Arcoaire CHS180 User manual

Specifications are subject to change without notice. 506 01 2302 02 10/2019
INSTALLATION INSTRUCTIONS
R--410A Heat Pump Condensing Units
CHS180 -- 240
These instructions must be read and understood completely before attempting installation
Safety Labeling and Signal Words
DANGER, WARNING, CAUTION, and NOTE
The signal words DANGER, WARNING,
CAUTION,andNOTE are used to identify levels of
hazard seriousness. The signal word DANGER is
only used on product labels to signify an immediate
hazard. The signal words WARNING,CAUTION,
and NOTE will be used on product labels and
throughout this manual and other manual that may
apply to the product.
DANGER -- Immediate hazards which will result in
severe personal injury or death.
WARNING --Hazards or unsafe practices which
could result in severe personal injury or death.
CAUTION -- Hazards or unsafe practices which
may result in minor personal injury or product or
property damage.
NOTE -- Used to highlight suggestions which will
result in enhanced installation, reliability, or
operation.
!WARNING
Signal Words in Manuals
The signal word WARNING is used throughout
this manual in the following manner:
The signal word CAUTION is used throughout
this manual in the following manner:
!CAUTION
Signal Words on Product Labeling
Signal words are used in combination with
colors and/or pictures or product labels.
MODEL NOMENCLATURE 2....................
SAFETY CONSIDERATIONS 2..................
INSTALLATION GUIDELINE 3...................
INSTALLATION 8..............................
Step 1 -- Plan for Unit Location 8.................
Step 2 -- Complete Pre--Installation Checks 8......
Step3–PrepareUnitMountingSupport 9........
Step 4 -- Rig and Mount the Unit 9................
Step 5 -- Complete Refrigerant Piping Connections 9
Step 6 -- Install Accessories 13...................
Step 7 -- Complete Electrical Connections 13.......
PRE-START-UP 18..............................
START--UP 18..................................
OPERATING SEQUENCE 29.....................
ROUTINE SYSTEM MAINTENANCE 30...........
SERVICE 30...................................
TROUBLESHOOTING 42........................
START--UP CHECKLIST 51......................
TABLE OF CONTENTS
!WARNING
PERSONAL INJURY, AND/OR PROPERTY
DAMAGE HAZARD
Failure to carefully read and follow this warning
could result in equipment malfunction, property
damage, personal injury and/or death.
Installation or repairs made by unqualified
persons could result in equipment malfunction,
property damage, personal injury and/or death.
The information contained in this manual is
intended for use by a qualified service technician
familiar with safety procedures and equipped
with proper tools and test instruments.
Installation must conform with local building
codes and with the national Electrical Code
NFPA70 current edition or Canadian Electrical
Code part 1 CSA C.22.1.

250601230202
Specifications are subject to change without notice.
MODEL NOMENCLATURE
MODEL SERIES C H S 1 8 0 H A A 0 A 0 0 A
Position Number 12345678910 11 12 13 14
C = R--410A Condensing Unit
A = Air Conditioning (Cooling Only)
H=HeatPump Type
S = Standard ASHRAE 90.1--2010 Efficiency Efficiency
180 = 180,000 BTUH = 15 Tons (2 circuit)
240 = 240,000 BTUH = 20 Tons (2 circuit)
Nominal Cooling Capacity
H = 208/230--3--60
L = 460--3--60
S = 575--3--60 Voltage
D=DualCircuit
E = Dual Circuit w/ Low Ambient Control
Refrigerant System Options
A = Cu/Al Cond. RTPF
Outdoor Coil Options
0=None
1 = Non--powered 115v Convenience Outlet Service Options
A=None
C = Non--Fused Disconnect Switch Electrical Options
0 = Standard Elec--Mechanical Control Base Unit Controls
0 = No options, reserved for future Use Future Use
A = Original Design Sales Digit
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical
shock or other conditions which may cause personal injury or
property damage. Consult a qualified installer, service
agency, or your distributor or branch for information or
assistance. The qualified installer or agency must use
factory--authorized kits or accessories when modifying this
product. Refer to the individual instructions packaged with
the kits or accessories when installing.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloths for brazing operations and
have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions attached to
the unit. Consult local building codes and appropriate
national electrical codes (in USA, ANSI/NFPA70, National
Electrical Code (NEC); in Canada, CSA C22.1) for special
requirements.
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 cause personal injury
or death.
Before performing service or maintenance operations on
unit, always turn off main power switch to unit and install
lockout tag. Unit may have more than one power switch.
!WARNING
!

