brant Legacy Line 135SAN Air Conditioner with Puron Advance Refrigerant Installation Guide
- June 28, 2024
- brant
Table of Contents
Legacy Line 135SAN Air Conditioner with Puron Advance Refrigerant
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Specifications:
- Product Name: 135SAN LegacyTM Line Air Conditioner
- Refrigerant: Puron AdvanceTM (R-454B)
- Nominal Tonnage: 1-1/2 to 5 Tons
Product Usage Instructions:
Safety Considerations:
It is crucial that this air conditioner is installed by EPA
qualified personnel with the appropriate certification. Ensure that
individuals with reduced capabilities are supervised when using the
appliance. Follow all safety codes, wear safety gear, and have
necessary fire extinguishing equipment available.
General Guidelines:
Read the entire instruction manual before starting the
installation process. Adhere to all safety precautions and consult
local building codes as well as electrical codes.
Installation Process:
Use proper tools designed for the refrigerant being used. For
A2L refrigerants, utilize non-sparking tools. Conduct leak checks
using a refrigerant detector before and during installation. Avoid
open flames except during brazing on properly evacuated tubes.
Safety Alerts:
Recognize safety symbols and signal words such as DANGER,
WARNING, CAUTION, and NOTE. Take necessary precautions based on
these alerts to prevent personal injury or damage.
FAQ:
Q: Can anyone install this air conditioner?
A: No, only EPA qualified personnel with appropriate
certification should install this unit. Safety precautions must be
strictly followed.
Q: What refrigerant does this air conditioner use?
A: This air conditioner uses Puron AdvanceTM refrigerant with
R-454B.
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135SAN LegacyTM Line Air Conditioner with Puron AdvanceTM Refrigerant 1-1/2 to 5 Nominal Tons
Installation Instructions
NOTE: For use with R-454B indoor units only. Read the entire instruction
manual before starting installation.
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. 1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . 1 INSTALLATION . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . 2
Check Equipment and Job Site . . . . . . . . . . . . . . . . . . . . . . . . .
. . 2 Install on a Solid, Level Mounting Pad . . . . . . . . . . . . . . . . .
. . . . 2 Clearance Requirements . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . 2 Operating Ambient. . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . 2 Make Piping Connections . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . 3 Mandatory Requirements . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . 4 Make Electrical
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Compressor Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 6 Install Electrical Accessories . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . 6 Start-Up . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . 6 Check Charge . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Final Checks. . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 Repairing Refrigerant Circuit. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . 8 CARE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . 8
SAFETY CONSIDERATIONS
IMPORTANT: This appliance shall only be installed by EPA qualified personnel
having appropriate certification. This appliance is not intended for use by
persons (including children) with reduced physical, sensory or mental
capabilities or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the appliance by a person
responsible for their safety.
Improper installation, adjustment, alteration, service, maintenance, or use
can cause explosion, fire, electrical shock, or other conditions which may
cause death, 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, protective clothing, and work
gloves. Use quenching cloth for brazing operations. Have a dry powder or CO2
fire extinguisher available. Read these instructions thoroughly and follow all
warnings or cautions included in literature and attached to the unit. Consult
local building codes and current editions of the National Electrical Code
(NEC) NFPA 70. In Canada, refer to current editions of the Canadian electrical
code CSA 22.1.
Proper tools should be used that are designed for the refrigerant of the unit
being installed. For A2L refrigerants, non-sparking tools are required. A
refrigerant detector should be used prior to and during the installation
process to check for leaks. Open flames or other ignition sources should not
be present except during brazing. Brazing should only take place on
refrigerant tubes that are open to the atmosphere or have been properly
evacuated.
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 these signal words; DANGER, WARNING, and CAUTION. 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 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.
! WARNING
ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in
personal injury or death. Before installing, modifying, or servicing system,
main electrical disconnect switch must be in the OFF position. There may be
more than 1 disconnect switch. Lock out and tag switch with a suitable warning
label.
