Section 5. water flow requirements, 1 magnatherm boiler flow and head requirements – LAARS MagnaTherm MGV - Installation, Operation and Maintenance Instructions User Manual
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LAARS Heating Systems
Page 18
Section 5
WATER FLOW REQUIREMENTS
5.1
MagnaTherm Boiler Flow and Head Requirements
5.2
MagnaTherm Water Heater Flow and Head Requirements
Dimensional Data
Sizing Data
Water Pipe Gas Pipe
Boiler Thermal
Efficiency
Water Heater Thermal
Efficiency
Water
Content
Vent
Diameter
Vent
Length
Inches
cm
Inches
cm
Inches
cm
Inches
cm
(NPT)
(NPT)
MBH
kW
MBH
kW
%
%
lbs
kg
lbs
kg
lbs
kg
Gallons
in (cm)
ft (m)
2000
29.3
75
77
196
38.0
97
57.0
145
2.5
1.5
2000
1999
586
1883
552
95.0
96
1390
630
1562
709
1590
721
22
8 (20)
100 (30.5)
2500
29.3
75
77
196
38.0
97
57.0
145
2.5
1.5
2500
2499
732
2374
696
95.0
96
1785
810
2039
925
1985
900
31
8 (20)
100 (30.5)
3000
30.8
78
87
221
41.5
105
60.5
154
3
2
3000
3000
879
2814
825
95.0
95
1785
810
2039
925
1985
900
31
10 (25) 100 (30.5)
3500
30.8
78
87
221
41.5
105
60.5
154
3
2
3500
3500
1025
3317
972
95.0
96
2278
1033
2742
1244
2478
1124
56
10 (25) 100 (30.5)
4000
34.5
88
97
246
52.0
132
70.0
178
4
2.5
4000
4000
1172
3724
1091
95.0
96
2278
1033
2742
1244
2478
1124
56
12 (30) 100 (30.5)
Water Heater
Thermal Efficiency
MBH
kW
%
2000
1999
586
96
2500
2499
732
96
3000
3000
879
95
Boiler Water Flow Requirements
3500
3500
1025
96
4000
4000
1172
96
Size
Flow
Head Loss
Flow
Head Loss
Flow
Head Loss
Flow
Head Loss
Flow
Head Loss
Flow
Head Loss
Flow
Head Loss
Flow
Head Loss
GPM
Feet
GPM
Feet
GPM
Feet
GPM
Feet
LPM
m
LPM
m
LPM
m
LPM
m
2000
150
30
128
23.5
109
17.1
95
13.6
2000
568
9.2
485
7.2
413
5.2
360
4.2
2500
190
34
158
23.6
136
17.6
119
13.6
2500
719
10.0
599
7.0
514
5.0
449
4.1
3000
226
47
190
34.2
164
25.8
142
18.9
3000
856
14.3
719
10.4
621
7.9
538
5.8
3500
266
41
222
30.6
190
23.6
166
18.6
3500
1007
12.0
839
9.0
719
7.0
629
6.0
4000
300
48
255
38.2
218
28.5
190
22.5
4000
1136
14.6
965
11.6
825
8.7
719
6.9
Volume Water Heater Flow Requirements
Temp Rise
Flow
Head Loss
Grains
°F (°C)
GPM (LPM)
Feet (m)
per Gallon
2000
20 (12)
177 (670)
43.9 (13.4)
10
2500
25 (14)
220 (833)
46 (14)
10
3000
25 (14)
220 (833)
46 (14)
10
3500
30 (17)
266 (1006) 41.2 (12.6)
10
4000
30 (17)
266 (1006) 41.2 (12.6)
10
MagnaTherm Electrical Options
Current (Nominal)
2000
2500
3000
3500
4000
2000
2500
3000
3500
4000
22.6
N/A
N/A
N/A
N/A
15.1
N/A
N/A
N/A
N/A
11.3
N/A
N/A
N/A
N/A
8.8
N/A
N/A
N/A
