Brochure

123
Selection Guides
Hoffman Specialty
®
Selection Guidelines
F&T
Trap
Y Strainer
Heated
Water
Return
Circulating Pump
Main Valve
Check
Valve
Heated
Water
Feedback Line
Steam
Inlet
Cold Water
Air PRV
Regulator
Air
Pilot
Instantaneous
Heater
Y Strainer
15" min. (381mm)
to Gravity
Return
Power Supply
Controller
Temperature
Sensor
Electronic
Pneumatic
Transducer
Max. air Pressure to
Temp. Pilot is 36 PSIG
Cold
Water
F & T
Trap
Circulating Pump
Water Circuit With
Recirculating Loop
Flow Switch
Main
Valve
Combination:
Solenoid
Temperature Pilot
Spring Pilot
Feedback
Line
Feed
Line
Remote Switching
Power Supply
Y Strainer
HEAT EXCHANGER
Steam
Supply
Y Strainer
Vacuum
Breaker
Hot Water Out
Automatic Control of Heat Exchanger with High Limit Safety Control
Electronic-Pneumatic Temperature Pilot for Instantaneous Heater Recirculation System
Description: Adding a “Normally
Closed” Solenoid pilot can provide
electrical override. They may be
wired into flow switches, aquastats,
timers, or manual switches.
Description: Electronic-pneumatic pilots provide fast
accurate temperature and pressure contr
ol. They also
enable the control circuit to be interfaced with a
computer for easy system monitoring or temperature
adjustment.
Series 2000 Typical Applications(continued)