AAON RZ Series Owner's manual

RZ SERIES
Packaged Rooftop Units & Outdoor Air Handling Units
Installation, Operation,
& Maintenance
oDo not store gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance
oWHAT 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.
Leave the building immediately.

Immediately call your gas supplier from a
phone remote from the building. Follow the
gas supplier’s instructions.

If you cannot reach your gas supplier, call
the fire department.
oStartup and service must be performed by a
Factory Trained Service Technician.
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings
exactly could result in serious
injury, death or property damage.
Be sure to read and understand
the installation, operation and
service instructions in this manual.
Improper installation, adjustment,
alteration, service or maintenance
can cause serious injury, death or
property damage.
A copy of this IOM must be kept
with the unit.
WARNING

3
Table of Contents
Table of Contents
AAON® RZ Series Features and Options Introduction ................................................................. 7
Safety .............................................................................................................................................. 8
RZ Series Feature String Nomenclature ....................................................................................... 14
General Information...................................................................................................................... 25
Codes and Ordinances .............................................................................................................. 26
Receiving Unit.......................................................................................................................... 26
Storage ...................................................................................................................................... 27
Packaged Direct Expansion (DX) Units................................................................................... 27
Gas or Electric Heating............................................................................................................. 28
Wiring Diagrams....................................................................................................................... 29
Condensate Drain Pan............................................................................................................... 29
Installation..................................................................................................................................... 29
Locating Units........................................................................................................................... 29
Curb Installation ....................................................................................................................... 30
Lifting the Unit ......................................................................................................................... 31
Duct Connection....................................................................................................................... 34
Reassembling Split Units.......................................................................................................... 35
Refrigeration Split Installation Procedure ................................................................................ 36
Electrical Connection of Split Units......................................................................................... 36
Outside Air Rain Hood............................................................................................................. 37
End Flashing Installation .......................................................................................................... 37
Vestibule Exhaust Fan.............................................................................................................. 38
Electrical................................................................................................................................... 39
Variable Speed Compressors.................................................................................................... 41
Gas Heating............................................................................................................................... 42
Piping Sizing Example.......................................................................................................... 43
Inlet and Manifold Pressures................................................................................................ 43
Gas Pressure Regulator & Overpressure Protection Device............................................... 43
Piping Supports..................................................................................................................... 44
Additional Gas Piping Considerations................................................................................. 44
Leak Testing.......................................................................................................................... 45
Rain Hoods............................................................................................................................ 46
Condensate Drain Piping.......................................................................................................... 46
Draw-Through Coils................................................................................................................. 47
Heating Coils ............................................................................................................................ 49
Chilled Water Coil.................................................................................................................... 49
Aluminum Energy Recovery Wheel......................................................................................... 50
Polymer Energy Recovery Wheel............................................................................................. 52
Startup........................................................................................................................................... 55
Supply, Return, and Exhaust Backward Curved Fans.............................................................. 55
Airflow Adjustment................................................................................................................ 55
Back Draft Damper Setup......................................................................................................... 57

4
Filters........................................................................................................................................ 58
Cartridge Filter Installation....................................................................................................... 58
Energy Recovery Wheel........................................................................................................... 58
Adjusting Refrigerant Charge................................................................................................... 59
Before Charging.................................................................................................................... 59
Checking Liquid Sub-Cooling............................................................................................... 59
Checking Evaporator Superheat........................................................................................... 60
Adjusting Sub-cooling and Superheat Temperatures ........................................................... 61
Refrigerant Filter Driers............................................................................................................ 62
Suction Filter............................................................................................................................. 63
Suction Filter Removal Instructions......................................................................................... 63
Freeze Stat Startup.................................................................................................................... 64
Indirect Gas Heat Startup.......................................................................................................... 65
VFD Controlled Condenser Fan Startup................................................................................... 66
Low Sound Condenser Fan EC Motor Startup......................................................................... 66
Access Doors ............................................................................................................................ 67
Operation....................................................................................................................................... 68
Indirect Gas Heater Operation.................................................................................................. 68
Electric Heating Operation ....................................................................................................... 68
Steam or Hot Water Preheating and Heating Operation........................................................... 68
Packaged DX Cooling Operation ............................................................................................. 68
Chilled Water or Non-Compressorized DX Cooling Operation............................................... 68
Energy Recovery Wheel Defrost Timer .................................................................................. 69
Maintenance.................................................................................................................................. 70
Gas Heating............................................................................................................................... 70
Gas Heat Exchanger Removal.................................................................................................. 71
DX Cooling............................................................................................................................... 71
Condensate Drain Pans............................................................................................................. 71
Supply Fans............................................................................................................................... 72
Lubrication............................................................................................................................ 72
Filter Replacement.................................................................................................................... 72
Energy Recovery Wheel........................................................................................................... 72
Brazed Plate Heat Exchanger Cleaning.................................................................................... 78
Air-Cooled Condenser.............................................................................................................. 79
E-Coated Coil Cleaning............................................................................................................ 79
Microchannel Coil Cleaning..................................................................................................... 81
Filter Replacement.................................................................................................................... 82
Replacement Parts..................................................................................................................... 83
Appendix A - Heat Exchanger Corrosion Resistance................................................................... 84
Appendix B - Thermistor Temperature vs. Resistance Values..................................................... 86
RZ Series Startup Form ................................................................................................................ 87
Maintenance Log (E-Coated Coil)................................................................................................ 94
Literature Change History............................................................................................................. 95
G074290 · Rev. A · 200914

