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Selection chart Table 192: Selection Chart Product Code Number Time Delay Time Delay Heater Circuit VAC Type of Reset Range 1 psi (kPa) Refrigerant (R) Pressure Connection P28AA-1C 2 90 seconds P28AA-17C 4 120 seconds P28AA-18C 45 seconds 120/240 Manual 8 to 70 (55 to 483) Non-corrosive 3 36 in. capillary with 1/4 in. flare nut 1 Switch differential approximately 5 psig (34 kPa). Time delay relay energizes at 9 psig (61 kPa) pressure difference, de-energized at 14 psig (97 kPa) difference 2 Replaces Ranco ® P30-3701 3 Non-corrosive refrigerants include R-12, R-22, R-134A, R-500, R-502 (R) 4 Replaces Ranco P30-3801 P28 Series Lube Oil Pressure Cutout Control with Time Delay technical specifications The maximum bellows pressure is 180 psig (2,241 kPa). Table 193: Electrical Ratings - Pilot Duty P28DA-1 Contact Rating 2 to 1: 2 to 3 (must be same voltage as time delay circuit) Time Delay Heater Circuit Pilot Circuit Alarm Circuit (must be same voltage as pilot circuit) Crankcase Heater: Term 2 to 1 Runlight: Term 2 to 3 120/240 VAC 750 VA, 120/240 VAC 125 VA, 120/240 VAC 10 A 120 VAC, 5 A 240 VAC 24 VAC or VDC 125 VA, 24 VAC 57.5 VA, 24 VDC 125 VA, 24 VAC 57.5 VA, 24 VDC --- 10 W 166 Refrigeration Products Catalog

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