Johnson Controls ZL Series User manual

6150258-UIM-A-1021
A-1021
York International Corporation, 5005
York Drive, Norman, OK 73069
www.johnsoncontrols.com
2021-05-26
Johnson Controls Ducted Systems
Installation Manual ZL Series 3 ton to 5
ton 60 Hz R-410A

2 Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A
Johnson Controls Ducted Systems

Contents
ContentsGeneral.............................................................................5
Nomenclature............................................................8
Installation....................................................................... 9
Preceding installation...............................................9
Limitations......................................................... 11
Location....................................................................13
Rigging and handling............................................. 13
ZL04-06 unit weights...............................................14
Ductwork..................................................................19
Condensate drain....................................................20
Compressors............................................................20
Filters........................................................................ 21
Power and control wiring.......................................21
Typical field power and control wiring.......................23
Typical power wiring...............................................23
Electrical data.......................................................... 24
ZL04 to 06 standard indoor blower - with
powered convenience outlet........................... 24
ZL04 to 06 standard indoor blowers -
without powered convenience outlet.............26
ZL04 to 06 medium indoor blower - with
powered convenience outlet........................... 28
ZL04 to 06 medium indoor blower -
without powered convenience outlet.............30
ZL04 to 06 high indoor blower - with
powered convenience outlet........................... 32
ZL04 to 06 high indoor blower - without
powered convenience outlet........................... 33
Physical data............................................................35
ZL04 to ZL06 physical data............................... 36
Optional gas heat....................................................41
Options and accessories........................................ 44
Blower phasing........................................................44
Airflow performance...............................................49
ZL04 to ZL06 side duct application (belt
drive)...................................................................50
ZL04 to ZL06 side duct application (direct
drive)...................................................................52
ZL04 to ZL06 bottom duct application
(belt drive)..........................................................53
ZL04 to ZL06 bottom duct application
(direct drive).......................................................55
RPM selection.................................................... 55
Indoor blower specifications........................... 56
Smart Equipment™ unit control board...........59
Operation.......................................................................64
Cooling sequence of operation............................. 64
Smart Equipment™ economizer board
details....................................................................... 67
Indoor air quality (IAQ).......................................... 70
Gas heating operation............................................70
Gas heat ignition control board function (non
Ultra-Low NOx models only)....................................... 71
Ignition control board on standby........................71
Call for heat..............................................................71
Pressure switch proving.........................................71
Pre-purge................................................................. 71
Ignition trial period.................................................71
Flame stabilization period......................................71
Main burner operation...........................................71
Post purge................................................................72
Lockout.....................................................................72
High temperature limit switch...............................72
Roll-out switch......................................................... 72
Power interruptions................................................72
Flame present with gas off.................................... 72
Welded gas valve relay response..........................72
Gas heat ignition control board function
(Ultra-Low NOx)............................................................ 73
Ignition control board on standby........................73
Call for heat..............................................................73
Combustion air proving......................................... 73
Pre-purge................................................................. 73
Ignition trial period.................................................73
Main burner operation...........................................73
Post purge................................................................73
Ignition failures....................................................... 73
High temperature limit switches...........................73
Burner inlet pressure switch..................................74
Power interruptions................................................74
Flame present with gas off.................................... 74
Gas valve fault......................................................... 74
Diagnostic fault code storage and retrieval.........74
Cooling start-up............................................................ 75
Prestart checklist.....................................................75
Operating instructions........................................... 75
Post start checklist.................................................. 75
Gas heat start-up.......................................................... 76
Pre-start checklist....................................................76
Operating instructions........................................... 76
Johnson Controls Ducted Systems
Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A 3

Lighting the main burners..............................................76
Post start checklist........................................................... 76
Shut down......................................................................... 76
Checking gas heat input....................................................... 77
Two-stage gas heat..........................................................77
Manifold gas pressure adjustment................................78
Single stage.................................................................78
Two-stage....................................................................78
Adjustment of temperature rise.................................... 80
Burners/orifices inspection/servicing (non
Ultra-Low NOx models only)...........................................80
Start up for units equipped for fan energy rating....... 81
Direct drive..................................................................81
Troubleshooting.....................................................................82
Charging tables................................................................ 87
Smart Equipment™ Control board navigation
components............................................................................89
Start-Up sheet........................................................................ 90
Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A4
Johnson Controls Ducted Systems

