Burnham 8HE Series Application Instructions page 33

3
Water Piping
(continued)
Table 3-6: Boiler Water Data
Water
Boiler Size
Volume (Gal)
805HE 11.9
806HE 13.9
1. In a primary-secondary pumping installation temperature rise thru the boiler has no relation to system ∆T. In a
parallel pumping installation temperature rise thru the boiler equals the temperature drop of the system.
2. In a primary-secondary pumping installation pressure drop thru the boiler does not add to system circulator head.
In a parallel pumping installation pressure drop thru the boiler does add to system circulator head load.
3. 40°F Temperature rise thru boiler recommended for Primary-Secondary pumping.
111924-01 - 2/23
Heating Flow Rate
Surface (Ft ) (GPM)
2
20
34.4 13
10
25
42.6 17
13
8HE Multiple Boiler Application Instructions
Temp. Rise
Min. Boiler
thru Boiler
Piping (NPT)
(°F)
20°F 1-1/2 in.
30°F 1-1/4 in.
40°F 1-1/4 in.
20°F 1-1/2 in.
30°F 1-1/2 in.
40°F 1-1/4 in.
Boiler
Pressure
Drop (ft.)
3 ft.
2 ft.
1 ft.
3 ft.
2 ft.
1 ft.
33