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VENT PIPE INSTALLATION
Warning
:
• Failure to follow the installation instructions could cause FIRE, CARBON MONOXIDE
POISONING, or DEATH.
• Never change the position of any dip switch other than No.7 & No.8.
• Unauthorized alteration and use of the unit in a wrong setting may cause material damage,
injury accident, scalding, or even death.
• Exceeding the maximum vent length is dangerous and may result in bad combustion.
• Be sure to connect the vent pipes in such a way so that no exhaust gas leaks when they are
installed in a concealed area, such as the attic.
Caution
:
• The edges of sheet metal parts may be sharp.
Always wear gloves and appropriate eye, foot, and other protections when handling these
products.
• It is recommended that experienced professionals familiar with the opration and maintenance of
heating appliances and vent / air intake system install this system.
These instructions are a guide to assist a professional installer.
• Before commencing installation, please read the installation instructions carefully.
• Failure to follow the installation instructions could cause not only the lower performance of
appliance but also property damage or personal injury.
• Different manufactures have different joint systems and adhesives.
Do not mix pipe, fitting, or joining methods from different manufacturers.
• Examine all components for shipping damage prior to installation.
Note
:
• In case D value is longer than 41, the unit shall be relocated with vent length of less than 41'.
• In case vent pipe requires extension, use coaxial vent pipe and elbows and start from the vent
terminal side.
• Install the vent pipe at slight decline toward the vent terminal. (refer to page 45)
• Install the vent pipe securely by using sling fittings to support the connected parts.
• Use fittings at 5' (1.5m) intervals. Do not use wire.
• When installing extended vent pipe :
Take special precaution to stay clear of combustible surfaces.
• In case of horizontal direct vent installation, be sure to use recommended vent terminal.
• In case of horizontal direct vent installation with recommended vent terminal, connect reducer
between water heater and vent terminal.
• In case of other horizontal direct vent installation, connect reducer between pipe and vent
terminal.
Summary of Contents for MWH-180
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