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RenewAire DN-Series, DN-2, DN-3, DN-5, DN-2-JIN Installation, Operation & Maintenance Manual

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DN-Series DOAS Indoor
INSTALLATION, OPERATION & MAINTENANCE MANUAL
FOR COMMERCIAL APPLICATIONS
Model DN-2-JIN Shown
WWW.RENEWAIRE.COM
DN-Series DOAS Indoor
IMPORTANT SAFETY INFORMATION
WARNING
ARC FLASH AND ELECTRIC SHOCK HAZARD
Arc flash and electric shock hazard. Disconnect all electric power supplies, verify with a voltmeter that electric power is off and wear protective equipment per NFPA 70E before working within electric control enclosure. Failure to comply can cause serious injury or death. Customer must provide earth ground to unit, per NEC, CEC and local codes, as applicable. Before proceeding with installation, read all instructions, verifying that all the parts are included and check the nameplate to be sure the voltage matches available utility power. The line side of the disconnect switch contains live high-voltage. The only way to ensure that there is NO voltage inside the unit is to install and open a remote disconnect switch and verify that power is off with a volt meter. Refer to unit electrical schematic.
Follow all local codes.
CAUTION CAUTION
RISK OF ELECTRIC SHOCK OR EQUIPMENT DAMAGE
Whenever electrical wiring is connected, disconnected or changed, the power supply to the DOAS and its controls must be disconnected. Lock and tag the disconnect switch or circuit breaker to prevent accidental reconnection of electric power.
CAUTION
RISK OF CONTACT WITH HOT SURFACES
The blower motor and other electrical components are extremely hot during operation. Allow sufficient time for them to cool before working within the unit cabinet. Use extreme caution and wear protective gloves and arm protection when working on or near hot blower motors and electrical components.
CAUTION
RISK OF CONTACT WITH HIGH SPEED MOVING PARTS.
Disconnect all local and remote power supplies, verify with a voltmeter that electric power is off and all fan blades have stopped rotating before working on the unit. Do not operate this unit with any cabinet panels removed or prior to assembly of the modules
RISK OF ELECTRIC SHOCK
Optional VFDs use capacitors that will retain a high voltage charge even after power is disconnected. After fans come to a complete stop, wait for five minutes for the capacitors to discharge themselves.
CAUTION CAUTION
RISK OF DAMAGE TO ENTHALPIC CORES
Whenever working within the DOAS cabinet, protect the enthalpic cores from accidental damage. The core media is subject to damage from dropped tools or other foreign objects.
IMPORTANT
This unit is intended for general ventilating only. Do not use to exhaust hazardous or explosive materials and vapors. Do not connect this equipment to range hoods, fume hoods or collection systems for toxics.
IMPORTANT
This unit is for ventilating finished structures only. It is not to be used until after all construction has been completed and construction debris and dust are cleaned from the Occupied Space.
RISK OF DAMAGE TO ENTHALPIC CORES
Low air flow can cause fouling of the enthalpic cores. The DOAS must never be operated without clean filters in place and minimum airflow must be greater than 250 CFM per full-sized core.
IMPORTANT
Do not release refrigerant into the atmosphere! If required service procedures include the adding or removal of refrigerant, the service technician must comply with all federal, state and local laws. The procedures discussed in this manual should only be performed by a qualified, EPA Certified technician.
IMPORTANT
This equipment is to be installed by following Industry Best Practices and all applicable codes. Any damage to components, assemblies, subassemblies or the cabinet which is caused by improper installation practices will void the warranty.
DN-Series DOAS Indoor
IMPORTANT USER INFORMATION
SAVE THIS MANUAL
NOTICE
This manual contains space for maintaining written records of unit maintenance and / or repairs. See Section 12.0 Maintenance Records. At the time the DOAS is commissioned, a maintenance schedule should be developed by the user to incorporate monthly and seasonal maintenance and include start-up maintenance tasks as described in this manual.
DN DOAS UNIT INFORMATION
In the unlikely event that factory assistance is ever required, information located on the unit label will be needed.
D - -- -N J
-
-
The installing contrac­tor is to fill in the unit Configuration Code as
shown at left. When installation is complete, the manual is to be turned over to the owner.
Configuration (Option) Code
Unit Label (typical)
3 1.800.627.4499 INSTALLATION, OPERATION AND MAINTENANCE MANUAL RENEWAIRE.COM
DN-Series DOAS Indoor
TABLE OF CONTENTS
INSTALLATION, OPERATION & MAINTENANCE
MANUAL 1
DN DOAS UNIT INFORMATION 3
RENEWAIRE CONFIGURATION CODE 7
1.0 OVERVIEW 8
1.1 DESCRIPTION 8
1.1.2 Energy Recovery 8
1.1.2 Makeup Air 8
1.1.3 Heating 8
1.1.4 Cooling 8
1.1.5 Reheat 8
1.2 MODEL SIZES 8
1.3 AIRFLOWS 10
1.3.1 Airflow Inlet and Outlet Configurations 10
1.3.2 DOAS Internal Airflow Configuration 14
1.4 DAMPERS 16
1.5 HE ATING 17
1.5.1 Gas Heater Module 17
1.5.2 Electric Heat 17
1.5.3 Water Coil / Steam Coil 17
1.6 COOLING 18
1.6.1 Split DX 18
1.6.2 Chilled Water Cooling 18
1.7 REHEAT 18
2.0 COMPONENT DESCRIPTION 19
2.1 CABINET CONSTRUCTION 19
2.1.1 Cabinet Paint 19
2.2 FAN MOTORS 19
2.3 FAN SPEED CONTROL 20
2.4 DAMPERS 20
2.5 ENTHALPIC CORE 20
2.6 FILTERS 20
2.6.1 Filter Monitors 20
2.7 GAS HEAT MODULE (OPTIONAL) 20
2.8 ELECTRIC HEATER MODULE (OPTIONAL) 20
2.9 SPLIT DX COOLING (OPTIONAL) 21
2.10 HOT GAS REHEAT (OPTIONAL) 21
2.11 CHILLED WATER COOLING (OPTIONAL) 21
2.12 HOT WATER / STEAM HEATING (OPTIONAL) 21
2.12 CONTROLS 22
2.12.1 Microprocessor Commercial Controls 22
2.13 OPTIONAL CONTROL ACCESSORIES 23
2.13.1 Carbon Dioxide Control 23
2.13.2 Digital Time Clock 23
2.13.3 Indoor Air Quality Sensor (IAQ) 23
2.13.4 Motion Occupancy Control 24
2.13.5 Smoke Detector 24
2.13.6 Optional Overflow Switch 24
2.14 COMPANION ACCESSORIES 24
2.14.1 Waterless Drain Traps 24
3.0 UNIT DRAWINGS 25
3.1 DOAS DN-2 DIMENSIONED DRAWING 25
3.2 DOAS DN-3 DIMENSIONED DRAWING 26
3.3 DOAS DN-5 DIMENSIONED DRAWING 27
3.4 DOAS DN-2 CORNER WEIGHTS 28
3.5 DOAS DN-3 CORNER WEIGHTS 28
3.5 DOAS DN-5 CORNER WEIGHTS 29
4.0 SHIPPING / RECEIVING / HANDLING 30
4.1 UNIT WEIGHTS / DIMENSIONS 30
4.1.1 Unit Dimensions and Weight 30
4.1.2 Shipping Dimensions and Weight 30
4.2 RECEIVING 31
4.3 RIGGING 31
4.4 HANDLING AND STORAGE 31
5.0 UNIT PLACEMENT 31
5.1 SOUND ATTENUATION OUTSIDE THE BUILDING 31
5.2 PLACEMENT CAUTIONS 31
5.3 SERVICE CLEARANCES 31
6.0 INSTALLATION 32
6.1 CURB ASSEMBLY AND PL ACEMENT 32
6.2 UNIT PLACEMENT 32
6.3 HOOD INSTALLATION 32
6.4 DUCT CONNECTIONS 32
6.4.1 Indoor Sound Attenuation 32
6.5.1 Factory-Recommended Gas Service Entry 33
6.6 ELECTRICAL REQUIREMENTS 33
6.6.1 High Voltage Electrical Connections 33
6.6.2 Factory-Recommended Electric Service Entry 33
6.6.3 High Voltage Supply Circuits 34
6.6.4 Low Voltage Electrical Connections 35
6.6.5 Low Voltage Terminal Blocks 35
6.6.6 Low Voltage Terminal Blocks Layout 35
6.7 PIPING CONNECTIONS 36
6.7.1 Coil Connections 36
6.7.2 Gas Heater Connections 36
6.7.3 Drain Traps 37
6.7.4 Drain Trap Construction 39
6.7.5 Waterless Drain Traps 40
6.8 WIRING SCHEMATICS 42
6.8.1 Typical Input Power 42
6.8.2 Typical Control Wiring 45
6.8.3 Typical Field Wiring 46
6.9 CONTROL CONNECTIONS 47
7.0 CONTROL CONTRACTOR INFORMATION 47
7.1 24 VAC CLASS II POWER SUPPLY 47
7.2 POINTS LIST 48
7.3 EXTERNAL CONTROL CONNECTIONS 49
7.4 SEQUENCE OF OPERATION 49
8.0 PRE START-UP 50
8.1 VERIFY VOLTAGES 50
8.2 VERIFY TRANSFORMER WIRING 50
8.3 INSPECT FILTERS 50
8.7 INSPECT FANS 50
8.8 INSPECT AND CLEAN THE INTERIOR 50
8.9 INSPECT DUCTWORK CONNECTIONS 50
9.1 VERIFY CORRECT FAN ROTATION DIRECTION 50
9.2 BASIC OPERATIONAL CHECK 50
9.2.1 Current Switches 50
10.0 MAINTENANCE 51
10.1 MAINTENANCE 24 HRS. AFTER START-UP 51
10.2 MAINTENANCE 30 DAYS AFTER START-UP 51
10.3 MAINTENANCE SCHEDULE 51
10.4 FI LTERS 51
10.5 SERVICE PARTS 52
11.0 MAINTENANCE REFERENCE 53
11.1 CABINET MAINTENANCE 53
11.2 ELECTRIC MOTOR MAINTENANCE 54
11.2.1 Motor Cleanliness 54
11.2.2 VFDs (optional) 54
11.3 ENTHALPIC CORE MAINTENANCE 55
11.3.1 Removal of Enthalpic Cores 55
11.3.2 Reinstallation of Enthalpic Cores 55
11.4 FAN / MOTOR REMOVAL 56
11.5 COILS 58
11.5.1 Coil Maintenance / Removal 58
11.6 DOOR LATCH ADJUSTMENT 59
11.7 GAS HEAT MODULE MAINTENANCE 59
11.8 ELECTRIC HEAT MODULE MAINTENANCE 59
11.9 WATER TREATMENT MAINTENANCE 60
11.10 CONDENSATE DRAIN MAINTENANCE 60
11.11 CURRENT SWITCHES 60
11.12 WINTERIZATION 60
11.13 DAMPER MAINTENANCE 61
11.14 FAN MAINTENANCE 61
11.15 TROUBLESHOOTING 61
11.16 Factory Assistance 61
12.0 MAINTENANCE RECORDS 62
DN-Series DOAS Indoor
5 1.800.627.4499 INSTALLATION, OPERATION AND MAINTENANCE MANUAL RENEWAIRE.COM
TABLE OF ILLUSTRATIONS
DN-Series DOAS Indoor
Unit Label (typical) 3 DN DOAS Modules 9 DN DOAS with Alternate SA Fan Position 9 Plan View of Typical Airflow Through DN DOAS 15 Plan View of Bypass (Economizer) Airflow 15 Bypass Assy Viewed From Front 16 EA Fan with Damper (behind) 16 Face and Bypass Dampers 16 Recirculation Damper Inside Bypass Assembly 16 OA Damper and Actuator 16 Gas Heater Module (typical) 17 Electric Heater (typical) 17 DX Coil (typical) 18 Hot Gas Reheat Coil 18 EC Fan Assembly (typical) 19 Lifting Lug (typical) 19 Asynchronous Motor Fan Assembly (typical) 19 Enthalpic Core (typical) 20 Electric Heater (typical) 21 Water Coil (typical) 21 Electric Heater Control Panel (typical) 21 RenewAire Commercial Controller 22 Premium Commercial Controls Installed 22 RenewAire Commercial Controller Expansion Board 22 Carbon Dioxide Sensor, Wall Mount 23 Time Clock, Panel Mount 23 IAQ Sensor, Wall Mount 23 Time Clock, Exterior Enclosure 23 Carbon Dioxide Sensor, Duct Mount 23 IAQ Sensor, Duct Mount 23 Time Clock, Exterior, Open 23 Ceiling Mount Occupancy Sensor 24 Smoke Detector 24 Optional Overflow Switch 24 Wall Mount Occupancy Sensor 24 DOAS DN-2 Dimensions 25 DOAS DN-3 Dimensions 26 DOAS DN-5 Dimensions 27 DOAS DN-2 Approximate Corner Weights 28 DOAS DN-3 Approximate Corner Weights 28 DOAS DN-5 Approximate Corner Weights 29 Class I Damper (typ) 32 Duct Flange on Damper (typ) 32 Factory-Provided Electric Service Entry 33 Disconnect Switch (typ) 34 Low Voltage Terminal Blocks Installed 35 Low Voltage Terminal Blocks Layout 35 Drain Pan Connection 37 Condensate Drain Locations (typ) 37 Positive Pressure Drain Trap Construction 39 Typical Drain Trap Construction 39 Negative Pressure Drain Trap Construction 40 Type “P” Positive Pressure Waterless Trap 41 Type “N” Negative Pressure Waterless Trap 41 24 VAC Power Supply Transformer 47 Table: Clean Filter Pressure Drop (in. w.g.) 51 DOAS Service Parts 52
End View of Core Support Assembly 55 Single Phase EC Motor Wiring Connections 56 Fan and Motor Assembly 56 Three Phase EC Motor Wiring Connections 56 Door Latch Adjustment 59 Current Switch (typical) 60
TABLE OF WIRING SCHEMATICS
DN-2 Single Phase Power Wiring Schematic 42 DN-2, DN-3 Three Phase Power Wiring Schematic 43 DN-5 Three Phase Power Wiring Schematic 44 DN-2, DN-3, DN-5 Typical Control Wiring 45 DN-2, DN-3, DN-5 Typical Field Wiring 46
RENEWAIRE CONFIGURATION CODE
CONFIGURATION CODE FOR DN DOAS
DN-Series DOAS Indoor
MODEL NUMBER
DIGIT NUMBER
Digits 1-5:
"DN-2-" = 1,650 CFM "DN-3-" = 3,300 CFM "DN-5-" = 4,950 CFM
Digit 6:
"J" = G5 Core
Digits 7-8:
"IN" = Indoor "RT" = Rooftop
Digit 9:
"B" = Before Coil (Standard) "A" = After Coil
Digit 10:
"A", "B", "C", "D", "E", "F", "G", "H", "J", "K", "L", "M", "N", "P", "R", "V"
Digit 11:
"1" = 1 inch "2" = 2 inch with Thermal Break
Digit 12:
"1" = Single Phase "3" = Three Phase
Digit 13:
"3" = 208V "4" = 460V "5" = 230V "8" = 575V
Digit 16:
"-" = None "C" = Chilled Water "D" = Direct Expansion "H" = Heat Pump "P" = Heat Pump + Hot Gas Reheat (HGRH) "R" = Direct Expansion + Hot Gas Reheat (HGRH)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
Model
Exchanger Type
Location (see Restriction 1)
SA Fan Location (See Restrictions 17 & 18)
Orientation
Insulation
Phase (see Restriction 14)
Voltage (see Restrictions 2 & 7)
Cooling
-- -- -J
Digit 17:
"-" = None "E" = Electric Heater "G" = Gas Heat Module "P" = Heat Pump "S" = Steam "H" = Hot Water
Digit 18:
"-" = None "1" = Gas 50 MBH or Electric 5kW "2" = Gas 75 MBH or Electric 10kW "3" = Gas 100 MBH or Electric 15kW "4" = Gas 125 MBH or Electric 20kW "5" = Gas 150 MBH or Electric 25kW "6" = Gas 200 MBH or Electric 30kW "7" = Gas 250 MBH or Electric 40kW "8" = Gas 300 MBH or Electric 50kW "9" = Gas 350 MBH or Electric 60kW
Digit 19:
"E" = EC M "V" = VFD
Digit 20:
"N" = Non-Fused (Standard) "F" = Fused
Digit 21:
"2" = No "4" = Yes
Digit 24:
"-" = None "P" = Standard Paint, No Customization "X" = Custom Unit, No Paint "Z" = Custom Unit and Paint
Digit 25:
"L" = Listed "N" = Non-Listed
Heating (see Restrictions 3 & 15)
Heater Size (see Restrictions 4, 8, 9, 10, 11, 12 & 13)
Fan Control (see Restrictions 5 & 6)
Unit Fusing
BacNet Factory Activation
Customization
Safety Listing (see Restriction 16)
-
*NOTES: Digits 3, 5, 14, 15, 22 & 23 are unused in this model.
