Heat Your Home Cool Your Home Ventilate Your Home All With One Unit
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1 By: Nu-Air Ventilation Systems Inc. Heat Your Home Cool Your Home Ventilate Your Home All With One Unit OPERATING MANUAL EN400, EN500, EN700, AND EN900 SERIES July 2011 Page 1 of 37
2 TABLE OF CONTENTS 1 GETTING STARTED ELECTRICAL CONNECTIONS CONTROL WIRING THERMOSTAT VENTILATION CONTROLS BOILER INTERLOCK DIMENSIONAL DATA OPEN SYSTEM CLOSED SYSTEM OFF SEASON PUMP EXERCISER PUMP AIR VENT COOLING COIL CONNECTION DUCTING TRADITIONAL DUCTING (LOW VELOCITY) VELOCITY DUCTING Hi-Velocity Grills (HV-GR3) HRV DUCTING Ducting To The Outside Weather Hoods Locating the Weather Hoods Notes on Locating the Weather Hoods DRAINS COMMISSIONING WATER SIDE COMMISSIONING Filling the water heater and setting system temperature: To fill the heating loop: Purging the pump and verifying flow in the heating loop: Water flow Balancing: SERVICE AND MAINTENANCE: TROUBLESHOOTING WIRING DIAGRAM APPENDIX C COMISSIONING SHEET SPECIFICATIONS ECM SETTINGS WARRANTY July 2011 Page 2 of 37
3 1 GETTING STARTED The unit is shipped complete with the following: 1. The air-handler HRV module 2. Circulating pump 3. Check valve 4. Filters 5. HRV drain kit Additional items required which are field installed include: plumbing fittings and valves such as an air purge valve, anti scald valve, shut off valve, gate valves, pipe insulation and drain valves. Also required are duct fittings, a thermostat, a dehumidistat and other accessories such as grills and wire. Note: When locating/placing the Enerboss, ensure there is a minimum clearance of 8 inches below to allow for drain pipe connections. This can be accomplished by way of stand (Part # Ener Stand) or blocks. 2 ELECTRICAL CONNECTIONS A single point, hard-wired electrical connection requiring 115 VAC service and a dedicated 15 amp fused circuit (20 Amp for EN900 series, 1 hp). 3 CONTROL WIRING 3.1 Thermostat A heat/cool thermostat with fan switch connects to J7 R, G, Y, W1. C is 24V common. W2, X1,X2,X3,X4 are not used. 3.2 Ventilation controls A two wire dehumidistat and/or mechanical timers connect to J85&3 (24V and Humidity) for automatic high speed ventilation. Nu-Air s WIN20 push button connects to J8 1,2& Boiler interlock J6 1&2 labeled relay provide dry contact switch closure whenever there is a call for heat from the thermostat. Conect these to the boilers thermostat terminals. July 2011 Page 3 of 37
4 4 DIMENSIONAL DATA EN500, EN700, AND EN900 SERIES EN400 SERIES July 2011 Page 4 of 37
5 Enerboss Minimum Clearances July 2011 Page 5 of 37
6 4 PLUMBING All plumbing between components is typically done with 3/4" copper pipe and appropriate fittings. All interconnecting piping is to be insulated. System Types: a) An Open System uses hot water from the residential hot water heater to supply both domestic hot water and hot water to the Enerboss for space heat. See schematic on next page. Well systems that incorporate a pressure tank are normally open systems. b) A system becomes closed when a backflow prevention valve or check valve is installed in the cold water pipe upstream of the water heater. The backflow prevention valve does not allow pressure created by the heated water to be relieved into the cold water system. Therefore an expansion tank must be installed. Local codes may require this type of system. The spring loaded check valve (supplied) must be installed on the return water line close to the Enerboss. Ensure flow arrow points to tank or boiler. An air purge valve should be installed at the high point in the supply line close to the Enerboss. 4.1 Open System July 2011 Page 6 of 37
7 4.2 Closed System 4.3Off Season Pump Exerciser The Enerboss's control features an automatic 24 hour pump exerciser. If there has been no pump activity after 24 hours, the Enerboss will automatically circulate water in the system for 1 minute. This is done to prevent water in the coil from becoming stagnant during long periods without a call for heat. 4.4Pump Air Vent To vent air from the pump, loosen the large screw on the front of the pump motor until water asppears. Retighten the screw. Important: Failure to vent the pumpwill cause the pump to fail prematurely and void the warranty. 4.5Cooling Coil Connection The (optional) cooling coil is supplied with a ½ OD nozzle (this is not an orifice). To ensure proper flow, the use of a TX Valve with ½ outlet is recommended inline between the nozzle and outdoor unit. The TX valve (not included) may be soldered directly to the nozzle, followed by the copper pipe to the outdoor unit (contractor to supply fittings as necessary). Direct application of heat to the nozzle fitting is acceptable and will not cause damage. Protect the distributor tubes with a wet rag. (Use R22 or R410). July 2011 Page 7 of 37