! WARNING
EXPLOSION HAZARD Failure to follow this warning could result in death, serious
personal injury, and/or property damage. Never use air or any gas containing
oxygen for leak testing or operating refrigerant compressors. Never allow
compressor suction pressure to operate in a vacuum with service valves closed.
See service manual for pump-down instructions.
GENERAL
NOTE: In some cases noise in the living area has been traced to gas pulsations
from improper installation of equipment. 1. Roof mounted units exposed to
winds may require wind baffles. 2. Locate unit away from windows, patios,
decks, etc. where unit
operation sound may disturb customer. 3. Ensure that vapor and liquid tube
diameters are appropriate for unit
capacity. 4. Run refrigerant tubes with no bends with centerline bend radius
less
than 2.5 times the external pipe diameter. 5. Leave some slack between
structure and unit to absorb vibration. 6. When passing refrigerant tubes
through the wall, seal opening with
RTV or other pliable silicon-based caulk. (See Fig. 1.) 7. Avoid direct tubing
contact with water pipes, duct work, floor
joists, wall studs, floors, and walls. 8. Do not suspend refrigerant tubing
from joists and studs with a rigid
wire or strap which comes in direct contact with tubing (see Fig. 1). 9.
Ensure that tubing insulation is pliable and completely surrounds
vapor tube. 10. When necessary, use hanger straps which are 1 in. (25 mm) wide
and conform to shape of tubing insulation. (See Fig. 1.) 11. Isolate hanger
straps from insulation by using metal sleeves bent to
conform to shape of insulation. 12. Provision shall be made for expansion and
contraction of long runs
of piping.
135SAN: Installation Instructions
13. Piping and fittings shall be protected as far as possible against adverse environmental effects. For example, the accumulation of dirt and debris.
14. Piping should be installed to reduce the likelihood of hydraulic shock damaging the system.
15. Certified piping and components must be used in order to protect against corrosion.
16. Flexible pipe elements shall be protected against mechanical damage, excessive stress by torsion, or other forces. They should be checked for mechanical damage annually.
17. Piping material, routing, and installation shall include protection from physical damage in operation and service, and be in compliance with the national and local codes and standards of the installation site.
18. When setting up refrigerant piping, precautions shall be taken to avoid excessive vibration or pulsation
OUTDOOR WALL
INDOOR WALL
CAULK
LIQUID TUBE
Install on a Solid, Level Mounting Pad
If conditions or local codes require the unit be attached to pad, tie down
bolts should be used and fastened through knockouts provided in unit base pan.
Refer to unit mounting pattern in Fig. 2 to determine base pan size and
knockout hole location.
For hurricane tie downs, contact local distributor for details and PE
(Professional Engineer) certification, if required.
INSULATION
SUCTION TUBE
THROUGH THE WALL
HANGER STRAP (AROUND SUCTION
TUBE ONLY)
JOIST
INSULATION SUCTION TUBE
1″ (25.4 mm) MIN
SUSPENSION
LIQUID TUBE
Fig. 1 Connecting Tubing Installation
A07588
INSTALLATION
IMPORTANT: Effective January 1, 2023, all split system and packaged air
conditioners must be installed pursuant to applicable regional efficiency
standards issued by the Department of Energy.
! 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 and gloves when handling parts.
Check Equipment and Job Site Unpack Unit
Move to final location. Remove carton taking care not to damage unit.
Inspect Equipment File claim with shipping company prior to installation if
shipment is damaged or incomplete. Locate unit rating plate on unit corner
panel. It contains information needed to properly install unit. Check rating
plate to be sure unit matches job specifications.
