AAON RND Manuals

Manuals and User Guides for AAON RND. We have 1 AAON RND manual available for free PDF download: Installation Operation & Maintenance

AAON RND Installation Operation & Maintenance (136 pages)

Packaged Rooftop Units, Heat Pumps, & Outdoor Air Handling Units

Brand: AAON | Category: Air Handlers | Size: 12 MB

Table of Contents
3
AAON® RN Series Next Gen RN Features and Options Introduction
8
Safety
9
RN Series - Next Gen RN Feature String Nomenclature
15
General Information
29
Codes and Ordinances
29
Receiving Unit
30
Storage
30
Figure 1 - Lockable Handle
30
Wiring Diagrams
31
Installation
31
Locating Units
31
Table 1 - C Cabinet Unit Clearances
31
Figure 2 - RN Series C Cabinet
31
Setting the Curb
32
Table 2 - D Cabinet Unit Clearances
32
Table 3 - E Cabinet Unit Clearances
32
Figure 3 - RN Series D Cabinet
32
Figure 4 - RN Series E Cabinet
32
Figure 5 - RN Series 26, 31-50, 60, and 70 Ton Unit Isolator Locations
33
Figure 6 - Steel Mounting
34
Forklifting the Unit (11, 13 and 16-30 Ton)
35
Lifting the Unit
35
Figure 7 - Forklifting an RN Series C Cabinet, 11, 13 and 16-30 Tons
35
Figure 8 - Lifting Details of a 11-25 and 30 Ton Standard or Power Exhaust Unit
36
Figure 9 - Lifting Details of a 11-25 and 30 Ton Energy Recovery Wheel or Power Return Unit
36
Figure 10 - Lifting Details of a 26, 31-50, 60 and 70 Ton Unit
37
Figure 11 - Lifting Details of a 55, 65 and 75-140 Ton Unit
37
Duct Connection
38
Seismic Curb Installation
39
Figure 12 - Duct Connection
39
Figure 13 - Solid Bottom Seismic Curb with Filters
40
Outside Air Rain Hood
41
Figure 14 - Seismic Solid Bottom Curb Without Filters Cross Section
41
Figure 15 - Seismic Solid Bottom Curb Without Filters Detail a
41
Figure 16 - Seismic Solid Bottom Curb Without Filters Detail B
41
Figure 17 - Seismic Rigid Mount Curb
41
Figure 18 - 11, 13 and 16-30 Ton Closed Rain Hood
42
Figure 19 - 11, 13 and 16-30 Ton Open Rain Hood
42
Figure 20 - 26 and 31-70 Ton Open Rain Hood
42
End Flashing Installation
43
Metal Mesh Filters
43
Figure 21 - Factory Supplied End Flashings
43
Figure 22 - Rain Hood with Metal Mesh Filter Rack Installation
43
Electrical
44
Table 4 - Nameplate Voltage Markings & Tolerances
44
Table 5 - RN Series E Cabinet 55, 65, and 75-145 Ton Dual Point Power Methods
44
Figure 23 - Unit Utility Entry
45
Figure 24 - Back View of Power Switch from Compressor and Control Compartment
45
Figure 25 - Back View of Utility Entry and Power Switch from Control Compartment
46
Variable Speed Compressors
47
Table 6 - 35 KAIC Fuse Sizing
47
Table 7 - 65 KAIC Fuse Sizing
47
Table 8 - Variable Speed Compressor Turndown Ratio
47
Thermostat Control Wiring
48
Condensate Drain Piping
48
Table 9 - Control Wiring
48
Draw-Through Coils
49
Table 10 - Draw-Through Drain Trap Dimensions (Metric)
49
Figure 26 - Draw-Through Drain Trap
49
Startup
50
Filters
50
Air Flow Monitoring
50
Table 11 - Draw-Through Drain Trap Dimensions (Imperial)
50
Supply Fans
51
Table 12 - Plenum Fan Set Screw Specifications
52
Figure 27 - Supply Fan Banding
52
Power Return Axial Flow Fans (16-25 and 30 Tons)
