ERV Energy Recovery Ventilators Installation, Operation and Maintenance Instructions Manual Capacity: 400 to 600 cfm Model: ERV500i/e ©2012 Venmar CES Inc.
Table of Contents Nomenclature.......................................................................................................................................................................3 Safety Considerations..........................................................................................................................................................5 General Information.....................................................................................................................
Nomenclature ERV500i Nomenclature (400–700 cfm) 1 2 3 4 5 6 1. FROST CONTROL D – Recirc defrost1 E – Exhaust only2 C – Non-defrost N – Non-defrost, no wall control compatibility 2. VOLTAGE/SPEED A – 120/1/60 3. INTERNAL PROTECTION 1 – 1” insulation, single wall 2 – 1” insulation, double wall 4. SENSOR CONTACTS W – Wheel rotation sensor3 X – No sensor 5. EXTERNAL FINISH S – Standard galvanized package W – White prepaint package 7 8 9 10 10. ENERGY RECOVERY 1 – Aluminum wheel, no purge 9.
ERV500e Nomenclature (400–700 cfm) 1 2 3 4 5 6 7 8 9 10 11 12 13 1. FROST CONTROL E – Exhaust only1 C – Non-defrost N – Non-defrost, no wall control compatibility 2. VOLTAGE/SPEED B – 208–120/1/60 - one-speed2 C – 230–120/1/60 - one-speed2 3. INTERNAL PROTECTION 1 – 1” insulation, single wall 2 – 1” insulation, double wall 4. SENSOR CONTACTS W – Wheel rotation sensor3 X – No contacts, no sensor 5. EXTERNAL FINISH G – Grey prepaint package 6.
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.
In cold climates (−5°F [−20°C] design), the unit must be mounted in a dry area (not exceeding 30% RH) to avoid condensation on the exterior of the cabinet during winter operation. Alternatively, accommodation must be made for condensation on the cabinet exterior. Do not mount units in an area where exposure to hot chimneys, electrical panels or other hazards will occur. A mounting location close to an exterior partition will minimize the length of insulated ductwork required.
Rigging and Placing the Unit (ERV500e only) Inspect the exterior and interior of the equipment for damage. Ensure there is no damage to internal components such as fans, motors, dampers, enthalpy wheel, insulation and structures. File a claim with the shipping company if the unit is damaged. Important The hoods for these units are not installed from the factory and must be installed on site. They can be installed prior to rigging the unit or after the unit is installed.
Systems Integration Forced Air System When the unit is installed in conjunction with a forced air system, the air handler and the network of ducts associated with it are used to distribute fresh air inside the building. If this type of system is used, the main fan of the air handler must operate continuously when the unit is on. Fan interlock can be connected in the unit control box to the integrated control board terminals J3-1 and J3-2.
disconnect switch must use a liquid-tight connector between the disconnect switch and the outside panel of the unit eliminating any water penetration into the control box. A wiring diagram is located on the control box lid inside of the unit. The low voltage connection runs through the roofcurb and roof opening to the bottom panel. Low voltage remote wiring terminal is located inside the unit on the control box. Installer must provide wiring for the controls that may be supplied optionally.
Frost Control The unit functions are controlled by integrated unit controls including recirculation/exhaust only defrost (optional). In cold temperatures, frost control cycles will remove frost from the enthalpy wheel to maintain proper operation. This removal of frost occurs when a damper closes the outside air port and allows room air to circulate through the enthalpy wheel and back to the vented room.
Flow control dampers should be installed downstream from the FMS so flow through the FMS is not disturbed. Dampers can then be adjusted to equalize flow rates in the ducts. Setting Flow Rate Flow rates should be balanced with units operating on high speed. A damper must be used to establish the minimum duct pressure required so fans do not operate in overload regions. Set the dampers to establish the minimum duct pressure required. Further adjust the dampers to reduce flow to the desired, balanced rate.
Testing and Replacement of the Damper Actuator ! Warning Disconnect the main power switch to the unit before performing service and maintenance procedures. After disconnecting the power from the unit, determine if the actuator is defective. Disconnect the 24V power source. Connect the actuator directly to a 24V power source with an appropriate cable. If the damper operates correctly, the problem is either in the wiring connections or main circuit board. If the actuator does not work, it must be replaced.
Warning ! Disconnect the main power switch to the unit before performing service and maintenance procedures. To remove the supply blower, unscrew the four wing nuts used to fasten the blower assembly to the middle shelf of the unit. Slide the blower assembly out of the unit. Figure 9: Remove supply blower Cassette Removal After disconnecting the power from the unit, disconnect the two three-wire connectors located on the metal frame of the cassette assembly.
! Warning Disconnect the main power switch to the unit before performing service and maintenance procedures. Using a 7/16” nut driver, remove the four ¼” bolts holding the cassette beam to the cassette frame. The cassette beam can now be removed and placed aside to re-install later. Install the new brush seals so that the bristles come in contact with the cassette. Reverse the procedures above to re-install the brush seals and the air filter guide.
