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Building Technologies CC1N7761en
HVAC Products 19.02.2007
Adjustment facilities on the unit
• Before making any adjustments, disconnect the unit from the mains supply
• Loosen all 6 retaining screws and only remove the unit cover
• The numbering of the switching cams always starts from the motor
• The camshaft can be manually turned into any position (clockwise direction of rota-
tion as seen from the motor)
UL1 N1 N2N3 N4 N5 N7 N8 PA
7761p03/0201
Setting elements:
N1 Cam 1, fixed
N2 Cam 2, adjustable (1st safety time)
N3 Cam 3 adjustable (1st safety time)
N4 Cam 4, fixed
N5 Cam 5, adjustable (2nd safety time)
N7 Cam 7, fixed
N8 Cam 8, adjustable (prepurge time)
PA Program indicator
UL1 ON / OFF switch for the motor of the switching
mechanism
On the rear side of the base:
UL2 Changeover link for «Short / long preignition», in
position «Short preignition» locked with varnish
UL3 Changeover link for «STOP» of the control
sequence following lockout or «restart». Only
the fan for postpurging connected to terminal 17
remains energized
Adjusting the preignition time
D
C
7761p09/0696
C «Long preignition time» (during prepurging)
D «Short preignition time» (3 s, factory setting)
Loosen the screw before making the adjustment and then
tighten it carefully.
Adjusting the prepurge time t1»
- Loosen the fixing screw of the red cam N8
- Turn camshaft manually until the required prepurge
time is indicated next to the index notch on the car-
rier of the programming mechanism
- Hold camshaft firmly and rotate cam N8 until the
contact tappet operated by it just jumps out or the
cam strikes this tappet
- Carefully tighten the fixing screw of the cam and
check the adjusted time for accuracy. The set time is
also visible in the viewing window, if the unit is in its
start position
Adjustment of the mark of the red cam N8 to the gradua-
tion marks of the black cam N7 results in the prepurge
times given in the opposite table.
Ι ΙΙ ΙΙΙ
N7
N8
7761p04/0698
Adjustment to t1
Graduation mark I 8 s
Graduation mark II 18 s
Graduation mark III 28 s
Adjustment at stop 63 s
Facory setting approx. 30 s or 60 s
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