8 Models EN4018i, EN4118i, EN5018, 5118i with - R22 Refrigerant use Sporlan Valve p/n SBFVE-A-C sweat fit, externally equalized or equivalent. R-410 Refrigerant use Sporlan Valve p/n RZE11/2GA sweat fit, externally equalized or equivalent. Models EN4024i, EN4124i, EN5024i, EN5124i, EN5030i, EN5130i, EN7024i, EN7124i, EN7030i, EN7130i with - R22 Refrigerant use Sporlan Valve p/n SBFVE-B-C sweat fit, externally equalized or equivalent. R-410 Refrigerant use Sporlan Valve p/n RZE2GA sweat fit, externally equalized or equivalent. DX Heat Pump Systems For heat pump systems contact your condenser unit manufacturer for the recommended TX valve type. NOTE: Nu-Air does NOT supply TX valves, these should be available from your condenser supplier. 5 DUCTING Air Handler The Enerboss distributes heating, cooling and ventilation air through a 22 x 21 (500, 700, and 900 series) or 20 x 10 (400 series) rectangular plenum in an up-blast configuration. Return air enters the unit through a 16 x 20 (500, 700, and 900 series) or 16 x6 (400 series) rectangular duct opening located on the side. Proper sizing of the return air duct is critical to unit performance (see table below for return air duct sizing). For Models with integral slab cooling coils turning vanes in the last return bend are recommended for optimum performance. NOTE: Units with HRV or integrated cooling coil must be installed on a minimum 8 stand or blocking to allow for condensate drainage and easy access to connections from below the unit. RETURN AIR 5.4 Traditional Ducting (Low Velocity) Good engineering practice should be followed when designing a duct system. Nu-Air recommends the use of HRAI's Residential Air System Design Manual. SUPPLY AIR 22 x 22 DEEP 18X 20 EXHAUST AIR FROM SPACE (6" DIA INSULATED) DAMPER NOTE: A damper is required in the main return duct for balancing the HRV during commissioning. FRESH AIR FROM OUTSIDE 6" EXHAUST AIR TO OUTSIDE (BEHIND, NOT SHOWN) (6" DIA INSULATED) Low velocity ducting Do s and Don ts July 2011 Page 8 of 37
9 5.5 High Velocity Ducting HI VELOCITY DUCT DESIGN General System Description: 1. Nu-Air's high velocity system is based on a 3" diameter aluminum insulated flex duct system with a maximum lead length of 25 feet and minimum lead length 10. For even distribution keep lengths to a max of 30% differential between shortest and longest. 2. A directional 3" vertical throw grill should be used (EN-GR3). 3. A plenum of 22 x 22 (500, 700, and 900 series) or 20 x 10 (400 series) inches square and a minimum of 24 inches high connect the Enerboss to the duct system. Good engineering practice should be followed. It is recommended that the plenum be acoustically insulated for sound attenuation. 4. High velocity duct systems operate at higher pressures than traditional duct systems. Care must be taken to seal all joints and seams with duct compound or tape to ensure proper air distribution and noise control. Trunk ducts should carry a max fpm velocity. 5. Follow good engineering practices. Avoid placing ducts in attics or unconditioned spaces. If this cannot be avoided, insulate the ducts to the R-value required in the National Building for your design temperature. 6. A room by room heat loss and heat gain determination is recommended. 7. Balance the airflow, heat and cooling output at each grill using a CFM range of per lead and outputs within 25% of design. 8. Follow the table above to determine the maximum and minimum number of leads available. 9. Return air ducting connects to the Enerboss using a 16 x 20 (500, 700, and 900 series) or 16 x 6 (400 series) opening. Vibration isolation (e.g. flex connector) is recommended at the return air drop. 10. Return air should be picked up in a neutral, central location and is sized in the same way as a traditional low velocity system (max. 700 fpm). Return air must be filtered prior to entering the Enerboss using the filter provided. July 2011 Page 9 of 37
