Part 2 - How The Boiler Operates - Munchkin Gas-fired Hot Water Boiler Manual

GAS-FIRED BOILER
PART 1: PRODUCT AND SAFETY INFORMATION
FREEZE PROTECTION FLUIDS
CAUTION
NEVER use automotive or standard glycol
antifreeze, even 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.
PART 2: HOW BOILER OPERATES
Munchkin Condensing Technology is an intelli-
gent system that delivers highly efficient hydron-
ic heating, while maximizing efficiency by meas-
uring the Data Parameters of your heating sys-
tem.
1. Stainless Steel Heat Exchanger
The highly efficient durable Munchkin
Stainless Steel Heat Exchanger is designed to
take the colder return water from the system
and extract the last bit of energy before it is
exhausted. The heat exchanger design is
separated by an internal baffle which diverts
the exhaust gas through the primary heat
exchanger into the secondary heat exchanger
where the colder return water extracts the last
residual heat.
2. Modulating Combustion System
Modulation during the central heating
operation is based on the supply temperature.
The set point used for the control depends
upon the programmed central heating curve.
The slope of the heating curve can be changed
by the installer of the Munchkin in the sense
that both turning points of the curve can be
moved. The control monitors the system to
regulate the output of the burner during
operation to match the system demand. This
increase in efficiency allows for substantial fuel
savings.
3. Gas Valve
The gas valve senses suction from the blower,
(CONT'D)
allowing gas to flow only if the gas valve is
powered and combustion air is flowing.
4. Supply water temperature sensor
This sensor monitors boiler output water
temperature (system supply). The control
module adjusts the boiler firing rate so the
outlet temperature is correct.
5. Return water temperature sensor
This sensor monitors the return water
temperature (system return). The control
module reduces or increases boiler input,
depending on how close the return water
t e m p e r a t u r e i s t o t h e o u t l e t w a t e r
temperature.
6. Temperature and pressure gauge
Allows the user to monitor the systems
temperature and pressure.
7. Control
The integrated control system monitors the
return and supply water and regulates the fan
speed to regulate the unit's BTU output. This
allows the unit to only deliver the amount of
heated energy required and nothing more!
8. Burner
Constructed of high grade stainless steel
construction, the burner uses pre-mixed air
and gas and provides a wide range of firing
rates.
Boiler Manual
6