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Site Preparation and Installation
2.4.1 Close Coupled Installations
If the evaporator and condensing units are to be mounted side-to-side (close coupled), hang each unit
evaporator prior to suspending the units. Route power wire flex conduit into condensing unit as units are suspended. Refer to instructions supplied with kit for details. Align bolt holes in the condensing unit and in the evaporator. Insert rubber spacers and secure four (4) sets of hardware provided. Align the refriger-
ant connections and tighten them as described in 2.4.3 - Piping Connections and Coolant Require-
ments. Remove “P” clamps from piping to aid fitting alignment.
Figure 5 Close coupled installation
Condensing
Unit
Evaporator
Cage nut
Isolator rubber
5/16" lock washer
5/16" capscrew
5/16" flat washer
NOTE: Disconnect P-clamps on lines in the evaporator for easy close coupling.
P-clamps are for shipping purposes only.
9
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Table of contents
- 9 DX Evaporator Section
- 9 Chilled-Water Model
- 9 Air-Cooled Condensing Unit (Indoor Centrifugal)
- 9 Air-Cooled Condensing Unit (Outdoor Prop Fan)
- 9 Water/Glycol Condensing Unit (Indoor)
- 14 Figure 1 System configurations-air cooled systems
- 14 Figure 2 System Configurations-water/glycol systems
- 15 Figure 3 System Configurations-chilled water systems
- 17 Figure 5 Close coupled installation
- 18 Filter Box
- 18 Connections for Ducted Systems
- 18 Table 5 Evaporator external static pressure (60) at 3750 CFM (6371 CMH)
- 19 Drain Line
- 19 Figure 6 Drain installation
- 20 Condensate Pump
- 20 Figure 7 Condensate pump installation
- 20 Humidifier Water Supply Line
- 21 Chilled-Water Piping-Chilled-water Systems Only
- 21 Figure 8 General arrangement diagram - chilled-water systems
- 22 Refrigerant (R-22) Piping
- 22 Table 6 Recommended refrigerant line sizes
- 22 Figure 9 Refrigerant piping diagram
- 23 Total refrigerant = Units and Lines
- 23 Table 7 8-ton unit refrigerant charge
- 23 Table 8 Line charges (field piping)*
- 23 Quick Connect Fittings
- 23 Table 9 Refrigerant quick connect sizes and torque
- 24 Figure 10 Evaporator or chilled-water unit dimensional data
- 25 Power Connections
- 25 Control Connections (10-wire on air-cooled, 8-wire on water/glycol cooled)
- 26 Figure 11 Evaporator unit electrical connections
- 27 General Considerations
- 27 Considerations for Specific Applications
- 28 Figure 12 Piping connections - indoor air-cooled centrifugal fan condensing unit
- 28 Power Connections
- 28 Control Connections
- 29 Figure 13 Indoor air-cooled centrifugal condensing unit dimensions and pipe connections
- 30 Figure 14 Indoor air-cooled centrifugal condenser electrical connections
- 31 Power Connections
- 31 Control Connections
- 32 Figure 15 Electrical field connections - outdoor condensing unit
- 33 Figure 16 Footprint dimensions - outdoor condensing unit
- 34 Figure 17 Piping and electrical connections - outdoor condensing unit
- 35 Water/Glycol Piping Considerations
- 35 Condensing Unit Fluid Requirements
- 35 Regulating Valve
- 35 Control Connections
- 36 Figure 18 Indoor water/glycol condensing unit dimensional data
- 37 Figure 19 Indoor water/glycol condensing unit electrical field connections
- 38 Figure 20 System piping with indoor water/glycol-cooled condensing unit
- 39 Figure 21 Optional free cooling coil (3-way valve) on water/glycol units
- 40 Figure 22 Optional free cooling coil (3-way valve) on air-cooled units
- 47 Table 12 Setup functions, default values and allowable ranges
- 49 Table 14 Equipment switch settings (unit control board)
- 49 Table 15 Switch settings (wallbox board)
- 51 Figure 24 Control menu
- 52 Figure 25 Control board (inside evaporator)
- 52 Figure 26 Wall box board
- 54 System Activation
- 55 Air-Cooled Systems
- 55 Water/Glycol Systems
- 59 Air Distribution
- 59 Blower Removal (Evaporator)
- 60 Suction Pressure
- 60 Discharge Pressure
- 60 Table 16 Typical discharge pressures
- 60 Thermostatic Expansion Valve
- 60 Air-Cooled Condensing Units
- 60 Coaxial Condensers (Water/Glycol-Cooled Condensing Units)
- 61 Regulating Valves (Water/Glycol Condensing Units)
- 61 Glycol Solution Maintenance
- 61 Hot Gas Bypass (Optional)
- 62 Replacement Procedures
- 64 Replacing the Humidifier Canister
- 64 Table 17 Humidifier control board DIP switch settings