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2.10 Draining the condensate
RTC-80 condensing boilers produce a flow of condensate that var-
ies according to operating conditions.
The maximum hourly production of condensate for each model is
given in the table in the paragraph Neutralizing the condensate.
The condensate drain system must be suitably dimensioned to
cope with the flow produced. Also, pipe and hose diameter must
not be less than 1" for RTC-80 1000 ÷ 1300 and 1-1/4" for RTC-80
1700 ÷ 5500 at any point. This diameter corresponds to that of the
boiler's condensate drain fitting (7).
Collection and connection to the drain system must conform to
applicable national and local codes.
To prevent combustion fumes from leaking into the air of the boil-
er room, the condensate drain pipe must incorporate a siphon
creating a minimum head equivalent to the furnace pressure plus
1" W.C..
The connecting pipes between the boiler, siphon and waste water
drain pit must be laid at a minimum down slope of 3° and must
be installed in such a way as to prevent any build-up of conden-
sate.
≥3°
7
≥3°
Pcc (in inch W.C.) + 1"
2.11 Neutralizing the condensate
Installation of a condensate neutralization kit is always recom-
mended. The following table states the rate of condensate flow
produced by the boiler.
Condensate
Model
Production
RTC 1000-80
RTC 1300-80
10.80
RTC 1700-80
13.78
RTC 2300-80
19.49
RTC 3000-80
23.24
RTC 3800-80
29.42
RTC 4700-80
35.05
RTC 5500-80
42.13
At full load with Tin=86°F and Tout=122°F
9
All connecting hoses must be kept as straight and as short as
possible. Any curves or sharp bends can lead to the hoses be-
coming clogged and can therefore prevent proper condensate
discharge.
9
Refer to the manual supplied with the kit for installation and
connection instructions.
9
NOTICE: The boiler room's condensate drain pit must be locat-
ed at a lower level than the fitting on the neutralization unit.
If it ever proves necessary to neutralize the condensate that forms
in the flue gas stack, connect the condensate drain fittings of the
boiler and flue gas stack together using a 'T' union and connect
the leg of the 'T' to the inlet of the neutralization unit.
35
Condensate
Production
8.42
GPH
31.9
GPH
40.9
GPH
52.2
GPH
73.8
GPH
88.0
GPH
111.14
GPH
132.7
GPH
159.5
INSTALLATION
l/h
l/h
l/h
l/h
l/h
l/h
l/h
l/h
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