ORTECH ODD-ERV-80 Energy Recovery Ventilator Instruction Manual

Instruction Manual
ENERGY RECOVERY VENTILATOR
ODD-ERV-80 | ODD-ERV-120 | ODD-ERV-150

ODD-ERV-80 Energy Recovery Ventilator

WARNING
WARNING — THE INSTALLATION MUST BE CARRIED OUT BY A QUALIFIED ELECTRICIAN.

• Risk of property damage, injury or death. Installation, service, and maintenance must be performed by a qualified service technician
• 110 or 220 Volts may cause serious injury from electric shock. Disconnect electrical power before starting installation or servicing. Leave power disconnected until installation/service is completed
• The unit must be ceiling mounted. Please mount the unit with the access door facing down
• Sharp edges may cause serious injury from cuts. Use care when handling duct work
• Inhalation of toxic gases or fumes can be harmful. The fresh air intake must be mounted in a location removed from sources of dangerous toxic gases. All ducting must be separate from other household exhaust systems
• Insufficient combustion air may cause toxic conditions. The unit must not exhaust air from an enclosed room with combustion appliances
• Excess negative or positive pressure may cause health problems or structural damage. The airflow must be balanced after installation
• Dropping may cause personal injury or equipment damage. Handle with care and follow installation instruction

CAUTION
PLEASE READ INSTRUCTION BEFORE COMMENCING INSTALLATION AND RETAIN FOR FUTURE REFERENCES.
The installation must conform to all applicable codes. The fresh air duct from outside and to the house and the stale air duct from the unit to the outside must be fully insulated to prevent condensation from forming on the duct work

STRUCTURE AND OPERATING LOGIC

The unit has the following operating logic (Figure 1):
Warm stale air extracted from the indoor space is purified in the exhaust filter and is supplied to the heat recovery core before being exhausted to an outdoor space. Clean cold air from outside is purified through the supply filter and is supplied to the heat recovery core before being supplied to the indoor space.
Thermal energy of warm extracted air is transferred to the supplied fresh air before the fresh air is supplied to a room. The extract and intake air flows are fully separated during heat recovery which prevents any transfer of odors and pathogens to the supply air. Heat recovery minimizes thermal energy losses, energy demand and heating costs.
Both sensible thermal energy and latent moisture energy contained in the extract air are transferred in the unit heat recovery core to the cold intake air flow from outside to warm it up before supplying to the room.
ERVs: The graphene modified polymer membranes core of the unit operates as a moisture balancer in case of low outdoor humidity or as an air dryer in case of high outdoor air humidity. Due to high hydroscopic features of the heat and energy recovery core material the unit does not need condensate drainage. Application of the heat exchanger provides decreasing thermal energy losses and heating costs saving during cold season.
HRVs: The Aluminum heat recovery core of the unit operates as a temperature balancer in case of large temperature differences between indoor and outdoor. When the air streams flow through the core, condensation may accumulate, requiring a drain for extraction out of the unit.

1. Duct connecting collars
2.  Exhaust fan
3. Supply fan
4.  Energy exchanger core
5.  Airfilters
6. Connect i on box

OA – Outside Air
SA – Suppy Air
RA – Room Air
EA – Exhaust Air

ENERGY RECOVERY VENTILATOR

MECHANICAL INSTALLATION (CEILING MOUNT)

When moving the unit during or after unpacking, make sure to lift it by holding its hanger brackets. Do not exert any pressure on other parts, especially duct connecting collars. Please purchase the installation accessories before starting installation.
SELECTING INSTALLATION SITE
Select an installation site where the following conditions are fulfilled:

• Install in a place which has suffcient strength and stability. (Beams, ceiling and other locations capable of fully supporting the weight of the unit.)
  Insuffcient strength is dangerous. It may also cause vibration and unusual operating noise

•  Where nothing blocks air passage

• Where suffcient clearance for maintenance and service can be ensured

USE SUSPENSION BOLTS FOR INSTALLATION

•  Check whether the ceiling is strong enough to support the weight of the unit or not. If there is a risk, reinforce the ceiling before installing the unit
• The fasteners are not included in the delivery set and must be purchased separately.. While selecting appropriate fasteners consider the material of the mounting surface as well as the weight of the unit, refer to technical data. Fasteners selection and unit mounting should be done by service technicians
• To mount the unit to the ceiling use belts rigidly fixed to a horizontal surface or threaded rods and expansion anchors
•  The belt, threaded rods and expansion anchors are not included in the delivery set

To attain the best performance of the unit and to minimize turbulence-induced air pressure losses while mounting connect a straight air duct section on both sides of the unit.
Minimum straight air duct length:

• equal to 1 air duct diameter on intake side
• equal to 3 air duct diameters on outlet side

If the air ducts are not connected or the connected air ducts are too short, protect the unit parts from ingress of foreign objects by covering the spigots with a protecting grille or other protecting device with mesh width not more than 1/2’to prevent uncontrollable access to the fans.
Prior to commissioning of the unit make sure it contains no objects.

DUCT CONNECTION
Perform duct work by following instructions below Instruction Manual
ODD-ERV-80 | ODD-ERV-120 | ODD-ERV-150

• Do not connect the ducts as shown below

• To prevent air leakage, wind aluminum tape round the section after the duct connecting flange and the duct are connected
•  To prevent air leakage, install the opening of the indoor air intake as far as from the opening of the exhaust suction
• Use the duct applicable to the unit used
•  Install the two outdoor ducts with down slope (slope of 1/30 or more) to prevent entry of rain water. In cold climate, please provide insulation for both ducts to prevent dew formation. (Material : Glass wool of 1 in. thick) If the unit is going to be used in cold places where the outside temperature reaches 14°F or below, insulate the indoor ducts as well
•  If the level of temperature and humidity inside the ceiling is always high, install a ventilation equipment inside the ceiling
•  Insulate the duct and the wall electrically when a metal duct is to be penetrated through the metal lattice and wire lattice or metal lining of a wooden structure wall
• Using flexible or silent ducts can be effective in reducing the air discharge sound of the supply air to inside (SA). Select materials keeping in mind the fan speed and operating sound of the unit
•  Set the pitch between the exhaust air outlet (EA) and the outdoor air intake (OA) to at least 3 times the duct diameter
• Do not use a bent cap or a round hood as the outdoor hood if they might get rained on directly (We recommend using a deep hood.)

CONNECTION OF CONTROLS
Timer:
Use of a timer is recommended for exhausting frequently polluted indoor air areas. When the timer is activated, the unit runs on high speed for the amount of time specified on the timer.

High Speed Mode

The unit has a two-position speed switch. LOW or MED speed positions are used to set continuous operation mode and OFF is used to set the STANDBY mode. The external controls (timer) switch the ventilation unit to high-speed mode. The supply and exhaust  fan speeds can be individually adjusted.

Speed Setting

The control screen enables equal speed settings or synchronous speed correcting for the supply and exhaust fan (see ALL) . If the air resistance differential in the supply (SPL) and exhaust (EHT) air ducts is unequal, the speed of the supply and exhaust fan can be individually adjusted and saved in the controller memory (see SPL and EHT, respectively).
The controller circuit board has a digital indicator and , ,