Boiler &
Water Heater
MIGHTY THERM2
®
Date:
MT2H
Hydronic Heater
MT2V
Volume Water Heater
Indoor/Outdoor Sizes 500-2000
Standard
Equipment
• ASME 160 psi working pressure
heat exchanger
Submittal Data
Engineer:
Project Name:
Prepared By:
Location:
Bid Date:
Contractor:
• Flow switch
• Burner site glass
• Multiple operating gas valve/
pressure regulators
• 24V control system
• ASME “H” stamp
• Two-stage firing
• Temperature pressure gauge
• Manual reset high limit
• Flanged water connections
• Manual “A” gas valve
• Glass-lined headers
• Intake air filter
• External controller connections with
selector switch
• External header gaskets
• Multiple, removable burner trays
• Hot surface ignition
• 75 psi (517 kPa) ASME rated
pressure relief valve (MT2H)
• Stainless steel burners
• On/Off toggle switch
• Built-in draft fan for Category I
or III vent systems
• Pump time delay
• 125 psi (861 kPa) ASME rated
pressure relief valve (MT2V)
Boiler Data
Project #:
Model:
Boiler MT2H
Water Heater MT2V
• 115/24VAC transformer
• Less than 10 ppm NOx
• Air pressure switch
Number of Units:
Heat Exchanger
Copper
Cupro-Nickel
Copper, Reversed
Cupro-Nickel, Reversed
Fuel
Natural
Propane
Water Trim
Glass-Lined Cast Iron
Bronze Trim
Full Bronze
Options
CSD-1
200°F Max Controls
(std. on MT2V)
Low Water Cutoff
Auto reset high limit
Ignition failure alarm with bell and
dry contacts, red trouble and
green main gas lights
ASME "HLW" Stamp (MT2V only)
Sizing Data
Indoor
Model
Input1,3
BTU/h
Output1,3
BTU/h
Gas
Conn.
Size
inches2
Water
Conn.
Size
inches2
500
500,000
425,000
1¼
2
425
193
750
750,000
638,000
1¼
2
505
229
Shipping
Weight
lbs. kg
1000
999,000
849,000
1½
2½
615
279
1250
1,250,000
1,062,500
2
2½
675
306
1500
1,500,000
1,275,000
2
2½
760
345
1750
1,750,000
1,487,500
2
2½
825
375
2000
1,999,000
1,699,000
2
2½
955
434
NOTES: 1. Input and output must be derated 4% per 1000 feet above sea level when installed above 2000 feet altitude.
2. Dimensions are nominal.
3. For other boiler ratings:
Boiler Horsepower: HP = Output
Radiation Surface: EDR sq. ft. = Output
33,475
150
Accessories
Vent terminal for outdoor unit
Side-wall vent terminal for
indoor unit with horizontal
venting
Air terminal for outdoor unit
Side-wall combustion air
terminal for indoor unit with
horizontal ducted air
Water Flow
Data
MT2H (Boiler)
TEMPERATURE RISE IN DEGREES
20°F
11°C
25°F
Size
Flow
gpm
H/L
feet
Flow
lpm
H/L
m
500
43
1.7
161
0.5
34
750
64
3.3
242
1.0
1000
85
5.0
321
1.5
1250 106
8.1
402
1500 128
10.0
483
1750 N/R
N/R
2000 N/R
N/R
14°C
Flow H/L
gpm feet
30°F
17°C
35°F
19°C
Flow
lpm
H/L
m
Flow
gpm
H/L
feet
Flow
lpm
H/L
m
Flow
gpm
H/L
feet
Flow
lpm
H/L
m
1.1
129
0.3
28
0.9
107
0.3
24
0.7
92
0.2
51
2.3
193
0.7
43
1.7
161
0.5
36
1.2
138
0.4
68
3.6
257
1.1
57
3.1
214
0.9
49
2.2
184
0.7
2.5
85
6.1
322
1.9
71
4.7
268
1.4
61
3.4
230
1.0
3.0
102
7.2
386
2.2
85
5.5
322
1.7
73
4.2
276
1.3
N/R N/R
119 10.5
451
3.2
99
8.4
375
2.6
85
5.8
322
1.8
N/R N/R
136 12.5
515
3.8
113
10.4
429
3.2
97
8.3
368
2.5
MT2V (Water Heater)
HARD WATER
NORMAL WATER
Temp
H/L rise Flow
feet °F lpm
Temp
H/L rise
m
°C
Flow
gpm
SOFT WATER
Temp
H/L rise Flow
feet
°F
lpm
Temp
H/L rise
m
°C
H/L
feet
Temp
H/L rise
m °C
Size
500
90
3.5
9
341
1.1
5
68
2.3
13
257
0.7
7
45
1.8
19
170
0.5 10
750
90
6.0
14
341
1.8
8
68
3.0
19
257
0.9 10
45
2.1
28
170
0.6 16
1000
90
6.1
19
341
1.9
10
68
3.6
25
257
1.1 14
45
2.3
38
170
0.7 21
1250
90
6.3
24
341
1.9
13
68
3.8
31
257
1.2 17
68
3.8
31
257
1.2 17
1500
90
6.5
28
341
2.0
16
68
3.9
38
257
1.2 21
68
3.9
38
257
1.2 21
1750
90
6.7
33
341
2.0
18
68
4.0
44
257
1.2 24
68
4.0
44
257
1.2 24
2000
112
10.0
30
424
3.0
17
112
10.0
30
424
3.0 17
112
10.0
30
424
3.0 17
NOTE: Headloss (H/L) shown is for the Mighty Therm2 heat exchanger only.
