Lochinvar HERALD HCB116CE, Руководство по установке

Страница: 47 / 92

47
14.1.2 EXPANSION VESSEL SIZING
The following information is based on a static head of 35mtrs and a cold fill pressure of 3.5bar. If the system has different
parameters, a more detailed calculation will need to be made.
V V = S V * e
0.45
Where:
V V = Vessel Volume
S V = System Volume
e = Coefficient of Expansion (See 14.1.3)
Flow Temp.
 C
30 35 40 45 50 55 60
e 0.005 0.006 0.008 0.010 0.012 0.015 0.017
Flow Temp.

C
65 70 75 80 82 85 90
e 0.020 0.023 0.026 0.030 0.031 0.033 0.037
14.1.3 COEFFICIENT OF EXPANSION OF WATER AT 3.8 BAR COLD FILL PRESSURE
14.2 CIRCULATING PUMPS
A suitable primary pump, sized in accordance with 14.2.1 should be fitted to the inlet to the boiler.
Primary pumps are available from Lochinvar Limited as ancillary items.
ΔT (°C):
13.89 16.67 19.44 22.22 25.00
Model l/sec Metre-H
2
0 l/sec Metre-H
2
0 l/sec Metre-H
2
0 l/sec Metre-H
2
0 l/sec Metre-H
2
0
HCB46CE
0.69 3.90 0.58 3.35 0.50 2.90 0.44 2.59 0.38 2.16
HCB61CE
0.98 5.79 0.81 3.96 0.69 2.77 0.61 2.44 0.54 2.16
HCB86CE
1.32 3.51 1.10 2.77 0.95 2.23 0.83 1.86 0.74 1.52
*Boiler primary system piping based on 6 meters of piping, 4 - 90° elbows, and 2 - fully ported ball valves.
14.2.1 SYSTEM TEMPERATURE RISE CHART (*I
NCLUDES
P
RIMARY
P
IPING
)
Model Primary shunt pump
HCB46CE LM900139A
HCB61CE LM900139A
HCB86CE LM900139A
14.2.2 PRIMARY SHUNT PUMP FOR USE WITH HERALD BOILER RANGE