Installation manual

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VHR 704

IMPORTANT - PLEASE READ THIS MANUAL

BEFORE INSTALLING UNIT

VHR 704

Heat Recovery Ventilator

VHR SERIES

Installation Manual

INSTALLATION, OPERATION AND MAINTENANCE MANUAL

CAUTION - Before installation, careful consideration must be given to how this system

will operate if connected to any other piece of mechanical equipment, i.e. a forced air furnace

or air handler, operating at a higher static. After installation, the compatibility of the two

pieces of equipment should be confirmed by measuring the airflow’s of the Heat Recovery or

Energy Recovery Ventilators.

It is always important to assess how the operation of any HRV/ERV may interact with vented

combustion equipment (i.e. Gas Furnaces, Oil Furnaces, Wood Stoves, etc.).

NEVER - install a ventilator in a situation where its normal operation, lack of operation or

partial failure may result in the backdrafting or improper functioning of vented combustion

equipment!!!

Your ventilation system should be installed in conformance with the appropriate provincial or state requirements

or in the absence of such requirements with the current edition of the National Building Code, and / or

ASHRAE’s “ Good Engineering Practices”.

Summary of content (16 pages)

PAGE 1
VHR 704 Heat Recovery Ventilator Installation Manual IMPORTANT - PLEASE READ THIS MANUAL BEFORE INSTALLING UNIT CAUTION - Before installation, careful consideration must be given to how this system will operate if connected to any other piece of mechanical equipment, i.e. a forced air furnace or air handler, operating at a higher static. After installation, the compatibility of the two pieces of equipment should be confirmed by measuring the airflow’s of the Heat Recovery or Energy Recovery Ventilators.
PAGE 2
The Best Limited Warranty in the Business • The heat recovery aluminum core has a limited lifetime warranty. • The motors found in all Fantech HRV’s require no lubrication, and are factory balanced to prevent vibration and promote silent operation. • The limited warranty covers normal use. It does not apply to any defects, malfunctions or failures as a result of improper installation, abuse, mishandling, misapplication, fortuitous occurrence or any other circumstances outside Fantech’s control.
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VHR 704 V = Vertical discharge H = Heat recovery R = Remote low voltage 704 = 70cfm, 4 port design SPECIFICATIONS CASE 24 gauge galvanized steel. Baked powder coated paint, grey. Cabinet fully insulated with 1" (25 mm) aluminum foilface high density polystyrene foam to prevent condensation and meet the requirements of the UL 94HF. Compact top port design HRV with easy-mount wall bracket. Brings a continuous supply of fresh air into a home while exhausting an equal amount of contaminated air.
PAGE 4
Dimensions & Airflow - All units feature three foot plug-in power cord with 3-prong plug. 22.50" (572mm) 10.20" (259mm) 21.50" (546mm) Stale Air Stale Air From Inside To Outside Fresh Air Fresh Air From Outside To Outside • Continuous ventilation mode of supply and exhaust airstreams • 10˝ (254mm) of clearance is recommended for removal of core 17.20" 15.60" (436mm) (396mm) Ventilation Performance EXT.
PAGE 5
INSTALLATION PRACTICAL TIPS • Install the unit close to the outside wall on which the supply and exhaust hoods will be mounted. • Have a nearby power supply 120 Volts, 60Hz. (power cord is 3 feet long) LOCATION The HRV must be located in a heated space where it will be possible to conveniently service the unit. Typically the HRV would be located in the mechanical room or an area close to the outside wall where the weatherhoods will be mounted.
PAGE 6
INSTALLING DUCTS GOING TO / FROM OUTSIDE PRACTICAL TIPS • Decide where your intake and exhaust hoods will be located.
PAGE 7
INSTALLING DUCTS TO / FROM INSIDE To maximize airflow in the ductwork system, all ducts should be kept short and have as few bends or elbows as possible. Forty-five degree are preferred to 90º elbows. Use “Y” tees instead of 90º elbows whenever possible. All duct joints must be fastened with screws or duct sealant and wrapped with a quality tape to prevent leakage. Aluminum foil duct tape is recommended.
PAGE 8
INSTALLATION EXAMPLES Fully Dedicated System (suggested for new construction) Stale air drawn from key areas of home (bathroom, kitchen, laundry) Fresh air supplied to main living areas NOTE* VHR 704 should be mounted with its duct connections on top or similar.
PAGE 9
INSTALLATION EXAMPLES (CONT'D) DIRECT CONNECTION of the SUPPLY AIR STREAM to the FURNACE COLD AIR RETURN (Stale air drawn from key areas of home) Partially Dedicated System Stale air drawn from key areas of home (bathroom) Fresh air supplied to main living areas via the forced air system. NOTES: 1.Furnace blower may be required to operate when HRV/ERV is on to provide good air distribution. 2.Weatherhood arrangement is for drawing purposes only. 3.
PAGE 10
AIR FLOW BALANCING * Fantech’s superior design and use of EBM motors results in a steep fan curve that usually does not require balancing. Commissioning the system after installation is recommended which include confirming the proper operation of the system and how it interacts with other components within the home. AIRFLOW STATION (GRID) METHOD B 1 For this flow measuring station, cut the duct and place the flow measuring station between each section of duct.
PAGE 11
MAINTENANCE CAUTION MAKE SURE UNIT IS UNPLUGGED BEFORE ATTEMPTING ANY MAINTENANCE WORK The following components should also be inspected regularly and well maintained. PRACTICAL TIPS Filters need to be checked regularly • To prevent electrical shock, check that the unit is unplugged before doing any repairs or maintenance. • A yearly inspection is recommended to ensure the efficiency and troublefree use of your system. Run through the system and verify the different operating modes.
PAGE 12
OPERATION A Heat Recovery Ventilator (HRV) is designed to bring fresh air into a building while exhausting an equal amount of stale air. During the winter months, the incoming cold fresh air is warmed by utilizing the heat recovered from the stale air before it is exhausted to the outdoors. During summer months when the indoor space is air conditioned, the HRV will help in cooling the incoming fresh air with the stale air that is being exhausted.
PAGE 13
OPERATION (CONT'D) OPTIONAL REMOTE CONTROLS PRACTICAL TIPS To avoid window condensation: • It is not necessary to change the humidity control every day. Monitor the average weekly temperature or experiment with various settings until you find a level that is comfortable for you. Adjust the control when needed. NOTE: A dehumidistat is ideal for use in energy efficient houses where indoor humidity (during the heating season) is higher than outdoor levels.
PAGE 14
TROUBLESHOOTING Problem Causes Solutions Air is too dry Dehumidistat control is set too low Increase the desired level of humidity. Change ventilation mode from continuous mode to standby. HRV out of balance Balance HRV Dehumidistat control is set too high Reduce the desired level of humidity. Combine this step with use of continuous exchange mode. Sudden change in temperature Wait until outside temperature stabilizes (winter). Heating will also improve situation.
PAGE 15
Custom defrost mode jumper selec tion 3 position mode selec tion swit ch U * Wiring diagram of complete unit inside of access panel - + Sensor 3 wires AirQuality Diagnostic LED IN COM CUR SW DEHUM + TIMER + EDF + - - - N.C. N.O.
PAGE 16
ELECTRICAL CONNECTIONS (CONT'D) ELECTRICAL CONNECTION TO A FURNACE Standard Furnace AccessoryInterlock Control Contact Standard Wiring THERMOSTAT TERMINALS PRACTICAL TIPS FOUR WIRE Caution: • Never connect a 120 volt AC circuit to the terminals of the Accessory Control Contacts. Only use the low voltage class 2 circuit of the furnace blower control.