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RP470 Pneumatic Selector Relay
RP470A Higher-of-Two Pressures Application
ZONE 1
DA
THERMOSTAT
THERMOSTAT
M B
M
M
N.C.
N.C.
DAMPER
DAMPER
ACTUATOR
ACTUATOR
3
5
2
RP470A
3
5
2
RP470A
RA
VALVE
ACTUATOR
Product Number
Operation
RP470A1003
Higher-of-two-
pressures selector relay
RP470B1001
repeater relay; Lower-
of-two pressures;
Lockout
ZONE 2
ZONE 3
DA
DA
THERMOSTAT
M B
M B
M
N.C.
DAMPER
ACTUATOR
C4492
Input Operating
Pressure
(psi)
(kPa)
0 to 20 psi
0 to 138 kPa Pneumatic Selector Relay, transmits
0 to 20 psi
0 to 138 kPa Pneumatic Selector Relay, used in
Three-port relays used in HVAC systems to perform a variety of
relay functions; transmit the higher of two input signals, lock out
one pressure signal when a second signal is higher, or transmit
the lower of two pressure signals. Replacement devices are
available for Johnson, Powers, Robertshaw, Barber-Colman, and
older Honeywell devices.
•
Uses diaphragm-logic technology.
•
In-line, wall, or panel mounted.
•
Sharp-barb air connections.
•
Molded plastic construction.
Type: Pneumatic Three-port Selector Relay
Dimensions, Approximate: 1 1/2 in. diameter x 1 in. deep
(38 mm diameter x 25 mm deep)
Air Connections: Barb fittings 5/32 in. (4 mm) O.D. plastic tubing
Capacity: 0.039 scfm at 1 psi differential (18 mL/s at 5 kPa differential)
Operation: Higher-of-two-pressures selector relay
Mounting: Wall or In-line or panel
Operating Humidity Range (% RH): 5 to 95% RH
Temperature Range: 0 F to 140 F (-18 C to +60 C)
Maximum Safe Operating Pressure: 30 psi (205 kPa)
Description
higher of two input pressures
lockout, repeater and lower of two input
pressure applications.
70-6925
Relays
Includes
14003030-001, 1 1/2 in. Mounting
Clip for Mounting relay to wall or
panel
14003030-001, 1 1/2 in. Mounting
Clip for Mounting relay to wall or
panel
53
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