VOLTMAX ELECTRIC BOILER Installation and Operation Manual
(
Revised March 2019)
, Page
12.
For example, an 180kW electric boiler has a power
of 614,160 BTU/h. The system is designed for a
drop-in temperature (Delta T) of 20°F.
Flow required = 614,160
20
500 = 61.4 GPM
N.B.
To achieve proper operation, a minimum flow
must be present when a heating request is applied
and the heating elements are in operation. In the
table below, the column representing a differential
of 50°F indicates the minimum recommended flow
for each boiler output.
Installation of a flow switch
is not mandatory. If installed, its contact must be
connected between 24V+ and W1 (operation
authorization)
The following table lists the required pump flow
rate in relation to the boiler capacity and Delta T.
Table 9 : Temperature rise vs flow rate
(GPM)
MODEL
DELTA T
0
10
o
F
20
o
F
30
o
F
40
o
F
VoltMax 77
52,5
26,3
17,5
13,1
VoltMax 80
54,6
27,3
18,2
13,6
VoltMax 84
57,3
28,7
19,1
14,3
VoltMax 88
60,1
30,0
20,0
15,0
VoltMax 96
65,5
32,8
21,8
16,4
VoltMax 105
71,7
35,8
23,9
17,9
VoltMax 120
81,9
40,9
27,3
20,5
VoltMax 126
86,0
43,0
28,7
21,5
VoltMax 144
98,3
49,1
32,8
24,6
VoltMax 192
131,0
65,5
43,7
32,8
VoltMax 204
139,2
69,6
46,4
34,8
VoltMax 216
147,4
73,7
49,1
36,8
VoltMax 225
153,5
76,8
51,2
38,4
VoltMax 240
163,8
81,9
54,6
40,9
VoltMax 255
174,0
87,0
58,0
43,5
VoltMax 270
184,2
92,1
61,4
46,1
VoltMax 288
196,5
98,3
65,5
49,1
VoltMax 306
208,8
104,4
69,6
52,2
VoltMax 315
215,0
107,5
71,7
53,7
VoltMax 324
221,1
110,5
73,7
55,3
VoltMax 336
229,3
114,6
76,4
57,3
VoltMax 357
243,6
121,8
81,2
60,9
VoltMax 378
257,9
129,0
86,0
64,5
VoltMax 384
262,0
131,0
87,3
65,5
VoltMax 408
278,4
139,2
92,8
69,6
*Minimum flow
DRAIN FAUCET
A drain valve is installed behind the unit. It allows
the boiler to be emptied, to make possible the
replacement of defective components.
SIEVE
A sieve or other accessorie that collects sediments
should be installed on systems where high particle
concentration may existe. Sediments may
eventually get to the elements and cause damage
to the elements. The warranty does not cover
damages in this case.