3
506 01 2302 02 Specifications are subject to change without notice.
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.
!WARNING
CUT HAZARD
Failure to follow this caution may result in damage
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
heat pump units.
CAUTION
!
INSTALLATION GUIDELINE
Replacement /Retrofit – R22 to R--410A
Split system heat pumps are intended to be installed with
matching indoor sections only. The CHS heat pump outdoor
units are matched only with same-size FHS indoor sections.
Existing R-22 indoor coils cannot be converted to R-410A
heat pump duty. Only the existing refrigerant piping is a
candidate for retrofit use.
Acid test – If the existing system is being replaced because
of a compressor electrical failure, assume acid is in system.
If system is being replaced for any other reason, use an
approved acid test kit to determine acid level. If even low
levels of acid are detected, install a 100 percent activated
alumina suction line filter drier in addition to the replacement
liquid-line filter drier. Operate this system in COOLING
ONLY. Remove the suction line filter drier as soon as
possible, with a maximum of 72 hr of operation.
Recommendation: Install a ball valve in the liquid line at the
filter drier location when installing a suction filter in the
suction line.
Installation –
1. Remove the existing evaporator coil or fan coil and in-
stall the replacement coil.
2. Drain oil from low points and traps in suction line tubing if
they were not replaced.
3. Remove the existing outdoor unit. Install the new outdoor
unit according to these installation instructions.
4. Install the factory-supplied liquid-line filter drier at the in-
door coil just upstream of the TXV.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Never install suction--line filter drier in the liquid--line of a
R--410A system.
CAUTION
!
5. If required, install a 100% activated alumina suction line
filter drier at the outdoor unit.
6. Evacuate and charge the system according to the in-
structions in this installation manual.
7. Operate the system for 10 hours. Monitor the pressure
drop across the suction line filter drier. If pressure drop
exceeds 3 psig (21kPa), replace suction-line and li-
quid-line filter driers. Be sure to purge system with dry
nitrogen and evacuate when replacing filter driers.
Continue to monitor the pressure drop across suc-
tion-line filter drier. Repeat filter changes is necessary.
Never leave suction-line filter drier in system longer than
72 hr (actual time).

FIGURE 1 -- CHS180 DIMENSIONS
13-1/4
[338]
3-3/4
[95]
16-3/8
[418]
4-5/8
[117]
13-1/2
LEFT SIDE VIEW
SEE DETAIL A
1-3/8 [34.5] POWER ENTRY
WITH 50.0/58.0/65.0 MM K.O.
7/8 [22.2] FIELD
ENTRY SERVICE PORT
ELECTRICAL
DISCONNECT
LOCATION
1-3/4 [44.5]
GUAGE ACCESS
[344]
Y
X
45-1/8
[1148]
CG
CORNER "B"
CORNER "A" CORNER "D"
CORNER "C"
TOP VIEW
SUCTION CONNECTIONS
(SEE CHART FOR SIZE)
6-1/8
[155]
11-1/8
[282]
5-7/8
[149]
DETAIL A
(NOTE POSITION OF CKT 1)
CKT 2 HP CKT 1 HP
LIQUID CONNECTIONS
(SEE CHART FOR SIZE)
OPTIONAL
FACTORY
INSTALLED
DISCONNECT
Z
85
[2158]
86-3/8
[2193]
CG
COMPRESSOR
ACCESS PANEL
H
SERVICE VALVE CONNECTIONS
UNIT SUCTION LIQUID
38AUQ16 1-3/8 [34.9] 1/2 [12.7]
QTY
2 EA
CENTER OF GRAVITY
DIRECTION OF AIR FLOW
DIMENSIONS IN [ ] ARE IN MM
CG
NOTES:
1. MINIMUM CLEARANCE (LOCAL CODES OR JURISDICTION MAY
PREVAIL):
A. BOTTOM TO COMBUSTIBLE SURFACES: 0 INCHES.
B. OUTDOOR COIL, FOR PROPER AIR FLOW: 36 INCHES
ONE SIDE, 12 INCHES THE OTHER. THE SIDE GETTING THE
GREATER CLEARANCE IS OPTIONAL.
C. OVERHEAD: 60 INCHES, TO ASSURE PROPER OUTDOOR FAN
OPERATION.
D. BETWEEN UNITS: CONTROL BOX SIDE, 42 INCHES PER NEC.
E. BETWEEN UNIT AND UNGROUNDED SURFACES: CONTROL BOX
SIDE, 36 INCHES PER NEC.
F. BETWEEN UNIT AND BLOCK OR CONCRETE WALLS AND OTHER
GROUNDED SURFACES: CONTROL BOX SIDE, 42 INCHES PER NEC.
2. WITH EXCEPTION OF THE CLEARANCE FOR THE OUTDOOR
COIL AS STATED IN NOTE 1B, A REMOVABLE FENCE
OR BARRICADE REQUIRES NO CLEARANCE.
3. UNITS MAY BE INSTALLED ON COMBUSTIBLE FLOORS MADE
FROM WOOD OR CLASS A, B OR C ROOF COVERING MATERIAL.
C101281
450601230202
Specifications are subject to change without notice.
Unit
Std. Unit Weight Corner A Corner B Corner C Corner D Center of Gravity Unit Height
lbs. kg lbs. kg lbs. kg lbs. kg lbs. kg X Y Z H
CHS180 768 348 236 107 183 83 153 69 196 89 39 (991) 20 (508) 23 (584) 50---38 (1279)
Unit
Service Valve Connections
Suction Liquid QTY
CHS180 1---3/8 (34.9) 1/2 (12.7) 2ea

