Lifebreath 2500EFD User's Manual
Contents
1. gt SE JE 3 g 8 5 x a y a Q 2 E p 9 T 24 zi ul m m SUPPLY EXHAUST STN mM AN SIS SIS HIGH SS HIGH SS Mm 29 mM Mm lan Ny Ri R2 R3 R4 O O O NO NC NO NC NO NC NO NC Pp gt TIMER 7 2 1 com COM A 3 7 vi q b MA SNAP DISK O T5 ON OFF ON OFF E i E Es MAX MAX HIGH LOW 7 HGHLOW O 15A L1 L2 COMMON O COMMON 240 VAC 15 AMPS 24 VAC TI 109 07 97 2500 LADDER DIAGRAM 10 11 12 13 14 15 240 Volt L2 15A ON OFF T 912 HIGH LOW T T3 SNAP DISK SS 750 i TMI TM1 1 R2 1 E 1 1 R3 1 R4 4 R3 1 R3 1 Em Exhaust Motor R3 1 Supply Motor ale RCIAL LIFEB O Year Limited Warranty 15 Year Core Warr NUTECH BRANDS INC NUTECH warrants to the purchaser of the Commercial LIFEBREATH model and accessories referred to below to be free from manufacturing defects This Warranty is personal to NUTECH and is in effect from the date of the original pur chase for a period of two years save and except that a 15 YEAR WARRANTY is given to the LIFEBREATH core should it develop a condensation2. tr amp LIFESREAS E wm THE ULTIMATE AIR EXCHANGER OPERATION AND INSTALLATION MANUAL For Models 2500IFD 2500EFD 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 must be confirmed by measuring the airflow s of the Heat Recovery Ventilator HRV Energy Recovery Ventilator ERV by using the balancing procedure found in this manual It is always important to assess how the operation of any HRV ERV may interact with vented combustion equipment ie 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 TO BE COMPLETED BY CONTRACTOR AFTER INSTALLATION Installing Contractor Telephone Contact Serial Number Installation Date LEAVE FOR HOMEOWNER IS 0 NOTE Due to ongoing research and product development specifications 9001 d ratings and dimensions subject to change without notice REGISTERED TI 59 1203 Introduction These Heat Recovery Ventilators HRVs are designed for commer
3. A 12 16 24 12 38 4 A Ya 28 12 PT centre ib Y 19 2 Point Y Fresh Air Stale Air Return Supply lt 899 BOTTOM VIEW All units conform to CSA and UL standards PROJECT MECHANICAL CONTRACTOR T 519 457 1904 F 519 457 1676 nutech Q BRANDS INC 511 McCormick Blvd London Ontario N5W 4C8 Email nutech lifebreath com Website www lifebreath com 270 Regency Ridge Suite 210 Dayton Ohio 45459 T 937 439 6676 F 937 439 6685 9001 REGISTERED TI 91E a 1203 Performance AIRFLOWS Each Air Stream 1316 2800 4 HIGH SPEED 1175 2500 1034 2200 MEDIUM SPEED 893 1900 4 LOW SPEED 752 1600 611 1300 470 1000 329 700 188 400 AIRFLOW 1 5 47 100 25 50 75 100 125 150 175 200 225 250 275 300 325 350 375 400 425 450 475 500 525 550 0 1 0 2 0 3 0 4 05 0 6 0 7 08 0 9 1 0 1 1 1 2 1 3 1 4 15 1 6 1 7 1 8 1 9 2 0 2 1 22 EXTERNAL STATIC PRESSURE IN PASCALS in W C TEMPERATURE EFFECTIVENESS SI ES EFFECTIVENESS e S x 850 944 1800 2000 AIRFLOW IN L s CFM Options and Accessories 99 101 CRANK TIMER Mechanical timer to activate high speed 99 116 DEHUMIDISTAT VENTILATION CONTROL DVC Turns unit on off via slider switch and high low via bu
4. THAT ARE SET FORTH HEREIN AND SHALL NOT BE LIABLE FOR ANY INCIDENTAL SPECIAL OR CONSEQUENTIAL DAMAGES WITH RESPECT TO LIFEBREATH COVERED BY THIS WARRANTY NUTECH S COMPLETE LIABILITY AND THE OWNER S EXCLUSIVE REMEDY BEING LIMITED TO REPAIR OR REPLACEMENT ON THE TERMS STATED HEREIN ANY IMPLIED WARRANTIES INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTY OF MERCHANTABILITY AND OF FITNESS FOR ANY PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED NO PERSON IS AUTHORIZED TO CHANGE THE WARRANTY IN ANY WAY OR GRANT ANY OTHER WARRANTY UNLESS SUCH CHANGES ARE MADE IN WRITING AND SIGNED BY AN OFFICER OF NUTECH MODEL NO UNIT SERIAL NO INSTALLED BY DATE ae 511 McCormick Blvd 270 Regency Ridge Suite 210 London Ontario N5W 4C8 Dayton Ohio 45459 Q T 519 457 1904 T 937 439 6676 F 519 457 1676 F 937 439 6685 9001 BRANDS INC Email nutech lifebreath com Website www lifebreath com REGISTERED
