CONTROLS CONTROLS NNR SERIES LIQUID LEVEL CONTROL PUMP UP OR DOWN SWITCH SELECTABLE UL listed CSA recognized 10 Amp SPDT Rated Sensitivity Adjustment 4.7 k to 47 k One, Two or Three Probe Operation 24 VAC to 220 VAC Voltages 2 A- Pump down function: the output relay energizes when the liquid level S reaches the high or max. probe. It remains energized until the level is Max below the low or min probe. The relay will remain de-energized until the min LEVEL high level is again reached. This control may also be used with only two probes by connecting the maximum and common terminals together. R The output is energized when the low probe is in contact with the liquid. S B - Pump up function: when power is supplied to the unit, the output relay is energized. When the level reaches the high probe the relay is LEVEL de-energized. The relay is energized again when the level falls below the lob probe. The control may also be used with only two probes by R connecting the maximum and common terminals together. The output is 0 t de-energized when the level reaches the low probe. In both functions, If the container is conductive, It may be used as the SPECIFICATIONS: common probe in some applications Input 24, 48, 110, 220 VAC 15% (50/60 Hz) Maximum power consumption 24 VAC: 1.5 VA 48 VAC: 1.7 VA WIRING DIAGRAM: 110 VAC: 2 VA AC 220 VAC: 2 VA s Output . SPDT relay Contact material . AgCdO (90/10) Maximum loading 10 A AC resistive 1A DC inductive Pump Down (2) Maximum switching voltage 250 VAC 30 VDC Pump Up (1) Relay maximum power rating . 2500 VA 30 VDC 7 Mechanical life of relay 3 x 10 operations 5 Electrical life of relay . 2 x 10 at 2200 VA resistive load Max Min Common Probe isolation . Switching contact: 2000 VA AC Electrodes: 2000 VAC Probe sensitivity . 4.7 K ohm to 47 K ohm Probe voltage . 24 VAC, 60 Hz Probe current . 2 mA max. DIMENSIONS: Operating temperature +14F to 140F -10C to +60C 3.62 Weight . 4.6 oz. (130g) (92) Note: For best results use shielded cable with the probes and do not run probe cables with other wires. 1.5 2.16 (38.1) (55) 3 (76.2) ORDERING INFORMATION: N NR 220A MOUNTING SERIES INPUT POWER SERIES MOUNTING INPUT POWER NR N = Open PC Board 24A = 24 VAC 48A = 48 VAC 110A = 110 VAC 220A = 220 VAC Products and specifications subject to change without notice. Order/Technical Support Tel: (800) 677-5311 / FAX: (800) 677-3865 / www.crouzet-usa.com 2/73CONTROLS CONTROLS NRU SERIES LIQUID LEVEL CONTROL PUMP UP UL listed CSA recognized LED Relay Indicator Three Styles Pump Up Control 4.7 k to 100 k Sensitivity 10 Amp SPDT Relay Control of conductive liquids (tap water, sea water, sewage, S chemical solutions, coffee, ice cream, etc.) Max min LEVEL The relay is energized when the level falls below the low level R probe. It de-energizes when the high level probe is reached. The NRU will also control a single level. In this case, a single S probe is used and the relay operates when the probe is not immersed. The Max terminal is connected to common with a LEVEL jumper. R In either case, a common electrode is needed if the container 0 t is non-conductive. SPECIFICATIONS: WIRING DIAGRAM: Input Power .24, 48, 110, 220 VAC, 15% (50/60 Hz) Maximum voltage .24 VAC: 1.5 VA 48 VAC: 1.7 VA DNRU PNRU LNRU 110 VAC: 2 VA 220 VAC: 2 VA S S S Output .SPDT Relay Max C min C Max min Contact material .AgCdO Maximum loading 10A AC resistive 8A DC resistive Maximum switching voltage 250 VAC 80 VDC 6 min Max 45 A1 11 C 7 5 Maximum power rating 2500 VA 80 W 4 8 3 6 5 R Electrical life 2 x 10 at 2200 VA resistive load 3 9 RR 2 7 7 Mechanical life .3 x 10 operations 2 10 A2 12 14 1 11 1 8 Probe isolation .Electrodes: 2000 VAC Probe sensitivity .4.7 K to 100 K ohms Probe voltage 24 VAC, 60 Hz Probe current 2 mA max. Operating temperature +14F to +140F -10C to +60C Weight .7 oz. (200g) Note: The cable for probes (max 300ft) should be run in separate conduit. A shielded cable is recommended. ORDERING INFORMATION: P NRU 220D MOUNTING SERIES INPUT POWER INPUT POWER MOUNTING SERIES 24A = 24VAC D = DIN-rail mounting NRU 48A = 48VAC L = 11 pin plug-in 110A = 110VAC P = 8 pin plug-in 220A = 220VAC Products and specifications subject to change without notice. Order/Technical Support Tel: (800) 677-5311 / FAX: (800) 677-3865 / www.crouzet-usa.com 2/74