Cleaver-Brooks Profire E Series, Установка, эксплуатация и обслуживание, Страница: 21 / 84

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Profire E/LNE Series Manual 1-7
Introduction
FIGURE 1-4.
Main Gas Train (Model E84 - E105)
Component Description
Gas Volume Valve The butterfly-type valve is positioned by linkage from the modulating motor and
controls the rate of flow of the gas.
Main Gas Valves Electrically operated safety shutoff valve(s) that open to admit gas to the burner.
Standard U.L. burners include:
•
Models E84-105: One motorized gas valve w/closure interlock and one solenoid
valve.
• Models E126-630: Two motorized gas valves, one w/closure interlock.
Main Gas Regulator Regulates gas train pressure to specified pressure required at inlet to the gas train.
Input is set my the main gas pressure regulator adjustment.
Main Gas Cocks For manual shutoff of the gas supply upstream of the pressure regulator. A second
shutoff cock downstream of the main gas valve(s) provides a means of testing for
leakage through the gas valve(s).
High Gas Pressure Switch A pressure actuated switch that remains closed when gas pressure is below a pre-
selected setting. Should the pressure rise above the setting, the switch contacts will
open causing main gas valve(s) to close. This switch requires manual reset after
being tripped.
Low Gas Pressure Switch A pressure actuated switch that remains closed when gas pressure is above a pre-
selected setting. Should the pressure drop below this setting, the switch contacts will
open, causing main gas valve(s) to close. This switch requires manual reset after
being tripped.