5
Index of Tables and Figures
Tables
Table 1 - Electric Heating Capacities .........................................................................................................28
Table 2 - RZ 45-140 ton Gas Heating Capacities.......................................................................................29
Table 3 - RZ 145-240 ton Gas Heating Capacities.....................................................................................29
Table 4 - Air-Cooled Condenser Unit Clearances 45-240 ton....................................................................30
Table 5 - Evaporative Condenser Unit Clearances 45-240 ton...................................................................30
Table 6 - Mounting Dimensions .................................................................................................................34
Table 7 - Nameplate Voltage Markings & Tolerances ...............................................................................39
Table 8 - RZ Variable Speed Compressor VFD Frequency Range............................................................41
Table 9 - RZ 45-140 ton Unit Gas Piping Connections..............................................................................42
Table 10 - RZ 145-240 ton Unit Gas Piping Connections..........................................................................42
Table 11 - Natural Gas Maximum Piping Capacities (ft3/hr)......................................................................42
Table 12 - Propane (kBtu/hr) Maximum Piping Capacities........................................................................43
Table 13 - Piping Support Intervals............................................................................................................44
Table 14 - Draw-Through Drain Trap Dimensions.....................................................................................48
Table 15 - Blow-Through Drain Trap Dimensions.....................................................................................48
Table 19 - Plenum Fan Set Screw Specifications .......................................................................................56
Table 20 - Acceptable Fin & Tube Sub-Cooling and Superheat Temperatures..........................................60
Table 21 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-Cooling Values................61
Table 22 - Filter Drier Maximum Pressure Drop........................................................................................62
Table 23 - R-410A Refrigerant Temperature-Pressure Chart.....................................................................64
Table 24 - EC Condenser Fan Cycling Options..........................................................................................66
Table 26 - RZ Series Filter Sizes................................................................................................................83

6
Figures
Figure 1 - RZ Series Unit Orientation.........................................................................................................30
Figure 2 - Base Rail Lifting Lug.................................................................................................................31
Figure 3 - 4 Point Lift RZ Series Air-Cooled Condenser Unit...................................................................32
Figure 4 - 8 Point Lift RZ Series Air-Cooled Condenser Unit...................................................................33
Figure 5 - Curb Mounting...........................................................................................................................34
Figure 6 - Curb Detail.................................................................................................................................34
Figure 7 - Curb & Steel Mounting Rail with Dimensions..........................................................................34
Figure 8 - Unit Base and Sides....................................................................................................................35
Figure 9 - Unit Roof Flange Splice Detail..................................................................................................35
Figure 10 - Staggered assembly for refrigeration pipes..............................................................................36
Figure 11 - Air Hood Shown in the Open Position.....................................................................................37
Figure 12 - Factory Supplied End Flashings...............................................................................................37
Figure 13 - Vestibule Exhaust Fan..............................................................................................................38
Figure 14 - Motorized Exhaust ...................................................................................................................38
Figure 15 - Power Block.............................................................................................................................40
Figure 16 - Gas Heater Rain Hood..............................................................................................................46
Figure 17 - Gas Heater Rain Hood Screws.................................................................................................46
Figure 18 - Draw-Through Drain Trap.......................................................................................................47
Figure 19 - Blow-Through Drain Trap .......................................................................................................48
Figure 21 - Aluminum Energy Recovery Wheel ........................................................................................50
Figure 22 - Polymer Energy Recovery Wheel............................................................................................52
Figure 23 - Air Volume Band.....................................................................................................................56
Figure 24 - Air Volume Band Tab Locations.............................................................................................56
Figure 25 - Securing Air Volume Band Ends.............................................................................................56
Figure 26 - Plenum Fan Gap Tolerances ....................................................................................................57
Figure 27 - Closed Back Draft Damper......................................................................................................57
Figure 28 - Open Back Draft Damper.........................................................................................................57
Figure 31 - Top Clip and Side Spring Fastener Securing Filters in Place ..................................................58
Figure 29 - Replaceable Core Liquid Filter/Driers.....................................................................................62
Figure 30 - RPE-48-BD filter element........................................................................................................63
Figure 31 - Lockable Door Handles............................................................................................................67
Figure 32 - Defrost Timer...........................................................................................................................69
Figure 33 - Temperature Dial......................................................................................................................69
Figure 34 - Gas Heat Exchanger.................................................................................................................71
Figure 35 - Wheel Segment Removal Pattern.............................................................................................74

7
AAON® RZ Series Features and Options Introduction
Energy Efficiency
Direct Drive Airfoil Plenum Supply Fans
Variable Speed R-410A Scroll
Compressors
AAON Evaporative Condenser
Airside Economizer
Factory Installed AAONAIRE®Energy
Recovery Wheels
Double Wall Rigid Polyurethane Foam
Panel Construction, R-13 Insulation
Modulating Natural Gas Heaters
Modulating/SCR Electric Heaters
Premium Efficiency Permanent Magnet
Motors
Variable Speed Supply/Return/Exhaust
Fans
Indoor Air Quality
100% Outside Air
Outside Airflow Monitoring
Economizer CO2Override
High Efficiency Filtration
Final Filters, including Gas Heat Systems
UV Lights for Coil Cleaning
UV Lights for Single Pass 90% Air
Disinfection
Double Wall Rigid Polyurethane Foam
Panel Construction, R-13 Insulation
Interior Corrosion Protection
Humidity Control
High Capacity Cooling Coils
Variable Speed Compressors
Factory Installed AAONAIRE Total
Energy Recovery Wheels
Modulating Hot Gas Reheat
Safety
Burglar Bars
Freeze Stats
Phase and Brown Out Protection
Supply/Return Smoke Detectors
Supply/Return Firestats
Remote Safety Shutdown Terminals
Installation and Maintenance
Clogged Filter Switch
Color Coded Wiring Diagram
Compressors in Isolated Compartment
Compressor Isolation Valves
Convenience Outlet
Direct Drive Supply Fans
VFD Shaft Grounding
Hinged Access Doors with Lockable
Handles
Magnehelic Gauge
Service Lights
Sight Glasses
BACnet MSTP with Diagnostics
Remote Start-Stop Terminals
Access Door Windows
Motorized Fresh Air Service Vestibule
System Integration
Chilled Water Cooling Coils
Electric/Natural Gas/LP Heating
Hot Water/Steam Heating Coil
Non-Compressorized DX Coils
Environmentally Friendly
Airside Economizers
Factory Installed AAONAIRE Energy
Recovery Wheels
R-410A Refrigerant
Extended Life
5 Year Compressor Warranty
25 Year Stainless Steel Heat Exchanger
Warranty
Interior Corrosion Protection
Polymer E-Coated Coils - 5 Year Coating
Warranty
Stainless Steel Coil Casing
Stainless Steel Drain Pans