General
ZL units are single package air conditioners
with optional gas heating designed for outdoor
installation on a rooftop or slab and for non-
residential use.
These units are completely assembled on rigid,
permanently attached base rails. All piping,
refrigerant charge, and electrical wiring is
factory installed and tested. The units require
electric power, gas supply (where applicable),
and duct connections.
Safety considerations
This is a safety alert symbol. When you see
this symbol on labels or in manuals, be alert to
the potential for personal injury.
Understand and pay particular attention the
signal words DANGER, WARNING or CAUTION.
DANGER indicates an imminently hazardous
situation, which, if not avoided, will result in
death or serious injury.
WARNING indicates a potentially hazardous
situation, which, if not avoided, could result in
death or serious injury.
CAUTION indicates a potentially hazardous
situation, which, if not avoided may result
in minor or moderate injury. It is also used
to alert against unsafe practices and hazards
involving only property damage.
WARNING
Improper installation may create a condition
where the operation of the product could cause
personal injury or property damage. Improper
installation, adjustment, alteration, service
or maintenance can cause injury or property
damage. Refer to this manual for assistance
or for additional information, consult a qualified
contractor, installer or service agency.
CAUTION
This product must be installed in strict
compliance with the installation instructions and
any applicable local, state and national codes
including, but not limited to building, electrical,
and mechanical codes.
WARNING
Before performing service or maintenance
operations on unit, turn off main power switch
to unit. Electrical shock could cause personal
injury. Improper installation, adjustment,
alteration, service or maintenance can cause
injury or property damage. Refer to this manual.
For assistance or additional information consult
a qualified installer, service agency or the gas
supplier.
CAUTION
This system uses R-410A Refrigerant which
operates at higher pressures than R-22. No
other refrigerant may be used in this system.
Gauge sets, hoses, refrigerant containers
and recovery systems must be designed to
handle R-410A. If you are unsure, consult the
equipment manufacturer. Failure to use R-410A
compatible servicing equipment may result in
property damage or injury.
5Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A
Johnson Controls Ducted Systems

WARNING
If the information in this manual is not followed
exactly, a fire or explosion may result causing property
damage, personal injury or loss of life.
Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
WARNING
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow safety warnings exactly could result in
dangerous operation, serious injury, death or property
damage.Improper servicing could result in dangerous
operation, serious injury, death or property damage.
• Before servicing, disconnect all electrical power to
furnace.
• When servicing controls, label all wires prior to
disconnecting. Reconnect wires correctly.
• Verify proper operation after servicing.
Due to system pressure, moving parts, and electrical
components, installation and servicing of air
conditioning equipment can be hazardous. Only
qualified, trained service personnel should install,
repair, or service this equipment. Untrained
personnel can perform basic maintenance functions
of cleaning coils and filters and replacing filters.
Observe all precautions in the literature, labels,
and tags accompanying the equipment whenever
working on air conditioning equipment. The
installation must conform with local building codes
or, in the absence of local codes, with the National
Fuel Gas Code, ANSI Z223.1/NFPA 54, and/or the
National Gas and Propane Installation Code, CSA
B149.1.
Wear safety glasses and work gloves. Use
quenching cloth and have a fire extinguisher
available during brazing operations.
Inspection
As soon as a unit is received, it should be inspected
for possible damage during transit. If damage is
evident, the extent of the damage should be noted
on the carrier’s freight bill. A separate request for
inspection by the carrier’s agent should be made in
writing.
CAUTION
This product must be installed in strict compliance
with the enclosed installation instructions and any
applicable local, state and national codes including,
but not limited to, building, electrical, and mechanical
codes.
The furnace and its individual shut-off valve must
be disconnected from the gas supply piping system
during any pressure testing at pressures in excess of
1/2 PSIG.
Pressures greater than 1/2 PSIG will cause gas valve
damage resulting in a hazardous condition. If it is
subjected to a pressure greater than 1/2 PSIG, the
gas valve must be replaced.
The furnace must be isolated from the gas supply
piping system by closing its individual manual shut-
off valve during any pressure testing of the gas supply
piping system at test pressures equal to or less than
1/2 PSIG
Reference
Additional information is available in the following
reference forms:
• Technical guide - ZX/ZQ/ZY/ZL 04-14
• General installation - ZL04-06
• Economizer accessory :
• Vertical flow dry bulb economizer field
installed
Horizontal flow dry bulb economizer
field installed
• Power exhaust:
• Vertical flow dry bulb economizer field
installed
Horizontal flow dry bulb economizer
field installed
Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A6
Johnson Controls Ducted Systems

