Carrier WEATHERMASTER 48/50Z030-105 Operation And Service Manual

Also see for 48/50Z030-105: Installation instructions

Contents

Carrier WEATHERMASTER 48/50Z030-105 Operation And Service Manual Manual pdf 90 page image

90Table 77 — Discharge PressureTransducer Pressure (psig) vs VoltageForcing Inputs and Outputs — Many of variablesmay be forced both from the CCN and directly at the localdisplay. This can be useful during diagnostic testing and alsoduring operation, typically as part of an advanced third partycontrol scheme. Please see Appendix A and B.NOTE: In the case of a power reset, any force levels in effectat the time of the power reset will be cleared.CONTROL LEVEL FORCING — If any of the followingpoints are forced with a priority level of 7 (consult CCN litera-ture for a description of priority levels), the software clears theforce from the point if it has not been written to or forced againwithin the timeout periods defined below:Run Status Menu — The Run Status menu provides theuser important information about the unit. The Run Status tablecan be used to troubleshoot problems and to help determinehow and why the unit is operating.AUTO VIEW OF RUN STATUS — The Auto View of RunStatus display table provides the most important unit informa-tion. The HVAC Mode (Run Status→VIEW→ HVAC) in-forms the user what HVAC mode the unit is currently in. Referto the Modes section on page 40 for information on HVACmodes. The occupied status, unit temperatures, unit set points,and stage information can also be shown. See Table 78.Run Status→VIEW→HVAC — Displays the current HVACMode(s) by name. HVAC Modes include:OFF VENT HIGH HEATSTARTING UP HIGH COOL FIRE SHUT DOWNSHUTTING DOWN LOW COOL PRESSURIZATIONDISABLED UNOCC FREE COOL EVACUATIONSOFTSTOP REQUEST TEMPERING HICOOL SMOKE PURGEREM SW DISABLE TEMPERING LOCOOLDEHUMIDIFICATIONCOMP STUCK ON TEMPERING VENT RE-HEATTEST LOW HEATRun Status→VIEW→OCC — Displays the current occupan-cy status of the control.Run Status→VIEW→MAT — Displays the current value formixed-air temperature. This value is calculated based onreturn-air and outside-air temperatures and economizer damperposition.Run Status→VIEW→EDT — Displays the current evapora-tor discharge air temperature during Cooling modes. This valueis read at the supply air thermistor location (or at cooling coilthermistor array if unit is equipped with hydronic heating coil).Run Status→VIEW→LAT — Displays the current leaving-air temperature during Vent and Hydronic Heating modes. Thisvalue is read at the supply air thermistor location.Run Status→VIEW→EC.C.P — Displays the current econo-mizer control point value (a target value for air temperatureleaving the evaporator coil location).Run Status→VIEW→ECN.P — Displays the current actualeconomizer position (in percentage open).Run Status→VIEW→EC2.P — Displays the current posi-tion of actuator no. 2 (in percentage open).Run Status→VIEW→CL.C.P — Displays the current cool-ing control point (a target value for air temperature leaving theevaporator coil location).Run Status→VIEW→C.CAP — Displays the currentamount of unit cooling capacity (in percent of maximum).Compare to staging tables in Appendix C.Run Status→VIEW→CL.ST — Displays the current numberof requested cooling stages. Compare to staging tables inAppendix C and to C.CAP above.Run Status→VIEW→HT.C.P — Displays the current heat-ing control point, for use with staged gas control option only (atarget value for air temperature leaving the supply duct).Run Status→VIEW→HT.ST — Displays the current numberof heating stages active (for staged gas control option only).Compare to following point.Run Status→VIEW→H.MAX — Displays the maximumnumber of heat stages available for this model.PRESSURE(psig)VOLTAGE DROP(v)0 0.46610 0.56420 0.66330 0.76140 0.86050 0.95860 1.05670 1.15580 1.25390 1.352100 1.450110 1.549120 1.647130 1.745140 1.844150 1.942160 2.041170 2.139180 2.238190 2.336200 2.434210 2.533220 2.631230 2.730240 2.828250 2.927260 3.025270 3.124280 3.222290 3.320300 3.419310 3.517320 3.616330 3.714340 3.813350 3.911360 4.009370 4.108380 4.206390 4.305400 4.403410 4.502420 4.600Temperatures→AIR.T→OAT Outside Air Temperature 30 minutesTemperatures→AIR.T→RAT Return Air Temperature 3 minutesTemperatures→AIR.T→SPT Space Temperature 3 minutesInputs→RSET→SP.RS Static Pressure Reset 30 minutesInputs→REL.H→OA.RH Outside Air Relative Humidity 30 minutesInputs→AIR.Q→OAQ Outside Air Quality 30 minutes