Meco Pellematic PES 12-20, Руководство по установке

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Prerequisites for installing a pellet boiler
10
5.3 Flue gas system
The flue gas system consists of a chimney and a flue gas tube. The flue gas tube connects the pellet heating system to
the chimney. The chimney leads the flue gas from the pellet heating system out into the open.
1. Design of the chimney
The dimensions and design of the chimney is very important. The chimney must be able to ensure sufficient draft to
safely draw away the flue gas regardless of the status of the boiler. Low flue gas temperatures can cause sooting
and moisture damage on chimneys that are not insulated. For this reason
moisture-resistant chimneys (stainless
steel or ceramic) should be used. An existing chimney that is not damp-resistant needs to be rennovated before
use. Follow guidelines below:
Boiler size PE(S) 12 – 20 PE(S) 25 – 32 PE(S) 36 – 56
Flue gas tube diameter (at boiler) in 5 6 7
Flue gas temp. / rated power °F
320 320 360
Flue gas temp. / partial load °F 212 212 230
Min. draft – full load/part load in/wc 0.03/0.01
Chimney size Min. Height
6”x6” 17ft
7”x7” 16ft
8”x8” 16ft
6” round 19ft
7” round 17ft
Recommended and UL-103HT approved chimney materials are:
a. Selkirk sure temp
b. Supervent (JSC)
c. Security chimneys (secure temp ASHT)
Use heavy gauge (26ga or better) black smoke pipe to connect to existing chimney
Unregulated combustion
Please observe that combustion air openings and flue pipes
are not reduced in size or closed. Make end user aware of
these guidelines and their potential danger.
2. Flue gas temperature
The flue gas temperatures are the same for all boiler types:
The dewpoint of flue gas with wood pellets (max. 10% water content) is approx. 120°F.
It is possible to increase the flue gas temperature to prevent condensation inside the chimney and avoid damage
due to damp. Only authorised specialist personnel may increase the flue gas temperature.
Note:
The increase in flue gas temperature results in reduced efficiency and thus increases fuel consumption.
Installation Manual PES 36–56 PE 3671 USA 2.3