Restrictions:
1: Location Code "RT" only available with Orientation Codes "H", "V", "R" & "F". 2: Voltage Code "4" & "8" only available with Phase Code "3". 3: Heating Code "P" only available and must be selected with Cooling Codes "H" or "P". 4: Heater Size Option only available with Heating Codes "E" & "G". 5: Fan Control Code "E" only available with Voltage Codes "3", "4" and "5". 6: Fan Control Code "V" only available with Phase Code "3". 7: Voltage Code "8" only available with Fan Control "V". 8: Heater Size Codes "8" and “9" are not available when Model Code is “DN-2-” and Heating Code is “E”. 9: Heater Size Codes "8" and "9" are not available when Model Code is “DN-3-” or "DN-5-" and Unit Voltage Code is “3” or “5” and Fan Control Code is “V” and Heating
Code is “E”. 10: Heater Size Code "9" is not available when Model Code is “DN-3-” or "DN-5-" and Unit Voltage Code is “3” or “5” and Fan Control Code is “E” and Heating Code is “E”. 11: Heater Size Code "7" is not available when Model Code is “DN-5-” and Unit Voltage Code is “3” or “5” and Fan Control Code is “V” and Heating Code is “E”. 12: Heater Size Codes "5", “6”, and “7” are not available when Model Code is “DN-2-” and Heating Code is “G”. 13: Heater Size Codes “8” and “9” are not available when Model Code is “DN-2-” or “DN-3-” and Heating Code is “G”. 14: Phase Code "1" only available with Model Code "DN-2-". 15: Heating Code "E" not available with Phase Code "1". 16: Some units with Customization Code "X" are not Safety Listed. 17: SA Fan Location Code "A" is not available when no coils are selected. 18: SA Fan Location Code "B" is not available when only coils are selected for Heating and Cooling and Orientation Codes are "B", " D", "F", "J", "K", "N", "P" or "V".
7 1.800.627.4499 INSTALLATION, OPERATION AND MAINTENANCE MANUAL RENEWAIRE.COM
OVERVIEW
NOTE: This unit is a Dedicated Outdoor Air System, or DOAS. It is
commonly referred to throughout this manual as a DOAS. This manual is specif­ically for the indoor version, as indicated by digits 7 & 8 of the configuration code, “IN”.
There is also an outdoor version of this DOAS, as in­dicated by digits 7 & 8 of the configuration code, “RT”.
The outdoor version of the DOAS has a separate man­ual.
DN-Series DOAS Indoor
1.0 OVERVIE W
1.1 DESCRIPTION
This unit is an indoor Dedicated Outdoor Air System (DOAS) that provides makeup air that is optionally heated, cooled and dehumidified to a conditioned space. The air that is drawn through the unit also goes through enthalpic cores to recover energy from exhaust air. It may be configured with internal heating and/or cooling hardware or it may be connected to external hardware such as a chilled water system or a heat pump or a steam source. It has two dedicated variable speed plenum fans and a sophisticated on-board electronic control package that offers many different control options. The DOAS is available in three different sizes and may be ordered in either an indoor or a rooftop (outdoor) version.
Each unit is constructed in the form of modules, with each module performing a dedicated function. Each module has configurable options that can be selected by the user. See the illustrations on
following page.
1.1.2 Energy Recovery
Energy recovery is accomplished by means of integral 5th generation static plate enthalpic cores. Stale air that is being exhausted from the Occupied Space passes through the enthalpic cores where both sensible and latent energy are recovered into the Supply Air airstream.
1.1.2 Makeup Air
Makeup air is air that is needed by the Occupied Space to replace air that is otherwise lost or exhausted from the building. In some cases, air is being drawn from the building by the air handler itself, in the form of Return Air. The Premium Controls package supplied with each unit senses variations in air pressures and causes the unit to deliver the makeup air as needed. Makeup air is generally conditioned by either heating or cooling the air before it is delivered to the Occupied Space.
IMPORTANT
This DOAS will optionally contain chilled water coils, steam coils, hot water coils and DX coils, all of which are to be connected to owner-provided equipment. The DOAS does not include DX compressors. The DOAS will provide low-voltage digital and analog signals to call for operation and modulation of the owner-provided equipment. No refrigerant control valve (TXV) is provided and must be specified by the engineer of the overall system for separate sourcing.
1.1.3 Heating
Heating options include: Integral indirect gas-fired heat module, either natural gas or propane Integral electric heater Integral hot water coil, for connection to an external hot water source (by others) Integral coil for connection to an external heat pump (by others) Integral coil for steam heat (steam by others)
1.1.4 C ooling
Cooling options include: Integral DX coil, for connection to an external compressor (by others) Integral chilled water coil, for connection to an external chilled water source (by others) Intetgral water coil for connection to an external heat pump (by others)
1.1.5 Reheat
Reheat is accomplished by means of an optional Hot Gas Reheat coil (HGRH). The HGRH coil is installed within the unit and is to be connected to an external compressorized refrigerant system, furnished by others.
1.2 MODEL SIZES
The indoor DOAS is available in three different sizes: Model DN-2: 1,650 cfm (small cabinet size) Model DN-3: 3,300 cfm (medium cabinet size) Model DN-5: 4,950 cfm (large cabinet size)
DN-Series DOAS Indoor
OVERVIEW
HEAT MODULE
(gas heater
Shown)
CONTROLS
MODULE
COIL MODULE DX Coil, HGRH
Shown
(may be moved
before fan)
EA FAN MODULE
SA FAN MODULE
(shown in fan-be-
fore-coil position)
DN DOAS Modules
ENERGY RECOVERY
MODULE
Bypass and Filter
Assys Shown
SA Fan Module
(shown in fan-af-
ter-coil position)
DN DOAS with Alternate SA Fan Position
9 1.800.627.4499 INSTALLATION, OPERATION AND MAINTENANCE MANUAL RENEWAIRE.COM
OVERVIEW
EA
SA
RA
OA
1
1
1
1
2
2
2
2
Discharge Vertically
(through unit roof)
Discharge Vertically
(through unit floor)
Intake Vertically
(through unit floor)
Discharge Horizontally
(through unit side wall)
Discharge Horizontally
(through unit end wall)
Intake Horizontally
(through unit end wall)
Intake Vertically
(through unit roof)
Intake Horizontally
(through unit end wall)
EA Fan
SA Fan
DN-Series DOAS Indoor
1.3 AIRF LOWS
The DOAS has many configurations available for airflow inlet and/or outlet. The customer is to select each individual airstream location and then apply all four locations to the matrix at right, selecting the one example that fits all criteria. The identifying letter beneath each figure is shown on the configura­tion code. See configuration code digit 10.
1.3.1 Airflow Inlet and Outlet Configurations
IMPORTANT
It is important to understand and use the equipment airstream terminology as it is used in this manual. The airstreams are defined as:
• OUTSIDE AIR (OA): Air taken from the external atmosphere and, therefore, not previously circulated through the system. Each DOAS has an OA air inlet, optionally located on either the roof or the end wall.
• FRESH AIR (FA): Air that is ready for conditioning. In some cases, FA is a blend of OA and RA, which is then conditioned and becomes SA.
• SUPPLY AIR (SA): Conditioned air that is supplied to an occupied space. Each DOAS has an SA outlet that may deliver either conditioned supply air or fresh air. The Supply Air outlet is optionally located on either the end wall or the floor.
• RETURN AIR (RA): Air that is returned to a heating or cooling appliance from a conditioned space. When the DOAS operates in recirculation mode, RA is conditioned and returned to the occupied space in the form of SA. Each DOAS has an RA inlet, optionally located on either the floor or the end wall of the unit.
• EXHAUST AIR (EA): Air that is removed from a heating or cooling appliance and discharged. Each DOAS has an EA outlet with a damper. The Exhaust Air outlet is optionally installed on either the side wall or the roof of the unit.
KEY TO AIRFLOW CODES
OA
Outside Air Into Unit
RA
Room Air Into Unit
SA
Supply Air Into Occupied Space
EA
Exhaust Air Leaving Unit
DN-Series DOAS Indoor
(through unit floor)
F
KEY TO CONFIGURATION CODES
OA
1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2
RA
1 1 1 1 2 2 2 2 1 1 1 1 2 2 2 2
SA
EA
CODE
1
1
1
1
2
1
2
1
1
1
1
1
2
1
2
1
1
2
1
2
2
2
2
2
1
2
1
2
2
2
2
2
H A F B R C V D E G J K L
M
N P
OVERVIEW
Discharge Horizontally (through unit end wall)
1
SA
Discharge Horizontally
(through unit side wall)
Discharge Horizontally
(through unit side wall)
1
EA
1
EA Fan
SA Fan
OA
Intake Horizontally
(through unit end wall)
1
1
Intake Horizontally
(through unit end wall)
Discharge Horizontally (through unit end wall)
RA
Discharge Horizontally (through unit side wall)
1
SA
H
EA
EA Fan
OA
Intake Horizontally
(through unit end wall)
1
Discharge Horizontally (through unit side wall)
1
EA
1
EA Fan
SA Fan
A
EA
EA Fan
Intake Vertically
(through unit roof)
2
Intake Vertically
(through unit roof)
2
OA
Intake Horizontally
(through unit end wall)
1
RA
OA
SA Fan
SA
2
Discharge Vertically
1
Intake Horizontally
(through unit end wall)
RA
SA
2
Discharge Vertically
(through unit floor)
SA Fan
B
1
Intake Horizontally
(through unit end wall)
RA
11 1.800.627.4499 INSTALLATION, OPERATION AND MAINTENANCE MANUAL RENEWAIRE.COM
OVERVIEW
DN-Series DOAS Indoor
Discharge Horizontally (through unit end wall)
1
SA
Discharge Horizontally
(through unit side wall)
Discharge Horizontally
(through unit side wall)
1
EA
Discharge Horizontally
1
EA Fan
OA
Intake Horizontally
(through unit end wall)
1
Discharge Horizontally (through unit end wall)
(through unit side wall)
EA
1
EA Fan
Intake Vertically
(through unit roof)
2
OA
1
EA
EA Fan
SA Fan
R
2
Intake Vertically
(through unit floor)
RA
OA
Intake Horizontally
(through unit end wall)
1
SA
Discharge Horizontally
(through unit side wall)
EA
1
EA Fan
SA Fan
C
Intake Vertically
(through unit floor)
Intake Vertically
(through unit roof)
2
RA
2
OA
SA
Discharge Vertically
(through unit floor)
Discharge Horizontally (through unit end wall)
1
SA
EA
SA Fan
D
Discharge Vertically
2
(through unit roof)
EA Fan
SA Fan
G
2
Intake Vertically
(through unit floor)
Intake Vertically
(through unit roof)
2
RA
OA
1
Intake Horizontally
(through unit end wall)
RA
SA Fan
SA
RA
2
V
EA
Discharge Vertically
2
(through unit roof)
EA Fan
SA Fan
2
Intake Vertically
(through unit floor)
OA
Intake Horizontally
(through unit end wall)
1
1
Intake Horizontally
(through unit end wall)
RA
Discharge Horizontally (through unit end wall)
1
Discharge Vertically
(through unit floor)
SA
2
E
Intake Vertically
EA
Intake Vertically
Discharge Vertically
2
(through unit roof)
EA Fan
OA
Intake Horizontally
(through unit end wall)
1
DN-Series DOAS Indoor
EA
2
EA Fan
OVERVIEW
Discharge Vertically
(through unit roof)
Intake Vertically
(through unit roof)
2
OA
SA
Discharge Vertically
(through unit floor)
Discharge Horizontally (through unit end wall)
1
SA
SA Fan
2
J
EA
Discharge Vertically
2
(through unit roof)
EA Fan
SA Fan
L
Intake Vertically
(through unit floor)
Intake Horizontally
(through unit end wall)
RA
OA
Intake Horizontally
(through unit end wall)
RA
2
SA
2
Discharge Vertically
(through unit floor)
1
Discharge Horizontally (through unit end wall)
1
SA
EA
SA Fan
K
Discharge Vertically
2
(through unit roof)
EA Fan
SA Fan
M
(through unit roof)
2
2
Intake Vertically
(through unit floor)
1
1
Intake Horizontally
(through unit end wall)
RA
OA
Intake Horizontally
(through unit end wall)
RA
EA
Discharge Vertically
2
(through unit roof)
EA Fan
SA Fan
SA
2
Discharge Vertically
(through unit floor)
N
Intake Vertically
(through unit floor)
2
OA
Intake Horizontally
(through unit end wall)
1
RA
SA
2
Discharge Vertically
(through unit floor)
EA
Discharge Vertically
2
(through unit roof)
EA Fan
SA Fan
P
(through unit roof)
2
2
Intake Vertically
(through unit floor)
OA
RA
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OVERVIEW
DN-Series DOAS Indoor
1.3.2 DOAS Internal Airflow Configuration
Within the DOAS, airstreams can be redirected as a result of changes in the bypass or recirculation dampers. In normal operation, typical airflow is through the enthalpic cores and then through the fan module. If the bypass function is activated, the FA airstream is redirected through the bypass assem­bly instead of through the cores. If the optional recirculation function is activated, the recirculation damper is opened and the airstream again bypasses the enthalpic cores.
