Data Aire dap 4 User Manual

97•dap4UserManual
option turned on, the fan will operate at minimum fan speed when the valve is fully open and at
 maximumfanspeedwhenthevalveisfullyclosed.
4. Static Pressure Constant (Air Pressure) - Optional
In Static Pressure Constant mode, a differential pressure (DP) transducer is required and
connected to dap4 module to report the differential pressure across the unit (between supply
and return air section).
 Whenstartedinthismode,thefanwillrstoperateattheconstantspeedsetinCWSpeedfor
5 minutes. After that, the fan will proportionally increase or decrease the speed to maintain the
constant static pressure setpoint set in Static Air Pressure menu page, and the deadband set in
static band.
5. AirowConstant(Const.ow)-Optional
 Thisoptionrequiresafactoryinstalledairowowmeasurementkitandprogramming.
 Onunitswhereconstantdesignairowisrequired,anairowvalueisenteredintoairowSET
POINT on FAN AIR FLOW menu. In this mode, the fan will start and operate at this constant
 designairowallthetime.
6. AirowControlledbyBMS(BMSFlow)-Optional
 InAirowControlledbyBMSmode,thedap4willstartandoperatethefanattheconstantair
 owsetinairowsetpointinFanAirowmenuuntilthedap4receivesavalidairowvalue
 (greaterthantheminimumallowedairowandlessthanthemaximumallowedairow)froma
 BMS.Thiscontrolmoderequiresanoptionalairowmeasurementkit.
 TheairowwillautomaticallyincreasetothemaximumairowsetinMaximumFlowwhen
 reheatorhumidicationisrequired.TheairowwillreverttotheBMScontrolledairowsetting
 whentheunitstopscallingforreheatorhumidication.
WARNING: IF CUSTOMER DECIDES TO USE THIS FAN SPEED CONTROL MODE (AIR
FLOW CONTROLLED BY BMS), DATA AIRE WILL NOT BE RESPONSIBLE FOR ANY
EFFECTS, MALFUNCTIONS OR SPACE CONTROL CONDITIONS CAUSED BY THIS
SELECTION.
7. AirowProportionaltoCWValve(Vlv.Pos.Flow)-Optional
 OnunitswhereproportionalfanairowcontrolbasedontheCWvalvepositionisrequired,the
 maximumairowisprogrammedviaMaximumFlowmenu,andtheminimumairowasaper-
 centageofthemaximumairowisprogrammedviaMinimumFlowmenuinFanAirowsetting.
 Thiscontrolmoderequiresanoptionalairowmeasurementkit.
 Whenthefanstarts,itwilloperateattheminimumairowvalue.Asthechilledwatervalve
 opens,thefanairowwillmodulateproportionallybasedontheCWvalvepositionfromthe
 minimumairow(whentheCWvalveisfullyclosed)tothemaximumairow(whentheCW
valve is fully open).
 Thefanwilloperateatthemaximumairowwhentheunitcallsforreheatorhumidication.

Data Aire dap 4 Specifications

General

Brand	Data Aire
Model	dap 4
Category	Control Unit
Language	English