• Dual limit aquastat

• Altitude pressure and temperature gauge

• Safety relief valve (unmounted)

• Circulator relay and heater contactors

• Circuit breaker (one or two heaters per breaker)

• Low voltage thermostat with adjustable heat anticipator

(packed separately)

• Drain cock, ¾" (packed separately)

• Built-in air separator

• Cast-iron ASME approved heat exchanger

• Terminal blocks for circulator, thermostat, flow switch and

for zone valve transformer

• Sequencer

• Complete jacketing

• U.L. listed, ASME authorized

• Flow switch. Not included with, but necessary on all models

• Circuit breaker for circulator and control circuit