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Ignition Systems
System 4
System 9
System 16
System 18
Firing Mode
On/Off
Motorized On/Off (FM & Minnesota Code only)
Gas Trains
Manual Valve
Redundant Safety Valve
Main Gas Regulator
Manual Firing Valve
Pilot Gas Regulator
Leak Test Valve
High Gas Pressure Switch
Low Gas Pressure Switch
Normally Open Vent Valve
Control Components
100% Shutdown on Flame Failure
100% Lockout Ignition Control
Manual Reset High Limit
Automatic Reset High Limit
Water Flow Switch
Water Pressure Switch
Pump Time Delay Relay (EM2)
Low Water Cutoff (w/man. reset & test button)
Water Ways
Copper Tubes
Cupro-nickel Tubes
Glass-Lined Cast Iron Headers
Bronze Headers
Codes
ASME CSD-1
IRI
FM
Kentucky
Minnesota
Size
CSD-1
CSD-1 + IRI
Code: JX
Code: JD
500
600
715
850
1,010
1,200
1,430
1,670
1,825
2,000
2200E/2450I
2800E/3050I
3200E/3500I
3600E/4050I
4000E/4500I
4500E/5000I
*Order ignition system 04.
MegaTherm MT Features and Options
500-1825
N/A
S
O
N/A
S
N/A
S
S
S
O
S
O
O
O
O
S
SP
S
O
S
N/A
S
O
S
O
S
O
O
O
O
S
O
Special Codes/Options
FM
Kentucky
Minnesota
Code: FX
Code: KC
Code: MX
Add CSD-1
Std.
Add CSD-1
Std.
Add CSD-1
Std.
Add CSD-1
Std.
Add CSD-1
Std.
Add CSD-1
Std.
Add CSD-1
Std.
Add CSD-1
Std.
Add CSD-1
Std.
Add CSD-1
Std.
Add CSD-1
Std.
Std.
Std.
Std.
Std.
Std.
2000-2450
2800-5000
N/A
O
N/A
N/A
O
O
S
S
S
S
N/A
O
S
S
S
S
S
S
O
O
S
S
O
O
O
S
O
O
O
O
S
S
SP
SP
S
S
O
S
O
O
S
S
N/A
N/A
O
O
S
S
O
O
S
S
N/A
N/A
O
O
O
O
O
O
S
S
O
O
Low
LWCO
High + Low
Water
100%
Gas Press
Cutoff
Lockout
Switch
Code: LC
Legend
S
= Standard
O
= Optional
SP = Standard with
CSD-1, spark
ignition propane
and standing
pilot. Optional on
spark ignition
natural
NA = Not Available
Heat Exchangers
Saltwater
Bronze
Cupro-
Bronze Hdrs/
Casting
Nickel
CuNi Tubes
Tubes
Order: K
Order: N
Order: S
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
5
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