to prevent motor overload at reduced voltages. Paralleled pumps can also be used for
good power economy and continuous and automatic standby operation. Properly applied
parallel pumps will guard against system breakdown caused by a simple pump failure.
Certain older systems have non-operating standby pumps of equal capacity to the operating
unit. We recommend parallel pumps in continuous operation because they provide
practically the same type of standby, in addition to being completely automatic, at lower
initial and operating cost.
Ambient Conditions
Fluid coolers can be operated in an ambient temperature that will not cause freeze-up based
on freeze point of the fluid being used. Care must be exercised to maintain the proper
antifreeze percentage.
Physical Data
The inlet and outlet connection size will be based on the number of feeds in the fluid cooler
circuit. Use the tables below to determine connection sizes.
Table 4, AFS 005 – 021, Connection Sizes
Feeds Inlet / Outlet, in. Feeds Inlet / Outlet, in.
8 1 1/8 24 2 1/8
12 1 3/8 32 2 1/8
16 1 3/8 48 2 5/8
21 1 5/8 64 2 5/8
Table 5, AFS 023 – 107, Connection Sizes (Single-Row of Fans)
Feeds Inlet / Outlet, in.
14 2 1/8
18 2 1/8
21 2 5/8
28 2 5/8
42 3 1/8
56 3 5/8
Table 6, AFD Connection Sizes (Double-Row of Fans, Dual Fluid Connections)
Feeds Inlet / Outlet, in.
18 2 @ 2 1/8
28 2 @ 2 1/8
36 2 @ 2 1/8
42 2 @ 2 5/8
56 2 @ 2 5/8
84 2 @ 3 1/8
112 2 @ 3 5/8

12 Direct Drive Fluid Coolers IOM 1062
Table 7, Model 005 through 021, Physical Data
Fan Data
Model Fan
Configuration
Diameter of
Fans
Approx.
Net
Weight, lb.
Approx.
Shipping
Weight, lb.
Approx
Operating
Weight, lb.
005 1x1 24 180 325 240
008 1x1 26 260 380 330
010 1x2 24 450 600 537
012 1x2 26 470 620 557
014 1x2 26 510 650 615
016 1x2 26 530 680 635
021 1x3 26 550 725 698
Note; Net weight is dry unit only.
Table 8, Model 023 through 212, Physical Data
Fan Data
Model Fan
Configuration
Number of
Fans
CFM Operating
Charge, gal.
Approx.
Net
Weight, lb.
Approx.
Shipping
Weight, lb.
Approx.
Operating
Weight, lb.
AFS Single-Row of Fans
023 1x2 2 23,000 6.7 730 800 788
027 1x2 2 23,200 9.2 790 840 870
031 1x2 2 21,900 9.2 790 860 870
035 1x2 2 20,700 11.8 889 950 992
041 1x3 3 34,800 13.0 1190 1280 1303
045 1x3 3 32,900 13.0 1210 1300 1323
049 1x3 3 31,800 16.7 1240 1330 1385
053 1x4 4 46,400 16.7 1580 1690 1725
061 1x4 4 43,900 16.7 1620 1730 1765
065 1x4 4 42,400 21.7 1650 1760 1839
071 1x4 4 41,500 21.7 1760 1870 1949
075 1x5 5 54,900 20.4 2000 2150 2177
079 1x5 5 54,800 26.6 2020 2150 2251
089 1x5 5 51,800 26.6 2200 2390 2431
097 1x6 6 65,800 31.6 2390 2610 2665
107 1x6 6 62,200 31.6 2630 2850 2905
AFD Double Row of Fans
046 2x2 4 46,000 13.5 1540 1730 1657
054 2x2 4 46,400 18.5 1580 1770 1741
060 2x2 4 43,900 18.5 1620 1820 1781
066 2x2 4 42,400 23.5 1650 1840 1854
070 2x2 4 41,500 23.5 1760 1950 1964
080 2x3 6 69,700 25.9 2360 2570 2585
086 2x3 6 67,000 25.9 2380 2620 2605
090 2x3 6 65,800 25.9 2420 2630 2645
098 2x3 6 63,600 33.4 2480 2690 2771
106 2x4 8 92,900 33.3 3150 3360 3440
120 2x4 8 87,800 33.3 3230 3420 3520
132 2x4 8 84,800 43.3 3300 3470 3677
140 2x4 8 83,000 43.3 3510 3730 3887
152 2x5 10 190,700 40.7 4040 4290 4394
162 2x5 10 109,700 53.1 3990 4270 4452
168 2x5 10 106,000 53.1 4130 4450 4592
178 2x5 10 103,700 53.1 4390 4680 4852
194 2x6 12 131,600 63.1 4790 5150 5339
202 2x6 12 127,200 63.1 4960 5330 5509
212 2x6 12 124,400 63.1 5270 5670 5819
NOTES:
1. All fans are 30 inches in diameter.
2. Net weight is unit only.
3. Operating weight based on 50% ethylene glycol at 130°F.