An economizer (bypass) mode is available on all DOAS units. Bypass mode is activated when the Outside Air enthalpy is less than the Return Air enthalpy and free cooling is desired. When the DOAS enters economizer mode, the bypass damper opens and the face damper closes, causing the outdoor air stream to bypass the energy recovery cores. Bypass mode is used only for economizer. Outside Air bypasses the enthalpic cores. The face and bypass dampers are modulated for no or limited energy recovery. See illustrations on following page.
A recirculation mode is optionally available on all DOAS units. Recirculation is used only at night during the Unoccupied Mode. It takes Return Air and bypasses the enthalpic cores and then adds cooling or heat to the air stream. Recirculation mode is enabled by going to the Schedule section of the controller menu (Main Menu / Settings / Scheduler) and setting a schedule and set points.
To accomplish recirculation, a damper is installed in the bypass assembly of the unit. See damper illustration Recirculation Damper Inside Bypass Assembly on page 16.
DN-Series DOAS Indoor
TYPICAL OF SMALL AND MEDIUM CABINETS
PLAN VIEW
Energy Recovery
Module
Fan
Module
Cooling/
Controls
Module
Heat
Module
Bypass Damper (closed)
Face
Damper
(open)
Energy
Recovery
Cores
Bypass (Economizer)/
Recirculation Assembly
TYPICAL OF SMALL AND MEDIUM CABINETS
PLAN VIEW
Plan View, Typical of DN-2 and DN-3 Models
OVERVIEW
Bypass
Damper
Bypass (Economizer)/
Recirculation Assembly
(closed)
Face
Damper
(open)
Heat
Module
Cooling/ Controls
Module
Plan View of Typical Airflow Through DN DOAS
Plan View, Typical of DN-2 and DN-3 Models
Fan
Module
Bypass
Damper
(open)
Bypass (Economizer)/
Recirculation Assembly
Energy Recovery
Module
Energy
Recovery
Cores
Face
Damper
(closed)
Heat
Module
Cooling/ Controls
Fan
Module
Module
Plan View of Bypass (Economizer) Airflow
Energy Recovery
Module
Energy
Recovery
Cores
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OVERVIEW
DN-Series DOAS Indoor
1.4 DAMPERS
Class I airfoil dampers are standard on all units. OA, EA, face and bypass dampers come as standard and a recirculation damper is optional.
All dampers are operated by 24 VAC electric actuators. The actuators are mounted on the inside of the unit. The actuators are controlled by the on-board Premium Controls system. The OA and EA dampers are powered open, spring return close. The bypass damper actuator is modulating.
Face and Bypass Dampers
OA Damper and ActuatorEA Fan with Damper (behind)
Bypass Damper
Face Damper
Recirculation
Damper
(solid line)
Bypass Assembly
(dotted line)
Bypass Assy Viewed From Front
Recirculation Damper Inside Bypass Assembly
DN-Series DOAS Indoor
1.5 HEATING
1.5.1 Gas Heater Module
DOAS units can have an optional heat module with an Indirect Gas-Fired Heater. The gas heater is factory-installed complete and ready for field-connection to gas supply and exhaust piping. The gas heat module is available in 5:1 or 10:1 modulation and controlled by an analog signal from the controller. Each module has a condensate discharge tube that must be trapped in the field and may require winterization. See the RenewAire Integral Indirect Gas-Fired Heater User Manual for more
information.
OVERVIEW
Gas Heater Module (typical)
1.5.2 Electric Heat
DOAS units can have an optional heat module with an electric heater. The open coil-type electric heater is factory-installed complete. Electric heaters are available in a number of different sizes and each heater has a control module that modulates the output of the heater. The heater control module is controlled by an analog signal from the controller. See illustration below. See the RenewAire Electric Heater Module User Manual for further information.
Electric Heater (typical)
1.5.3 Water Coil / Steam Coil
DOAS units can have an optional heat module with a hot water coil or steam coil installed in the heating module.
The unit controller provides a digital Enable signal to the user-provided hardware and then an analog signal to modulate the steam or water source.
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OVERVIEW
DN-Series DOAS Indoor
1.6 COOLING
1.6.1 Split DX
A DX refrigeration coil is offered as an option in the DOAS, for use as part of a split DX cooling system. The DX coil is engineered for R-410A refrigerant, but other refrigerants may be used. Consult your RenewAire sales representative for further information.
DX Coil (typical)
The refrigerant coil, as installed and shipped from the factory, is charged with compressed nitrogen gas. It is to be purged at time of connection to an external DX system. The DX coil is positioned above
a condensate drain pan that must be trapped by the user / installer. The condensate trap may require winterization.
1.6.2 Chilled Water Cooling
A chilled water coil is offered as an option in the DOAS. It may be used in conjunction with a us­er-supplied chilled water source.
It is the user’s responsibility to assess supply water conditions and verify suitability for use. In addi­tion, it is the user’s responsibility to winterize the water lines as needed.
RenewAire does not make any recommendations regarding minimum quality of cooling water nor for any treatments that may be needed.
If a chilled water coil is installed, it is the installer’s repsonsibility to provide and install a trap on the condensate drain pan. The trap is to be freeze-protected, as needed.
1.7 R EHEAT
A Hot Gas Reheat (HGRH) coil is optionally available. The HGRH coil is to be connected in the field to a user-supplied refrigerant system.
HGRH Coil
Hot Gas Reheat Coil
DN-Series DOAS Indoor
2.0 COMPONENT DESCRIPTION
2.1 CABINET CONSTRUCTION
• The DOAS is available in either single-thickness (1”) wall or double-thickness (2” thick, with thermal break) wall construction. See Digit 11 of the Configuration Code.
• The sheet metal exterior of the unit is 20 gauge galvanized steel.
• Doors and removable panels are secured with quarter-turn latches.
• All units are equipped with lifting lugs for hoisting by a crane and all units have integral openings located in the unit base for use of a fork lift.
See the DOAS Rigging Manual for rigging and handling instructions.
COMPONENT DESCRIPTION
Lifting Lug (typical)
2.1.1 Cabinet Paint
Four options are offered for exterior finishes of the unit.
• None (galvanized)
• White paint
• Gray paint
• Custom paint
2.2 FAN MOTORS
Each DOAS is equipped with direct-drive plenum-type blower / motor packages as standard. The motors are either Premium Efficiency Electronically Commutated (EC) or Premium Efficiency TEFC asynchronous, controlled by VFDs. EC motor assemblies are mounted on an air inlet cone which is then bolted to the air handler cabinet. Asynchronous motors are bolted to a sled to maintain position at the inlet cone. See Digit 19 of the Configuration Code.
EC Fan Assembly (typical) Asynchronous Motor Fan Assembly (typical)
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COMPONENT DESCRIPTION
The cores used in all DOASs are 5th gen­eration, static plate
enthalpic cores. They are commonly referred to in this manual as “cores”.
DN-Series DOAS Indoor
2.3 FAN SPEED CONTROL
When the unit is equipped with Electronically Commutated (EC) motors, fan speed control is accom­plished by a variable analog control signal from the microprocessor controller to the EC fan motor.
If asynchronous motors are ordered, fan speed is accomplished by on-board VFDs. See digit 19 of the Configuration Code.
2.4 DAMPERS
All dampers are Class I airfoil-type and are electrically actuated. See Section 1.4 of this manual for more information.
2.5 ENTHALPIC CORE
Every DOAS is equipped with enthalpic cores and the number of cores varies by DOAS model. All cores are similar in construction. See Digit 6 of the Configuration Code.
Enthalpic Core (typical)
2.6 FILTERS
Filters are an essential part of the DOAS and the unit should never be operated without properly installed filters. Filters are typically shipped installed in the unit. The standard filter is a 2 inch thick MERV 8. Optionally available are 4 inch thick MERV 8, 2 inch thick or 4 inch thick MERV 13 filters, and 2 inch or 4 inch thick MERV 14.
2.6.1 Filter Monitors
All DN DOAS air handlers are equipped with filter monitors. When the monitor system detects increased pressure drop across the filters, the controller provides an indication that the air filters are partially clogged and require changing.
2.7 GAS HEAT MODULE (OPTIONAL)
A single indirect gas-fired heat module is provided, when ordered. The gas heat module may be configured for either indoor installations or outdoor installations. A variety of sizes are available. The optional heater module has an on-board control panel to modulate the heat output. An analog 0 - 10 VDC signal is produced by the premium controller. The gas heat module is always installed in the lower part of the DOAS heat module and is always downstream of the fans. See digit 18 of the DOAS
Configuration Code. Also see the specific configuration code for gas heater modules, as shown in the RenewAire Integral Indirect Gas-Fired Heater Module User Manual.
2.8 ELECTRIC HEATER MODULE (OPTIONAL)
The optional electric heater module has an on-board control panel with a Solid State Relay (SSR) module to modulate the heat output. An analog 0 - 10 volt signal is produced by the commercial con­troller. Electric heater modules are always installed in the lower part of the DOAS heat module and is always downstream of the fans. See Digit 18 of the DOAS configuration code. Also see the specific
configuration code for electric heater modules, as shown in RenewAire Electric Heater Module User Manual.
DN-Series DOAS Indoor
Solid State
Relay (SSR)
Airflow
Proving
Switch
Electric Heater (typical) Electric Heater Control Panel (typical)
2.9 SPLIT DX COOLING (OPTIONAL)
All units that are ordered with optional split DX cooling have a factory-installed DX coil. The coil is charged with nitrogen gas and is to be purged by the installer. DX cooling coils are mounted above a condensate pan that must be trapped and winterized. Control of the owner-provided refrigerant compressor is accomplished by the on-board Premium Controller or by a BMS. The controller will provide a digital “enable” signal and then an analog modulating signal. See digit 16 of the DOAS
Configuration Code.
2.10 HOT GAS REHEAT (OPTIONAL)
COMPONENT DESCRIPTION
For humidity control, the DOAS may be ordered with an integral Hot Gas Reheat (HGRH) coil. The coil is to be supplied with refrigerant by an external DX compressor. It is shipped from the factory charged with nitrogen and is to be purged by the installer. Operation of the HGRH coil is controlled by the on­board Commercial Controller. See digit 16 of the DOAS Configuration Code.
2.11 CHILLED WATER COOLING (OPTIONAL)
An optional chilled water coil may be ordered for the DOAS. It may be connected to either an external chilled water source or to a heat pump. If it is used with a heat pump, the coil serves for both heating and cooling. Any chilled water coil is positioned above a stainless steel condensate pan, which will require trapping and freeze protection. For all cooling functions, control signals are sent from the on­board Premium Controller to the remote chilled water source. See digit 16 of the DOAS Configuration
Code.
2.12 HOT WATER / STEAM HEATING (OPTIONAL)
The DOAS may be ordered with either a hot water coil or a steam coil, for connection to an external water or steam source. See digit 17 of the DOAS Configuration Code.
Water Coil (typical)
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COMPONENT DESCRIPTION
DN-Series DOAS Indoor
2.12 CONTROLS
RenewAire provides the Premium Commercial Control package with or without a BACnet license.
See digit 21 of the Configuration Code. For further information on RenewAire commercial controls, see the RenewAire DN DOAS Integral Commercial Controls User Manual.
2.12.1 Microprocessor Commercial Controls
All DN DOAS units are equipped with RenewAire Premium Commercial Controls. The controller is a multi-function device that monitors operation of the DOAS and air conditions. It evaluates conditions such as temperatures, air pressures, air flows and air quality and then modulates the operation of the air handler to meet owner-specified set points. The controller can function as a stand-alone device or it can also be connected to a BMS. For detailed information on the Commercial Controller, see the
RenewAire DN DOAS Integral Commercial Controls User Manual.
RenewAire Commercial Controller RenewAire Commercial Controller Expansion Board
Optional VFDs Controller and
Expansion Board
Low Voltage Terminal Strips
Premium Commercial Controls Installed
DN-Series DOAS Indoor
2.13 OPTIONAL CONTROL ACCESSORIES
RenewAire offers a number of control accessories as options that are to be field-installed and wired directly to the low voltage terminal strip. See Section 6.6.5 of this manual. Depending on how the Commercial Controller is programmed by the user, each device functions either as an ON/OFF switch for the DOAS, or it will modulate the DOAS.
