Carrier FAS150 Dimensions and installation guide

FASFHS150-180-01SI 2-23
Installation, Start-up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . 1
PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . 2
Moving and Storage . . . . . . . . . . . . . . . . . . . . . . 2
Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Uncrating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . 10
Unit Positioning . . . . . . . . . . . . . . . . . . . . . . . . 10
Unit Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . 11
Refrigerant Piping Access . . . . . . . . . . . . . . . . 11
Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . 14
Fan Motors and Drives . . . . . . . . . . . . . . . . . . . . 15
Power Supply and Wiring . . . . . . . . . . . . . . . . . . 15
• THREE STAGE OPERATION
• FREEZE PROTECTION
Variable Frequency Drive . . . . . . . . . . . . . . . . . 18
Connecting Ductwork . . . . . . . . . . . . . . . . . . . . 20
• DISCHARGE CONNECTIONS
• RETURN CONNECTIONS
• OUTDOOR-AIR INLET CONNECTIONS
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . 21
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
FAS/FHS ONLY . . . . . . . . . . . . . . . . . . . . . . . . . 22
Adjusting TXV for Superheat (FAS/FHS only) 22
Compressor Rotation . . . . . . . . . . . . . . . . . . . . 22
Indoor Fan Motor . . . . . . . . . . . . . . . . . . . . . . . 22
Cooling with 2-Speed Indoor Fan Motor
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
• FIRST STAGE (Y1)
• SECOND STAGE (Y2)
• THIRD STAGE (Y3) — 3-STAGE SYSTEMS ONLY
Operating Fan for Test and Balance . . . . . . . . 23
Fan Speed Set Up . . . . . . . . . . . . . . . . . . . . . . . 23
• UNITS WITH ELECTRO-MECHANICAL CONTROLS
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . 24
Quarterly Inspection
(and 30 days after initial start) . . . . . . . . . . . 24
• INDOOR SECTION
Seasonal Maintenance . . . . . . . . . . . . . . . . . . . 24
• AIR CONDITIONING
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Fan Motor Lubrication . . . . . . . . . . . . . . . . . . . 25
Fan Shaft Bearings . . . . . . . . . . . . . . . . . . . . . . 25
Centering Fan Wheel . . . . . . . . . . . . . . . . . . . . 25
Fan Shaft Position Adjustment . . . . . . . . . . . . 25
Individual Fan Wheel Adjustment . . . . . . . . . . 25
Fan Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Fan Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Fan Pulley Alignment . . . . . . . . . . . . . . . . . . . . 26
Pulley and Drive Adjustment . . . . . . . . . . . . . . 27
Variable Frequency Drive . . . . . . . . . . . . . . . . 32
• INDOOR FAN MOTOR
• VFD FUSES
• FAN FAULT DETECTION
• VFD ALARMS AND FAULTS TROUBLESHOOTING
•ALARMS
• CLEAR THE ALARM LED
•FAULTS
• VFD MAINTENANCE
• HEAT SINK CLEANING
Bypass the VFD . . . . . . . . . . . . . . . . . . . . . . . . 36
Condensate Drains . . . . . . . . . . . . . . . . . . . . . . 36
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . 36
Coil Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Cleaning Cooling Coil . . . . . . . . . . . . . . . . . . . 36
Cleaning Insulation . . . . . . . . . . . . . . . . . . . . . 36
Replacing Filters . . . . . . . . . . . . . . . . . . . . . . . 37
APPENDIX A — VFD PARAMETERS . . . . . . . 38
START-UP CHECKLIST. . . . . . . . . . . . . . . . . CL-1
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical
components. Only trained and qualified service personnel
should install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance
functions of cleaning coils and filters and replacing filters. All
other operations should be performed by trained service
personnel. When working on air-conditioning equipment,
observe precautions in the literature, tags and labels
attached to the unit, and other safety precautions that may
apply.
Follow all safety codes, including ANSI (American National
Standards Institute) Z223.1. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations. Have
fire extinguisher available for all brazing operations.
It is important to recognize safety information. This is the
safety-alert symbol . When you see this symbol on the
unit and 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 severe personal injury or death.
WARNING signifies hazards which could result in personal
injury or death. CAUTION is used to identify unsafe
FAS/FHS150-180
Packaged Air-Handling Units
with R-410A Refrigerant
60 Hz

