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Hot water pip ing must be supported by suitable hangers or
floor stands, NOT by the boiler. Copper pipe systems will be
subject to considerable expansion and con trac tion. Rigid
pipe hangers could allow the pipe to slide in the hanger
resulting in noise transmitted into the system. Padding is
recommended on rigid hangers installed with a copper
system. The boiler pressure relief valve must be piped to a
suitable floor drain. See the relief valve section on page 23 of
this manual.
ƽ CAUTION
A leak in a boiler system will cause the
system to intake fresh water constantly,
which will cause the tubes to accumulate
a lime/scale build up. This will cause a
NON-WARRANTABLE FAILURE.
Water Connections
Heating Boilers with inputs of 45,000 - 260,000 Btu/hr have
1 1/2" NPT inlet and outlet connections.
ƽ CAUTION
Field installed reducing bushings may
de crease flow re sult ing in boiler noise or
flashing to steam.
Circulator Pump Requirements
This is a low mass, high efficiency hot water boil er which must
have adequate flow for quiet, efficient op er a tion. The boiler
circulating pump must be field supplied. The boiler circulator
pump must operate con tin u ous ly while the boiler is firing.
Pump selection is critical to achieve proper op er a tion. A
pump should be selected to achieve proper system design
water temperature rise. A heat ex chang er pressure drop chart
(Table 4C) is provided to assist in proper pump selection.
Also provided is a System Temperature Rise Chart (Table 4B
on page 25). This table provides GPM and boiler head-loss at
various temperature rises for each boiler based on Btu/hr
input. Temperature rise is the difference in boiler inlet
temperature and boiler outlet temperature while the boiler is
firing. Example: The boiler inlet tem per a ture is 160°F and the
boiler outlet temperature is 180°F, this means that there is a
20°F tem per a ture rise across the boiler.
TABLE - 4C
HEAT EXCHANGER PRESSURE DROP CHART
CB 315
CB 360
CB 399
CB 500
FT/HD
Gallons per Minute
0
5
10
15 20 25
30
35
7
6
5
4
3
2
1
0
4 Water connections
26
Installation & Service Manual