UNIT BASE PAN Dimension in. (mm)
23-1/2 X 23-1/2 (596.9 X 596.9)
TIEDOWN KNOCKOUT LOCATIONS in. (mm)
A
B
C
7-13/16 (198.4) 47/16 (112.7) 181/16 (458.8)
26 X 26 (660.4 X 660.4)
91/8 (231.8)
47/16 (112.7) 211/4 (539.8)
311/2 X 311/2 (800.1 X 800.1)
91/8 (231.8)
69/16 (166.7) 2411/16 (627.1)
35 X 35 (889 X 889)
91/8 (231.8)
69/16 (166.7) 287/16 (722.3)
Fig. 2 Tiedown Knockout Locations
A05177
On rooftop applications, mount on level platform or frame. Place unit above a load-bearing wall and isolate unit and tubing set from structure. Arrange supporting members to adequately support unit and minimize transmission of vibration to building. Consult local codes governing rooftop applications.
Maximum allowed elevation is 10,000 feet (3000 meters) above sea
level. Consult the Application Guideline and Service Manual Residential Split System Air Conditioners and Heat Pumps for wind baffle construction.
NOTE: Unit must be level to within ±2° (±3/8 in./ft.±9.5 mm/m) per compressor manufacturer specifications.
Clearance Requirements
When installing, allow sufficient space for airflow clearance, wiring, refrigerant piping, and service. Allow 24 in. (610 mm) clearance to service end of unit and 48 in. (1219 mm) (above unit. For proper airflow, a 6-in. (152 mm) clearance on 1 side of unit and 12-in. (305 mm) on all remaining sides must be maintained. Maintain a distance of 24 in. (610 mm) between units or 18 in. (457 mm) if no overhang within 12 ft. (3.67 m) Position so water, snow, or ice from roof or eaves cannot fall directly on unit.
NOTE: 18″ (457 mm) clearance option described above is approved for outdoor units with wire grille coil guard only. Units with louver panels require 24″ (610 mm) between units.
On rooftop applications, locate unit at least 6 in. (152 mm) above roof surface.
Operating Ambient
The minimum outdoor operating ambient in cooling mode without accessory is 55°F (13°C).
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 2
135SAN: Installation Instructions
Make Piping Connections
! WARNING
PERSONAL INJURY AND ENVIRONMENTAL HAZARD Failure to follow this warning could
result in personal injury or death. Relieve pressure and recover all
refrigerant before system repair or final unit disposal. Use all service ports
and open all flow-control devices, including solenoid valves. Federal
regulations require that refrigerant is not vented into the atmosphere.
Recover during system repair or final unit disposal.
! CAUTION
UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment
damage or improper operation. If ANY refrigerant tubing is buried, provide a
6-in (152 mm) vertical rise at service valve. Refrigerant tubing lengths up to
36-in (914 mm) may be buried without further special consideration. Do not
bury lines more than 36-in. (914 mm).
Outdoor units may be connected to indoor section using accessory tubing
package or field-supplied refrigerant grade tubing of correct size and
condition. Rated tubing diameters shown in Table 1 are recommended up to 80
ft. (24 m). See Product Data for acceptable alternate vapor diameters and
associated capacity losses. For tubing requirements beyond 80 ft. (24 m),
substantial capacity and performance losses can occur. Following the
recommendations in the Residential Piping and Long Line Guideline will reduce
these losses. Refer to Table 1 for field tubing diameters. Refer to the
Product Data for accessory requirements. There are no buried-line applications
greater than 36-in. (914 mm) allowed. If refrigerant tubes or indoor coil are
exposed to atmosphere, they must be evacuated to 500 microns to eliminate
contamination and moisture in the system. Refrigerant pipe should be installed
with the minimum length possible and practical for the application. Piping
should be protected from physical damage in operation and in service and be in
compliance with national and local codes such as ASRHAE 15, ASHRAE 15.2,
IAPMO. Uniform Mechanical Code, ICC International Mechanical Code, or CSA B52.