2Specifications subject to change without notice. FASFHS150-180-01SI
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.
PRE-INSTALLATION
1. The power supply (v, ph, and Hz) must correspond to
that specified on unit rating plate.
2. The electrical supply provided by the utility must be suf-
ficient to handle load imposed by this unit.
3. Refer to Installation, General section (page 2) and
Fig. 1 for locations of electrical inlets, condensate drain,
duct connections, and required clearances before set-
ting unit in place.
4. This installation must conform with local building codes
and with the NEC (National Electrical Code) or ANSI
(American National Standards Institute)/NFPA (National
Fire Protection Association) latest revision. Refer to
provincial and local plumbing or wastewater codes and
other applicable local codes.
Moving and Storage
To transfer unit from truck to storage site, use a fork truck.
Do not stack units more than 2 high during storage. If unit is
to be stored for more than 2 weeks before installation,
choose a level, dry storage site free from vibration. Do not
remove plastic wrap or skid from unit until final installation.
Rigging
All FAS/FHS Series units can be rigged by using the ship-
ping skid. Units are shipped fully assembled. Do not remove
shipping skids or protective covering until unit is ready for fi-
nal placement; damage to bottom panels can result. Use
slings and spreader bars as applicable to lift unit.
INSTALLATION
General
Allow the following clearances for service access and
airflow:
• Rear: 2-1/2 ft (762 mm) [2-1/2 ft (762 mm) with elec-
tric heat accessory]
• Front: 2-1/2 ft (762 mm)
• Right Side: 3-1/2 ft (1067 mm)
• Left Side: 2-1/2 ft (762 mm)
For units equipped with an economizer, refer to the acces-
sory installation instructions for additional clearance require-
ments. Be sure floor, wall, or ceiling can support unit weight
(Tables 1-4). See Fig. 1 for dimensions.
Uncrating
Move unit as near as possible to final location before remov-
ing shipping skid.
Remove metal banding, top skid, and plastic wrap. Examine
unit for shipping damage. If shipping damage is evident, file
claim with transportation agency. Remove base skid just pri-
or to actual installation.
Check nameplate information against available power sup-
ply and model number description in Fig. 2.
NOTE: Be sure to remove the Styrofoam™1 shipping pad
from the thermostatic expansion valve (TXV). Verify that it
has been removed. (See Fig. 3.)
Accessories
Refer to instructions shipped with each accessory for specif-
ic information.
DANGER
ELECTRICAL SHOCK HAZARD
Failure to follow this warning will result in personal injury
or death.
Before performing service or maintenance operations
on unit, turn off main power switch to unit and install
lock(s) and lockout tag(s). Ensure electrical service to
rooftop unit agrees with voltage and amperage listed on
the unit rating plate. Unit may have more than one
power switch.
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal
injury, death and/or equipment damage.
R-410A refrigerant systems operate at higher pressures
than standard R-22 systems. Do not use R-22 service
equipment or components on R-410A refrigerant
equipment.
WARNING
PERSONAL INJURY AND ENVIRONMENTAL
HAZARD
Failure to follow this warning could cause personal injury
or death.
Relieve pressure and recover all refrigerant before
system repair or final unit disposal.
Wear safety glasses and gloves when handling
refrigerants. Keep torches and other ignition sources
away from refrigerants and oils.
CAUTION
CUT HAZARD
Failure to follow this caution may result in personal
injury.
Sheet metal parts may have sharp edges or burrs. Use
care and wear appropriate protective clothing, safety
glasses, and gloves when handling parts and servicing
units.
CAUTION
UNIT OPERATION HAZARD
Failure to follow this caution could cause equipment
damage.
Ensure voltage listed on unit data plate agrees with
electrical supply provided for the unit.
1. Third-party trademarks and logos are the property of their respective
owners.

FASFHS150-180-01SI Specifications subject to change without notice. 3
Fig. 1 — Dimensions — Size 150 and 180

4Specifications subject to change without notice. FASFHS150-180-01SI
Fig. 1 —Dimensions — Size 150 and 180 (cont)

FASFHS150-180-01SI Specifications subject to change without notice. 5
Fig. 2 — Model Number Nomenclature
MODEL SERIES
Position Number
Type
Voltage1
Fan Motor Options
Indoor Coil
2 = Two Speed Fan Controller (VFD)
A = None (unpainted)
B = Painted cabinet
A = Standard
Painted Cabinet Options
A = Al/Cu
Controls
U = Electromechanical Unit Control Board
Efficiency
150 = 12.5 Tons (2 circuit) (FAS units only)
180 = 15 Tons (2 circuit)
H = 208/230-3-60
L = 460-3-60
S = 575-3-60
A = Standard Coil (FAS, DX (Direct Expansion) coil; FHS, heat pump coil)
A = Standard Static Standard Efficiency Motor / Standard Drive
B = High (Alternate) Static Standard or High Efficiency Motor / High Drive2
F = R-410A Fan Coil Unit
A = Air Conditioning (Cooling Only)
H = Heat Pump
S = Standard Efficiency
Nominal Tonnage
Coil Type
Indoor Fan Speed Controller
1234567891011121314
1
There are no multi-voltage units with the optional 2-speed indoor fan motor / VFD controller. VFD controllers are dedicated voltage devices
for 208/230v, 460v, and 575v.
2For FAS, standard efficiency on size 150, voltages 208-230v and 460v. High efficiency on size 180, as well as size 150, 575v.
For FHS, high efficiency only.
Packaging
FAS150HAAA2AUA