5. The exhaust takeoff connection must be at least a meter from a directly connected HRV supply duct if both are connected to the same duct run NOTE See the INSTALLATION WARNING under The Integrated HVAC System on page 16 A damper located just prior to the HRV is required to balance the stale air exhausted with the fresh air supply entering the building Return air suction points should be located at the opposite side of the room to the fresh air inlet The inlets may be located in the ceiling or high on the walls and fitted with inlet grilles Many commercial activities produce air contaminants in the form of dusts fumes mists vapours and gases Contaminants should be controlled at the source so that they are not dispersed through the building nor allowed to increase to toxic concentration levels The heat recovery ventilator allows for economical opera tion of the HVAC system while effectively removing contaminants from the space In designing the exhaust portion of the system the exhaust grilles are placed so as to remove the contaminants while not allowing them to enter the breathing zone of the occupants For contaminants that are lighter than air grilles should be located high on the wall If contaminants are heavier than air a lower placement of the grilles will be required Information on a contaminants specific gravity and toxicity should be available from the chemical data sheets Fresh Air Supply System The fresh
6. air supply ductwork from the HRV may be directly connected to the return air duct of the forced air system When directly connected it is recommend ed that the air handler blower be in constant operation to move the fresh air about the building see Installation Warning under The Integrated HVAC System on page 16 Also it is advisable to include a short length of fabric flex duct or other non metallic connector in this hard ducted line in order to keep the HRV acoustically isolated and separately grounded electrically from the air handler This will avoid a possible shock hazard to service people if a short to ground develops in one of the devices It may be nec essary to install a separate fresh air supply ductwork system if the heating is other than forced air When installing an HRV the designer and installer should be aware of local codes that may require smoke detectors and or firestats in the HVAC or HRV ductwork Because an HRV is designed to bring fresh air into the building structures may require a supply voltage interrupt when smoke or flame sensors are triggered or central fire alarm system is activated Supply air grilles may be ceiling or high wall mounted Avoid locating incoming fresh air grilles that could cause a direct draft on the occupants as the incoming air may be below room temperature A reheat duct heater can be installed to improve occupant comfort Information on electric or hydronic heaters is available th
7. in a heated space where the surrounding air temperature does not fall below freezing point The exhaust air temperature must be above 60 F 16 C for proper defrost operation FRESH AIR FROM OUTSIDE FILTERS STALE AIR FROM INSIDE DRAIN PANS If the air temperature is too low the defrost time may need to be increased The unit must be mounted level horizontal to obtain proper drainage of water from the heat exchange cores and drip pans The warranty will be void if these conditions are not met Typically the HRV is positioned close to an outside wall or the roof to simplify the connections and keep the length of insulated ducting to a minimum A minimum clearance of 40 in 1 m on one side of the HRV is recommended to service the heat exchanger cores and the filters Mounting The 2500EFD is designed to be mounted on a roof curb When assembling the curb note position of cross members which provide duct support Note access through the roof will be required It is also important to ensure that the perimeter of the curb is insulated but the interior of the curb is not This allows heat from the building to prevent freezing of the drain lines and pans The 2500IFD should be hung by a threaded rod type assembly which provides a cradle for the unit see pg 11 Note that 2X4 s should sit under the unit to avoid damage to the lip of the cabinet The HRV may also be mounted on an equipment platform provided that the
8. outside optional remote controls not included obtain on off and lt 38 4 lt 38 4 gt high low functions DEFROST perd to 24 gt Factory set defrost time user adjustable ad Supply motor is shut off while exhaust air defrosts core WARRANTY STA 15 year warranty on heat exchanger and 2 years building on parts WEIGHT Exhaust from 700 Ibs building SHIPPING WEIGHT FRONT VIEW BACK VIEW 1100 lbs All units conform to CSA and UL standards 89 9 5 aa lt 24 gt 1 DATE PROJECT MECHANICAL CONTRACTOR 511 McCormick Blvd 270 Regency Ridge Suite 210 London Ontario N5W 4C8 Dayton Ohio 45459 Q T 519 457 1904 T 937 439 6676 9001 F 519 457 1676 F 937 439 6685 BRANDS INC Email nutech lifebreath com Website www lifebreath com REGISTERED TI 911 4 1203 THE ULTIMATE AIR EXCHANGER SPECIFICATIONS AIR FLOW 2100 cfm 985 L s at 1 0 wg ESP PERFORMANCE 70 effective at 2500 cfm 1172 L s CORE Modular aluminum sensible heat recovery core Plate to plate type Slides out of either side of cabinet for service MOTORS Two single shaft PSC 3 speed 208 230V 5 1 amps 1 ph 1hp BLOWERS Two direct drive centrifugal blowers one per air stream FILTERS Two 18 X 24 4 inch pleated filters in each air stream DUCT CONNECTIONS Four 24 X 16 610mm X 406mm to and from the building und
