International comfort products PAE Series User manual

Printed in U.S.A.
522 01 1001 01 01--15--08
PACKAGED AIR CONDITIONING UNITS
Installation Instructions
PAE Series -- 3 Phase
3to6Ton
Code: PAE
International Comfort Products, LLC
Lewisburg, TN. 37091

2522 01 1001 01
IMPORTANT -- READ BEFORE INSTALLING
1. Read and become familiar with these installation
instructions before installing this unit (Fig. 1A and1B).
2. Be sure the installation conforms to all applicable local and
national codes.
3. These instructions contain important information for the
proper maintenance and repair of this equipment. Retain
these instructions for future use.
CONTENTS
Installation 2
Step 1. -- Provide Unit Support 2
Step 2. -- Field Fabricate Ductwork 5
Step 3. -- Install External Trap for Condensate Drain 5
Step 4. -- Rig and Place Unit 5
Step 5. -- Make Electrical Connections 9
Step 6. -- Adjust Factory--Installed Options 16
Step 7. -- Adjust Evaporator--Fan Speed 24
PRE--START--UP 37
START--UP 37
SERVICE 39
TROUBLESHOOTING 43
START--UP CHECKLIST 47
SAFE INSTALLATION REQUIREMENTS
Installation and servicing of this equipment can be hazardous
due to mechanical and electrical components. Only trained and
qualified personnel should install, repair, or service this
equipment.
Untrained personnel can perform basic maintenance functions
such as cleaning and replacing air filters. All other operations
must be performed by trained service personnel. When
working on this equipment, observe precautions in the
literature, on tags, and on labels attached to or shipped with the
unit and other safety precautions that may apply.
Follow all safety codes. Installation must be in compliance with
local and national building codes. Wear safety glasses,
protective clothing, and work gloves. Have fire extinguisher
available. Read these instructions thoroughly and follow all
warnings or cautions included in literature and attached to the
unit.
Recognize safety information. This is the safety--alert
symbol . When you see this symbol in instructions or manuals,
be alert to the potential for personal injury.
Understand the signal words DANGER,WARNING,
CAUTION, and NOTE. These words are used with the
safety--alert symbol. DANGER identifies the most serious
hazards which will result in serious injury or death. WARNING
signifies a hazard which could result in serious injury or death.
CAUTION is used to identify unsafe practices which may result
in minor personal injury or product and property damage.
NOTE is used to highlight suggestions which will result in
enhanced installation, reliability, or operation.
These instructions cover minimum requirements and conform
to existing national standards and safety codes. In some
instances, these instructions exceed certain local codes and
ordinances, especially those that may not have kept up with
changing residential construction practices. We require these
instructions as a minimum for a safe installation.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or
death.
Before installing or servicing system, always turn off power
supply to unit and install lockout tag. There may be more than
one disconnect switch. Turn off accessory heater power switch
if applicable.
!WARNING
PROPERTY DAMAGE HAZARD
CAUTION
!
Failure to follow this caution can cause damage to the unit.
Ensure voltage listed on unit data plate agrees with electrical
supply provided for the unit.
INSTALLATION
The unit is shipped in the vertical discharge configuration. To
convert to horizontal configuration, remove the horizontal duct
opening covers. Using the same screws, install the covers on
the duct openings in the basepan of the unit with the
insulation--side down. Seals around duct openings must be
tight. See Fig. 2.
Step 1—PROVIDE UNIT SUPPORT
Roofcurb
Assemble and install accessory roof curb in accordance with
instructions shipped with curb. Install insulation, cant strips,
roofing felt, and counter flashing as shown. Ductwork must be
attached to curb, not to unit. If electric or control power is to be
routed through the basepan, attach the accessory
thru-the-bottom service connections to the basepan in
accordance with the accessory installation instructions.
Connection must be installed before unit is set on roof curb.
IMPORTANT: The gasketing of the unit to the roof curb is
critical for a water tight seal. Install gasketing material supplied
with the roof curb. Improperly applied gasketing also can result
in air leaks and poor unit performance.
Curb should be level. This is necessary for the unit drain to
function properly. Unit leveling tolerances are shown in Fig. 3.
Refer to Accessory Roof Curb Installation Instructions for
additional information as required.
!

3
522 01 1001 01
FIGURE 1
Base Unit Dimensions:
PAE036--60
A
3
PAE
PAE PAE
Z
Z
Z
Z
Z
DN

4522 01 1001 01
Figure 1B
Base Unit Dimensions:
PAE072
132
50.8
67.6 127 57.6 112
236 149520
PAE072 59.9
Z
Z
Z
Z
Z
DN

5
522 01 1001 01
FIGURE 2 HORIZONTAL CONVERSION PANELS
Slab Mount (Horizontal Units Only)
Provide a level concrete slab that extends a minimum of 6 in.
beyond the unit cabinet. Install a gravel apron in front of the
condenser coil air inlet to prevent grass and foliage from
obstructing airflow.
NOTE: Horizontal units may be installed on the roof curb if
required.
Alternate Unit Support
When the curb or adapter cannot be used, support unit with
sleeper rails using unit curb or adapter support area. If sleeper
rails cannot be used, support the long sides of the unit with a
minimum of 3 equally spaced 4--in. x 4--in. pads on each side.
Step 2—FIELD FABRICATE DUCTWORK
Secure all ducts to roof curb and building structure on vertical
discharge units. Do not connect ductwork to unit. For horizontal
applications, field--supplied flanges should be attached to
horizontal discharge openings and all ductwork should be
attached to the flanges. Insulate and weatherproof all external
ductwork, joints, and roof openings with counter flashing and
mastic in accordance with applicable codes.
Ducts passing through an unconditioned space must be
insulated and covered with a vapor barrier.
If a plenum return is used on a vertical unit, the return should
be ducted through the roof deck to comply with applicable fire
codes.
A minimum clearance is not required around ductwork. Cabinet
return air static pressure (a negative condition) should not
exceed 0.35 in. wg with economizer or 0.45 in. wg without
economizer.
Step 3—INSTALL EXTERNAL TRAP FOR CONSENSATE
DRAIN
The unit’s 3/4--in. condensate drain connections are located on
the bottom and side of the unit. Unit discharge connections do
not determine the use of drain connections; either drain
connection can be used with vertical or horizontal applications.
When using the standard side drain connection, make sure the
plug (Red) in the alternate bottom connection is tight before
installing the unit.
To use the bottom drain connection for a roof curb installation,
relocate the factory--installed plug (Red) from the bottom
connection to the side connection. The center drain plug looks
like a star connection, however it can be removed with a 1/2--in.
socket drive. See Fig. 4. The piping for the condensate drain
and external trap can be completed after the unit is in place.
All units must have an external trap for condensate drainage.
Install a trap at least 4--in. deep and protect against freeze--up.
If drain line is installed downstream from the external trap, pitch
the line away from the unit at 1 in. per 10 ft of run. Do not use
a pipe size smaller than unit connection (3/4 in.). See Fig. 5.
Step 4—RIG AND PLACE UNIT
Inspect unit for transportation damage. File any claim with
transportation agency. Keep unit upright and do not drop.
Spreader bars are not required if top crating is left on unit.
Rollers may be used to move unit across a roof. Level by using
unit frame as a reference. See Table 1 and Fig.6 for additional
information. See operating weight in Table 1 and Fig. 1A and
1B.
Lifting holes are provided in base rails as shown in Fig. 6. Refer
to rigging instructions on unit.
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage.
All panels must be in place when rigging and lifting.
CAUTION
!
Positioning
Maintain clearance around and above unit to provide proper
airflow and service access. See Fig. 1A and 1B. A properly
positioned unit will have the following clearances: 1/4-in.
clearance between roof curb and base rails on each side and
duct end of unit; 1/4-in. clearance between roof curb and
condenser coil end of unit.
Do not install unit in an indoor location. Do not locate unit air
inlets near exhaust vents or other sources of contaminated
air.
Although unit is weatherproof, guard against water from high-
er level runoff and overhangs. After unit is in position, remove
shipping materials and top crating.

