Install Instructions

RP971A PNEUMATIC RATIO (SEQUENCING) RELAY
Application
Fig. 5 shows graphical examples of 3 and 5 psi (21 and
34 kPa) models.
PILOT SPAN 3 PSI (21 kPa)
START POINT PRESSURE 6 PSI (41 kPa)
15
(105)
13
(90)
OUTPUT
10
SIGNAL
(70)
3 to 13 PSI
(20 TO 90 kPa)
5
(35)
3
(20)
0
(0)
0 5 10 15
(0) (35) (70) (105)
PILOT SPAN 5 PSI (21 kPa)
START POINT PRESSURE 8 PSI (55 kPa)
15
(105)
13
(90)
OUTPUT
10
SIGNAL
(70)
3 to 13 PSI
(20 TO 90 kPa)
5
(35)
3
(20)
0
(0)
0 5 10 15
(0) (35) (70) (105)
INPUT SIGNAL THERMOSTAT BRANCH LINE - PSI (kPa)
C8250
Fig. 5. Graphical Examples of
3 and 5 psi (21 and 34 kPa) models.
The RP971A is used to sequence damper actuators.
Typically, it is used to sequence two to three actuators.
See Fig. 6.
ROOM
THERMOSTAT
M
3-6 PSI
6-9 PSI 9-12 PSI
(21-41 kPa)
(41-62 kPa) (62-83 kPa)
PSP 9 PSI
(62 kPa)
ALL THREE
RP971As
PILOT START
3 PSI
POINT (PSP)
(32 kPa)
3 PSI (32 kPa)
PILOT SPANS
EXH
ALL DAMPER
ACTUATOR
SPRING RANGES
3-13 PSI
(20-90 kPa)
EXH
EXH
PSP
6 PSI
(41 kPa)
M
3 3 3
41
2
41
2
41
2
C4478-1
Fig. 6. Typical RP971A Application to
Sequence Dampers from a Single Thermostat.
Home and Building Control
Home and Building Control
Helping You Control Your World
Honeywell Inc.
Honeywell Limited-Honeywell Limitée
Honeywell Plaza
155 Gordon Baker Road
P.O. Box 524
North York, Ontario
Minneapolis, MN 55408-0524
M2H 2C9
95-7234 M.V. Rev. 3-96 Printed in U.S.A