Renewal parts
Contact your local ducted systems parts distribution
center for authorized replacement parts.
Approvals
Design certified by CSA as follows:
1. For use as a cooling only unit, cooling unit
with a forced air furnace.
2. For outdoor installation only.
3. For installation on combustible material and
may be installed directly on combustible
flooring or, in the U.S., on wood flooring
or Class A, Class B or Class C roof covering
materials.
4. For use with natural gas.
CAUTION
This product must be installed in strict
compliance with the enclosed installation
instructions and any applicable local, state,
and national codes including, but not limited to,
building, electrical, and mechanical codes.
WARNING
Improper installation may create a condition
where the operation of the product could cause
personal injury or property damage.
CAUTION
This system uses R-410A Refrigerant which
operates at higher pressures than R-22. No
other refrigerant may be used in this system.
Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A 7
Johnson Controls Ducted Systems

Nomenclature
Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A8
Johnson Controls Ducted Systems

Installation
Installation safety information
About this task:
Read these instructions before continuing
this appliance installation. This is an outdoor
combination heating and cooling unit. The installer
must assure that these instructions are made
available to the consumer and with instructions to
retain them for future reference.
1. Refer to the unit rating plate for the approved
type of gas for this product.
2. Install this unit only in a location and position
as specified in Location of these instructions.
3. Never test for gas leaks with an open flame.
Use commercially available soap solution
made specifically for the detection of leaks
when checking all connections, as specified
in Installation safety information, Gas
connection, and Post start checklist of these
instructions.
4. Always install furnace to operate within the
furnace's intended temperature-rise range
with the duct system and within the allowable
external static pressure range, as specified
on the unit name/rating plate, specified in of
these instructions.
5. This equipment is not to be used for
temporary heating of buildings or structures
under construction.
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warning exactly
could result in serious injury, death or property
damage.
Never test for gas leaks with an open flame.
Use a commercially available soap solution
made specifically for the detection of leaks
to check all connections. A fire or explosion
may result causing property damage, personal
injury or loss of life.
Preceding installation
About this task:
Read these instructions before you perform the
installation. Complete the following steps:
1. Remove the two screws that hold the brackets
in the forklift slots on the side of the unit.
Figure 1: Unit shipping bracket
Item Description
A Bracket screws
B Bracket
2. Turn each bracket toward the ground. The
protective cardboard covering drops to the
ground.
3. Remove the protective covering from the
condenser coil before operation.
Figure 2: Protective condenser covering
4. If a factory option convenience outlet is
installed, you must install the weatherproof
outlet cover in the field. The cover is located
behind the filter access panel.
a. Remove the shipping label that covers
the convenience outlet.
b. Follow the instructions on the back of
the cover box.
c. Attach the cover to the unit with the
four screws provided.
Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A 9
Johnson Controls Ducted Systems