10 11. A damper is required in the main return duct for balancing the HRV during commissioning. High Velocity Ducting Options System 1 Termination Grills Within 25ft of Supply Plenum When maximum lead length is 25' or less from plenum, leads can be taken directly off the plenum using side or top take-offs. This can eliminate bulkheads and the cost associated with boxing these in. Only two fitting types - flex duct and HV-GR3 grills are needed. System 2 - Leads Longer Than 25 Feet For systems where the length from grill to plenum is longer than 25', one (1) or two (2) main carrying trunk(s) is needed (see Enerboss HI-V Duct sizing Table). Hi-Velocity Example (system 2) July 2011 Page 10 of 37
11 System 3 - Elements of System 1 and 2 Combined. TRUNK 3 branch 24 plenum Acoustically insulated General design criteria for the HI-V system are: Trunk duct should be designed to carry the greater of heating or cooling CFM at FPM max. Trunk duct lengths are shown in equivalent length Two trunks can be used or a combination of system 1 and 2 with one trunk is acceptable Take offs should be spaced a minimum of 12" apart Take offs can be oriented in any suitable direction Branch ducts should be designed to deliver 50 to 70 CFM at each 3 grill. Return Duct Sizing The return duct is always low velocity with maximum 700FPM and optimum 600FPM. To calculate return duct size: Minimum duct size = Max Airflow (CFM) Max Velocity (FPM) E.G.: 713 choose highest of cooling and heating cfm. Minimum Return Duct = 1200CFM = 1.71sq/ft = 1.71 x 144 = 247 sq/in = 20 x 12 minimum return duct 700FPM Optimum Return Duct = 1200CFM = 2.00 sq/ft = 2.00 x 144 = 288 sq/in = 24 x 12 optimum return duct 600FPM Branch Ducts Use 3 galvanized duct or 3 foil flex duct. In cooling systems use insulated duct. In high pressure systems it is important to tape or seal all seams & joints against leakage. NOTE: The Hi-Velocity duct system must be designed so that total external static does not exceed 1.5 w.c. July 2011 Page 11 of 37
12 EN SERIES BTU / LEAD - HEATING BTU/Hr in Inlet Water Temperature Model CFM Trunk Duct(s) Max. Trunk Length Take-Offs/ Trunk # Leads/ trunk CFM/ Lead 100 F 120 F 130 F BTU / Lead Total BTU / Lead Total BTU / Lead Total 140 F 150 F 160 F 170 F BTU / Lead Total BTU / Lead Total BTU / Lead Total BTU / Lead Total 180 F BTU / Lead Total 4018e, 4024e, 4018i, 4024i, 4118e, 4124e, 4118i, 4124i 650 8" x 1 50' 10 to x 2 6" x 2 25' ea. 5 to e, 5024e, 5030e, 5036e, 5018i, 5024i, 5030i, 5118e, 5124e, 5130e, 5136e, 5118i, 5124i, 5130i " x 1 80' 475 x 2 14 to 19 8" x 2 50' ea. 7 to e, 7030e, 7036e, 7024i, 7030i, 7124e, 7130e, 7136e, 7124i, 7130i " x 1 150' 575 x 2 8" x 2 30' ea. 17 to 23 8 to ,806 2,272 2,743 3,217 3,699 4,176 4,736 5, ,734 2,181 2,633 3,088 3,551 4,009 4,547 5, ,667 2,098 2,532 2,970 3,414 3,854 4,372 4, " x 1 125' 24 to ,606 2,020 2,438 2,860 3,288 3,712 4,210 4, ,548 1,948 2,351 2,757 3,170 3,579 4,060 4, e, 9148e ,495 1,881 2,270 2,662 3,061 3,456 3,920 4,329 43,353 54,536 65,825 77,208 88, , , ,445 1,818 2,194 2,574 2,959 3,340 3,789 4, , x 2 10" x 2 35' ea 12 to ,806 2,272 2,743 3,217 3,695 4,176 4,736 5, ,667 2,098 2,532 2,970 3,411 3,854 4,372 4, ,548 1,948 2,351 2,757 3,167 3,579 4,060 4, ,445 1,818 2,194 2,574 2,956 3,340 3,789 4, e, 9160e " x 1 150' 30 to ,615 2,033 2,455 2,882 3,311 3,826 4,272 4, ,569 1,968 2,376 2,789 3,204 3,702 4,134 4, ,520 1,906 2,302 2,702 3,104 3,587 4,005 4, ,474 1,848 2,232 2,620 3,010 3,478 3,884 4, ,431 1,794 2,167 2,543 2,922 3,376 3,769 4, ,390 48,461 1,743 60,997 2,105 73,664 2,470 86,449 2,838 99,337 3, ,775 3, ,157 4, , ,351 1,694 2,046 2,401 2,759 3,188 3,560 3, X 2 12" x 2 50' ea. 15 to ,346 1,694 2,046 2,401 2,759 3,188 3,560 3, ,615 2,033 2,455 2,882 3,311 3,826 4,272 4, ,514 1,906 2,302 2,702 3,104 3,587 4,005 4, ,425 1,794 2,167 2,543 2,922 3,376 3,769 4,164 July 2011 Page 12 of 37
13 July 2011 Page 13 of 37
