MACH
®
Gas Fired Boiler
26
Some leak test solutions, including soap and water, may cause corrosion. These solutions should be rinsed-off with
water after testing.
3.7
B
OILER
W
ATER
P
IPING
3.7.1 Piping Design
Water Flow in System/Pumping Requirements
See the charts below for proper water flow requirements. Incorrect flow may result in eventual damage or premature
failure of the equipment that may not be covered by warranty.
Proper flow rates may be achieved through a combination of primary and secondary flow loops. Multiple zones and
pumps may result in different flow rates at different times. Consideration must be given to all possible conditions and
their consequences.
Maximum Fire Rate
For minimum flow rates at other than maximum
firing rate, see MACH
®
Boiler Variable
Pumping Graph (below)
MACH Variable Pumping
0
10
20
30
40
50
60
20
40
60
80
100
Firing Rate (%)
F
lo
w
R
a
te
(G
P
M
)
C1050
C750
C900
Model
Max Flow
GPM
Min Flow
GPM
Pressure Drop (ft.)
at max flow
20°F ΔT
40°F ΔT
1050
105
52
12
900
90
45
12
750
75
37
12
