Honeywell Stereo System P520 Manual De Usuario

9

66-2066—01

Before making definitive settings (i.e., establishing the set 

points) for FLAME ON/OFF, the user must first optimize the 

sighting of the viewing head.  For detailed mounting and 

sighting information, refer to the applicable literature for the 

viewing head used.

The initial settings for the P520 should be as follows:

1. F.F.R.T. (Time Delay Off) to 3 SEC.

2. GAIN SET to 25.

3. TIME DELAY ON to 0.

4. FLAME ON to 200.

5. FLAME OFF to 100.

6. IR GAIN to 451.

7. IR FILTER to 3 (33 Hz).

8. UV GAIN 32.

The above settings will be satisfactory for most applications, 

but are used only as a starting point. Many variables can 

affect the readings making it impossible to catalogue all the 

settings, and each viewing head has its own characteristics for 

the different types of fuels and burners.

The initial settings for viewing heads S509, S511, S512 

should be as follows:

1. Set filter switch to LL position.

2. Gain potentiometers (POTS) full clockwise (these are 

25-turn potentiometers – a slight clicking sound will be 

heard when the POT is maximum clockwise). There are 

two POTs on the S509: one for the Si channel, and one 

for the PbS channel. If the fuel is natural gas, turn the Si 

channel off (pot full counter clockwise).

There are no initial settings for the S506 UV viewing head. It is 

important that this viewing head be properly aimed to pick up 

the maximum signal.

Before adjusting the set points, take readings with the P520 

on the two following conditions; write down the readings for 

the burner ON and OFF (with other burners on) under low 

load conditions, and then the readings for the burner ON and 

OFF under high load conditions.

There must be a definitive ratio between the readings for 

burner ON and burner OFF. This ratio can be defined by using 

the lowest reading for burner ON from both of the load 

conditions, and the highest reading for burner OFF from both 

of the load conditions. If the readings are 2:1 or more (BNR 

ON to BNR OFF) then there should be no problem 

discriminating between burners.

A good balance for the set points would be:

ON SET POINT = .75A + .25B

OFF SET POINT = .25A + .75B

where A is the lowest burner ON reading, and B is the highest 

burner OFF reading.

A smaller ratio will work, as long as the lowest BNR ON 

reading and the highest BNR OFF reading never deteriorates 

to the point the former is equal to or less than the latter. In 

other words, A must always be greater than B. Using a safety 

factor of 2:1 will allow for flame signal changes that probably 

will occur over different operating conditions.

The model S55XB/BE series of viewing heads have in place a 

sensor for sensing the internal temperature of the head. To 

access the reading of the viewing head temperature, press the 

“Reset” and the “Down” arrow key at the same time. The 

temperature reading will be displayed in the four-digit readout. 

The reading (indicated in °C) will disappear and the normal 

reading will continue after several seconds.