2000 Hook-up Book

Figure II-29 Storage Cylinder with High Limit Protection

Fail safe protection against excess temperatures is provided by a separate con trol valve, normally latched wide open. If the 130 self-acting control system detects a temperature overrun, or if the control system itself is damaged, a pow erful spring is released in the HL10 unit and the high limit valve is driven closed. A switch is available as an extra to provide electrical warning that the device has been actuated.

Self Acting Temperature Control

Moisture Separator

Vacuum Breaker

Valve

Strainer

Hot Flow

Steam Supply

HL10 Overheat Protection

High Limit 130 Sensor

Spira-tec Loss Detector

Temperature Control Sensor

Strainer

HOOK-UP DIAGRAMS Float & Thermostatic Steam Trap

Storage Tank

Circ. Return

Spira-tec Loss Detector

Check Valve

Cold Supply

Strainer

Float & Thermostatic Steam Trap

Figure II-30 Condensate Drainage from Unit Heater

Steam Supply

Note: The Liquid Expansion Steam Trap will automatical ly drain unit heater during periods of shutdown which will prevent damage due to corrosion.

Unit Heater

To Overhead Return

Float & Thermostatic Steam Trap

Spira-tec Loss Detector

Drain condensate by gravity where possible— especially to vac. return system

Check Valve

Strainer

Liquid Expansion Steam Trap

Liquid Expansion Steam Trap

Alternate Location

To Condensate Return

To Drain

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