14 EN SERIES Hi-V DUCT SIZING Model* Max. CFM Trunk Duct(s) **Max. Trunk Length Take- Offs/ Trunk # Leads/ trunk CFM/ Lead Min. # Takeoffs before reducing Trunk Reduce To 4018i, 4024e (heat only), 4118i, 4124e, (heat only) 650 8" x 1 50' 10 to x 2 6" x 2 25' ea. 5 to " 5" 4024i, 4024e 4124i, 4124e " x 1 100' 13 to x 2 7" x 2 30' ea. 6 to " 5" 5018i, 5024i, 5036e (heat only), 5118i, 5124i, 5136e (heat only) " x 1 80' 14 to " 475 x 2 8" x 2 50' ea. 7 to " 5030i, 5130i 5030e, 5130e " x 1 150' 15 to ' 525 x 2 8" x 2 50' ea. 8 to " 7018i, 7024i, 7030i, 7036e (heat only), 7118i, 7124i, 7130i, 7136e (heat only) " x 1 120' 17 to x 2 8" x 2 30' ea. 8 to " 6" 5036e (w/ext. 3-ton)*, 5136e (w/ext. 3-ton)*, 7036e (w/ext. 3- ton)*, 7136e (w/ext. 3-ton)* " x 1 120' 17 to " 600 x 2 8" x 2 30' ea. 9 to " EN9048e, EN9148e " x 1 150' 24 to " x 2 10" x 2 50' ea 12 to " EN9060e, EN9160e " x 1 150' to " X " x 2 50' ea. 15 to 18 8" *Models with external coils: Trunk ducts must be sized to the higher of the heating or cooling CFM.eg. EN5036e or EN5136e with 3-ton external coil; trunk duct must be sized for 1200 cfm. ** Equivalent Length July 2011 Page 14 of 37
15 Hi-Velocity Grills (HV-GR3) The Enerboss 3 grill (Part#HV-GR3) is specifically designed for the Enerboss Hi- Velocity system to minimize noise and maximize performance and comfort. Grills can be located in ceiling, floor, walls, and kick plates. The high velocity system is designed to throw the delivered air for proper mixing from floor to ceiling. It is important therefore to note the following: Locate grills in low traffic areas: - Room corners - Behind doors - Next to windows - Away from curtains - Kick plates (avoid in front of sink or mirrors) Avoid locations where: grills are: - Likely to be covered by furniture - Directly above tall furniture or cabinets. - Directly above seating areas 3 Hi-Velocity Grill (Part#HV-GR3) (Top View) (Side View) The HV-GR3 grill features a fixed louvered design with a 7 degree pitch. Rotation of the grill can be used to direct airflow towards or away from an object. The 45 degree collar allows for a 90 degree bend in flex without rigid elbows. NOTE: Enerboss 3 grills (Part#HV-GR3) are paintable ABS plastic. Use paints formulated to bond to plastic e.g. KRYLON FUSION spray paint by SHERWIN-WILLIAMS. Alternatively prime with an ALKYD primer and top coat with latex or oil. July 2011 Page 15 of 37
16 5.6 HRV Ducting Fresh air from the outside, exhaust air from space and exhaust air to outside all connect to the left hand side of the unit via 6-inch diameter ducting. The Enerboss with integrated HRV allows for wet room collection of exhaust air via an independent duct system. Six-inch diameter main lines branch off, reduce in size and terminate in the kitchen, washroom, laundry, etc. HRAI and others offer guidelines for duct sizing. Nu-Air recommends the use of these guidelines as good engineering practice Ducting To The Outside Between the weather hoods and the HRV you must use fully insulated ducting with an integrated vapour barrier. Insulated ducting with an integrated vapour barrier must also be used on all runs passing through unheated areas. This will avoid condensation problems and energy losses. The minimum RSI value of insulation should equal that of the local building codes. Weather Hoods 1. Insulated flex duct slides over the galvanized sleeve of the weather hood. 2. Use sheathing tape (red) to join the inner duct to the hood's sleeve. 3. Tape the vapour barrier to back of the hood without compressing the insulation. Caulk or foam seal around the collars and hoods to eliminate air and water leaks. 4. Locate the hoods for easy access to the bird screen for cleaning purposes. Make the insulated duct that connects the weather hoods to the HRV as short as possible to minimize airflow restrictions. Avoid sharp bends and stretch out the inner lining of the flex duct as much as possible to reduce static pressure and maximize airflow Locating the Weather Hoods There should be a minimum of 6 (feet) of separation between the fresh air and exhaust hoods. Supply hoods should be a minimum of 18 (inches) above the ground level. Exhaust hoods should be at least 4 (inches) above the ground level. Holes through the wall should be 1 larger then the collar on the hood. Fresh air hoods must be 3 away from any other appliance exhaust vent or furnace vent. Notes on Locating the Weather Hoods Fresh air intakes should be located away from possible sources of contamination such as: Gas meters Garbage containers Oil fill pipes Vehicle exhaust Dryer or other exhaust Within attics or crawl spaces July 2011 Page 16 of 37
