AAON RZ Series Rooftop Unit Manuals

Manuals and User Guides for AAON RZ Series Rooftop Unit. We have 3 AAON RZ Series Rooftop Unit manuals available for free PDF download: Installation Operation & Maintenance

AAON RZ Series Installation Operation & Maintenance (136 pages)

Packaged Rooftop Units & Outdoor Air Handling Units

Brand: AAON | Category: Air Handlers | Size: 7 MB

Table of Contents
3
Tables
6
Aaon® Rz Series Features and Options Introduction
8
Indoor Air Quality
8
Humidity Control
8
Safety
8
Installation and Maintenance
8
System Integration
8
Environmentally Friendly
8
What to Do if You Smell Gas
9
Unit Handling
11
Variable Frequency Drives
11
Water Pressure
12
Extended Life
12
Open Loop Applications
13
Model Options
17
Unit Orientation
19
Rz Series Feature String Nomenclature
21
Safety Options
26
Electrical Accessories
26
Cabinet Options
28
Warranty
30
General Information
31
Certification of Gas Heat Models
31
Certification of Steam or Hot Water Heat Models
31
Certification of Electric Heat Models
31
Certification of Cooling Models
31
Codes and Ordinances
32
Receiving Unit
32
Storage
34
Access Doors
34
Wiring Diagrams
34
Installation
34
Locating Units
34
Figure 1- Lockable Door Handles
34
Curb Installation
35
Table 1 - Air-Cooled Condenser Unit Clearances 45-240 Ton
35
Table 2 - Evaporative Condenser Unit Clearances 45-240 Ton
35
Figure 2 - RZ Series Unit Orientation
35
Lifting the Unit
36
Figure 3 - Base Rail Lifting Lug
36
Figure 4 - 4 Point Lift RZ Series Air-Cooled Condenser Unit
37
Lifting Slot Locations Are Unit Specific
38
Figure 5 - 8 Point Lift RZ Series Air-Cooled Condenser Unit
38
Duct Connection
39
Table 3 - Mounting Dimensions
39
Figure 6 - Curb Mounting
39
Figure 7 - Curb Detail
39
Figure 8 - Curb & Steel Mounting Rail with Dimensions
39
Reassembling Split Units
40
Figure 9 - Unit Base and Sides
40
Figure 10 - Unit Roof Flange Splice Detail
40
Figure 11 - Staggered Assembly for Refrigeration Pipes
41
Outside Air Rain Hood
42
End Flashing Installation
42
Figure 12 - Air Hood Shown in the Open Position
42
Vestibule Exhaust Fan
43
Motorized Exhaust & Rain Hood
43
Figure 13 - Factory Supplied End Flashings
43
Figure 14 - Vestibule Exhaust Fan
43
Figure 15 - Motorized Exhaust
43
Electrical
44
Table 4 - Nameplate Voltage Markings & Tolerances
44
Figure 16 - Power Block
45
Condensate Drain Piping
46
Table 5 - 35 KAIC Fuse Sizing
46
Table 6 - 35 KAIC Fuse Sizing
46
Draw-Through Coils
47
Table 7 - Draw-Through Drain Trap Dimensions (Metric)
47
Figure 17 - Draw-Through Drain Trap
47
Blow-Through Coils
48
Table 8 - Draw-Through Drain Trap Dimensions (Imperial)
48
Table 9 - Blow-Through Drain Trap Dimensions (Metric)
48
Figure 18 - Blow-Through Drain Trap
48
Startup (See Back of the Manual for Startup Form)
49
Filters
49
Table 10 - Blow-Through Drain Trap Dimensions (Imperial)
49
Figure 19 - Top Clip and Side Spring Fastener Securing Filters in Place
49
Airflow Balancing and Checking
50
Air Flow Monitoring
50
Supply, Return, and Exhaust Backward Curved Fans
50
Figure 20 - Air Volume Band
50
Table 11 - Plenum Fan Set Screw Specifications
51
Figure 21 - Air Volume Band Tab Locations
51
Figure 22 - Securing Air Volume Band Ends
51
Figure 23 - Plenum Fan Gap Tolerances
51
Back Draft Damper Setup
53
Adjusting Refrigerant Charge
53
Figure 24 - Closed Back Draft Damper
53
Figure 25 - Open Back Draft Damper
53
Table 12 - Acceptable Fin & Tube Sub-Cooling and Superheat Temperatures
55
Table 13 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub Cooling Values (Metric)
55
Freeze Stat Startup
56
Table 14 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-Cooling Values (Imperial)
56
Table 15 - Minimum Airflow and Room Areas
57
Table 16 - Minimum Airflow and Room Areas (Continued)
58
Table 17 - R-454B Refrigerant Temperature-Pressure Chart (Metric)
59
Refrigerant Filter Driers
60
Table 18 - R-454B Refrigerant Temperature-Pressure Chart (Imperial)
60
Table 19- Filter Drier Maximum Pressure Drop
60
Suction Filter Removal Instructions
61
Figure 26 - Replaceable Core Liquid Filter/Driers Suction Filter
61
Figure 27 - RPE-48-BD Filter Element
61
Low Sound Condenser Fan EC Motor Startup
62
Table 20 - EC Condenser Fan Cycling Options
62
Operation
63
Refrigerant Detection System
63
Packaged DX Cooling Operation
63