2.13.1 Carbon Dioxide Control
RenewAire offers two different types of CO2 sensors as optional control accessories: wall mount and duct mount. These sensors can be wired directly to the low-voltage terminal strip and function as ON/OFF switching controllers. The CO2 sensor uses 4.44 VA.
COMPONENT DESCRIPTION
Carbon Dioxide Sensor, Wall Mount
Carbon Dioxide Sensor, Duct Mount
2.13.2 Digital Time Clock
A digital time clock is offered as an optional control device. It is available in either a panel mount or an exterior enclosure. Time clocks can be wired directly to the low voltage terminal strip and function as ON/OFF switching controllers. The time clock draws 2.4 VA.
Time Clock, Panel Mount
Time Clock, Exterior Enclosure Time Clock, Exterior, Open
2.13.3 Indoor Air Quality Sensor (IAQ)
An Indoor Air Quality Sensor can be purchased to continuously monitor indoor air quality based on levels of total VOCs and function as an ON/OFF switch for the DOAS. It uses 0.84 VA.
IAQ Sensor, Wall Mount IAQ Sensor, Duct Mount
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COMPONENT DESCRIPTION
DN-Series DOAS Indoor
2.13.4 Motion Occupancy Control
A motion occupancy sensor is available as an optional control device in either ceiling mount or wall mount styles. These sensors can be wired directly to the low voltage terminal strip in the DOAS and function as ON/OFF controllers. It uses 0.7 VA.
Ceiling Mount Occupancy Sensor
Wall Mount Occupancy Sensor
2.13.5 Smoke Detector
A duct-mounted smoke detector is available to monitor for smoke and act as an ON/OFF switch for the DOAS. It draws 2.3 VA.
Smoke Detector
2.13.6 Optional Overflow Switch
The optional overflow switch is factory-installed on the condensate pan and wired directly to the low voltage terminal strip in the DOAS. If the water level in the pan should rise to an unacceptable level, the magnetic reed switch will cause the unit to shut down the fans and return the dampers to their normally-closed positions. The overflow switch is factory-wired to the controller ENABLE function so the DOAS will simply shut down whenever the water level rises too high and will then resume operation when the water level drops. If the overflow switch causes an override of the ENABLE function, the controller will show ENABLE OFF and it will not register as an ALARM condition.
2.14 COMPANION ACCESSORIES
2.14.1 Waterless Drain Traps
Waterless drain traps are offered as an option for field-installation in the condensate drain lines. They are offered in two different versions, one for negative pressure and one for positive pressure. For further information and images, see Section 6.7, Drain Traps in this manual.
Optional Overflow Switch
3.0 UNIT DRAWINGS
FRONT VIEW
ABBREVIATIONS
EA: Exhaust Air to outside
OA: Outside Air intake
RA: Room Air to be exhausted
SA: Supply Air to inside
INSTALLATION ORIENTATION
Unit must be installed in orientation
shown.
NOTE
1. UNLESS OTHERWISE SPECIFIED,
DIMENSIONS ARE ROUNDED TO THE
NEAREST EIGHTH OF AN INCH.
2. SPECIFICATIONS MAY BE SUBJECT
TO CHANGE WITHOUT NOTICE.
3. FOR PIPE CONNECTION DETAILS
REFER TO CORES OR UNIT SELECTION
SUBMITTAL.
4. UNIT, UNIT DOORS, AND COILS
CANNOT BE MIRRORED.
3.1 DOAS DN-2 DIMENSIONED DRAWING
40" Minimum
Service Area
24 1/8"
6"
12 1/8"
14"
OA Damper (Roof; Optional)
24" x 16" Duct Flange
RA (Floor; Optional)
EA Damper (Roof; Optional)
20" x 16" Duct Flange
24" x 16" Duct Flange
DN-Series DOAS Indoor
OA Damper
24" x 16" Duct Flange
12 1/8"
OA
11 7/8"
46"
RA
12 1/8"
RA Duct Flange
6 7/8"
DIMENSIONED DRAWINGS
RIGHT VIEW
24" x 16"
36" Minimum
Service Area
Area
22 3/4"
Service
Minimum
52 1/4"
48"
Case
60 3/4"
Overall
27"
30 5/8"
Door
Swing
Service Area
TOP VIEW
119 7/8" Minimum
14 1/8"
SA (Floor; Optional)
24" x 16" Duct Flange
OA
EA
(opt)
126" Overall
119 7/8" Case
Disconnect
Switch and
(2) 7/8" Holes
for Power and Controls
Field Wiring
Gas Heat
Combustion
Exhaust
(opt)
EBOX
EA
Connection
71 7/8"
Overall
SA
Case
66 7/8"
(opt)
SA
14 7/8"
RA
1" NPT
Condensate Drain
Gas Heat
(opt)
18 5/8"
SA Duct Flange
24" x 16"
Coil Connections
Locations Vary
Connections
Locations Vary
Gas Heat
LEFT VIEW
Combustion
Air Intake
EA Damper
20" x 16" Duct Flange
DOAS DN-2 Dimensions
48 3/4"
BACK VIEW
46"
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DIMENSIONED DRAWINGS
BACK VIEW
20" x 16" Duct Flange
ABBREVIATIONS
EA: Exhaust Air to outside
OA: Outside Air intake
RA: Room Air to be exhausted
SA: Supply Air to inside
INSTALLATION ORIENTATION
Unit must be installed in orientation
shown.
NOTE
1. UNLESS OTHERWISE SPECIFIED,
DIMENSIONS ARE ROUNDED TO THE
NEAREST EIGHTH OF AN INCH.
2. SPECIFICATIONS MAY BE SUBJECT
TO CHANGE WITHOUT NOTICE.
3. FOR PIPE CONNECTION DETAILS
REFER TO CORES OR UNIT SELECTION
SUBMITTAL.
4. UNIT, UNIT DOORS, AND COILS
CANNOT BE MIRRORED.
EA Damper (Roof; Optional)
20" x 16" Duct Flange
DN-Series DOAS Indoor
3.2 DOAS DN-3 DIMENSIONED DRAWING
75" Minimum
Service Area
OA Damper (Roof; Optional)
36" x 16" Duct Flange
RA (Floor; Optional)
36" x 16" Duct Flange
38 3/4"
20 3/4"
6"
14"
40"
Door Swing
OA Damper
36" x 16" Duct Flange
20 7/8"
OA
46"
RA
11 7/8"
20 3/4"
6 7/8"
RA Duct Flange
36" x 16"
RIGHT VIEW
36" Minimum Service Area
22 3/4"
Minimum
Service Area
74 1/8"
Case
77 3/8"
90 1/8"
Overall
38 3/4"
Service Area
141 3/4" Minimum
13 3/8"
55 3/8"
SA (Floor; Optional)
24" x 16" Duct Flange
TOP VIEW
147 7/8" Overall
(2) 7/8" Holes
for Power and Controls
OA
EA
(opt)
141 3/4" Case
Disconnect
Switch
and EBOX
Field Wiring
Gas Heat
Combustion
Exhaust
(opt)
EA
Connection
71 7/8"
Overall
66 7/8"
SA
Case
(opt)
SA
26 3/4"
14 7/8"
RA
1" NPT
(opt)
SA Duct Flange
24" x 16"
Coil Connections
Locations Vary
Condensate Drain
Gas Heat
Connections
Locations Vary
Gas Heat
Combustion
Air Intake
FRONT VIEW
LEFT VIEW
DOAS DN-3 Dimensions
48 3/4"
EA Damper
46"
3.3 DOAS DN-5 DIMENSIONED DRAWING
47"
32" x 20" Duct Flange
ABBREVIATIONS
EA: Exhaust Air to outside
OA: Outside Air intake
RA: Room Air to be exhausted
SA: Supply Air to inside
INSTALLATION ORIENTATION
Unit must be installed in orientation
shown.
NOTE
1. UNLESS OTHERWISE SPECIFIED,
DIMENSIONS ARE ROUNDED TO THE
NEAREST EIGHTH OF AN INCH.
2. SPECIFICATIONS MAY BE SUBJECT
TO CHANGE WITHOUT NOTICE.
3. FOR PIPE CONNECTION DETAILS
REFER TO CORES OR UNIT SELECTION
SUBMITTAL.
4. UNIT, UNIT DOORS, AND COILS
CANNOT BE MIRRORED.
DIMENSIONED DRAWINGS
DN-Series DOAS Indoor
EA Damper (Roof; Optional)
32" x 20" Duct Flange
OA Damper (Roof; Optional)
60" x 16" Duct Flange
RA (Floor; Optional)
60" x 16" Duct Flange
36" Minimum Service Area
22 3/4"
Minimum
Service Area
94 7/8"
91"
45 5/8"
15 1/2"
45 1/2"
Case
80" Minimum
5 1/4"
13 1/4"
29 1/2"
Service Area
40"
Door Swing
Service Area
168" Minimum
15 1/8"
OA Damper
TOP VIEW
168" Case
174" Overall
62 3/4" 15 5/8"
60" x 16" Duct Flange
OA
OA
(opt)
EA
(opt)
Disconnect
Switch
and EBOX
12"
SA
RA
(opt)
15 1/2"
6 7/8"
RA
SA
RA Duct Flange
60" x 16"
1" NPT
Condensate Drain
Coil Connections
(opt)
Gas Heat
Connections
RIGHT VIEW
Locations Vary
FRONT VIEW
Locations Vary
Overall
103 3/4"
SA (Floor; Optional)
24" x 16" Duct Flange
DOAS DN-5 Dimensions
(2) 7/8" Holes
for Power and Controls
Field Wiring
Gas Heat
Combustion
EA Damper
Exhaust
Connection
EA
88 7/8"
Overall
15"
Case
83 7/8"
33 1/2"
SA Duct Flange
53 3/8"
Gas Heat
Combustion
24" x 16"
Air Intake
LEFT VIEW
BACK VIEW
27 1.800.627.4499 INSTALLATION, OPERATION AND MAINTENANCE MANUAL RENEWAIRE.COM
DIMENSIONED DRAWINGS
MODELS L W A B UNIT LF LR RR RF
ERV 70.86 48 36.85 23.69 1250 329 321 296 304
ERV + Coil 95.36 48 51.51 22.9 1750 494 451 384 421
ERV + EH 95.36 48 47.21 23.18 1600 410 383 390 418
ERV + GH 95.36 48 51.11 21.5 7 1750 516 421 365 447
LR RR ERV + Coil + EH 119.89 48 60.41 22.79 2100 556 502 495 547
ERV + Coil + GH 119.89 48 64.46 21.55 2250 667 543 467 573
ERV + Coil + ST 119.89 48 63.53 22.06 2250 644 548 486 572
MODELS L W A B UNIT LF LR RR RF
ERV 72.86 50 37.85 24.69 1330 350 341 316 324
LF RF ERV + Coil 97.36 50 52.51 23.9 1850 521 477 407 445
ERV + EH 97.36 50 48.21 24.18 1700 435 407 415 443
ERV + GH 97.36 50 52.11 22.5 7 1850 543 447 388 472
ERV + Coil + EH 121.89 50 61.41 23.79 2220 586 532 524 577
ERV + Coil + GH 121.89 50 65.46 22.55 2370 699 574 495 602
ERV + Coil + ST 121.89 50 64.53 23.06 2370 676 579 514 601
OPTIONS
RECIRC
VFD
DN-2-IN 1" CABINET UNIT WEIGHTS (LBS)
DN-2-IN 2" CABINET UNIT WEIGHTS (LBS)
DN-2-IN
Add the additional weights for options to the Unit Weights to determine Unit and Corner weights for a specific unit.
Center of Gravity "A" and "B" Dimensions +/- 2"
Center of Gravity "A" and "B" Dimensions +/- 2"
ADDITIONAL WEIGHTS FOR OPTIONS (LBS)
UNIT
25
150
MODELS L W A B UNIT LF LR RR RF
ERV 70.86 77.42 36.24 38.21 1600 414 404 386 396
ERV + Coil 95.40 77.42 50.40 36.99 2300 635 581 518 567
ERV + EH 117.21 77.42 55.07 37.70 2350 566 538 607 639
LR RR ERV + GH 117.21 77.42 58.82 34.90 2650 730 599 595 725
ERV + Coil + EH 141.74 77.42 67.48 36.81 2900 724 656 722 797
ERV + Coil + GH 141.74 77.42 71.28 34.67 3275 909 738 729 899
ERV + Coil + ST 141.74 77.42 69.21 37.16 3100 787 727 761 825
MODELS L W A B UNIT LF LR RR RF
ERV 72.86 79.42 37.24 39.21 1725 446 435 416 427
ERV + Coil 97.40 79.42 51.4 37.99 2450 674 618 553 604
LF RF ERV + EH 119.21 79.42 56.07 38.7 2500 603 573 645 679
ERV + GH 119.21 79.42 59.82 35.9 2800 770 635 631 764
ERV + Coil + EH 143.74 79.42 68.48 37.81 3100 774 703 773 850
ERV + Coil + GH 143.74 79.42 72.28 35.67 3475 963 785 776 952
ERV + Coil + ST 143.74 79.42 70.21 38.16 3300 837 774 811 877
OPTIONS
RECIRC
VFD
DN-3-IN 1" CABINET UNIT WEIGHTS (LBS)
Center of Gravity "A" and "B" Dimensions +/- 2"
DN-3-IN 2" CABINET UNIT WEIGHTS (LBS)
Center of Gravity "A" and "B" Dimensions +/- 2"
DN-3-IN
Add the additional weights for options to the Unit Weights to determine Unit and Corner weights for a specific unit.
