Friday, September 16, 2011

NORDIC DXS-Series Service Manual


Installation and Service Manual
NORDIC® DXS-Series
Two-Stage R410a
Model Sizes 25-65 (2-5 Ton)

Table of Contents
TABLES, DIAGRAMS & DRAWINGS
INSTALLATION INFORMATION
Unit description
Unpacking the unit
Optimum Placement
Electrical Provisions
Thermostat Requirements
Air Handler Connections
Safety Controls
Domestic Hot Water Connections
General Maintenance
DIRECT EXPANSION UNIT OPERATION
Refrigeration
Control Board
SIZING AND DUCTWORK
Heat Pump Sizing
Air Handler Selection and Sizing
Duct Systems - General
Duct Systems - Grill Layout
Thermostat Location
Plenum Heater (Optional)
Condensate Drain
Duct Sizing Guide
DIRECT EXPANSION LOOP CONNECTION AND CHARGING
Line Set Interconnect Tubing
Pipe Insulation
Silver Soldering Line Sets
Pressure Testing
Vacuuming the System
Charging the System
STARTUP PROCEDURE
Pre-start Inspection
Unit Startup
Startup Record
HEATING TXV ADJUSTMENT
Adjustment Procedure
Heating TXV Adjustment Record
TROUBLESHOOTING GUIDE
MODEL SPECIFIC INFORMATION
Standard Capacity Rating Tables
Electrical Tables
WARRANTY INFORMATION

Tables, Diagrams and Drawings
TABLES
Table 1 - Control Signal Description
Table 2 - Air Handler Control Signals
Table 3 - Cooling Mode Loop Sequences
Table 4 - Cooling Loop Configuration
Table 5 - RS232 Port Configuration
Table 6 - Control Board Commands
Table 7 - Control Board Default Settings
Table 8 - Heat Pump Size vs. Heated Area
Table 9 - Air Flow and Air Coil Volume
Table 10 - Heat Pump Size vs. Hot Air Grills
Table 11 - Plenum Heater Sizing
Table 12 - Duct Sizing Guide
Table 13 - DX Charge Chart
Table 14 - Heating TXV Adjustment Record Column Descriptions
Table 15 - Standard Capacity Ratings - Heating 60Hz
Table 16 - Standard Capacity Ratings - Cooling 60Hz
Table 17 - Heat Pump Electrical Information (230-1-60)

DRAWINGS
000469PDG - Single Unit Connection to DHW Tank
000484PDG - Single Unit Connection to DHW Pre-Heat Tank
000310CDG - NCB Laptop Communication Cable
000644CDG - Typical DXS Split System Duct and Condensate Connections
000769PDG - DX Line Set Interconnect Tubing Installation (R410a)
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