CONTROL ACCESSORY TYPE: UZ 49

The Control Accessory is used for power-dependent, cyclic all-round control of Rekumat burners or radiant tubes in gas-fired furnaces. The burner on time is kept constant for all-round operation and the burner OFF time is adapted to the momentary power requirements.

This technique improves the efficiency of the furnace, produces a uniform furnace room temperature and a constant furnace room pressure. Output circuits and relays are accommodated in one or two accessory housings ZUZ 49… of the same construction.
The two units are connected by a pluggable bus cable.

SPECIAL FEATURES:

  • Connection to continuous or noncontinuous temperature controllers
  • Triggering of up to 12 burners
  • Screw-type and mounting rail fastening
  • Overtemperature input
  • Adjustable burner on time

UZ for connection to a non-continuous controller

Construction:

Plastic housing with open terminals alternatively with screw fastening (DIN 46121) or mounting rail fasten- ing (DIN 46277)

Dimensions:

150 x 70 x 112 (lxwxh)

Auxiliary voltage:

24 Vac ± 10 % / 50-60 Hz

Input:

Control contact (working contact)
Overtemperature contact (rest contact)
The contacts must be potential-free and are loaded with approx. 20 mA. (Lay lines with shield and earth shield on controller side only.)

Output:

In connection with supplementary unit 6 burner connections (1 ZUZ 49…) 12 burner connections (2 ZUZ 49…) (1 working contact per connection for the solenoid valve “Gas” and “Air”). The contacts are potential-free and can be loaded with a max. 8 A/250 Vac.

Times:

Burner ON time in continuous operation: adjustable 10…35s special model: 20…70 s
Air lag time: rinse time after gas OFF: adjustable 0.3…2 s
Overtemperaturemonitoring: Allburnersareswitchedoff5safter overtemperature signal.

Power consumption:

with 12 burners approx. 36 VA

Perm. ambient temperature:

0…50 °C

Displays:

LED operation
LED all-round operation
LED controller contact ON
LED overtemperature ON

UZ for connection to continuous controllers

Construction:

Plastic housing with open terminals alternatively with screw fastening (DIN 46121) or mounting rail fasten- ing (DIN 46277)

Dimensions:

150 x 70 x 112 (lxwxh)

Auxiliary voltage:

24 Vac ± 10 % / 50-60 Hz

Input:

20…0 mA (100% ED = 20 mA) or 0…20 mA (100% ED = 0 mA) Overtemperature contact (rest contact) The contact must be potential-free and is loaded with approx. 20 mA. (Lay lines with shield and earth shield on controller side only.)

Output

In connection with supplementary unit 6 burner connections (1 ZUZ 49…) 12 burner connections (2 ZUZ 49…) (1 working contact per connection for the solenoid valve “Gas” and “Air”). The contacts are potential-free and can be loaded with a max. 8 A/250 Vac.

Times:

Burner ON timeincontinuousoperation: adjustable 10…35 s
special model: 20…70 s
Air lag time
rinse time after gas OFF:
adjustable0.3…2s
Overtemperaturemonitoring:
All burners are switched off 5 s after an overtemperature signal.

Power consumption:

with 12 burners approx. 36 VA

Perm. ambient temperature:

0…50 °C

Displays:

LED operation
LED all-round operation
LED overtemperature ON
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