DriSteem Vapor-Logic Instalační příručka stáhnout pdf (Strana 57)

DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 55

Safety systems

The GTS humidifier has a number of systems and safeguards to

ensure proper operation.

• When there is a call for humidity, all of the combustion blowers

must start. Each combustion blower sends a signal to the

microprocessor relaying its current speed. If this actual speed is

outside an acceptable range, the GTS will not operate.

• The negative pressure gas valves used on the GTS are designed

to keep a constant ratio of air and gas throughout the operating

range of the blower. If the flue becomes blocked or the

blower fails to run, the blocked flue sensor will shut down the

humidifier.

• During operation, the water level in the tank is monitored by a

probe system for standard water units and by a low water float

for DI/RO units. These water monitors tie into the Vapor-logic4

controller. If the water level drops below a safe point, the

controller turns heaters off and tries to fill. If humidifier is unable

to fill within a defined time period, an “Excessive refill time”

alarm appears in the Vapor-logic4 Alarm Log. The heaters will

remain off until this alarm is cleared. (For more about alarms, see

the Vapor-logic4 Installation and Operation Manual.)

• In standard water applications, the water level in the tank is

also monitored by a redundant low-water system that runs

independently of the Vapor-logic4. This system is tied directly

into the power source for the gas valves. If this system detects

a low water condition, the humidifier shuts down until water is

present or until the a “GTS low water” alarm is cleared from the

Vapor-logic4 Alarm Log.

• In addition to monitoring the water level, there is a temperature

sensor located near the top of the heat exchanger. If the water

level drops too low and both the main and redundant low water

sensors fail to detect it, the temperature sensor shuts down the

humidifier before an unsafe condition occurs.

O p e r a t i o n : S a f e t y s y s t e m s

Operation

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DriSteem Vapor-Logic Instalační příručka Strana 57