mCq pCO - Standard + Heat Pump - McQuay

Conditioning: pCO Standard chiller + heat pump User Guide ver. 2.9 02/11/99TimesMost of pCO's control actions will be performed according to programmable time-delays (eg.time-delay before the activation of compressors or of certain alarms so as to ensure longer lifeto the compressors themselves and a well-balanced system management).pCO allows you to set the following time-intervals:- time-delay before starting the second compressor so as to avoid high absorption at start-up(def.10 sec.);- minimum ON routine of the compressor (def. 60 sec.);- minimum OFF routine of the compressor (also after the unit has been switched off viakeypad, def. 180 sec.);- time-delay between two consecutive ON routines of the same compressor to limit the numberof starting routines per hour (def. 360 sec.);- time-delay between the compressor start-up and its capacity-controlled routine or betweentwo capacity-controlled routines (def. 360 sec.);- time-delay before activating the oil differential pressurestat alarm (def. 120 seconds);- time-delay before the activation of the flowmeter alarm during normal activity (def. 3 sec.);- time-delay before the activation of the flowmeter alarm at start-up (def. 10 sec.);- time-delay before stopping the electropump after the unit has been switched off (def. 20 sec.);- time-delay before the intervention of the low pressure pressurestat (def. 40 sec.);- max. pump-down time (def. 20 seconds);- max. defrosting time (def. 60 minutes);- defrosting starting time (def. 30 minutes).ononCOMPRESSOR1offMin. ON of the compressorononCOMPRESSOR1offMin. OFF of the compressoroffCOMPRESSOR1offonCOMPRESSOR2offTime delay before starting the second compreononCOMPRESSOR1offoffTime delay between two consecutive ON of thePag.32/61