Install Instructions

ManualsBrandsHoneywell ManualsDampersPneumatic Capacity Relay

RP970A

Pneumatic Capacity Relay

DESCRIPTION

The RP970A Capacity Relay is a direct acting, proportional

relay, with a 1:1 pressure ratio. It is suitable for use in

systems to increase the capacity of a branchline signal to

a pneumatic valve or damper operator. It is also used to

isolate an input, and repeat a pressure.

Fig. 1 shows installation dimensions in inches (millime-

ters).

1-1/2

(38)

1-1/2

(38)

C4870-1

Fig. 1. RP970A Dimensions .

INSTALLATION INSTRUCTIONS

INSTALLATION

Mounting

Suspend on tubing or mount on a surface. See Fig. 2. for

surface mounting.

WALL OR

PANEL

RELAY

NO. 10 X 1/2 IN.

SHEET METAL SCREW

(OBTAIN LOCALLY)

14003030-001 MOUNTING CLIP

(PROVIDED ON SOME MODELS)

C8122

Fig. 2. Typical Surface Mounting.

95-7233

Summary of content (4 pages)

PAGE 1
RP970A Pneumatic Capacity Relay INSTALLATION INSTRUCTIONS DESCRIPTION INSTALLATION The RP970A Capacity Relay is a direct acting, proportional relay, with a 1:1 pressure ratio. It is suitable for use in systems to increase the capacity of a branchline signal to a pneumatic valve or damper operator. It is also used to isolate an input, and repeat a pressure. Mounting Fig. 1 shows installation dimensions in inches (millime ters). 2 Suspend on tubing or mount on a surface. See Fig. 2.
PAGE 2
RP970A PNEUMATIC CAPACITY RELAY Piping Port Identification Table Fig. 3 shows adaptation piping. Port 1 (Main, Supply) sharp barb for 1/4-in. (6 mm) O.D. tubing. Ports 2, 3, and 4 (Branch, Output; Pilot, Input; and Exhaust, respectively), sharp barb for 5/32-in (4 mm) O.D. tubing. The shaded area of the following table identifies the ports on older Honeywell pneumatic relays when upgrading installation. CAUTION To prevent damage to the sharp barb connections, do not attempt to cut or pull tubing.
PAGE 3
RP970A PNEUMATIC CAPACITY RELAY Operation Application Figs. 4 and 5 show typical operation. When pilot pressure increases, the exhaust tube raises the diaphragm off the branch chamber port and main air flows into the branchline, pushing against Diaphragm 2, (Fig. 4A). This pressure forces the exhaust tube down and closes the branch chamber port. Branchline pressure now equals pilot pressure (Fig. 4B).
PAGE 4
Home and Building Control Honeywell Inc. Honeywell Plaza P.O. Box 524 Minneapolis, MN 55408-0524 Home and Building Control Honeywell Limited-Honeywell Limitée 155 Gordon Baker Road North York, Ontario M2H 2C9 95-7233 M.V. Rev. 2-96 Printed in U.S.