6Specifications subject to change without notice. FASFHS150-180-01SI
Table 1 — FAS150-180 Physical Data, English — Cooling Units
UNIT FAS 150 180
NOMINAL CAPACITY (tons) 12-1/2 15
OPERATING WEIGHT (lb)
Base Unit with TXV 695 713
Plenum 225 225
FANS
Qty...Diam. (in.) 2...15 2...15
Nominal Airflow (cfm) 5000 6000
Airflow Range (cfm) 3750-6250 4500-7500
Nominal Motor Hp (Standard Motor)
208/230-3-60 and 460-3-60 2.9 3.7
575-3-60 3.0 3.0
Motor Speed (rpm)
208/230-3-60 and 460-3-60 1725 1725
575-3-60 1725 1725
REFRIGERANT R-410A R-410A
Operating Charge (lb) (approx per circuit)a
NOTE(S):
a Units are shipped without refrigerant charge.
2.0/2.0 2.5/2.5
DIRECT EXPANSION COIL Enhanced Copper Tubes,
Aluminum Sine-Wave Fins
Enhanced Copper Tubes,
Aluminum Sine-Wave Fins
Max Working Pressure (psig) 650 650
Face Area (sq ft) 13.25 17.67
No. of Splits 22
No. of Circuits per Split 12 16
Split Type...Percentage Face...50/50 Face...50/50
Rows...Fins/in. 4...15 4...15
PIPING CONNECTIONS
Quantity...Size (in.)
DX Coil — Suction (ODF) 2...1-1/8 2...1-1/8
DX Coil — Liquid Refrigerant (ODF) 2...5/8 2...5/8
Steam Coil, In (MPT) 1...2-1/2 1...2-1/2
Steam Coil, Out (MPT) 1…1-1/2 1…1-1/2
Hot Water Coil, In (MPT) 1...2 1...2
Hot Water Coil, Out (MPT) 1...2 1...2
Condensate (PVC) 1...1-5/8 ODM / 1-1/4 IDF 1...1-5/8 ODM / 1-1/4 IDF
FILTERS Throwaway — Factory Supplied Throwaway — Factory Supplied
Quantity...Size (in.) 4...16 x 20 x 2 4...16 x 20 x 2
4...16 x 24 x 2 4...16 x 24 x 2
Access Location Either Side Either Side
STEAM COILb
b Field-installed accessory only.
Max Working Pressure (psig at 260°F) 20 20
Total Face Area (sq ft) 13.33 13.33
Rows...Fins/in. 1...10 1...10
HOT WATER COILb
Max Working Pressure (psig) 150 150
Total Face Area (sq ft) 13.33 13.33
Rows...Fins/in. 2...8.5 2...8.5
Water Volume
(gal) 13.9 13.9
(ft3)1.85 1.85
LEGEND
DX — Direct Expansion
IDF — Inside Diameter, Female
ODF — Outside Diameter, Female
ODM — Outside Diameter, Male
TXV — Thermostatic Expansion Valve

FASFHS150-180-01SI Specifications subject to change without notice. 7
Table 2 — FAS150-180 Physical Data, SI — Cooling Units
UNIT FAS 150 180
NOMINAL CAPACITY (kW) 43 52
OPERATING WEIGHT (kg)
Base Unit with TXV 315 323
Plenum 102 102
FANS
Qty...Diam. (mm) 2...381 2...381
Nominal Airflow (L/s) 2360 2831
Airflow Range (L/s) 1770-2949 2124-3539
Nominal Motor Hp (Standard Motor)
208/230-3-60 and 460-3-60 2.16 2.16
575-3-60 2.24 2.24
Motor Speed (r/s)
208/230-3-60 and 460-3-60 28.8 28.8
575-3-60 28.8 28.8
REFRIGERANT
Operating Charge (kg) (approx per circuit)a
NOTE(S):
a Units are shipped without refrigerant charge.
0.90/0.90 1.13/1.13
DIRECT EXPANSION COIL Enhanced Copper Tubes,
Aluminum Sine-Wave Fins
Enhanced Copper Tubes,
Aluminum Sine-Wave Fins
Max Working Pressure (kPag) 4481 4481
Face Area (sq m) 0.93 1.64
No. of Splits 22
No. of Circuits per Split 12 16
Split Type...Percentage Face...50/50 Face...50/50
Rows...Fins/m 4...591 4...591
PIPING CONNECTIONS
Quantity...Size (in.)
DX Coil — Suction (ODF) 2...1-1/8 2...1-1/8
DX Coil — Liquid Refrigerant (ODF) 2...5/8 2...5/8
Steam Coil, In (MPT) 1...2-1/2 1...2-1/2
Steam Coil, Out (MPT) 1…1-1/2 1…1-1/2
Hot Water Coil, In (MPT) 1...2 1...2
Hot Water Coil, Out (MPT) 1...2 1...2
Condensate (PVC) 1...1-5/8 ODM / 1-1/4 IDF 1...1-5/8 ODM / 1-1/4 IDF
FILTERS Throwaway — Factory Supplied Throwaway — Factory Supplied
Quantity...Size (mm) 4...406 x 508 x 51 4...406 x 508 x 51
4...406 x 610 x 51 4...406 x 610 x 51
Access Location Either Side Either Side
STEAM COILb
b Field-installed accessory only.
Max Working Pressure (kPag at 126°C) 138 138
Total Face Area (sq m) 1.24 1.24
Rows...Fins/m 1...394 1...394
HOT WATER COILb
Max Working Pressure (kPag) 1034 1034
Total Face Area (sq m) 1.24 1.24
Rows...Fins/m 2...335 2...335
Water Volume
(L) 52.6 52.6
(m3)0.052 0.052
LEGEND
DX — Direct Expansion
IDF — Inside Diameter, Female
ODF — Outside Diameter, Female
ODM — Outside Diameter, Male
TXV — Thermostatic Expansion Valve