IOM 1062 Direct Drive Fluid Coolers 13
Dimensional Data
Figure 3, Dimensions for AFS 005 through AFS 021 with Vertical Flow
Figure 4, Dimensions for AFS 005 through AFS 021 with Horizontal Flow
Dimensions (inches)
AFS Model Number of
Fans A B
005 1 39 ¾ 30
008 1 49 ¾ 40
010 2 69 ¾ 60
012 2 69 ¾ 60
014 2 89 ¾ 80
016 2 89 ¾ 80
021 3 129 ¾ 120
NOTES:
1. Inlet is the top connection, outlet the bottom. See Table 4 on page 11 for connection sizes.
2. The electrical box is on the same end as the fluid connections with knockouts on the bottom and sides.
8¾
B
A
24 ½
Adjustable
16 - 25
17
34
21 ½
(3) 7/8 Dia.
Mtg. Holes
43
2 ½ 37 ½
42 ½
(2) 7/8 Dia.
A
43
B
8¾

14 Direct Drive Fluid Coolers IOM 1062
Figure 5, Dimensions for AFS/D 023 through AFS/D 212
NOTES
1. Leg extension kits are available to raise unit by 30, 36, or 42 inches.
2. Inlet is the top connection, outlet the bottom. See Physical Data beginning on page 11 for connection sizes.
3. The electrical box is on the same end as the fluid connections with knockouts on the bottom and sides.
4. AFD double-row units have two sets of connections and an optional field-installed header.
5. Allow one-inch manufacturing tolerance.

IOM 1062 Direct Drive Fluid Coolers 15
Electrical Data
Electrical Wiring
The electrical installation should be in accordance with National Electrical Code, local
codes and regulations. Wiring diagrams shown are only basic and do not show fuses,
additional disconnect switches, etc., which must be provided in the field.
Units have a disconnect switch, mounted in the electrical box, with a through-the-door
handle.
All standard motors have internal inherent overload protectors. Therefore, contactors can
be used instead of starters requiring thermal protectors, eliminating the problem of
furnishing the proper heating elements.
All fluid coolers are furnished with either single-phase or three-phase fan motors which, are
identified by the unit data plate.
Electrical leads from each motor terminate at the unit junction box. Field connections must
be made from these leads in accordance with local, state and national codes.
Three-phase motors must be connected to three-phase power of voltage to agree with motor
and unit dataplate.
The motors are wired into a common junction box. The motors must be checked for proper
rotation. Be sure to check that motor voltage and control connection agree with electric
services furnished.