ADDITIONAL WEIGHTS FOR OPTIONS (LBS)
UNIT
25
175
DN-Series DOAS Indoor
3.4 DOAS DN-2 CORNER WEIGHTS
DOAS DN-2 Approximate Corner Weights
3.5 DOAS DN-3 CORNER WEIGHTS
DOAS DN-3 Approximate Corner Weights
3.5 DOAS DN-5 CORNER WEIGHTS
MODELS L W A B UNIT LF LR RR RF
ERV 78.04 91 39.23 44.51 2600 668 639 632 661
ERV + Coil 109.78 91 53.08 44.58 3300 814 782 835 869
ERV + EH 136.26 91 61.09 44.2 9 3550 817 775 953 1005
LR RR ERV + GH 136.26 91 63.72 43.38 3800 930 847 964 1059
ERV + Coil + EH 168.00 91 74.54 44.25 4250 969 917 1150 1215
ERV + Coil + GH 168.00 91 78.46 43.4 4450 1087 991 1131 1241
ERV + Coil + ST 168.00 91 74.33 44.43 4300 974 929 1171 1227
MODELS L W A B UNIT LF LR RR RF
ERV 80.04 93 40.23 45.51 2725 699 670 663 692
ERV + Coil 111.78 93 54.08 45.58 3450 851 818 873 908
LF RF ERV + EH 138.26 93 62.09 45.29 3700 852 809 993 1046
ERV + GH 138.26 93 64.72 44.38 3950 967 882 1003 1098
ERV + Coil + EH 170.00 93 75.54 45.25 4450 1015 962 1203 1270
ERV + Coil + GH 170.00 93 79.46 44.4 4650 1136 1038 1182 1294
ERV + Coil + ST 170.00 93 75.33 45.43 4500 1020 974 1224 1282
OPTIONS
RECIRC
VFD
UNIT50340
Add the additional weights for options to the Unit Weights to determine Unit and Corner weights for a specific unit.
DN-5-IN 1" CABINET UNIT WEIGHTS (LBS)
DN-5-IN
Center of Gravity "A" and "B" Dimensions +/- 2"
DN-5-IN 2" CABINET UNIT WEIGHTS (LBS)
Center of Gravity "A" and "B" Dimensions +/- 2"
ADDITIONAL WEIGHTS FOR OPTIONS (LBS)
DIMENSIONED DRAWINGS
DN-Series DOAS Indoor
DOAS DN-5 Approximate Corner Weights
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SHIPPING / RECEIVING
DN-Series DOAS Indoor
4.0 SHIPPING / RECEIVING / HANDLING
All DOAS units are palletized and then shipped by common carrier. It is the installer’s / customer’s responsibility to coordinate delivery and properly handle the shipment during unloading and storage. RenewAire also provides a model-specific manual for shipping, rigging, lifting and assembly that is also available online at www.renewaire.com.
4.1 UNIT WEIGHTS / DIMENSIONS
4.1.1 Unit Dimensions and Weight
Unit dimensions and weight: DOAS Model DN-2 with 1” thick walls: 126” L x 60.75” W x 71.875” H DOAS Model DN-2 with 2” thick walls: 128” L x 62.75” W x 73.875” H Typical unit weight with 1” thick walls: 1250 - 2425 pounds Typical unit weight with 2” thick walls: 1330 - 2545 pounds
DOAS Model DN-3 with 1” thick walls: 147.875” L x 90.125” W x 71.875” H DOAS Model DN-3 with 2” thick walls: 149.875” L x 92.125” W x 73.875” H Typical unit weight with 1” thick walls: 1600 - 3475 pounds Typical unit weight with 2” thick walls: 1725 - 3675 pounds
DOAS Model DN-5 with 1” thick walls: 174” L x 103.75” W x 88.875” H DOAS Model DN-5 with 2” thick walls: 176” L x 105.625” W x 90.875” H Typical unit weight with 1” thick walls: 2600 - 4850 pounds Typical unit weight with 2” thick walls: 2725 - 5050 pounds
4.1.2 Shipping Dimensions and Weight
DOAS Model DN-2 with 1” thick walls: 140” L x 90” W x 77” H DOAS Model DN-2 with 2” thick walls: 140” L x 90” W x 77” H Typical shipping weight with 1” thick walls: 1450 - 2625 pounds Typical shipping weight with 2” thick walls: 1550 - 2750 pounds
DOAS Model DN-3 with 1” thick walls: 160” L x 90” W x 77” H DOAS Model DN-3 with 2” thick walls: 160” L x 90” W x 77” H Typical shipping weight with 1” thick walls: 1825 - 3700 pounds Typical shipping weight with 2” thick walls: 1950 - 3900 pounds
DOAS Model DN-5 with 1” thick walls: 180” L x 101.5” W x 94” H DOAS Model DN-5 with 2” thick walls: 180” L x 101.5” W x 94” H Typical shipping weight with 1” thick walls: 2850 - 5100 pounds Typical shipping weight with 2” thick walls: 2975 - 5300 pounds
DN-Series DOAS Indoor
4.2 RECEIVING
Upon delivery of the DOAS, inspect it carefully for shipping damage and completeness. Verify the presence of any accessories that are to be field-installed or filters that are shipped loose. If shipping damage is discovered, take digital pictures and note the visible damage on the shipping manifest. Notify your RenewAire dealer immediately.
4.3 RIGGING
For rigging instructions, refer to the model-specific manual for shipping, rigging, lifting and assembly that is also available online at www.renewaire.com.
4.4 HANDLING AND STORAGE
Upon delivery to a job site, the DOAS should ideally be placed and installed immediately. If the unit cannot be installed immediately, it should be protected from the weather, either by moving it indoors or by covering with tarps. When placing the DOAS on the ground, the placement area should be flat and level. Take care to avoid twisting or wracking of the unit.
5.0 UNIT PLACEMENT
5.1 SOUND ATTENUATION OUTSIDE THE BUILDING
UNIT PLACEMENT
The exhaust hood is the primary source of noise outside the building. When practical, orient the exhaust air hood to point away from houses or public areas.
5.2 PLACEMENT CAUTIONS
Air handlers are typically placed in a location specified by others. There are a number of situations that may demand relocation:
• The outside air intake must be at least 10’ away from exhausts such as dryer vents, chimneys, furnace and water heater exhausts or other sources of contamination or carbon monoxide.
• Do not locate outside air intake where vehicles may be serviced or left idling.
• Never locate the outside air inlet inside a structure.
• Do not install the unit inside a garage or parking structure.
NOTICE
This DOAS must be installed in compliance with SMACNA guidelines and all applicable local building codes.
5.3 SERVICE CLEARANCES
See Section 3.0 Unit Drawings for required service clearances.
31 1.800.627.4499 INSTALLATION, OPERATION AND MAINTENANCE MANUAL RENEWAIRE.COM
UNIT PLACEMENT
DN-Series DOAS Indoor
6.0 INSTALL ATION
6.1 CURB ASSEMBLY AND PLACEMENT
Curbs are not normally required or used for indoor installations of the RenewAire DOAS.
6.2 UNIT PLACEMENT
DOAS location is normally specified by others but installers must also verify that the installation is in accordance with all local codes and building regulations.
Place the DOAS in its final location and level it by installing shims under the unit base. Shims should be placed at all four corners of the unit and not more than four feet apart on the sides and ends. Shims should be made of galvanized sheet metal.
Ducts inside a building that are connected to the
outside must be insulated with a sealed vapor barrier on both the inside and the outside of the insulation.
The DOAS must be within 1/8” of level in any four-foot distance.
6.3 HOOD INSTALLATION
Hoods are not normally required or used for indoor installations of the RenewAire DOAS.
6.4 DUCT CONNECTIONS
All ductwork is field-supplied and installed. If ducts are to be attached to factory-installed dampers, the dampers have an integral flange for anchoring the duct(s). See images below. Ducts may be fastened to the duct flange on the damper(s) or they may be oversized for direct attachment to the DOAS cabinet.
All RA and SA openings have duct flanges for connection to ductwork.
Class I Damper (typ) Duct Flange on Damper (typ)
6.4.1 Indoor Sound Attenuation
Duct stiffness:
Make sure the ductwork at the unit outlets is stiff enough to resist the flexing and resulting booming noise associated with system start-up and shutdown, as well as the turbulent flow conditions at the blower outlets.
In general, provide smooth transitions from the DOAS outlets to the duct. The ducts connecting to the outlets should be straight for a sufficient distance , with gradual transitions to the final duct size. These guidelines are consistent with SMACNA recommended duct layout practices for efficient and quiet air movement.
Radiated noise:
The outlet ducts can be significant sources of radiated sound, as well. The SA duct should be insulated for sound control. This insulation should start at the unit. At a minimum, the first ten feet of duct should be insulated. All parts of the SA and RA ducts located in a mechanical space with noise-generating equipment should also be insulated for sound control, both to minimize sound radiation out of the SA and RA ducts and also to control sound radiation into both ducts.
DN-Series DOAS Indoor
6.5 GAS REQUIREMENTS (IF EQUIPPED WITH A GAS HEAT MODULE)
Gas requirements are detailed in the RenewAire Integral Indirect Gas-Fired Heat Module User Manual.
6.5.1 Factory-Recommended Gas Service Entry
All DOAS units that are equipped with an indirect-fired gas furnace are to have gas supply connected in accordance with instructions with RenewAire Indirect Gas-Fired Heat Module User Manual supplied with this unit.
6.6 ELECTRICAL REQUIREMENTS
Unit ampacity requirements are found on the unit label. It is the installer’s responsibility to provide all supply wiring in accordance with local codes and installation in accordance with Industry Best Practices.
6.6.1 High Voltage Electrical Connections
ELECTRICAL CONNECTIONS
WARNING
ARC FLASH AND ELECTRIC SHOCK HAZARD
Arc flash and electric shock hazard. Disconnect all electric power supplies, verify with a voltmeter that electric power is off and wear protective equipment per NFPA 70E before working within electric control enclosure. Failure to comply can cause serious injury or death. Customer must provide earth ground to unit, per NEC, CEC and local codes, as applicable. Before proceeding with installation, read all instructions, verifying that all the parts are included and check the nameplate to be sure the voltage matches available utility power. The line side of the disconnect switch contains live high-voltage. The only way to ensure that there is NO voltage inside the unit is to install and open a remote disconnect switch and verify that power is off with a volt meter. Refer to unit electrical schematic.
Follow all local codes.
6.6.2 Factory-Recommended Electric Service Entry
The left end of the DOAS cabinet has two factory-provided sleeved entry openings for high-voltage supply power and low-voltage control wiring. Wiring must be secured within the unit as needed, and according to all local codes.
Sleeved Entry Openings for
High Voltage Power and Low
Voltage Control Wiring
Factory-Provided Electric Service Entry
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ELECTRICAL CONNECTIONS
Every DOAS has
an electrical junc-
tion box, common-
ly referred to as an
“E-Box”. Each E-Box is divided into a high voltage side and a low voltage side.
DN-Series DOAS Indoor
6.6.3 High Voltage Supply Circuits
This DOAS uses a single-point high voltage electrical supply connection. All wires are to be terminated at the same point on the top of the disconnect switch. See photo below. Depending on the ampacity of the unit, different disconnect switches may be used, but high voltage supply wiring is always terminated at the top of the disconnect switch.
Terminate High Voltage Supply
On Top of Disconnect Switch
Disconnect Switch (typ)
The left of the E-Box has a set of knockouts for installation of high voltage wiring. High voltage wiring is to go through the side of the E-box and be terminated on the terminals located on the top of the disconnect switch.
All electrical wiring installed by others in the field is to be secured as needed and according to all local codes and in accordance with Industry Best Practices.
DN-Series DOAS Indoor
6.6.4 Low Voltage Electrical Connections
6.6.5 Low Voltage Terminal Blocks
There are six low voltage terminal blocks located in the E-Box; 4 gray, 1 white and 1 black. Only the gray terminal block labeled with numbers 31 - 40 is used to terminate optional control sensors.
Low Voltage
Terminal Blocks
ELECTRICAL CONNECTIONS
Low Voltage Terminal Blocks Installed
6.6.6 Low Voltage Terminal Blocks Layout
24 VAC Bus
Terminal Block
Electrical Common Bus
Terminal Block
Low Voltage Terminal Blocks Layout
1-10 Factory-Assigned
WiringTerminal Block
11-20 Factory-Assigned Wiring
Terminal Block
31 - 40 Field Wiring
Terminal Block
21-30 Factory-Assigned Wiring
Terminal Block
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PIPING CONNECTIONS
DN-Series DOAS Indoor
6.7 PIPING CONNECTIONS
6.7.1 Coil Connections
Piping connections to DOAS coils may be water coil (either heating or cooling), steam coil or refrigerant for a DX cooling coil or a HGRH coil
Fluid coils are located in the coil module which may be either upstream or downstream of the SA fan module. Coils are always positioned vertically and the inlets and outlets are stubbed through the fixed portion of the access panel. Fluid coils must typically be flushed at time of connection to an external water source. Fluid coils are dry when shipped, with connections capped.
Optional DX coils are installed in the coil module which may be either upstream or downstream of the SA fan. DX coils are filled with nitrogen and are to be purged prior to connection to a field-supplied, external refrigerant source.
IMPORTANT
Do not release refrigerant into the atmosphere! If required service procedures include the adding or removal of refrigerant, the service technician must comply with all federal, state and local laws. The procedures discussed in this manual should only be performed by a qualified, EPA Certified technician.
6.7.2 Gas Heater Connections
Gas connections to the optional indirect gas-fired heater module should be as shown in the Re­newAire Integral Indirect Gas-Fired Heat Module User Manual.
DN-Series DOAS Indoor
6.7.3 Drain Traps
Condensate drains may be found on integral gas-fired furnaces or as part of a condensate drain pan assembly in a cooling section of the DOAS. All condensate drains must be trapped. Depending on the configuration of the unit as ordered, there may be condensate drains for DX coils, chilled water coils and gas heat modules. DX coils and chilled water coils are installed above condensate drain pans and the drains from those pans must be trapped and, if necessary, winterized. If a gas heat module is installed, the condensate discharge tube from the module must also be trapped and winterized, as needed.
Cooling module drain pans have a sloped bottom and an integral drain fitting at the low end. The drain fitting is 1” diameter stainless steel with female NPT. The image below shows the underside of the drain fitting.
For specific information on trapping a gas furnace condensate drain, see the RenewAire Integral Indirect Gas-Fired Heat Module User Manual.
For instructions on designing both positive and negative pressure drain traps, see Section 6.7.4 Drain
Trap Construction in this manual.
