GAS-FIRED BOILER Boiler Manual
6
PART 2: BEFORE YOU START
A. WHAT’S IN THE BOX
Also included with the Mod Con are:
• Pressure and Temperature Gauge
• Outdoor Sensor
• Installation Manual
• Warranty
• CSD-1 Form
• H-3 Data Sheet
B. HOW BOILER OPERATES
Mod/Con Condensing Technology is an intelli-
gent system that delivers highly efficient
hydronic heating, while maximizing efficiency
by measuring the data parameters of your heat-
ing system. Outlined below are the features of
the system and how they operate:
1. Stainless Steel Heat Exchanger – The highly
efficient Mod/Con Stainless Steel Heat
exchanger is designed to use the cold return
water from the system and extract the last bit
of heat before it is exhausted.
2. Modulating Combustion System – The
combustion system will modulate the output
of the burner during operation to match the
system demand and achieve the control set
point while in operation. The set point can
change by internal or external signals which
enhance the overall performance of the
system.
3. Control – The integrated control system
monitors the system and regulates the fan
speed to control the boilers output. This
allows the boiler to only deliver the amount
of heated energy required and nothing more.
This control can be set up to monitor outdoor
temperature through an outdoor sensor to
regulate the set point of the boiler. The
system can be further enhanced by
connecting up to an indirect water heater to
provide domestic hot water.
The control can regulate the output of
multiple boilers through its cascade system
function. The cascade system is capable of
connecting up to eight boilers together in
such a way that they function as one boiler
system. This allows for greater turn down
ratios and provides systematic control of the
multiple boilers in an installation to minimize
downtime and maximize efficiency.
The cascade system works by establishing
one boiler as the master and the other
connected boilers as followers. The master
boiler will have a cascade system sensor and
a cascade pump connected to it in addition to
its own boiler pump. The follower boilers will
PART 1: PRODUCT AND SAFETY INFORMATION
(CONT’D)
CAUTION
Consider piping and installation when
determining boiler location.
n
CAUTION
NEVER use automotive or standard glycol
antifreeze, ethylene glycol made for hydronic
systems. Use only inhibited propylene glycol
solutions, which are specifically formulated for
hydronic systems. Ethylene glycol is toxic and
can attack gaskets and seals used in hydronic
systems.
may result.
• Continual fresh make-up water will reduce boiler
life. Mineral buildup in the heat exchanger
reduces heat transfer, overheats the stainless
steel heat exchanger, and causes failure.
Addition of oxygen carried in by make-up water
can cause internal corrosion in system
components. Leaks in boiler or piping must be
repaired at once to prevent make-up water.
FREEZE PROTECTION FLUIDS
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