Appendix A: Roofcurb Detail SECTION A-A Unit 3/8” [10] gasket (supplied with curb) Wood nailer A A Supply air Return air Overhang: 3” [76] Unit baserail Counter flashing (field supplied) Roofing felt (field supplied) Cant strip (field supplied) Rigid insulation (optional) Roofing material (field supplied) 2.375” [60] 17.500” [445] 14.500” [368] 5.500” [140] 64.000” [1,626] 15.250” [387] 1.500” typ. [38] 61.000” [1,549] 15.000” [381] 1.500” typ.
vces-ERV-iom-1A – ERV500i/e 2.750” [70] 4.500” [114] 5.250” [133] Supply air opening 4.000” [102] LEFT VIEW 5.750” [146] Return air opening Supply air 24.000” [610] Low voltage connection (leave 16” [406] in front for access) Electrical connection box 8.000” [203] Return air 8.000” [203] 14.000” [356] BOTTOM VIEW FRONT VIEW 58.000” [1,473] Supply fan, control box, filter, cassette access panel 52.000” [1,321] 14.000” [356] 1.500” [38] 54.000” [1,372] TOP VIEW 23.
Figure B2: ERV500e unit dimensions vces-ERV-iom-1A – ERV500i/e 17 17.843” [453] 7.831” [199] LEFT VIEW 24.000” [610] 23.000” [584] Exhaust air 7.100” [180] 19.981” [508] Field power supply 4.481” [114] A 6.776” [172] 24.000” [610] Exhaust air hood 15.500” [394] 27.000” [686] 6.100” [155] Exhaust air 12.380” [314] 3.810” [97] 10.257” [261] 4.983” [127] 5.310” [135] Air return bottom SECTION VIEW AA A B 14.000” [356] A 30.831” [783] RIGHT VIEW 6.047” [154] 5.
Appendix C: Hood Installation and Rigging Detail A See Detail A Screw: #10 x 3/4 Detail B Male Black Female Female See Detail B Black Male White White Figure C1: ERV500e hood installation Spreader bars Note: Remove all packaging before beginning to rig the unit onto the installed roofcurb.
Appendix D: Minimum Distance Requirements and Typical Installation Exhaust air from space Min. 36” [914 mm] Flow measuring station (FMS) Balancing damper Flexible duct connection Supply air to space Min. 36” [914 mm] Min. 12” [305 mm] Exhaust air to outside Min.
Appendix E: Components 1 2 5 10 7 11 3 6 Item 1 2 3 4 5 6 7 8 9 10 11 4 9 8 Description Supply blower Supply blower motor Exhaust blower Exhaust blower motor Control box Supply filter Exhaust filter Damper actuator Intake damper Enthalpy wheel Wiper seal Some unit components listed above are optional. Consult the unit nomenclature for standard and optional components.
Appendix F: Equipment Data Table F1: ERV500 Equipment Data ERV500i ERV500e Rated airflow (cfm) 559 cfm @ 0.5” w.g. 507 cfm @ 0.50” w.g. Shipping weight 320 lbs [145 kg] 320 lbs [145 kg] Shipping dimensions (L x W x H) 57.5” x 24.75” x 24” [1,461 x 629 x 610 mm] 68” x 27” x 23” [1,727 x 686 x 584 mm] Fans Impeller (forward centrifugal) Motor 8.5” diameter x 3.5” width [216 mm diameter x 89 mm width] ¼ hp supply and exhaust, two-speed on high 8.5” diameter x 3.
Appendix G: 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 1 BLACK 2 RED WALL CONTROL RED 2 3 OCCUPIED TIMER/ SENSOR 4 TO AC UNIT COIL (24 VAC) 5 12 LOW 13 COMMON 14 HIGH 15 DIRTY FILTER INDICATOR 16 (−) 24 VAC GREEN 11 YELLOW 12 LOW 13 COMMON 14 HIGH 15 DIRTY FILTER INDICATOR 16 (1.
Wheel Rotation Sensor ERVs can be equipped with a wheel rotation sensor option. This option cannot be ordered for a non-defrost unit. This option cannot be used in conjunction with a digital wall control and must be ordered with a control board. With the wheel rotating, the wheel rotation sensor board activates the relay coil and closes the ‘NO’ (normally open) set of contacts across the occupied/timer sensor contacts (pin 3 and 4), allowing the unit to operate.
Unoccupied Recirc Contacts (ERV500i only) 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. an alarm condition is activated.
Appendix H: Troubleshooting Table H1: ERV500i/e Troubleshooting Problem Unit will not turn on. Unit will not turn off. Cause Solution External wiring not connected. Check external wiring. Internal wiring not making contact. Check the wiring in the control box. Occupied/unoccupied control circuit is open. Close circuit. Check if high or low speed control contacts are closed on the terminal strip. Check filters and enthalpy wheel for blockage. Check balance of airflow. Install post heat module.
info@venmarces.com www.venmarces.com Venmar CES Inc. has a policy of continuous improvement and reserves the right to change design and specifications without notice. ©2012 Venmar CES Inc.
