Danfoss RT 112 Installation Manual

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installation guide

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Installation guidePressure switchRT 5, RT 110, RT 112, RT 116, RT 117, RT 121, RT 200017R9315017R9315© Danfoss | DCS (jmn) | 2015.11IC.PI.P10.C5.53 | 520B7012 | 1Danfoss17-5027.101 m Cu7/16 - 20 UNFFig. 1 Fig. 2 Fig. 3 Fig. 4Fig. 5 Fig. 6 Fig. 7ENGLISHDataPressure switch, types RT 5, RT 110,RT 112, RT 117, RT 121, RT 200, RT 116Max. test pressureRT 110, RT 112, RT 121: 8 barRT 5, RT 116, RT 200: 25 barRT 117: 47 barFittingA set of Pg13.5 cable gland is attached tothe RT in a separate bag. To ensure IP66(units with automatic reset) or IP54 (unitswith external reset) grade of RT enclosureit is necessary to assemble this gland asshown in the fig. 2. If this gland is not usedwith a cable, a metal blinding should be alsoassembled.Damp out strong pressure pulsations.A damping coil, fig. 3 or fig. 4, will often besufficient.Insert a water-filled tube loop as atemperature lock (e.g. a 10 mm Cu tube) if athigh plant temperatures there is a risk thatthe pressure connection of the control willbecome heated to more than 100 °C.Position the pressure control so that onwater plant it cannot be exposed to frost. Itcan operate on an air cushion, for example.SettingThe pressure controller is set by rotating theknob (5), at the same time reading the mainscale (9). See fig. 1.The differential is set by rotating thedifferential adjusting nut (19) to the valueindicated by the use of the nomogram infig. 6. The maximum operating pressure isthus the sum of the setting pressure and thedifferential.ExampleIt is desired to control the pressure in anoilfired steam boiler by the use of an RT 116.Maximum pressure 9 bar.Minimum pressure 8.2 bar.Differential 9 - 8.2 = 0.8 bar.1. Connect the oil burner to terminals 1-2of the pressure switch.2. Set the pressure switch for 8.2 bar byrotating the knob (5).3. Set the differential adjusting nut (19) atthe figure 7 which is found by readingthe nomogram in fig. 6.DANSKCode no.017xxxxCode no.060-333366Code no.060-007166DataPressostater type RT 5, RT 110, RT 112,RT 117, RT 121, RT 200, RT 116Max. prøvetrykRT 110, RT 112, RT 121: 8 barRT 5, RT 116, RT 200: 25 barRT 117: 47 barMonteringEt sæt Pg13,5 kabelforskruning er vedlagtproduktet i en separat pose. For at sikrekapslingsgrad IP66 (enheder med automatiskreset) eller IP54 (enheder med ekstern DANSKRESET) er det nødvendigt at montere dennekabelforskruning som vist i fig. 3. Hvis dennekabelforskruning ikke bruges sammen medet kabel, bør der monteres en blindprop(metal skive).Dæmp kraftige trykpulsationer. Ofte erdæmpesløjfe fig.3 eller fig. 4 tilstrækkelig.Indskyd en vandfyldt rørsløjfe somtemperaturspærre, fx af10 mm Cu-rør, hvisder i anlæg med høje temperaturer er risikofor at pressostatens tryktiIslutning kanopvarmes til over 100 °C.Anbring pressostaten, så den ved vandanlægikke udsættes for frost (lad den fx ar-bejde påen luftpude).IndstillingPressostaten indstilles efter. den funktion -slutte eller bryde - som skal ske ved faldendetryk (områdeindstilling).Selve indstillingen udføres med hånd-

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