Indoor ERV Energy Recovery Ventilators Installation, Operation and Maintenance Instructions Manual Capacity: 700 to 4,000 cfm Model: ERV1000i, ERV1500i, ERV2000i, ERV3000i ©2012 Venmar CES Inc.
Table of Contents Nomenclature.......................................................................................................................................................................3 Safety Considerations..........................................................................................................................................................7 General Information.....................................................................................................................
Nomenclature ERV1000i Nomenclature (700–1,400 cfm) 1 2 3 4 5 6 7 8 1. FROST CONTROL D – Recirc defrost1 E – Exhaust only2 V – VSD frost prevention, no wall control compatibility W– VSD frost prevention C – Non-defrost N – Non-defrost, no wall control compatibility3 2. VOLTAGE/SPEED A – 120/1/60 - two-speed4 B – 208–120/1/60 - two-speed4/5 C – 230–120/1/60 - two-speed4/5 D – 208/3/60 - one-speed4 E – 230/3/60 - one-speed4 F – 460/3/60 - one-speed4 3.
ERV1500i Nomenclature (800–2,000 cfm) 1 1. FROST CONTROL D – Recirc defrost1 E – Exhaust only2 V – VSD frost prevention, no wall control compatibility W– VSD frost prevention M– Preheat - 8 kW, two-stage3 O– Preheat - 8 kW, four-stage3 P – Preheat - 8 kW, SCR3 Q– Preheat - 14 kW, two-stage3 R – Preheat - 14 kW, four-stage3 S – Preheat - 14 kW, SCR3 T – Preheat - 20 kW, two-stage3 U – Preheat - 20 kW, four-stage3 Y – Preheat - 20 kW, SCR3 C – Non-defrost N – Non-defrost, no wall control compatibility4 2.
ERV2000i Nomenclature (1,200–2,800 cfm) 1 1. FROST CONTROL D – Recirc defrost1 E – Exhaust only2 V – VSD frost prevention, no wall control compatibility W – VSD frost prevention C – Non-defrost N – Non-defrost, no wall control compatibility3 2. VOLTAGE/SPEED B – 208–120/1/60 - one-speed4 C – 230–120/1/60 - one-speed4 D – 208/3/60 - one-speed E – 230/3/60 - one-speed F – 460/3/60 - one-speed G – 575/3/60 - one-speed N – 208/3/60 - VFD9/10 O – 230/3/60 - VFD9/10 P – 460/3/60 - VFD9/10 3.
ERV3000i Nomenclature (2,000–4,000) 1 2 3 4 1. FROST CONTROL D – Recirc defrost1 E – Exhaust only2 V – VSD frost prevention, no wall control compatibility W – VSD frost prevention M – Preheat - 20 kW, two-stage3 O – Preheat - 20 kW, four-stage3 P – Preheat - 20 kW, SCR3 Q – Preheat - 30 kW, two-stage3 R – Preheat - 30 kW, four-stage3 S – Preheat - 30 kW, SCR3 T – Preheat - 40 kW, two-stage3 U – Preheat - 40 kW, four-stage3 Y – Preheat - 40 kW, SCR3 A – Preheat w/ unocc.
Safety Considerations Warning, Caution and Important notes appear throughout this manual in specific and appropriate locations to alert Installing Contractors and maintenance or service personnel of potential safety hazards, possible equipment damage or to alert personnel of special procedures or instructions that must be followed as outlined below. Warning ! Identifies an instruction which, if not followed, might cause serious personal injuries including possibility of death.
Mount Unit Ceiling Mount (ERV1000i and ERV2000i only) The unit must be mounted level and may be hung with threaded rod (field supplied) through the protruding frame at the base of the unit. Hole centers are shown in the overall dimension drawings in Appendix C. Do not block access to panels as indicated in Appendix B. Rubber or seismic vibration isolation may be required in some regions (field supplied and specified). Important The manufacturer recommends that the ERV1500i and ERV3000i be floor mount only.
