171.800.627.4499
DN-Series Indoor DOAS
7.0 MAINTENANCE 57
7.1 SCHEDULE ...........................................................57
7.1.1 General Cleaning and Inspection (Quarterly) .......................57
7.1.2 Filters (Quarterly) ..............................................................58
7.1.3 Filter Pressure Drop Tables ................................................ 58
7.1.4 Cabinet Maintenance (Annual) ...........................................58
7.1.5 Electric Motor Maintenance (Annual) ..................................59
7.1.6 VFDs (optional) .................................................................. 59
7.1.7 Enthalpic Core Maintenance (Annual) ................................. 59
7.1.8 Coil Maintenance (Annual) .................................................60
7.1.9 Condensate Drain Maintenance (Annual) ............................ 61
7.1.10 Damper Maintenance (Annual) .........................................61
7.1.11 Fan Maintenance (Annual) ................................................ 61
7.1.12 Gas Heat Module Maintenance (Annual) ............................61
7.1.13 Electric Heat Module Maintenance (Annual) ......................61
7.1.14 Current Switch Adjustment ...............................................62
7.1.15 Door Latch Adjustment .....................................................62
7.1.16 Fan/Motor Removal ..........................................................62
7.1.17 Coil Removal ....................................................................64
7.1.18 Water Treatment ..............................................................64
7.1.19 Winterization ...................................................................64
7.2 MAINTENANCE RECORDS .....................................65
7.3 SERVICE PARTS .................................................... 66
8.0 TROUBLESHOOTING 67
9.0 FACTORY ASSISTANCE 67
TABLE OF CONTENTS
TABLE OF ILLUSTRATIONS
TABLE OF WIRING SCHEMATICS
Figure 1.2.0 DN DOAS Modules .................................................. 23
Figure 1.2.1 DN DOAS with Alternate SA Fan Position .................23
Figure 1.3.0 Airflow Configuration for Orientation H .................... 25
Figure 1.3.1 Airflow Configuration for Orientation A ....................25
Figure 1.3.2 Airflow Configuration for Orientation F ....................25
Figure 1.3.3 Airflow Configuration for Orientation B .................... 25
Figure 1.3.4 Airflow Configuration for Orientation R ....................26
Figure 1.3.5 Airflow Configuration for Orientation C .................... 26
Figure 1.3.6 Airflow Configuration for Orientation V ....................26
Figure 1.3.7 Airflow Configuration for Orientation D .................... 26
Figure 1.3.8 Airflow Configuration for Orientation E ....................26
Figure 1.3.9 Airflow Configuration for Orientation G .................... 26
Figure 1.3.10 Airflow Configuration for Orientation J ................... 27
Figure 1.3.11 Airflow Configuration for Orientation K ..................27
Figure 1.3.12 Airflow Configuration for Orientation L ...................27
Figure 1.3.13 Airflow Configuration for Orientation M ..................27
Figure 1.3.14 Airflow Configuration for Orientation N ..................27
Figure 1.3.15 Airflow Configuration for Orientation P ..................27
Figure 1.3.16 Plan View of Airflow During Energy Recovery Mode
.................................................................................................28
Figure 1.3.17 Plan View of Airflow During Bypass Mode .............. 29
Figure 1.3.18 Plan View of Airflow During Recirculation Mode .....29
Figure 1.4.0 Gas Heat Module (typical) .......................................30
Figure 1.4.1 Electric Heat Module (typical) ..................................30
Figure 1.4.2 Water Coil (typical) .................................................30
Figure 1.5.0 DX Coil (typical) ...................................................... 31
Figure 1.5.1 Hot Gas Reheat Coil ................................................31
Figure 5.4.0 DN-2 Single Phase Power Wiring Schematic ...........46
Figure 5.4.1 DN-2, DN-3 Three Phase Power Wiring Schematic ..47
Figure 5.4.2 DN-5 Three Phase Power Wiring Schematic ............ 48
Figure 5.4.3 DN-2, DN-3, DN-5 Typical Control Wiring ................49
Figure 5.4.4 DN-2, DN-3, DN-5 Typical Field Wiring ...................50
Figure 2.2.0 EC Fan Assembly (standard) ...................................32
Figure 2.2.1 Asynchronous Motor Fan Assembly (optional) ..........32
Figure 2.3.0 EA Fan with Damper (behind) .................................33
Figure 2.3.1 OA Damper and Actuator ........................................33
Figure 2.3.2 Face and Bypass Dampers .....................................33
Figure 2.3.3 Bypass Assy Viewed From Front .............................34
Figure 2.3.4 Recirculation Damper Inside Bypass Assembly ........ 34
Figure 2.6.0 Integrated Controls Installed ...................................35
Figure 2.11.0 Optional Overflow Switch ......................................36
Figure 3.1.0 DN-2-IN Approximate Corner Weights .....................38
Figure 3.1.1 DN-3-IN Approximate Corner Weights .....................39
Figure 3.1.2 DN-5-IN Approximate Corner Weights .....................39
Figure 5.2.0 Class I Damper (typical) ......................................... 41
Figure 5.2.1 Duct Flange on Damper (typical) ............................. 41
Figure 5.3.0 Factory-Recommended Electric Service Entry ......... 42
Figure 5.3.1 Disconnect Switch (typical).....................................43
Figure 5.3.2 Low Voltage Terminal Blocks Installed ....................43
Figure 5.3.3 Field Wiring ............................................................44
Figure 5.3.4 24 VAC Power Supply Transformer .......................... 45
Figure 5.5.0 Suction Line for DX Coil ..........................................51
Figure 5.5.1 Condensate Drain Location (typical) ........................ 52
Figure 5.5.2 SA Fan Module Located Before the Coil Module ......52
Figure 5.5.3 SA Fan Module Located After the Coil Module ......... 52
Figure 5.5.4 Condensate Drain Trap Clearances .........................53
Figure 5.5.5 Typical Drain Trap Construction ..............................53
Figure 5.5.6 Positive PressureDrain Trap Consruction .................54
Figure 5.5.7 Negative Pressure Drain Trap Construction .............54
Figure 5.5.8 Type “P” Positive Pressure Waterless Trap ..............55
Figure 5.5.9 Type “N” Negative Pressure Waterless Trap ............ 55
Figure 7.1.0 End View of Core Support Assembly ........................60
Figure 7.1.1 Current Switch (typical) ........................................... 62
Figure 7.1.2 Door Latch Adjustment ............................................62
Figure 7.1.3 Single Phase EC Motor Wiring Connections .............. 63
Figure 7.1.4 Three Phase EC Motor Wiring Connections...............63
Figure 7.1.5 Asynchronous Motor and Fan Assembly Correct
Overlap is .14" ........................................................63
Figure 7.3.0 DN Service Parts ....................................................66