AERCO Esteem Users Guide - Manual (Page 5)

2
Emergency Shutdown
CAUTION!
DO NOT use this boiler if any part
has been under water. Call a qualifi ed
service technician to inspect and re-
place any part that has been under-
water.
IMPORTANT
The Installer must identify and indi-
cate the location of the emergency
shutdown manual gas valve to oper-
ating personnel.
Emergency Shutdown
If overheating occurs or the gas supply fails
to shut off, DO NOT turn off or disconnect
the electrical supply to the pump. Close the
manual gas shutoff valve (Figure 1) located
external to the unit.
Prolonged Shutdown
After prolonged shutdown, the startup pro-
cedures in the Installation and Maintenance
Manual should be followed, to verify all sys-
tem operating parameters.
Operating Cautions
• Do not block flow of combustion air. If
a blockage should occur and is eas-
ily accessible and removable, remove
it. If blockage is not obvious or cannot
be removed, have the unit and system
checked by a qualified service techni-
cian.
• Do not allow contaminated air to enter
the unit’s combustion air inlet. See page
3 for details.
• The Esteem is equipped with a low
water cutoff device (LWCO). The boiler
and system piping must be filled and
pressurized to 12 psig prior to startup.
The unit will shut down if the pressure
falls below 10 psig.
Boiler & System Water
• Have the boiler and system water chemis-
try checked at least annually by a qualified
service technician.
• Do not use petroleum-based cleaning or
sealing compounds in the boiler or system.
Gaskets and seals in the system may be
damaged. This can result in substantial
property damage.
• Do not use any product not specifically
designed for boiler / hydronic heating sys-
tems. Serious damage to the unit, piping
system, personnel and / or property may
result.
• Continual fresh makeup water will reduce
the life of the Esteem. Addition of oxygen
can cause internal corrosion in the system
components. All leaks in the piping sys-
tem must be repaired at once to prevent
makeup water.
• Do not add cold water to a hot unit.
Thermal shock can cause premature fail-
ure to the boiler heat exchanger.
To shut Down the Unit
Turn the external manual gas valve handle
clockwise
to “CLOSE”.
Figure 1: Typical Manual Gas Shutoff Valve
GF-125U