CAUTION
208/230-3-60 and units with factory
installed Powered Convenience Outlet
Option are wired for 230 V power
supply. Change tap on transformer for
208-3-60 operation. See unit wiring
diagram.
5. For gas heating models equipped with
Smart Equipment™ control, you must move
the supply air temperature (SAT) sensor to
the working position to ensure proper SAT
readings. The SAT sensor is shipped in the
supply air compartment.
a. Move the SAT sensor to the inside
of the supply air duct. See Item A in
Figure 5.
b. Use the excess wire available to its
full length to drop or mount the SAT
sensor in the duct. Avoid close contact
with the gas heat exchanger.
c. Use the shipping bracket to hold the
SAT sensor in the supply air stream.
See Figure 3 for the factory SAT sensor
location and Figure 5 for the sensor
relocation.
Figure 3: Supply air temperature sensor
6. For units equipped with an economizer or
motorized OD air damper, you must move
the return air temperature (RAT) sensor to
the working position to ensure correct RAT
readings. See Item B in Figure 5.
a. Move the RAT sensor to the inside
of the return air duct verifying that
the sensor is at least 6 in. below the
unit duct opening. The sensor must
read the return air temperature not
mixed return air and outdoor air
temperatures.
b. Use the excess wire available to its
full length to drop or mount the RAT
sensor in the duct.
c. You can use the shipping bracket to
hold the RAT sensor in the return air
stream. See Figure 4 for the factory
RAT sensor location and Figure 5 for
the sensor relocation.
Figure 4: Factory-mounted return air
temperature sensor
Item Description
A Filter rack and filters
B RAT sensor
Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A10
Johnson Controls Ducted Systems

Figure 5: Supply and return air ducts
Item Description
A Supply air duct
B Return air duct
7. If an optional return air smoke detector
is installed, you must move the return air
sensor from the factory shipped upside down
position to the working, right-side up position.
Then slide the flex tube over the stub and
tighten, see Figure 7.
Figure 6: Return air smoke detector - shipped
position
Item Description
A Flex tube secured to the bracket
B Return air sensor
C Controller
D Wire tie
Figure 7: Return air smoke detector - working
position
Item Description
A Controller
B Return air sensor
C Flex tube in the
working position
Limitations
These units must be installed in accordance with the
following standards:
In U.S.A and Canada:
• Gas-Fired Central Furnace Standard , ANSI
Z21.47 - CSA 2.3 - Latest Edition
In U.S.A.:
• National Electrical Code, ANSI/NFPA No. 70 -
latest edition
• National Fuel Gas Code, ANSI Z223.1 - latest
edition
• Gas-Fired Central Furnace Standard, ANSI
Z21.47a. - latest edition
• Local building codes
• Local gas utility requirements
In Canada:
• Canadian Electrical Code, CSA C22.1
• Installation Codes, CSA - B149.1
• Local plumbing and waste water codes, and
• Other applicable local codes.
See to unit application data found in this document.
Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A 11
Johnson Controls Ducted Systems

After installation, gas fired units must be adjusted to
obtain a temperature rise within the range specified
on the unit rating plate.
If components are to be added to a unit to meet
local codes, they are to be installed at the dealer’s or
customer’s expense.
The size of a unit for proposed installation should
be based on heat loss and heat gain calculation
made according to the methods of Air Conditioning
Contractors of America (ACCA).
Do not use the furnace for temporary heating of
buildings or structures under construction.
Table 1: ZL04-12 unit limitations
Unit limitations
Applied voltage Outdoor DB temp
Model Size
(ton)
Unit voltage SCCR (kVA)
Minimum Maximum Maximum (°F)
208/230-1-60 5 187 252 125
208/230-3-60 5 187 252 125
460-3-60 5 432 504 125
ZL 04
(3)
575-3-60 5 540 630 125
208/230-3-60 5 187 252 125
460-3-60 5 432 504 125
ZL 05
(4)
575-3-60 5 540 630 125
208/230-3-60 5 187 252 125
460-3-60 5 432 504 125
ZL 06
(5)
575-3-60 5 540 630 125
Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A12
Johnson Controls Ducted Systems