Flow
gpm
Temp
rise Flow
°F lpm
Flow
gpm
WATER TEMPERATURE RISE IN DEGREES
Recovery
Data
Size
40°F
gph
50°F
gph
60°F
gph
70°F
gph
80°F
gph
90°F
gph
100°F
gph
120°F
gph
140°F
gph
500
1276
1020
850
729
638
567
510
425
364
750
1915
1532
1277
1094
957
851
766
638
547
1000
2548
2038
1699
1456
1274
1132
1019
849
728
1250
3189
2551
2126
1822
1594
1417
1276
1063
911
1500
3827
3061
2551
2187
1913
1701
1531
1276
1093
1750
4464
3571
2976
2551
2232
1984
1786
1488
1276
2000
5099
4079
3399
2914
2550
2266
2040
1700
1457
Size
22°C
L/h
28°C
L/h
33°C
L/h
39°C
L/h
44°C
L/h
50°C
L/h
56°C
L/h
67°C
L/h
78°C
L/h
500
4821
3857
3214
2755
2411
2143
1929
1607
1378
750
7238
5790
4825
4136
3619
3217
2895
2413
2068
1000
9632
7705
6421
5504
4816
4281
3853
3211
2752
1250
12054
9643
8036
6888
6027
5357
4821
4018
3444
1500
14464
11571
9643
8265
7232
6429
5786
4821
4133
1750
16875
13500
11250
9643
8438
7500
6750
5625
4821
2000
19274
15419
12850
11014
9637
8566
7710
6425
5507
NOTE: gph = gallons per hour, L/h = Liters per hour.
Clearances
Appliance
Surface
Suggested Service
Access Clearances
Left Side
1
2.5
24
61
Right Side
1
2.5
24
61
Top
1
2.5
12
30
Back
1
2.5
12
30
Front
1
2.5
36
91
Dimensions in inches cm
Per venting system
supplier's instructions
Vent
Electrical
Data
Required Clearance From
Combustible Material
MT2H & MT2V
(non-pump mounted)
Size
500–750
1000-2000
Boiler / Heater Circuit Size
Volts
Phase
120
Single
Amps
15
20
Pump Circuit Requirements
Pilot Duty
Phase
24V
Single
Power
Up
to
25VA
Blower
Circuit
Included
in Boiler
Circuit
Dimensional
Data
Size
500
A
33¾
85
B
16¾ 43
C
6½
D
17
10
E
25
8
20
Air
Conn.
W
6 15
Vent
Conn.
V
8 20
750
45¾
116
22¾
53
6½
17
10
25
9½
24
6
15
10
25
1000
57¾
147
28¾
73
6½
17
10
25
9½
24
8
20
10
25
1250
68¼
173
34
87
10¼
26
10
25
9
23
8
20
12
30
1500
78¾
200
39½ 100
10¼
26
10
25
9
23
8
20
12
30
1750
89¼
227
44¾
113
10¼
26
10
25
9
23
8
20
14
36
2000
99¾
253
49¾ 127
10¼
26
10
25
9
23
12
30
14
36
Dimensions shown in inches cm.
Dimensions and specifications subject to change without notice in accordance with our policy of continuous product improvement.
800.900.9276 • Fax 800.559.1583 (Customer Service, Service Advisors)
20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355 (Applications Engineering)
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130
www.Laars.com
Litho in U.S.A. © Laars Heating Systems 1007 Document 1212B
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