Installation Of Hydronic Control Components - Buderus G315 Assembly, Maintenance And Operating Instruction

10 Installation of Hydronic Control Components

Installation of supply header and controls
NOTE: The G315 boiler can be equipped with 2" or 3" supply/return connections depending on items
ordered. The 3" supply manifold is suitable for commercial installations.
• Refer to Figure 37 for details on the 3" supply header for use in commercial installations
requiring multiple aquastats.
• Secure supply manifold with supplied nuts and gasket to supply connection in desired
orientation.
• Secure return flange/manifold with gasket to return connection.
• Install low water cut-off probe and P&T gauge in appropriate tappings (3" header only).
* Install relief valve after performing the hydrostatic test.
• Pipe the relief valve discharge to a floor drain in accordance with local code requirements.
• Install required number of 3/4" immersion wells in 3" supply header tappings.
NOTE: If a Buderus Ecomatic is used, install the Ecomatic well and the Ecomatic sensors in the
rear boiler tapping.
• Install the L8148A aquastat in rear boiler tapping.
• Install the supply temperature control aquastat (if required) in a 3/4" tapping.
• For commercial installations, install the L4006E1109 manual reset in the rear boiler tapping.
• Install L4006A1058 operating aquastat in another 3/4" immersion well of 3" the supply manifold.
(Install second L4006A1058 aquastat for Low/Hi/Low burner operation).
• Plug all unused tappings.
20
3" NPT
1/2" P & T Gauge
3/4"
Aquastat
Tappings
6"
3.5"
2.5"
65 mm German Bolt—on Flange
Fig. 37
3" Commercial Supply Manifold
3/4" Low
Water Cutoff
Tapping
3/4"
Relief Valve
9"
6.5"
5"