CCP 03-31-2003 - Laserfiche WebLink

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]. ~~ il....-~2~ ] J ~ J J D o o. o o o u u u U. U r) U Functional Test AIR HANDELlNG UNIT Project: Arden Hills City Hall Equipment Tag: AHU-3 Party filling out this form & witnessing Grea Zemechel Date of test 29 JAN 03 Air handling unit number 3 is a single zone unit that provides air to the basement Community Room area. This unit resets its discharge air temperature between 550 and 950 based on the zone temperature set point that can be adjusted at the local thermostat. The item that makes this unit different from air handling unit 2 is that the community area has radiation heating along the outside walls. The operation of the fin tube radiation for this space is not clearly defined in control section 15950. The radiation is now being controlled to a 7CJ> set point outside of the slider on the local thermostat. The current sequence is if the zone temperature drops below 700 the radiation valve is driven open 100%. When the zone temperature raises above 720 the radiation valve is closed 100%. The zone would be better served if the control of the radiation valve was incorporated into the thermostat slider set point. This unit is not operating according to the original design specifications as described in section 3.10 in control section 15950. Furthermore, the current operation of the unit does not match the sequence of operation as described in the as-built drawings delivered to the owner from the controls contractor. This unit has a control-wiring problem that could potentially damage the equipment and should be corrected as soon as possible. Refer to the functional test results for this unit and the low temperature protection device section. Please see this section for further information on all observations.