FIGURE 2 -- CHS240 DIMENSIONS
C101282
5
506 01 2302 02 Specifications are subject to change without notice.
Unit
Std. Unit Weight Corner A Corner B Corner C Corner D Center of Gravity Unit Height
lbs. kg lbs. kg lbs. kg lbs. kg lbs. kg X Y Z H
CHS240 1015 460 354 161 224 102 170 77 268 122 37 (940) 26 (660) 23 (584) 50---3/8 (1279)
Unit
Service Valve Connections
Suction Liquid QTY
CHS240 1---3/8 (34.9) 1/2 (12.7) 2ea

650601230202
Specifications are subject to change without notice.
Table 1A — Physical Data — CHS180--240 Units — 60 Hz English
UNIT SIZE CHS 180 240
NOMINAL CAPACITY (tons) 15 20
REFRIGERANT SYSTEM‡
Refrigerant R--410A
# Circuits / # Compressor / Type 2/2/Scroll 2/2/Scroll
Shipping Charge A/B (lb) 9.0/9.0 9.0/9.0
Operating Charge w/Fan Coil†A/B (lbs) 21/21 27/27
Metering Device Fixed Orifice
High--Pressure Trip / Reset (psig) 630 / 505 630 / 505
Low--Pressure Trip / Reset (psig) 27 / 44 27 / 44
COMPRESSOR
Model ZP83 (2) ZP103 (2)
Oil Charge A/B (oz) 60 110
Speed (RPM) 3500 3500
OUTDOOR COIL
Material Al/Cu
Coil Type Round Tube/Plate Fin (RTPF)
Rows/Fins Per Inch (FPI) 2/17
Total Face Area (ft2)47.1 50.1
OUTDOOR FAN / MOTOR
Qty / Motor Drive Type 3/Direct 4/Direct
Motor HP / RPM 1/4 / 1100 1/4 / 1100
Diameter (in) 22 22
Nominal Airflow (Cfm) 10,000 14,000
Watts (Total) 970 1150
Cut-in 44 544 5
PIPING CONNECTIONS (in. ODS)
Qty...Vapor 2...13/82...13/8
Qty...Liquid 2...1/22...1/2
LEGEND
ODS — Outside Diameter Sweat (socket)
† Approximate system charge with 25 ft piping of sizes indicated with matched FHS

