Submittal Sheet

2
RP971A RATIO RELAY
77-9849
Honeywell Europe S.A.
3 Avenue du Bourget
B-1140 Brussels Belgium
Honeywell Asia Pacific Inc.
Room 3213-3225
Sun Hung Kai Centre
No. 30 Harbour Road
Wanchai
Hong Kong
Home and Building Control
Honeywell Limited-Honeywell Limitée
155 Gordon Baker Road
North York, Ontario
M2H 2C9
Honeywell Latin American Division
Miami Lakes Headquarters
14505 Commerce Way Suite 500
Miami Lakes FL 33016
Helping You Control Your World
77-9849 Rev. 6-90
Home and Building Control
Honeywell Inc.
Honeywell Plaza
P.O. Box 524
Minneapolis MN 55408-0524
Printed in U.S.A. on recycled paper
containing at least 10% post-consumer paper fibers
DESCRIPTION
The RP971A Ratio Relay is a four port nonbleed pneumatic
relay which produces a modulating pressure output
proportional to pilot input changes. It is used to control
pneumatic valve or damper actuators in sequence from a
single thermostat.
SPECIFICATIONS
Model:
RP971A Ratio Relay
Operating Range:
0 to 18 psi (0 to 124 kPa)
Maximum Safe Air Pressure:
30 psi (205 kPa)
Ambient Operating Limits:
Temperature: 0 to 140F (–18 to 60C)
Humidity: 5 to 95%
Operating Air Pressures:
Pilot: 3 to 15 psi (21 to 103 kPa)
Main: 18 psi (124 kPa)
Air Handling Capacity:
0.039 scfm at 1 psi differential (18 ml/s at 5 kPa differential)
Air Consumption:
0.002 scfm (0.8 ml/s) maximum
Start Point:
Adjustable from 0 to 10 psi (0 to 69 kPa)
Pilot Operating Span:
3 or 5 psi (20 or 35 kPa), nonadjustable
Mounting:
In line, wall, or panel mounted
Air Connections:
Barb type for 1/4-in. (6-mm) O.D. plastic tubing for Port 1 and
5/32-in. (4-mm) O.D. plastic tubing for Ports 2, 3, and 4
Construction:
Molded plastic with neoprene diaphragm, stainless steel
valve seats, and 100-mesh stainless steel filters in main
and branch ports
Accessories:
801629T Cable Clamp (2 in. [51 mm] dia) for wall mounting
if desired
Dimensions:
2 in. (51 mm) dia x 2-5/8 (67 mm) deep