10
GAS-FIRED BOILER Boiler Manual
or rain during operation or service.
4. If the Munchkin Boiler is to replace an
existing boiler, check for and correct any
existing system problems such as:
• System leaks.
• Incorrectly-sized expansion tank.
• Lack of freeze protection in boiler water
causing system and boiler to freeze and leak.
• Excessive glycol which will affect the
boiler system operation.
D. CLEARANCES FOR SERVICE ACCESS
1. See Figure 3-1 for recommended service
clearances. If you do not provide minimum
clearances shown, it might not be possible to
service the boiler without removing it from
the space.
PART 3: PREPARE BOILER LOCATION (CONTINUED)
E. RESIDENTIAL GARAGE INSTALLATION
Precautions
Take the following special precautions when
installing the boiler in a residential garage. If the
boiler is located in a residential garage, per ANSI
Z223.1, paragraph 5.1.9:
• Mount the boiler with a minimum of 18
inches above the floor of the garage to the
bottom of the boiler to ensure the burner and
ignition devices will be no less than 18 inches
above the floor.
• Locate or protect the boiler so it cannot be
damaged by a moving vehicle.
F. EXHAUST VENT AND INTAKE AIR VENT
The Munchkin Boiler requires a special vent sys-
tem, designed for pressurized venting.
Munchkin Boilers are rated ANSI Z21.13
Category IV (pressurized vent, likely to con-
dense in the vent).
You must also install air intake piping from out-
side to the boiler flue adaptor. The resultant
installation is categorized as direct vent (sealed
combustion). Note: To prevent combustion
air contamination see Table 3-2 in this
section when considering exhaust vent
and intake air vent termination.
Intake and exhaust must terminate near each
other and may be vented vertically through the
roof or out a side wall. The intake and exhuast
venting methods are detailed in the Venting
Section. Do not attempt to install the Munchkin
Boiler using any other means. Be sure to locate
the boiler such that the air intake and exhaust
WARNING
The space must be provided with combus-
tion/ventilation air openings correctly sized for
all other appliances located in the same space as
the Munchkin boiler. The boiler cover must be se-
curely fastened to the boiler to prevent boiler
from drawing air from inside the boiler room.
This is particularly important if the boiler is lo-
cated in the same room as other appliances.
Failure to comply with the above warnings could
result in severe personal injury, death or sub-
stantial property damage.
Figure 3-1: Clearances required
80M/140M/199M/399M
T50M/T80M