7
506 01 2302 02 Specifications are subject to change without notice.
Table 1B — Physical Data — CHS180--240 Units — 60 Hz SI
UNIT SIZE CHS 180 240
NOMINAL CAPACITY (kW) 15 20
REFRIGERANT SYSTEM‡
Refrigerant R--410A
# Circuits / # Compressor / Type 2/2/Scroll 2/2/Scroll
Shipping Charge A/B (kg) 4.1/4.1 4.1/4.1
Operating Charge w/Fan Coil†A/B (kg) 9.5/9.5 12.2/12.2
Metering Device Fixed Orifice
High--Pressure Trip / Reset (kPa) 4344 / 3482 4344 / 3482
Low--Pressure Trip / Reset (kPa) 372 / 807 372 / 807
COMPRESSOR
Model ZP83 (2) ZP103 (2)
Oil Charge A/B (L) 1.7 3.2
Speed (r/s) 58 58
OUTDOOR COIL
Material Al/Cu
Coil Type Round Tube/Plate Fin (RTPF)
Rows/Fins Per Meter (Fins/m) 2/17
Total Face Area (m2)4.4 4.6
OUTDOOR FAN / MOTOR
Qty / Motor Drive Type 3/Direct 4/Direct
Motor HP / r/s 1/4 / 18 1/4 / 18
Diameter (mm) 559 559
Nominal Airflow (L/s) 4719 6607
Watts (Total) 970 1150
Cut-in 44 544 5
PIPING CONNECTIONS (mm ODS)
Qty / Vapor 2 / 34.9 2 / 34.9
Qty / Liquid 2 / 12.7 2 / 12.7
LEGEND
NEMA — National Electrical Manufacturers Association
ODS — Outside Diameter Sweat (socket)
† Approximate system charge with 7.6 m piping of sizes indicated with matched FHS

850601230202
Specifications are subject to change without notice.
.INSTALLATION
Jobsite Survey
Complete the following checks before installation.
1. Consult local building codes and the NEC (National Elec-
trical Code) ANSI/NFPA 70 for special installation
requirements.
2. Determine unit location (from project plans) or select unit
location.
3. Check for possible overhead obstructions which may in-
terfere with unit lifting or rigging.
Step 1 — Plan for Unit Location
Select a location for the unit and its support system (pad,
rails or other) that provides for the minimum clearances
required for safety. This includes the clearance to
combustible surfaces, unit performance and service access
below, around and above unit as specified in unit drawings.
See Fig. 3.
Select a unit mounting system that provides adequate height
to allow for removal and disposal of frost and ice that will
form during the heating-defrost mode.
NOTE:Consider also the effect of adjacent units on airflow
performance and control box safety clearance.
Do not install the outdoor unit in an area where fresh air
supply to the outdoor coil may be restricted or when
recirculation from the condenser fan discharge is possible.
Do not locate the unit in a well or next to high walls.
Evaluate the path and required line length for interconnecting
refrigeration piping, including suction riser requirements
(outdoor unit above indoor unit), liquid line lift (outdoor unit
below indoor unit) and hot gas bypass line. Relocate
sections to minimize the length of interconnecting tubing.
DO NOT BURY REFRIGERATION LINES.
Although unit is weatherproof, avoid locations that permit
water from higher level runoff and overhangs to fall onto the
unit.
LEFT:
Min 18” (457 mm)
requried for service
RIGHT:
Min 18” (457 mm)
requried for service
REAR:
Min 18” (457 mm)
requried for service
Note: Observe requirements for 39” (914 mm) operating clearance
on either Left or Rear coil opening.
FRONT:
42” (1067 mm)
FIGURE 3 -- Service Clearance Dimensional Drawing
Step 2 — Complete Pre-Installation Checks
Check Unit Electric Characteristic —
Confirm before installation of unit that voltage, amperage and
circuit protection requirements listed on unit data plate agree
with power supply provided.
Un--crate Unit —
Remove unit packaging except for the top skid assembly,
which should be left in place until after the unit is rigged into
its final location.
Inspect Shipment —
File a claim with shipping company if the shipment is
damaged or incomplete.
Consider System Requirements —
SConsult local building codes and National Electrical Code
(NEC, U.S.A.) for special installation requirements.
SAllow sufficient space for airflow clearance, wiring,
refrigerant piping, and servicing unit. See Figs. 1 and 2 for
unit dimensions and weight distribution data.
SLocate the unit so that the outdoor coil (condenser) airflow
is unrestricted on all sides and above.