16 Direct Drive Fluid Coolers IOM 1062
1140 RPM Motor Data
Table 9, Electrical Data, Model 005 through 021, 1140 RPM
Fans 208-230/3/60 460/3/60 208-230/1/60
AFS
Model CFM No. Dia.
in. HP
Total
FLA MCA Max Fuse
Total
FLA MCA Max Fuse HP Total FLA MCA Max Fuse
005 5,050 1 24 1/3 2.6 3.3 6 1.3 1.6 3 1/3 3.4 4.2 6
008 6,450 1 26 1/3 2.6 3.3 6 1.3 1.6 3 1/2 3.9 4.2 6
010 10,100 2 24 1/3 5.2 5.9 10 2.6 2.9 6 1/3 6.8 7.6 10
012 12,400 2 26 1/3 5.2 5.9 10 2.6 2.9 6 1/2 7.8 8.8 10
014 13,700 2 26 1/3 5.2 5.9 10 2.6 2.9 6 1/2 7.8 8.8 10
016 12,900 2 26 1/3 5.2 5.9 10 2.6 2.9 6 1/2 7.8 8.8 10
021 20,500 3 26 1/3 7.8 8.5 10 3.9 4.2 6 1/2 11.7 12.7 15
Notes: 1. Standard motor voltage 208-230-460/3/60.
Table 10, Electrical Data, Models 023 through 212, 1140 RPM
Fan Data 208-230/3/60 460/3/60 575/3/60
Model Fan
Config.
No. of
Fans
cfm Total
FLA MCA Max. Fuse
Total
FLA MCA Max. Fuse
Total
FLA MCA Max. Fuse
AFS Single-row of Fans
023 1x2 2 19,780 14.0 15.8 20 7.0 7.9 10 5.6 6.4 10
027 1x2 2 19,800 14.0 15.8 20 7.0 7.9 10 5.6 6.4 10
031 1x2 2 19,110 14.0 15.8 20 7.0 7.9 10 5.6 6.4 10
035 1x2 2 18,340 14.0 15.8 20 7.0 7.9 10 5.6 6.4 10
041 1x3 3 29,700 21.0 22.8 25 10.5 11.4 15 8.4 9.2 10
045 1x3 3 28,600 21.0 22.8 25 10.5 11.4 15 8.4 9.2 10
049 1x3 3 28,070 21.0 22.8 25 10.5 11.4 15 8.4 9.2 10
053 1x4 4 38,600 28.0 29.8 30 14.0 14.9 15 11.2 12.0 15
061 1x4 4 37,250 28.0 29.8 30 14.0 14.9 15 11.2 12.0 15
065 1x4 4 38,020 28.0 29.8 30 14.0 14.9 15 11.2 12.0 15
071 1x4 4 35,710 28.0 29.8 30 14.0 14.9 15 11.2 12.0 15
075 1x5 5 46,610 35.0 36.8 40 17.5 18.4 20 14.0 14.8 15
079 1x5 5 46,200 35.0 36.8 40 17.5 18.4 20 14.0 14.8 15
089 1x5 5 44,580 35.0 36.8 40 17.5 18.4 20 14.0 14.8 15
097 1x6 6 55,400 42.0 43.8 50 21.0 21.9 25 16.8 17.6 20
107 1x6 6 53,460 42.0 43.8 50 21.0 21.9 25 16.8 17.6 20
AFD Double Row of Fans
046 2x2 4 39,570 28.0 29.8 30 14.0 14.9 15 11.2 12.0 15
054 2x2 4 39,600 28.0 29.8 30 14.0 14.9 15 11.2 12.0 15
060 2x2 4 38,210 28.0 29.8 30 14.0 14.9 15 11.2 12.0 15
066 2x2 4 37,530 28.0 29.8 30 14.0 14.9 15 11.2 12.0 15
070 2x2 4 36,770 28.0 29.8 30 14.0 14.9 15 11.2 12.0 15
080 2x3 6 59,400 42.0 43.8 50 21.0 21.9 25 16.8 17.6 20
086 2x3 6 58,510 42.0 43.8 50 21.0 21.9 25 16.8 17.6 20
090 2x3 6 57,320 42.0 43.8 50 21.0 21.9 25 16.8 17.6 20
098 2x3 6 56,240 42.0 43.8 50 21.0 21.9 25 16.8 17.6 20
106 2x4 8 77,200 56.0 57.8 60 28.0 28.9 30 22.4 23.2 30
120 2x4 8 74,500 56.0 57.8 60 28.0 28.9 30 22.4 23.2 30
132 2x4 8 72,790 56.0 57.8 60 28.0 28.9 30 22.4 23.2 30
140 2x4 8 71,310 56.0 57.8 60 28.0 28.9 30 22.4 23.2 30
152 2x5 10 93,120 70.0 71.8 80 35.0 35.9 40 28.0 28.8 30
162 2x5 10 92,400 70.0 71.8 80 35.0 35.9 40 28.0 28.8 30
168 2x5 10 91,010 70.0 71.8 80 35.0 35.9 40 28.0 28.8 30
178 2x5 10 89,170 70.0 71.8 80 35.0 35.9 40 28.0 28.8 30
194 2x6 12 110.900 84.0 85.8 90 42.0 42.9 45 33.6 34.4 40
202 2x6 12 109,240 84.0 85.8 90 42.0 42.9 45 33.6 34.4 40
212 2x6 12 107,020 84.0 85.8 90 42.0 42.9 45 33.6 34.4 40
1. All fan blades are 30” in diameter.
2. Standard motors are 1 ½ HP, 208-230/460/3/60 or 575 volt.
3. Optional single-phase motors are ¾ hp, 208/230 volt, 4.8 FLA, 1140 rpm.