Install Access Panels Handles for access panels are provided but must be installed on site. Handles and fasteners are secured on the top of the unit. Remove from packaging and install according to the drawing below. Access panel Metal or polyamide handle #10 x ¾ Screw Figure 2: Access panel Remove All Internal Packaging Remove access panels and all packaging from the unit. Note that there is packaging for wheel support during shipping (ERV1000i and ERV2000i). Removal of all this packaging is critical.
Electrical Connections ! Electrical Requirements Warning Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. Failure to follow this warning could result in the installer being liable for personal injury of others. Location of wire connections required are shown in Appendix C. A junction box or disconnect switch must be field supplied where line voltage connections are made.
Preheat Frost Prevention VSD (Variable Speed Drive) Frost Prevention Preheat frost prevention is an outdoor air temperature controlled function that allows for continuous ventilation by ensuring a minimum entering air temperature (into the enthalpy wheel) of 5°F [−15°C]. There are three fixed kW capacity options available. For preheat capacity requirements, please use applicable ASHRAE formulas. Preheat frost prevention can have two-stage, four-stage or SCR control.
Dampers can then be adjusted to equalize flow rated in the ducts. Another method of airflow balancing is to measure the pressure drop across the enthalpy wheel and correlate it to an airflow. in overload regions. For belt drive units, adjust the motor sheave for the best fan speed. Set the dampers to establish the minimum duct pressure required. Further adjust the dampers to reduce flow to the desired, balanced rate. Setting Flow Rate Flow rates should be balanced with units operating on high speed.
Annual Maintenance ! Warning Disconnect the main power switch to the unit before performing service and maintenance procedures. Annual maintenance should include: Rotor Air Filters Brush.seal Replace medium efficiency filters. Replace high efficiency filters in the ERV3000i. For more detail on replacing filters, see the Air Filters section under Quarterly Mainteance. Interior of Unit Wash the foil faced insulation surfaces with a soft cloth and mild cleaning solution.
Motor and Blower Service ! Warning Disconnect the main power switch to the unit before performing service and maintenance procedures. The belt tension is adjusted by positioning the rotating motor base plate (see Figure 10). Set adjustment for proper belt tension. The fan RPM can be adjusted to achieve the design airflow by setting the adjustable sheave on the motor shaft. The pulley set screw torque setting is 110 in-lbs to 130 in-lbs.
Cassette Service ! Warning Disconnect the main power switch to the unit before performing service and maintenance procedures. Perimeter Seal Replacement Caution When handling the enthalpy wheel, ensure not to damage the face of the wheel. To replace the perimeter seal, the enthalpy wheel must be removed from the frame. Disconnect the service connector to the drive motor of the enthalpy wheel cassette. Remove the cassette from the unit and stand the assembly on the floor.
Appendix A: Equipment Data Table A1: Indoor ERV Equipment Data – ERV1000i, ERV1500i, ERV2000i, ERV3000i ERV1000i ERV1500i ERV2000i ERV3000i Shipping weight 525 lbs [239 kg] 600 lbs [273 kg] 725 lbs [330 kg] 1,185 lbs [539 kg] Net weight Shipping dimensions (L x W x H) Ductwork 500 lbs [227 kg] 74.00” x 44.00” x 28.00” [1,880 x 1,118 x 711 mm] 575 lbs [261 kg] 700 lbs [318 kg] 55.75” x 42.75” x 49.83” 94.00” x 52.00” x 36.
Appendix B: Typical Installation and Minimum Distance Requirements Supply to space Balancing damper 2 D ft m in. Exhaust outside Backdraft damper Flow measuring station 5 D ft m in. Exhaust from space inimum cf in. m Intake from outside Clearance required to remove components for maintenance Balancing damper 2 D ft m Straight duct section required to achieve good airflow rates. (see Section 3.3) Minim um dis tan 8 ft. or accord ce between ing to e local b xterior hoo ds uilding codes in.
vces-ERV-iom-3B – Indoor ERV 1.750” [44] 7.250” [184] 12.000” [305] Exhaust air opening 8.000” [203] 18.750” [476] LEFT VIEW 8.000” [203] Line power Junction box 4.750” x 4.750” [121 x 121] 7.250” [184] C Supply fan control box access panel 22.500” [572] Low voltage connection (leave 16” [406] in front for access) Supply air opening 8.250” [210] 12.000” [305] 0.750” [19] Hanging mount hole Ø 0.