N/A
12.7
19.4
19.4
19.4
19.4
7
12.5
12.5
13
13
6.2
8.7
8.7
8.7
8.7
3.2
5
5
4.8
4.8
4.5
5.9
5.9
5.9
5.9
2.8
4
4
4.4
4.4
Size
Size
Size
Size
A
B
C
D
Temperature Rise in °C
30°F
Temperature Rise in °F
25°F
35°F
Output Rate
Shipping Weight
Output Rate
Product Weight
Operating Weight
Input Rate
208V Three Phase
480V Three Phase
600V Three Phase
Voltage
Current (FLA)
120V Single Phase
240V Single Phase
40°F
14°C
17°C
19°C
22°C
Headloss is for boiler only (no piping)
*
*
*
Dimensional Data
Sizing Data
Water Pipe Gas Pipe
Boiler Thermal
Efficiency
Water Heater Thermal
Efficiency
Water
Content
Vent
Diameter
Vent
Length
Inches
cm
Inches
cm
Inches
cm
Inches
cm
(NPT)
(NPT)
MBH
kW
MBH
kW
%
%
lbs
kg
lbs
kg
lbs
kg
Gallons
in (cm)
ft (m)
2000
29.3
75
77
196
38.0
97
57.0
145
2.5
1.5
2000
1999
586
1883
552
95.0
96
1390
630
1562
709
1590
721
22
8 (20)
100 (30.5)
2500
29.3
75
77
196
38.0
97
57.0
145
2.5
1.5
2500
2499
732
2374
696
95.0
96
1785
810
2039
925
1985
900
31
8 (20)
100 (30.5)
3000
30.8
78
87
221
41.5
105
60.5
154
3
2
3000
3000
879
2814
825
95.0
95
1785
810
2039
925
1985
900
31
10 (25) 100 (30.5)
3500
30.8
78
87
221
41.5
105
60.5
154
3
2
3500
3500
1025
3317
972
95.0
96
2278
1033
2742
1244
2478
1124
56
10 (25) 100 (30.5)
4000
34.5
88
97
246
52.0
132
70.0
178
4
2.5
4000
4000
1172
3724
1091
95.0
96
2278
1033
2742
1244
2478
1124
56
12 (30) 100 (30.5)
Water Heater
Thermal Efficiency
MBH
kW
%
2000
1999
586
96
2500
2499
732
96
3000
3000
879
95
Boiler Water Flow Requirements
3500
3500
1025
96
4000
4000
1172
96
Size
Flow
Head Loss
Flow
Head Loss
Flow
Head Loss
Flow
Head Loss
Flow
Head Loss
Flow
Head Loss
Flow
Head Loss
Flow
Head Loss
GPM
Feet
GPM
Feet
GPM
Feet
GPM
Feet
LPM
m
LPM
m
LPM
m
LPM
m
2000
150
30
128
23.5
109
17.1
95
13.6
2000
568
9.2
485
7.2
413
5.2
360
4.2
2500
190
34
158
23.6
136
17.6
119
13.6
2500
719
10.0
599
7.0
514
5.0
449
4.1
3000
226
47
190
34.2
164
25.8
142
18.9
3000
856
14.3
719
10.4
621
7.9
538
5.8
3500
266
41
222
30.6
190
23.6
166
18.6
3500
1007
12.0
839
9.0
719
7.0
629
6.0
4000
300
48
255
38.2
218
28.5
190
22.5
4000
1136
14.6
965
11.6
825
8.7
719
6.9
Volume Water Heater Flow Requirements
Temp Rise
Flow
Head Loss
Grains
°F (°C)
GPM (LPM)
Feet (m)
per Gallon
2000
20 (12)
177 (670)
43.9 (13.4)
10
2500
25 (14)
220 (833)
46 (14)
10
3000
25 (14)
220 (833)
46 (14)
10
3500
30 (17)
266 (1006) 41.2 (12.6)
10
4000
30 (17)
266 (1006) 41.2 (12.6)
10
MagnaTherm Electrical Options
Current (Nominal)
2000
2500
3000
3500
4000
2000
2500
3000
3500
4000