8
Safety
ELECTRIC 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 the furnace.
More than one disconnect may be
provided.
When servicing controls, label all
wires prior to disconnecting.
Reconnect wires correctly.
Verify proper operation after
servicing. Secure all doors with
key-lock or nut and bolt.
WARNING
WHAT TO DO IF YOU SMELL GAS
Do not try to turn on unit.
Shut off main gas supply.
Do not touch any electric switch.
Do not use any phone in the
building.
Never test for gas leaks with an
open flame.
Use a gas detection soap solution
and check all gas connections and
shut off valves.
CAUTION
Electric shock hazard. Shut off all
electrical power to the unit to avoid
shock hazard or injury from rotating
parts.
WARNING
Attention must be paid to the following statements:
NOTE - Notes are intended to clarify the unit installation, operation and maintenance.
CAUTION - Caution statements are given to prevent actions that mayresult in equipment
damage, property damage, or personal injury.
WARNING - Warning statements are given to prevent actions that could result in
equipment damage, property damage, personal injury or death.
DANGER - Danger statements are given to prevent actions that will result in equipment
damage, property damage, severe personal injury or death.
Electric shock hazard. Before
servicing, shut off all electrical power
to the unit, including remote
disconnects, to avoid shock hazard or
injury from rotating parts. Follow
proper Lockout-Tagout procedures.
WARNING

9
FIRE, EXPLOSION OR CARBON
MONOXIDE POISONING HAZARD
Failure to replace proper controls
could result in fire, explosion or
carbon monoxide poisoning. Failure to
follow safety warnings exactly could
result in serious injury, death or
property damage. Do not store or use
gasoline or other flammable vapors
and liquids in the vicinity of this
appliance.
WARNING
During installation, testing, servicing,
and troubleshooting of the equipment
it may be necessary to work with live
electrical components. Only a
qualified licensed electrician or
individual properly trained in handling
live electrical components must
perform these tasks.
Standard NFPA-70E, an OSHA
regulation requiring an Arc Flash
Boundary to be field established and
marked for identification of where
appropriate Personal Protective
Equipment (PPE) be worn, must be
followed.
WARNING
ROTATING COMPONENTS
Unit contains fans with moving parts
that can cause serious injury. Do not
open door containing fans until the
power to the unit has been
disconnected and fan wheel has
stopped rotating.
WARNING
CARBON MONOXIDE POISONING
HAZARD
Failure to follow instructions could
result in severe personal injury or
death due to carbon-monoxide
poisoning, if combustion products
infiltrate into the building.
Check that all openings in the outside
wall around the vent (and air intake)
pipe(s) are sealed to prevent
infiltration of combustion products into
the building.
Check that furnance vent (and air
intake) terminal(s) are not obstructed
in any way during all seasons.
WARNING
Unit power supply wire should be
only copper or aluminum.
CAUTION

10
VARIABLE FREQUENCY DRIVES
Do not leave VFDs unattended in
hand mode or manual bypass.
Damage to personnel or equipment
can occur if left unattended. When in
hand mode or manual bypass mode
VFDs will not respond to controls or
alarms.
WARNING
GROUNDING REQUIRED
All field installed wiring must be
completed by qualified personnel.
Field installed wiringmust comply with
NEC/CEC, local and state electrical
code requirements. Failure to follow
code requirements could result in
serious injury or death. Provide proper
unit ground in accordance with these
code requirements.
WARNING
Electric motor over-current protection
and overload protection may be a
function of the Variable Frequency
Drive to which the motors are wired.
Never defeat the VFD motor overload
feature. The overload ampere setting
must not exceed 115% of the electric
motors FLA rating as shown on the
motor nameplate.
CAUTION
UNIT HANDLING
To prevent injury or death, lifting
equipment capacity must exceed unit
weight by an adequate safety factor.
Always test-lift unit not more than 24
inches high to verify proper center of
gravity lift point to avoid unit damage,
injury or death.
WARNING
Failure to properly drain and vent coils
when not in use during freezing
temperature may result in coil and
equipment damage.
CAUTION
Rotation must be checked on all
MOTORS AND COMPRESSORS of 3
phase units at startup by a qualified
service technician. Scroll
compressors are directional and can
be damaged if rotated in the wrong
direction. Compressor rotation must
be checked using suction and
discharge gauges. Fan motor rotation
must be checked for proper operation.
Alterations must only be made at the
unit power connection
CAUTION
Do not use oxygen, acetylene or air in
place of refrigerant and dry nitrogen
for leak testing. A violent explosion
may result causing injury or death.
WARNING

11
WATER PRESSURE
Prior to connection of condensing
water supply, verify water pressure is
less than maximum pressure shown
on unit nameplate. To prevent injury
or death due to instantaneous release
of high pressure water, relief valves
must be field supplied on system
water piping.
WARNING
Always use a pressure regulator,
valves and gauges to control incoming
pressures when pressure testing a
system. Excessive pressure may
cause line ruptures, equipment
damage or an explosion which may
result in injury or death.
WARNING
Do not clean DX refrigerant coils with
hot water or steam. The use of hot
water or steam on refrigerant coils will
cause high pressure inside the coil
tubing and damage to the coil.
CAUTION
To prevent damage to the unit, do not
use acidic chemical coil cleaners. Do
not use alkaline chemical coil cleaners
with a pH value greater than 8.5, after
mixing, without first using an
aluminum corrosion inhibitor in the
cleaning solution.
CAUTION
Some chemical coil cleaning
compounds are caustic or toxic. Use
these substances only in accordance
with the manufacturer’s usage
instructions. Failure to follow
instructions may result in equipment
damage, injury or death.
WARNING
Door compartments containing
hazardous voltage or rotating parts
are equipped with door latches to
allow locks. Door latch are shipped
with nut and bolts requiring tooled
access. If you do not replace the
shipping hardware with a pad lock
always re-install the nut & bolt after
closing the door.
CAUTION
Cleaning the cooling tower or
condenser water loop with harsh
chemicals such as hydrochloric acid
(muriatic acid), chlorine or other
chlorides, can damage the refrigerant-
to-water heat exchanger. Care must
be taken to avoid allowing chemicals
to enter the refrigerant-to-water heat
exchanger. See Appendix A - Heat
Exchanger Corrosion Resistance for
more information.
CAUTION