When piping is installed through studs in a wall, steel plates should be used
for protection with a minimum thickness of 16 gauge. All field joints shall be
accessible for inspection prior to being covered or enclosed. Outdoor Unit
Connected to Factory Approved R-454B Indoor Unit When outdoor unit is
connected to factoryapproved R-454B indoor unit, outdoor unit contains
approximate system refrigerant charge for operation with AHRI rated indoor
unit when connected by 15 ft. (5 m) of fieldsupplied or factory accessory
tubing and factory supplied filter drier. For all sizes, adjust charge by
adding or removing 0.6 oz/ft of 3/8 liquid line above or below 15 ft. (5 m)
respectively. Connect vapor and liquid tubes to fittings on vapor and liquid
service valves (see Table 1). Use refrigerant grade tubing.
Service Valves Service valves are closed and plugged from the factory. Outdoor
units are shipped with a refrigerant charge sealed in the unit. Leave the
service valves closed until all other refrigerant system work is complete or
the charge will be lost. Leave the plugs in place until line set tubing is
ready to be inserted. Refrigerant Tubing Connection Outdoor IMPORTANT: Maximum
liquid-line size is 3/8-in. OD for all residential applications including long
line. Refer to Residential Piping and Long Line Guideline for further
information. IMPORTANT: Always install the factory-supplied liquid-line filter
drier. If replacing the filter drier, refer to Product Replacement Parts List
for appropriate part number. Obtain replacement filter driers from your
distributor or branch. Brazing Connection
! WARNING
FIRE HAZARD Failure to following this warning could result in personal injury,
death and/or property damage. Refrigerant and oil mixture could ignite and
burn as it escapes and contacts brazing torch. Make sure the refrigerant
charge is properly removed from both the high and low sides of the system
before brazing any component or lines.
! CAUTION
UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment
damage or improper operation. Service valves must be wrapped in a heat-sinking
material such as a wet cloth while brazing.
! CAUTION
BURN HAZARD Failure to follow this caution may result in personal injury
Components will be HOT after brazing. Wear appropriate personal protective
equipment and allow to cool before handling parts and equipment.
If using brazing connections, use a properly sized swedge tool to create a
swedge (bell) on one of the two copper tubes being connected. Alternatively, a
copper coupling can be used which will require two braze joints instead of
one. Clean line set tube ends with emery cloth or steel brush. Remove any grit
or debris. Connect vapor tube to fitting on outdoor unit vapor service valves
(see Table 1). Connect liquid tubing to adapter tube on liquid service valve.
Use refrigerant grade tubing. Apply heat absorbing paste or heat sink product
between service valve and joint. Wrap service valves with a heat sinking
material such as a wet cloth. After wrapping service valve with a wet cloth,
tubing set can be brazed to service valve using either silver bearing or
nonsilver bearing brazing material. Do not use soft solder (materials which
melt below 800°F/427°C). Braze joints using a Sil-Fos or Phos-copper alloy.
Consult local code requirements.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 3
135SAN: Installation Instructions
Some outdoor units contain a mechanical fitting at the liquid distributor.
This connection is not field serviceable and should not be disturbed. For
Vapor Service Valve, remove valve core from schrader port on Service Valve
BEFORE brazing. This helps prevent overheating and damage to valve seals
(refer to Fig. 3). Replace valve core when brazing is completed.
Fig. 3 Vapor Service Valve
A14236
Table 1 Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters (In.)
UNIT SIZE
18 24, 30 36, 42, 48
60
LIQUID*
Tube Diameter
3/8 3/8 3/8 3/8
RATED VAPOR*
Connection Diameter
Tube Diameter
3/4
5/8
3/4
3/4
7/8
7/8
7/8
1-1/8
*.Units are rated with 25 ft. (7.6 m) of lineset. See Product Data sheet for performance data when using different size and length linesets.
Notes: 1.Do not apply capillary tube indoor coils to these units. 2.For Tubing
Set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 35 ft.(11
m) vertical differential 250 ft. (76.2 m) Total Equivalent Length, refer to
the Residential Piping and Long Line Guideline Air Conditioners and Heat
Pumps using Puron AdvanceTM refrigerant.