Figure C2: ERV1500i unit dimensional drawing vces-ERV-iom-3B – Indoor ERV 19 8.068” [205] 14.187” [360] 10.250” [260] 44.290” [1,125] OA-E 14.000” [356] LEFT VIEW EA-E 9.190” [233] Exhaust blower access panel 43.190” [1,097] 3.165” [80] 26.669” [677] 15.500” [394] C 21.500” [546] 9.440” [240] A 7.450” [189] 3.425” [87] 55.754” [1,416] Cassette, filter, supply blower access panel 53.347” [1,355] TOP VIEW SA-T 10.500” [267] RA-T 13.500” [343] 2.319” [59] BOTTOM VIEW 16.
Figure C3: ERV2000i unit dimensional drawing vces-ERV-iom-3B – Indoor ERV 20 12.750” [324] 14.000” [356] Exhaust air opening 10.000” [254] 10.000” [254] LEFT VIEW 7.625” [194] 14.000” [356] 13.251” [337] 5.380” [137] 7.625” [194] C Supply fan control box access panel 36.500” [927] Low voltage connection (leave 16.000” [406] in front for access) 5.250”[133] Supply air opening 10.750” [273] 4.000” 2.000” [102] [51] Field power supply Hanging mount hole Ø 0.
Figure C4: ERV3000i unit dimensional drawing vces-ERV-iom-3B – Indoor ERV 21 Exhaust blower access panel 24.773” [629] OA-E 14.000” [356] LEFT VIEW EA-E 13.250” [337] 11.375” [289] 7.806” [198] 3.625” [92] typical bottom flange 17.582” [447] 29.000” [737] 29.000” [737] 18.777” [477] 7.226” [184] 4.901” [124] C 3.042” [77] 1.918” [49] 15.625” [397] A 4.680” [119] 13.321” [338] 8.590” [218] OA-S 26.500” [673] OA-T EA-T Coil section access panel 6.166” [157] 7.
Appendix D: Components 1 3 2 15 6 9 4 7 10 12 13 14 11 Description Housing Fan Fan motor Supply filter set – two per set Exhaust filter set – two per set Pressure differential switch (dirty filter) Enthalpy wheel Wheel drive motor Wheel drive pulley Wheel drive belt Wheel perimeter seal Wheel wiper seal Defrost damper actuator Defrost damper Control box Note: Some unit components listed above are optional. Consult the unit nomenclature for standard and optional components.
1 4 2 5 6 10 9 17 3 12 7 15 13 16 8 14 11 Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Description Housing Fan Fan pulley Belt Adjustable sheave Fan motor Enthalpy wheel Wheel drive motor Wheel drive pulley Wheel drive belt Wheel perimeter seal Wheel wiper seal Defrost damper actuator Defrost damper Supply filter set – two per set Exhaust filter set – two per set Pressure differential switch (dirty filter) Note: Some unit components listed above are optional.
Appendix E: Terminal Control Diagrams Wall Control Connection Occupied Timer/Sensor Connection Two types of remote wall controls are available: Occupancy control is achieved by connection to the terminal interface shown below. These terminals require a dry contact which could be provided by a number of types of controls such as a timer, light sensor, occupancy sensor, Building Management System or other. The unit will not operate unless these contacts are closed!! 1.