PIPING CONNECTIONS
Gas Heat
Condensate Tube
DX Coil Condensate Pan
(accessible from beneath
unit)
Condensate Drain Locations (typ)
Drain Pan Connection
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PIPING CONNECTIONS
DN-Series DOAS Indoor
When the SA fan module is located upstream of the cooling module, the resulting pressure sensed at the condensate pan will be POSITIVE. See below.
Coil Module
SA Fan Module
SA fan module located before the coil
module.
When the SA fan module is located downstream of the cooling module, the resulting pressure sensed at the condensate pan will be NEGATIVE. See below.
SA Fan Module
Cooling Module
SA fan module located after the coil module.
Condensate drain trap clearances
The unit base has an access port for the condensate drain pipe, centered vertically. The access port is 3” tall and the condensate drain pipe must exit the unit through it.
A
A
6.89 Bottom of drain pan to bottom of base
5.20
DETAIL B
SCALE 1 : 6
B
SECTION A-A
Bottom of drain pan connection to bottom of base
DN-Series DOAS Indoor
Unit Drain Pipe
Threaded Plugs (for cleanout)
Coupling (Threaded Socket)
Nipple
Cross
Sloped Drain Pipe
Nipples
Bend
Tee
Vacuum Breaker
6.7.4 Drain Trap Construction
Drain traps should be constructed in accordance with local building codes, using Industry Best Practices. Drain traps are essential to allow water to flow out of the drain pan(s). More important, though, when there is negative internal static within the unit, the trap prevents outdoor air from being pulled into the unit and consequently splashing water inside the unit. Drain trap design is dependent on the static pressure at the drain location and also whether the pressure is negative or positive. For all drain traps, RenewAire recommends the installation of threaded plugs at several locations to permit periodic cleaning and filling of the trap. Also recommended is the use of a vacuum breaker if water is being discharged from the trap into a drain pipe. The vacuum breaker can be omitted if the condensate is being drained directly onto the ground. See illustration below.
Note Locations of Recommended Clean-Out Ports
PIPING CONNECTIONS
Typical Drain Trap Construction
In order to properly design drain traps, certain information must be obtained. First, carefully check the drawings to find the number and locations of all drain traps. Also from the drawings, determine if the drain traps will be positive or negative pressure.
If a positive pressure trap is needed, fabricate the trap as shown in the drawing below.
Unit Water Drain Pipe
Drain Pan
Provide a minimum 1/2” drop
Unit at Rest (fan turned off)
H
Dimension “H” equals the positive pressure in inches of water column
PLUS a minimum of 1/2 inch
Positive Pressure Drain Trap Construction
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PIPING CONNECTIONS
DN-Series DOAS Indoor
When fabricating a positive pressure drain trap, dimension “H” equals the Total Static Pressure in inches of water column plus a minimum of 1/2 inch. Be sure that the offset distance between the height of the condensate inlet and the condensate outlet is at least 1/2 inch.
If a negative pressure trap is needed, fabricate the trap as shown in the following drawing.
Unit Condensate
Condensate Drain Pan
Dimension “H” equals the negative pressure in inches of water column
Discharge Pipe
Unit at Rest (fan turned off)
H
H / 2 (one-half of dimension “H”)
PLUS a minimum of one inch
Negative Pressure Drain Trap Construction
When fabricating a negative pressure drain trap, dimension “H” equals the Total Static Pressure in inches of water column plus a minimum of one inch. The outlet side of the drain trap should have a water column equal to one-half of dimension “H”.
Specific materials and fittings are to be used as local conditions dictate. Since the trap is to be kept filled with either water or glycol solution at all times, it may be necessary to fabricate the trap from metal so that an electric heat tape can be installed to prevent freezing.
Condensate may be drained directly onto the ground only if local codes permit it. If allowed to drain directly, a pad must be provided for the condensate to drip onto.
6.7.5 Waterless Drain Traps
As an alternative to a field-fabricated and installed condensate P-trap, RenewAire offers an HVAC waterless trap. The advantages to a waterless trap are that they may require less vertical clearance for (negative pressure) installations, they generally do not require winterization and they do not require priming at the beginning of the cooling season.
Two different models are offered, both the N-type for negative pressure applications and the P-type for positive pressure applications. Both models are rated for a maximum of 12 In. W.C.. All waterless traps have a cleanout port for annual maintenance. RenewAire recommends that waterless traps be installed with a screen union kit to permit removal of the trap for maintenance, which consists of back-flushing with water or compressed air. RenewAire also recommends installation of a condensate pan overflow switch to shut down the DOAS if the condensate level should rise to unacceptable levels.
Type “P” waterless traps are typically installed vertically and require a 1” sweep on both the top and bottom. If screen-unions are used (recommended), that will increase the overall height clearance of the device slightly.
Type “P” Positive Pressure Waterless Trap
PIPING CONNECTIONS
DN-Series DOAS Indoor
8”
Allow clearance for 1” sweep at top and bottom of the trap. Also allow vertical clearance for a screen-union, if used. Follow manufacturer’s instructions for installation.
5 - 5/8”
Type “N” traps are installed horizontally with the cleanout port UP. Follow manufacturer’s instructions for installation.
Type “N” Negative Pressure Waterless Trap
Clearance
required
Maximum
positive
pressure
DN-2
DN-3
DN-5
3 - 5 In. W.C.
3 - 5 In. W.C.
3 - 5 In. W.C.
Maximum pressure is the In. W.C. detected at the condensate drain outlet. This pressure
may vary, depending on factors such as back pressure from the SA ductwork and the
size / speed of the fans that are ordered.
Maximum
negative pressure
3 - 5 In. W.C.
3 - 5 In. W.C.
3 - 5 In. W.C.
for positive
pressure
P-trap
4.75”
4.75”
4.75”
Clearance
required
for negative
pressure
P-trap
7.75”
7.75”
7.75”
Clearance
required for
positive
pressure
waterless trap
8.25”
8.25”
8.25”
Clearance
required for
negative pressure
waterless trap
4.25”
4.25”
4.25”
Clearance is the distance to be allowed BELOW the bottom of the DOAS base. This
clearance represents typical P-trap construction based on provided guidelines or
waterless trap construction, based on the manufacturer’s instructions.
41 1.800.627.4499 INSTALLATION, OPERATION AND MAINTENANCE MANUAL RENEWAIRE.COM
WIRING SCHEMATICS
CHANGESNAMEREV. DATE
SCHEME
Power
New0 4/17/2018 austine
1
DN-2-Jxxxxx15--xGxExx--xx_000
Input Power
230 VAC, 1 Phase
This wiring schematic
is TYPICAL of single
phase, 230 VAC
input for model DN-
2. This drawing is for a unit that includes gas heat and EC motors. A unit-specific electrical schematic is to be found inside the access door to the unit control module. Also see additional wiring schematics on following pages for TYPICAL control wiring and TYPICAL field wiring.
DN-Series DOAS Indoor
6.8 WIRING SCHEMATICS
6.8.1 Typical Input Power
02-6-D
02-6-D
EF ECM\Red
12
X2
EF ECM\Wht
02-6-D
16
X214X2
SF ECM Enable\Blk
SF ECM Enable\Red
SF ECM Command\Red
02-5-A
02-9-A
02-8-C
F1
2.5A
21
X3
20
X2
37
X4
36
X4
1
X1
39
X4
38
X4
6
X1
4
X1
2
X1
ACOM
5
5
4
GND
+24V
0-10 V
Enable
EF
ECM1
L(L+)
N(L-)
GND
4
GND
+24V
0-10 V
Enable
SF
ECM2
L(L+)
N(L-)
GND
Transformer
COM
Accy 24 VAC
Transformer
Accy COM
COM
Gas Module
N
L1
F4
L1L2L3
GND
DN-2 Single Phase Power Wiring Schematic
CHANGESNAMEREV. DATE
SCHEME
Power
New0 1/19/2018 austine
1
DN-2,3-Jxxxxx33,34,35--xGxExx--xx_000
02-6-D
208-230 VAC, 3 Phase
460 VAC, 3 Phase
ACOM
02-6-D
EF ECM\Red
12
X2
EF ECM\Wht
02-6-D
14
X216X2
SF ECM Enable\Blk
SF ECM Enable\Red
SF ECM Command\Red
WIRING SCHEMATICS
DN-Series DOAS Indoor
This wiring schematic
H3
H2
X3
X2
Gas Module
N
L1
H4
750VA
X4
H1
X1
02-5-A
02-9-A
02-8-C
39
X4
38
F1
2.5A
21
X3
20
X2
X4
6
X1
4
37
X1
X4
36
2
X4
X1
1
X1
is TYPICAL of three phase, 208-230 and
460 VAC input for models DN-2 and DN-3. This drawing is for a unit that includes gas heat and EC motors. A unit-specific electrical schematic is to be found inside the access door to the unit control module. Also see additional wiring schematics on following pages for TYPICAL control wiring and TYPICAL field wiring.
Accy COM
COM
Accy 24 VAC
Transformer
COM
F2
H3
H2
H1
X1
H4
750VA
X4
X2
X3
5
10
0-10 V
L2
+24V
L3/N
11
Enable
GND
Transformer
10
11
5
4
GND
+24V
0-10 V
EF
ECM1
L1
Enable
L3/N
L2
GND
4
GND
SF
ECM2
L1
F3
F1
L3
L2
L1
GND
Input Power
DN-2, DN-3 Three Phase Power Wiring Schematic
43 1.800.627.4499 INSTALLATION, OPERATION AND MAINTENANCE MANUAL RENEWAIRE.COM
WIRING SCHEMATICS
CHANGESNAMEREV. DATE
SCHEME
Power
New0 4/17/2018 austine
1
DN-5-Jxxxxx33,34,35--xGxExx--xx_000
Input Power
208-230 VAC, 3 Phase
460 VAC, 3 Phase
ECM1
This wiring schematic is TYPICAL of three phase, 208-230 and
460 VAC input for model DN-5. This drawing is for a uniN-t that includes gas heat and EC motors. A unit­specific electrical schematic is to be found inside the access door to the unit control module. Also see additional wiring schematics on following pages for TYPICAL control wiring and TYPICAL field wiring.
DN-Series DOAS Indoor
02-6-D
02-6-D
EF ECM\Red
12
X2
EF ECM\Wht
02-6-D
14
X216X2
SF ECM Enable\Red
SF ECM Command\Red
SF ECM Enable\Blk
H3
H2
H1
X1
02-5-A
02-9-A
02-8-C
39
X4
38
F1
2.5A
21
X3
20
X2
X4
6
X1
4
37
X1
X4
36
2
X4
X1
1
X1
H4
750VA
X4
X2
X3
Gas Module
N
L1
ACOM
5
10
11
Enable
GND
4
GND
T1
ECM2
L1
4
GND
+24V
0-10 V
EF
L1
L2
L3/N
EF ECM\Red
5
10
0-10 V
L2
+24V
L3/N
EF ECM\Wht
11
Enable
GND
5
10
GND
L1
0-10 V
L2
+24V
L3/N
11
Enable
GND
4
GND
SF
ECM2
L1
4
SF
ECM1
SF ECM Enable\Red
SF ECM Command\Red
5
10
11
+24V
0-10 V
Enable
L2
L3/N
GND
Transformer
COM
Accy 24 VAC
Transformer
Accy COM
COM
F2
H3
H2
H1
X1
H4
750VA
X4
X2
X3
F1
F3
L3
L2
L1
GND
DN-5 Three Phase Power Wiring Schematic
6.8.2 Typical Control Wiring
CHANGESNAMEREV. DATE
SCHEME
Control
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DN-2,3-Jxxxxx33,34,35--xGxExx--xx_000
24 VAC Hot
01-9-D
WIRING SCHEMATICS
DN-Series DOAS Indoor
Not Used
PS1
GND
V bat
CAN L
CAN H
N3
Carel
C.pCO Mini
SA Fan 20"\Wht
Vin Vout
GND
J7 1
J7 2
J7 3
J7 4
J7 5
J7 6
GND
V bat
+V dc
+5VREF
C6
GND
GND
NO6
NC6
+V dc
+5VREF
This wiring schematic is TYPICAL control wiring for a three phase, 208-230 and
High End (Ethernet)
Expansion ModuleN4Carel
C.pCO E
460 VAC input for models DN-2, DN-3 and DN-5. This drawing is for a unit that includes gas heat and EC motors. A unit-specific electrical schematic is to be found inside the access door
N4
Carel
C.pCO E
Expansion Module
to the unit control module. Also see additional wiring schematics on following
GG0U1U2GND
J6 Tx/Rx-
J6 Tx/Rx+
15
3
01-2-D
01-6-D
01-4-D
X17X213X211X2
X15X1
23
C6
Accy 24 VAC
01-10-D
22
X3
EXP U3/4/5\Red
U3U4U5
EXP U3/4/5\Blk
EXP U3/4/5\Wht
ACOM
Mini NO1/2/C\Red
EF ECM\Red
SF ECM Command\Red
Y1
Y2
NO1
GND
GND
Ethernet
High End (Ethernet)N3Carel
C.pCO Mini
Mini NO1/2/C\Blk
TX/RX\Red
TX/RX\Blk
EA Fan 20"\Wht
Vin Vout
GND
PS4
SA Fan Press
GND
+Vterm
J4 Tx/Rx-
J4 Tx/Rx+
J3 Tx/Rx -
J3 Tx/Rx +
EA Fan Press
Mini NO1/2/C\Wht
Mini NO3/4/5\Red
NO2
NO3
C1/2
C3/4/5
Mini NO3/4/5\Wht
Mini NO3/4/5\Blk
NO4
C3/4/5
NC6
NO5
NO6
EXP U8/9/10\Red
EXP U6/GND/U7\Red
EXP U6/GND/U7\Wht
U7U8U9
U6
GND
30
31
X329X328X326X327X325X324X3
X4
EXP U8/9/10\Blk
EXP U8/9/10\Wht
U10
X110X19X18X3
X432X433X4
EXP NO3/4\Red
EXP NO1/2/C\Red
EXP NO1/2/C\Blk
EXP NO1/2/C\Wht
GND
NO3
NO1
NO2
C1/2
C3/4/5
34
35
X4
EXP NO3/4\Blk
EXP NO5/C345\Blk
EXP NO5/C345\Red
NO4
NO5
C3/4/5
page for TYPICAL field wiring.
