SRL Service Manual
Revision 00
July 2007
Page 1 of 56
Table of Contents
1. General Description 4
2. Specifications 5
2.1 Model Range 5
2.1.1 60 Hz Models 5
2.1.2 50 Hz Models 6
2.2 Operating Limits 6
2.3 Technical Specifications 7
2.3.1 60 Hz Air Cooled Models 7
2.3.2 60 Hz Water Cooled Models 8
2.3.3 50 Hz Air Cooled Models 9
2.3.4 50 Hz Water Cooled Models 10
2.4 Weight & Dimensions 11
2.4.1 60 Hz Models 11
2.4.2 50 Hz Models 12
3. System Design 13
3.1 The Air Circuit 14
3.1.1 Air-To-Air Heat Exchanger 15
3.1.2 Air-To-Refrigerant Heat Exchanger 15
3.1.3 Demister Separator 15
3.1.4 Condensate Chamber 15
3.1.5 Dew Point Temperature Sensor 16
3.1.6 Condensate Level Sensor 16
3.2 Refrigeration Circuit 16
3.2.1 The Thermal Mass Concept 17
3.2.2 Compressor 17
3.2.3 Condenser 18
3.2.4 Refrigerant Filter 18
3.2.5 Expansion Device 19
3.2.6 Refrigerant 19
3.2.7 High Pressure Switch 19
3.2.8 Low Pressure Switch 19
3.2.9 Fan Pressure Switch (Air Cooled Units) 20
3.2.10 Water Regulating Valve (Water Cooled Units) 20
3.2.11 Hot Gas Bypass Valve 20
3.2.12 Liquid Accumulator 21
(Continued on following page…)
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