Direct Fire Unit with Return Air Gas Heater Operation
64
Direct Fire Unit Gas Heater Operation
64
Electric Heating Operation
65
Steam or Hot Water Preheating and Heating Operation
65
Chilled Water or Non-Compressorized DX Cooling Operation
65
Maintenance
66
Supply Fans
66
DX Cooling
66
Condensate Drain Pans
66
Filter Replacement
66
Air-Cooled Condenser
67
E-Coated Coil Cleaning
67
Microchannel Coil Cleaning
69
Refrigerant Removal and Evacuation
70
Options
71
Chilled Water Coil
72
Table 21 - Hot Water Coil Connection Sizes
72
Table 22 - Steam Distributing Coil Connection Sizes
72
Table 23 - Chilled Water Coil Connection Sizes
72
Table 24 - Min and Max Water Pressures and Temps
73
Packaged Direct Expansion (DX) Units
73
Compressor Cycling
73
Note: Multiple Units with Multiple Unit Controllers
74
Evaporative Condenser
75
Performance
76
Figure 28 - Proper Unit Location
76
Figure 29 - Improper Unit Locations
76
Temporary Drain-Evaporative Condenser
77
Condenser Tube Inspection
77
Pre Start-Up
77
Cleanliness
77
Freeze Protection
77
Recirculating Water System
77
Figure 30 - Temporary Drain Components
77
Pump Operation
78
Running
78
Condenser Fan Motors
78
Water Makeup Valve
78
Water Treatment System
79
Figure 31 - Water Makeup Valve
79
Figure 32 - Evaporative Cooled Condenser
80
Storage
81
Pump Maintenance
81
Fan Motor Maintenance
81
Access Doors
81
Bearings - Lubrication
82
Recommended Monthly Inspection
82
Mist Eliminators
82
Figure 33 - Evaporative Condenser Access Door
82
Air Inlet
83
Stainless Steel Base Pan
83
Propeller Fans and Motors
83
Recommended Annual Inspection
83
Cleaning
83
Warranties
83
Energy Recovery Units
85
Airflow Balancing and Checking
85
Controls
85
Wheel Set Purge Angle
86
Figure 34 - Polymer Energy Recovery Wheel
86
Wheel Check Purge Seal
87
Wheel Air Seal Adjustments
87
Wheel to Air Seal Clearance
88
Wheel Installation
88
Wheel Accessibility
88
Wheel Orientation & Support
88
Wheel Startup Procedure
89
Wheel Routine Maintenance and Handling
89
Wheel Drive Components
90
Wheel Air Seals
90
Wheel Service
90
Figure 35 - Polymer Wheel Segment Removal Pattern
91
Wheel Drive Motor and Pulley Replacement
92
Wheel Belt Replacement
92
Table 25 - Energy Recovery Wheel Cleaning Frequency
93
Aluminum Wheel Cleaning
94
Polymer Wheel Cleaning
94
Gas or Electric Heating
95
Figure 36 - Defrost Timer
95
Figure 37- Temperature Dial
95
Table 26 - RZ 45-140 Ton Electric Heating Capacities
96
Table 28 - RZ 45-140 Ton Gas Heating Capacities
96
Table 29 - RZ 145-240 Ton Gas Heating Capacities
96
Table 27- RZ 145-240 Ton Electric Heating Capacities
96
Gas Heating
97
For Your Safety
97
Table 30- Min and Max Gas Pressures (Metric)
97
Table 31- Min and Max Gas Pressures (Imperial)
97
Table 32 - RZ 45-140 Ton Unit Gas Piping Connections
97
Table 33 - RZ 145-240 Ton Unit Gas Piping Connections
98
Table 34 - (Metric) Natural Gas Maximum Piping Capacities (M 3 /Hr)
98
Table 35 - (Imperial) Natural Gas Maximum Piping Capacities (Ft 3 /Hr)
98
Table 36 - (Metric) Propane (Kw) Maximum Piping Capacities
98
Table 37 - (Imperial) Propane (Kbtu/Hr) Maximum Piping Capacities
99
Table 38 - Piping Support Intervals (Metric)
100
Table 39 - Piping Support Intervals (Imperial)
100
Figure 38 - Gas Heater Rain Hood
102
Figure 39 - Gas Heater Rain Hood Screws
102
Direct Fired Gas Heating
105
Figure 40- Gas Heat Exchanger
105
Table 40- Maximum Temperature Rise Setpoint for Return Air Units
106
Figure 41- Typical Factory Mutual (FM) Gas Piping Schematic for a Direct Fired Heater
106
Figure 42 - Removing Piping Scale with Pin Vise
109
Phase and Brownout Protection Module
110
DPM Setup Procedure
110
Average Voltage Screen
111
Fault Words
111
UV Lights
112
Table 41- Air Disinfection UV Information
112
Filter Replacement
113
Table 42 - RZ Series Filter Sizes
114
Table 43 - Metal Mesh and HEPA Filter Sizes
115
Replacement Parts
116
AAON Warranty, Service and Parts Department
116
Decommissioning
116
Appendixa - Heat Exchanger Corrosion Resistance
119
Corrosion Resistance of Copper and Stainless Steel in Brazed Plate Heat Exchangers
119
Appendixb - Thermistor Temperature Vs . Resistance Values
121
Rz Series Startup Form
122
Maintenance Log (E-Coated Coil)
129
Literature Change History
130
September 2020
130
January 2022
130
February 2022
130
January 2023
130
Aaon
136