OA Temp\Red
TOT
+
TH1
-
OA Humid\Wht
TOT
+
OA Temp & Hum
TH2
TS1
RA Temp\Red
-
GG0U1U2U3
RA Humid\Wht
NTC2
RA Temp & Hum
N3
Carel
C.pCO Mini
High End (Ethernet)
SA Temp
G
GNDU4U5U6GNDU7U8U9U10
or White
or White
RA 2" Filter\Wht
OA 2" Filter\Wht
EA Temp\Red
SA Temp\Red
NTC1
EA Temp
01-8-D
GND
ID1
ID2
EF Current\Red
SF Current\Red
Vin Vout
GND
PS2
GND
OA Filter Press
TS2
PS3
X218X219X2
Vin Vout
N4
Carel
17
ID1/2/GND\Red
ID1/2/GND\Wht
GND
RA Filter Press
C.pCO E
CS1
Expansion Module
SF Current\Red
SF Current Switch
G0
Common
EF Current\Red
CS2
EF Current Switch
DN-2, DN-3, DN-5 Typical Control Wiring
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WIRING SCHEMATICS
CHANGESNAM EREV. DATE
SCHEME
Field Wiring
New0 1/19/2018 austine
3
DN-2,3-Jxxxxx33,34,35--xGxExx--xx_000
This wiring schematic
is TYPICAL of three
phase, 208-230 and
460 VAC input for models DN-2, DN-3 and DN-
5. This drawing is for a unit that includes gas heat and EC motors. A unit-specific electrical schematic is to be found inside the access door to the unit control module.
DN-Series DOAS Indoor
6.8.3 Typical Field Wiring
GRY
Vin
D4
Face/Bypass
COM
HOT
RED
BLK
For 5:1
T11(+)
T12(-)
Duct
Vin Vout
GND
Pressure Sensor
0 - 10 VDC Input, CO2 Level/VOC
0 - 10 VDC Output, Bypass Damper
0 - 10 VDC Input, Cooling Coil LAT
EXP U4
EA/RA
COM
DAMPER2
EXP U5
HOT
0 - 10 VDC Input, Duct Pressure
EXP U6
21
X322X323X324X325X326X327X328X329X3
X3
EXP U3
Sensor 24 VAC
OA/FA
DAMPER1
HOT
COM
10K Carel NTC
Unit Supply Temp
EXP U7
Recirc
DAMPER3
COM
EXP U8
Sensor COM
HOT
0 - 10 VDC Output, HGRH Modulation
0 - 10 VDC Output, Cooling Modulation
EXP U9
Gas Module
T1
T12 (+)
0 - 10 VDC Output, Heating Modulation
30
EXP U10
T2
For 10:1
Gas Module
T13 ( - )
Open = Heating, Closed = Cooling
Cooling Stage 1
Cooling Stage 2
X431X432X433X434X4
EXP NO 3
EXP NO 4
EXP NO 5
Sensor COM
35
EXP C3/4/5
02-2-B
36
OA Temp\Red
OA TEMP
Smoke Detector
SD2
External
Temp/Humidity Sensor
02-2-B
OA Humid\Wht
OA HUM
Sensor 24 VAC
Overflow Switch
OF1
TOT
+
-
X440X439X438X437X4
Accy COM
Sensor COM
Exh Fan Only Enable
EFEN2
BLK
RED
1
Accy COM
Accy 24 VAC
BLK
RED
X14X13X12X1
NO 4
Accy COM
RED
BLK
Factory Jumper - remove if damper end switch is used
Factory Jumper - remove if damper end switch is used
Heating Stage 2
8
6
5
X17X1
X1
X1
NO 5
NO 3
Accy COM
EXP C1/2
Heating Enable/Stage 1
9
X1
EXP NO 1
X110X212X2
EXP NO 2
11
NO 2
EF ECM Enable
Factory Jumper
Factory Jumper
13
NO 1
C1/2
24 VDC
SF ECM Enable
Unit Enable
Sensor COM
EF Only Enable
X220X219X218X217X216X215X214X2
Sensor 24 VAC
DN-2, DN-3, DN-5 Typical Field Wiring
DN-Series DOAS Indoor
6.9 CONTROL CONNECTIONS
Control wiring is to enter the E-Box at the front of the E-Box and is then terminated on the field wiring low voltage terminal strip. See Section 6.6.5 Low Voltage Terminal Blocks for further information.
7.0 CONTROL CONTRACTOR INFORMATION
Prior to connection and activation of any external controls, the DOAS is to be tested for correct oper­ation. Verify that all Pre Start-Up and Start-Up steps as described in Sections 8 and 9 of this manual have been completed.
7.1 24 VAC CLASS II POWER SUPPLY
This unit is equipped with 2 Class II 24 VAC power supply transformers (see image below). One transformer provides power for the electronic controller and the second transformer provides power for optional sensors.
A built-in circuit breaker on the 24 VAC transformer prevents damage to the transformer and other low voltage components in the event of a short-circuit or overload. The transformer itself is designed to fail safely in extreme cases.
CONTROL CONNECTIONS
Circuit Breaker
Reset Button
24 VAC Power Supply Transformer
Transformer Specifications:
Nominal output voltage under load: 24 VAC Typical output voltage at no load: 29 - 31 V Minimum contact rating for connected control device: 50 mA (1.2 VA) Circuit breaker trip point: 3.75 A
Limits of Class II Power Output:
Control devices drawing a total of 8 VA may be connected. More than one device may be connected. Observe the following wire guidelines:
Wire Gauge #22 #20 #18 #16 #14 #12 Circuit Length 100’ 150’ 250’ 400’ 700’ 1000’
Resetting the Circuit Breaker:
If the transformer is subjected to excessive load or a short circuit, the integral circuit breaker will trip.
Shut off the primary-side power to the unit and remove the excessive load or the short circuit. The circuit breaker can be reset about 15 seconds after it trips.
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CONTROL CONNECTIONS
DN-Series DOAS Indoor
7.2 POINTS LIST
The points list is to be found in the DOAS Integrated Programmable Controls manual.
CAUTION
RISK OF DAMAGE TO POWER SUPPLY AND CONNECTED COMPONENTS
UNITS WITH 230 VAC POWER SOURCE: The DOAS is shipped from the factory with the transformers set for 208 VAC primary power. If the actual power source is 230 VAC, move the black primary-side lead from the transformer’s “208 V” terminal to the transformer’s “230 V” terminal.
Connect only to components intended for use with a 24 VAC power supply.
Do not interconnect the unit’s Class II power supply with an external Class II power supply.
Do not use undersized low voltage wiring to connect this device. Observe the wire gauge / wire length chart on the previous page.
Do not overload the power supply.
Any external 24 VAC power supply connected to this device must be connected to the terminals as shown on the wiring schematics. Connect only Class II power to the terminals on this unit.
DN-Series DOAS Indoor
7.3 EXTERNAL CONTROL CONNECTIONS
External control wiring is to be terminated on the low voltage terminal strip in the E-Box as shown in the unit-specific wiring diagram to be found in the unit.
7.4 SEQUENCE OF OPERATION
Basic Sequence of Operation (SOO)
Operating sequences are different, depending on whether the unit is:
• Controlled for simultaneous blower operation or controlled for independent blower operation.
• Factory-provided with VFD control.
Simultaneous or Independent Blower Operation:
When set up for Simultaneous Blower Operation, both blowers should respond to a call for unit operation at the same time.
When set up for Independent blower operation, each blower will follow an independent operating sequence.
CONTROL CONNECTIONS
Dampers
The control sequence for that airstream’s blower is as follows:
• External control calls for operation and damper immediately starts to open.
• After about 30 seconds, damper is open fully and the damper actuator end switch closes.
• The damper actuator end switch completes a low-voltage circuit that turns on the appropriate blower.
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PRE START-UP
DN-Series DOAS Indoor
8.0 PRE START-UP
8.1 VERIFY VOLTAGES
Using a voltmeter, test the input voltages as supplied to the disconnect switch. Refer to Digit 13 of the unit Configuration Code to find the rated voltage. The supplied voltage must be within +/- 10% of the rated voltage.
8.2 VERIFY TRANSFORMER WIRING
Units with 230VAC power source are shipped with the transformer wired for 208VAC. If the unit is receiving 230VAC, make sure the black primary-side wire on the transformer’s 208V terminal has been moved to the 230V terminal.
8.3 INSPECT FILTERS
Filters must be installed prior to fan start-up. Filters must be clean and butted tightly against each other, allowing no air circulation around them.
8.7 INSPECT FANS
Prior to start-up, the fans should be rotated by hand to make sure that the impeller is not rubbing anywhere and that it turns freely.
8.8 INSPECT AND CLEAN THE INTERIOR
During the construction and installation phases of a project, dust, dirt and debris will often accumulate inside a unit. Thoroughly clean the inside of the unit by vacuuming and/or wiping with a damp rag.
8.9 INSPECT DUCTWORK CONNECTIONS
Ducts attached to the DOAS must be firmly attached, sealed and supported in accordance with installation instructions and SMACNA guidelines.
All dampers should be tested at start­up to verify that the dampers will open
fully. See the DOAS Quick-
Start Guide.
For information on programming and op­erating the Integrated
Commercial Controller, see the DOAS Integral Com­mercial Controls User Manual.
9.0 START-UP
9.1 VERIFY CORRECT FAN ROTATION DIRECTION
The first time power is applied to the fan motors, it should be just a brief pulse so that the fans will begin spinning. Verify that the fans are turning the correct direction. If a fan is turning the wrong direction, it will be because a three-phase power source has been improperly connected.
9.2 BASIC OPERATIONAL CHECK
PREPARE FOR TESTING
• Turn the Disconnect Switch on the face of the E-Box to the ON position. The controller will now boot-up.
• Using the controller Main Menu, switch the Unit Enable status to ON. The dampers will move to their assigned positions and then the fans will start running.
• Once the fans begin moving, verify they are turning the correct direction and then change the Unit Enable status to OFF.
9.2.1 Current Switches
Once correct rotation direction has been verified, re-set the current switches according to the instructions in Section 11.11 of this manual.
DN-Series DOAS Indoor
10.0 MAINTENANCE
RenewAire DOASs are built to operate with minimal maintenance. After unit commissioning, the primary areas of attention are the air filters.
10.1 MAINTENANCE 24 HRS. AFTER START-UP
24 hours after unit start-up:
• If unit has DX or cooling coils, inspect for water where it does not belong. Inspect the conden-
sate pan and trap to make sure condensate is draining properly.
• In new installations, check the air filters since they will often collect dust, dirt and debris at time
of start-up.
10.2 MAINTENANCE 30 DAYS AFTER START-UP
After 30 days of operation:
• Tighten all electrical connections,
• Check the air filters as part of the normal monthly maintenance.
10.3 MAINTENANCE SCHEDULE
Experience on the part of the service person is the most important issue in establishing a mainte­nance schedule. There will be times of the year when frequent inspection of the filters will be re­quired, such as spring and summer when there may be pollen, dust, dirt or debris from budding trees
and bushes that can clog the filters. Also see Section 12.0 Maintenance Records in this manual.
MAINTENANCE
10.4 FILTERS
Filter cleanliness and replacement is the most important and frequent maintenance issue. Dirty fil­ters will cause an immediate reduction in operating efficiency of the DOAS. Normally, filter condition should be checked frequently by checking pressure drop data on the integrated microprocessor controller. The controller constantly monitors air pressure within the unit and will provide an alarm when pressure drop across the filters exceeds a user-assigned setpoint. Paper filters are not to be cleaned, they are to be replaced. In general, if a filter looks dirty, replace it.
Table: Clean Filter Pressure Drop (in. w.g.)
Airflow (CFM)
2“ MERV 8
2” MERV 13
4” MERV 8
4” MERV 13
NOTE: Pressure drop of clean 2” MERV 8 filters is included in the Unit Performance Ratings Table
NOTE: Pressure drop data for MERV 14 filters is not available at the time this printing.
1500
0.03
0.04
0.01
0.02
2000
0.05
0.06
0.02
0.03
2500
0.06
0.08
0.03
0.04
3000
0.07
0.10
0.03
0.05
3500
0.09
0.12
0.04
0.07
4000
0.10
0.14
0.05
0.08
4500
0.11
0.16
0.07
0.10
5000
0.13
0.18
0.08
0.12
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MAINTENANCE
www.renewaire.com (800) 627- 4499 support@renewaire.com
DN-Series DOAS Indoor
10.5 SERVICE PARTS
DOAS Service Parts
DN-Series DOAS Indoor
11.0 MAINTENANCE REFERENCE
Maintenance of this unit has a split schedule. It is broken down into Monthly, Semi Annual and Annual tasks and the schedule must be adjusted for heating or cooling. If there is a cooling system in the unit, the annual maintenance for the cooling system should be scheduled for the start of the cooling season. If there is a heating system in the unit, the annual maintenance for the heating system should be scheduled for the start of the heating season. Maintenance needs for various components are described briefly on the following pages.
11.1 CABINET MAINTENANCE
Once each year the entire cabinet should be thoroughly inspected for dirt build-up, corrosion or scratches to the finish (whether galvanized or painted). If dirt build-up is found, it should be cleaned and the source corrected. If scratches or corrosion are found, the surface should be cleaned and a protective coating should be applied.
Annual inspection:
• Inspect all door seals to make sure they are still pliable and function properly. Replace any seals that are hardened, cracked or ineffective.
• Inspect doors for proper alignment and door handle tension. See Section 11.6 in this manual.
• Inspect all caulked joints to verify that caulking is in good repair. Any joint caulk that is cracked or ineffective should be removed and replaced with fresh caulking.
• Look for rust, corrosion or dirt build-up. If found, clean the area and apply a proper sealant. Correct the source of any dirt.
MAINTENANCE REFERENCE
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MAINTENANCE REFERENCE
DN-Series DOAS Indoor
11.2 ELECTRIC MOTOR MAINTENANCE
The most important issue in motor maintenance is motor cleanliness.