12
WATER FREEZING
Failure of the condenser due to
freezing will allow water to enter the
refrigerant circuit and will cause
extensive damage to the refrigerant
circuit components. Any damage to
the equipment as a result of water
freezing in the condenser is excluded
from coverage under AAON
warranties and the heat exchanger
manufacturer warranties.
OPEN LOOP APPLICATIONS
Failure of the condenser as a result of
chemical corrosion is excluded from
coverage under AAON Inc. warranties
and the heat exchanger
manufacturer’s warranties.
WARNING
WARNING
COMPRESSOR CYCLING
3 MINUTE MINIMUM OFF TIME
To prevent motor overheating
compressors must cycle off for a
minimum of 3 minutes.
5 MINUTE MINIMUM ON TIME
To maintain the proper oil level
compressors must cycle on for a
minimum of 5 minutes.
The cycle rate must not exceed 7
starts per hour.
WARNING
WARNING

13
1. Startup and service must be performed by
a Factory Trained Service Technician.
2. Use only with type of the gas approved
for the furnace. Refer to the furnace rating
plate.
3. The unit is for outdoor use only. See
General Information section for more
information.
4. Provide adequate combustion ventilation
air to the furnace. If a vent duct extension
is used, a class III approved vent is
required. See the Locating Units and Gas
Heating sections of the Installation
section of the manual.
5. Always install and operate furnace within
the intended temperature rise range and
duct system external static pressure (ESP)
as specified on the unit nameplate.
6. The supply and return air ducts must be
derived from the same space. It is
recommended ducts be provided with
access panels to allow inspection for duct
tightness. When a down flow duct is used
with electric heat, the exhaust duct must
be an L shaped duct.
7. Clean furnace, duct, and components
upon completion of the construction
setup. Verify furnace operating
conditions including input rate,
temperature rise, and ESP.
8. Every unit has a unique equipment
nameplate with electrical, operational,
and unit clearance specifications.
Always refer to the unit nameplate for
specific ratings unique to the model you
have purchased.
9. READ THE ENTIRE INSTALLATION,
OPERATION, AND MAINTENANCE
MANUAL. OTHER IMPORTANT
SAFETY PRECAUTIONS ARE
PROVIDED THROUGHOUT THIS
MANUAL.
10. Keep this manual and all literature
safeguarded near or on the unit.
WARNING

14
RZ Series Feature String Nomenclature
GEN
MJREV
SIZE
SERIES
MNREV
VLT
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
1
2
3A
3B
3C
3D
3E
4A
4B
4C
5A
5B
5C
5D
5E
6A
6B
6C
6D
6E
7
8
9A
9B
9C
9D
RZ
A
-
145
-
D
0
-
3
-
C
A
B
0
A
-
0
0
0
0
0
:
N
0
-
A
A
K
A
Q
-
J
0
0
-
B
F
T
0
M
-
0
0
0
0
0
-
Q
F
-
A
0
A
A
-
0
0
-
M
0
-
C
-
0
0
0
-
8
0
-
D
A
0
B
-
0
0
-
0
0
0
-
A
B
E
Q
0
A
-
E
0
0
0
0
0
-
0
0
0
0
0
D
B
10A
10B
11A
11B
12
13A
13B
13C
14
15
16A
16B
16C
16D
17A
17B
18A
18B
18C
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
MODEL OPTIONS
SERIES AND GENERATION
RZ
MAJOR REVISION
A
UNIT SIZE
Air-Cooled Condenser
Evaporative Condenser
45 = 45 ton Capacity
51 = 51 ton Capacity
55 = 55 ton Capacity
66 = 66 ton Capacity
65 = 65 ton Capacity
73 = 73 ton Capacity
75 = 75 ton Capacity
79 = 79 ton Capacity
90 = 90 ton Capacity
101 = 101 ton Capacity
105 = 105 ton Capacity
109 = 109 ton Capacity
120 = 120 ton Capacity
124 = 124 ton Capacity
130 = 130 ton Capacity
136 = 136 ton Capacity
140 = 140 ton Capacity
148 = 148 ton Capacity
145 = 145 ton Capacity
161 = 161 ton Capacity
160 = 160 ton Capacity
172 = 172 ton Capacity
180 = 180 ton Capacity
197 = 197 ton Capacity
200 = 200 ton Capacity
221 = 221 ton Capacity
220 = 220 ton Capacity
241 = 241 ton Capacity
240 = 240 ton Capacity
261 = 261 ton Capacity
SERIES
A = 45-75 ton units
B = 90-105 ton units
C = 120-140 ton units
D = 145-180 ton units
E = 200-240 ton units
MINOR REVISION
0
VOLTAGE
2 = 230V/3 Φ/60Hz
3 = 460V/3 Φ/60Hz
4 = 575V/3 Φ/60Hz
8 = 208V/3 Φ/60Hz
Model Option A: COOLING/HEAT PUMP
A1: COMPRESSOR STYLE
0 = No Compressor
C = R-410A Variable Speed Scroll Compressor
A2: CONDENSER STYLE
0 = No Condenser
A = Microchannel Air-Cooled Condenser
H = Evaporative Condenser
A3: INDOOR COIL CONFIGURATION
0 = No Cooling Coil
A = Std Row Std Size Evaporator
B = 6 Row Std Size Evaporator
C = Std Row Large Size Evaporator
D = 6 Row Large Size Evaporator
E = 4 Row Chilled Water Coil Std Size
F = 6 Row Chilled Water Coil Std Size
G = 8 Row Chilled Water Coil Std Size
H = 4 Row Chilled Water Coil Large Size
J = 6 Row Chilled Water Coil Large Size
K = 8 Row Chilled Water Coil Large Size
A4: COOLING HEAT EXCHANGER
CONSTRUCTION
0 = Standard
A = Polymer E-Coated Cooling Coil
B = Stainless Steel Cooling Coil Casing
D = Stainless Steel Cooling Coil Casing + Polymer
E-Coated Cooling Coil
E = Polymer E-Coated Cond. Coil
J = Polymer E-Coated Evap. And Cond. Coil
T = Stainless Steel Cooling Coil Casing + Polymer E-
Coated Evap. And Cond. Coil