FIGURE 6 Rigging Details
NOTES:
1. Dimensions in ( ) are in millimeters.
2. Hook rigging shackles through holes in base rail, as shown in
detail “A.” Holes in base rails are centered around the unit center
of gravity. Use wooden top skid when rigging to prevent rigging
straps from damaging unit.
3. Unit weights do not include economizer. See Table 1 for econo--
mizer weights.
6522 01 1001 01
FIGURE 3 Unit Leveling Tolerances
MAXIMUM ALLOWABLE
0.5 1.0 1.0
A--B B--C A--C
FIGURE 4 Condensate Drain Connection
Horizontal Drain Outlet Drain Plug
NOTE: Drain plug is shown in factory---installed position.
Condensate Drain Piping Details
NOTE: Trap should be deep enough to offset maximum unit static
difference.
A 4--in. trap is recommended.
FIGURE 5
PAE UNIT SIZE MAX. WEIGHT A B C
lb. kg In. mm In. mm In. mm
036 415 188
73.69 1872 35.0 889 33.35 847
048 425 193
060 445 202
072 570 259

7
522 01 1001 01
Table 1—Physical Data -- PAE036--72
PAE UNIT SIZE 036 048 060 072
NOMINAL CAPACITY (tons) 3 4 5 6
OPERATING WEIGHT (lb) Unit
Al/Al* 365 375 395 520
Cu/Cu* 373 387 402 —
Economizer 50 50 50 50
Roof Curb† 115 115 115 115
COMPRESSOR Reciprocating Scroll
Quantity 1 1 1 1
No. Cylinders (per Circuit) 2 2 2 2
Oil (oz) 50 50 50 60
REFRIGERANT TYPE R-22
Expansion Device Fixed Orifice Metering Device
Operating Charge (lb-oz)
Circuit 1 4-4 6-6 6-14 11-0
CONDENSER COIL Enhanced Copper Tubes, Aluminum Lanced Fins
Rows...Fins/in. 1...17 2...17 2...17 2...17
Total Face Area (sq ft) 8.36 8.36 10.42 16.5
CONDENSER FAN Propeller Type
Nominal Cfm 3500 4000 4000 4100
Quantity...Diameter (in.) 1...22.0 1...22.0 1...22.0 1...22.0
Motor Hp...Rpm 1/4...1100 1/4...1100 1/4...1100 1/4...1100
Watts Input (Total) 325 325 325 320
EVAPORATOR COIL Enhanced Copper Tubes, Aluminum Double-Wavy Fins
Rows...Fins/in. 2...15 2...15 3...15 4...15
Total Face Area (sq ft) 4.17 5.5 5.5 5.5
EVAPORATOR FAN Centrifugal Type
Quantity...Size (in.) Std 1...10 x 10 1...10 x 10 1...11 x 10 1...10 x 10
Alt 1...10 x 10 1...10 x 10 1...10 x 10 —
High-Static 1...10 x 10 1...10 x 10 1...11 x 10 1...10 x 10
Type Drive Std Direct Direct Direct Belt
Alt Belt Belt Belt —
High-Static Belt Belt Belt Belt
Nominal Cfm 1200 1600 2000 2100
Maximum Continuous Bhp Std .34 .75 1.20 2.40
Alt 1.20 1.20 1.30/2.40** —
High-Static 2.40 2.40 2.90 2.90
Motor Frame Size Std 48 48 48 56
Alt 48 48 56 —
High-Static 56 56 56 56
Nominal Rpm High/Low (Direct Drive) Std 860/800 1075/970 1075/970 —
Fan Rpm Range Std — — — 1070-1460
Alt 685-1045 770-1175 878-1192 —
High-Static 1075-1455 1075-1455 1300-1685 1300-1685
Motor Bearing Type Ball Ball Ball Ball
Maximum Allowable Rpm 2100 2100 2100 2100
Motor Pulley Pitch Diameter Min/Max (in.) Std — — — 2.8/3.8
Alt 1.9/2.9 1.9/2.9 2.4/3.4 —
High-Static 2.8/3.8 2.8/3.8 3.4/4.4 3.4/4.4
Nominal Motor Shaft Diameter (in.) Std 1/21/21/25/8
Alt 1/21/25/8—
High-Static 5/85/85/87/8
Fan Pulley Pitch Diameter (in.) Std — — — 4.5
Alt 4.5 4.0 4.5 —
High-Static 4.5 4.5 4.5 4.5
Belt, Quantity...Type...Length (in.) Std — — — 1...A...40
Alt 1...A...34 1...A...34 1...A...39 —
High-Static 1...A...39 1...A...39 1...A...40 1...A...40
Pulley Center Line Distance (in.) Std — — — 14.7-15.5
Alt 10.0-12.4 10.0-12.4 14.7-15.5 —
High-Static 10.0-12.4 10.0-12.4 14.7-15.5 14.7-15.5
Speed Change per Full Turn of Std — — — 80
Movable Pulley Flange (rpm) Alt 48 70 80 —
High-Static 65 65 60 60
Movable Pulley Maximum Full Turns Std — — — 5
From Closed Position Alt 5 5 6 —
High-Static 6 6 5 5