9. 0 x 0 5 1000 cfm 500 L s Refer to Pool Models Installation Manuals MAKE UP HEAT REQUIREMENT at 1200 CFM 566L s Nominal kW for 20 C 68 F Air Delivery Nominal kW for 25 C 77 F Air Delivery Nominal kW for 30 C 86 F Air Delivery LIF EBREATH Model 2500IFD THE ULTIMATE AIR EXCHANGER SPECIFICATIONS AIR FLOW 2100 cfm 985 L s at 1 0 wg ESP Supply from Outside PERFORMANCE Exhaust to Outside 70 effective at 2500 cfm 1172 L s CORE Modular aluminum sensible heat recovery core Plate to plate type Slides out of either side of cabinet for service MOTORS Motors 2 Two single shaft PSC 3 speed 208 230V 5 1 amps 1 ph 1 hp BLOWERS Two direct drive centrifugal blowers one per air stream FILTERS Supply to Build Two 18 X 24 4 inch pleated filters in each air stream d DUCT CONNECTIONS Four 24 X 16 610mm X 406mm CABINET 20 gauge powder coated galvanized steel G60 for superior corrosion resistance 16 gauge galvanized frame insulated with1 5 fibreglass insulation to prevent condensation DRAIN Two stainless steel drain pans with 1 2 NPT drain spouts lt MOUNTING SIDE VIEW Unit to be set on support brackets hung by threaded rod type apparatus Brackets and rod not provided NOTE Removable service access panels on both sides of 2500IFD cabinet CONTROLS Supply from 24V terminal strip inside electrical box to connect
10. aight duct The Pitot tube should be connected to a magnehelic gauge or other manometer capable of reading from 0 to 0 25 in 0 62 Pa of water preferably to 3 digits of resolution The tube coming out of the top of the pitot is connected to the high pressure side of the gauge The tube coming out of the side of the pitot is con nected to the low pressure or reference side of the gauge Insert the Pitot tube into the duct pointing the tip into the airflow For general balancing it is sufficient to move the pitot tube around in the duct and take an average or 14 typical reading Repeat this procedure in the other supply or return duct Determine which duct has the highest airflow highest reading on the gauge Then damper that airflow back to match the lower reading from the other duct The flows should now be balanced Actual airflow can be determined from the gauge reading The value read on the gauge is called the velocity pressure The Pitot tube comes with a chart that will give the air flow velocity based on the velocity pressure indicated by the gauge This velocity will be in either feet per minute or metres per second To determine the actual airflow the velocity is multi plied by the cross sectional area of the duct being measured This is an example for determining the airflow in a 6 duct The Pitot tube reading was 0 025 inches of water From the chart this is 640 feet per minute The 6 duct has a cross
11. ant and sealed with aluminum duct tape to prevent leakage Outside Weatherhoods The 2500EFD is shipped with 2 weatherhoods inside the cabinet which attach to the outer ends of the cabi net using bolts provided The 2500IFD requires hoods to be built elsewhere and provided by the contractor The 2500EFD has built in screens to prevent foreign objects from entering into the ductwork through the out side hoods 12 NOTE It is extremely important to design and install the fresh air intake in an area where the hoods will gather the freshest air free from restriction Recommended no less than 10 ft 3 m apart from each other at least 18 in 46 cm above ground level away from sources of contaminants such as automobile exhaust fumes gas meters garbage containers cooling towers etc not exposed to prevailing winds whenever reasonably possible The outside perimeter of the weatherhood must be caulked to prevent leakage into the building The design and size of the weatherhoods or louvers chosen by the installer must allow for adequate free area Water and snow penetration of the system is min imized when the airflow does not exceed 750 FPM 3 81m s free area velocity Ducting from the Weatherhoods Galvanized sheet metal ducting with sufficient cross section with an integral single piece vapour barrier should be used to connect the HRV to the weather hoods All ducting must meet ULC Class 1 Fire Rating A minim
