Pakole ZENIT 70+, User Manual

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ZENIT 70
+
TYPE TUBE RADIANT HEATER
Instructions for Installation and Servicing
Following the switched on voltage the fan operates continuously assuring the 30 seconds pre-purge time. This time period ensures the
three times air change of combustion volume in case of biggest appliance’s power.
When the pressure is suitable - after 30 seconds – the sparking happens and the solenoid valve opens in this way the gas catches fire.
In case during 5 seconds sparking(ignition) the continuous flame shape is stabilized, - and stable electrical signal is come back from the
electrode – the appliance operates and the green control lamp is lighting. During operation of appliance its automatic burner control con-
trols the condition of differential pressure switch and signals coming from the flame control continuously, and if the position of differential
pressure switch is changed – it is switched over from work position to rest – or the signal from the ionization flame control is interrupted
then it stops the gas supply of burner and the appliance gets into error position and red control lamp is lighting placed on the bottom side
of appliance.
8.
Appliance specification
Start, restart
Operation of automatic burner control ( HONEYWELL S4965R)
If the flame control of burner automation does not register flame during the safety time than repeats the all ignition procedure
maximum two times�
If in this time there is not registered flame then it stops the gas supply of burner and the appliance gets into error
position and red control lamp is lighting.
In case during burning process the pressure decreases under the permissible minimal
value on the positive side of air pressure(from the fan side),then automation prohibits:
- gas supply and fan stops
The appliance stands into error position and red control lamp is lighting.
Restart is possible after the switching off and on of mains voltage.
In case during burning process the pressure increases above the permissible maximum value on the negative side of air pressure switch
(from the burner tube side, eg. at combustion back),then it switches back to rest position and the automation prohibits.
- gas supply and fan stops
The appliance stands into error position and red control lamp is lighting.
Restart is possible after the switching off and on of mains voltage .
36. picture: Input and output gas pressure checking connections in case of HONEYWELL solenoid valve
direction of gas flow
Outlet pressure test point Inlet pressure test point
direction of gas flow
direction of gas flow
37.picture: Input and output gas pressure checking connections in case of SIT solenoid valve
Inlet pressure test point
Outlet pressure test point