8522 01 1001 01
Table 1—Physical Data -- PAE036--72 (Cont.)
PAE UNIT SIZE 036 048 060 072
Factory Setting Std — — — 3
Alt 3 3 3 —
High-Static 31/231/231/231/2
Factory Speed Setting (rpm) Std — — — 1226
Alt 829 932 1035 —
High-Static 1233 1233 1416 1416
Fan Shaft Diameter at Pulley (in.) 5/85/85/85/8
High Pressure Switch (psig) 450 ±50 500 ±50
Internal Relief (Differential) Cutout 428 428
Reset (Auto.) 320 320
Low Pressure Switch (psig) Cutout 7±3
Reset (Auto.) 22 ±7
Freeze Protection Thermostat (F) Opens 30 ±5
Closes 45 ±5
OUTDOOR-AIR INLET SCREENS Cleanable. Screen size and quantity varies with option selected.
RETURN-AIR FILTERS Throwaway
Quantity...Size (in.) 2...16 x 25 x 2
LEGEND
Al -- Aluminum
Bhp -- Brake Horsepower
Cu -- Copper
*Condenser coil fin material.
{Weight of 14--in. roof curb.

9
522 01 1001 01
Step 5—MAKE ELECTRICAL CONNECTIONS
Failure to follow this warning could result in the installer being liable
for personal injury of others.
Unit cabinet must have an uninterrupted, unbroken electrical
ground to minimize the possibility of personal injury if an electrical
fault should occur. This ground may consist of electrical wire
connected to unit ground lug in control compartment, or conduit
approved for electrical ground when installed in accordance with
NEC (National Electrical Code), ANSI/NFPA (American National
Standards Institute/National Fire Protection Association) 70 (latest
year), and local electrical codes.
!WARNING
All units except 208/230-v units are factory wired for the voltage
shown on the nameplate. If the 208/230-v unit is to be
connected to a 208-v power supply, the transformer must be
rewired by moving the black wire from 230-v 1/4-in. spade
terminal and connecting it to 208-v 1/4-in. spade terminal of
transformer.
Refer to unit label diagram and Electrical Data Tables 2A and
2B for additional information. Pigtails are provided for field wire
connections. Use factory-supplied splices or UL (Underwriters’
Laboratories) approved copper/aluminum connector.
When installing units, provide a disconnect per the NEC.
All field wiring must comply with NEC and local requirements.
Install field wiring as follows:
1. Install conduit through side panel openings. Install conduit
between disconnect and control box.
2. Install power lines to terminal connections as shown in Fig.
8.
FIGURE 7 POWER WIRING CONNECTIONS
208/230--3--60
460--3--60
(SIZE 072)
LEGEND
C -- Contactor
COMP -- Compressor
IFC -- Indoor--Fan Contactor
NEC -- National Electric Code
TB -- Terminal Block
Field Power Supply
Install an approved accessory thermostat assembly according
to installation instructions included with the accessory. Locate
thermostat assembly on a solid wall in the conditioned space
to sense average temperature in accordance with thermostat
installation instructions. Connect thermostat wires to terminal
board.
Route thermostat cable or equivalent single leads of colored
wire from subbase terminals through connector on unit to
low--voltage connections (shown in Fig. 9).
NOTE: For wire runs up 50 ft, use no. 18 AWG (American Wire
Gage) insulated wire (35 C minimum). For 50 to 75 ft, use no.
16 AWG insulated wire (35 C minimum). For over 75 ft, use no.
14 AWG insulated wire (35 C minimum). All wire larger than no.
18 AWG cannot be directly connected to the thermostat and will
require a junction box and splice at the thermostat.
Pass the control wires through the hole provided in the corner
post; then feed wires through the raceway built into the corner
post to the 24--v barrier located on the left side of the control
box. See Fig. 10. The raceway provides the UL required
clearance between high--voltage and low--voltage wiring.
NOTE: If thru-the-bottom power connections are used refer
to the accessory installation instructions for information on
power wiring. Refer to Fig. 1A and 1B for drilling holes in
basepan.
IMPORTANT: Optional factory-installed, alternate evaporator
fan motors are not available for PAE072 units.

10 522 01 1001 01
FIGURE 8 LOW VOLTAGE CONNECTIONS FIGURE 9 FIELD CONTROL WIRING RACEWAY
WIRE
CONNECTIONS
TO
LOW--VOLTAGE
SECTION
(CONNECTION
BOARD)
COOL STAGE 1
FAN
HEAT STAGE 1
COOL STAGE 2
HEAT STAGE 2
24 VAC HOT
24 VAC COM
N/A
OUTDOOR AIR
SENSOR
Y1/W2
G
W/W1
Y/Y2
O/W2
R
C
S1
S2
THERMOSTAT DIPSWITCH SETTINGS
R
G
Y1
Y2
W1
W2
C
IPD/X
ON
OFF
ABCD
LEGEND
NOTE: Underlined letter indicates active thermostat output when con--
figured for A/C operation.
Field Wiring
Table 2A -- Electrical Data (Without Convenience Outlet)
PAE
UNIT
SIZE
NOMINAL
V-PH-Hz
IFM
TYPE
VOLTAGE
RANGE
COMPRESSOR
(ea) OFM (ea)
IFM
FLA
ELECTRIC HEAT POWER SUPPLY
DISCONNECT
SIZE†
Min Max Qty RLA LRA Qty Hp FLA
Nominal
kW FLA MCA MOCP* FLA LRA
036
208/230-3-60
STD
187 254 110.2 75 11/41.4
3.5
—/— —/— 17.7/17.7 25/25 17/17 85/ 85
3.3/ 4.4 9.2/10.6 17.7/17.7 25/25 17/17 85/ 85
4.9/ 6.5 13.6/15.6 21.3/23.9 25/25 20/22 85/ 85
6.5/ 8.7 18.1/20.9 27.0/30.5 30/35 25/28 85/ 85
7.9/10.5 21.9/25.3 31.7/35.9 35/40 29/33 85/ 85
12.2/16.0 33.4/38.4 46.1/52.4 50/60 42/48 85/ 85
ALT 4.9
—/— —/— 19.1/19.1 25/25 19/19 90/ 90
3.3/ 4.4 9.2/10.6 19.1/19.4 25/25 19/19 90/ 90
4.9/ 6.5 13.6/15.6 23.1/25.7 25/30 21/24 90/ 90
6.5/ 8.7 18.1/20.9 28.8/32.3 30/35 26/30 90/ 90
7.9/10.5 21.9/25.3 33.5/37.7 35/40 31/35 90/ 90
12.3/16.0 33.4/38.4 47.8/54.2 50/60 44/50 90/ 90
HIGH 5.2
—/— —/— 19.4/19.4 25/25 19/19 109/109
3.3/ 4.4 9.2/10.6 19.4/19.7 25/25 19/19 109/109
4.9/ 6.5 13.6/15.6 23.4/26.0 30/30 22/24 109/109
6.5/ 8.7 18.1/20.9 29.2/32.7 30/35 27/30 109/109
7.9/10.5 21.9/25.3 33.9/38.1 35/40 31/35 109/109
12.3/16.0 33.4/38.4 48.2/54.6 50/60 44/50 109/109
460-3-60
STD
414 508 14.4 40 11/40.8
1.3
— — 7.6 15 744
6.0 7.2 10.6 15 10 45
8.8 10.6 14.9 15 14 45
11.5 13.8 18.9 20 17 45
14.0 16.8 22.7 25 21 45
ALT 2.1
— — 8.4 15 848
6.0 7.2 11.6 15 11 48
8.8 10.6 15.9 20 15 48
11.5 13.8 19.9 20 18 48
14.0 16.8 23.7 25 22 48
HIGH 2.6
— — 8.9 15 957
6.0 7.2 12.3 15 11 57
8.8 10.6 16.5 20 15 57
11.5 13.8 20.5 25 19 57
14.0 16.8 24.3 25 22 57