12. cial and industrial applications to provide fresh air to 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 Heat Recovery Ventilator will help in cooling the incoming fresh air with the stale air that is being exhausted 2500 F D Interior Fan mount Defrost 2500 E F Exterior Fan roof mount Defrost Table of Contents INIFOGUCHON e 2 Select Correct y zi m 3 Specifications Model 2500IFD 4 Specifications Model 2500EFD 5 Options amp Accessories 6 Operation Instructions cutis 7 Installation Tips scs 7 Remote Controls sse 8 User Adjustable Defrost 8 Defrost Control score 8 Fat DONIS elle 9 comite 9 NOUNINO 9 c 12 DUCUNG asii 12 Return and SUPPIY cats 13 Air Flow Balancing scel 14 The Integrated HVAC System 15 Electrical Connections sss 15 Maintenance inni 15 Wiring Diagram nnn 17 Ladder Diagrami soa 18 Wallonie 19 Selecting t
13. correspond ing slot Once both pieces are flush the process is side piece complete See Figure 3 slot for tab locking tab 4 Drive one spike provided into wood nailer strips at each corner See Figure 3 Figure 2 FRAME APPLICATION AND LOCATION This roof mounting frame provides necessary support when the unit is installed The frame can be installed directly on deck having adequate structural strength or wood nailer strip on roof supports under deck wood nailer strip Q 0 SECURING THE FRAME b TT 0 To ensure proper mating with unit it is critical that side piece mounting frame be squared to the roof as follows suina end piece 1 With frame situated level in desired location on roof locking tab trusses tack weld one corner of frame 2 Measure frame diagonally from one corner to the Figure 3 opposite corner Repeat with the remaining two cor ners These dimensions must be equal for the frame to be square 3 It is extremely important to sight frame from all cor wood nailer strips ners to ensure that the frame is not twisted across top side Shim frame under any low sides 4 After frame has been squared straightened and shimmed weld or attach frame securely to roof MAX SLOPE TOLERANCE 1 16 per linear tabs through slots foot in any direction Note specification of duct location on bottom of HRV when positioning cross members duct cavity Drains Connect the stainless steel drain pan
14. drain hoses are clear and there is sufficient space for service access BLOWER STALE AIR TO OUTSIDE FRESH AIR TO INSIDE BLOWER Mounting the 2500 2500IFD Saddle mount not provided Threaded rods NOTE When installing your Lifebreath HRV flexible duct connectors should be installed between the HRV and the galvanized ductwork 2500IFD Platform mount not provided 2 X 4 under unit and on top of hanging bracket to prevent weight of unit from being put on lip of cabinet U channels Lip Hang unit with threaded rods and U channel members 2500EFD Roof mount Vibration isolators May be anchored to floor leaving space for drain connections Mount unit on wooden or metal support assembly Unit must be raised an adequate height for installation and slope of drain lines Roof curb NOTE Roof curb is one inch smaller than outside dimensions of cabinet 10 Roof Curb Assembly Instructions FRAME ASSEMBLY Roof Curb Assembly 1 Take one end piece locking tabs and one side Figure 1 piece slots Stand both pieces vertically on the floor or roof See Figure 1 2 Raise slightly the corner of the end piece locking tabs and mate with side piece slots ensuring that lower locking tab with leading edge is through slot opening See Figure 2 3 Push down on top edge of end piece Ensure that all 3 of the locking tabs are feeding into each
15. er cabinet Four 28 X 18 711mm X 457mm hoods included on side of cabinet with screens CABINET 20 gauge powder coated galvanized steel G60 for superior corrosion resistance 16 gauge galvanized frame insulated with 1 5 fibreglass insulation to pre vent condensation DRAIN Two stainless steel drain pans with 1 2 drain spouts MOUNTING Rooftop mounted on optional roof curb Part No 53 2500 CONTROLS 24V terminal strip inside electrical box to connect optional remote controls not included obtain on off and high low functions DEFROST Factory set defrost time user adjustable Supply motor is shut off while exhaust air defrosts core WARRANTY 15 year warranty on heat exchanger and 2 years on parts WEIGHT 700 lbs SHIPPING WEIGHT 1100 Ibs OPTIONAL CURB WEIGHT 50 lbs DATE Model 2500EFD ROOFTOP Exhaust Hoods 2 c w Bug Screen Exhaust Duct 24 x16 Heat Exchange Core Supply Duct 24 16 Drain Pans 2 NOTE Roof curb is one inch smaller than outside dimensions of cabinet Filter Service Panel Heat Exchanger Service Panel Electrical Service Panel lt 89 9 SIDE VIEW NOTE Removable service access panels on both sides of 2500EFD cabinet 44 95 gt lt 44 95 8 8 218 25 8 8 Hood f ie gt lt boo Bottom duct TA TA connections