AAON RZ Series Installation Operation & Maintenance (96 pages)

Packaged Rooftop Units & Outdoor Air Handling Units

Brand: AAON | Category: Air Handlers | Size: 4 MB

Table of Contents
3
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
- Table 1 - Electric Heating Capacities
  28
- Wiring Diagrams
  29
- Condensate Drain Pan
  29
Installation
29
Startup
55
Operation
68
Maintenance
70
- Gas Heating
  70
- Gas Heat Exchanger Removal
  71
- DX Cooling
  71
- Condensate Drain Pans
  71
- Figure 34 - Gas Heat Exchanger
  71
- Supply Fans
  72
  - Lubrication
    72
- Filter Replacement
  72
- Energy Recovery Wheel
  72
- Figure 35 - Wheel Segment Removal Pattern
  74
- 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
- Table 26 - RZ Series Filter Sizes
  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
  96

AAON RZ Series Installation Operation & Maintenance (112 pages)

Packaged Rooftop Units & Outdoor Air Handling Units

Brand: AAON | Category: Air Handlers | Size: 5 MB

Table of Contents
3
AAON® RZ Series Features and Options Introduction
7
Safety
8
RZ Series Feature String Nomenclature
14
General Information
26
Codes and Ordinances
27
Receiving Unit
27
Storage
28
Access Doors
28
Wiring Diagrams
28
Installation
28
Locating Units
28
Figure 1 - Lockable Door Handles
28
Curb Installation
29
Table 1 - Air-Cooled Condenser Unit Clearances 45-240 Ton
29
Table 2 - Evaporative Condenser Unit Clearances 45-240 Ton
29
Figure 2 - RZ Series Unit Orientation
29
Lifting the Unit
30
Figure 3 - Base Rail Lifting Lug
30
Figure 4 - 4 Point Lift RZ Series Air-Cooled Condenser Unit
31
Figure 5 - 8 Point Lift RZ Series Air-Cooled Condenser Unit
32
Duct Connection
33
Table 3 - Mounting Dimensions
33
Figure 6 - Curb Mounting
33
Figure 7 - Curb Detail
33
Figure 8 - Curb & Steel Mounting Rail with Dimensions
33
Reassembling Split Units
34
Figure 9 - Unit Base and Sides
34
Figure 10 - Unit Roof Flange Splice Detail
34
Refrigeration Split Installation Procedure
35
Figure 11 - Staggered Assembly for Refrigeration Pipes
35
Electrical Connection of Split Units
36
Outside Air Rain Hood
36
End Flashing Installation
36
Figure 12 - Air Hood Shown in the Open Position
36
Vestibule Exhaust Fan
37
Figure 13 - Factory Supplied End Flashings
37
Figure 14 - Vestibule Exhaust Fan
37
Figure 15 - Motorized Exhaust
37
Electrical
38
Table 4 - Nameplate Voltage Markings & Tolerances
38
Figure 16 - Power Block
39
Variable Speed Compressors
40
Table 5 - RZ Variable Speed Compressor VFD Frequency Range
40
Condensate Drain Piping
41
Draw-Through Coils
41
Figure 17 - Draw-Through Drain Trap
41
Table 6 - Draw-Through Drain Trap Dimensions
42
Table 7 - Blow-Through Drain Trap Dimensions
42
Figure 18 - Blow-Through Drain Trap
42
Startup
43
Filters
43
Cartridge Filter Installation
43
HEPA Filters
43
Metal Mesh Filters
43
Figure 19 - Top Clip and Side Spring Fastener Securing Filters in Place
43
Air Flow Monitoring
