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GAS PIPING
• Install the manual gas control valve in the gas inlet connection of MWH-180.
• A union should be used to connect the unit and the gas pipe.
• Check the gas type and the gas inlet pressure before connecting.
• Remove the screw from the test plug before checking the gas inlet pressure.
Connect the manometer to the plug with the silicon tube and measure the gas inlet pressure.
• The maximum and minimum gas inlet pressures are as follows.
< Natural Gas supply pressure >
Min. 4" W.C.
(102mmH
2
O)
Max. 10.5" W.C.
(267mmH
2
O)
< Propane Gas supply pressure >
Min. 8" W.C.
(203mmH
2
O)
Max. 14" W.C.
(356mmH
2
O)
• Put the screw back in the test plug and fasten tightly.
• Make sure to conduct gas leakage test before operating MWH-180.
WATER PIPING
• Install a manual water control valve in the water inlet connection of MWH-180.
• A union should be used on both the hot and cold water supply lines for connection.
• Use soldering materials or piping that will not cause any deterioration of potable water.
NO LEAD!
• Purge the water lines to remove all debris and air.
• Make sure both the hot and cold water supply lines are connected correctly.
• A filter is placed at the water supply inlet to remove debris.
Clean the filter regularly.
Do not operate the unit without the filter in place.
In areas of heavy debris, such as with some wells, install a whole house water filter in line before
the unit.
• 15 PSI or higher water pressure is required to operate MHW-180.
Summary of Contents for MWH-180
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