3.For alternate liquid line options, see Product Data or Residential Piping
and Long Line Application Guideline
Mechanical Line Set Connections
If using mechanical or crimp-type line set connections, follow crimp tool
manufacturer’s instructions. Mechanical fittings are only permitted if
approved for field installation by the supplier.
NOTE: Failure of the fittings or failure of the equipment due to use of
mechanical fittings would not be covered under the equipment limited warranty
Install Liquid-Line Filter Drier Indoor
! CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or improper
operation. 1. Installation of filter drier in liquid line is required. 2.
Filter drier must be wrapped in a heat-sinking material such as a wet
cloth while brazing.
Refer to Fig. 4 and install filter drier as follows:
3. Braze filter drier to above 5-in. (127 mm) liquid tube. Flow arrow must
point towards indoor coil.
4. Connect and braze liquid refrigerant tube to the filter drier. Evacuate
Refrigerant Tubing and Indoor Coil
! CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or improper
operation.
Never use the system compressor as a vacuum pump.
Refrigerant tubes and indoor coil should be evacuated using the recommended
deep vacuum method of 500 microns. The alternate triple evacuation method may
be used (see triple evacuation procedure in service manual). Always break a
vacuum with dry nitrogen. Leak Check The deep vacuum method requires a vacuum
pump capable of pulling a vacuum of 500 microns and a vacuum gauge capable of
accurately measuring this vacuum depth. The deep vacuum method is the most
positive way of assuring a system is free of air and liquid water. A tight dry
system will hold a vacuum of 1000 microns after approximately 7 minutes. See
Fig. 5
Fig. 5 Deep Vacuum Graph
A95424
Mandatory Requirements
Pressure Proof Check
Refrigerant tubes and indoor coil should be pressure tested with an inert gas such as nitrogen. Pressurize the system with the inert gas to the Low Side Test Pressure listed on the outdoor unit rating plate
1. Perform a pressure check of the unit with a nitrogen charge of about 200psi.
2. The Nitrogen holding charge must NOT decrease in pressure for 1 hour, as indicated by the test gauge. The measuring test gauge resolution not exceeding 5% of the holding charge.
! WARNING
EXPLOSION HAZARD
Failure to follow this warning could result in death, serious personal injury
and/or property damage. Never exceed the test pressures listed on the rating
plate when pressure testing an outdoor unit.
Fig. 4 Liquid Line Filter Drier 1. Braze 5-in. liquid tube to the indoor coil. 2. Wrap filter drier with damp cloth.
A05178
! WARNING
FIRE HAZARD Failure to following this warning could result in personal injury,
death and/or property damage. DO NOT USE FLAMES OR IGNITION SOURCES TO LEAK
CHECK.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 4
135SAN: Installation Instructions
Final Tubing Check IMPORTANT: Check to be certain factory tubing on both
indoor and outdoor unit has not shifted during shipment. Ensure tubes are not
rubbing against each other or any sheet metal or wires. Pay close attention to
feeder tubes, making sure wire ties on feeder tubes are secure and tight.
! WARNING
ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in
personal injury or death. Do not supply power to unit with compressor terminal
box cover removed.
Make Electrical Connections
Be sure field wiring complies with local and national fire, safety, and
electrical codes, and voltage to system is within limits shown on unit rating
plate. Contact local power company for correction of improper voltage. See
unit rating plate for recommended circuit protection device. NOTE: Operation
of unit on improper line voltage constitutes abuse and could affect unit
reliability. See unit rating plate. Do not install unit in system where
voltage may fluctuate above or below permissible limits. NOTE: Use copper wire
only between disconnect switch and unit. NOTE: Install branch circuit
disconnect of adequate size per NEC to handle unit starting current. Locate
disconnect within sight and readily accessible from unit, per Section 440-14
of NEC. Refer to Product Data for breaker sizing. Route Ground and Power Wires
Remove access panel to gain access to unit wiring. Extend wires from
disconnect through power wiring hole provided and into unit control box.
