Unigas HP91A, Manual Of Installation - Use - Maintenance

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(1) input for raising QRA detector voltage to test level
(2) input for excitation of flame relay during flame detector test
circuit (contact XIV) and during safety time (contact IV)
(3) Do not press EK for more than 10 seconds
Programmer diagram
t1 pre-ventilation time
t2 safety time
*t2 '1st safety time
t3 pre-ignition time
*t3 'pre-ignition time
t4 interval for creating current between terminals 18 and 19
*t4 'interval for creating current between terminals 17 and 19
t5 interval for creating current between terminals 19 and 20
t6 post-ventilation time
t7 interval between startup consent and current created at
terminal 7
t8 duration of start-up
*t9 2nd safety time
t10 interval before air pressure monitoring begins
t11 damper opening travel time
t12 damper closure travel time
t13 permissible post-combustion time
t16 initial delay of damper OPEN response
t20 interval before programmer automatically stops
* These times are valid with the use of a series 01 safety device for moni-
toring burners with intermittent pilot lighter.