44
Supply, Return, and Exhaust Backward Curved Fans
44
Airflow Adjustment
44
Figure 20 - Air Volume Band
44
Table 8 - Plenum Fan Set Screw Specifications
45
Figure 21 - Air Volume Band Tab Locations
45
Figure 22 - Securing Air Volume Band Ends
45
Figure 23 - Plenum Fan Gap Tolerances
45
Back Draft Damper Setup
46
Adjusting Refrigerant Charge
46
Before Charging
46
Figure 24 - Closed Back Draft Damper
46
Figure 25 - Open Back Draft Damper
46
Checking Liquid Sub-Cooling
47
Checking Evaporator Superheat
47
Table 9 - Acceptable Fin & Tube Sub-Cooling and Superheat Temperatures
48
Table 10 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-Cooling Values
48
Adjusting Sub-Cooling and Superheat Temperatures
49
Freeze Stat Startup
50
Refrigerant Filter Driers
50
Table 11 - R-410A Refrigerant Temperature-Pressure Chart
50
Table 12 - Filter Drier Maximum Pressure Drop
50
Suction Filter Removal Instructions
51
Figure 26 - Replaceable Core Liquid Filter/Driers Suction Filter
51
Figure 27 - RPE-48-BD Filter Element
51
VFD Controlled Condenser Fan Startup
52
Table 13 - EC Condenser Fan Cycling Options
52
Table 14 - Hot Water Coil Connection Sizes
59
Table 15 - Steam Distributing Coil Connection Sizes
59
Table 16 - Chilled Water Coil Connection Sizes
60
Figure 28 - Proper Unit Location
63
Figure 29 - Improper Unit Locations
63
Figure 30 - Temporary Drain Components
64
Figure 31 - Water Makeup Valve
66
Figure 32 - Evaporative Condenser Access Door
68
Figure 33 - Aluminum Energy Recovery Wheel
71
Figure 34 - Aluminum ERW Purge Sector Location
72
Figure 35 - Polymer Energy Recovery Wheel
74
Figure 36 - Wheel Segment Removal Pattern
78
Table 17 - Energy Recovery Wheel Cleaning Frequency
81
Figure 37 - Defrost Timer
83
Figure 38 - Temperature Dial
83
Table 18 - RZ 45-140 Ton Electric Heating Capacities
84
Table 19 - RZ 145-240 Ton Electric Heating Capacities
84
Table 20 - RZ 45-140 Ton Gas Heating Capacities
84
Table 21 - RZ 145-240 Ton Gas Heating Capacities
84
Table 22 - RZ 45-140 Ton Unit Gas Piping Connections
85
Table 23 - RZ 145-240 Ton Unit Gas Piping Connections
85
Table 24 - Natural Gas Maximum Piping Capacities (Ft 3 /Hr)
85
Table 25 - Propane (Kbtu/Hr) Maximum Piping Capacities
86
Table 26 - Piping Support Intervals
87
Figure 39 - Gas Heater Rain Hood
89
Figure 40 - Gas Heater Rain Hood Screws
89
Gas Heat Exchanger Removal
91
Phase and Brownout Protection Module
92
Figure 41 - Gas Heat Exchanger
92
UV Lights
95
Filter Replacement
95
Table 27 - Air Disinfection UV Information
95
Table 28 - RZ Series Filter Sizes
96
Replacement Parts
97
Table 29 - Metal Mesh and HEPA Filter Sizes
97
Appendix A - Heat Exchanger Corrosion Resistance
98
Appendix B - Thermistor Temperature Vs. Resistance Values
100
RZ Series Startup Form
101
Maintenance Log (E-Coated Coil)
108
Literature Change History
109
G074290 · Rev. a · 220113
112

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