15
RZ Series Feature String Nomenclature
GEN
MJREV
SIZE
SERIES
MNREV
VLT
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
1
2
3A
3B
3C
3D
3E
4A
4B
4C
5A
5B
5C
5D
5E
6A
6B
6C
6D
6E
7
8
9A
9B
9C
9D
RZ
A
-
145
-
D
0
-
3
-
C
A
B
0
A
-
0
0
0
0
0
:
N
0
-
A
A
K
A
Q
-
J
0
0
-
B
F
T
0
M
-
0
0
0
0
0
-
Q
F
-
A
0
A
A
-
0
0
-
M
0
-
C
-
0
0
0
-
8
0
-
D
A
0
B
-
0
0
-
0
0
0
-
A
B
E
Q
0
A
-
E
0
0
0
0
0
-
0
0
0
0
0
D
B
10A
10B
11A
11B
12
13A
13B
13C
14
15
16A
16B
16C
16D
17A
17B
18A
18B
18C
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
A5: COOLING STAGING
0 = No Cooling
A = Full Face Variable Capacity + Tandem On/Off
Refrigeration Systems
F = Single Serpentine 8 FPI
G = Half Serpentine 8 FPI
H = Single Serpentine 10 FPI
J = Half Serpentine 10 FPI
K = Single Serpentine 12 FPI
L = Half Serpentine 12 FPI
Model Option B: HEATING
B1: HEAT TYPE
0 = No Heat
B = Electric Heat
D = Natural Gas Single Rack
E = Natural Gas Double Rack
G = LP Gas Single Rack
H = LP Gas Double Rack
K = Hot Water Coil
M = Steam Distributing Coil
B2: HEAT CONSTRUCTION
0 = Standard
B = Stainless Steel Heat Exchanger
D = High Altitude Stainless Steel Heat Exchanger
G = Polymer E-Coated Heating Coil
B3: HEAT DESIGNATION
0 = No Heat
1 = Heat 1
2 = Heat 2
3 = Heat 3
4 = Heat 4
5 = Heat 5
6 = Heat 6
7 = Heat 7
8 = Heat 8
B3: HEAT DESIGNATION Continued
A = 1 Row Size A
B = 1 Row Size B
C = 1 Row Size C
D = 1 Row Size D
E = 2 Row Size A
F = 2 Row Size B
G = 2 Row Size C
H = 2 Row Size D
B4: HEAT STAGING
0 = No Heat
A = 1 Stage
B = 2 Stage
C = 3 Stage
D = 4 Stage
E = 5 Stage
F = 6 Stage
G = 7 Stage
H = 8 Stage
V = 10 Stage
J = 12 Stage
K = Modulating Gas Heat Temp Control
L = High Turndown Modulating Gas Heat –
Temperature Control
M = Modulating SCR with Temperature Control
N = Modulating SCR with External 0-10 VDC
R = Single Serpentine 10 FPI
S = Half Serpentine 10 FPI
B5: HEAT PUMP AUX HEATING
0 = No Heat Pump

16
RZ Series Feature String Nomenclature
GEN
MJREV
SIZE
SERIES
MNREV
VLT
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
1
2
3A
3B
3C
3D
3E
4A
4B
4C
5A
5B
5C
5D
5E
6A
6B
6C
6D
6E
7
8
9A
9B
9C
9D
RZ
A
-
145
-
D
0
-
3
-
C
A
B
0
A
-
0
0
0
0
0
:
N
0
-
A
A
K
A
Q
-
J
0
0
-
B
F
T
0
M
-
0
0
0
0
0
-
Q
F
-
A
0
A
A
-
0
0
-
M
0
-
C
-
0
0
0
-
8
0
-
D
A
0
B
-
0
0
-
0
0
0
-
A
B
E
Q
0
A
-
E
0
0
0
0
0
-
0
0
0
0
0
D
B
10A
10B
11A
11B
12
13A
13B
13C
14
15
16A
16B
16C
16D
17A
17B
18A
18B
18C
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
1: UNIT ORIENTATION
E = Draw Through SA Fan, Walk-in Vestibule, Left
Side Access
F = Draw Through SA Fan, Walk-in Vestibule, Right
Side Access
L = Draw Through SA Fan, Non-compressorized,
Walk-in Vestibule, Left Access
M = Draw Through SA Fan, Non-compressorized,
Walk-in Vestibule, Right Access
N = Blow Through SA Fan, Walk-in Vestibule, Left
Side Access
P = Blow Through SA Fan, Walk-in Vestibule, Right
Side Access
U = Blow Through SA Fan, Non-compressorized,
Walk-in Vestibule, Left Access
V = Blow Through SA, Fan Non-compressorized,
Walk-in Vestibule, Right Access
2: SUPPLY & RETURN LOCATIONS
0 = Bottom Supply--Bottom Return
A = Bottom Supply--No Return
B = Bottom Supply--Left Return
C = Bottom Supply--Right Return
E = Left Supply--No Return
F = Left Supply--Bottom Return
G = Left Supply--Left Return
H = Left Supply--Right Return
K = Right Supply--No Return
L = Right Supply--Bottom Return
M = Right Supply--Left Return
N = Right Supply--Right Return
Q = Top Supply--No Return
R = Top Supply--Bottom Return
S = Top Supply--Left Return
T = Top Supply--Right Return
Feature 3: SUPPLY FAN OPTIONS
3A: SUPPLY FAN QUANTITY
0 = 1 Fan
A = 2 Fans
B = 3 Fans
C = 4 Fans
D = 5 Fans
E = 6 Fans
F = 7 Fans
G = 8 Fans
H = 9 Fans
J = 10 Fans
K = 11 Fans
L = 12 Fans
3B: SUPPLY FAN CONFIGURATION
0 = No VFDs + Full Width Fan
A = 1 Fan per VFD + Full Width Fan
E = No VFDs + Narrow Width Fan
F = 1 Fan per VFD + Narrow Width Fan
K = Option 0 + Inlet Backdraft Dampers
L = Option A + Inlet Backdraft Dampers
Q = Option E + Inlet Backdraft Dampers
R = Option F + Inlet Backdraft Dampers
3C: SUPPLY FAN SIZE
G = 27” Direct Drive Backward Curved Plenum
Aluminum
H = 30” Direct Drive Backward Curved Plenum
Aluminum
J = 30” Direct Drive Backward Curved Plenum Steel
K = 33” Direct Drive Backward Curved Plenum Steel
L = 36.5” Direct Drive Backward Curved Plenum
Aluminum
M = 42.5” Direct Drive Backward Curved Plenum
Aluminum
N = 18.5” Direct Drive Airfoil Plenum Aluminum
P = 22” Direct Drive Airfoil Plenum Aluminum
Q = 24” Direct Drive Airfoil Plenum Aluminum
R = 27” Direct Drive Airfoil Plenum Aluminum