17 6 DRAINS Install drain spouts in the bottom of the HRV section. Tighten with a speed nut and connect 5/8" plastic hose as shown below. Fill the trap with water. 7 COMMISSIONING Commissioning of an Enerboss system requires both air and water side balancing. Units that have an integrated HRV additionally require balancing of the supply and exhaust air streams to within 10% of each other on high speed. Hot water flow and temperature adjustment to the air handler is required on all units as is a thorough flushing of the plumbing to remove any loose solder sludge that can cause problems with the circulator pump and valves. Commissioning measurements should be recorded on the form provided in Appendix C. 1.1 COMMISSIONING 1.1 Supply Air Balancing The supply air motor is an ECM operating in constant cfm mode. Adding static will not significantly reduce the total air flow as you would expect with a psc motor. On ducted systems the amount of air at each grille can be regulated with dampers. 1.2 HRV Balancing The HRV exhaust air can be adjusted in low and high speed using the control board and the procedure that follows. The amount of outside air is adjusted using dampers. A damper in the return air can be closed (partially) to increase outside air flow or opened to decrease outside air flow. If outside air needs to be further reduced, a balancing damper located in the HRV outside air compartment should be used. July 2011 Page 17 of 37
18 When balancing the HRV: -Close all windows, doors and fireplace dampers. -Turn off any exhaust systems such as bathroom fans, range hoods, central vacuums or dryers. There are two modes of operation in which the HRV needs to be balanced. 1) High speed (High ventilation switch). 2) Low speed (thermostat fan ON, no heat or cool calls). Balancing Sequence: High Speed Balancing set supply and exhaust to the specified flows Low speed balancing Fan On. Reduce the higher flow to match the lower Balancing mode 1 High Speed Balancing: With all dampers fully open and the exhaust fan speeds at the factory setting, run the air ahndler in high ventilation mode. a. Outside Air High Speed Adjustment If the outside air flow is too low, gradually close the return air damper until the desired OA flow is measured. If the outside air flow is too high gradually close the outside air balancing damper until the OA flow is obtained. b. Exhaust Air High Speed Adjustment Locate the two blue pots on the circuit board. The top pot adjusts the exhaust fan speed. Turn clockwise to increase and counterclockwise to decrease CFM. Adjust the exhaust flow rate to within 10% of the OA rate. Balancing Mode 2 Low Speed Balancing Measure and record the flow rate of the Outside Air with the air handler in low speed ventilation (fan On, thermostat system switch off) using the same method described above. Note: No adjustment can be made to this flow without affecting the high speed flow and repeating the high speed balance. Measure the exhaust air from building low speed flow. Use the lower pot to adjust the exhaust fan LOW speed. Turn clockwise to increase and counterclockwise to decrease CFM. Adjust until the flow matches that of the outside air. NOTE: For low speed balancing a micro manometer should be used. Magnehelic gagues do not have low enough resolution for these low pressures. Alternatively, velocity may be measured at the outside hoods with a vane anemometer or similar July 2011 Page 18 of 37
19 7.4 Water Side Commissioning Filling the water heater and setting system temperature: 1. At this point all valves should be closed and the system dry. 2. Open the cold water supply valve and a hot water tap. 3. Fill the water heater/boiler with water allowing air to escape at the open tap. Shut off the tap when air has stopped escaping. 4. Using the boiler or water heater's control, set the system to operate at your design temperature. See Equipment Selection Chart and preliminary design information forms. 5. Following the manufacturers instructions, start the water heater and allow it to reach the set point. For cases where high water temperatures are used, an anti-scald valve will be required. Set this to 120 F and verify by measuring the water temperature at the taps To fill the heating loop: 1. Connect a garden hose to the drain valve and direct water to a floor drain or similar. 2. Open the drain valve. 