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500-1825 2000-2450 2800-5000
Ignition Systems
System 4 N/A N/A O
System 9 S N/A N/A
System 16 O O O
System 18 N/A S S
Firing Mode
On/Off S S S
Motorized On/Off (FM & Minnesota Code only) N/A N/A O
Gas Trains
Manual Valve S S S
Redundant Safety Valve S S S
Main Gas Regulator S S S
Manual Firing Valve O O O
Pilot Gas Regulator S S S
Leak Test Valve O O O
High Gas Pressure Switch O O S
Low Gas Pressure Switch O O O
Normally Open Vent Valve O O O
Control Components
100% Shutdown on Flame Failure S S S
100% Lockout Ignition Control SP SP SP
Manual Reset High Limit S S S
Automatic Reset High Limit O O S
Water Flow Switch S O O
Water Pressure Switch N/A S S
Pump Time Delay Relay (EM2) S N/A N/A
Low Water Cutoff (w/man. reset & test button) O O O
Water Ways
Copper Tubes S S S
Cupro-nickel Tubes O O O
Glass-Lined Cast Iron Headers S S S
Bronze Headers O N/A N/A
Codes
ASME CSD-1 O O O
IRI O O O
FM OOO
Kentucky S S S
Minnesota O O O
Legend
S = Standard
O = Optional
SP = Standard with
CSD-1, spark
ignition propane
and standing
pilot. Optional on
spark ignition
natural
NA = Not Available
MegaTherm MT Features and Options
Size CSD-1 CSD-1 + IRI FM Kentucky Minnesota Low LWCO High + Low Bronze Cupro- Bronze Hdrs/
Water 100% Gas Press Casting Nickel CuNi Tubes
Cutoff Lockout Switch Tubes
Code: JX Code: JD Code: FX Code: KC Code: MX Code: LC Order: K Order: N Order: S
500 Add CSD-1 Std.
600 Add CSD-1 Std.
715 Add CSD-1 Std.
850 Add CSD-1 Std.
1,010 Add CSD-1 Std.
1,200 Add CSD-1 Std.
1,430 Add CSD-1 Std.
1,670 Add CSD-1 Std.
1,825 Add CSD-1 Std.
2,000 Add CSD-1 Std. N/A N/A
2200E/2450I
Add CSD-1 Std. N/A N/A
2800E/3050I
Std. N/A N/A
3200E/3500I
Std. N/A N/A
3600E/4050I
Std. N/A N/A
4000E/4500I
Std. N/A N/A
4500E/5000I
Std. N/A N/A
*Order ignition system 04.
Special Codes/Options Heat Exchangers
Saltwater