Specifications

Part number 550-100-090/0809
53
g a s -f i r e d w a t e r b o i l e r — Boiler Manual
ADVANCED INSTALLATION
Sizing direct-connected DHW piping (continued)
Pump curves for typical circulators suggested for DHW loopFigure 55
Figure 54 Pipe sizing and head losses for DHW
applications
(H1=Ultra boiler head loss;
H2=piping head loss)
Flow
rate
Temp
rise
Pipe
size
H1 H2
GPM °F Inches
Boiler head
loss
Feet w.c.
Piping head
loss
Feet w.c.
Ultra-80 (71,000 Btuh output)
7 20 1 6.6 2.7
9 16 1 11.6 4.2
10 14 1¼ 14.6 2.5
Ultra-105 (94,000 Btuh output)
7 27 1 7.0 2.7
9 21 1 11.2 4.2
10 19 1¼ 13.6 2.5
13 14 1¼ 22.2 3.9
Ultra-155 (139,000 Btuh output)
9 31 1¼ 6.2 2.1
10.0 28 1¼ 7.7 2.5
13 21 1¼ 13.3 3.9
16 17 1¼ 20.5 5.7
Ultra-230 (207,000 Btuh output)
13 32 1¼ 9.4 3.9
16 26 1¼ 13.7 5.7
21 20 1½ 22.0 2.9
Ultra-299 (279,000 Btuh output)
18 31 1½ 6.6 2.2
22 25 1½ 9.5 3.1
29 19 2 17.4 2.9
Ultra-399 (365,000 Btuh output)
22 34 1½ 9.5 3.1
29 25 2 15.5 2.9
36 20 2 22.8 4.3
A B & G PL-36
B Taco 0011
C Taco 0010
D Taco 007
K Taco 1400-30
Taco 2400-30
E Taco 0013
F Grundfos 43-75
G Taco 0014
H Grundfos 15-42
J Taco 1400-20
Taco 2400-20
L Taco 0012