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• Integral finned copper tube heat
exchanger. ASME 160 lb. working
pressure, 2-pass configuration
• Glass-lined cast iron headers
• Stainless steel burners
• Built-in integral draft hood
(indoor models)
• 115/24V transformer for 24V
control system
• Redundant safety gas valve
1
2
3
4
5
M
T
MODEL
SIZE MBTU/h
0500
2000
MT-POOL
0600
2200
0715
2450
0850
2800
1010
3050
1200
3200
1430
3500
1670
3600
1825
4000
4050
4500
5000
Indoor Units
STANDARD
SYS 4
SIZE
UNIT*
FOR FM &
SYS 9/16/18
MINNESOTA
500
6,622
600
6,888
715
7,061
850
7,505
1010**
7,926
1,200
8,325
1,430
8,694
1,670
9,417
1,825
9,772
2,000
13,273
17,055
2,450
14,013
17,993
3050
16,053
19,930
3500
17,858
21,570
4050
19,291
22,361
4500
20,841
26,130
5000
21,832
27,084
*Spark Ignition standard on Natural Gas and Propane models (Ignition 09).
**Available as Model 999 for local jurisdictions that limit input to 1,000,000 BTU/h.
CSD - 1 Code (JX)
500-2450:
• low water cutoff
(man. reset w/test button)
• manual firing valve (2nd shutoff valve)
• leak test valve
• 100% lockout
2800-5000:
• low water cutoff
(man. reset w/test button)
• manual firing valve (2nd shutoff valve)
• multiple leak test valves
• 100% lockout
• high & low gas pressure switches
4
Standard Features MegaTherm MT (500-5000)
• Manual shut-off valve
• Manual pilot valve
• Pilot gas regulator
• Electronic operating control with
remote thermometer
• Adjustable manual reset safety high
limit
• Pressure relief valve (75 PSI)
• Two temperature gauges
• Terminal strip
Model Nomenclature
6
7
8
LOCATION
I-INDOOR
E-OUTDOOR
FUEL
N-NATURAL
P-PROPANE
SHIP
WT
lbs.
N/A
808
N/A
819
N/A
873
N/A
945
N/A
1041
N/A
1199
N/A
1280
N/A
1445
N/A
1570
1950
2100
2250
2510
2750
2900
3200
CSD-1 + IRI Code Package (JD)
500-2450
• low water cutoff
(man. reset w/test button
• manual firing valve (2nd shutoff valve)
• leak test valve
• 100% lockout
• normally open vent valve
2800-5000:
• low water cutoff
(man. reset w/test button
• manual firing valve (2nd shutoff valve)
• multiple leak test valves
• 100% lockout
• high + low gas pressure switches
• normally open vent valve
9 10
11
C
IGNITION
VERSION
04- SPARK 110V
1-8 TUBE
09- SPARK 24V
B-10 TUBE
(500-1825)
C-18 TUBE
18- SPARK 24V
(2000-5000)
HEAT EXCHANGER
16- STND. PILOT
C-GLASS LINED/COPPER
N-GLASS LINES/CU-NI
FIRING MODE
K-BRONZE/COPPER
S-BRONZE/CU-NI
C-STD. ON/OFF
Outdoor Units
Standard
Sys. 4
Size
Unit *
for FM &
Sys. 9/16/18
Minnesota
500
7,693
N/A
600
7,900
N/A
715
8,153
N/A
850
8,468
N/A
1010**
9,170
N/A
1,200
9,594
N/A
1,430
9,990
N/A
1,670
10,177
N/A
1,825
10,976
N/A
2,200
15,521
18,307
2,800
17,590
20,324
3,200
19,828
22,819
3,600
20,820
23,677
4,000
22,239
26,003
4,500
23,252
27,750
FM Code (FX)
500-2450:
• add CSD-1
2800-5000:
• System 4
(see heater pricing)
• low water cutoff (manual
reset with test button)
• manual firing valve
(2nd shutoff valve)
• multiple leak test valves
• 100% lockout
• high & low gas pressure
switches
• normally open vent valve
• morotized safety valve
California Code (LC)
• order low water cutoff +
100% lockout
• 2 amp fuse
• EM
2
- pump time delay (500-1825)
• Power on/off switch
• Power on light
• Non-combustible base
(500-1825 Outdoor)
• Integral pump (500-1825)
• Water flow switch (500-1825)
• Water pressure switch (2000-5000)
12
13
14
REVISION
OPTIONS
P- PUMP
XX- STANDARD UNIT
500-1825
FX- FM CODE
A- 2000-5000
HL- HIGH + LOW GAS SWITCHES
JD- CSD1 + IRI CODE PACKAGE
JX- CSD-1
LC- L.W.C.O. + 100% LOCKOUT
LW-LOW WATER CUT OFF
MX- MINNESOTA CODE
CODE OPTIONS INCLUDE:
Ship
Weight
Minnesota Code (MX)
lbs.
500-850:
855
• low water cutoff (manual
949
reset with test button)
1050
• manual firing valve
1100
(2nd shutoff valve)
1240
• 100% lockout
• high gas pressure switch
1410
• additional safety valve
1570
1010-2450:
1622
• low water cutoff (manual
1725
reset with test button)
2320
• manual firing valve
(2nd shutoff valve)
2500
• leak test valve
2840
• 100% lockout
3175
• high & low gas pressure
3940
switches
3790
• solenoid safety valve
• motorized safety with
proof of closure
2800-5000:
• System 4
(see heater pricing)
• low water cutoff (manual
reset with test button)
• manual firing valve
(2nd shutoff valve)
• leak test valve
• 100% lockout
• high & low gas pressure
switches
• motorized safety valve
• motorized safety with
proof of closure
Kentucky Code (KC) (STD)
• 200° F (max.) automatic
reset high limit
• 200° F (max.) manual
reset high limit
15
16
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