Camus Hydronics DMC 753, Инструкция по установке, эксплуатации и обслуживанию

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50
12.10 TEMPERATURE RISE AT FULL FIRING
RATE
1) The pump must run continuously when the burner is
firing.
2) With the pump running and the burner in the water
heater or hot water supply boiler in the off cycle, the
Return/Inlet temperature and Supply/Outlet temperature
readings on the DynaMax Control Panel should read
approximately the same temperatures.
3) Turn the hot water heater on and allow time for the
temperature to stabilize. Check the temperature rise
when the burner is firing at 100% of rated input.
4) Compare the temperature rise on the Control Panel with
the required temperature rise at the required flow rate
on Tables 39 and 40.
5) Should adjustment be needed, proceed as follows:
6) The DynaMax uses stainless steel heat exchanger
tubes which are not sensitive to higher water velocity. If
temperature rise is lower than anticipated it is not
necessary to reduce flow.
If the temperature rise is too high, the water velocity is
too low. Adjust as follows:
1) Check for flow restrictions. Check for debris in strainers
2) Check diameter and equivalent length of the piping
between the storage tank and hot water heater.
3) Be sure all valves are open between the hot water
heater and the storage tank. Ensure that all ball valves
are fully ported.
4) Check the pump to be sure it is running properly and
that the pump motor is running in the proper direction.
5) Be sure the pipes between the hot water heater and
storage tank are not more than a total of 50 equivalent
feet between supply and return lines. If maximum
equivalent length for the specified pipe diameter is
exceeded, larger diameter pipe may have to be installed
to achieve correct flow and temperature rise.
6) Common manifold piping for multiple unit installations
will require larger minimum pipe sizes and tank
circulating tapping to ensure proper flow.
The required temperature rise and the recommended pump
size are based on the heating of potable water with a
hardness of 7.5 to 17.0 grains per gallon and a total
dissolved solids not exceeding 300 PPM. Consult the factory
when heating potable water exceeding these specifications.
Water with a hardness of less than 5 grains per gallon will
usually have a low pH which can be aggressive and
corrosive causing non-warrantable damage to the heater,
pump and associated piping. Refer to Tables 39 and 40 for
reference.
Table 39: Temperature Rise Across Heat Exchanger
(Hydronic Heating)
TEMPERATURE RISE ACROSS HEAT
EXCHANGER
30
o
F (16.7
o
C)
35
o
F (19.4
o
F) MODEL
[BTU/hr]
USGPM
∆
P-Ft. USGPM
∆
P-Ft.
80,000 5.0 8.2 4.3 6.2
100,000 6.3 12.3 5.4 9.4
150,000
9.5 10.4 8.1 7.8
200,000 12.6 7.2 10.8 5.8
250,000 15.8 11.5 13.5 8.7
299,000 18.9 9.3 16.2 7.0
399,000
25.2 8.4 21.6 6.3
500,000 31.5 9.2 27.0 6.9
600,000
35.9 14.7 32.0 11.8
750,000
44.9 22.1 40.0 14.4
Table 40: Temperature Rise Across Heat Exchanger (DHW)
TEMPERATURE RISE ACROSS HEAT
EXCHANGER
20
O
F (11.1
o
C)
MODEL
[BTU/hr]
USGPM ∆ P-Ft.
80,000 7.5 11.5
100,000
9.4 26.9
150,000 14.0 27.8
200,000
19.2 25.9
250,000 23.5 28.3
299,000 28.8 25.8
399,000
38.4 23.9
500,000 48.6 29.4
600,000 57.6 34.2
750,000
70.4 40.0
CAUTION
Temperature rise cannot be adjusted when the burner is
firing at less than 100% of input rate.
CAUTION
Adequate care MUST be taken to prevent potential scald
injury when storing water at 140°F (60°C) and hotte r.
WARNING
Should overheating occur or the gas supply fail to shut off,
do not turn off or disconnect the electrical supply to the
pump, instead, shut off the gas supply at a location external
to the appliance