11.2.1 Motor Cleanliness
Removing dust and grease buildup on the motor housing assists proper cooling. Never wash-down the motor with high pressure spray.
11.2.2 VFDs (optional)
Power electronics have limited life and may exhibit changed characteristics or performance deterioration after years of use under normal conditions. Periodic inspection and maintenance of the drive unit is required.
Drives contain a variety of power electronics such as power transistors, semiconductors, capacitors, resistors, fans, and relays. The electronics in the drive serve a critical role in maintaining proper motor control. The VFD manual that was shipped with the unit has a maintenance and inspection schedule. Note: The drive will require more frequent inspection if it is placed in harsh environments, such as:
• High ambient temperatures
• Frequent starting and stopping
• Fluctuations in the AC supply or load
• Excessive vibrations or shock loading
• Poor storage conditions
Perform the first equipment inspection 3 months after installation.
Note that the cooling fan on a VFD has an expected life of 2 - 3 years while the main circuit capacitors have an expected life of 10 years.
Inspect all VFDs annually to verify that cooling fans are not blocked and are operating properly without causing overheating of either the VFD or the driven motor. VFDs have a Performance Life Monitor built in so that the owner can use the keypad on the VFD to check for expected remaining life.
DN-Series DOAS Indoor
11.3 ENTHALPIC CORE MAINTENANCE
The enthalpic core media is a fibrous material that must be kept clean at all times. As a minimum, cores should be cleaned once per year.
• DO NOT WASH OR ALLOW THE ENTHALPIC CORES TO GET WET.
• DO NOT EXPOSE THE ENTHALPIC CORES TO HIGH HEAT OR FLAMES.
• DO NOT DIRECT COMPRESSED AIR AT THE CORE MEDIA.
• DO NOT REMOVE THE ENTHALPIC CORES FROM THE DOAS UNLESS NECESSARY.
• USE CAUTION WHEN WORKING AROUND THE ENTHALPIC CORES. DO NOT DROP TOOLS OR OTHER OBJECTS ON THE CORES, DO NOT BUMP OR TWIST THE CORES.
To access enthalpic cores for cleaning, remove the air filters.
To clean enthalpic cores, all exposed surfaces must be vacuumed with an attachment having long, soft bristles. The greatest buildup of dirt and dust will normally be on the leading 1 - 2 inches of the inlet side (closest to the air filters).
CAUTION
RISK OF DAMAGE TO ENTHALPIC CORES
Whenever working within the DOAS cabinet, protect the enthalpic cores from accidental damage. The core media is subject to damage from dropped tools or other foreign objects.
11.3.1 Removal of Enthalpic Cores
Before removing enthalpic cores, switch the main disconnect to OFF. Open the door to the Energy Recovery Module and simply pull each core straight out of its guides.
MAINTENANCE REFERENCE
When cores are removed from the DOAS, they should
be immediately protected from accidental damage, water, high heat or flames.
End View of Core Support Assembly
11.3.2 Reinstallation of Enthalpic Cores
Many DOAS units use a combination of what are referred to as “full size” and “half size” cores. When a half size core is used, it is positioned next to the access door. Full size cores are located behind any half size core. Cores have foam gasketing on one end of each core. The core should be reinstalled so that the foam gasketing is toward the back of the DOAS and the core label is facing toward the front. See illustration above.
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MAINTENANCE REFERENCE
DN-Series DOAS Indoor
11.4 FAN / MOTOR REMOVAL
Each EC motor and fan are part of an assembly that is mounted on an air inlet cone. If a fan or EC fan motor should require servicing or replacement, the entire assembly should be removed from the DOAS. The assembly is bolted to the plenum wall with 8 bolts and the assembly rests on a ledge. See the Service Parts illustration on the preceding page. Also see photographs below.
Fan and Motor Assembly
Single Phase EC Motor Wiring Connections Three Phase EC Motor Wiring Connections
DN-Series DOAS Indoor
U
Gap between impeller and inlet cone (U)
∆p
Each asynchronous motor and fan are part of an assembly that is mounted on a sled. If a fan or fan motor should require servicing or replacement, the fan and motor should be unbolted from the sled in order to remove it from the DOAS. See the Service Parts illustration in Section 10.5 of this manual. Also see photographs below. When reinstalling the motor and fan, verify correct clearances from the fan to the inlet cone.
MAINTENANCE REFERENCE
CORRECT OVERLAP IS .14”
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MAINTENANCE REFERENCE
DN-Series DOAS Indoor
11.5 COILS
11.5.1 Coil Maintenance / Removal
Whenever using cleaning agents in­side a DOAS, thor-
oughly wash down the area with fresh water when finished. Make sure that all residue, including cleaning chemicals, has been removed from the unit.
CAUTION: Use
of glycol or
polypropylene in
ratios other than
originally specified will affect thermal exchange properties.
The primary maintenance issue with coils is “housekeeping”. Periodic inspection of all coils is needed to search for bent fins which will impede air flow and inspect for cleanliness which reduces the efficiency of the coil.
Coils must be cleaned to maintain maximum performance. Check coils once per year under normal operating conditions and if dirty, brush or vacuum clean. Soiled fins reduce the capacity of the coil, demand more energy from the fan and create an environment for odor and bacteria to grow and spread through the conditioned zone. Low pressure water spray may be used for cleaning the fins. In all cases, TEST THE SPRAY PRESSURE over a small corner of the coil to determine if the fins will withstand the spray pressure. Bent fins should be straightened as needed.
The RTFP coil uses round copper tubing with many thin aluminum plates that go from tube to tube. The aluminum plates can easily be bent and when that happens, the plates need to be straightened. Use a common “fin comb” to straighten the plates. If there is dirt build-up on the fins, the ability of the coil to transfer heat is greatly reduced. Dirt can be cleaned off by using a commercial cleaning agent and then hosing it down with fresh water.
For coils with fragile fins or high fin density, foaming chemical sprays and washes are available. Many coil cleaners use harsh chemicals, so they must be used with caution by qualified personnel only. Care must be taken not to damage the coils, including the fins, while cleaning. Caution: fin edges are sharp!
CAUTION
RISK OF INCIDENTAL DAMAGE TO DOAS COMPONENTS
Many cleaning agents that are commonly used on coils may be damaging to other components such as enthalpic core media. Use protective sheeting to prevent accidental spread of chemicals. Thoroughly wash down the area when finished.
If it becomes necessary to remove any water or DX coil from a DOAS, it will have to be pulled straight forward through the access door opening. Any DX coil that is in the coil compartment will have to be evacuated. All coil tubes that extend through the access door must be cut off to allow removal of the door. Coils rest on either a bracket or rails and each coil has a positioning bracket at the rear of each coil, holding it in place. There are also two retaining bolts at the front of each coil, positioned toward the front of the DOAS.
DN-Series DOAS Indoor
11.6 DOOR LATCH ADJUSTMENT
With age and use, the door gaskets may become compressed and no longer provide a complete seal against air leakage. The door latches can be easily adjusted by changing the position of the swing arm on the inside of the door. See photo below.
Door Latch Adjustment
MAINTENANCE REFERENCE
11.7 GAS HEAT MODULE MAINTENANCE
See the gas heat module maintenance requirements as shown in the Indirect Gas-Fired Heat Module User Manual.
11.8 ELECTRIC HEAT MODULE MAINTENANCE
See the electric heat module maintenance requirements as shown in the Integrated Electric Heater Module User Manual.
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MAINTENANCE REFERENCE
DN-Series DOAS Indoor
11.9 WATER TREATMENT MAINTENANCE
RenewAire does not make any recommendations regarding minimum water quality for user-supplied water in the DOAS coils. If the user is employing a water treatment system, observe the instructions provided with the specific treatment system.
11.10 CONDENSATE DRAIN MAINTENANCE
Every DOAS having either a chilled water coil or a DX coil will have a drain pan. A drain pan is a tray or pan inside the unit that is designed to collect condensation resulting from normal operation of cooling coils.
Drain traps are located outside the air handler and are connected to a drain pan. A drain trap gives a path for discharge of condensation but its primary function is to provide a water column that prevents outside air from being drawn into the unit.
Drain pans and drain traps are places that are subject to bacteria growth. Each month, drain pans and drain traps should be inspected and drain traps should be filled. Inspect both the traps and the pans for evidence of bacteria or algae. If there is any evidence, clean thoroughly and treat with an appropriate growth inhibitor. If evidence of algae or bacterial growth is found, inspect and treat weekly until the problem is solved.
At the start of each heating season, drain traps should be filled with a glycol solution and if there is an electric heater (heat tape) on the trap or drain trap discharge pipe, it should be tested to make sure it functions properly.
11.11 C URRENT SWI TCH ES
Current switches are typically installed on the low voltage side of the E-Box. They work by sensing current passing through one or more high voltage power lines that pass through the center of the switch module.
Each switch has two indicator LEDs, showing “trip off” or “trip on”. The switch functions as an alarm condition indicator for the unit controller. If the switch goes into alarm, the controller alarm will reset itself when the alarm condition is satisfied. The controller will not reset itself and will continue to show an alarm in the circuit or system being monitored. Current switches are to be field-adjusted when
the unit is under full load.
Current Switch (typical)
11.12 WINTERIZATION
Winterization normally applies to “wet” areas of an air handler that will be exposed to freezing temperatures. This includes any water-filled coils and/or water supply piping and water drains, such as from condensate pans and P-traps. Prior to the first hard frost of the year, all air handler components should be examined and a plan put in place to either remove all water from the device or else to protect water-laden components. It is the user’s responsibility to determine possible freezing risks and implement a plan to protect the unit from freeze damage.
DN-Series DOAS Indoor
11.13 DAMPER MAINTENANCE
IMPORTANT
Damper linkages are to be lubricated with a graphite lubricant that does not contain petroleum or silicone. Petroleum lubricants are known to cause build-up of dirt and grime, while silicone lubricants can cause contamination spread in facilities where finishing of products with laquers and paints is performed.
Dampers are to be inspected annually for correct operation. Make sure they open and close fully. Inspect the side linkages for excessive looseness and lubricate the linkages with graphite lubricant.
11.14 FAN MAINTENANCE
All DOAS units use 2 direct-drive plenum fans. Blow or wipe any accumulated dust off the blower wheel. Inspect the wheel for cracks or other damage. Observe the fans during operation, checking for vibration or noise. Rotate the impellers by hand, checking for any rubbing of the impeller against the inlet cone.
11.15 TROUBLESHOOTING
Any faults in the operation of the DOAS system are normally recorded by the Integrated Microprocessor Controller. The first step in troubleshooting is to view the Alarm screens. Press the Alarm button on the
face of the controller to see all current alarms and what function or component is causing the alarm. In some cases, the Alarm pre-set may need to be adjusted or an offset may need to be changed.
MAINTENANCE REFERENCE
Before making any changes to the controller programming, be certain to have an updated backup file so that current settings can be easily restored, if needed.
Problems with an air handler are sometimes strictly mechanical, in which a fan or damper or some other component simply stops working. Mechanical problems are easily traced to specific components by using the prompts provided by the Alarm function button on the face of the controller.
In other cases, problems may be caused by the air handler trying to overcome a pre-set or operating parameter that has been set by the user. In these cases, a simple adjustment of the pre-set or an offset may correct the Alarm condition.
11.16 Factory Assistance
In the unlikely event that you need assistance from the factory for a specific issue, make sure that you have the information called for in the Unit Records page in the Owner Information section of this manual. The person you speak with at the factory will need that information to properly identify the unit and the installed options.
To contact RenewAire Customer Service:
Call 800-627-4499
Email: RenewAireSupport@RenewAire.com
Remember that RenewAire Customer Service can only assist with the products sold by RenewAire, it cannot resolve engineering issues that result from air handling system design by others.
61 1.800.627.4499 INSTALLATION, OPERATION AND MAINTENANCE MANUAL RENEWAIRE.COM
MAINTENANCE REFERENCE
DN-Series DOAS Indoor
12.0 MAINTENANCE RECORDS
Also see the User Manuals for any included options such as a gas heater, DX cooling, etc.
AIR FILTER REPLACEMENT RECORD
FILTERS REPLACED DATE:
ENTHALPIC CORES CLEANING RECORD
CORES CLEANED DATE:
ELECTRIC HEAT OR GAS HEAT MODULE MAINTENANCE RECORD
MODULE MAINTENANCE DATE:
DX COIL MAINTENANCE RECORD
MAINTENANCE REFERENCE
DN-Series DOAS Indoor
COILS CLEANED DATE:
UNIT WINTERIZATION RECORD
WINTERIZATION DATE:
63 1.800.627.4499 INSTALLATION, OPERATION AND MAINTENANCE MANUAL RENEWAIRE.COM
ABOUT RENEWAIRE
(800) 627-4499
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MEXICO,
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USA
For over 30 years, RenewAire has been a pioneer in enhancing indoor air quality
(IAQ) in commercial and residential buildings of every size. This is achieved while
maximizing sustainability through our fifth-generation, static-plate, enthalpic-core
Energy Recovery Ventilators (ERVs) that optimize energy efficiency, lower capital
costs via load reduction and decrease operational expenses by minimizing equipment
needs, resulting in significant energy savings. Our ERVs are competitively priced,
simple to install, easy to use and maintain and have a quick payback. They also
enjoy the industry’s best warranty with the lowest claims due to long-term reliability
derived from innovative design practices, expert workmanship and Quick Response
Manufacturing (QRM).
As the pioneer of static-plate core technology in North America, RenewAire is the
largest ERV producer in the USA. We’re committed to sustainable manufacturing and
lessening our environmental footprint, and to that end our Waunakee, WI plant is 100%
powered by wind turbines. The facility is also one of the few buildings worldwide to be
LEED and Green Globes certified, as well as having achieved ENERGY STAR Building
status. In 2010, RenewAire joined the Soler & Palau (S&P) Ventilation Group in order
to provide direct access to the latest in energy-efficient air-moving technologies. For
more information, visit: renewaire.com
RENEWAIRE LLC COPYRIGHT © OCT 2018
133975-000 OCT2018
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