11
522 01 1001 01
Table 2A -- Electrical Data (Without Convenience Outlet)
PAE
UNIT
SIZE
NOMINAL
V-PH-Hz
IFM
TYPE
VOLTAGE
RANGE
COMPRESSOR
(ea) OFM (ea)
IFM
FLA
ELECTRIC HEAT POWER SUPPLY
DISCONNECT
SIZE†
Min Max Qty RLA LRA Qty Hp FLA
Nominal
kW FLA MCA MOCP* FLA LRA
048
208/230-3-60
STD
187 254 115.4 90 11/41.4
3.5
—/— —/— 24.2/24.2 30/30 23/23 101/101
4.9/6.5 13.6/15.6 24.2/24.2 30/30 23/23 101/101
6.5/8.7 18.1/20.9 27.0/30.5 30/35 25/28 101/101
12.0/16.0 33.4/38.4 46.1/52.4 50/60 42/48 101/101
15.8/21.0 43.8/50.5 59.1/67.5 60/70** 54/62 101/101
ALT 4.9
—/— —/— 25.6/25.6 30/30 25/25 105/105
4.9/6.5 13.6/15.6 25.6/25.7 30/30 25/25 105/105
6.5/8.7 18.1/20.9 28.8/32.3 30/35 26/30 105/105
12.0/16.0 33.4/38.4 47.8/54.2 50/60 44/50 105/105
15.8/21.0 43.8/50.5 60.8/69.3 70/70** 56/64 105/105
HIGH 5.2
—/— —/— 25.9/25.9 30/30 25/25 124/124
4.9/6.5 13.6/15.6 25.9/26.0 30/30 25/25 124/124
6.5/8.7 18.1/20.9 29.2/32.7 30/35 27/30 124/124
12.0/16.0 33.4/38.4 48.2/54.6 50/60 44/50 124/124
15.8/21.0 43.8/50.5 61.2/69.6 70/70** 56/64 124/124
460-3-60
STD
414 508 18.3 45 11/40.8
1.8
— — 13.0 20 13 51
6.0 7.2 13.0 20 13 51
11.5 13.8 19.5 20 18 51
14.0 16.8 23.3 25 21 51
23.0 27.7 36.8 40 34 51
ALT 2.1
— — 13.3 20 13 53
6.0 7.2 13.3 20 13 53
11.5 13.8 19.9 20 18 53
14.0 16.8 23.7 25 22 53
23.0 27.7 37.2 40 34 53
HIGH 2.6
— — 13.8 20 13 62
6.0 7.2 13.8 20 13 62
11.5 13.8 20.5 25 19 62
14.0 16.8 24.3 25 22 62
23.0 27.7 37.8 40 35 62
060
208/230-3-60
STD
187 254 116 114 11/41.4
5.9
—/— —/— 27.3/27.3 35/35 27/27 128/128
4.9/6.5 13.6/15.6 27.3/27.3 35/35 27/27 128/128
7.9/10.5 21.9/25.3 34.7/38.9 40/40 32/36 128/128
12.0/16.0 33.4/38.4 49.1/55.4 50/60 45/51 128/128
15.8/21.0 43.8/50.5 62.1/70.5 70/80** 57/65 128/128
19.9/26.5 55.2/63.8 76.4/87.1 80/90** 70/80 128/128
ALT 5.2
—/— —/— 26.6/26.6 35/35 26/26 148/148
4.9/6.5 13.6/15.6 26.6/26.6 35/35 26/26 148/148
7.9/10.5 21.9/25.3 33.9/38.1 35/40 31/35 148/148
12.0/16.0 33.4/38.4 48.2/54.6 50/60 44/50 148/148
15.8/21.0 43.8/50.5 61.2/69.6 70/70** 56/64 148/148
19.9/26.5 55.2/63.8 75.6/86.2 80/90** 70/79 148/148
HIGH 7.5
—/— —/— 28.9/28.9 35/35 29/29 174/174
4.9/6.5 13.6/15.6 28.9/28.9 35/35 29/29 174/174
7.9/10.5 21.9/25.3 36.7/40.9 40/45 34/38 174/174
12.0/16.0 33.4/38.4 51.1/57.4 60/60 47/53 174/174
15.8/21.0 43.8/50.5 64.1/72.5 70/80** 59/67 174/174
19.9/26.5 55.2/63.8 78.4/89.1 80/90** 72/82 174/174
460-3-60
STD
414 508 17.4 64 11/40.8
3.1
— — 13.2 20 13 71
6.0 7.2 13.2 20 13 72
11.5 13.8 21.2 25 19 72
14.0 16.8 24.9 25 23 72
23.0 27.7 38.5 40 35 72
25.0 30.1 41.5 45 38 72
ALT 2.6
— — 13.5 20 13 81
6.0 7.2 13.5 20 13 81
11.5 13.8 21.5 25 20 81
14.0 16.8 25.3 30 23 81
23.0 27.7 38.8 40 36 81
25.0 30.1 41.8 45 38 81
HIGH 3.4
— — 13.5 20 13 93
6.0 7.2 13.5 20 13 94
11.5 13.8 21.5 25 20 94
14.0 16.8 25.3 30 23 94
23.0 27.7 38.8 40 36 94
25.0 30.1 41.8 45 38 94