3. Open the heating loop's hot water supply shut off valve 4. Allow water to flow until only water (no air) is flowing at the drain. 5. Close the hot water shut off valve. 6. Open the return water shut off valve and allow water to flow until no air is escaping at the drain. 7. Close the drain valve. 8. Open the hot water shut off valve Purging the pump and verifying flow in the heating loop: 1. Turn on electrical power to the Enerboss. 2. Set the house thermostat well above room temperature to force a call for heat. 3. Check that the circulating pump and fan are operating. 4. Hot water should be entering the fan coil and cooler water leaving. 5. Warm air should be exiting all supply grills/diffusers. 6. Apply the supplied warning label to the water heater near the aqua stat without covering any existing labels Water flow Balancing: This step should be done when both the room air temperature and water heater temperature are stabilized. NOTE: Return air temperature needs to be near 70 F ( 21 C). 1. Initiate a call for heat from the room thermostat. 2. Measure the supply (SAT) and return (RAT) air temperatures. 3. Measure the supply (SWT) and return (RWT) water temperatures 4. Calculate the heat output by the formula: July 2011 Page 19 of 37
20 Btu/hr = (SAT-RAT) x CFM x 1.08 (See Enerboss spec sheet for CFM at heating speed.) 5. If the design heat loss is not being met at this condition, increase the water heater temperature set point and repeat the previous steps 6. If the water temperature drop in the fan coil is less than 20 F, adjust the throttling valve to reduce water flow. NOTE: T increases above 20 F (11 C) increases water heater efficiency. 7. Repeat until heat loss is met and water temperature drop is greater than or equal to 20 F. 8. The minimum recommended supply air temperature is 115 F. 9. If the supply air temperature or heat output cannot be met at with a 20 F water temperature drop, allow a lower temperature drop across the coil. 10. Important - Verify the anti-scald valve is adjusted properly once final adjustments have been made. [ 140 F ( 60 C) or less] 8 SERVICE AND MAINTENANCE: Nu-Air recommends annual service and maintenance by a qualified HVAC contractor. Disconnect the power supply to the Enerboss before attempting any service. Maintenance should include: QUARTERLY 1. Filter Replacement - Return air quarterly (Clean as often as necessary to prevent restriction of air flow). - E/HRV - vacuum quarterly, replace annually. 2. Check outside hoods for debris and blockage (grass cuttings, leaves, insect and bird nests). 3. Wipe down all interior surfaces of the cabinet with disinfectant. ANNUALLY 1. Coil cleaning hot water and evaporator. Vacuum with a brush attachment. If necessary, wash with a non toxic coil cleaner taking precautions not to wet motors and electrical components. Access the A/C coil by removing the return air filter. To access the heating coil, remove the EC motor/blower by disconnecting the two molex connectors and removing the two screws at the front of the blower housing. 2. Fans Vacuum or use a small brush to clean the blades of the main and HRV exhaust fans. To Clean the main fan it may be necessary to remove the blower assembly as described above. 3. HRV core cleaning (aluminum and polypropylene) remove the core by sliding it forward. Wash with warm water and a mild detergent. Shake to remove excess water and replace. 4. ERV core cleaning (cellulose) - remove the core by sliding it forward. Vacuum only; washing will damage the core and void the warranty. 5. Check the controls for proper operation. 6. Check E/HRV air flows and rebalance if necessary. 7. Check boiler/ water heater set point against commissioning report. 8. Inspect the duct work for air leaks (at joints and seams) and blockages (crushed ducts and crimps at elbows). July 2011 Page 20 of 37
21 9 TROUBLESHOOTING Pump fails to start - The pump may stick if it has not been operated for extended periods. Turn off the power, remove the large screw on the end of the pump motor and turn the shaft several times with a screwdriver. Replace the screw and start the pump. Noisy pump air may be trapped in the water circuit. Purge the system of entrapped air. Insufficient or no heat Boiler/water heater temperature set too low Air trapped in heating system Purge system Insufficient flow check for pipping restrictions; open valves Air handler inlet and outlet connections may be reversed Undersized boiler or water heater Undersized air handler Water heater thermostat not properly calibrated July 2011 Page 21 of 37