16. he Correct Size HRV Commercial and Institutional Requirements For outdoor air requirements ASHRAE has produced the Ventilation Standard 62 1989 that is used to determine acceptable ventilation rates This standard is referenced directly or used as Good Engineering Practice in most Code documents or design criteria Small restaurants Donut Shops and Fast food stores Seats 40 Employees Total 45 ASHRAE requirement Ventilation required Bar or Tavern Seats 50 Employees Total 57 ASHRAE requirement Ventilation required 20 10 L s per person 45 x 20 900 cfm 450 L s 30 15 L s per person 57 x 30 1710 cfm 855 L s Classroom and School Portables Seats 29 Teacher 1 Total 30 ASHRAE requirement Ventilation required Beauty Salon Customers 12 Employees 6 Total 18 ASHRAE requirement Ventilation required Outdoor Temp Ge Fe 15 cfm 7 5 L s per person 30 x 15 450 cfm 255 L s 25 12 5 L s per person 18x25 450 cfm 255 L s Bank Customers Staff 9 Total 34 ASHRAE requirement Ventilation required Bingo Hall Customers 180 Staff 20 Total 200 ASHRAE requirement Ventilation required Print Shop Duplicating Square footage of shop ASHRAE requirement Ventilation required Swimming Pools 20 cfm 10 L s per person 34 x 20 680 cfm 320 L s 30 cfm 15 L s per person 200 x 30 6000 cfm 3000 L s 2000 square ft 0 5 cfm ft2 2 5 L s m2 200
17. ilt in dehumidistat 99 130 DEHUMIDISTAT Activates high speed when indoor humidity rises above set point on control 99 140 4 TECHGRILLE 99 141 5 TECHGRILLE 99 142 6 TECHGRILLE 99 148 8 TECHGRILLE Round white step type diffusers 53 2500 OPTIONAL ROOF CURB Supports HRV on roof and connects HRV to ducting below WEIGHT 50lbs Information about design built electric make up heat coils available upon request NOTE Exhaust Relative Humidity RH at 40 1089 1133 1228 1322 1416 2200 2400 2600 2800 3000 Roof Curb optional Part No 53 2500 R Factory installed eturn air perimeter wooden opening nailer strip 1 Bottom duct Connections Stale Air Return Fresh Air Supply TOP VIEW SIDE VIEW Operation Instructions The LIFEBREATH 2500 series HRV is designed tobe operated continuously or intermittently to meet the requirements of the application Continuous Operation For continuous operation a simple jumper across the ON OFF and COMMON jumper terminals 15 needed HIGH LOW speed selection requires another jumper across HIGH LOW and COMMON select as required see below and wiring diagram ON OFF T2 High Low HIGH LOW T1 Common Low Voltage 24VAC Internittent Operation Due to variance in the times in which buildings are occupied and equipment or machinery operated intermittent ventilation may be the
18. ins defrost OFF DEFROST OFF 50 HR 30 mins 40 F 40 C 15 mins defrost ON 30 mins defrost OFF Fan Defrost The Models 2500IFD and 2500EFD are equipped with an electronically controlled fan defrost system to remove frost that collects on the warm air side of the aluminum heat transfer surfaces of the heat exchanger core When the outside temperature drops below 27 3 a defrost timer is activated which provides for an auto matic defrost cycle During the automatic defrost cycle the fresh air supply is shut off while the exhaust fan continues to operate Both the times between defrost cycles and the length of time spent in defrost are adjustable see pg 9 for details This allows warm inside air to flow over the heat exchanger core melting any frost accumulation After the defrost period the fresh air supply fan automatically returns to the normal speed and fresh outside air continues to be drawn into the building Water from the melted frost collects in the bottom drip pans and drains out through the bottom drain connections The defrost cycle repeats automati cally until the air temperature rises above 27 F 3 C Location The 2500EFD is designed to be mounted outdoors usual ly fastened to a roof curb assembly Special care and attention should be given to positioning the cross mem bers of the roof curb so that they line up exactly with the duct openings on the HRV see pg 7 The 25001FD must be located
