Harry Taylor HT2000 Installation & Servicing Manual
Also see for HT2000: ManualManualInstallation & servicing manualManualInstallation, service and user manual
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Contents
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21Note (iii)The net efficiency must not be lower than79% for heaters fitted with a modulating orhi/lo burner.In other cases the net efficiency level mustnot be lower than 84%Note (iv)All Cabinet Heaters are test fired and pre-commissioned as part of the manufacturingprocess, if however, during on sitecommissioning the data are found to be notin accordance with the manufacturers data,then the following action is recommended.* Re-check all readings and calculations.* Adjust burner as per manufacturersinstructions.* Consult Harry Taylor of Ashton Ltd.Technical Department.(t) Complete commissioning card andprovide operating instructions for the user,high-light the fact that the manufacturerrecommends that in the interests of safetyand efficiency the heater is serviced on aregular basis only by qualified andcompetent persons.The completed commissioning card must bereturned to Harry Taylor of Ashton Ltd.Service Department immediately after thesatisfactory completion of commissioning,failure to do so can invalidate anysubsequent warranty claim.( u) Set all controls to the requirements of theuser .4.3 Commissioning - air deliverysystem.On free blowing applications the integrity ofthe fastenings on the heater top and outletnozzles must be checked .Final adjustment for the direction of the airflow from the nozzle hoods should be made.Ensure louvres are adjusted outwardsand ensure blades are not resonating andthe hoods should be secured in the requiredposition by drilling through the two holesprovided in the hood outer ring and fastenedin place using self tapping screws.CautionOn ducted applications it is necessary thatthe system is balanced in order to optimisethe efficiency of the heater and the airdistribution and delivery system. Failure tobalance the system can result in fan motoroverloading and premature componentfailure, it can also result in an inefficientheating/ventilation system.(a) Check that the amount of fan producedair volume is in accordance with the heaterspecification, if the volume is too great thefan can be overloaded. Ensure that therunning current is as per that stated on theheater data plate. Alternatively, the staticpressure should be measured at the start ofthe ductwork to confirm that it is within thepermissible tolerance.(b) If the current drawn is greater than thestated running current, in most probabilitythis will be caused by insufficient staticpressure within the ductwork, in which casesystem resistance should be increasedthrough the introduction of a damper placedas close to the start of the ductwork aspossible, thereby resulting in a reduction indrawn current. The damper should beadjusted until the current is in accordancewith that stated on the data plate.(c) If the current drawn is too low the ductoutlet grilles will require opening to reducestatic pressure and increase air volume, ifthis is not the case overheat cut outs can becaused.The Fan Belts must be rechecked oncompletion of commissioning ensuringthat the tension is correct and the pulleysare in alignment4.4 Commissioning - hand over(a) Upon full and satisfactory completion ofcommissioning, a record of commissioninginformation (contact, date, etc) should be leftwith the heater, a copy of which must alsobe forwarded to Harry Taylor of Ashton Ltd.Service Dept. |
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