17
RZ Series Feature String Nomenclature
GEN
MJREV
SIZE
SERIES
MNREV
VLT
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
1
2
3A
3B
3C
3D
3E
4A
4B
4C
5A
5B
5C
5D
5E
6A
6B
6C
6D
6E
7
8
9A
9B
9C
9D
RZ
A
-
145
-
D
0
-
3
-
C
A
B
0
A
-
0
0
0
0
0
:
N
0
-
A
A
K
A
Q
-
J
0
0
-
B
F
T
0
M
-
0
0
0
0
0
-
Q
F
-
A
0
A
A
-
0
0
-
M
0
-
C
-
0
0
0
-
8
0
-
D
A
0
B
-
0
0
-
0
0
0
-
A
B
E
Q
0
A
-
E
0
0
0
0
0
-
0
0
0
0
0
D
B
10A
10B
11A
11B
12
13A
13B
13C
14
15
16A
16B
16C
16D
17A
17B
18A
18B
18C
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
3D: SUPPLY FAN MOTOR TYPE
0 = High Efficiency Open Motor (1170 nominal rpm)
A = High Efficiency Open Motor (1760 nominal
rpm)
C = Permanent Magnet AC Open Motor (1170
nominal rpm)
D = Permanent Magnet AC Open Motor (1760
nominal rpm)
K = High Efficiency Totally Enclosed Motor (1170
nominal rpm)
L = High Efficiency Totally Enclosed Motor (1760
nominal rpm)
N = Permanent Magnet AC Totally Enclosed Motor
(1170 nominal rpm)
P = Permanent Magnet AC Totally Enclosed Motor
(1760 nominal rpm)
3E: SUPPLY FAN MOTOR SIZE
G = 3 hp
H = 5 hp
J = 7.5 hp
K = 10 hp
L = 15 hp
M = 20 hp
N = 25 hp
P = 30 hp
Q = 40 hp
R = 50 hp
Feature 4: RETURN/OUTSIDE AIR
OPTIONS
4A: OUTSIDE AIR SECTION
0 = 100% Outside Air
A = 100% Outside Air with Motorized Dampers
B = Manual Outside Air + Return Air Opening
C = Motorized Outside Air Dampers + Return Air
Opening
D = 100% Return Air
4A: OUTSIDE AIR SECTION Continued
E = Economizer
G = Econ + Power Exhaust (Plenum Fans)
J = Econ + Power Return (Plenum Fans)
Q = Econ + Energy Recovery + Bypass Damper
R = Econ + Energy Recovery + Bypass Damper +
Power Return (Plenum Fans)
4B: ENERGY RECOVERY TYPE
0 = No Energy Recovery
A = Polymer Energy Recovery Wheel
B = Polymer Energy Recovery Wheel + 1% Purge
C = Aluminum Energy Recovery Wheel
D = Aluminum Energy Recovery Wheel + 1% Purge
4C: ENERGY RECOVERY SIZE
0 = No Energy Recovery
A = Small Enthalpy
B = Medium Enthalpy
C = Large Enthalpy
D = Extra Large Enthalpy
E = Small Sensible
F = Medium Sensible
G = Large Sensible
H = Extra Large Sensible
J = Small Enthalpy + Exhaust Filters
K = Medium Enthalpy + Exhaust Filters
L = Large Enthalpy + Exhaust Filters
M = Extra Large Enthalpy + Exhaust Filters
N = Small Sensible + Exhaust Filters
P = Medium Sensible + Exhaust Filters
Q = Large Sensible + Exhaust Filters
R = Extra Large Sensible + Exhaust Filters
Feature 5: RETURN FAN OPTIONS
5A: RETURN FAN QUANTITY
0 = No Return Fan
A = 1 Fan
B = 2 Fans

