Справочник Пользователя для Sapphire Audio DV425TR

02/01                                                                                     Page 54                                                                               250-5533

Pilot will not light. 

Air in Gas Lines.   

Bleed air from Gas Line.

 

 

 

Wrong Inlet Pressure. 

Check Gas Line pressure (7” Nat., 11” L.P.). 

 

 

 

Defective Spark   

Replace Electrode if the Insulator is cracked or the Tip is 

 

 

 

 

Electrode. 

corroded.  Verify that the Spark Gap between the Pilot and 

 

 

 

 

 

 

the Electrodes correct.

 

 

 

Defective Piezo Wire. 

Replace Piezo Wire if Insulation is damaged, broken, or

 

 

 

 

 

 

corroded.

 

 

 

Safety Interlock   

Allow Thermocouple to cool until the mV drops below the

 

 

 

Function engaged. 

hold - in requirements of the Safety Magnet (30 seconds or

 

 

 

 

 

 

less).  Relight Pilot.

Pilot will not hold. 

Wrong Inlet Pressure. 

Check Gas Line pressure (7” Nat., 11” L.P.). 

 

 

 

Pilot Adjustment Screw 

After the Pilot has been lit for approximately [3] min., and only

 

 

 

not adjusted properly. 

the Thermo-generator wires connected to the Main Operator 

 

 

 

 

 

 

Head, measure the voltage across TPTH and TP.  This Open

 

 

 

 

 

 

Circuit voltage should be between 500mV and 750mV.  Tune

 

 

 

 

 

 

the Pilot Adjustment Screw until the  mV  reading falls within

 

 

 

 

 

 

these parameters.  Counter-clockwise increases the mV 

 

 

 

 

 

 

reading, Clockwise decreases it.  Turn with a Wrench.  

 

 

 

Thermocouple or   

With the Thermocouple and Thermo-generator Tips cool, 

 

 

 

Thermo-generator has 

clean the upper 3/8” with a very fine Emery cloth.

 

 

 

Film build-up on Tip. 

 

 

 

Electrical Resistance 

Using a very fine Emery cloth, clean the Thermo-generator 

 

 

 

too high.  

 

and Thermocouple connections at the Valve.  Tighten    

 

 

 

 

 

 

Thermocouple into Valve, hand tight, adding a 1/4 turn

 

 

 

 

 

 

with a wrench.

 

 

 

Defective  

 

Verify that the  Thermocouple  is not kinked or damaged.  

 

 

 

Thermocouple.   

Check Open-Circuit voltage of Thermocouple.  Voltage should 

 

 

 

(mV Plus System) 

be between 18mv and 28mv.  If voltage is less than 14mv,

 

 

 

 

 

 

replace the Thermocouple.

 

 

 

Defective Thermo- 

After the Pilot has been lit for approximately [3]  min.,and only

 

 

 

generator. 

 

the Thermo-generator wires connected to the Main Operator H

 

 

 

(millivolt System)   

Head, measure the voltage across TPTH and TP.  This Open

 

 

 

 

 

 

Circuit  voltage should be between 500mV and 750mV.  Tune

 

 

 

 

 

 

the Pilot Adjustment Screw until the mV reading falls within

 

 

 

 

 

 

these parameters.  Counter-Clockwise increases mV reading, 

 

 

 

 

 

 

Clockwise decreases it.

 

 

 

Defective Safety Magnet  Verify operation of Safety Magnet in the following manner:

 

 

 

(mV Plus Systems). 

(A) Depress and hold the Pilot Button.

 

 

 

 

 

 

(B) Verify Open-Circuit Thermocouple voltage as described

 

 

 

 

 

 

      in previous Step.

 

 

 

 

 

 

(C) Reconnect Thermocouple to the Valve.