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Bobcat Models B-120A and B-200A
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Table 2a. Recommended pump models for domestic hot water tank piping to the Bobcat model B-120 boiler.
Table 2b. Recommended pump models for domestic hot water tank piping to the Bobcat model
B-200 boiler.
Flow
Rate
(gpm)
Temp
Rise
(˚F)
Boiler
Head
Loss
(Feet w.c.)
Domestic Water
Tank Piping
Head Loss **
(Feet w.c.)
Available Head Capability Left for Various Model
Circulators to Overcome DHW Tank Head Loss
(Feet w.c.) ***
Taco 0012 Taco 0014 Taco 0011
10.8 20˚ 10.0' 3.0'
Not Recommended
4.0' 9.5'
7.2 30˚ 5.0' 2.5' 5.0' 10.5' 17.5'
5.4* 40˚ 3.0' 1.5' 8.5' 14.5' 23.5'
Flow
Rate
(gpm)
Temp
Rise
(˚F)
Boiler
Head
Loss
(Feet w.c.)
Domestic
Water
Tank Piping
Head Loss **
(Feet w.c.)
Available Head Capability Left for Various Model
Circulators to Overcome DHW Tank Head Loss (Feet w.c.) ***
Taco 0011 Taco 0013
(2 in Series)
Taco 0011
s
(2 in Series)
Taco 0013
s
T
aco
1400-20
s
T
aco
1400-45
s
18.0 20˚ 23.0' 4.0'
Not
Recommended
Not
Recommended
3.0' 13.0'
Not
Recommended
6.5'
14.5 25˚ 16.5' 3.5'
Not
Recommended
3.5' 17.0' 27.0' 6.0' 15.5'
12.0 30˚ 12.5' 3.0' 5.5' 10.5' 26.5' 36.5' 12.0' 21.5'
9.0 * 40˚ 7.5' 2.5' 14.0' 18.0' 38.0' 46.0' 19.5' 28.5'
Figure 19. Boiler water side pressure drop
0
5
10
15
20
25
0
5 10 15 20
Head
(fe e t w .c .
)
Flow R a te (GP M)
B-200
B
-120
Notes:
*
This is the minimum flow rate recommended for each of the boiler models.
** Domestic water tank piping head is based on 1” inside diameter piping and full port valves.
*** Refer to the DHW Tank Manufacturer’s water flow rate requirements and associated pressure drop head loss, to select
the appropriate circulator.
s If 2 circulators are specified, the
y m
ust be piped in ser
ies in order to pro
vide the head capacity sho
wn.
P
o
w
er to
circulator(s) m
ust be supplied through an appropr
iate rela
y to protect the boiler control’
s fuse
.