8Specifications subject to change without notice. FASFHS150-180-01SI
Table 3 — FHS180 Physical Data, English — Heat Pump Units
UNIT FHS 180
NOMINAL CAPACITY (tons) 15
OPERATING WEIGHT (lb)
Base Unit with TXV 713
Plenum 225
FANS
Qty...Diam. (in.) 2...15
Nominal Airflow (cfm) 5625
Airflow Range (cfm) 4500-7500
Nominal Motor Hp (Standard Motor)
208/230-3-60 and 460-3-60 3.7
575-3-60 3.0
Motor Speed (rpm)
208/230-3-60 and 460-3-60 1725
575-3-60 1725
REFRIGERANT
Operating Charge (lb) (approx per circuit)a
NOTE(S):
a Units are shipped without refrigerant charge.
3.0/3.0
DIRECT EXPANSION COIL Enhanced Copper Tubes, Aluminum Sine-Wave Fins
Max Working Pressure (psig) 650
Face Area (sq ft) 16.56
No. of Splits 2
No. of Circuits per Split 10
Split Type...Percentage Face...50/50
Rows...Fins/in. 4...15
PIPING CONNECTIONS
Quantity...Size (in.)
DX Coil — Suction (ODF) 2...1-1/8
DX Coil — Liquid Refrigerant (ODF) 2...5/8
Steam Coil, In (MPT) 1...2-1/2
Steam Coil, Out (MPT) 1…1-1/2
Hot Water Coil, In (MPT) 1...2
Hot Water Coil, Out (MPT) 1...2
Condensate (PVC) 1...1-5/8 ODM / 1-1/4 IDF
FILTERS Throwaway — Factory Supplied
Quantity...Size (in.) 4...16 x 20 x 2
4...16 x 24 x 2
Access Location Either Side
STEAM COILb
b Field-installed accessory only.
Max Working Pressure (psig at 260°F) 20
Total Face Area (sq ft) 13.33
Rows...Fins/in. 1...10
HOT WATER COILb
Max Working Pressure (psig) 150
Total Face Area (sq ft) 13.33
Rows...Fins/in. 2...8.5
Water Volume
(gal) 13.9
(ft3)1.85
LEGEND
DX — Direct Expansion
IDF — Inside Diameter, Female
ODF — Outside Diameter, Female
ODM — Outside Diameter, Male
TXV — Thermostatic Expansion Valve

FASFHS150-180-01SI Specifications subject to change without notice. 9
Table 4 — FHS180 Physical Data, SI — Heat Pump Units
UNIT FHS 180
NOMINAL CAPACITY (kW) 52
OPERATING WEIGHT (kg)
Base Unit with TXV 323
Plenum 102
FANS
Qty...Diam. (mm) 2...381
Nominal Airflow (L/s) 2655
Airflow Range (L/s) 2124-3539
Nominal Motor Hp (Standard Motor)
208/230-3-60 and 460-3-60 2.76
575-3-60 2.24
Motor Speed (r/s)
208/230-3-60 and 460-3-60 28.8
575-3-60 28.8
REFRIGERANT
Operating Charge (kg) (approx per circuit)a
NOTE(S):
a Units are shipped without refrigerant charge.
1.36/1.36
DIRECT EXPANSION COIL Enhanced Copper Tubes, Aluminum Sine-Wave Fins
Max Working Pressure (kPag) 4482
Face Area (sq m) 1.54
No. of Splits 2
No. of Circuits per Split 10
Split Type...Percentage Face...50/50
Rows...Fins/m 4...591
PIPING CONNECTIONS
Quantity...Size (in.)
DX Coil — Suction (ODF) 2...1-1/8
DX Coil — Liquid Refrigerant (ODF) 2...5/8
Steam Coil, In (MPT) 1...2-1/2
Steam Coil, Out (MPT) 1…1-1/2
Hot Water Coil, In (MPT) 1...2
Hot Water Coil, Out (MPT) 1...2
Condensate (PVC) 1...1-5/8 ODM / 1-1/4 IDF
FILTERS Throwaway — Factory Supplied
Quantity...Size (mm) 4...406 x 508 x 51
4...406 x 610 x 51
Access Location Either Side
STEAM COILb
b Field-installed accessory only.
Max Working Pressure (kPag at 126°C) 138
Total Face Area (sq m) 1.24
Rows...Fins/m 1...394
HOT WATER COILb
Max Working Pressure (kPag) 1034
Total Face Area (sq m) 1.24
Rows...Fins/m 2...335
Water Volume
(L) 52.6
(m3)0.052
LEGEND
DX — Direct Expansion
IDF — Inside Diameter, Female
ODF — Outside Diameter, Female
ODM — Outside Diameter, Male
TXV — Thermostatic Expansion Valve

10 Specifications subject to change without notice. FASFHS150-180-01SI
Fig. 3 — Foam Block Location
Rated Indoor Airflow (cfm)
Tables 5-7 list the rated indoor airflow used for the AHRI
(Air-Conditioning, Heating, and Refrigeration Institute)
efficiency rating for the units covered in this document.
Unit Positioning
The unit can be mounted on the floor for vertical application
with return air entering the face of the unit and supply air
discharging vertically through the top of the unit. The unit
can also be applied in a horizontal arrangement with return
air entering horizontally and the supply air discharging hori-
zontally. When applying the unit in a horizontal arrange-
ment, ensure the condensate drain pan is located at the bot-
tom center of the unit for adequate condensate disposal.
See Fig. 4 for condensate connections for each unit
position.
Fig. 4 — Typical Unit Positioning
Typical positioning and alternate return air locations are
shown in Fig. 4. Alternate return air locations can be used
by moving the unit panel from the alternate return air loca-
tion to the standard return air location. Refer to overhead
suspension accessory drawing (see Fig. 5) for preferred
suspension technique. The unit needs support underneath
to prevent sagging.
Unit Isolation
Where extremely quiet operation is essential, install isola-
tors between floor and base of unit, or between ceiling and
top section of unit.
Be sure that unit is level and adequately supported. Use
channels at front and sides of unit for reference points when
leveling.
Fig. 5 — Preferred Suspension Technique
Table 5 — CAS****G/H/MN with FAS150-180
MODEL NUMBER FULL LOAD AIRFLOW (CFM)
CAS150G/H/M/N — FAS150 4400
CAS180G/H/M/N — FAS180 6000
Table 6 — CAS****T/U with FAS150-180
MODEL NUMBER FULL LOAD AIRFLOW (CFM)
CAS150T/U — FAS150 4400
CAS180T/U — FAS180 5625
Table 7 — CHS with FHS180
MODEL NUMBER FULL LOAD AIRFLOW (CFM)
CHS180 — FHS180 5625
TXV Coil
Remove Foam Block
LEGEND
TXV — Thermostatic Expansion Valve
IMPORTANT: Do NOT attempt to install unit with return air
entering top panel of unit. Condensate will not drain from
unit.
IMPORTANT: Do not bury refrigerant piping underground.
LEGEND
Accessory Line
Alternate Air Intake and Discharge
Air Intake and Discharge
Plug
Plug Condensate Drain
7' 11-1/2"
[2425.7]
REF
3/8" Threaded Rod
(Field-Supplied)
Overhead Suspension
Accessory with
Hot Water Coil
NOTE: Dimensions in [ ] are millimeters.

