Strebel S-HQ, Руководство по установке

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Installation Instructions Strebel Q-boiler range
10
6 Connecting the boiler
The boiler has the following connection pipes;
-
The central heating pipes.
These can be connected to the installation by means of compression fittings;
- The gas pipe.
It is provided with a female thread into which the tail piece of the gas valve can be
screwed;
- The condensation drain pipe.
It consists of an oval 24 mm plastic pipe. The drain pipe can be connected to this
by means of an open connection. If the open connection is fitted in a different
location, then the pipe can be lengthened by means of a 32 mm PVC sleeve;
- The flue gas exhaust system and air supply system.
It consists of a concentric connection 80/125 mm.
- Cold and hot water pipes.
Only Combi boilers: These consist of 15 mm copper pipe and can be connected
to the installation by means of compression fittings.
It is recommended that isolation valves are fitted to all heating and hot water
connections to facilitate ease of future maintenace.
It is advisable to spray-clean all of the unit’s connecting pipes and/or to
spray-clean/blow-clean the installation before connecting it to the unit.
6.1 Central heating system
Connect the central heating system according to the actual regulations.
The boiler pipes can be connected to the installation by means of compression fittings.
Reducers should be used for connecting to thick-walled pipe (welded or threaded).
When removing the plastic sealing caps from the pipes, contaminated testing
water can be released.
The boiler has a self-adjusting and self-protecting control system for the load and the pump
capacity. By this means the temperature difference between the flow and return water is
checked. Table 3 shows the water displacement which supplies the circulation pump at
certain installation resistance.
A low velocity header must be connected to the Q51C, Q51S and Q60S to
prevent flow problems over the boiler.
STREBEL supplies the AA1OV09U Low velocity header for 1 boiler. This can be
connected directly under the boiler on the flow and return pipe.
Boiler type pump type water flow rate permissible installation
resistance
UPER l/min l/h kPa mbar
Combi
Q25C 20-60 16,2 972 29 290
Q38C 20-70 24,6 1478 20 200
Q51C 20-70 30,1 1803
Solo
Q25S 20-60 9,7 583 47 470
Q25S 20-60 16,2 972 32 320
Q38S 20-70 24,6 1478 22 220
Q51S
20-70 30,1 1803
Q60S
20-70 38,9 2333
Installation resistance table 3