! WARNING
ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in
personal injury or death. The unit cabinet must have an uninterrupted or
unbroken ground to minimize personal injury if an electrical fault should
occur. The ground may consist of electrical wire or metal conduit when
installed in accordance with existing electrical codes.
Connect Ground and Power Wires This appliance incorporates an earth connection
for safety purposes only. Connect ground wire to ground connection in control
box for safety. Connect power wiring to contactor as shown in Fig. 6.
Connect Control Wiring
Route 24-v control wires through control wiring grommet and connect leads to
control wiring. Refer to thermostat Installation Instructions for wiring
specific unit combinations (see Fig. 7).
Use No. 18 AWG color-coded, insulated (35°C minimum) wire. If thermostat is
located more than 100 ft. (30 m) from unit, as measured along the control
voltage wires, use No. 16 AWG color-coded wire to avoid excessive voltage
drop.
All wiring must be NEC Class 2 and must be separated from incoming power
leads.
Use furnace transformer, fan coil transformer, or accessory transformer for
control power, 24v/40va minimum.
NOTE: Use of available 24v accessories may exceed the minimum 40va power
requirement. Determine total transformer loading and increase the transformer
capacity or split the load with an accessory transformer as required.
NOTE: Factory Authorized Dissipation System must be installed with the indoor
unit.
Fig. 6 Line Connections
A94025
Fig. 7 Generic Wiring Diagrams (See Thermostat InsAt2a4l0l2a8t3i/oA9n7368 Instruction for specific unit combinations)
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 5
135SAN: Installation Instructions
Final Wiring Check IMPORTANT: Check factory wiring and field wire connections
to ensure terminations are secured properly. Check wire routing to ensure
wires are not in contact with tubing, sheet metal, etc. Compressor Crankcase
Heater When equipped with a crankcase heater, furnish power to heater a
minimum of 24 hr before starting unit. To furnish power to heater only, set
thermostat to OFF and close electrical disconnect to outdoor unit. A crankcase
heater is required if refrigerant tubing is longer than 80 ft. (24 m) or when
outdoor unit is 35 ft. (11 m) below indoor unit. Refer to the Residential
Piping and Long Line Guideline and Service Manual. Install Electrical
Accessories Refer to the individual instructions packaged with kits or
accessories when installing.
! WARNING
PERSONAL INJURY AND/OR PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in personal injury and/or property
damage. For continued performance, reliability, and safety, the only approved
accessories and replacement parts are those specified by the equipment
manufacturer. The use of non-manufacturer approved parts and accessories could
invalidate the equipment limited warranty and result in fire risk, equipment
malfunction, and failure. Please review manufacturer’s instructions and
replacement part catalogs available from your equipment supplier.
Start-Up
! CAUTION
ENVIRONMENTAL HAZARD Failure to follow this caution may result in
environmental damage. Federal regulations require that you do not vent
refrigerant to the atmosphere. Recover during system repair or final unit
disposal.
Follow these steps to properly start up system:
! WARNING
PERSONAL INJURY HAZARD Failure to follow this warning could result in personal
injury or death. Do not use power tools to open and close service valves.
Power tools can cause valve stem to suddenly be ejected from the valve body
followed by a high pressure refrigerant leak.
1. After system is evacuated, fully open liquid and vapor service valves.
2. Unit is shipped with valve stem(s) front seated (closed) and caps
installed. Replace stem caps after system is opened to refrigerant flow.
Replace caps finger-tight and tighten with wrench an additional 1/12 turn.
3. Close electrical disconnects to energize system. 4. Set room thermostat at
desired temperature. Be sure set point is
below indoor ambient temperature. 5. Set room thermostat to COOL and fan
control to ON or AUTO
mode, as desired. Operate unit for 15 minutes. Check system refrigerant
charge. 3-Phase Monitor In 3-phase units, a small circuit board is factory
installed to monitor line voltage (see Fig. 8). A small LED will flash if a
phase problem exists. See code descriptions on monitor. If LED is flashing,
disconnect power to unit and interchange 2 field-wiring leads on unit
contactor.
