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
Summary of Contents for HERALD HCB116CE
Page 8: ...8 3 1 2 PRINCIPLE PARTS TO BE USED IN CONJUNCTION WITH TABLE 3 1 1...
Page 31: ...31 Max distance between brackets...
Page 32: ...32...
Page 33: ...33...
Page 37: ...37...
Page 53: ...53 15 8 WIRING DIAGRAM 15 8 1 WIRING DIAGRAM...
Page 54: ...54 15 9 LADDER DIAGRAM 15 9 1 LADDER DIAGRAM...
Page 92: ...92...
