Bard I36Z1-A Installation Instructions Manual

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Bard I36Z1-A Installation Instructions Manual Manual pdf 29 page image

Manual 2100-578EPage 29 of 41I-TEC COMMERCIAl ROOMVENTIlATOR SYSTEMGENERAl DESCRIPTIONThe I-TEC Commercial Room Ventilator (CRV) isdesigned to be used with all Bard I-TEC models. Theonly intent of this device is to provide the requiredventilation by delivering fresh air to meet I.A.Q. (IndoorAir Quality) requirements. In the installed application,this system also includes exhaust provisions whichare balanced with the intake air to maintain buildingpressurization requirements of ASHRAE 62.1 Standard.Ventilation is accomplished with (2) blower/motor assemblies for maximum ventilation at lowsound levels. The intake and exhaust blowers areprogrammed independently and are balanced tomaintain a slight positive pressurization in accordanceto ASHRAE 62.1 Standard.The I-TEC CRV is also provided with filters to reducethe required service needed and to further improve theI.A.Q. The exhaust air blowers and intake air blowersare protected by two (2) throw away filters. Both areaccessible without the need for tools.CONTROl WIRINGThe I-TEC CRV comes wired from the factory set to450 CFM of ventilation. Care must be taken whendeciding how to control the operation of the ventilator.When designing the control circuit for the ventilator, thefollowing requirements must be met.1. The indoor blower must be run whenever the I-TECCRV is run.2. Select and configure the correct CFM ventilationlevel that the I-TEC CRV needs to operate andconfigure the system to this level following laterinstructions within this section. Over ventilatingserves no useful purpose and significantly affectsthe overall efficiency of the heat pump system.System operating costs would also increase.3. Run the I-TEC CRV only during periods when theconditioned space is occupied. Running theventilation during unoccupied periods wastesenergy, decreases the expected life of the CRV,and can result in large moisture buildup in thestructure. Running the CRV when the structure isunoccupied allows moisture to build up in thestructure because there is little or no cooling load.Thus, the air conditioner is not running enough toremove the excess moisture being brought in. Usea control system that in some way can control thesystem based upon occupancy.RECOMMENDED CONTROl SEqUENCESSeveral possible scenarios are listed below:1. Use a programmable electronic thermostat withauxiliary terminal to control the CRV based ondaily programmed occupance periods. Bardmarkets and recommends Bard Part #8403-060programmable electronic thermostat.2. Use Bard CompleteStat™ that incorporatestemperature, humidity and occupancy control withlearning capability into a single device. Noprogramming required.3. Use a DDC control system to control the CRV basedupon a room occupancy schedule to control the CRV.4. Tie the operation of the CRV into the light switch. Thelights in a room are usually on only when occupied.5. Use a manual timer that the occupants turn toenergize the CRV for a specific number of hours.6. Use a programmable mechanical timer to energizethe CRV and indoor blower during occupiedperiods of the day.NOTE: The ventilation package comes with a blowerinterlock function, but is disabled when it is shipped fromthe factory in case you do not utilize a thermostat with anoccupancy output, or a occupancy sensor and must tie “A”terminal to “G” terminal to drive the ventilation package. Ifyou do have a thermostat or control that does drive occupancyoutput, you will need to remove the tape from the orange wirelocated in the low voltage terminal box, and connect it to the“G” terminal to activate this function. (See Figures 11-13.)SETTING THE VENTIlATION CFM lEVElSThe I-TEC CRV has four pre-set levels of ventilationCFM available. These are 300, 375, 450 and 525 CFMof ventilation air. The I-TEC CRV is shipped from thefactory set on the 450 CFM ventilation level. To changebetween these four different levels of provided ventilationCFM, first refer to Figure 15 to look up the correspondingCFM needed for the intake and exhaust blowers to meetthe design criteria and determine which “speed/wirecolor” is needed. Then, perform the following steps.1. Open front swinging doors of main unit (by poppingfront door latches).2. Throw main power disconnect to the “OFF ”position to eliminate risk of injury or death due toelectrical shock.3. Remove six (6) screws holding front CRV door inplace (See Figure 16).4. Locate “Brown Wire with White Trace” that hasa black terminal on the end where it connects tothe terminal strip (See Figure 15).5. Move “Brown Wire with White Trace” to thecorresponding CFM level needed in accordancewith Figure 15.Operating the I-TEC CRV during unoccupied periods canresult in a build up of excess moisture in the structure.8.5002.3361.3701.3702.585 2.585FORM:IN SEVERE INJURY OR AMPUT7961-754-2REMOVE TO DISASSEMBLE, DO NCOLORS:2 BLINKSIN SERIOUS INJURY OR DEATH.DIECUT SHEETEXPOSED MOVING PARTS.FAILURE TO DO SO CAN RESULTELECTRICAL SHOCK CAN RESHI PR. SW./WATER SNSR. FAIL.FAST BLINKELECTRIC POWER SUPPLY ORIN SEVERE INJURY OR AMPUTATION.POWER BEFORE SERVICING.EXPOSED MOVING PARTS.LO PRESS. SWITCH FAILURE1 BLINKWARNINGDISCONNECT THE REMOTE!HAZARD OF ELECTRICAL SHOCK.COMPRESSOR TIME DELAYROSEWHITE BACKGRODISCONNECT THE REMOTEMODIFY FACTORY WIRING.LIGHT7961-754-1DISCONNECT ALL ELECTRICALELECTRIC POWER SUPPLY OR79DESCRIPTIONPHASES INCORRECT, REVESUPPLIES BEFORE SERVICINGIN SERIOUS INJURY OR DEATHGREENDARK ORANGEHI PRESS. HARD LOCKOUTCODEPRESENTSO MAY RESULT IN UNIT DA7961-754-52 UNIT SUPPLY LEADS. DOUNIT TIE PLATEHP. BOARD TROUBLESHOOTING CODESDESCRIPTIONNORMAL OPERATION3 BLINKS4 BLINKSREDCODEWARNING!HAZARD OF ELECTRICAL SHODEFROST MODE ACTIVESLOW BLINKSUPPLIES BEFORE SERVICING.! WARNING WARNING!BRIGHT YELLOW793 PHASE LINE MONITOR CODELIGHT7961-754-4DISCONNECT ALL ELECTRICALUNIT TIE PLATEPHASES CORRECT, Y SIGNREMOVE TO DISASSEMBLE, DO NOTOVERTIGHTEN BOLTS WHEN REPLAOVERTIGHTEN BOLTS WHEN REPLACINGPOWER BEFORE SERVICING.FAILURE TO DO SO CAN RESUELECTRICAL SHOCK CAN RESULTREV. DATE DESCRIPTIONA 11/17/2011 REVISED 2 BLINKS CODE ON #7961-754-4B 11/19/2012 REMOVED LOCKING CAPS TEXT ON 7961-754-3C 10/30/2013 REVISED "4" BLINKS CODE ON 7961-754-4