! CAUTION
UNIT OPERATION AND SAFETY HAZARD Failure to follow this caution may result in
personal injury, equipment damage or improper operation. · Do not overcharge
system with refrigerant. · Do not operate unit in a vacuum or at negative
pressure. · Compressor dome temperatures may be hot.
! CAUTION
PERSONAL INJURY HAZARD Failure to follow this caution may result in personal
injury. Wear safety glasses, protective clothing, and gloves when handling
refrigerant and observe the following: · Front seating service valves are
equipped with Schrader valves.
Fig. 8 3Phase Monitor Control (Applies to 3Phase Units Only)
A00010
Table 2 3-Phase Monitor LED Indicators
LED OFF FLASHING ON
STATUS No call for compressor operation
Reversed phase Normal
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 6
135SAN: Installation Instructions
! CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or improper
operation.
Ensure compressor rotation is correct.
· 3-phase scroll compressors are rotation sensitive. · A flash LED on phase
monitor indicates reverse rotation. (See
Table 2). This will not allow contractor to be energized. · Disconnect power
to unit and interchange 2 field-wiring leads on unit
contactor
Sequence of Operation
Turn on power to indoor and outdoor units. Transformer is energized.
On a call for cooling, thermostat makes circuits R-Y and R-G. Circuit R-Y
energizes contactor, starting outdoor fan motor and compressor circuit. R-G
energizes indoor unit blower relay, starting indoor blower motor on high
speed.
When thermostat is satisfied, its contacts open, de-energizing contactor and
blower relay. Compressor and motors should stop.
If indoor unit is equipped with a time-delay relay circuit, the indoor blower
will run up to 30 or 90 seconds to increase system efficiency.
Check Charge
Factory charge amount and desired subcooling are shown on unit rating plate.
Charging method is shown on information plate inside unit. Care should be
taken to ensure proper refrigerant is used for charging. Refer to outdoor unit
rating plate to determine proper refrigerant. Refrigerant cylinders used for
charging should be kept in an appropriate position and grounded to earth
before charging. Hose length should be kept to a minimum. Care should be taken
to not overcharge the system. For TXV, use subcooling method. To properly
check or adjust charge, conditions must be favorable for subcooling charging.
Favorable conditions exist when the outdoor temperature is between 70°F and
100°F (21°C and 38°C), and the indoor temperature is between 70°F and 80°F
(21°C and 27°C). Follow the procedure below: Unit is factory charged for 15ft
(4.6 m) of lineset. Adjust charge by adding or removing 0.6 oz/ft of 3/8
liquid line above or below 15 ft. (4.6 m) respectively. Allow system to
operate at least 15 minutes. If conditions are favorable, check system charge
by subcooling method for TXV. If any adjustment is necessary, adjust charge
slowly and allow system to operate for 15 minutes to stabilize before
declaring a properly charged system. If the indoor temperature is above 80°F
(27°C), and the outdoor temperature is in the favorable range, adjust system
charge by weight based on line length and allow the indoor temperature to drop
to 80°F (27°C) before attempting to check system charge by subcooling method
as described above. If the indoor temperature is below 70°F (21°C), or the
outdoor temperature is not in the favorable range, adjust charge for line set
length above or below 15 ft. (4.6 m) only. Charge level should then be
appropriate for the system to achieve rated capacity. The charge level could
then be checked at another time when the both indoor and outdoor temperatures
are in a more favorable range.
Units with TXV
Units installed with TXV require charging by the subcooling method. 1. Operate
unit a minimum of 15 minutes before checking charge.
2. Measure liquid service valve pressure by attaching an accurate gauge to
service port.
3. Measure liquid line temperature by attaching an accurate thermistor type
or electronic thermometer to liquid line near outdoor coil.
