York YMAE - Page 82

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Figure 60: Four-pipe cooling operation envelope

Figure 61: Four-pipe heating operation envelope

YMAE Air-Cooled Inverter Scroll Chiller and Heat Pump82

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Table of Contents3
General Safety Guidelines7
Safety Symbols7
Changeability of this Document8
Wiring Warning8
Refrigerant Warning8
Conditioned Based Maintenance9
Nomenclature9
General Chiller Information and Safety10
About this Guide10
Introduction10
Warranty10
Handling11
Safety Standards11
Fluorinated Greenhouse Gases11
Responsibility for Safety12
Misuse of Equipment12
Suitability for Application12
Structural Support12
Mechanical Strength12
General Access12
Pressure Systems12
Electrical12
Heat Radiation12
Rotating Parts13
Sharp Edges13
Refrigerants and Oils13
High Temperature and Pressure Cleaning13
Emergency Shutdown13
MSDS Information13
Generator Operation14
Safety Labels15
YMAE Units with R-454B Refrigerant16
Product Description17
Introduction17
General System Description17
Compressors17
Refrigerant Circuits17
Heat Exchanger18
Ambient Coils18
SPC, Control Panel, and HMI19
SC-Equip (SC-EQ)19
Canadian Registration Number (CRN) Application19
Accessories and Options20
Low Sound Kit20
Neoprene Pads Isolators20
In. Spring Isolators20
Flow Switch for Special Temperature Difference20
Water Temperature Sensor in a Modular Array20
Hydro Kit20
Enclosure Panels21
Air-To-Water Heat Pump Unit Modes of Operation21
Two-Pipe Cooling Mode21
Two-Pipe Heating Mode22
Four-Pipe Cooling Mode23
Four-Pipe Heating Mode23
Defrost Mode25
Four-Pipe Simultaneous Cooling and Heat Recovery26
Component Location Diagrams27
R-454B Components34
Rigging, Handling, and Storage35
Lifting Weights36
Delivery and Storage40
Inspecting the Delivery40
Moving the Unit41
Removing the Unit from the Shipping Container41
Lifting the Unit43
Moving the Unit by Crane45
Installation46
Location and Clearance46
Outdoor Installations46
Noise Sensitive Locations46
Corrosion Locations47
Operating in Low Ambient Conditions47
Location Clearances47
Installation of Vibration Isolators54
Pipework Arrangement54
Connection Types and Sizes54
Installing the Neoprene Isolators55
Installing the 1 In. Deflection Spring Isolators56
Installing the 2 In. Deflection Spring Isolators57
R-454B Pipework58
Water Treatment58
Electrical Connection60
Power Wiring60
Control Wiring61
Modular Communications63
Commissioning72
Preparing with the Power off72
Preparing with the Power on73
First Time Start-Up74
Special Items Required for Vacuuming and Refrigerant Charging74
Vacuuming Procedure75
Confirming a Vacuum76
Water Evaporation76
Refrigerant Charging for R-454B77
Confirming the Correct Refrigerant Tank77
Charging the Refrigerant77
Technical Data79
Heat Exchanger Flow79
Operational Limitations80
Operating and Storage Conditions81
Physical Data84
Electrical Data87
Refrigerant and Oil Charge88
Water Requirements89
Sound Data89
Dimensions90
Unit Operation100
General100
Control System100
Unit Operating Sequence100
Human Machine Interface (HMI)102
Main Interface103
System104
Unit105
Fault107
Hmi108
Changing the System Setpoints108
Changing the Access Level108
Starting or Stopping the Chiller108
Setting the Date and Time109
Setting a Schedule109
Setting a Holiday109
Setting the Water Temperature Control Using Return (RT) or Leaving (LT)109
Setting the Cooling and Heating Setpoints109
Setting the Low Temperature Leaving Alarm110
Maintenance111
General Requirements111
Daily Maintenance111
Pressure Relief Valves112
Overall Unit Inspection112
Heat Exchanger In-Service Inspection112
Maintenance Alerts112
Scheduled Maintanence113
Service and Troubleshooting114
Decommissioning, Dismantling, and Disposal118
General118

York YMAE - Page 82

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