Location
Use the following guidelines to select a suitable
location for these units:
1. The unit is designed for outdoor installation
only.
2. The condenser coils must have an unlimited
supply of air. Where a choice of location
is possible, position the unit on either the
northern or eastern side of building.
3. Suitable for mounting on roof curb.
4. For ground level installation, use a level
concrete slab with a minimum thickness of 4
in. The length and width should be at least 6
in. greater than the unit base rails. Do not tie
slab to the building foundation.
5. Roof structures must be able to support
the weight of the unit and its options and
accessories. The unit must be installed on a
solid, level roof curb or appropriate angle iron
frame.
6. Maintain level tolerance to 1/2 in. across the
entire width and length of unit.
WARNING
Excessive exposure of this furnace to
contaminated combustion air will result in
safety and performance related problems.
Typical contaminates include: permanent wave
solution, chlorinated waxes and cleaners,
chlorine based swimming pool chemicals,
water softening chemicals, de-icing salts or
chemicals, carbon tetrachloride, Halogen
type refrigerants, cleaning solvents (e.g.
perchloroethylene), printing inks, paint
removers, varnishes, hydrochloric acid,
cements and glues, anti-static fabric softeners
for clothes dryers, masonry acid washing
materials.
Clearances
All units require particular clearances for correct
operation and service. Installer must make
provisions for adequate combustion and ventilation
air in accordance with section 5.3 of Air for
Combustion and Ventilation of the National Fuel
Gas Code, ANSI Z223.1 – Latest Edition (in U.S.A.),
or Sections 7.2, 7.3, or 7.4 of Gas Installation
Codes, CSA-B149.1 (in Canada) - Latest Edition,
and/or applicable provisions of the local building
codes. Refer to and for clearances required for
combustible construction, servicing, and correct unit
operation.
WARNING
Do not permit overhanging structures or shrubs to
obstruct condenser air discharge outlet, combustion
air inlet or vent outlets.
Rigging and handling
Exercise care when moving the unit. Do not remove
any packaging until the unit is near the place of
installation. Rig the unit by attaching chain or cable
slings to the lifting holes provided in the base rails.
Spreader bars, whose length exceeds the largest
dimension across the unit, MUST be used across the
top of the unit.
CAUTION
If a unit is to be installed on a roof curb other than
a DS roof curb, gasketing must be applied to all
surfaces that come in contact with the unit underside.
CAUTION
Before lifting, make sure the unit weight is distributed
equally on the rigging cables so it will lift evenly.
Units may be moved or lifted with a forklift. Slotted
openings in the base rails are provided for this
purpose.
LENGTH OF FORKS MUST BE A MINIMUM OF 60
IN.
CAUTION
All panels must be secured in place when the unit is
lifted.
The condenser coils should be protected from rigging
cable damage with plywood or other suitable material.
Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A 13
Johnson Controls Ducted Systems

ZL04-06 unit weights
Figure 8: Unit 4 point load weight Figure 9: Unit 6 point load weight
Figure 10: Center of gravity
Table 2: ZL04-06 corner weights
Weight (lb) Center of gravity 4 point load location (lb) 6 point load location (lb)Model Size
(ton) Shipping Operating X Y A B C D A B C D E F
ZLE 04 (3) 486 481 42 27 112 147 126 96 71 85 103 88 73 61
ZLE 05 (4) 569 564 36 26 153 145 130 137 103 99 96 86 89 92
ZLE 06 (5) 587 582 37 24 141 142 150 149 94 94 95 100 100 99
ZLG 04 (3) 560 555 42 27 129 170 146 111 82 98 118 102 84 71
ZLG 05 (4) 607 602 36 26 163 155 139 146 109 106 102 92 95 98
ZLG 06 (5) 636 631 37 25 160 160 156 155 106 107 107 104 104 103
Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A14
Johnson Controls Ducted Systems

Table 3: ZL04-06 unit accessory
weights
Unit accessory Weights (lb)
Vertical flow dry bulb economizer small
footprint
55
Horizontal flow dry bulb economizer
small footprint short
74
Horizontal flow dry bulb economizer
small footprint tall
76
Power exhaust vertical flow small
footprint
55
Power exhaust horizontal flow small
footprint
40
Hail guard kit small short factory installed 18
Hail guard kit small tall factory installed 23
Flue extension kit (1FE0414) 15
Flue extension kit (1FE0415) 17
Flue extension kit (1FE0416) 20
Curb rigid 14 in. small footprint 94
Curb rigid 24 in. small footprint 148
Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A 15
Johnson Controls Ducted Systems

Figure 11: ZL04 unit dimensions
Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A16
Johnson Controls Ducted Systems

Figure 12: ZL05-06 unit dimensions
Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A 17
Johnson Controls Ducted Systems