12 522 01 1001 01
Table 2A -- Electrical Data (Without Convenience Outlet)
PAE
UNIT
SIZE
NOMINAL
V-PH-Hz
IFM
TYPE
VOLT.
RANGE
COMPRESSOR
(ea) OFM (ea)
IFM
FLA
ELECTRIC HEAT POWER SUPPLY
DISCONNECT
SIZE†
Min Max Qty RLA LRA Qty Hp FLA
Nominal
kW FLA MCA MOCP* FLA LRA
060
208/230-3-60
STD
187 254 116 114 11/41.4
5.9
—/— —/— 27.3/27.3 35/35 27/27 128/128
4.9/6.5 13.6/15.6 27.3/27.3 35/35 27/27 128/128
7.9/10.5 21.9/25.3 34.7/38.9 40/40 32/36 128/128
12.0/16.0 33.4/38.4 49.1/55.4 50/60 45/51 128/128
15.8/21.0 43.8/50.5 62.1/70.5 70/80** 57/65 128/128
19.9/26.5 55.2/63.8 76.4/87.1 80/90** 70/80 128/128
ALT 5.2
—/— —/— 26.6/26.6 35/35 26/26 148/148
4.9/6.5 13.6/15.6 26.6/26.6 35/35 26/26 148/148
7.9/10.5 21.9/25.3 33.9/38.1 35/40 31/35 148/148
12.0/16.0 33.4/38.4 48.2/54.6 50/60 44/50 148/148
15.8/21.0 43.8/50.5 61.2/69.6 70/70** 56/64 148/148
19.9/26.5 55.2/63.8 75.6/86.2 80/90** 70/79 148/148
HIGH 7.5
—/— —/— 28.9/28.9 35/35 29/29 174/174
4.9/6.5 13.6/15.6 28.9/28.9 35/35 29/29 174/174
7.9/10.5 21.9/25.3 36.7/40.9 40/45 34/38 174/174
12.0/16.0 33.4/38.4 51.1/57.4 60/60 47/53 174/174
15.8/21.0 43.8/50.5 64.1/72.5 70/80** 59/67 174/174
19.9/26.5 55.2/63.8 78.4/89.1 80/90** 72/82 174/174
460-3-60
STD
414 508 17.4 64 11/40.8
3.1
— — 13.2 20 13 71
6.0 7.2 13.2 20 13 72
11.5 13.8 21.2 25 19 72
14.0 16.8 24.9 25 23 72
23.0 27.7 38.5 40 35 72
25.0 30.1 41.5 45 38 72
ALT 2.6
— — 13.5 20 13 81
6.0 7.2 13.5 20 13 81
11.5 13.8 21.5 25 20 81
14.0 16.8 25.3 30 23 81
23.0 27.7 38.8 40 36 81
25.0 30.1 41.8 45 38 81
HIGH 3.4
— — 13.5 20 13 93
6.0 7.2 13.5 20 13 94
11.5 13.8 21.5 25 20 94
14.0 16.8 25.3 30 23 94
23.0 27.7 38.8 40 36 94
25.0 30.1 41.8 45 38 94
072
208/230-3-60
STD
187 254 120.6 146 11/41.4
5.2
—/— —/— 32.4/32.4 40/40 31/31 180/180
4.9/ 6.5 13.6/15.6 32.4/32.4 40/40 31/31 180/180
7.9/10.5 21.9/25.3 33.9/38.1 35/40 31/35 180/180
12.0/16.0 33.4/38.4 48.2/54.6 50/60 44/50 180/180
15.8/21.0 43.8/50.5 61.2/69.6 70/70** 56/64 180/180
19.9/26.5 55.2/63.8 75.6/86.2 80/90** 70/79 180/180
HIGH 7.5
—/— —/— 34.7/34.7 40/40 34/34 205/205
4.9/ 6.5 13.6/15.6 34.7/34.7 40/40 34/34 205/205
7.9/10.5 21.9/25.3 36.7/40.9 40/45 34/38 205/205
12.0/16.0 33.4/38.4 51.1/57.4 60/60 47/53 205/205
15.8/21.0 43.8/50.5 64.1/72.5 70/80** 59/67 205/205
19.9/26.5 55.2/63.8 78.4/89.1 80/90** 72/82 205/205
460-3-60
STD
414 508 19.5 73 11/40.9
2.6
— — 15.4 20 15 90
6.0 7.2 15.4 20 15 90
11.5 13.8 20.5 25 19 90
14.0 16.8 24.3 25 22 90
23.0 27.7 37.8 40 35 90
25.5 30.7 41.6 45 38 90
HIGH 3.4
— — 16.2 20 16 103
6.0 7.2 16.2 20 16 103
11.5 13.8 21.5 25 20 103
14.0 16.8 25.3 30 23 103
23.0 27.7 38.8 40 36 103
25.5 30.7 42.6 45 39 103

