Foster Cold-Room Technicians Hand Book - Nccvmtc.org

FOSTER COLD – ROOMGenerator / power – supply panelMAINS POWER ‘ RETURNS ‘ (ON again) selector at ‘ AUTO ‘N 1 + _ (8-11) - prevents auto –start(1-3) + prepares NK ckt .(standby).(6-7)+RH2 + T2 + (and hols for preset time, 20sec.Allowing the generator to stop(87-30) + completely)STOP SOLENOID +(1-4) - prevent RH1 operation forpreset time,20 sec.(8-11) -(1-3)GK - _ (main contacts)- withdraw(+) generator supply from cold-roomRH2, T2 holds operatedpanelfor pre-set time(51-52)+ prepares RH1ckt(standby)(after lapse of(13-14)- prevents auto–stop cktPre-set time of T2)(5-6)- prevents low lube oilalarm ckt.T2 - (61-62) +(1-3) - NK + _ (61-62) - prevents operationOf GKRH2 -(51-52) - prevents ‘+ve’ supplyFrom charging-relay.(87-30) - (main contacts)+STOP SOLENOID –Extend ‘ MAINS ‘ supply toCold – room panel again42