19. leak or become perforated due to corrosion caused by normal use Damage resulting from all other causes including but not limited to lighting hurricane tornado earthquake or any other acts of God improper installation modification alteration or misuse of the LIFEBREATH or its operation in a manner contrary to the instructions accompanying the unit at the time of sale accidental or intentional damage neglect improper care or other failure by the owner to provide reasonable and necessary maintenance of the product any attempt at repair by an unauthorized service representative or not in accordance with this warranty or any other causes beyond the control of NUTECH are excluded from this warranty If you feel that the LIFEBREATH you purchased is not free from manufacturing defects please contact NUTECH BRANDS INC 511 McCormick Blvd London Ontario NSW 4C8 519 457 1904 or fax 519 457 1676 to find the name of your nearest dealer in order to repair the product The labour required to install any replacement part s shall be dealt with at the option of the cus tomer in either of the following ways a the customer may supply labour at their own expense or b if the product was purchased from a dealer then the dealer will supply labour at cost to the customer NUTECH reserves the right to replace the entire unit or to refund the original purchase price in lieu of repair NUTECH MAKES NO EXPRESS WARRANTIES EXCEPT FOR THOSE
20. leted All of the HRV s components are in place and functioning properly Balancing dampers are fully open Unit is on HIGH speed Air flows in branch lines to specific areas of the house should be adjusted first prior to balancing the unit A smoke pencil used at the grilles is a good indicator of each branch line s relative air flow 6 After taking readings of both the stale air to the HRV duct and fresh air to the house duct the duct with the lower CFM L s velocity reading should be left alone while the duct with the higher reading should be dampered back to match the lower reading 7 Return unit to appropriate fan speed for normal operation 2 3 4 5 BALANCING PROCEDURE The following is a method of field balancing an HRV using a Pitot tube advantageous in situations when flow stations are not installed in the duct work Procedure should be performed with the HRV on high speed The first step is to operate all mechanical systems on high speed which have an influence on the ventilation system i e the HRV itself and the forced air furnace or air handler if applicable This will provide the maxi mum pressure that the HRV will need to overcome and allow for a more accurate balance of the unit Drill a small hole in the duct about 3 16 three feet downstream of any elbows or bends and one foot upstream of any elbows or bends These are recommended distances but the actual installation may limit the amount of str
21. or pool area anywhere that humidity ON is a concern connect 1 unit only Ventilation control turns HRV system OFF and ON Dehumidistat increases ventilation when required High speed override switch a DEHUMIDISTAT VENTILATION CONTROL Red common Black hi low Orange on off SEE PART NO 99 116 c w 3 wire cable 60 18m HIGH REMOTE DEHUMIDISTAT LOCATION Spa or pool area anywhere that humidity Supplied is a concern and Installed Provides high speed ventilation when humidity level LOW by Contractor exceeds selected setting PART NO 99 130 CRANK TIMER Provides high speed ventilation as required Crank Timer 60 minute PART 99 101 ON OFF HIGH LOW COMMON User Adjustable Defrost Defrost timer device Yellow see wiring diagram for location OPERATION Once the snap disk senses temperatures below 3 C 27 F it will activate the defrost mode which begins with the Defrost OFF cycle and Yellow outer dial adjusts length of time then continues into the Defrost ON cycle between deficsteydes OFF cycle Orange Orange center dial adjusts time spent in defrost mode ON cycle Factory pre set dial positions DO NOT ADJUST EXAMPLES OF DEFROST CYCLES Factory pre set defrost cycle and time are 32 F 0 C No defrost required DEFROST ON 15 HR 10 mins 13 F 11 C 10 mins defrost ON 30 m