FASFHS150-180-01SI Specifications subject to change without notice. 11
Refrigerant Piping
See Tables 1-4 for refrigerant pipe connection sizes. For
ease in brazing, it is recommended that all internal solder
joints be made before unit is placed in final position.
The FAS/FHS direct-expansion units have internal factory-
installed thermostatic expansion valves (TXVs), distributors,
and nozzles for use with R-410A. See Table 8 for part num-
bers. Knockouts are provided in the unit corner posts for
FAS/FHS refrigerant piping. See Fig. 6, which also lists rec-
ommended knockouts and access holes to use for each
FAS/FHS unit size. Recommended fittings are listed in
Table 9.
The sensor bulb capillary tubes must be routed from the
TXVs inside the unit through one of the piping access holes.
Clamp the TXV sensor bulb on a vertical portion of the suc-
tion line, outside the unit. (See Fig. 7.)
Refrigerant Piping Access
The FAS/FHS series units come with standard knockouts
for refrigerant piping. These knockouts are located on both
sides of the unit for installation flexibility. The standard
knockouts provide sufficient access to the unit’s coils for all
FAS150 and 180 units. FHS180 units require additional
holes that must be field-fabricated to accommodate the pip-
ing. See Fig. 6 for the positions and dimensions of the
additional access holes required for 575J*16H units. Rec-
ommended access hole use is also listed for all units. Note
that Fig. 6 shows the access holes on the control-box side
of the unit; this is the side of the unit with the coil headers,
so it is used most often for piping access.
NOTE: Be sure to remove the Styrofoam™1 shipping pad
from the TXV. Verify that it has been removed. (See Fig. 3.)
The FAS/FHS series evaporator coils have a face-split de-
sign. Ensure that lower circuit of coil is first on/last off when
connected to the condensing unit and/or system controls.
(See Fig. 8.)
External TXV equalizer connections are provided and
factory-brazed into the coil suction manifolds.
If suction line must be horizontal, clamp bulb to suction line
at least 45 degrees above bottom, at approximately the
4 o’clock or 8 o’clock position. (See Fig. 9.)
1. Third-party trademarks and logos are the property of their respective
owners.
IMPORTANT: Never attach the sensor to the suction man-
ifold. Do NOT mount the sensor on a trapped portion of
the suction line.

12 Specifications subject to change without notice. FASFHS150-180-01SI
Fig. 6 — Refrigerant Piping Access Holes
Table 8 — Factory-Installed Nozzle and Distributor Dataa
NOTE(S):
a Hot gas bypass applications require field-supplied auxiliary side connector.
UNIT COIL TYPE STD TXV
QTY...PART NO.
DISTRIBUTOR
QTY... PART NO.
FEEDER TUBES PER
DISTRIBUTORb
QTY...SIZE (in.)
b Feeder tube size is 1/4 in. (6.35 mm).
NOZZLE
QTY...PART NO.
FAS150 4 Row 2...1178405
2...BBIZE— 5—GA
2...1178407
2...1113 12...3/16 2...1178409 2...G3
FAS180 4 Row 2...1178406
2...BBIZE— 6—GA
2...1178412
2...1136 16...3/16 2...1178410
2...G4
FHS180 4 Row 2...1183553
2...BBIZE— 8—GA
2...1178407
2...1113 10...3/16 2...1179769
2...G5
4
3
2
1
7
6
5
ABC
UNIT USE HOLE
NUMBERSa
FIELD-FABRICATED HOLE DIAMETERS
in. (mm)
FIELD-FABRICATED HOLE POSITION
DIMENSIONS, in. (mm)
NO. 5 NO. 6 NO.7 A B C
FAS150/180 1, 2, 3, 4 — — — — — —
FHS180 3b, 5, 6, 7 1-1/8 (28.6) 1-1/8 (28.6) 1-3/4 (44.5) 3.25 (82.6) 6.125 (155.6) 10.38 (263.7)
NOTE(S):
a Access hole knockouts 1-4 are factory-supplied.
b Must be enlarged from 1-1/8 in. (28.6 mm) to 1-3/4 in. (44.5 mm)

