Carrier PSV, PSD006-070, 50PSH instruction manual Complete C and Deluxe D Board System Test, Off

Page 46

screen. The following conditions must be true for economizer operation:

SAT reading is available.

LWT reading is available.

If occupied, the SPT is greater than the occupied cooling set point or less than the occupied heating set point and the condenser water is suitable.

Space temperature reading is valid.

If unoccupied, the SPT is greater than the unoccupied cooling set point or less than the unoccupied heating set point and the condenser water is suitable.

Modulating Water Economizer Control — The control has the capability to modulate a water valve to control condenser water flowing through a coil on the entering air side of the unit.

Cooling — The purpose is to provide an economizer cooling function by using the water loop when the entering water loop temperature is suitable (at least 5° F below space temperature). If the water loop conditions are suitable, then the valve will modulate open as required to maintain a supply-air temperature that meets the load conditions. Should the economizer coil ca- pacity alone be insufficient for a period greater than 5 minutes, or should a high humidity condition occur, then the compressor will also be started to satisfy the load. Should the SAT ap- proach the minimum cooling SAT limit, the economizer valve will modulate closed during compressor operation.

Heating — Additionally, the control will modulate the water valve should the entering water loop temperature be suitable for heating (at least 5° F above space temperature) and heat is required. The valve will be controlled in a similar manner ex- cept to satisfy the heating requirement. Should the economizer coil capacity alone be insufficient to satisfy the space load con- ditions for more than 5 minutes, then the compressor will be started to satisfy the load. Should the SAT approach the maxi- mum heating SAT limit, the economizer valve will modulate closed during compressor operation.

Two-Position Water Economizer Control — The control has the capability to control a NO or NC, two-position water valve to control condenser water flow through a coil on the entering air side of the unit.

Cooling — The purpose is to provide a cooling economizer function directly from the condenser water loop when the en- tering water loop temperature is suitable (at least 5° F below space temperature). If the optional coil is provided and the wa- ter loop conditions are suitable, then the valve will open to pro- vide cooling to the space when required. Should the capacity be insufficient for a period greater than 5 minutes, or should a high humidity condition occur, then the compressor will be started to satisfy the load. Should the SAT reach the minimum cooling SAT limit, the economizer valve will close during compressor operation.

Heating — Additionally, the economizer control will open the water valve should the entering water loop temperature be suit- able for heating (at least 5° F above space temperature) and heat is required. The valve will be controlled in a similar man- ner except to satisfy the heating requirement. Should the coil capacity be insufficient to satisfy the space load for more than 5 minutes, then the compressor will be started to satisfy the load. Should the SAT reach the maximum heating SAT limit, the economizer valve will close during compressor operation.

DEMAND LIMIT — The WSHP Open controller has the ability to accept three levels of demand limit from the network. In response to a demand limit, the unit will decrease its heating set point and increase its cooling set point to widen the range in order to immediately lower the electrical demand. The amount of temperature adjustment in response is user adjustable for both heating and cooling and for each demand level. The re- sponse to a particular demand level may also be set to zero.

CONDENSER WATER LINKAGE — The

control pro-

vides optimized water loop operation using

an universal

controller (UC) open loop controller. Loop pump operation is automatically controlled by WSHP equipment occupancy schedules, unoccupied demand and tenant override conditions. Positive pump status feedback prevents nuisance fault trips. The condenser water linkage operates when a request for con- denser water pump operation is sent from each WSHP to the loop controller. This request is generated whenever any WSHP is scheduled to be occupied, is starting during optimal start (for warm-up or pull down prior to occupancy), there is an unoccupied heating or cooling demand, or a tenant pushbutton override. At each WSHP, the water loop temperature and the loop pump status is given. The WSHP will NOT start a com- pressor until the loop pumps are running or will shutdown the compressors should the pumps stop. This prevents the WSHP from operating without water flow and thus tripping out on re- frigerant pressure, causing a lockout condition. The WSHP Open controller control will prevent this from occurring. Also, the loop controller can be configured to start the pumps only after a configurable number of WSHPs are requesting opera- tion (from 1-"N"). This can be used to prevent starting the en- tire loop operation for only one WSHP. Meanwhile, the WSHPs will not operate if the loop pump status is off and therefore the WSHP compressor will not run.

COMPLETE C AND DELUXE D BOARD

SYSTEM TEST

Test mode provides the ability to check the control opera- tion in a timely manner. The control enters a 20-minute test mode by momentarily shorting the test terminals. All time de- lays are sped up 15 times. The follow operations are common to both Complete C and Deluxe D controls.

Test Mode — To enter Test mode, cycle the power 3 times within 60 seconds. The LED will flash a code representing the last fault when entering the Test mode. The alarm relay will also power on and off during Test mode. See Tables 34 and 35. To exit Test mode, short the terminals for 3 seconds or cycle the power 3 times within 60 seconds.

NOTE: The flashing code and alarm relay cycling code will both have the same numerical label. For example, flashing code 1 will have an alarm relay cycling code 1. Code 1 indi- cates the control has not faulted since the last power off to power on sequence.

Table 34 — Complete C Control Current LED

Status and Alarm Relay Operations

LED STATUS

DESCRIPTION OF OPERATION

ALARM RELAY

 

 

 

Normal Mode

Open

 

On

Normal Mode with PM Warning

Cycle (closed 5 sec.,

 

 

open 25 sec.)

