Hydraulic Connections; Dimensional Information Required; Important Recommendations For Connecting The Boiler To The Heating Circuit - OERTLI PK 550 Installation And Service Manual

4.3 Hydraulic connections

4.3.1

Dimensional information required

Draining outlet 3/4''
Heating return:
- 9 to 17 sections: 139.7 - 5"
- 18 to 25 sections: 159 - 6"
weld.
PK
PK
Boiler
550-
550-9
10
C (mm) 1488 1488 1488 1488 1488 1488 1488 1488 1488 1504 1504 1504 1504 1504 1504 1504 1504
D (mm) 212 233
H (mm) -7 14
4.3.2

Important recommendations for connecting the boiler to the heating circuit

Installation must be carried out in accordance with the prevailing regulations, the codes of practice and the recommendations in these
instructions.
France:
Heating installations must be designed and constructed in such a way as to prevent the return of water in the heating circuit and the products
put into it into the drinking water network located upstream; The installation must not be connected directly to the drinking water network (article
16-7 of the local health directive). When these installations are fitted with a filling system connected to the drinking water network, they comprise
a CB disconnector (disconnector for zones with non-controllable pressure differences) which satisfy the functional requirements of the NF P
43-011 standard.
Minimum safety valve flowrate as a function of maximum boiler nominal output:
Minimum relieving capacity
Maximum gross boiler output
(a) = kW, (b) = lb/h, (c) = MBtu/h, (d) = Kg/h
18/03/2016 - 300020192-02
PK PK PK PK PK
550- 550- 550- 550- 550-
11 12 13 14 15
234 255 256 217 188
15 36 37 -2 -31
Heating flow:
- 9 to 17 sections: 139.7 - 5"
- 18 to 25 sections: 159 - 6"
weld.
* dimension without connection (see figure on chapter Boiler location,
straight or angled connection).
PK PK PK PK PK
550- 550- 550- 550- 550-
16 17 18 19 20
189 210 236 257 208
-30 -9 -8 13 -36
Example
Maximum boiler nominal output is 800 kW.
Minimum safety valve flowrate must be 2600 Kg/h.
There must be no total or partial closing mechanism
between the boiler and the safety valves (France: DTU -
65.11, § 4.22 - NF P 52-203).
PK 550
PK PK PK PK PK
550- 550- 550- 550- 550-
21 22 23 24 25
209 230 231 252 253
-35 -14 -13 8 9
4. Installation
13