FASFHS150-180-01SI Specifications subject to change without notice. 13
Fig. 7 — Face-Split Coil and Liquid Line Piping (Typical)
Table 9 — Fitting Requirements
UNIT ACCESS HOLE NO.a
NOTE(S):
a See Fig. 7 for access hole location by number.
CONNECTION TYPE CIRCUIT FITTING REQUIREDb(in.)
b Fittings are listed in order from header or tee stub connection out to access hole in corner support post.
FAS150
1 Suction Lower
1-1/8 Street Elbow
1-1/8 Nipple, 7-5/8 L
1-1/8 Long Radius Elbow
2 Liquid Lower
5/8 Street Elbow
5/8 Nipple, 1-7/16 L
5/8 Long Radius Elbow
3 Liquid Upper
5/8 Street Elbow
5/8 Nipple, 11-1/2 L
5/8 Long Radius Elbow
4 Suction Upper
1-1/8 Nipple, 5-5/8 L
1-1/8 Long Radius Elbow
1-1/8 Nipple, 13 L
1-1/8 Long Radius Elbow
FAS180
1 Suction Lower
1-1/8 Street Elbow
1-1/8 Nipple, 72-3/4 L
1-1/8 Long Radius Elbow
2 Liquid Lower
5/8 Street Elbow
5/8 Nipple, 1-3/8 L
5/8 Long Radius Elbow
3 Liquid Upper
5/8 Street Elbow
5/8 Nipple, 11-1/2 L
5/8 Long Radius Elbow
4 Suction Upper
1-1/8 Nipple, 5-5/8 L
1-1/8 Long Radius Elbow
1-1/8 Nipple, 13 L
1-1/8 Long Radius Elbow
FHS180
3 Suction Lower 1-1/8 Nipple, 3 L
1-1/8 Long Radius Elbow
5 Suction Lower
5/8 Nipple, 2-7/8 L
5/8 45° Elbow
5/8 Nipple, 1-5/8 L
5/8 Long Radius Elbow
6 Liquid Upper
5/8 Nipple, 2-7/8 L
5/8 45° Elbow
5/8 Nipple, 4-1/4 L
5/8 Long Radius Elbow
7 Suction Upper
1-1/8 Nipple, 5 L
1-1/8 45° Elbow
1-1/8 Nipple, 8-3/4 L
1-1/8 Long Radius Elbow
LEGEND
TXV — Thermostatic Expansion Valve
NOTE: Component location arrangement shown for field installation of sight glasses, solenoid valves, filter driers, and TXV sensing bulbs.
The TXVs and equalizer lines are factory-installed.
UPPER
SPLIT
AIRFLOW
LOWER
SPLIT
AIRFLOW
15 DIAMS
MIN 10
DIAMS
8 DIAMS
MIN
TXV
SENSING
BULB
EQUALIZER LINE
SIGHT
GLASS
TXV
SOLENOID
VALVE
FILTER
DRIER
TXV
SENSING
BULB
TXV
8 DIAMS
MIN
15 DIAMS
MIN 10
DIAMS
INDOOR
COIL
EQUALIZER
LINE
Single Circuit Coil Piping Configuration - FAS/FHS 072, 091
For single compressor condensing units.
Dual Circuit Coil Piping Configuration - FAS/FHS 120-180
For single compressor condensing units
UPPER
SPLIT
AIRFLOW
15 DIAMS
MIN 10
DIAMS 8 DIAMS
MIN
TXV
SENSING
BULB
EQUALIZER LINE
SIGHT
GLASS
TXV
SOLENOID
VALVE
FILTER
DRIER

14 Specifications subject to change without notice. FASFHS150-180-01SI
Fig. 8 — Typical Evaporator Coil Connections
(FAS/FHS)
Fig. 9 — TXV Sensing Bulb Location
Condensate Drain
Install a trapped condensate drain line to unit connection as
shown in Fig. 10. The unit drain connection is a PVC stub.
(See Fig. 11.) Some areas may require an adapter to con-
nect to either galvanized steel or copper pipe. For these ap-
plications, install a field-supplied threaded PVC adapter.
NOTE: A trap must be installed in the condensate drain line
to ensure that the static pressure of fans is balanced with
the water column in the drain line and that condensate can
drain completely from pan. Without a trap, air can be drawn
up drain line until water level in condensate pan becomes
equal to static pressure created by fans, preventing com-
plete drainage. Conditions will worsen as filters become
dirty.
Install clean-out plugs in trap. Pitch drain line downward to
an open floor drain or sump. Provide service clearance
around drain line to permit removal of unit panels. Observe
all local sanitary codes.
As shipped, the unit’s condensate drain pan is NOT sloped
towards the drain connection. The pan slope must be
changed to pitch towards the side of the unit with the drain
connection. (See Fig. 11.) Loosen the 2 screws next to the
drain outlet at both ends of the unit, push drain pan down in
the slots near the drain connection, and up in the slots on
the opposite end. Re-tighten screws. The pan should have
a pitch of at least 1/4 in. over its length toward the drain
connection.
Fig. 10 — Condensate Drain
First On/Last Off = B
Vertical Installation
First On/Last Off = A
Horizontal Installation
AA
BB
Liquid Line
Connection
Liquid Line
Connection
Suction-Vapor
Connection
Suction-Vapor
Connection
Condensate
Drain
Connection
Condensate
Drain
Connection
AA
BB
Condensate Drain Connection
LEGEND
TXV — Thermostatic Expansion Valve
NOTE: The 8 o’clock position is shown above.
Vapor LineVapor Line
45°45°
StrapStrap
TVX BulbTVX Bulb
3” MIN.
[76]
NOTE: Dimensions in [ ] are in millimeters
PlugPlug
3" Min.
[76]
3" Min.
[76]
From
Condensate
Pan
From
Condensate
Pan
Existing Floor
Drain, Sink, or
Hopper
Existing Floor
Drain, Sink, or
Hopper Unit
Condensate
Conn
Unit
Condensate
Conn
TrapTrap
Not Less Than 18" [457]
Long and Two Sizes
Larger Than Waste Pipe
Not Less Than 18" [457]
Long and Two Sizes
Larger Than Waste Pipe
To SewerTo Sewer
1" Min.1" Min.
PlugPlug
PlugPlug
3" Min.
[76]
3" Min.
[76]
3" Min.
[76]
3" Min.
[76]
TrapTrap
[25][25]
PlugPlug