Table 4: ZL04-06 unit clearances
Direction Distance (in.) Direction Distance (in.)
Top1172 Right 18
Front 36 Left 12
Rear 3622Bottom331
1 Units must be installed outdoors. Overhanging structure or
shrubs should not obscure condenser air discharge outlet.
2 Units equipped with an economizer or power exhaust. Flue
products must not be discharged within 10 ft of the rear of
the unit.
3 Units may be installed on combustible floors made from
wood or from class A, B, or C roof covering materials.
Figure 13: 1RC0456, 1RC0458 roof curb dimensions
Table 5: Unit models used with 1RC0456, 1RC0458
roof curb
• ZL04
• ZL05
• ZL06
Note: If utilities are required through the
base of the unit or through the roof curb the
following field installed accessories can be
purchased through your dealer or contractor:
1TB0401 - through the base electrical and
through the curb gas
1TB0403 - through the base electrical and gas
Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A18
Johnson Controls Ducted Systems

Ductwork
Ductwork should be designed and sized according
to the methods in Manual D of the Air Conditioning
Contractors of America (ACCA) or as recommended
by any other recognized authority such as ASHRAE
or SMACNA.
A closed return duct system should be used. This
will not preclude use of economizers or outdoor
fresh air intake. The supply and return air duct
connections at the unit should be made with flexible
joints to minimize noise.
The supply and return air duct systems should
be designed for the CFM and static pressure
requirements of the job. They should NOT be sized
to match the dimensions of the duct connections on
the unit.
Refer to through for bottom and side air duct
openings.
Duct covers
Units are shipped with the side duct openings
covered and a covering over the bottom of the unit.
For side duct application, remove the side duct
covers and install over the bottom duct openings.
The panels removed from the side duct connections
are designed to be reused by securing each panel
to its respective bottom duct opening. But keep
in mind that the supply and return panels are
installed with the painted surface DOWN, facing the
bottom duct opening. The gasket must be removed
from the insulation side of the duct cover so it is
not directly exposed to the heating elements. The
panels are secured by sliding them into slots in the
back of the duct openings and screwing them to the
base of the unit with screws. Use screws removed
from original panel location. Seals around duct
openings must be tight.
CAUTION
When fastening ductwork to side duct flanges on unit,
insert screws through duct flanges only. DO NOT
insert screws through casing. Outdoor ductwork must
be insulated and water-proofed.
Figure 14: Side duct cover panels
Note: Shown with duct connection cover panel
as shipped.
Figure 15: Bottom return opening for side duct
conversion
Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A 19
Johnson Controls Ducted Systems

Figure 16: Bottom supply opening for side duct
conversion
Condensate drain
A side condensate drain is provided to facilitate
condensate piping. A condensate drain connection
is available through the base pan for piping inside
the roof curb. Trap the connection as shown in
Figure 17. The trap and drain lines should be
protected from freezing.
Plumbing must conform to local codes. Use a
sealing compound on male pipe threads. Install
condensate drain line from the 3/4 in. NPT female
connection on the unit to an open drain.
Figure 17: Condensate drain
The condensate drain connection locations are
shown in Figure 18. The inside drain plumbing,
which is not supplied, must conform to local code.
Note: The drain pan comes with the inside
drain plugged. To use the inside drain remove
the plug from the inside drain and plug the
outside drain hole.
Figure 18: Drain connection locations
Compressors
The compressor used in this product is specifically
designed to operate with R-410A refrigerant and
cannot be interchanged.
CAUTION
This system uses R-410A Refrigerant which operates
at higher pressures than R-22. No other refrigerant
may be used in this system.
The compressor also uses a refrigerant oil that is
extremely hygroscopic, meaning it absorbs water
readily. They can absorb 15 times as much water as
other oils designed for HCFC and CFC refrigerants.
Take all necessary precautions to avoid exposure of
the oil to the atmosphere.
CAUTION
Do not leave the system open to the atmosphere. Unit
damage could occur due to moisture being absorbed
by the refrigerant in the system. This type of oil is
highly susceptible to moisture absorption.
R-410A compressor lubricants are known to cause
long term damage to some synthetic roofing
materials.
Installation Manual ZL Series 3 ton to 5 ton 60 Hz R-410A20
Johnson Controls Ducted Systems