22. ore protruding from cabinet with water and or a mild cleaning solution Push core through to the other side of the cabinet and repeat procedure to clean the other side of the core In many cases only a vacuuming of the core surface is required Inspect filters and replace as necessary Wipe down drain pans and inside of cabinet using a mild disinfectant Ensure condensate drain has free flow of moisture Inspect blowers and electrical panel Confirm operation The Integrated HVAC System ROOFTOP HEAT COOL UNIT AN SUPPLY DUCT DAMPERS OR ADJUSTABLE GRILLES EXHAUST TOHRV S ROOF DECK Check design static pressure of air handler to ensure it is compatible with HRV FRESH AIR TO BUILDING FRESH AIR SUPPLY STALE AIR EXHAUST gt RETURN AIR buci A HRV UNIT BALANCING DAMPERS Figure 4 ROOFTOP HEAT COOL UNIT CEILING RETURN AIR PLENUM FRESH AIR INTAKE HRV UNIT STALE AIR EXHAUST DUCT BALANCING DAMPERS BALANCING DAMPERS A Fresh Air Supply B Stale Air Exhaust SUPPLY DUCTWORK 27 Ns STALE AIR EXHAUST HRV FRESH AIR SUPPLY Figure 5 2500 WIRING DIAGRAM SUPPLY BROWN CAP EXHAUST BROWN CAP
23. preferred method Dry contacts located inside the electrical panel enable this unit to turn ON and OFF and or jump between HIGH and LOW speeds when optional low voltage controls are connected see above and pg 9 Optional Remote Controls Basic controls such as dehumidistats mechanical crank timers 24 hour timers or toggle switches can be used to control the unit see pg 9 Installation Tips 1 Whichever method is chosen to operate the 2500 keep in mind that Air to Air exchangers in general are not booster fans and are normally sized to ventilate at a steady rate To achieve optimum performance from the 2500 the desired ventilation rate speed of the system should be reached before the contaminant to be removed has reached its maximum EXAMPLE A bingo hall opening at 7 00PM that is sized for 5000 cfm should have at least this amount of air exchange by that time If the unit is not turned on or set to its designated speed until after the con taminant has reached an uncomfortable level then it may result in a number of hours passing before the system could catch up 2 ltis highly recommended that back draft dampers be installed in the supply and exhaust duct work to the outside to prevent air from entering in through the HRV when the unit is off Failure to install back draft dampers may result in damage to HVAC equipment and or other building components Optional Remote Controls Veas LOCATION Spa
24. rough Nutech The use of balancing dampers or adjustable grilles as supply air diffusers and air exhaust grilles are recom mended TECHGRILLES are round efficient sound absorbing devices available in 4 5 6 and 8 100 125 150 and 200mm AIR FLOW SUPPLY AIR FLOW EXHAUST TECHGRILLE optional schematic PITOT TUBE AIR FLOW BALANCING Commercial It is necessary to have balanced air flows in an HRV The volume of air brought in from the outside must equal the volume of air exhausted by the unit If the air flows are not properly balanced then The HRV may not operate at its maximum efficiency A negative or positive air pressure may occur in the house The unit may not defrost properly Failure to balance HRV properly may void warranty Excessive positive pressure may drive moist indoor air into the exter nal walls of the building where it may condense in cold weather and degrade structural components May also cause key holes to freeze up Excessive negative pressure may have several undesirable effects In some geographic locations soil gases such as methane and radon gas may be drawn into the home through basement ground contact areas Excessive negative pressure may also cause the backdrafting of vented combustion equipment Read the Application Warning on the front of this manual Prior to balancing ensure that 1 All sealing of the ductwork system has been comp
25. ry to provide general exhaust from the space the air to be exhausted may be taken directly from the return air plenum to the HRV as it is drawn back to the air handler Fresh air supplied by the HRV is then intro duced directly into the return air plenum but at a location closer to the air handler The air handler would have a constant running blower to effectively distribute the fresh air and remove the stale air Balancing dampers would be located in both the HRV supply and exhaust ducts between the return air plenum and the HRV Electrical Connections System is 208 230V 1 phase 60 Hz This unit meets all local codes and requirements It is STRONGLY recommended that an electrical disconnect be installed prior to the HRV and that it is turned off and locked out before servicing the unit All electrical connections should be made by a qualified electrician Two 2 knock outs are provided One is to be used for line voltage and the other one for 24V control wires Maintenance As with any mechanical system a dedicated maintenance program will prolong the life of the equipment and maintain its optimum performance We recommend at least two 2 full inspections and cleanings per year under normal operating conditions and more if circumstances warrant it Service should include Cleaning of screens protecting outside hoods Cleaning of core To access core remove service panels and slide core halfway out Wash c