13
522 01 1001 01
Table 2B -- Electrical Data (With Convenience Outlet)
PAE NOMINAL IFM
VOLTAGE
RANGE
COMPRESSOR
(ea) OFM (ea)
IFM
ELECTRIC HEAT POWER SUPPLY
DISCONNECT
SIZE†
Min Max Qty RLA LRA Qty Hp FLA Nominal
kW
FLA MCA MOCP* FLA LRA
036
208/230-3-60
STD
187 254 110.2 75 11/41.4
3.5
—/— —/— 22.5/22.5 30/30 23/23 90/ 90
3.3/ 4.4 9.2/10.6 22.5/23.0 30/30 23/23 90 90
4.9/ 6.5 13.6/15.6 27.3/29.4 30/30 25/28 90/ 90
6.5/ 8.7 18.1/20.9 33.1/36.0 35/40 30/34 90/ 90
7.9/10.5 21.9/25.3 37.7/42.0 40/45 35/39 90/ 90
12.2/16.0 33.4/38.4 52.1/57.9 60/60 48/54 90/ 90
ALT 4.9
—/— —/— 23.9/23.9 30/30 25/25 95/ 95
3.3/ 4.4 9.2/10.6 23.9/24.8 30/30 25/25 95/ 95
4.9/ 6.5 13.6/15.6 29.1/31.1 30/35 27/29 95/ 95
6.5/ 8.7 18.1/20.9 34.8/37.7 35/40 32/35 95/ 95
7.9/10.5 21.9/25.3 39.5/43.7 40/45 36/40 95/ 95
12.3/16.0 33.4/38.4 53.8/59.6 60/60 50/55 95/ 95
HIGH 5.2
—/— —/— 24.2/24.2 30/30 25/25 114/114
3.3/ 4.4 9.2/10.6 24.2/25.2 30/30 25/25 114/114
4.9/ 6.5 13.6/15.6 29.5/31.5 35/35 27/29 114/114
6.5/ 8.7 18.1/20.9 35.2/38.1 40/40 32/36 114/114
7.9/10.5 21.9/25.3 39.9/44.1 40/45 37/41 114/114
12.3/16.0 33.4/38.4 54.2/60.0 60/60 50/56 114/114
460-3-60
STD
414 508 14.4 40 11/40.8
1.3
— — 9.8 15 10 47
6.0 7.2 13.4 15 12 47
8.8 10.6 17.6 20 16 47
11.5 13.8 21.6 25 20 47
14.0 16.8 25.4 30 23 47
ALT 2.1
— — 10.6 15 11 50
6.0 7.2 14.4 15 13 50
8.8 10.6 18.6 20 17 50
11.5 13.8 22.6 25 21 50
14.0 16.8 26.4 30 24 50
HIGH 2.6
— — 11.1 15 11 59
6.0 7.2 15.0 20 14 59
8.8 10.6 19.2 20 18 59
11.5 13.8 23.3 25 21 59
14.0 16.8 27.0 30 25 59
048
208/230-3-60
STD
187 254 115.4 90 11/41.4
3.5
—/— —/— 29.0/29.0 35/35 29/29 106/106
4.9/ 6.5 13.6/15.6 29.0/29.4 35/35 29/29 106/106
6.5/ 8.7 18.1/20.9 33.1/36.0 35/40 30/34 106/106
12.0/16.0 33.4/38.4 52.1/57.9 60/60 48/54 106/106
15.8/21.0 43.8/50.5 65.1/73.5 70/80
**
60/68 106/106
ALT 4.9
—/— —/— 30.4/30.4 35/35 30/30 110/110
4.9/ 6.5 13.6/15.6 30.4/31.1 35/35 30/30 110/110
6.5/ 8.7 18.1/20.9 34.8/37.7 35/40 32/35 110/110
12.0/16.0 33.4/38.4 53.8/59.6 60/60 50/55 110/110
15.8/21.0 43.8/50.5 66.9/75.3 70/80
**
62/69 110/110
HIGH 5.2
—/— —/— 30.7/30.7 35/35 31/31 129/129
4.9/ 6.5 13.6/15.6 30.7/31.5 35/35 31/31 129/129
6.5/ 8.7 18.1/20.9 35.2/38.1 40/40 32/36 129/129
12.0/16.0 33.4/38.4 54.2/60.0 60/60 50/56 129/129
15.8/21.0 43.8/50.5 67.2/75.7 70/80
**
62/70 129/129
460-3-60
STD
414 508 18.3 45 11/40.8
1.8
— — 15.2 20 15 53
6.0 7.2 15.2 20 15 53
11.5 13.8 22.3 25 20 53
14.0 16.8 26.0 30 24 53
23.0 27.7 39.6 40 36 53
ALT 2.1
— — 15.5 20 15 55
6.0 7.2 15.5 20 15 55
11.5 13.8 22.6 25 21 55
14.0 16.8 26.4 30 24 55
23.0 27.7 39.9 40 37 55
HIGH 2.6
— — 16.0 20 16 64
6.0 7.2 16.0 20 16 64
11.5 13.8 23.3 25 21 64
14.0 16.8 27.0 30 25 64
23.0 27.7 40.6 45 37 64

14 522 01 1001 01
Table 2B -- Electrical Data (With Convenience Outlet)
PAE NOMINAL IFM
VOLTAGE
RANGE
COMPRESSOR
(ea) OFM (ea)
IFM
ELECTRIC HEAT POWER SUPPLY
DISCONNECT
SIZE†
Min Max Qty RLA LRA Qty Hp FLA Nominal
kW
FLA MCA MOCP* FLA LRA
060
208/230-3-60
STD
187 254 116 114 11/41.4
5.9
—/— —/— 32.1/32.1 40/40 32/32 133/133
4.9/6.5 13.6/15.6 32.1/32.4 40/40 32/32 133/133
7.9/10.5 21.9/25.3 40.7/44.4 45/45 37/41 133/133
12.0/16.0 33.4/38.4 55.1/60.9 60/70** 51/57 133/133
15.8/21.0 43.8/50.5 68.1/76.5 70/80** 63/70 133/133
19.9/26.5 55.2/63.8 82.4/92.5 90/00** 76/86 133/133
ALT 5.2
—/— —/— 31.4/31.4 40/40 32/32 153/153
4.9/6.5 13.6/15.6 31.4/31.5 40/40 32/32 153/153
7.9/10.5 21.9/25.3 39.9/43.5 40/45 37/41 153/153
12.0/16.0 33.4/38.4 54.2/60.0 60/60 50/56 153/153
15.8/21.0 43.8/50.5 67.2/75.7 70/80** 62/70 153/153
19.9/26.5 55.2/63.8 81.6/91.6 90/00** 75/85 153/153
HIGH 7.5
—/— —/— 33.7/33.7 40/40 34/34 179/179
4.9/6.5 13.6/15.6 33.7/34.4 40/40 34/34 179/179
7.9/10.5 21.9/25.3 42.7/46.4 45/50 39/43 179/179
12.0/16.0 33.4/38.4 57.1/62.9 60/70** 53/58 179/179
15.8/21.0 43.8/50.5 70.1/78.5 80/80** 65/72 179/179
19.9/26.5 55.2/63.8 84.4/94.5 90/00** 78/87 179/179
460-3-60
STD
414 508 17.4 64 11/40.8
3.1
— — 15.3 20 15 74
6.0 7.2 15.6 20 15 74
11.5 13.8 23.9 25 22 74
14.0 16.8 27.6 30 25 74
23.0 27.7 41.2 45 38 74
25.0 30.1 44.2 45 41 74
ALT 2.6
— — 15.6 20 16 83
6.0 7.2 16.0 20 16 83
11.5 13.8 24.3 25 22 83
14.0 16.8 28.0 30 26 83
23.0 27.7 41.6 45 38 83
25.0 30.1 44.6 45 41 83
HIGH 3.4
— — 15.6 20 16 96
6.0 7.2 16.0 20 16 96
11.5 13.8 24.3 25 22 96
14.0 16.8 28.0 30 26 96
23.0 27.7 41.6 45 38 96
25.0 30.1 44.6 45 41 96
072
208/230-3-60
STD
187 254 120.6 146 11/41.4
5.2
—/— —/— 37.2/37.2 45/ 45 37/37 184/184
4.9/ 6.5 13.6/15.6 37.2/37.2 45/ 45 37/37 184/184
7.9/10.5 21.9/25.3 37.2/38.1 40/ 45 37/41 184/184
12.0/16.0 33.4/38.4 54.2/60.0 60/ 60 50/56 184/184
15.8/21.0 43.8/50.5 67.2/75.7 70/ 80** 62/70 184/184
19.9/26.5 55.2/63.8 81.6/91.6 90/100** 75/85 184/184
HIGH 7.5
—/— —/— 39.5/39.5 45/ 45 39/39 210/210
4.9/ 6.5 13.6/15.6 39.5/39.5 45/ 45 39/39 210/210
7.9/10.5 21.9/25.3 39.5/40.9 45/ 50 39/43 210/210
12.0/16.0 33.4/38.4 57.1/62.9 60/ 70** 53/58 210/210
15.8/21.0 43.8/50.5 70.1/78.5 80/ 80** 65/72 210/210
19.9/26.5 55.2/63.8 84.4/94.5 90/100** 78/87 210/210
460-3-60
STD
414 508 19.5 73 11/40.9
2.6
— — 17.6 20 17 92
6.0 7.2 17.6 20 17 92
11.5 13.8 20.5 25 21 92
14.0 16.8 27.0 30 25 92
23.0 27.7 40.6 45 37 92
25.5 30.7 44.3 45 41 92
HIGH 3.4
— — 18.4 25 18 105
6.0 7.2 18.4 25 18 105
11.5 13.8 21.5 25 22 105
14.0 16.8 28.0 30 26 105
23.0 27.7 41.6 45 38 105
25.5 30.7 45.3 50 42 105

