Stulz SCS-018, Installation, Operation And Maintenance Manual

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Table of Contents
1.0 Introduction ..................................................... 1
1.1 General ..............................................................................1
1.2 Product Description .....................................................1
1.3 Safety ................................................................................1
1.3.1 General ..............................................................................1
1.3.2 Safety Summary .............................................................1
1.4 General Design...............................................................3
1.4.1 Electric Box Access ......................................................3
1.4.2 Circuit Breakers / Motor Start Protectors ............3
1.4.3 Heaters (Optional) .........................................................3
1.4.4 Coil ......................................................................................4
1.4.5 EC Fan ...............................................................................4
1.4.6 Temperature/Humidity Sensor .................................4
1.4.7 Controller ..........................................................................4
1.5 Optional Equipment ......................................................4
1.5.1 Humidifi er (Optional) ....................................................4
1.5.2 Condensate Pump ........................................................4
1.5.3 Smoke Detector ............................................................4
1.5.4 Firestat .............................................................................4
2.0 Installation ....................................................... 5
2.1 Receiving the Equipment ............................................5
2.2 Site Preparation .............................................................5
2.3 Rigging ..............................................................................6
2.4 Mounting/Placement ...................................................6
2.4.1 Outdoor Equipment ......................................................7
2.5 Optional Equipment (Field Installed) .......................7
2.5.1 Floor Stand ......................................................................7
2.5.2 Plenum Box Assembly .................................................7
2.5.3 Remote Display ..............................................................7
2.5.4 Condensate Pump ........................................................8
2.5.5 Remote Temperature/Humidity Sensor ................8
2.5.6 Remote Water Detector ..............................................8
2.6 Air Distribution Connection ........................................8
2.6.1 Downfl ow Confi guration Air Patterns
(CCD/CCF) .......................................................................8
2.6.2 Upfl ow Confi guration Air Patterns
(CCU/CCR) ......................................................................8
2.7 Piping Connections ......................................................9
2.7.1 Refrigerant .......................................................................9
2.7.1.1 Self-Contained Systems .............................................9
2.7.1.2 Split Systems ..................................................................9
2.7.2 Water/Glycol, Chilled Water and Hot Water
Reheat Piping .............................................................. 12
2.7.3 Pump Package ............................................................ 12
2.7.4 Condensate Drain Line ............................................. 12
2.7.4.1 Gravity Drain ................................................................. 12
2.7.4.2 Condensate Pump ..................................................... 12
2.7.5 Humidifi er ..................................................................... 12
2.8 Utility Connections ..................................................... 13
2.8.1 Main Power ................................................................... 13
2.8.1.1 Single-Phase Units 208/230V ............................ 14
2.8.1.2 Three-Phase Units ..................................................... 14
2.8.2 Controls ......................................................................... 14
2.8.3 Optional Equipment ................................................... 14
2.8.3.1 Condensate Pump ..................................................... 14
2.8.3.2 Remote Temperature/Humidity Sensor ............. 14
2.8.3.3 Remote Water Detector ........................................... 15
2.8.4 Split Systems ............................................................... 15
2.8.4.1 Glycol Systems ............................................................ 15
2.8.4.2 Remote Condenser.................................................... 15
2.9 System Charging Procedures ................................ 15
2.9.1 Water-Water/Glycol Cooled Systems ...................15
2.9.2 Pump .............................................................................. 15
2.9.3 Remote Air-Cooled Systems .................................. 15
2.9.4 Estimating Refrigerant Charge .............................. 17
2.9.4.1 Preparing the System For Charging ..................... 17
2.9.4.2 Evacuate the System ................................................. 17
2.9.4.3 Refrigerant Charging Procedure ............................. 18
2.9.4.4 -30 °F Ambient Applications .................................. 19
2.10 System Settings and Adjustments ....................... 19
2.10.1 Low/High Pressure Limit Switch ......................... 19
2.10.2 Head Pressure Controls-Air Cooled Systems .. 20
2.10.2.1 -20°F Condenser Fan Speed ................................ 20
2.10.2.2 -30°F Flooded Head Pressure Control .............. 20
2.10.3 Head Pressure Controls-Water/Glycol
Cooled Systems .......................................................... 20
2.10.4 Humidifi er Adjustment .............................................. 20
2.10.5 Thermal Expansion Valve ......................................... 20
2.10.6 Hot Gas Reheat (Optional)....................................... 21
2.10.7 Snap Acting Hot Gas Bypass (Optional) ............. 21
2.11 Refrigerant Characteristics ..................................... 21