FASFHS150-180-01SI Specifications subject to change without notice. 15
Fig. 11 — Drain Pan Slope Adjustment
Fan Motors and Drives
Motor and drive packages are factory installed in all units. The
motor and drive packages consist of the following items:
1 — fan motor
1 — adjustable motor pulley
1 — fan pulley
2 — matched fan belts
(FAS150/180, FHS180 units)
For instructions on changing fan rotation, changing drive
speeds and adjusting drives, see “Pulley and Drive Adjust-
ment” on page 27.
Power Supply and Wiring
Check the unit data plate to ensure that available power supply
matches electrical characteristics of the unit. Provide a discon-
nect switch with an integrated lock-out feature of size required
to provide adequate fan motor starting current. See Table 10
for unit electrical data.
Example: Supply voltage is 230-3-60
Determine maximum deviation from average voltage.
(AB) 227-224 = 3 v
(BC) 231-227 = 4 v
(AC) 227-226 = 1 v
Maximum deviation is 4 v.
Determine percent of voltage imbalance.
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
Adjustment Slots
(Both Ends of Unit)
PVC Stub Unit
Drain Connection
Table 10 — Electrical Data — Two Speed Motorsa
NOTE(S):
a Installation with Accessory Electric Heaters: Size the Field Power Wiring between the heater TB1 and the FAS/FHS indoor fan motor per NEC Article 430-28 (1) or (2)
(depends on length of conduit between heater enclosure and FAS/FHS power entry location). Install wires in field-installed conduit.
UNIT VOLTAGE IFM
TYPE
VOLTAGE LIMITSb
b Motors are designed for satisfactory operation within 10% of normal voltage shown. Voltages should not exceed the limits shown in the Voltage Limits column.
FAN MOTOR POWER SUPPLYc
c Minimum circuit amps (MCA) and maximum overcurrent protection (MOCP) values are calculated in accordance with NEC Article 440.
Min Max Hp kW FLAd
d Motor FLA values are established in accordance with Underwriters Laboratories (UL). Standard 1995.
MCA MOCP
FAS150
208/230
STD 187 253 2.9 2.16 8.6 11.0 15
MED 187 253 2.9 2.16 8.6 11.0 15
HIGH 187 253 3.7 2.76 10.8 14.0 20
460
STD 414 506 2.9 2.16 3.8 5.0 15
MED 414 506 2.9 2.16 3.8 5.0 15
HIGH 414 506 3.7 2.76 4.9 7.0 15
575
STD 518 632 3.7 2.76 4.5 6.0 15
MED 518 632 3.7 2.76 4.5 6.0 15
HIGH 518 632 5.0 3.73 8.0 10.0 15
FAS180
FHS180
208/230
STD 187 253 3.7 2.76 10.8 14.0 20
MED 187 253 3.7 2.76 10.8 14.0 20
HIGH 187 253 5.0 3.73 18.0 23.0 40
460
STD 414 506 3.7 2.76 4.9 7.0 15
MED 414 506 3.7 2.76 4.9 7.0 15
HIGH 414 506 5.0 3.73 9.1 12.0 20
575
STD 518 632 3.7 2.76 4.5 6.0 15
MED 518 632 3.7 2.76 4.5 6.0 15
HIGH 518 632 5.0 3.73 8.0 10.0 15
% Voltage
Imbalance = 100 x max voltage deviation from average voltage
average voltage
AB = 224 v
BC = 231 v
AC = 226 v
Average Voltage = (224 + 231 + 226) =681 =227
33
ABC
MOTOR
% Voltage Imbalance = 100x 4=1.78%
227
IMPORTANT: If the supply voltage phase imbalance is more than 2%,
contact your local electric utility company immediately.
LEGEND
FLA — Full Load Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection

