AAON LZ Series Manuals

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

AAON LZ Series Installation Operation & Maintenance (104 pages)

Chillers and Outdoor Mechanical Rooms

Brand: AAON | Category: Chiller | Size: 4 MB

Table of Contents
3
Codes and Ordinances
19
Receiving Unit
19
Storage
20
Outdoor Mechanical Room
20
Wiring Diagrams
21
General Maintenance
21
Chiller Primary Pumping
21
Chiller Primary/Secondary Pumping
22
Condensing Boilers
22
Makeup Water
23
Compression Tank
23
Figure 1 - Backflow Preventer
23
Pressure Relief Valve
24
Automatic Air Vent
24
Dual Pumps
24
Pressure Gauges and Thermometers
24
Figure 2 - Pressure Relief Valve
24
Table 1 - Service Clearances
25
Pipe Insulation
25
Outdoor Mechanical Room Placement
25
Curb and Steel Mount Installation
25
Figure 3 - Curb Mounting with Dimensions
26
Figure 4 - Curb End Detail
26
Figure 5 - Steel Mounting Rail with Dimensions
26
Figure 6 - Concrete Pad Mounting with Dimensions
27
Figure 7 - LZ Base
27
Lifting and Handling
28
Figure 8 - Lifting Points
28
Vestibule Exhaust Fan
29
Figure 9 - LZ Series Example Lifting Detail
29
Figure 10 - Vestibule Exhaust Fan
29
Water Connection
30
Figure 11 - Water Pipe Flashing Installation
30
Temporary Drain - Evaporative Condenser
31
Access Doors
31
End Flashing Installation
31
Figure 12 - Temporary Drain Components
31
Figure 13 - Factory Supplied End Flashings
31
Boiler Gas Connection
32
Boiler Air Intake / Vent Piping
32
Table 2 - Unit Gas Pipe Information, Feature B4 = A-J
33
Table 3 - Unit Gas Pipe Information, Feature B4 = K-N
34
Sidewall Direct Boiler Venting
35
Figure 14 - Sidewall Vent Shipping Cover Removal
35
Figure 15 - Sidewall Vent Plate Installation
35
Figure 16 - Typical Air Intake Piping
35
Figure 17 - Typical Flue Vent Piping
36
Vertical Direct Boiler Venting
37
Figure 18 - Sidewall Vent Base
37
Figure 19 - Sidewall Vent Cap
37
Figure 20 - Roof Air Intake and Vent Piping Shipping Covers
37
Figure 21 - Typical Vertical Air Intake Piping
38
Figure 22 - Correct Joint Connection
39
Figure 23 - Incorrect Joint Connection
39
Figure 24 - Typical Vertical Vent Piping
40
Figure 25 - Vertical Termination of Air Intake and Vent Piping
40
Boiler Condensate Drain
41
Split Unit Assembly
41
Unit Mounting Isolation
41
Low Ambient Operation
41
Table 4 - Nameplate Voltage Markings
42
Electrical
42
Table 5- Tandem Circuited Variable Speed Compressor VFD Frequency Range
44
Variable Speed Compressors
44
Figure 26 - Evaporative-Condensed Chiller Section Layout
45
Table 6 - Air-Cooled Condenser Fan Pitch
47
Table 7 - Evaporative-Condensed Chiller Fan Pitch
47
Condenser Fan Pitch Adjustment
47
Figure 27 - Fan with the HUB on the Top and RET on the Bottom
48
Figure 28 - Bushing Mount Location
48
Figure 29 - RET with Pin in Groove 4
48
Figure 30 - Fan HUB and RET Castings
48
Table 8 - Condenser Fan Pin Location (Bushing Mount)
49
Figure 31 - Pitch Insert
49
Table 9 - Condenser Fan Pin Location (Rotation Direction)
49
Table 10 - Fan Assembly Bushing Torque Specifications
50
Boiler System Startup
50
Boiler Sequence of Operations
51
General
51
Refrigerant Suction Line Filter
51
Figure 32 - Replaceable Core Filter Driers
52
Table 11 - Filter Drier Maximum Pressure Drop
52
Suction Filter Removal Instructions
52
Refrigerant Liquid Line Filter Driers
52
Evaporator/Heat Exchangers
53
Adjusting Refrigerant Charge
53
Table 12 - Acceptable Refrigeration Circuit Values
54
Table 13 - R-134A Refrigerant Temperature-Pressure Chart
55
Table 14 - R-410A Refrigerant Temperature-Pressure Chart
56
Air-Cooled Condenser
57
E-Coated Coil Cleaning
57
Lubrication
57
Microchannel Coil Cleaning
59
Evaporative-Condensed Chiller
61
- Severe Operating Conditions Service
  62
- Safety
  62
- Performance
  62
- Figure 33 - Proper Unit Location
  62
- Figure 34 - Improper Unit Locations
  62
- Warranties
  63
- Condenser Tube Inspection
  63
- Freeze Protection
  63
- Recirculating Water System
  63
- Startup
  63
- Cleanliness
  63
- Storage
  63
- Pump Operation
  64
- Running
  64
- Condenser Fan Motors
  64
- Water Make up Valve
  64
- Water Treatment System
  65
- Sequence of Operation for LZ Series Units Without Diagnostics
  65
- Figure 35 - Water Makeup Valve
  65
- Sequence of Operation for LZ Series Units with Diagnostics
  66
- Pump Maintenance
  67
- Fan Motor Maintenance
  67
- Access Doors
  67
- Figure 36 - Evaporative Condenser Access Door
  67
- Bearings - Lubrication
  68
- Recommended Monthly Inspection
  68
- Mist Eliminators
  68
- Air Inlet
  68
- Stainless Steel Base Pan
  68
- Propeller Fans and Motors
  68
- Recommended Annual Inspection
  68
- Cleaning
  68
- Water Quality
  69
- Table 15 - Recirculating Water Quality Guidelines
  69
- Mechanical Cleaning
  70
Service
70
Replacement Parts
70
Water Pressure Reducing Valve
71
Water Pressure Relief Valve
73
Automatic Air Vent Valves
73
Pumps - Installation and Operating Instructions
75
Pump Piping - General
77
Pump Operation
77
General Care
78
Dual Pump Specific Information
80
Horizontal and Vertical Expansion Tanks
85
Suction Guides
86
- Glycol Auto Fill Unit
  87
- Flo-Trex Combination Valve
  89

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AAON LZ Series Installation Operation & Maintenance (104 pages)

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