HVAC Products
CC1B7987en
31.10.2002
1/3
7
987
Operating Instructions
KF8806
Test unit KF8806 for use with burner controls LAL... and LFL...
Persons using the KF8806 test unit must be familiar with the control sequence and the different control functions of
burner controls LAL... and LFL...
For detailed information on the burner controls, refer to the relevant Data Sheets (7153 for LAL... and 7451 for LFL...).
These types of burner controls can be tested independent of the burner with which they are used (see diagram A).
The control and checking signals can be picked up at jacks 1...24 to be fed to the KF8888 signal recorder, for
instance.
Diagram A
7987z02/0999
Testing the burner control independent of the burner
·
Plug burner control into the KF8806 test unit
·
Select QRA..., QRB... FE or RAR...with the detector selector, depending on the type of burner control to be tested
·
Toggle switch positions:
«H»
«O»
«bv»
«I»
With LAL2... and LFL1...
«LP»
«P
A
»
Automatic air pressure signal when power is fed to terminal 6
«R»
«O»
«LR»
«30 %»
Low-fire
«SA»
«Z»
Air damper fully closed
Detector
simulation
«AUT»
Automatic flame signal on completion of the 1st safety time
·
Connect test unit to the mains supply (AC 220...240 V / 50...60 Hz)
·
Set switches «H» and «R» to «I» (ON).
Provided the burner control is in proper working order and has not gone to lockout, the startup sequence will now
commence
·
Turn rotary knob of air damper actuator «SA» to «A» as soon as the signal lamp of actuator «SA» starts flashing at
the beginning of the prepurge time.
This simulates the actuator’s FULLY OPEN position and – at the same time – feeds power to terminal 8 so that lamp
«SM» (= synchronous motor of the programming mechanism) lights up
·
Turn rotary knob of air damper actuator «SA» to «M» as soon as signal lamp «SA» starts flashing again on
completion of the prepurge time (simulation of low-fire position «MIN»)
·
On completion of the startup sequence, output control can be simulated with switch «LR». The auxiliary changeover
switch of the actuator feeds power to «BV2».
The signal lamp of the actuator continues to flash until the actuator’s switch changes to position «A» (analogously)
·
Postpurging is triggered by opening the start control loop: Switch «R» set to «O»
Turn rotary knob to «Z» as soon as the signal lamp of actuator «SA» starts flashing, to simulate the air damper’s
FULLY CLOSED position