26. s in the bottom of the HRV to a drain line fastened to the holes provided See pg 10 for location of the drain pans and the drain connections Create a P trap to prevent odours from being drawn through Make sure the drain line slopes down to drain properly and if this is not possible a con densate pump will be required for removal of the water Note that stagnant water is a leading cause of indoor air quality problems confirm drainage after installation by pouring water into trays Drain line must be installed where it will not freeze The Ductwork System A well designed ducting system will allow the HRV to operate at its maximum efficiency Avoid the use of undersized ducting and sharp radius bends and tees which can significantly increase the system pressure drop and reduce the air flows NOTE Fully insulated ducting with an integral vapour barrier must be used on all runs passing through unheated areas in order to avoid condensation problems and energy losses from the air streams Consult local Codes To minimize pressure drop and noise galvanized metal ducts sized for 1200 fpm 6 09 m s maximum velocity are recommended Keep ducting as short as possible and use a minimum of elbows and tees Connecting sections and shorter runs may be flexible ducting one size larger than the metal duct Use flexible duct connectors at the HRV to avoid noise transmission All duct joints must be secured with screws rivets or duct seal
27. sectional area of 3 14 x 6 12 4 0 2 square feet The airflow is then 640 ft min X 0 2 square feet 128 cfm For your convenience the cross sectional area of some common round duct is listed below DUCT DIAM inches CROSS SECTION AREA sq ft 5 0 14 6 0 20 7 0 27 The accuracy of the air flow reading will be affected by how close to any elbows or bends the readings are taken Accuracy can be increased by taking an average of multiple readings as outlined in the literature supplied with the Pitot tube Pitot tube and gauge Pitot Tube Air Flow Balancing Kit c w magnehelic gauge Pitot tube hose and carry case PART NO 99 167 Outdoors Note Duct connections may vary depending on model Place pitot tube a minimum of 18 from blower or elbows The Integrated HVAC System WARNING The 2500 15 a quiet efficient low pressure system Special care and attention should be given if connecting this unit to any other air handler that may draw more air than the 2500 is designed to accommodate The HRV has become an integral component of the HVAC system Figure 4 shows an HRV unit provid ing fresh air directly to the return air plenum of a Rooftop heat cool unit Many buildings have a ceiling return air plenum as in Figure 5 Fresh air from the HRV can be intro duced directly into the ceiling space near the air handler s intake In installations where it is satisfacto
28. um R value of insulation should be equal to 4 RSI 0 75 or as stated in local codes A good bead of high quality caulking preferably acoustical sealant and taping with a high quality alu minum foil tape is recommended to seal the duct to both the HRV and the weatherhood Warmside Ducting General Ducting from the HRV to different areas within the building should be galvanized metal whenever possible To minimize airflow losses in the ductwork system all ducts should be as short as possible and with as few bends or elbows as possible 45 elbows are preferred to 90 elbows whenever possible Use Y tees instead of 90 tees whenever possible All duct joints must be fastened securely and wrapped with a quality duct tape to prevent leakage We recom mend aluminum foil tape Stale Air Return System The stale air return system is used to draw air from the points in the building where the worst air quality prob lems occur Balancing dampers and or adjustable grilles are recommended on all return air lines which are used during installation to help balance the draw from different areas of the building Note that the installation schematics show balancing dampers and or adjustable grilles on all return air lines coming back to the unit Alternately the stale air may be drawn directly from the return air duct When this system is used the air han dler s blower will need to operate constantly when ven tilation is required
Download Pdf Manuals
Related Search