22 10 WIRING DIAGRAM July 2011 Page 22 of 37
23 July 2011 Page 23 of 37
24 11 The Following Table Outlines Switch Arrangements and Resulting Operating Modes. THERMOSTAT CONNECTIONS DEHUMIDISTAT CONNECTIONS RESULTING MODE OF OPERATION R & G OPEN LOW VENTING R & W OPEN HEATING MODE R & Y OPEN COOLING MODE ANY CLOSED VENTILATION July 2011 Page 24 of 37
25 12 APPENDIX C COMISSIONING SHEET July 2011 Page 25 of 37
26 13 SPECIFICATIONS July 2011 Page 26 of 37
27 By EN400 DX SERIES ENERBOSS AIR HANDLER SPECIFICATIONS Dimensional Data Height Width Depth Supply (TOP) Return (RIGHT) EN4018i; EN4024i EN4018e; EN4024e EN4118i; EN4124i EN4118e; EN4124e X10 20X10 16X6 16X6 n/a 6" dia MODELS Preliminary Selection Chart EN4018i EN4024i EN4018e Heating Capacity (Btu/hr) 100 F (EWT) Heating Capacity (Btu/hr) 120 F (EWT) Heating Capacity (Btu/hr) 130 F (EWT) Heating Capacity (Btu/hr) 140 F (EWT) Heating Capacity (Btu/hr) 150 F (EWT) Heating Capacity (Btu/hr) 160 F (EWT) Heating Capacity (Btu/hr) 170 F (EWT) Heating Capacity (Btu/hr) 180 F (EWT) Nominal Water flow (USGPM) Nominal airflow (heating " esp) * Nominal airflow, circulation mode Nominal airflow, cooling mode* Motor FLA Pump FLA Installed Pump Heating Coil Pressure Drop at nominal flow (water side) (ft) Coil Pressure Drop at heating speed (air side) (inwc) EN4024e EN4118i EN4124i 0.25 HRV capacity, 0.4" esp n/a n/a n/a n/a HRV Efficiency (SRE%) n/a n/a n/a n/a Estimated Weight (lb) Return Air Filter: 16 x 24 x Circo Star 11 BU 5.1 HRV (models without HRV) (models with HRV) EN4118e EN4124e July 2011 Page 27 of 37
28 Ft HOT WATER COIL DATA - ENERBOSS 400 SERIES Coil Construction Type Hot Water Tube OD 1/2 Fin Height x Fin Length 10x21.25 Fin Type Corrugated Aluminum.006" Rows Deep 3 Face Area 1.46 sqft Fins per inch 12 Header 3/4 Pipe Entering Water Temperature (F) Air Side Performance Flow cfm Entering Air Dry Bulb F 70 Entering Air Wet Bulb F n/a Leaving Air Dry Bulb F Leaving Air Wet Bulb F n/a Face Velocity FPM Air Side Pressure Drop inwg 0.2 Water Side Performance Leaving Water Temperature F Number of Circuits F 3 Flow Rate gpm 4 Water Pressure Drop ft Heat Output Btu/hr 13,202 22,230 26,794 31,388 36,006 40,646 45,305 49,981 WILO CIRCO STAR 11 CIRCULATOR (ENERBOSS 400, 500, 700, AND 900 SERIES) Electrical Data Volts Amps Watts HP Capacitor /25 7 uf/250v Flow Head GPM July 2011 Page 28 of 37
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30 July 2011 Page 30 of 37
31 HYDRONIC COIL DATA - ENERBOSS 500 SERIES Coil Construction Type Hot Water Tube OD 5/8 Fin Height x Fin Length 21 x 20 in Fin Type Corrugated Aluminum.006" Rows Deep 3 Face Area 2.9 sqft Fins per inch 12 Header 3/4 Pipe Entering Water Temperature (F) Air Side Performance Flow cfm 950 Entering Air Dry Bulb F 70 Entering Air Wet Bulb F n/a Leaving Air Dry Bulb F Leaving Air Wet Bulb F n/a Face Velocity FPM 326 Air Side Pressure Drop inwg 0.14 Water Side Performance Return Water Temperature F Number of Circuits F 3 Flow Rate gpm 4 Water Pressure Drop ft Liquid Velocity FPS 1.5 Heat Output Btu/hr ,927 47,951 55, ,391 HYDRONIC COIL DATA - ENERBOSS 700 SERIES Coil Construction Type Hot Water Tube OD 5/8 Fin Height x Fin Length 21 x 20 in Fin Type Corrugated Aluminum.006" Rows Deep 4 Face Area 2.9 Fins per inch 12 Header 3/4 Pipe Entering Water Temperature (F) Air Side Performance Flow cfm 1150 Entering Air Dry Bulb F 70 Entering Air Wet Bulb F n/a Delivered Air Dry Bulb F Delivered Air Wet Bulb F n/a Face Velocity FPM 394 Air Side Pressure Drop inwg 0.29 Water Side Performance Entering Water Temperature Return Water Temperature F Number of Circuits F 4 Flow Rate gpm 5 Water Pressure Drop ft Liquid Velocity FPS 1.4 Heat Output Btu/hr ,114 63,408 72, ,056 July 2011 Page 31 of 37