9
506 01 2302 02 Specifications are subject to change without notice.
SThe unit may be mounted on a level pad directly on the
base channels or mounted on raised pads at support
points. See Tables 1A and 1B for unit operating weights.
SeeFigs.1and2forweightdistributionbasedon
recommended support points.
NOTE:If vibration isolators are required for a particular
installation,usethedatainFigs.1and2tomaketheproper
selection.
Step 3 — Prepare Unit Mounting Support
Slab Mount —
Provide a level concrete slab that extends a minimum of 6 in.
(150 mm) beyond unit cabinet. Install a gravel apron in front
of condenser coil air inlet to prevent grass and foliage from
obstructing airflow.
Step 4 — Rig and Mount the Unit
Rigging —
These units are designed for overhead rigging. Refer to the
rigging label for preferred rigging method. Spreader bars are
not required if top crating is left on the unit. All panels must
be in place when rigging. As further protection for coil faces,
plywood sheets may be placed against the sides of the unit,
behind cables. Run cables to a central suspension point so
that the angle from the horizontal is not less than 45
degrees. Raise and set the unit down carefully.
If it is necessary to roll the unit into position, mount the unit
on longitudinal rails, using a minimum of 3 rollers. Apply
force to the rails, not the unit. If the unit is to be skidded into
position, place it on a large pad and drag it by the pad. Do
not apply any force to the unit.
Raise from above to lift the unit from the rails or pad when
unit is in its final position.
After the unit is in position, remove all shipping materials and
top crating.
Step 5 — Complete Refrigerant Piping
Connections
Refrigerant lines must be carefully designed and
constructed to ensure equipment reliability and efficiency.
Line length, pressure drop, compressor oil return, and
vertical separation are several of the design criteria that
must be evaluated. See Table 1.
IMPORTANT:Do not bury refrigerant piping
underground.
IMPORTANT:A refrigerant receiver is not
provided with the unit. Do not install a receiver.

10 50601230202
Specifications are subject to change without notice.
Table 1—CHS180--240 Piping Recommendations (Two-Circuit Unit)
R-410A Equivalent Length
Model
Nominal Capacity
Length Equiv 0-38 38-75 75-113 113-150 150-188
Length Lin 0-25 25-50 50-75 75-100 100-125
CHS180 Liquid Line 1/21/21/21/21/2
Max Lift
Cool 25 50 75 100 125
Heat 25 50 60 60 60
Vapor Line 11/811/811/811/811/8
Charge ea. (lbs) 20.9 22.8 24.8 26.6 28.6
CHS240 Liquid Line 1/21/25/81/25/85/85/8
Max Lift
Cool 25 37 50 24 51 48 63
Heat 25 50 50 60 60 60 60
Vapor Line 11/811/811/811/813/813/8
Charge ea. (lbs) 26.9 28.8 30.7 30.7 33.6 37.1 40.2
Legend:
Length Equiv Equivalent tubing length, including effects of refrigeration specialties devices
Linear Lin Typical linear tubing length, Feet (50% added to linear to define Equivalent Length for this table)
Liquid Line Tubing size, inches OD.
Max Lift Maximum liquid lift (indoor unit ABOVE outdoor unit only), at maximum permitted liquid line pressure drop —
SLinear Length Less than 100 ft: Minimum 2.0F subcooling entering TXV
SLinear Length Greater than 100 ft: Minimum 0.5F subcooling entering TXV
Vapor Line Tube size, inches OD
Charge Charge Quantity, lbs. Calculated for both liquid line sizes (where applicable), but only with larger suction line
size (where applicable)
NOTE: For applications with equivalent length greater than 188 ft (57 m) and/0r linear length greater than 125 ft (38
m), contact your local Carrier representative.
Check Vertical Separation —
If there is any vertical separation between the indoor and
outdoor units, check to ensure that the separation is within
allowable limits. Relocate equipment if necessary.
Provide Safety Relief —
If local codes dictate an additional safety relief device,
purchase locally and install locally. Installation will require the
recovery of the factory shipping charge before the factory
tubing can be cut and the supplemental relief device is
installed.
Refrigerant Line Sizing —
Consider the length of the piping required between the
outdoor and indoor units. The maximum allowable line length
is 100 ft (30.5 m). See Table 1. Refrigerant vapor piping
should be insulated.
Install Filter Driers and Moisture Indicators —
Every unit MUST have bi-directional filter driers in the liquid
lines. Locate the filter driers at the indoor unit, close to the
evaporator coil’s thermal expansion valve (TXV) inlets.
CHS units include two R--410A-duty filter driers, shipped in
cartons attached to the unit basepan. Remove the filter
driers and prepare to install in the liquid lines at the
evaporator coil. Do not remove connection fitting plugs until
ready to connect and braze the filter driers into the liquid line
positions See Table 2.
IMPORTANT:A refrigerant receiver is not
provided with the unit. Do not install a receiver.
Installation of liquid line moisture indicating sightglass in
each circuit is recommended. Locate the sightglass(es)
between the outlet of the filter drier and the TXV inlet.
Refer to Table 3 for recommendations on refrigeration
specialties.
Select the filter drier for maximum unit capacity and
minimum pressure drop. Complete the refrigerant piping
from the indoor unit to the outdoor unit before opening the
liquid and suction lines at the outdoor unit.