IOM 1062 Direct Drive Fluid Coolers 17
830 RPM Motor Data
Table 11, Electrical Data, Models 023 through 212, 830 RPM
Fan Data 208-230/3/60 460/3/60 575/3/60
Model Fan
Config.
No. of
Fans
Total
FLA MCA Max. Fuse
Total
FLA MCA Max. Fuse
Total
FLA MCA Max. Fuse
AFS Single-row of Fans
023 1x2 2 9.6 10.8 15 4.8 5.4 6 4.0 4.5 10
027 1x2 2 9.6 10.8 15 4.8 5.4 6 4.0 4.5 10
031 1x2 2 9.6 10.8 15 4.8 5.4 6 4.0 4.5 10
035 1x2 2 9.6 10.8 15 4.8 5.4 6 4.0 4.5 10
041 1x3 3 14.4 15.6 20 7.2 7.8 10 6.0 6.5 10
045 1x3 3 14.4 15.6 20 7.2 7.8 10 6.0 6.5 10
049 1x3 3 14.4 15.6 20 7.2 7.8 10 6.0 6.5 10
053 1x4 4 19.2 20.4 25 9.6 10.2 15 8.0 8.5 10
061 1x4 4 19.2 20.4 25 9.6 10.2 15 8.0 8.5 10
065 1x4 4 19.2 20.4 25 9.6 10.2 15 8.0 8.5 10
071 1x4 4 19.2 20.4 25 9.6 10.2 15 8.0 8.5 10
075 1x5 5 24.0 25.2 30 12.0 12.6 15 10.0 10.5 15
079 1x5 5 24.0 25.2 30 12.0 12.6 15 10.0 10.5 15
089 1x5 5 24.0 25.2 30 12.0 12.6 15 10.0 10.5 15
097 1x6 6 28.8 30.0 30 14.4 15.0 15 12.0 12.5 15
107 1x6 6 28.8 30.0 30 14.4 15.0 15 12.0 12.5 15
AFD Double Row of Fans
046 2x2 4 19.2 20.4 25 9.6 10.2 15 8.0 8.5 10
054 2x2 4 19.2 20.4 25 9.6 10.2 15 8.0 8.5 10
060 2x2 4 19.2 20.4 25 9.6 10.2 15 8.0 8.5 10
066 2x2 4 19.2 20.4 25 9.6 10.2 15 8.0 8.5 10
070 2x2 4 19.2 20.4 25 9.6 10.2 15 8.0 8.5 10
080 2x3 6 28.8 30.0 30 14.4 15.0 15 12.0 12.5 15
086 2x3 6 28.8 30.0 30 14.4 15.0 15 12.0 12.5 15
090 2x3 6 28.8 30.0 30 14.4 15.0 15 12.0 12.5 15
098 2x3 6 28.8 30.0 30 14.4 15.0 15 12.0 12.5 15
106 2x4 8 38.4 39.6 40 19.2 19.8 20 16.0 16.5 20
120 2x4 8 38.4 39.6 40 19.2 19.8 20 16.0 16.5 20
132 2x4 8 38.4 39.6 40 19.2 19.8 20 16.0 16.5 20
140 2x4 8 38.4 39.6 40 19.2 19.8 20 16.0 16.5 20
152 2x5 10 48.0 49.2 50 24.0 24.6 25 20.0 20.5 25
162 2x5 10 48.0 49.2 50 24.0 24.6 25 20.0 20.5 25
168 2x5 10 48.0 49.2 50 24.0 24.6 25 20.0 20.5 25
178 2x5 10 48.0 49.2 50 24.0 24.6 25 20.0 20.5 25
194 2x6 12 57.6 58.8 60 28.8 29.4 30 24.0 24.5 30
202 2x6 12 57.6 58.8 60 28.8 29.4 30 24.0 24.5 30
212 2x6 12 57.6 58.8 60 28.8 29.4 30 24.0 24.5 30
Notes:
1. All fan blades are 30” in diameter.
2. All motors are 1 HP, 208-230/460/3/60 or 575 volt.

