Heat Transfer Phoenix Evolution, Руководство по установке и эксплуатации

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PART 5: HYDRONIC PIPING
(CONTINUED)
HYDRONIC PIPING
18
0
20000
40000
60000
80000
100000
120000
140000
0 2 4 6 8 10 12 14 16
E
volution
BTU Input
Heating System Flow (GPM)
Evolution Sizing Chart (199K BTU Burner Input)
25
ȴ
T 20
ȴ
T
15
ȴ
T
10
ȴ
T
Max Limit
30
ȴ
T
35
ȴ
T
40
ȴ
T
Example:
120,000BTU Requires 12 GPM
Fig.5-2
E. HYDRONIC HEATING MODULE OUTPUT
The Phoenix Evolution Hydronic Heating Module output is based on the burner input and the flow
rate supplied by the selected system circulator through the closed loop side of the Brazed Plate
Exchanger. Included in this section are graphs that will help you size the appropriate circulator and
output needed to meet your system design requirements. Below is an example on the steps need-
ed to determine the correct circulator for the system.
Example: System Design requires 120,000 BTU at 20 Delta
Step 1
Using the graphs, select the input rate of the Phoenix Evolution – In this example we would have to
select a minimum input of 199K Phoenix Evolution (the 130K max. output is 100, 000 BTU which falls
below our operating point).
Step 2
Next go to the chart for the 199K burner input and select the point of operation where the BTU and
Delta T line intersect. Mark the point on the chart and go to bottom of chart to determine flow rate
needed to achieve the rated output from the Module. This example is 12 GPM.
Step 3
Select the correct circulator that will meet the flow and resistance requirements for the system
design. To calculate this, you must determine the flow and resistance through the system and heat-
ing module. The Heating Module requires 12 GPM at 10 feet of Head / The System requires 12 GPM
at 5 feet of head. To select a circulator, we would add the resistance 10 Feet of head (Module) + 5
Feet of Head (System) at 12GPM –so we would select a circulator that would operate at a resistance
15 feet at 12 GPM. (See examples in Figures 5-2 and 5-4.)