Relays
60 customer.honeywell.com 70-6925
RP972 Pneumatic Reversing Relay
A modulating relay suitable for all types of heating and air
conditioning control systems to reverse and increase the capacity
of the branchline pressure to the final control element. The output
varies inversely with the input with an adjustable offset.
Replacement devices are available for Johnson, Powers,
Robertshaw, Barber-Colman, and older Honeywell devices.
• Reverse acting.
• In-line mounting or can be wall or panel mounted with mounting clip
provided.
• Molded plastic construction with neoprene diaphragms.
RP972A Typical Piping Type: Pneumatic Reversing Relay
Dimensions, Approximate: 1 1/2 in. diameter x 2 1/4 in. deep
(38 mm diameter x 57 mm deep)
Airflow Usage: 0.002 scfm (1.0 mL/s) maximum
Air Connections: Barb fittings for three 5/32 in. (4 mm) and one 1/4 in.
(6 mm) O.D. plastic tubing
Action: Reverse Acting
Capacity: 0.039 scfm at 1 psi differential (18 mL/s at 5 kPa differential)
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)
Accessories:
14003203-003 Conversion Kit to convert Johnson, Powers,
Robertshaw, Barber Coleman and older Honeywell switches
M
M B
THERMOSTAT
DA
3
2
1
4
M
TO MIXING
DAMPERS
RP972A
C4477
N.C.
EXH
Product Number Operation Description Includes
RP972A1006 Output varies inversely with input with an
adjustable offset
Wall, In-line or panel mounted Pneumatic
Reversing Relay
14003030-001, 1 1/2 in. Mounting Clip for
Mounting relay to wall or panel
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