Page 1
The RP973A is a three-port, direct-acting and averaging pneumatic relay that produces an output pressure equal Fig. 1 shows approximate dimensions. to the average of the two input pressures. It is used in...
Page 2
Fig. 3.shows adaptation piping. All connections are sharp barb 5/32 in. (4 mm) O.D. polyethylene tubing. The two right column in Table 1 identify the ports of older Honeywell pneumatic relays when upgrading installation. CAUTION Table 1. Pneumatic Relay Ports.
(kPa), the more accurate the device such as another RP973A averaging relay RP973A becomes. If the inputs are 3 and 13 psi (21 and or an SP970A,B pilot. See Fig. 5. 90 kPa), the output is 8 ±2 psi (55 ±14 kPa). See Fig. 4. If...
Page 4
For averaging sensor lines use the RP922A Pneumatic Potentiometer. Because input signal air flows from higher to lower, do not use the RP973A on bleed-type thermostat lines. To M7883 average bleed-type devices, use an isolating (repeating) circuit. See Fig. 6. Refer to Fig. 7 for a typical application.
à crans en polyéthylène de 4 mm (5/32 po) de diam. ext. Le tableau 1 donne les orifices des relais pneumatiques MISE EN GARDE Honeywell, y compris des anciens modèles. Cette information est utile lors de travaux de modernisation. Risque de dommage matériel.
Application Le relais est conçu de manière que la pression de sortie Le relais de moyenne RP973A est un appareil de type ne dépasse jamais la moyenne des deux pressions purgeur dont la sortie doit être située à l'extrémité de la d'entrée, phénomène courant dans les relais de...
à la Fig. 7 pour une application type. By using this Honeywell literature, you agree that Honeywell will have no liability for any damages arising out of your use or modification to, the literature. You will defend and indemnify Honeywell, its affiliates and subsidiaries, from and against any liability, cost, or damages, including attorneys’...