NTI GF 200 Installation Manual

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NTI GF 200 Installation Manual Manual pdf 23 page image

3.7 Connecting the Power SupplyWARNINGImproperly connecting the power supply canresult in electrical shock and electrocution.Follow all applicable electrical codes of the localauthority having jurisdiction. In the absence ofsuch requirements, follow the latest edition of theNational Electrical Code (NFPA 70) in the USA or thelatest edition of CSA C22.1 Canadian Electrical CodePart 1 in Canada. Connecting the power supplyshould be performed only by a licensed professional.When connecting the power supply, follow theseguidelines:● Do not connect the electric supply until allplumbing and gas piping is complete and theappliance has been filled with water.● Do not connect the appliance to a 220-240 VAC power supply. Doing so will damage theappliance and void the warranty.● This appliance must be wired directly. It isrecommended that a power switch be installedbetween the breaker and the appliance tofacilitate end-user maintenance and servicing.● Connect the appliance to a 110-120 V AC circuitat 60 Hz, with a minimum circuit ampacity (MCA)of 15 A, and a maximum circuit breaker size of 20A, as per the rating plate.● Ensure that the appliance is electrically groundedvia the GND circuit on the barrier strip. Do notattach the ground wire to either the gas or thewater piping as plastic pipe or dielectric unionsmay prevent proper grounding.● If there is a power failure in cold weather areas,the freeze prevention system in the appliancewill not operate and may result in freezing ofthe heat exchanger and or coil. In cold weatherareas where power failures are common, youmust completely drain the appliance to preventdamage if the power will be off for any extendedperiod of time. A battery back-up (available atmost computer retailers) may be used to supplyhot water during periods of power outages.Damage caused by freezing is not covered underwarranty.3.8 Setting the DIP SwitchesThe appliance has two installer-serviceable DIPswitch locations: on the front panel, and on theinterface board, mounted on the frame of the PCB.3.8.1 Interface Board DIP Switches (H2Air)The four DIP switches on the interface boardconfigure the settings governing central heatingoperation. These configurations are set at thefactory (OFF ON OFF OFF) and should not bechanged.However, should absolute DHW priority be desired,such that any DHW demand disables any centralheating operation for the duration of the demand,DIP switch #2 may be set to OFF.3.8.2 Front Panel DIP SwitchesThe two sets of DIP switches on the front panelconfigure the appliance pump & recirculation,display, well pump, storage tank & solar system,lime alarm, high altitude, cascade venting and gastype settings. Some of these configurations areset at the factory and should not be changed. Thefollowing tables describe the functions of the DIPswitches and their settings:1 2 3 4 5 6 7 8 9 10ON ON22