Legend
FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM — Indoor (Evaporator) Fan Motor
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC — National Electrical Code
OFM — Outdoor (Condenser) Fan Motor
RLA — Rated Load Amps
*Used to determine minimum disconnect per NEC.
[Fuse or HACR circuit breaker.
NOTES
:1. In compliance with NEC requirements for multimotor and combination load
equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the
unit shall be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.
2. Unbalanced 3- Phase Supply Voltage Never operate a motor where a phase
imbalance in supply voltage is greater than 2%. Use the following formula to determine
the percent of
N
% Voltage Imbalance
max voltage deviation from average voltage
= 100 x average voltage
EXAMPLE: Supply voltage is 460--3--60.
AB = 452 v
BC = 464 v
AC = 455 v
452 + 464 + 455
Average Voltage =
3
1371
=3
= 457
Determine maximum deviation from average voltage.
Maximum deviation is 7 v.
Determine percent voltage imbalance.
7
% Voltage Imbalance = 100 x 457 = 1.53%
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
IMPORTANT : If the supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately .
LEGENDS AND NOTES
(AB) 457 -- 452 = 5 V
(BC) 464 -- 457 = 7 V
(AB) 457 -- 455 = 2 V
3. power exhaust MCA and MOCP. Check MCA and MOCP when
power exhaust is powered through the unit (must be in accordance
with NEC and/or local codes). Determine the new MCA including the
power exhaust using the following formula:
MCA New = MCA unit only + MCA of Power Exhaust
15
522 01 1001 01
POWER EXHAUST
PART NO.
MCA
(230 v)
MCA
(460 v)
MCA
(575 v)
MOCP (for
separate
power source)
DNPWREXH021A01 N/A 0.9 N/A 15

16 522 01 1001 01
Step 6—ADJUST FACTORY INSTALLED OPTIONS
Manual Outdoor--Air Damper
Assembly:
1. Determine quantity of ventilation required for building.
Record amount for use in Step 8.
2. Removeand save outdoor air opening panel and screws.
See Fig. 10.
3. Separate hood and screen from basepan by removing the
4 screws securing them. Save all screws.
4. Replace evaporator coil access panel.
5. Place hood on front of outdoor air opening panel. See Fig.
11 for hood details. Secure top of hood with the 4 screws
removed in Step 3. See Fig. 12.
6. Remove and save 6 screws (3 on each side) from sides of
the manual outdoor--air damper.
7. Align screw holes on hood with screw holes on side of
manual outdoor--air damper. See Fig. 11 and 12. Secure
hood with 6 screws from Step 6.
8. Adjust minimum position setting of the damper blade by
adjusting the manual outdoor--air adjustment screws on
the front of the damper blade. See Fig. 10. Slide blade
vertically until it is in the appropriate position determined by
Fig. 13. Tighten screws.
9. Remove and save screws currently on sides of hood. Insert
screen. Secure screen to hood using the screws. See Fig.
12.
FIGURE 10 Damper Panel with Manual Outdoor--Air
Damper Installed
OUTDOOR
AIR OPENING
PANEL
3 SCRREWS
(SIDE)
Optional Economizer
See Figure 14 for Economizer component locations.
NOTE: These instructions are for installing the optional
economizer only. Refer to the accessory economizer
installation instructions when field installing an economizer
accessory.
1. To remove the existing unit filter access panel, raise the
panel and swing the bottom outward. The panel is now
disengaged from the track and can be removed. See Fig.
15.
FIGURE 11 Outdoor Air Hood Details
FIGURE 12 Outdoor Air Damper with Hood Attached
FIGURE 13 Outdoor Air Damper Position Sitting

17
522 01 1001 01
2. The box with the economizer hood components is shipped
in the compartment behind the economizer. The
economizer controller is mounted on top of the economizer
in the position shown in Fig. 14. The optional economizer
with 4 to 20 mA actuator signal control does not include the
economizer controller. To remove the component box from
its shipping position, remove the screw holding the hood
box bracket to the top of the economizer. Slide the hood
box out of the unit. See Fig. 16.
IMPORTANT: If the power exhaust accessory is to be installed
on the unit, the hood shipped with the unit will not be used and
must be discarded. Save the aluminum filter for use in the
power exhaust hood assembly.
3. The indoor coil access panel will be used as the top of the
hood. Remove the screws along the sides and bottom of
the indoor coil access panel. See Fig. 17.
4. Swing out indooroil access panel and insert the hood sides
under the panel (hood top). Use the screws provided to
attach the hood sides to the hood top and unit. Fig. 18.
5. Remove the shipping tape holding the economizer
barometric relief damper in place.
6. Insert the hood divider between the hood sides. See Fig. 18
and 19. Secure hood divider with 2 screws on each hood
side. The hood divider is also used as the bottom filter rack
for the aluminum filter.
7. Open the filter clips which are located underneath the hood
top. Insert the aluminum filter into the bottom filter rack
(hood divider). Push the filter into position past the open
filter clips. Close the filter clips to lock the filter into place.
See Fig. 19.
8. Caulk the ends of the joint between the unit top panel and
the hood top. See Fig. 17.
9. Replace the filter access panel.
10. Install all economizer accessories. Economizer wiring is
shown in Fig. 20.
Barometric flow capacity is shown in Fig. 21. Outdoor air
leakage is shown in Fig. 22. Return air pressure drop is shown
in Fig. 23.
FIGURE 14 Economizer Component Locations
FIGURE 15 Typical Access Panel Locations
FIGURE 16 Hood Box Removal
FIGURE 17 Indoor Coil Access Panel Relocation