32 Coil Construction Type Hot Water Tube OD 5/8 Fin Height x Fin Length 21 x 20 in Fin Type Corrugated Aluminum.006" Rows Deep 4 Face Area 2.9 Fins per inch 12 Header 3/4 Pipe EN9048e/9148e HYDRONIC COIL DATA - ENERBOSS 900 SERIES Entering Water Temperature (F) Air Side Performance Flow cfm 1600 Entering Air Dry Bulb F 70 Entering Air Wet Bulb F n/a Delivered Air Dry Bulb F Delivered Air Wet Bulb F n/a Face Velocity FPM Air Side Pressure Drop inwg 0.52 Water Side Performance Entering Water Temperature Return Water Temperature F Number of Circuits F 4 Flow Rate gpm 5 Water Pressure Drop ft Liquid Velocity FPS 1.4 Heat Output Btu/hr 43,353 54,536 65,825 77,208 88, , , ,528 EN9060e/9160e Entering Water Temperature (F) Air Side Performance Flow cfm 2000 Entering Air Dry Bulb F 70 Entering Air Wet Bulb F n/a Delivered Air Dry Bulb F Delivered Air Wet Bulb F n/a Face Velocity FPM Air Side Pressure Drop inwg 1.85 Water Side Performance Entering Water Temperature Return Water Temperature F Number of Circuits F 4 Flow Rate gpm 5 Water Pressure Drop ft Liquid Velocity FPS 1.4 Heat Output Btu/hr 48,461 60,997 73,664 86,449 99, , , ,588 July 2011 Page 32 of 37
33 July 2011 Page 33 of 37
34 14 ECM Speed Settings The enerboss control enables field selection of 12 heating speeds and 12 cooling speeds on EN400, 500, 700, and 900 series Enerboss. The control toggle switches SW1 and SW2 are used. The table below outlines the speeds available. Only select one tap in each group. Powering down of the Enerboss is necessary when changing heat or cool taps. Adjust taps can be changed while the unit is running SERIES DIP SWITCH SPECIFICATION MODELS EN4018i, EN4018e EN4118i, EN4118e EN4024i, EN4024e EN4124i, EN4124e T-STAT MODE HEAT COOL TAP # A B C all off A B C all off ADJUST TAP # A B C A B C A B C A B C A B C A B C A B C A B C denotes Factory Default Speeds * Continuous/Circulation speed is a percentage of Cooling speed. Adjustments to cooling affect Circulation according to the table values * All adjust taps off = A July 2011 Page 34 of 37
35 T-STAT MODE TAP # ADJUST TAP # EN5018i, EN5018e EN5024i, EN5024e EN5030i, EN5030e EN5036e, EN5136e EN5118i, EN5118e EN5124i, EN5124e EN5130i, EN5130e 5000 SERIES DIP SWITCH SPECIFICATION MODELS A A B C A B B HEAT C A C B C A all off B C A A B C A B B COOL C A C B C A all off B C DEFAULT VALUES * VALUES ABOVE 1200 CFM AND BELOW 300 CFM MAY BE CLIPPED TO A LOWER/ER * Continuous/Circulation speed is a percentage of Cooling speed. Adjustments to cooling affect Circulation according to the table values * All adjust taps off = A 7000 SERIES DIP SWITCH SPECIFICATION MODELS EN7024i, EN7024e EN7030i, EN7030e EN7036e EN7124i, EN7124e EN7130i, EN7130e EN7136e T-STAT MODE TAP # ADJUST TAP # A A B C A B B HEAT C A C B C A all off B C A A B C A B B COOL C A C B C A all off B C DEFAULT VALUES * VALUES ABOVE 1200 CFM AND BELOW 300 CFM MAY BE CLIPPED TO A LOWER/ER * All adjust taps off = A July 2011 Page 35 of 37
36 9000 SERIES DIP SWITCH SPECIFICATION MODELS EN9048e EN9148e EN9060e EN9160e T-STAT MODE HEAT COOL TAP # A B C all off A B C all off ADJUST TAP # A B C A B C A B C A B C A B C A B C A B C A B C DEFAULT VALUES * All adjust taps off = A July 2011 Page 36 of 37
37 15 WARRANTY YOUR Enerboss TRANSFERABLE WARRANTY Should your Enerboss cease to function within Five (5) years of the date of original purchase due to defective material of workmanship of the product, NU-AIR Ventilation Systems Inc. will supply a new or rebuilt part FOB factory to replace the defective part. Delivery, installation, and labor cost would be your responsibility. Lifetime Core Warranty If the aluminum or Polypropylene core in your NU-AIR Heat Recovery Ventilator fails due to a defect in material or workmanship NU-AIR Ventilation Systems Inc. will supply a new core FOB factory to replace the defective part. Delivery and labor costs are your responsibility. (There is a two year warranty on our latent core) Warranty Limitations The above warranty does not cover damage to the unit while in your possession (other than damages caused by defective parts or material) due to the following: 1) improper installation or unreasonable use of unit: 2) failure to provide reasonable and necessary maintenance. If the unit is put to commercial use or application other than consumer use, warranty is for a period of one (1) year. This warranty does not cover water heaters, instantaneous water heaters, boilers or condenser units supplied or used with the Enerboss. See water heater, boiler or compressor manufacturer's warranty. P.O. Box Nelson St., Windsor, NS B0N 2T0 Tel: (902) Fax: (902) nuair@nu-airventilation.com Website: July 2011 Page 37 of 37
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