H. high velocity circulator pump – HTP EL-399NVWH User Manual
Page 19
19
LP- 346 REV. 3.20.14
H. HIGH VELOCITY CIRCULATOR PUMP
The heat exchanger has a minimum total water volume that must be taken into account when sizing the circulator. These minimum
water volumes are listed in Table 5 below.
MINIMUM HEATER FLOW RATES
MODEL
MINIMUM FLOW (GPM)
EL-80 VWH
5.3
EL-110 VWH
7.3
EL-150 VWH
10
EL-220 VWH
14.6
El-299/301 VWH
20
El-399 VWH
26
Table 5
– Minimum Heat Exchanger Water Volumes
Every VWH system requires special attention to pump size in order to overcome pressure drop through the heater and its related
piping. All circulators installed on the VWH system must be designed for a potable water system.
ELITE VWH CIRCULATORS
MODEL
CIRCULATOR
PART #
FLANGE SIZE
FLANGE PART #
EL-80 VWH
009-SF5
7450P-239
1” NPT
7450P-242
EL-110 VWH
0011-SF4
7450P-240
1” NPT
7450P-242
EL-150 VWH
0013-SF3
7450P-241
1” NPT
7450P-242
EL-220 VWH
0013-SF3
7450P-241
1” NPT
7450P-242
EL-299/301 VWH
2400-20S
7250P-605
1 ¼” NPT
7250P-603
EL-399 VWH
2400-50S
7250P-606
1 ½” NPT
7250P-604
Table 6
ELITE PUMP KITS
Elite 80 VWH
– Part # 7450P-246
Elite 110 VWH
– Part # 7450P-247
Elite 150 and Elite 220 VWH
– Part # 7450P-248
Elite 299/301 VWH
– Part # 7450P-249
Elite 399 VWH
– Part # 7450P-250
The chart below represents the various system design temperature rise through the heater along with their respective flows and friction
loss, which will aid in circulator selection.
HEAT EXCHANGER PRESSURE DROP CHART
Model
Flow Rate Δ P’
Flow
Rate
6
GPM
7 GPM
8
GPM
9
GPM
10
GPM
11 GPM
12
GPM
13
GPM
14
GPM
15
GPM
16
GPM
17
GPM
18
GPM
19
GPM
20
GPM
21
GPM
22
GPM
EL-80
10’
14’
17’
21’
26’
*
*
*
*
*
*
*
*
*
*
*
*
EL-110
*
*
15’
17’
22’
25’
33’
*
*
*
*
*
*
*
*
*
*
EL-150
*
*
*
*
12’
15’
17’
19’
22’
27’
*
*
*
*
*
*
*
EL-220
*
*
*
*
*
*
*
*
*
8’
10’
11.5’
13’
15’
16.5’
17’
19’
EL-299
EL-301
*
*
*
*
*
*
*
*
*
*
*
*
*
*
13’
14’
15’
EL-399
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
Flow
Rate
23
GPM
24
GPM
25
GPM
26
GPM
27
GPM
28
GPM
29
GPM
30
GPM
31
GPM
32
GPM
33
GPM
34
GPM
35
GPM
36
GPM
37
GPM
38
GPM
39
GPM
EL-80
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
EL-110
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
EL-150
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
EL-220
21’
23’
24’
*
*
*
*
*
*
*
*
*
*
*
*
*
*
EL-299
EL-301
16.5’
18’
20’
22’
24’
26’
29’
33’
36’
*
*
*
*
*
*
*
*
EL-399
*
*
*
12.9’
13.6’
14’
15.7’
17’
18’
19.4’
21’
22.5’
26’
28’
31’
34’
39’
Table 7 -
*Do not operate heater at these flow settings as it will damage the heat exchanger or related components cause by excessive flow
rates or minimum flow rates.