HVAC Controls, Pneumatic • Relays and Control Modules
Solenoid Air Valves AL-17x Series, AL-18x Series
Solenoid Air Valve AL-19x Series
Model chart
Model no. item
open Frame
AL-170 AL-171
J-Box
AL-180 AL-181
H
AL-181-201ª AL-182 AL-183 AL-185
TAC Pneumodular®
Diverting Relays R503 Series (2353-5xx Series)
24
120 120 208 240 480
TAC Pneumodular®
Diverting Relays R504 Series (2354 Series)
24 120 Voltage (ac 60 Hz) item
AL-190 AL-191 AL-192 AL-193 AL-195
Model chart
Voltage (ac 60 Hz) +10/-15% 24
120 208 240 480
item
switching action
R503-1 Port S at setpoint minus diff.: ports NO and C are connected. Port S at setpoint: ports NC and C are connected.
R503-2 Port S at setpoint minus diff.: ports NO and C are connected. Port S at setpoint: ports NC and C are connected.
R503-3 Port S2 is approx. 0.3 psi (2.1 kPa) greater than port S: ports C and NO are connected. Port S greater than or equal to that at Port S2: ports C and NC are connected.
654
item
action
R504-1 Below 4 psig: NO and C are connected. Above 8 psig: NO and C are connected.
R504-2 Below 16 psig: NO and C are connected. Above 20 psig: NC and C are connected.
R504-3 Below 4 psig: NO and C are connected. NO2 and C2 are connected. Above 8 psig: NC and C are connected. NC2 and C2 are connected.
R504-4 Below 16 psig: NO and C are connected. NO2 and C2 are connected. Above 20 psig: NC and C are connected. NC2 and C2 are connected.
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