 

 

 

 

 

 

Off

Complete C Control is non-functional

Open

 

Slow Flash

 

Fault Retry

 

Open

 

Fast Flash

 

Lockout

 

Closed

 

Slow Flash

Over/Under Voltage Shutdown

Open, (Closed after

 

15 minutes)

 

 

 

 

 

Flashing Code 1

Test Mode — No fault in memory

Cycling Code 1

Flashing Code 2

Test Mode — HP Fault in memory

Cycling Code 2

Flashing Code 3

Test Mode — LP Fault in memory

Cycling Code 3

Flashing Code 4

Test Mode — FP1 Fault in memory

Cycling Code 4

Flashing Code 5

Test Mode — FP2 Fault in memory

Cycling Code 5

Flashing Code 6

Test Mode — CO Fault in memory

Cycling Code 6

Flashing Code 7

Test Mode — Over/Under

Cycling Code 7

shutdown in memory

 

 

 

Flashing Code 8

Test Mode — PM in memory

Cycling Code 8

Flashing Code 9

Test Mode — FP1/FP2

Cycling Code 9

Swapped Fault in memory

 

 

 

 

 

LEGEND

 

 

CO

Condensate Overflow

LED

Light-Emitting Diode

FP

Freeze Protection

LP

Low Pressure

HP

High Pressure

PM

Performance Monitor

NOTES:

1.Slow flash is 1 flash every 2 seconds.

2.Fast flash is 2 flashes every 1 second.

3.EXAMPLE: “Flashing Code 2” is represented by 2 fast flashes followed by a 10-second pause. This sequence will repeat continually until the fault is cleared.

46

Image 46
Contents Installation, Start-Up, Service Instructions ContentsInstallation Safety ConsiderationsGeneral Physical Data 50PSH, PSV, PSD018-070 Units Typical Installation 50PSH Unit CAP ASPBSP Code Return Discharge CSP50PSV Dimensional Data A50-7846ef HWR Hot Water Reheat Left Hand Right HandSide Discharge Back DischargeInstall Condensate Drain Mount the UnitTrap Condensate Drain Connection Open Loop and Recirculating Well Water Quality GuidelinesMaterial Typical Ground-Water Piping Installation Metal Hose Minimum Bend RadiiWire Field Power Supply Supply/Return Hose KitTrans Complete C Controller Fault CodesDescription of Operation LED Alarm Relay AstatCompr Wire NumberBMC Yellow REDECM LWTA50-8363 Units with ECM, Complete C and LON Controller 460A50-8364 Units with ECM, Deluxe D and LON Controller 460Hpws SATMves WHSP-OPEN A50 83548356 LWT A50-8380 Wshp Open Control50PSH, PSV, PSD Electrical Data PSC Motor 50PSH, PSV, PSD Electrical Data PSC High-Static Motor50PSH, PSV, PSD Electrical Data, ECM Motor Wire Field Controls Low Voltage Field WiringA50-8442 Rnet Wiring SpecificationsA50-8441 Field-Supplied Sensors for Wshp Open ControllerOperate ECM Interface Board Rnet WiringWire Terminal A50-8443Setting Size ECM Blower Motor Performance DataCoil Units with Reheat ESP Loss Face Velocity Rated MIN FANUnit Airflow CFM Speed Size FPMPRE-START-UP Complete C Control Jumper SettingsDeluxe D Control Jumper Settings Field Selectable InputsHumidistat/Dehumidistat Logic Deluxe D DIP Switch Settings DIP Switch Block S2 Accessory 1 Relay OptionsDIP Switch Block S2 Accessory 2 Relay Options VACHWR Operating Modes A50-8145Operating Limits Unit Start-Up Cooling ModeSTART-UP Operating Limits 50PSH, PSV, PSD UnitsCooling Heating Water Flow Rate GPM Rise F Drop F Unit Start-Up Heating ModeWater Temperature Change Through Heat Exchanger Water Flow TempGPM/ton Pressure Heat Cooling Rise Drop Psig Flow Flow Unit Start-Up with Wshp Open Controls BACview6 Display InterfaceUnit Size 50PSH, PSV, PSD Water Water Temperature F Flow50PSH, PSV, PSD Coaxial Water Pressure Drop GPMOperation Approximate Fluid Volume gal Per 100 Ft of PipeAntifreeze Percentages by Volume Units with Aquazone Complete C ControlUnits with HWR Option Units with Wshp Open Multiple ProtocolPage Page Complete C and Deluxe D Board System Test LED Status Description of Operation Alarm RelayOff Aquazone Deluxe D Control LED Indica Complete C Control LED Code Fault DescriptionsLED Code Fault Description Description Status LED Test LEDService Air Coil Fan Motor Removal TroubleshootingRefrigerant Charging Replacing the Wshp Open Controller’s BatFP1 and FP2 Thermistor Location Page ECM Troubleshooting Fault Description SolutionECM Pin Connectors A50-8448ECM Troubleshooting Flow Diagram A50-8447Good Practices Wshp TroubleshootingFault Heating Cooling Possible Cause Solution TXVNo Fault Code Shown Condensate FaultCode 7 Auto Resetting CodeLow Suction Pressure Temperature in HeatingHigh Head Pressure Low Discharge AirAppendix a Wshp Open Screen Configuration Appendix a Wshp Open Screen Configuration Exception Set PointsWeekly Schedule Schedules 1Service Appendix a Wshp Screen Open ConfigurationTest Point Name Password Editable Range Default Level Configuration ServiceScreen Name Alarm LinkagePage Page Copyright 2009 Carrier Corporation 50PSH,PSV,PSD START-UP Checklist II. START-UPA50-8494 Heating Cycle AnalysisCooling Cycle Analysis A50-8495