Bonus Plus Instructions Tarm Biomass 1-800-782-9927 Version 11/14 Page 25
Boiler Installation & Start-up > Commissioning the Boiler
A thermostatic
mixing valve
or
loading unit
, and boiler circulator (included with the loading unit )
should be incorporated into the heating system piping as shown in
Fig. 3.11.
When the
K4440A3
is
used, a ball valve (not provided) must be installed upstream of Port 1 of valve
TV-1
. The valve should
be set at half open (and the handle removed), in order for the tempering loop to function correctly. If
accessory
K4440A3
Termovar mixing valve is provided for use as
TV-1
, the unions supplied with the
valve have internal valves which must be fully open.
3.5.2 Filling and Venting
The best connection for filling the boiler with water is at the boiler drain. During filling the circulation
pump is switched off. Filling takes place through a hose which is screwed onto the boiler drain and
connected to a water supply faucet. Fill the hose prior to filling the boiler, otherwise air in the hose
will be pushed into the boiler system. Remove the hose after filling up. High quality air elimination
equipment is recommended in the heating system installation.
NOTE
The heating system main supply and return piping will need to be at least 1.25” (32 mm) for
correct boiler heat output distribution. All field-run piping should be back-flushed to clean and
remove debris. Adequate filling and venting ports should be added so that air can be removed
from the system.
The system should be pressure tested before being placed into service.
NOTE
If water quality is poor or PH unsatisfactory, the installer should consider water treatment ad-
ditives during filling and water testing as part of annual maintenance.
1
2
Automag
Zone Valve
C-3
1"
1"
1¼"
3
Termovar Option 2
Automag
Zone Valve
1"
1"
Termovar
Loading Unit
Feed
TV-1
Feed
Supply
Return
1¼"
1¼"
Wood Boiler
1¼"
Balancing Valve
Supply
Return
Typical Plumbing Schematic
Fig. 3.11
Содержание Bonus Plus 30
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