53
Figure 28 - Plenum Fan Gap Tolerances
53
Figure 29 - Fan with the HUB on the Top and RET on the Bottom
53
Figure 30 - Bushing Mount Location
53
Power Return and Exhaust Axial Flow Fans (26 and 31-70 Tons)
54
Table 13 - Pin Location
54
Table 14 - Pin Groove Location
54
Figure 31 - RET with Pin in Groove 4
54
Figure 32 - Fan HUB and RET Castings
54
Figure 33 - Assembled Fan
55
Figure 34 - Back of the Fan
55
Figure 35 - Pin Groove Location
55
Figure 36 - Pitch Pin Location
55
Figure 37 - Example Pitch Pin
55
Adjusting Refrigerant Charge
56
Checking Liquid Sub-Cooling
56
Checking Evaporator Superheat
56
Table 15 - Acceptable Fin & Tube Air-Cooled Condenser Coil Refrigeration Circuit Values
57
Table 16 - Acceptable Fin & Tube Air-Cooled Condenser Coil Refrigeration Circuit Values
57
Table 17 - Acceptable Water-Cooled Refrigeration Circuit Values (Metric)
57
Table 18 - Acceptable Water-Cooled Refrigeration Circuit Values (Imperial)
57
Table 19 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-Cooling Values (Metric)
58
Table 20 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-Cooling Values (Imperial)
58
Adjusting Sub-Cooling and Superheat Temperatures
59
Freeze Stat Startup
59
Table 21 - R-410A Refrigerant Temperature-Pressure Chart (Metric)
60
Table 22 - R-410A Refrigerant Temperature-Pressure Chart (Imperial)
61
Table 23 - R-454B Refrigerant Temperature-Pressure Chart (Metric)
62
Table 24 - R-454B Refrigerant Temperature-Pressure Chart (Imperial)
63
Condenser Fan Electronically Commutated Motor (ECM) Startup
64
VFD Controlled Condenser Fan Startup
64
Table 25 - ECM Condenser Fan Cycling Options
64
Adjustable Fan Cycling Switch Procedure
65
Operation
67
Thermostat Operation
67
Packaged DX Cooling Operation and Control
67
Gas Heater Operation
67
Electric Heating Operation
68
Steam or Hot Water Preheating and Heating Operation
68
Modulating Electric Preheat
68
Chilled Water or Non-Compressorized DX Cooling Operation
68
Maintenance
68
Supply Fans
68
Power Exhaust Motor and Belt Removal
69
Figure 38 - 11-25 and 30 Ton Supply Fan
69
Figure 39 - Bolts Which Connect Motor Mount to Blower Fan
69
DX Cooling
70
Condensate Drain Pans
70
Brazed Plate Heat Exchanger Cleaning
70
E-Coated Coil Cleaning
71
Microchannel Coil Cleaning
72
Options
74
Heating Coils
74
Chilled Water Coil
75
Table 26 - Steam Coil Connection Sizes
75
Table 27 - Hot Water Coil Connection Sizes
75
Table 28 - Chilled Water Coil Connection Sizes
75
Table 29 - Min and Max Water Pressures and Temps
75
Packaged Direct Expansion (DX) Units
76
Variable Capacity Compressor Controller
77
Figure 40 - Variable Capacity Compressor Controller
77
Table 30 - Demand Signal Vs. Compressor Capacity Modulation
78
Figure 41 - Compressor Controller Flash Code Details
78
Evaporator Coil (11-25 and 30 Ton)
79
Condenser Fans (11-25 and 30 Ton)
79
Figure 42 - Evaporator Coil Access
79
Suction Filter (55, 65 and 75-140 Ton)
80
Figure 43 - Removal of a Condenser Fan Assembly
80
Figure 44 - RPE-48-BD Filter Element
80
Suction Filter Removal Instructions
81
Refrigerant-To-Water Heat Exchanger
81
