Installation and Service Manual Epsilon-Series
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 supplied gas isolation
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.
It is recommended that isolation valves are fitted to all heating and hot water
connections to facilitate ease of future maintenance.
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 may 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 6.1.a shows the water displacement which supplies the circulation pump
at certain installation resistance.
A low velocity header must be connected to the EB 50 to prevent flow problems
over the boiler.
A.O. Smith supplies the low velocity header for 1 boiler with art.nr. 0310372. This can
be connected directly under the boiler on the flow and return pipe.
Boiler type
Pump type
UPM2
l/min
l/h
kPa
mbar
EB 40
20-70
24,6
1478
20
200
EB 50
20-70
Low velocity header required
Permissible installation
restistance
Water flow rate
Installation resistance
table 6.1.a