22.6
N/A
N/A
N/A
N/A
15.1
N/A
N/A
N/A
N/A
11.3
N/A
N/A
N/A
N/A
8.8
N/A
N/A
N/A
N/A
12.7
19.4
19.4
19.4
19.4
7
12.5
12.5
13
13
6.2
8.7
8.7
8.7
8.7
3.2
5
5
4.8
4.8
4.5
5.9
5.9
5.9
5.9
2.8
4
4
4.4
4.4
Size
Size
Size
Size
A
B
C
D
Temperature Rise in °C
30°F
Temperature Rise in °F
25°F
35°F
Output Rate
Shipping Weight
Output Rate
Product Weight
Operating Weight
Input Rate
208V Three Phase
480V Three Phase
600V Three Phase
Voltage
Current (FLA)
120V Single Phase
240V Single Phase
40°F
14°C
17°C
19°C
22°C
*
*
*
*
*
Water Flow Requirements (for water heater submittal)
Model
Flow Rate Temp Rise
Headloss
Flow Rate Temp Rise Headloss
Flow Rate
Temp Rise
Headloss
Flow Rate Temp Rise
Headloss
GPM
°F
Ft
LPM
°C
m
GPM
°F
Ft
LPM
°C
m
2000
152
25
33.0
575
14
10.1
177
21
43.9
670
12
13.4
2500
190
25
33.7
719
13.9
10.0
220
21
46.0
833
11.7
14
3000
190
30
36.0
719
17
11.0
220
26
46.0
833
14
14
3500
222
30
30.6
839
17
9.0
266
25
40.6
1007
14
12
4000
224
34
30.0
848
19
9.1
266
29
41.2
1007
16
12.6
Allowable pH: 6.5 to 9.5
Headloss is for the heater only (no piping)
Water Hardness
1-10 grains per gallon
Water Hardness
11-15 grains per gallon
Water Flow Requirements (for water heater submittal)
Model
Flow Rate Temp Rise
Headloss
Flow Rate Temp Rise Headloss
Flow Rate
Temp Rise
Headloss
Flow Rate Temp Rise
Headloss
GPM
°F
Ft
LPM
°C
m
GPM
°F
Ft
LPM
°C
m
2000
152
25
33.0
575
14
10.1
177
21
43.9
670
12
13.4
2500
190
25
33.7
719
13.9
10.0
220
21
46.0
833
11.7
14
3000
190
30
36.0
719
17
11.0
220
26
46.0
833
14
14
3500
222
30
30.6
839
17
9.0
266
25
40.6
1007
14
12
4000
224
34
30.0
848
19
9.1
266
29
41.2
1007
16
12.6
Allowable pH: 6.5 to 9.5
Headloss is for the heater only (no piping)
Water Hardness
1-10 grains per gallon
Water Hardness
11-15 grains per gallon
Water Flow Requirements (for water heater submittal)
Model
Flow Rate Temp Rise
Headloss
Flow Rate Temp Rise Headloss
Flow Rate
Temp Rise
Headloss
Flow Rate Temp Rise
Headloss
GPM
°F
Ft
LPM
°C
m
GPM
°F
Ft
LPM
°C
m
2000
152
25
33.0
575
14
10.1
177
21
43.9
670
12
13.4
2500
190
25
33.7
719
13.9
10.0
220
21
46.0
833
11.7
14
3000
190
30
36.0
719
17
11.0
220
26
46.0
833
14
14
3500
222
30
30.6
839
17
9.0
266
25
40.6
1007
14
12
4000
224
34
30.0
848
19
9.1
266
29
41.2
1007
16
12.6
Allowable pH: 6.5 to 9.5
Headloss is for the heater only (no piping)
Water Hardness
1-10 grains per gallon
Water Hardness
11-15 grains per gallon
*
*
*
*
Table 10. Boiler Flow and Head Requirements
Table 11. Water Heater Flow and Head Requirements