Biasi B-3 Manual And Installation Instructions page 11

4. Installation of Boiler Trim Components Cont.
1. Install high limit control in upper left or right rear tapping using 3/4" immersion
well. All tapings and joints should be sealed with piping compound. The L4006A
can be adjusted up to 220
the installer. The differential is also adjustable between 5 and 30 degrees. It
should be set as close to 30 degrees as possible to prevent short cycling of the
boiler. If you are installing a 7248, Hydrostat, or Aquasmart screw the unit to
side panel of the boiler as close to the immersion well as possible using the tabs
on the aquastat. Run the sensor from behind the aquastat to the immersion well
and fix it according to manufacturer's instructions.
2. Install Pressure Relief Valve in opposite, upper rear tapping using 3" nipple and
3/4" elbow
3. Install 3/4" boiler drain in lower left or right rear tapping, or lower front tapping.
4. Install makeup water line in opposite lower rear tapping, and the other plug in
lower front tapping of the boiler.
5. Install combination pressure/temperature gauge and 1/2" x 1/4" bushing in upper
front tapping. The gauge must be tightened using a wrench and not your
hand.
6. Install burner mounting hardware in the four tapings on the front of the boiler
door.
Boiler Tapping Diagram:
Ø 1 2 Pressure/Temperature Guage Tapping
Ø3 1 2 Burner Blast Tube Orifice
Ø 3 4 Alternative Boiler Drain Tapping
o
F, and should be set to the desired temperature by
Ø1 1 2 Supply Tapping
Ø 3 4 Hi Limit Control or PRV Tapping
Ø6 Exhaust Breeching
27
Ø 3 4 Alternative Boiler Drain Tapping
11 1 2
4 1 2 Ø1 1 2 Return Tapping
Ø 3 4 Boiler Drain Tapping
2X 4 1 2
Ø 3 4 PRV or Hi Limit Control Tapping
3X 27
22
3 3 4
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