MACH® Series
Gas-Fired Boiler
Operation
Page 29
4.2.3 Emergency Shut-Off
The main gas cock should be closed immediately if an
emergency situation occurs.
4.3
T
YPICAL
B
OILER
O
PERATING
C
ONDITIONS
Natural Gas
*(1030 Btu/cu. ft.)
LP Gas
**(2500 Btu/cu. ft.)
Model
Number
Input
Rating
(Btu/hr)
Gas
Rate
(CFH)
Output
Capacity
(Btu/hr)
Gas
Rate
(CFH)
Output
Capacity
(Btu/hr)
Total
Amperage
300
300,000
291*
275,000
120**
275,000
8 amps or less
450
450,000
437*
414,000
180**
414,000
8 amps or less
750
750,000 728* 712,500
300*
712,500
8 amps or less
900
900,000
873*
846,000
360**
846,000
8 amps or less
1050
1,050,000
1019*
987,000
420**
987,000
8 amps or less
Note:
The heat exchanger is constructed and stamped for 50 psig maximum operating pressure and/or 200º F
maximum temperature.
Main Gas Cock
WARNING!
If overheating occurs or the gas supply
fails to shut off, do not turn off or
disconnect the electrical supply to the
pump. Instead, shut off the gas supply at a
location external to the boiler.
Emergency Shut-Off