18
RZ Series Feature String Nomenclature
GEN
MJREV
SIZE
SERIES
MNREV
VLT
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
1
2
3A
3B
3C
3D
3E
4A
4B
4C
5A
5B
5C
5D
5E
6A
6B
6C
6D
6E
7
8
9A
9B
9C
9D
RZ
A
-
145
-
D
0
-
3
-
C
A
B
0
A
-
0
0
0
0
0
:
N
0
-
A
A
K
A
Q
-
J
0
0
-
B
F
T
0
M
-
0
0
0
0
0
-
Q
F
-
A
0
A
A
-
0
0
-
M
0
-
C
-
0
0
0
-
8
0
-
D
A
0
B
-
0
0
-
0
0
0
-
A
B
E
Q
0
A
-
E
0
0
0
0
0
-
0
0
0
0
0
D
B
10A
10B
11A
11B
12
13A
13B
13C
14
15
16A
16B
16C
16D
17A
17B
18A
18B
18C
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
5B: RETURN FAN CONFIGURATION
0 = No Return Fan
A = No VFDs + Full Width Fan
B = 1 Fan per VFD + Full Width Fan
F = No VFDs + Narrow Width Fan
G = 1 Fan per VFD + Narrow Width Fan
L = Option A + Inlet Backdraft Dampers
M = Option B + Inlet Backdraft Dampers
R = Option F + Inlet Backdraft Dampers
S = Option G + Inlet Backdraft Dampers
5C: RETURN FAN SIZE
0 = No Return Fan
N = 27” Direct Drive Backward Curved Plenum
Aluminum
Q = 30” Direct Drive Backward Curved Plenum Steel
R = 33” Direct Drive Backward Curved Plenum Steel
S = 36.5” Direct Drive Backward Curved Plenum
Aluminum
T = 42.5” Direct Drive Backward Curved Plenum
Aluminum
5D: RETURN FAN MOTOR TYPE
0 = No Return Fan
A = High Efficiency Open Motor (1170 nominal
rpm)
B = High Efficiency Open Motor (1760 nominal
rpm)
D = Permanent Magnet AC Open Motor (1170
nominal rpm)
E = Permanent Magnet AC Open Motor (1760
nominal rpm)
L = High Efficiency Totally Enclosed Motor (1170
nominal rpm)
M = High Efficiency Totally Enclosed Motor (1760
nominal rpm)
P = Permanent Magnet AC Totally Enclosed Motor
(1170 nominal rpm)
Q = Permanent Magnet AC Totally Enclosed Motor
(1760 nominal rpm)
5E: RETURN MOTOR SIZE
0 = No Return Fan
H = 3 hp
J = 5 hp
K = 7.5 hp
L = 10 hp
M = 15 hp
N = 20 hp
P = 25 hp
Q = 30 hp
R = 40 hp
Feature 6: EXHAUST FAN OPTIONS
6A: EXHAUST FAN QUANTITY
0 = No Exhaust Fan
A = 1 Fan
B = 2 Fans
6B: EXHAUST FAN CONFIGURATION
0 = No Exhaust Fan
A = No VFDs + Full Width Fan
B = 1 Fan per VFD + Full Width Fan
F = No VFDs + Narrow Width Fan
G = 1 Fan per VFD + Narrow Width Fan
L = Option A + Inlet Backdraft Dampers
M = Option B + Inlet Backdraft Dampers
R = Option F + Inlet Backdraft Dampers
S = Option G + Inlet Backdraft Dampers
6C: EXHAUST FAN SIZE
0 = No Exhaust Fan
N = 27” Direct Drive Backward Curved Plenum
Aluminum
Q = 30” Direct Drive Backward Curved Plenum Steel
R = 33” Direct Drive Backward Curved Plenum Steel
S = 36.5” Direct Drive Backward Curved Plenum
Aluminum
T = 42.5” Direct Drive Backward Curved Plenum
Aluminum

19
RZ Series Feature String Nomenclature
GEN
MJREV
SIZE
SERIES
MNREV
VLT
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
1
2
3A
3B
3C
3D
3E
4A
4B
4C
5A
5B
5C
5D
5E
6A
6B
6C
6D
6E
7
8
9A
9B
9C
9D
RZ
A
-
145
-
D
0
-
3
-
C
A
B
0
A
-
0
0
0
0
0
:
N
0
-
A
A
K
A
Q
-
J
0
0
-
B
F
T
0
M
-
0
0
0
0
0
-
Q
F
-
A
0
A
A
-
0
0
-
M
0
-
C
-
0
0
0
-
8
0
-
D
A
0
B
-
0
0
-
0
0
0
-
A
B
E
Q
0
A
-
E
0
0
0
0
0
-
0
0
0
0
0
D
B
10A
10B
11A
11B
12
13A
13B
13C
14
15
16A
16B
16C
16D
17A
17B
18A
18B
18C
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
6D: EXHAUST FAN MOTOR TYPE
0 = No Exhaust Fan
A = High Efficiency Open Motor (1170 nominal
rpm)
B = High Efficiency Open Motor (1760 nominal
rpm)
D = Permanent Magnet AC Open Motor (1170
nominal rpm)
E = Permanent Magnet AC Open Motor (1760
nominal rpm)
L = High Efficiency Totally Enclosed Motor (1170
nominal rpm)
M = High Efficiency Totally Enclosed Motor (1760
nominal rpm)
P = Permanent Magnet AC Totally Enclosed Motor
(1170 nominal rpm)
Q = Permanent Magnet AC Totally Enclosed Motor
(1760 nominal rpm)
6E: EXHUAST MOTOR SIZE
0 = No Exhaust Fan
H = 3 hp
J = 5 hp
K = 7.5 hp
L = 10 hp
M = 15 hp
N = 20 hp
P = 25 hp
Q = 30 hp
R = 40 hp
7: O/A CONTROL
0 = Standard (No Actuator)
C = Fully Modulating Actuator - Sensible Limit
D = Fully Modulating Actuator - Enthalpy Limit
E = DDC Actuator
P = Option C + CO2 Override
Q = Option D + CO2 Override
R = Option E + CO2 Override
U = 2 Position Actuator
V = Fault Detection and Diagnostics Controller
(FDD) Sensible Limit
7: O/A CONTROL Continued
W = FDD Enthalpy Limit
Y = Option V + CO2 Override
Z = Option W + CO2 Override
8: RETURN & EXHAUST OPTIONS
0 = No Return Opening
A = Standard Return Opening without EA Dampers
B = Large Return Opening without EA Dampers
E = Standard Return Opening + Motorized EA
Dampers
F = Large Return Opening + Motorized EA Dampers
Feature 9: FILTER OPTIONS
9A: UNIT FILTER TYPE
0 = 2" Pleated MERV 8
A = 4" Pleated MERV 8
B = 2" Pleated MERV 8 + 4" Pleated MERV 11
C = 2" Pleated MERV 8 + 4" Pleated MERV 13
D = 2" Pleated MERV 8 + 4" Pleated MERV 14
E = 4" Pleated MERV 8 + 4" Pleated MERV 11
F = 4" Pleated MERV 8 + 4" Pleated MERV 13
G = 4" Pleated MERV 8 + 4" Pleated MERV 14
H = 2" Pleated MERV 8 + 12" Cartridge MERV 11
J = 2" Pleated MERV 8 + 12" Cartridge MERV 13
K = 2" Pleated MERV 8 + 12" Cartridge MERV 14
L = 4" Pleated MERV 8 + 12" Cartridge MERV 11
M = 4" Pleated MERV 8 + 12" Cartridge MERV 13
N = 4" Pleated MERV 8 + 12" Cartridge MERV 14
P = 2" Pleated MERV 8 + 30" Bag MERV 13
Q = 2" Pleated MERV 8 + 30" Bag MERV 14
R = 4" Pleated MERV 8 + 30" Bag MERV 13
S = 4" Pleated MERV 8 + 30" Bag MERV 14