18 Direct Drive Fluid Coolers IOM 1062
Wiring Diagrams
Figure 6, Typical Wiring for AFS Models
NOTE: Unit specific wiring diagrams are shipped with the unit.

IOM 1062 Direct Drive Fluid Coolers 19
Start Up
Prestart
Check for correct dry cooler fan rotation. This can be done by quickly jogging the fan
contactor. Be sure that the fans run freely. The same check is recommended for pumps.
Filling and Purging the System
The system should be pressure tested before adding glycol. The system can be tested with
air or water, however if the ambient temperature is at or below freezing the use of air is
recommended. Test pressure should not exceed 60 psig.
Roof Mounted Fluid Cooler
To fill the system, pour the premixed water and glycol into the expansion tank. Fill the
system until the expansion tank is half full, then purge the air from all vents. Operate the
system for a minute, then purge all vents again, and add glycol as required. Repeat the
purging of vents after the first hour of operation and again after several hours of operation.
Ground Mounted Fluid Cooler
The fluid cooler may be lowest point in the system; consequently the premixed water and
glycol will have to be pumped into the system.
Temperature Control
General
Some method of controlling the fluid temperature is required.
The standard temperature control consists of fan contactors arranged for field-connection to
a field-supplied and mounted control system; in other words, no control. Setting and
adjusting these controls will depend on the type furnished.
Daikin can furnish an optional control system using Johnson Controls A419 temperature
controls. Installation and adjustment are explained in the following paragraphs.
Installation
If the fan cycle thermostat option is provided, the solid state sensors are shipped coiled in
the control panel to prevent damages during shipment and installation. Mounted the sensors
securely to the fluid cooler header and insulate. Mount sensors on the entering or leaving
fluid headers depending on site requirements. Route and secure sensor wiring for
protection from vibration and interference.
Setting
The control is a single-stage, electronic temperature control with an SPDT output relay. It
has the following features:
•lockable keypad for programming,
•LCD for temperature and status display,
•LED for output relay status
•heating and cooling modes with adjustable setpoint and differential

20 Direct Drive Fluid Coolers IOM 1062
The electronic temperature control must be set for heating or cooling application by
placement of the mode jumper. Temperature setting is selected based on entering or leaving
fluid temperature control. Differential settings are selected to prevent excessive fan cycling
and fluid temperature swing.
Definitions
•Cut-in: The temperature at which the N.O. (Normally Open) SPDT (Single-Pole,
Double-Throw) output relay contact closes.
•Cut-out: The temperature at which the N.O. SPDT output relay contact opens.
Control Functions
The A419 control allows the user to set a variety of functions using the keypad and
jumpers. These functions are described below. For instructions on setting function
parameters, see the Adjustments section.
Keypad Programmable Functions
Setpoint (SP) establishes the temperature at which the equipment is switched on or off,
depending on the user selected mode of operation. Setpoint range is -30 to 212°F (-34 to
100°C). See the Cooling/Heating and Setpoint Modes section on page 22.
If Setpoint mode is set to Cut-in, the setpoint is the temperature at which the control closes
the N.O. contacts. If Setpoint mode is set to Cut-out, the setpoint is the temperature at
which the N.O. contacts open. Refer to Figure 9 and Figure 10.
Differential (dIF) establishes the difference in temperature between Cut-in and Cut-out.
The differential is set relative to Setpoint and may be set from 1 to 30F° or C. Refer to
Figure 9 and Figure 10.
Anti-Short Cycle Delay (ASd) establishes the minimum time that the fan remains off
before restarting again. The anti-short cycle delay is activated when the A419 control has
cycled the fan off. The delay does not allow the fan to be restarted until the programmed
amount of time has elapsed. When the delay is activated, the LCD alternately flashes the
sensor temperature and ASd. The anti-short cycle delay may be programmed for 0 to 12
minutes in 1-minute increments.
For example, if the anti-short cycle delay is programmed for 7 minutes, the control will not
restart the fan until 7 minutes after the equipment was turned off, regardless of the
temperature. During the 7-minute period, if the temperature reaches the cut-in setpoint, the
display alternates between the sensor temperature and ASd to indicate that the on cycle is
being delayed. After the 7-minute delay has elapsed, the fan is turned on, and ASd stops
flashing.
Note: A power interruption to the control will activate the anti-short cycle delay.
Figure 7, Anti-short Cycle Delay