18 522 01 1001 01
FIGURE 18 Outdoor Air Hood Construction FIGURE 19 Filter Installation
FIGURE 20 Economizer Wiring
Economizer
Board

19
522 01 1001 01
FIGURE 21 Barametric Flow Capacity
FIGURE 22 Outdoor Air Damper Leakage
FIGURE 23 Return Air Pressure Drop
Economizer Stardard Sensors
Outdoor Air Temperature (OAT) Sensor
The outdoor air temperature sensor (HH57AC074) is a 10 to 20
mA device used to measure the outdoor--air temperature. The
outdoor--air temperature is used to determine when the
economizer can be used for free cooling. The sensor is
factory--installed on the economizer in the outdoor airstream.
See Fig. 14. The operating range of temperature measurement
is 40 to 100 F.
Supply Air Temperature (SAT) Sensor
The supply air temperature sensor is a 3 K thermistor located
at the inlet of the indoor fan. See Fig. 24. This sensor is factory
installed. The operating range of temperature measurement is
0 to 158 F. See Table 3 for sensor temperature/resistance
values.
The temperature sensor looks like an eyelet terminal with wires
running to it. The sensor is located in the “crimp end” and is
sealed from moisture.
Outdoor Air Lockout Sensor
The economizer is equipped with an ambient temperature
lockout switch located in the outdoor air stream which is used
to lockout the compressors below a 42 F ambient temperature.
See Fig. 14.
Table 3 -- Supply Air Sensor
Temperature/Resistance Values
TEMPERATURE (F) RESISTANCE (ohms)
–58 200,250
–40 100,680
–22 53,010
–4 29,091
14 16,590
32 9,795
50 5,970
68 3,747
77 3,000
86 2,416
104 1,597
122 1,080
140 746
158 525
176 376
185 321
194 274
212 203
230 153
248 116
257 102
266 89
284 70
302 55
Economizer Control Modes
Determine the economizer control mode before set up of the
control. Some modes of operation may require different
sensors. Refer to Table 4. The economizer is supplied from the
factory with a supply air temperature sensor and an outdoor air
temperature sensor. This allows for operation of the
economizer with outdoor air dry bulb changeover control.
Additional accessories can be added to allow for different types
of changeover control and operation of the economizer and
unit.
Outdoor Dry Bulb Changeover
The standard controller is shipped from the factory configured
for outdoor dry bulb changeover control. The outdoor air and
supply air temperature sensors are included as standard. For
this control mode, the outdoor temperature is compared to an
adjustable set point selected on the control. If the outdoor--air
temperature is above the set point, the economizer will adjust
the outdoor air dampers to minimum position. If the outdoor--air
temperature is below the set point, the position of the outdoor
air dampers will be controlled to provide free cooling using
outdoor air. When in this mode, the LED next to the free cooling
set point potentiometer will be on. The changeover
temperature set point is controlled by the free cooling set point
potentiometer located on the control. See Fig. 25. The scale on
the potentiometer is A, B, C, and D. See Fig. 26 for the
corresponding temperature changeover values.

20 522 01 1001 01
Differential Dry Bulb Control
For differential dry bulb control the standard outdoor dry bulb
sensor is used in conjunction with an additional accessory dry
bulb sensor (part number DNTEMPSN002A00). The
accessory sensor must be mounted in the return airstream.
See Fig. 27. Wiring is provided in the economizer wiring
harness. See Fig. 20.
In this mode of operation, the outdoor air temperature is
compared to the return air temperature and the lower
temperature air stream is used for cooling. When using this
mode of changeover control, turn the enthalpy setpoint
potentiometer fully clockwise to the D setting. See Fig. 25.
Outdoor Enthalpy Changeover
For enthalpy control, accessory enthalpy sensor (part number
HH57AC078) is required. Replace the standard outdoor dry
bulb temperature sensor with the accessory enthalpy sensor in
the same mounting location. See Fig. 14. When the outdoor air
enthalpy rises above the outdoor enthalpy changeover set
point, the outdoor--air damper moves to its minimum position.
The outdoor enthalpy changeover set point is set with the
outdoor enthalpy set point potentiometer on the economizer
controller. The set points are A, B, C, and D. See Fig. 28. The
factory--installed 620--ohm jumper must be in place across
terminals SR and SR+ on the economizer controller. See Fig.
14 and 29.
Differential Enthalpy Control
For differential enthalpy control, the economizer controller
uses two enthalpy sensors (HH57AC078 and
CRENTDIF004A00), one in the outside air and one in the return
air duct. The economizer controller compares the outdoor air
enthalpy to the return air enthalpy to determine economizer
use. The controller selects the lower enthalpy air (return or
outdoor) for cooling. For example, when the outdoor air has a
lower enthalpy than the return air, the economizer opens to
bring in outdoor air for free cooling.
FIGURE 24 Supply Air Sensor Location
FIGURE 25 Economizer Controller Potentiometer
and LED Locations
FIGURE 26 Outdoor Air Temperature Changeover
Set Points
FIGURE 27 Return Air Temperature or Enthalpy
Sensor Mounting Location
Economizer
Controller
Economizer
Replace the standard outside air dry bulb temperature sensor
with the accessory enthalpy sensor in the same mounting
location. See Fig. 14. Mount the return air enthalpy sensor in
the return air duct. See Fig. 27. Wiring is provided in the
economizer wiring harness. See Fig. 20. The outdoor enthalpy
changeover set point is set with the outdoor enthalpy set point
potentiometer on the economizer controller. When using this
mode of changeover control, turn the enthalpy set point
potentiometer fully clockwise to the D setting.