AERCO KC1000 Low NOx Water Heater July 2011 - Manual (Page 6)

SAFETY PRECAUTIONS
1-2
WARNING!
ELECTRICAL VOLTAGES OF 120
VAC ARE USED IN THIS EQUIP-
MENT. THEREFORE THE COVER
ON THE UNIT’S POWER BOX
(LOCATED ON THE FRONT RIGHT
SIDE OF THE UNIT UNDER THE
HOOD AND SHEET METAL SIDE
PANEL) MUST BE INSTALLED AT
ALL TIMES, EXCEPT DURING
MAINTENANCE AND SERVICING.
CAUTIONS!
Must be observed to prevent equipment
damage or loss of operating effectiveness .
CAUTION!
Many soaps used for gas pipe leak testing
are corrosive to metals. The piping must be
rinsed thoroughly with clean water after leak
checks have been completed.
CAUTION!
DO NOT use this heater if any part has been
under water. Call a qualified service
technician to inspect and replace any part
that has been under water.
1.2 EMERGENCY SHUTDOWN
If overheating occurs or the gas supply fails to
shut off, close the manual gas shutoff valve
(Figure 1-1) located external to the unit.
IMPORTANT
The Installer must identify and indicate the
location of the emergency shutdown manual
gas valve to operating personnel.
1.3 PROLONGED SHUTDOWN
After prolonged shutdown, it is recommended
that the startup procedures in Chapter 4 and the
safety device test procedures in Chapter 5 of
this manual be performed, to verify all system-
operating parameters. If there is an emergency,
turn off the electrical power supply to the
AERCO heater and close the manual gas valve
located upstream the unit. The installer must
identify the emergency shut-off device.
MANUAL GAS SHUTOFF VALVE
VALVE OPEN VALVE CLOSED
Figure 1-1
Manual Gas Shutoff Valve
IMPORTANT – FOR MASSACHUSETTS INSTALLATIONS
Water heater Installations within the Commonwealth of Massachusetts must conform to the following
requirements:
• Heater must be installed by a plumber or a gas fitter who is licensed within the Commonwealth of
Massachusetts.
• Prior to unit operation, the complete gas train and all connections must be leak tested using a
non-corrosive soap.
• The vent termination must be located a minimum of 4 feet above grade level.
• If side-wall venting is used, the installation must conform to the following requirements extracted
from 248 CMR 5.08 (2):