Danfoss KPU 1 Installation Manual

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Installation GuideSingle Pressure ControlType KPU© Danfoss A/S (AC-MCI / jmn), 2012-12 DKRCC.PI.CD0.F1.22 / 520H6076 1060R9767060R9767ApplicationKPU pressure controls are for use on commercialrefrigeration and air conditioning systems to give protectionagainst excessively low suction pressure or excessivelyhigh discharge pressure.They are also used for starting and stopping refrigerationcompressors and fans on air-cooled condensers.KPU pressure controls are fitted with the Single-Pole Single-Throw (SPST) or Single-Pole Double-Throw (SPDT) switches,suitable for direct as well as indirect (with a contactor) control.KPU pressure controls are available in several pressure rangesand are compatible with HCFC and non-flammable HFCrefrigerants. KPU 6W and KPU 6B are fail safe controls for highpressure refrigerants (R410A and R744). Standard enclosure is~NEMA 1InstallationSelect an accessible location, where the control and pressureconnection line will not be subject to damage.IMPORTANT:Mount the pressure control in a position that willallow drainage of liquids away from control bellows.Pressure connection of the control must always belocated on the top side of the refrigerant line.This reduces the possibility of oil, liquids, orsediment collecting in the bellows, which couldcause the control malfunction.IMPORTANT:Ensure the ambient temperature for the pressurecontrol is higher than the refrigeration line as thatwill prevent liquid migration and accumulation inthe bellows.Product SpecificationApplication TypeCode numberResetContact system Regulatingrange[inHg][psig]Differential∆p[psi]Max.workingpressure[psig]Max.testingpressure[psig]Ambienttemp.[°F]¼ in.male flare36 in. cap.tube w. ¼ in.flare nutType SwitchactionLow PressureControlCut Out onpressure fallKPU 1 060-5231 060-5233 Auto. SPDT — 6 in. – 108 10 – 60 250 290-40 – 122(175 for max.2 hours)KPU 1 060-5236 — Auto. SPST(NO) close High open Low 6 in. – 108 10 – 60 250 290KPU 2 060-5237 060-5235 Auto. SPST(NO) close High open Low 6 in. – 73 6 – 30 250 290KPU 2 060-5239 060-5240 Auto. SPDT — 6 in. – 73 6 – 30 250 290KPU1B 060-5232 060-5234 Man (Min.) SPDT — 28 in. – 100 10 fixed 250 290Fan control KPU 5 060-5241 060-5242 Auto. SPST(NO) close High open Low 100 – 465 25 – 85 510 530High PressureControlCut Out onpressure riseKPU 6W 060-5243 060-5245 Auto. SPDT — 100 – 600 58 – 145 675 / 610* 725KPU 6B 060-5244 060-5246 Man. (Max.) SPDT — 100 – 600 60 fixed 675 / 610* 725* 610psig - MWP for products used according to 97/23/EG PED directive.

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