4. Refer to unit rating plate for required subcooling temperature.
5. Refer to Table 4. Find the point where required subcooling temperature
intersects measured liquid service valve pressure.
6. To obtain required subcooling temperature at a specific liquid line
pressure, add refrigerant if liquid line temperature is higher than indicated
or reclaim refrigerant if temperature is lower. Allow a tolerance of ±3°F
(±1.7°C).
NOTE: If line length is beyond 80 ft (24 m) or greater than 35 ft (11 m)
vertical separation, See Residential Piping and Long Line Guideline for
special charging requirements. Final charge should be recorded on the outdoor
unit charging label with permanent and legible writing. Total refrigerant
charge is factory charge plus any added charge. Verify that the indoor space
served by the indoor unit, including spaces connected by ductwork, exceed the
minimum room size as listed on the outdoor unit charging label. Refer to Table
3.
Table 3 Minimum Room Area Charging Table
Total System Charge (lbs.) 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
Minimum Floor Area (sq. ft.) 61 76 91 106 122 137 152 167 182 196 213 226 243 256 274 289 304 319 335 350 365 380
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 7
135SAN: Installation Instructions
Table 4 Required Liquid Line Temperature
Liquid (PSIG)
Pressure at Service Valve
6
R-454B Required Subcooling Temperature (°F)
8
10
12
14
16
238
78
76
74
72
70
68
245
80
78
76
74
72
70
252
82
80
78
76
74
72
260
84
82
80
78
76
74
268
86
84
82
80
78
76
276
88
86
84
82
80
78
284
90
88
86
84
82
80
292
92
90
88
86
84
82
301
94
92
90
88
86
84
309
96
94
92
90
88
86
318
98
96
94
92
90
88
327
100
98
96
94
92
90
336
102
100
98
96
94
92
346
104
102
100
98
96
94
355
106
104
102
100
98
96
365
108
106
104
102
100
98
375
110
108
106
104
102
100
385
112
110
108
106
104
102
396
114
112
110
108
106
104
406
116
114
112
110
108
106
417
118
116
114
112
110
108
428
120
118
116
114
112
110
439
122
120
118
116
114
112
450
124
122
120
118
116
114
Final Checks
IMPORTANT: Before leaving job, be sure to do the following:
1. Ensure that all wiring is routed away from tubing and sheet metal edges to
prevent rub-through or wire pinching.
2. Ensure that all wiring and tubing is secure in unit before adding panels
and covers. Securely fasten all panels and covers.
3. Tighten service valve stem caps to 1/12-turn past finger tight.
4. Leave Owner’s Manual with owner. Explain system operation and periodic
maintenance requirements outlined in manual.
5. Fill out Dealer Installation Checklist and place in customer file.
Repairing Refrigerant Circuit
When breaking into the refrigerant circuit to make repairs, or for any other
purpose, the following procedures shall be used.
1. Safely remove the refrigerant using a recovery pump certified for
flammable refrigerants.
2. Purge the refrigerant circuit with nitrogen gas.
3. Evacuate the refrigerant circuit to 1500 microns.
4. Break vacuum with a nitrogen purge of the refrigerant circuit ensuring
that the outlet of the vacuum pump is not near a potential ignition source.
5. Open the circuit by cutting or brazing.
CARE AND MAINTENANCE
For continuing high performance and to minimize possible equipment failure,
periodic maintenance must be performed on this equipment.
Frequency of maintenance may vary depending upon geographic areas, such as
coastal applications. See Owner’s Manual for information.
Training My Learning Center is your central location for professional residential HVAC training resources that help strengthen careers and businesses. We believe in providing high quality learning experiences both online and in the classroom. Access My Learning Center with your HVACpartners credentials at www.mlctraining.com. Please contact us a mylearning@carrier.com with questions.
© 2024 Carrier. All rights reserved. A Proud Member of the Carrier Family
Edition Date: 06/24
Catalog No: II135SAN-01 Replaces:New
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
8
References
Read User Manual Online (PDF format)
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