Crestron electronic 2.5 Manual De Usuario

      

Installation & Operation Manual

 

Provides access to the controls compartment.

 

Provides access to the burner compartment.

 

The air pressure switch detects blocked flue/vent conditions.

 

The blowers pull in air and gas through the venturis (item 

 

34).  Air and gas mix inside the blowers and are pushed into the 

 

burner, where they burn inside the combustion chamber.

 

Location from which the heat exchanger can be drained.

 

The boiler inlet temperature sensor monitors system return 

 

water temperature.  If selected as the controlling sensor, 

 

the control module will adjust the boiler firing rate so the inlet 

 

temperature matches the set point.  

 

The boiler outlet temperature sensor monitors boiler outlet 

 

water temperature.  If selected as the controlling sensor, 

 

the control module will adjust the boiler firing rate so the outlet 

 

temperature matches the set point.  

 

Integral dual chamber design with a stress free metal fiber 

 

outer mesh and durable stainless steel structure.  Provides two 

 

(2) independent firing rates up to 25:1 turndown. 

 

The condensate drain connection provides a connection 

 

point to install a condensate drain line using flexible hose 

 provided.

 

The control module responds to internal and external signals 

 

and controls the blowers, gas valves, and pump(s), depending on 

 

the application, to meet the heating demand.

 

Digital controls with SMART TOUCH  screen technology, full 

 

color display, and an 8" user interface screen.

 

Two large high temperature quartz observation windows 

 

provide views of each independent burner surface during 

 firing.

 

The dual flame sensors are used by the control module to detect 

 

the presence of a burner flame at both independent burner 

 surfaces.

 

The flue sensor monitors flue gas temperature.  The control 

 

module will modulate or shut the boiler down if the flue gas 

 

temperature gets too high.  

 

The gas connection pipe is a threaded black iron pipe 

 

connection (see Gas Connections Section for specific model 

 

pipe size requirements).  This pipe should be connected to the 

 

incoming gas supply to deliver gas to the boiler.

 

The manual gas shutoff valve is used to isolate the boiler gas 

 

train from the gas supply.

 

The gas valves sense the negative pressure created by the 

 

blowers, allowing gas to flow only if the gas valves are powered 

 

and combustion air is flowing.

 

Prove adequate airflow during prepurge.

 

The high limit devices are used to monitor the outlet water 

 

temperature - if either device senses the water temperature 

 

exceeding the predetermined setting, the boiler will shut down.  

 

An electrical spark across the electrodes will ignite the first 

 burner.

 

The line voltage junction box contains the connection points for 

 

the line voltage power to the boiler (and pumps if used).

 

Conduit connection points for the high voltage junction box.

 

Monitors gas supply pressure to the boiler and shuts the boiler 

 

down in the event a low gas pressure condition occurs. 

Monitors gas supply pressure to the burner and shuts the boiler 

 

down in the event a high gas pressure condition occurs. 

 

Connection boards used to connect external low voltage devices.

Conduit connection points for the low voltage connection boards.

 

Ensures adequate water is supplied to the boiler.  In the event of 

 

inadequate water levels, the boiler will shut down.

The On/Off power switch provides the ability to turn line voltage 

 

power to the boiler on and off.

 

The safety relief valve protects the heat exchanger from an over 

 

pressure condition.  The boiler comes with a 50 PSI relief valve as 

 

standard equipment.  Optional settings are available.

 

Reset switch for the low water cutoff.  Hold the switch for 10 

 

seconds to reset.

 

The test switch permits manual triggering of the LWCO 

 

safety circuit to test the contacts and evaluate the integrity of the 

 

circuit. Hold the switch for 10 seconds to test.

 

High grade stainless steel WAVE

TM

 firetube design that extracts 

 

heat from flue gases and transfers it directly into boiler water.

 

Monitors the outlet temperature of the boiler as well as the system 

 water 

pressure.

 

Separate venturis control air and gas flow into two (2) independent 

 burner 

sections.

 

A 4" ANSI flange connects the return water from the system to the 

 heat 

exchanger.

 

A 4" ANSI flange connects the hot water supply from the boiler to 

 the 

system.

 

The transformer provides voltage to the ignition electrode (item 

 20).

 

Monitors fuel-air delivery temperature to the burner.

 

Used with room air for combustion and to prevent debris from 

 

entering the boiler.