MODU-FIRE® Forced Draft Gas-Fired Boiler
4
1.0 INTRODUCTION
The MODU-FIRE
®
Forced Draft gas-fired boiler is a revolutionary advance. Harsco Industrial, Patterson-Kelley
now combines full-modulation burner control and forced draft advances with our time-tested modular hot water
boiler design. The result is a
full-modulation boiler utilizing reduced vent sizing for installation and cost efficien-
cies. This boiler combines the best of our earlier designs with a new generation of burner, control and operating
technology. You will achieve high part-load efficiencies – but without the complexity you might expect in this type
of high performance boiler. It is high performance made simple and dependable for years of trouble-free opera-
tion.
This manual covers installation of the MODU-FIRE
®
Forced Draft boilers 750MFD, 1000MFD, 1500MFD and
2000MFD. The model numbers will include a prefix and may include a suffix to indicate special features or differ-
ent options. While details may differ slightly, basic operation is the same for all models. Boilers are built to oper-
ate with natural gas or propane. Check the rating label for the correct gas type and flow rate.
The boiler is only a part of the complete heating system. This boiler may be fully operational and yet, because of
poor circulation, controls, or other operating characteristics, not deliver heat to the desired location. Additional
equipment such as temperature sensors, pumps, flow switches, balancing valves and check valves will be re-
quired for satisfactory operation of any system. Harsco Industrial, Patterson-Kelley cannot be responsible for the
design or operation of such systems and a qualified engineer or contractor must be consulted.
2.0 SAFETY
2.1 G
ENERAL
The MODU-FIRE
®
Forced Draft gas-fired boiler must be:
•
Installed, operated, and serviced in accordance with instructions contained in this manual and other supple-
mental MODU-FIRE
®
Forced Draft boiler manuals.
•
Installed by qualified personnel in accordance with designs prepared by qualified engineers including: struc-
tural, mechanical, electrical, and other applicable disciplines.
•
Operated and serviced in accordance with a comprehensive safety program determined and established by
the customer. Do not attempt to operate or service until such a program has been established.
•
Operated and serviced by experienced, qualified, properly trained personnel in accordance with all applicable
codes, laws, and regulations.
•
Installation and service must be performed by a qualified installer or service agency.
2.2 T
RAINING
Proper training is the best protection against accidents
It is essential to read, understand, and follow the rec-
ommendations of this manual before installing, operat-
ing, or servicing this equipment. Failure to do so could
result in serious injury, death, and/or property damage.