16 Specifications subject to change without notice. FASFHS150-180-01SI
Install disconnect switch and power wiring in accordance with
all applicable local codes. See Fig. 12-13 and the unit label di-
agram. For units with motor sizes less than 5 Hp (3.7 kW),
connect power wiring to unit with no. 10 ring terminal. For units
with motor sizes of 5 Hp (3.7 kW) or more, connect power wir-
ing with 1/4 in. ring terminal.
Fig. 12 — Wiring and Service Access
(Side Panel Removed)
The FAS/FHS size 150-180 units that have motors wired for
460 v, 3 ph, 60 Hz operation can be field-converted to 208/
230 v, 3 ph, 60 Hz operation. Rewire the motor according to
the diagram plate on the motor. After reconfiguring the motor,
mark the motor specifying 208 v or 230 v operation replacing
the 460 v sticker information on the units’ corner post.
Fan motors are factory-installed on all units.
The control box
(see Fig. 13) contains a Unit Control Board (UCB) that re-
ceives thermostat commands from the thermostat (through
the Thermostat Connection Board [TSTAT CB]) and outputs
these commands to the condensing unit (through the Indoor
Connection Board [IDCB]). The control box also contains a
high voltage terminal block and fuses that provide overcur-
rent protection to the Variable Frequency Drive.
Complete 24-v control circuit wiring. Wire the thermostat to
TSTAT CB terminal block (see Fig. 13), according to Fig. 14
and the unit label diagram. If the air handler is part of a split
system, complete the wiring from the condensing unit to
IDCB terminal block (see Fig. 13). Refer to Fig. 14 and the
unit label diagram.
THREE STAGE OPERATION
All units are factory shipped for 2-stage cooling operation.
To convert a unit to 3-stage operation, see Fig. 15 and ad-
just the following wires between the control board and two
terminal strips on the side of the control box:
1. Remove gray wire from Thermostat CB terminal X.
2. Move orange wire from Thermostat CB terminal Y2 to
terminal X.
3. Make connections of blue wire included in factory har-
ness. Connect one end to Thermostat CB terminal Y2
and the other to Indoor Connection Board terminal Y2.
4. Move orange wire from Indoor Connection Board termi-
nal Y2 to terminal X.
The 3-stage system will run the fan at low speed with a G,
Y1, and Y1+Y2 call, and at high speed with a call for Y1, Y2,
and Y3. A thermostat with 3 cooling stage capability is re-
quired for this system configuration.
Fig. 13 — Control Box (Cover Removed) (Typical)
FREEZE PROTECTION
On select models, there is a factory-installed and wired tem-
perature switch (P/N 1186852) to protect the compressor(s)
in the condensing unit when frost buildup is present on the
indoor coil. The temperature switch is used to prevent the
compressor(s) from turning on while the indoor coil is frost-
ed. Refer to the unit wiring label diagram for wiring of this
switch.
LEGEND
TXV —Thermostatic Expansion Valve
Control
Box
Fan Scroll
Fan
Drive
Pulley
Motor and
Drive
Wire
Access
Condensate
Drain
Connection
(Horizontal)
Coil
Filter
Elements TXV
Bulb
Access
Filter
Retainer
Clip
Refrigerant
Piping
Access
Condensate
Drain
Connection
(Vertical)
Indoor
Connection
Board
(IDCB)
Exit for
Low Voltage Wiring
Fuse
Block
and
Fuses
Ground
Lug
Unit
Control
Board
High
Voltage
Terminal
Block Exit for
Power Wiring
Thermostat
Connection
Board
(TSTAT CB)

FASFHS150-180-01SI Specifications subject to change without notice. 17
NOTE: On select units, the black and blue IFM wires are reversed.
Fig. 14 — Unit Wiring

18 Specifications subject to change without notice. FASFHS150-180-01SI
Fig. 15 — 3-Stage Cooling Diagram
Variable Frequency Drive
The unit is equipped with a Variable Frequency Drive (VFD)
to control the indoor fan in sequence with the unit's ventila-
tion, cooling, and heating operation. The VFD is controlled
through a 0-10vdc signal that is provided by the Unit Control
Board (UCB) in the control box. Per ASHRAE 90.1-2016
and IECC-2015 standards, during the first stage of cooling
operation, the VFD will adjust the fan motor to provide 66%
of the design airflow rate for the unit. When the call for the
second stage of cooling is required, the VFD will allow the
design airflow rate for the unit established (100%). During
heating mode, the VFD will allow total design airflow rate
(100%) operation. During ventilation mode, the VFD will op-
erate the fan motor at 66% of full speed.
The ABB ACS320 model (see Fig. 16) is used on 208/230v
and 460v units, while the ABB ACH550 model (see Fig. 17)
is used on 575v units.
See Fig. 18-19 for location of the VFD.
Fig. 16 — ACS320 Variable Frequency Drive (VFD)
DDC
TSTAT
Y1
Y2
X
Y1
Y2
X
UCB
COMP
BLU
BLU
BLU
BLU
ORN
BLU
ORN
ORN
TSTAT CB
IDCB
This wire is included in
factory harness
GRA
Disconnect this wire
from TSTAT CB-X and
insulate.

FASFHS150-180-01SI Specifications subject to change without notice. 19
Fig. 17 — ACH550 Variable Frequency Drive (VFD)
Fig. 18 — ACS320 VFD Location for the following units: FAS150/180, FHS180
(208/230V and 460V only)
Variable
Frequency
Drive (VFD)

20 Specifications subject to change without notice. FASFHS150-180-01SI
Fig. 19 — ACH550 VFD Location for the following units: FAS150/180, FHS180 (575V only)
Connecting Ductwork
Figure 20 shows recommended duct connection to units
with 2 fans.
DISCHARGE CONNECTIONS
Duct flanges are factory-supplied; they are shipped inside
the unit attached to the hairpin end of the coil tube sheet for
field installation. Using the existing screws, install the duct
flanges on the unit’s fan deck. Each fan discharge requires
2 flanges; each flange must be bent in the middle to con-
form to the discharge opening. (See Fig. 21.) After flanges
are installed, connect them to the supply duct using a can-
vas connection to prevent vibration. It is important that this
connection be properly fabricated to prevent high air friction
losses and air noise.
RETURN CONNECTIONS
When using return-air ductwork, route return-air duct to the
unit’s return air inlet near the filter rack, using a canvas con-
nection to prevent transmission of unit vibration. If the duct
blocks off the unit’s access panel, provide a slip joint in the
ductwork to permit removal for servicing.
OUTDOOR-AIR INLET CONNECTIONS
Connect outdoor-air inlet to field-installed accessory econo-
mizer. Refer to Economizer Installation Instructions.
Variable
Frequency
Drive (VFD)
CAUTION
UNIT OPERATION HAZARD
Failure to follow this caution could cause equipment
damage.
Do not operate unit without ductwork or discharge
plenum unless fan speed has been adjusted for external
static pressure of 0 in. wg. Failure to do so may result in
motor overload.