20
RZ Series Feature String Nomenclature
GEN
MJREV
SIZE
SERIES
MNREV
VLT
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
1
2
3A
3B
3C
3D
3E
4A
4B
4C
5A
5B
5C
5D
5E
6A
6B
6C
6D
6E
7
8
9A
9B
9C
9D
RZ
A
-
145
-
D
0
-
3
-
C
A
B
0
A
-
0
0
0
0
0
:
N
0
-
A
A
K
A
Q
-
J
0
0
-
B
F
T
0
M
-
0
0
0
0
0
-
Q
F
-
A
0
A
A
-
0
0
-
M
0
-
C
-
0
0
0
-
8
0
-
D
A
0
B
-
0
0
-
0
0
0
-
A
B
E
Q
0
A
-
E
0
0
0
0
0
-
0
0
0
0
0
D
B
10A
10B
11A
11B
12
13A
13B
13C
14
15
16A
16B
16C
16D
17A
17B
18A
18B
18C
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
9B: UNIT FILTER BOX SIZE/LOCATION
0 = Standard Filters in Standard Position
A = Standard Filters in Pre-position
B = High Eff Filters Box A in Standard Position
C = High Eff Filters Box B in Standard Position
D = High Eff Filters Box C in Standard Position
E = High Eff Filters Box A in Pre-Position
F = High Eff Filters Box B in Pre-Position
G = High Eff Filters Box C in Pre-Position
9C: FINAL FILTER TYPE
0 = No Final Filters
A = 12" Cartridge MERV 13--Filter Box A
B = 12" Cartridge MERV 13--Filter Box B
C = 12" Cartridge MERV 13--Filter Box C
D = 12" Cartridge MERV 14--Filter Box A
E = 12" Cartridge MERV 14--Filter Box B
F = 12" Cartridge MERV 14--Filter Box C
G = 30" Bag MERV 13--Filter Box A
H = 30" Bag MERV 13--Filter Box B
J = 30" Bag MERV 13--Filter Box C
K = 30" Bag MERV 14--Filter Box A
L = 30" Bag MERV 14--Filter Box B
M = 30" Bag MERV 14--Filter Box C
U = 4" Pleated MERV 13--Filter Box A
V = 4" Pleated MERV 13--Filter Box B
W = 4" Pleated MERV 13--Filter Box C
Y = 4" Pleated MERV 14--Filter Box A
Z = 4" Pleated MERV 14--Filter Box B
1 = 4" Pleated MERV 14--Filter Box C
9D: FILTER OPTIONS
0 = None
A = Clogged Filter Switch - Unit Filters
B = Clogged Filter Switch - Unit + Energy Recovery
Filters
C = Clogged Filter Switch - Unit + Final Filters
D = Clogged Filter Switch - Unit + Energy Recovery
+ Final Filters
E = Magnehelic Gauge - Unit Filters
F = Magnehelic Gauge - Unit + Energy Recovery
Filters
9D: FILTER OPTIONS Continued
G = Magnehelic Gauge - Unit + Final Filters
H = Magnehelic Gauge - Unit + Energy Recovery +
Final Filters
J = CFS + Magnehelic Gauge - Unit Filters
K = CFS + Magnehelic Gauge - Unit + Energy
Recovery Filters
L = CFS + Magnehelic Gauge - Unit + Final Filters
M = CFS + Magnehelic Gauge - Unit + Energy
Recovery + Final Filters
Feature 10: REFRIGERATION CONTROL
10A: REFRIGERATION CONTROL
0 = None
E = Freeze Stats (each circuit)
10B: BLANK
0 = None
Feature 11: REFRIGERATION OPTIONS
11A: REFRIGERATION OPTIONS
0 = None
D = Hot Gas Bypass Non-Variable Compressor
Circuits (HGBNV)
M = HGBNV + Modulating Hot Gas Reheat
W = HGBNV + Polymer E-Coated Modulating Hot
Gas Reheat
11B: BLANK
0 = None
12: REFRIGERATION ACCESSORIES
0 = None
A = Sight Glass
B = Compressor Isolation Valves
C = Option A + B
Feature 13: POWER OPTIONS
13A: UNIT DISCONNECT TYPE
0 = Single Point Power - Standard Power Block
A = Single Point Power - Non-fused Disconnect
Power Switch