Rp920 Pneumatic Controller; High Capacity - Honeywell Pneumatic Controls Engineering Manual

RP920 Pneumatic Controller

Dimensions in inches (millimeters)
3 (75) MINIMUM CLEARANCE
1/8 (3)
RP920A: 1-1/2 (36)
MINIMUM
RP920B-D: 3-1/4 (83)
SPACING
BETWEEN
RP90A: 1-7/8 (48)
MODULES
RP920B-D: 3-13/16 (96)
Typical Single-Input Control System
RETURN
AIR
DAMPER
ACTUATOR
OUTDOOR
AIR
MIXED AIR CONTROL SYSTEM
5-7/8
(148)
4
(102)
3-3/8 (86)
9/32
(7)
M17581
LIMIT
CONTROLLER
RP920A
4 8 9
R.A.
2 3 1
M
2
3
1
4
RP970A
VENT
2 1
M
3
E-P
1
RELAY
2 4
SP970
MINIMUM
POSITION
REGULATOR
Temperature Controllers
Proportional, high capacity, single or dual input pneumatic
controller used in conjunction with remote sensors to provide
proportional (P) or proportional plus integral (P+I) control of
temperature, humidity, pressure, or dewpoint for heating and air
conditioning systems. Replacement devices are available for
Johnson, Powers, Robertshaw, Barber-Colman, and older
Honeywell controllers.
• Proportional plus integral control option minimizes offset.
• Miniature diaphragm technology provides high degree of accuracy
and reliability.
• Direct Acting models can be converted to Reverse Acting (RA)
function in field.
• Field adjustable compensation start point.
• Local or remote setpoint field option. Integral action cut-off provides
trouble-free automatic startup.
• Transparent cover (optional) provides protection while allowing easy
reading of settings and gages.
• Corrosion resistant construction.
Typical Dual-Input Control System
COMPENSATION
SENSOR (OUTDOOR AIR)
4 8 9
1
2 3
M
VALVE
N.O.
PRIMARY
SENSOR
PRIMARY
CONTROLLER
RP920C
4 8 9 7
IM 5 D.A.
2 3 1 6
M
FROM
FAN
INTERLOCK
PRIMARY
SENSOR
STEAM
SUPPLY
SUPPLY
AIR
HOT WATER CONVERTER
70-6925
M
7
5
6
0.007 IN.
RP920B OR D RESTRICTION
(COIL DISCHARGE)
(TEMPERATURE)
C3361-1
M
CPA
1
2 4
OPTIONAL CPA
MODELS ONLY
4 8 9
RP920A OR C
2 3 1
DA
PRIMARY
M
SENSOR IN HW
SUPPLY LINE
N.O.
TO CONVERTER
CONTROL SYSTEM
C87-2
35