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Table Of Contents

95-7232EF.book Page 1 Thursday, February 27, 2003 9:22 AM

RP670A and B

Pneumatic Switching Relays

INSTALLATION INSTRUCTIONS

DESCRIPTION

The RP670A/B are two-position switching relays. They

are used in pneumatic heating and cooling control

systems where a valve or a damper actuator must be

switched from one circuit to another. Fig. 1 and 2 show

approximate dimensions.

The RP670A has SPDT switching action and is gray in

color.

The RP670B has DPDT switching action; one SPDT

switch is gray and the second SPDT switch is white, as

shown in Fig. 2.

BEFORE INSTALLATION

CAUTION

Equipment Damage Hazard.

Switchover pilot pressure must be two-position,

not modulated, because during the switching, all

three ports of the switch (6, 7 and 8) are

interconnected.

INSTALLATION

Mounting

2-1/4

(57)

-1/2

[

DIA]

(38)

C8236

Fig. 1. Dimensions of RP670A in in. (mm).

GRAY WHITE

2-3/4

(70)

1-1/16

(26)

-1/2

[

DIA]

(38)

C8237A

RP670B

Fig. 2. Dimensions of RP670B in in. (mm).

Suspend on tubing or mount on a surface. Mount on a

wall or panel with the 1-1/2 in. (38 mm) diameter spring

clip supplied (part no. 14003030-001). Obtain a no. 10

screw locally when using the mounting clip There are two

ways of surface mounting. See Fig. 3.

ALL OR

PANEL

RELAY

NO. 10 X 1/2 IN.

SHEET METAL SCREW

(OBTAIN LOCALLY)

MOUNTING CLIP

(PROVIDED)

C3214

Fig. 3. RP670 surface mounting.

® U.S. Registered Trademark

95-7232EF-1

Summary of content (8 pages)

PAGE 1
95-7232EF.book Page 1 Thursday, February 27, 2003 9:22 AM RP670A and B Pneumatic Switching Relays INSTALLATION INSTRUCTIONS DESCRIPTION BEFORE INSTALLATION The RP670A/B are two-position switching relays. They are used in pneumatic heating and cooling control systems where a valve or a damper actuator must be switched from one circuit to another. Fig. 1 and 2 show approximate dimensions. CAUTION Equipment Damage Hazard.
PAGE 2
95-7232EF.book Page 2 Thursday, February 27, 2003 9:22 AM RP670A AND B PNEUMATIC SWITCHING RELAYS Piping Port Identification Table Fig. 4 shows adaptation piping. All connections are sharp barb 5/32 in. (4 mm) O.D. polyethylene tubing. Table 1 identifies the ports of Honeywell pneumatic relays including older models when upgrading the installation. CAUTION Table 1. Pneumatic Relay Ports. RP670A RP412A RP670B RP412B Equipment Damage Hazard.
PAGE 3
95-7232EF.book Page 3 Thursday, February 27, 2003 9:22 AM RP670A AND B PNEUMATIC SWITCHING RELAYS Operation Application When the pilot pressure exceeds the preset spring pressure, port 8 opens and connects to port 7 and port 6 closes. See Fig. 5A. When pilot pressure is less than the preset spring pressure, port 8 closes and port 6 opens and connects to port 7. See Fig. 5B. Fig. 6 shows a typical heating and cooling application using an RP670A.
PAGE 4
95-7232EF.book Page 4 Thursday, February 27, 2003 9:22 AM Automation and Control Solutions Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 95-7232EF–1 Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Scarborough, Ontario M1V 4Z9 B.B. Rev. 3-03 Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers. www.honeywell.
PAGE 5
95-7232EF.book Page 1 Thursday, February 27, 2003 9:22 AM Relais de commutation pneumatiques RP670A et B NOTICE D'INSTALLATION DESCRIPTION Les RP670A et B sont des relais de commutation à commande à deux positions. Ils sont utilisés dans les systèmes de régulation de chauffage et de refroidissement pour la commutation d‘un actionneur de vanne ou de registre d'un circuit à un autre. L'encombrement approximatif des relais est donné aux Fig. 1 et 2.
PAGE 6
95-7232EF.book Page 2 Thursday, February 27, 2003 9:22 AM RELAIS DE COMMUTATION PNEUMATIQUES RP670A ET B Canalisations Tableau des divers orifices La Fig. 4 montre comment effectuer le raccordement des canalisations. Tous les raccords sont des canalisations en polyéthylène à crans et droits 4 mm (5/32 po) de diam. ext. Le tableau 1 donne les orifices des relais pneumatiques Honeywell, y compris des anciens modèles. Cette information est utile lors de travaux de modernisation. Tableau 1.
PAGE 7
95-7232EF.book Page 3 Thursday, February 27, 2003 9:22 AM RELAIS DE COMMUTATION PNEUMATIQUES RP670A ET B Fonctionnement Application Lorsque la pression pilote est supérieure à la pression définie pour le ressort, l'orifice 8 s'ouvre et se raccorde à l'orifice 7 et l'orifice 6 se ferme. Voir la Fig. 5A. Lorsque la pression pilote est inférieure à la pression définie pour le ressort, l'orifice 8 se ferme et l'orifice 6 s'ouvre et se raccorde à l'orifice 7. Voir la Fig. 5B. La Fig.
PAGE 8
95-7232EF.book Page 4 Thursday, February 27, 2003 9:22 AM Solutions de régulation et d'automatisation Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 95-7232EF–1 Honeywell Limited-Honeywell Limitée 35, Dynamic Drive Scarborough (Ontario) M1V 4Z9 B.B. Rév. 3-03 Imprimé aux États-Unis sur du papier recyclé contenant au moins 10 % de fibres post-consommation. www.honeywell.