Viessmann KOB Pyrot KRT Series Technical Data Manual page 19

Pyrot Technical Data
Pneumatic Cleaning System
Description
Pneumatic Cleaning System (for Pyrot KRT-150)
Pneumatic Cleaning System (for Pyrot KRT-220)
Pneumatic Cleaning System (for Pyrot KRT-300)
Pneumatic Cleaning System (for Pyrot KRT-400)
Pneumatic Cleaning System (for Pyrot KRT-540)
The complete heat exchanger is cleaned off by periodic
blasts of compressed air while the system is in regular
operation. During the cleaning process the individual
sections are blasted clean one after another.
The ash on the heat exchanger tubes is detached by very
short but strong blasts of air. The particles detached are
conducted by the flow of gas to the de-duster, where
most are filtered out and collected. The system is built
into the rear side of the boiler. The compressor should
preferably be installed in a cool spot in the heating room.
Technical data
Boiler Model
Number of zones/valves
Size of the valves
Max. air consumption at full load USG/h (L/h)
A customer supplied air compressor has to deliver at
least the quantity and quality of air specified and have
an adjustable pressure controller as well as a safeguard
against hose rupture (e.g. operating time limiter).
Function of the control system:
The number of cleaning cycles within one time unit (e.g.
per hour) is adapted to the load of the boiler.
One individual, complete cleaning cycle consists of a
series of pressure impulses over all the sections of the
heat exchanger.
Supplied with:
- Nozzle element integrated in the exhaust gas collector,
incl. connection piece with heat dissipation plates
- Compressed air distributor with container and valve;
with high-temperature hoses connected to the nozzle
element
- Compressor (optional) with the following specs:
Delivery capacity of 11.3 CFM (0.32 m3/min); tank:
60 USG (227 L); pressure: max. 135 psi; motor: 3 HP,
1200 RPM, 230V, includes pressure controller,
pressure switch and operating time limiter; plug and
play; noise level of normal design: 75 dBA
- Compressed air hose to max. of 13 ft (4.0 m) in length
and ¾" in diameter
- Valves permanently wired on terminal strip
- Software component in the control system
To be carried out by the customer:
- Provide a power supply, 120V or 230/1/ 16A
KRT- 150 220
4
G 1" G 1"
343 (1300) 660 (2500) 660 (2500)
300
4 4
G 1"
872 (3300)
Mechanical
400 540
5 6
G 1" G 1"
1189 (4500)
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