MACH
®
Gas Fired Boiler
36
Following all gas valve adjustments, check for proper light-off and verify correct fuel/air mix and combustion quality
throughout the entire firing range (from low fire to high fire).
3.11.2 Checking Flame Signal
Using the control panel, enter the information mode and scroll down to FLAME SIGNAL. When the boiler is firing, the
FLAME SIGNAL will be “yes” or a 0-10 uA signal and when the boiler is not firing, the FLAME SIGNAL will be “no” or
a 0-10 uA signal.
4 OPERATION
4.1
G
ENERAL
4.1.1 Control Panel
Become familiar with the basic operation of the boiler. The
operating instructions are located inside the gray door at the front of
the boiler.
4.1.2 Tests
All Harsco Industrial, Patterson-Kelley boilers are fire tested at the
factory prior to shipment. This procedure includes testing of the
limits and adjustment of combustion parameters. This testing and
setup information is recorded on the “Factory Fire test” label
located on the back of the boiler.
4.2
N
ORMAL
L
IGHTING AND
S
HUT
-D
OWN
P
ROCEDURES
Do not use this boiler if any part has been under water. Immediately call a
qualified service technician to inspect the boiler and to replace any part of the control system and any
gas control which has been under water.
4.2.1 Initial Lighting Procedures
1. Make sure the system is filled with water and water is circulating in the system. Turn on electrical supply and open
the gas supply valves to the boiler.
2. Turn the on/off switch to the on position. If an error is indicated, see Section 5.5 of this manual to troubleshoot the
problem and take the necessary corrective action before proceeding.
3. Set the desired high temperature limit and operating temperature. The controller will now complete the automatic
firing sequence.
4.2.2 Normal Shut Down Procedures
1.
Turn the on/off switch to the off position.
2. Close all manual gas valves. (For extended period.)
4.2.3 Emergency Shut-Off
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.
Main Gas Cock