Water-Source Heat Pump Applications
81
Open Loop Applications
81
Freezing Water in the Heat Exchanger
82
Water Piping
83
Table 31 - Glycol Freezing Points
83
Table 32 - Standard Brazed Plate Heat Exchanger Water Connections
84
Energy Recovery Units
85
Aluminum Energy Recovery Wheel
86
Figure 45 - Aluminum Energy Recovery Wheel
86
Figure 46 - Aluminum ERW Purge Sector Location
87
Polymer Energy Recovery Wheel
88
Figure 47 - Polymer Energy Recovery Wheel
89
Figure 48 - Wheel Segment Removal Pattern
93
Energy Recovery Wheel General Cleaning
95
Table 33 - Energy Recovery Wheel Cleaning Frequency
96
Energy Recovery Wheel Defrost Timer Setting
98
Figure 49 - Defrost Timer
98
Figure 50 - Temperature Dial
98
Gas or Electric Heating
99
Table 34 - Electric and Gas Heating Capacities
99
Electric Preheat
100
Status Display Screens
100
Figure 51 - Preheat Controller
100
System Setting Screens
101
Table 35 - Stages of Electric Preheat
101
LED Flash Alarm Codes
102
Operation
103
Gas Heating
103
Table 36 -11 - 70 Ton Gas Connections
104
Table 37 - Natural Gas (M 3 /Hr [Ft 3 /Hr]) Maximum Piping Capacities
104
Figure 52 - RN Series Gas Heat Exchanger
104
Piping Sizing Examples
105
Gas Pressure Regulator & Overpressure Protection Device
105
Table 38 - Propane (Kw [Kbtu/Hr]) Maximum Piping Capacities
105
Piping Supports
106
Additional Gas Piping Considerations
106
Table 39 - Gas Piping Supports (Metric)
106
Table 40 - Gas Piping Supports (Imperial)
106
Figure 53 - Example 11-50, 60 & 70 Ton through the Base Gas Piping
108
Figure 54 - Example 55, 65 and 75-140 Ton for Across the Roof Gas Piping
109
Leak Testing
110
Figure 55 - Gas Heater Instructions
111
Gas Heating Maintenance
112
Gas Heat Exchanger Removal
113
Figure 56 - Gas Heat Exchanger
113
Phase and Brownout Protection Module
114
Filter Replacement
116
Table 41 - RN Series C Horizontal 11, 13, 16-25 and 30 Ton Pre Filters
116
Table 42 - RN Series C Horizontal 11, 13, 16-25 and 30 Ton Unit Filters
116
Table 43 - RN Series C Horizontal 11, 13, 16-25 and 30 Ton Energy Recovery Wheel Filters
117
Table 44 - RN Series C Horizontal 11, 13, 16-25 and 30 Ton Final Filters
117
Table 45 - RN Series D Cabinet 26, 31, and 40 Ton Pre Filters
117
Table 46 - RN Series D Cabinet 50, 60, and 70 Ton Pre Filters
118
Table 47 - RN Series D Cabinet 26, 31, and 40 Ton Unit Filters
118
Table 48 - RN Series D Cabinet 50, 60, and 70 Ton Unit Filters
118
Table 49 - 55, 65, and 75 Ton Unit Filters
119
Table 50 - 90-140 Ton Unit Filters
119
Table 51 - RN Series D Cabinet 26, 31-50, 60, and 70 Ton Energy Recovery Wheel Filters
119
Table 52 - 55, 65, and 75-140 Ton Energy Recovery Wheel Filters
120
Replacement Parts
121
Appendix A - Heat Exchanger Corrosion Resistance
124
Appendix B - Thermistor Temperature Vs. Resistance Values
126
RNA Series Startup Form
127
Maintenance Log
131
Maintenance Log (E-Coated Coil)
132
Literature Change History
133
V03830 · Rev. a · 231215
136

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AAON RND Installation Operation & Maintenance (136 pages)

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