QHT BIASI B10 Series B3-B9 Manual And Installation page 11

B10 series
Table of Contents

Advertisement

4. Installation of Boiler Trim Components Cont.
1. Install L4006A aquastat 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 7248U, 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
Honeywell's instructions. The 7248 can be adjusted between 140
with a fixed differential of 30 degrees.
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 3/4" plug in opposite lower rear tapping, and/or 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.
7. Install boiler door bolts on opposite side of door hinge.
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
o
F and 220
Ø 3 4 Boiler Drain Tapping
2X 4 1 2
o
F
Ø 3 4 PRV or Hi Limit Control Tapping
3X 27
22
3 3 4
Page 11

Hide quick links:

Advertisement

Table of Contents
loading

Table of Contents