CONTROL CONTACTS CONTROL CONTACTS 1 THERMOSTAT (FIELD SUPPLIED) R GREEN 11 WALL CONTROL RED 2 YELLOW 12 LOW 13 3 OCCUPIED TIMER/ SENSOR 4 TO AC UNIT COIL (24 VAC) 5 (−) 24 VAC COMMON 14 HIGH 15 6 (+) 24 VAC DIRTY FILTER INDICATOR 16 7 (ERV UNITS) TO AC UNIT COIL (GND) 8 + − LOW HI FIELD WIRED TERMNIALS B RED OCCUPIED TIMER/ SENSOR 5 18 19 6 (+) 24 VAC 7 (ERV UNITS) ENTHALPY 20 8 9 Use of 24 VAC circuit requires isolating contacts (ex.
Wheel Rotation Sensor used as Low Temperature Control (Wheel Failure) Wheel Rotation Sensor ERVs can be equipped with a wheel rotation sensor board but must be ordered with a control board. On power up of the unit, the wheel rotation sensor board’s relay coil is activated and closes the ‘NO’ set of contacts that are wired to the ‘Occ/Unocc’ control terminals on the unit. In this condition, the unit is allowed to operate in a normal occupied state.
Unoccupied Recirc Contacts CONTROL CONTACTS 1 GREEN 11 YELLOW 12 LOW 13 COMMON 14 HIGH 15 On recirc defrost units, an unoccupied recirc control can be achieved by connection to the terminal interface shown below. These terminals require a 24 VAC signal which could be provided by a timer, thermostat or other. Closure of these terminals will cause the unit to go into a recirc mode where the supply fan runs on high speed and the exhaust fan stops. DIRTY FILTER INDICATOR 16 Important (1.
Smoke Detector Locate in a normally occupied area of premises. Recommended for compliance to NFPA-90A and IMC code 606. ERVs can be equipped with a duct mount smoke detector which will monitor the air when passing through the duct system into the ERV. When sufficient smoke is detected, an alarm condition is activated. By connecting the occupied timer/sensor contacts to the ‘NC’ alarm auxiliary contacts on the duct sensor, an alarm condition will open the auxiliary contact and stop operation of the ERV.
Appendix F: Added Pressure Drop Charts Table F1: Added Pressure Drop for High Efficiency Filters Airflow (cfm) vces-ERV-iom-3B – Indoor ERV Resistance (in. w.g.) 2,000 0.28 2,100 0.29 2,200 0.30 2,300 0.32 2,400 0.34 2,500 0.36 2,600 0.38 2,650 0.39 2,700 0.40 2,800 0.45 2,900 0.47 3,000 0.49 3,100 0.52 3,200 0.55 3,300 0.59 3,400 0.61 3,500 0.63 3,600 0.65 3,700 0.68 3,800 0.72 3,900 0.75 4,000 0.
Appendix G: Troubleshooting Table G1: Troubleshooting – ERV100i, ERV1500i, ERV2000i, ERV3000i Problem Cause Solution Check external wiring. Unit will not turn on. Unit will not turn off. Air from supply diffusers too cold. Unit makes an annoying noise. Enthalpy wheel freezing. Occupied timer contacts open. Check the control board for power. Check if high or low speed control contacts are closed External terminal strip wiring. on the terminal strip. Check filters and heat exchanger for blockage.
Appendix H: Electrical Data Table H1: Blower Motor Full Load Amperage (FLA) – ERV1000i hp 120/1/60 7.7 ½ 208/1/60 3.6 230/1/60 3.6 Voltage 208/3/60 3.0 230/3/60 3.0 460/3/6 1.5 575/3/60 N/A 230/3/60 2.2 2.7 3.0 4.4 5.8 8.2 12.8 460/3/6 1.1 1.4 1.5 2.2 2.9 4.1 6.6 575/3/60 0.9 1.1 1.2 1.8 2.3 3.3 5.2 230/3/60 2.2 460/3/6 1.1 575/3/60 0.9 Table H2: Blower Motor Full Load Amperage (FLA) – ERV1500i, ERV2000i, ERV3000i hp 120/1/60 9.0 11.0 14.0 20.4 28.0 31.0 N/A ½ ¾ 1.0 1.5 2.0 3.0 5.
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