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Summary of Contents for Nu-Air Enerboss 412C
- Page 1 Enerboss 400C Series Vertical Fan Coil Specifications, Installation, Operation and Maintenance Manual July 5/2011...
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Page 2: Table Of Contents
INSTALLATION ..................3 Locating the Fan Coil ..................3 Framing ....................... 3 Electrical Power Connection ................3 Control and Electrical Connections..............4 Plumbing ......................4 Ducting ........................ 4 COMMISSIONING ................5 Supply Air Balancing ..................5 HRV Balancing ....................5 Water Side Commissioning ................ -
Page 3: Installation
1 INSTALLATION Locating the Fan Coil Clean the floor of debris where the fan coil is to be placed. With the fan coil tipped at the top, feed the risers down to the unit below through the sleeves provided. Solder the mating risers and insulate the remaining copper on the supply and return water risers. -
Page 4: Control And Electrical Connections
ELECTRICAL SPECIFICATIONS Electrical Volts Watts No Electric Back up 120/1 1.5 kW Back up 120/1 1900 CONTROLS POWER CONDUCTOR WIRES DESCRIPTION THERMOSTAT 24 VAC 18 GA HEAT COOL WITH FAN SWITCH DEHUMIDISTAT 24 VAC 18 GA 20-80% MAKE ON RISE TIMERS 24 VAC 18 GA... -
Page 5: Commissioning
1.6.5 HRV Outside Air (Fresh Air from Outside) At the top, right, front of the fan coil a 5” diameter collar is provided. The outside air collar can be specified when ordering to be top or side and can be changed in the field by swapping the cover plate and collar plate. - Page 6 2.1.1 Balancing mode 1 High Speed Balancing: Balancing With all dampers fully open and the exhaust fan speeds at Ports the factory setting, run the fan coil in high ventilation mode. Using a hot wire anemometer or pitot tube and micromanometer measure the air velocity (hot wire) or velocity pressure (micromanometer) in the HRV return and HRV outside air.
- Page 7 2.3.1.2 Exhaust Air High Speed Adjustment From the window in the HRV access door (C), locate the two blue pots on the circuit board. The top pot adjusts the exhaust fan HIGH speed. Turn clockwise to increase and counterclockwise to decrease CFM.
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Page 8: Water Side Commissioning
Water Side Commissioning The coil(s) must be fully charged and free of air. To determine the water flow through the coil and the output of the unit measure the entering and leaving water temperatures and the entering and leaving air temperatures with the fan coil in a call for heat ( or cooling as appropriate). -
Page 9: Thermostat
When the thermostat switch is in Fan ON mode the HRV/ERV runs continuously on low speed, increasing to high speed on call from a timer or optional dehumidistat. When the thermostat switch is in Fan AUTO mode the HRV/ERV is in standby and will provide low volume ventilation only on a call for heat, or will provide high speed ventilation on call from an optional dehumidistat or timer . -
Page 10: Push Button Timers (Optional)
Typical seasonal settings for the dehumidistat dial are as follows: Summer: 80% or OFF Winter: 40-60% Dehumidistat Wiring: Use 2-Conductor low voltage wire. Connect to 24 VAC and Humidity Dehumidistat Settings and Responses 3.2.3 When Thermostat Fan Switch is ON If indoor humidity is below dehumidistat set point the HRV runs in low speed. -
Page 11: Recommended Seasonal Settings
The HRV will be off. Both fans will be off except on call for heat or cooling. When the timer is turned ON the fan coil will be in high ventilation mode. The HRV fan and the main blower will operate in high until the switch is disengaged. Recommended Seasonal Settings Hot, Humid Seasons: 3.2.5... -
Page 12: Maintenance
Repeat every 6 to 12 months. The ERV Core (polymer media) 4.1.4 Remove the energy exchange core as you would an HRV core. Nu-Air polymer cores can be washed or vacuumed Repeat every 6 to 12 months. Page 12 of 29... -
Page 13: Warranty
Delivery, installation, and labor cost would be your responsibility. Lifetime Core Warranty If the 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. -
Page 14: Technical Information
6 TECHNICAL INFORMATION 6.1 Nomenclature Fan Coil Lower Assembly HRV Upper Assembly Cooling Hydronic Return Coil Heating Coil Connections Valve Supply Air HRV Core 2- Pipe 09 3/4 Ton Electric back up BK Back 0 None F Front A-Front 0 No H/ERV 0 none none none... -
Page 15: Coil Data
6.2 Coil Data DETAILED COIL DATA MODLE MODEL MODEL COIL CONSTRUCTION MODLE 409 MODEL 412 MODEL 418 TYPE WATER WATER WATER WATER WATER WATER FIN HEIGHT X FINNED LENGTH 20X10 20X10 20X10 20X10 20X10 20X10 FACE AREA 1.39 1.39 1.39 1.39 1.39 1.39... -
Page 16: 4-Pipe Heating Coil Data
6.3 4-pipe Heating coil data 4-pipe fan coils use a single row coils in a common case with one of the cooling coils listed above. The heating performance of this coil is as follows. 4-PIPE HEATING COIL DATA 20 degree delta 40 degree delta COIL CONSTRUCTION MODLE 409... -
Page 17: Fan Curves
6.4 Fan Curves The room fan coil is usually designed for free air delivery into a room but may be used with minimal ducting having a static resistance of 0.25 inwc or less. The supply fan is powered by an ECM operating in constant CFM mode. The delivered airflow remains relatively constant over varying external static pressures SUPPLY FAN C409... -
Page 18: Outside Air At Low Speed
6.5 Outside Air at Low Speed The flow rate of outside air is a function of the main blower speed reduction from high speed to circulation speed and to a lesser extent the duct system. The low speed outside air flow cannot be adjusted without affecting the high speed flow rate. In most applications the high speed ventilation rate is set during commissioning and the low speed flow is left to float. -
Page 19: Hrv Efficiency
HRV Efficiency CORE OA TEMP OA FLOW EFFECTIVNESS SENSIBLE LATENT POLY 35.0 35.0 ENTHALPY 35.0 35.0 Sound Level Summary Measured at 2.0 m from unit SOUND LEVEL MODEL HIGH HEAT HIGH VENT C409 C412 C418 6.9 Shop Drawings Page 19 of 29... - Page 20 Page 20 of 29...
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Page 25: Electrical
6.10 Electrical No Electric Back up 120/1 1.5 kW Back up 120/1 1900 CONTROLS POWER CONDUCTOR WIRES DESCRIPTION THERMOSTAT 24 VAC 18 GA HEAT COOL WITH FAN SWITCH DEHUMIDISTAT 24 VAC 18 GA 20-80% MAKE ON RISE TIMERS 24 VAC 18 GA SPRING WOUND MECHANICAL COUNT DOWN TIMERS... - Page 26 Page 26 of 29...
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Page 28: Operational States
6.11 Operational States The table below defines the operating state of each device (motor, valve, etc) in the unit for all available inputs. Priority increases from left to right in the tables. 400C Enerboss States DEVICE STATE Blower Priority to high speed calls High A+!Y+!G W+Th<100... - Page 29 400C Fan Coil Page 29 of 29...
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