Navien NP-180 Service Manual page 17

IMPORTANT SAFETY PREAUTIONS
• Read and understand this safety information before operating or servicing this
Navien Water Heater.
• This manual must remain with the Navien Water Heater.
• Confirm the location of the gas shut-off valve. Close the manual shut-off valve
if the Navien Water Heater over becomes subjected to overheating, fire, flood,
physical damage or any other such damaging condition during servicing.
• DO NOT turn on the water heater unless water and gas supplies are fully
opened.
• DO NOT turn on the water heater if cold water supply shut-off valve is closed.
• Make certain power to water heater is "OFF" before removing the front cover for
any reason.
• Label all wires prior to disconnection when servicing controls. Wiring errors
can cause improper and dangerous operation. Verify proper operation after
servicing.
• Improper adjustment, alteration, service or maintenance can cause property
damage, personal injury, or death.
• To prevent scalding, always check the temperature of the hot water afterservicing.
• DO NOT attempt to change the water temperature while someone is using the
water heater.
• DO NOT use parts other than those specified for this equipment.
• DO NOT operate the water heater if you feel something is wrong with the unit.
• DO NOT allow children to operate or otherwise handle the unit.
INSTALLATION REQUIRMENT
• Installation condition may affect the servicing. Read all related information in the
"Condensing Water Heater Manual".
• The Navien Water Heaters must be installed according to all local and state
codes or, in the absence of local and state codes, the most recent edition of the
"National Fuel Gas Code (ANSI Z223.1/NFPA 54)" in the USA or the "National
Gas and Propane Installation Code (CAN/CSA B 149.1)" in Canada.
• Massachusetts code requires this water heater to be installed in accordance
with Massachusetts Plumbing and Fuel Gas Code 248 CMR Section 2.00 and
5.00.
©Navien America Inc. 2010
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NR/NP series service Manual Version 2.0