Bosch Singular 4000 Installation Instructions Manual page 5

Gas condensing combi boilers
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WARNING: FIRE, EXPLOSION
 Do not store combustibles, such as papers or laundry, near
the boiler or venting system.
 Do not store or use gasoline or other flammable liquids near
this boiler.
 Do not store or use compressed gases, such as hair sprays
or spray paints, near the boiler or venting system, including
the vent termination.
WARNING: HAZARDOUS VOLTAGE
 Do not remove the front cover unless the power to the boiler
is turned off or disconnected.
 Do not touch the internal components of the boiler or the
power cord with wet hands.
WARNING: FIRE, CARBON MONOXIDE
 Do not operate the boiler with the front cover opened.
 Do not operate the boiler without proper venting.
 Do not place anything in or around the vent terminals that
could obstruct the air fl ow in or out of the boiler.
WARNING: FIRE, EXPLOSION
 Have your installer or plumber show you the location of the
gas shut off valve and demonstrate how to close the valve. If
the boiler is damaged as a result of overheating, fire, flood,
or any other reason, close the manual shut off valve and do
not operate the boiler again until it has been inspected by a
qualified technician.
WARNING: FIRE, EXPLOSION
 Should overheating occur or if the gas supply fails to shut
off, turn off the manual gas shut off valve.
WARNING: PERSONAL INJURY, PROPERTY DAMAGE
 Do not allow children to operate or have access to the boiler.
Singular Combi Boiler - BTC 439003301 B (2021/07)
WARNING: IMPROPER OR DANGEROUS OPERATION
 Immediately call a qualified service technician to inspect the
appliance and replace any part of the control system and/or
any gas control which has been immersed in water.
WARNING:
 This product can expose you to chemicals including Lead
and Lead components, which are known to the State
of California to cause cancer and birth defects or other
reproductive harm. For more information go to
P65Warnings.ca.gov.
WARNING: FIRE, CARBON MONOXIDE
 After replacement of a gas related component, where a
gasket of seal has been disturbed or replaced, check for gas
tightness using a gas detector / analyzer.
 On re-assembly check all affected seals for cracks hardness
and deterioration. If damaged or in any doubt the seal must
be replaced.
CAUTION: INTENDED USE
 Do not use the boiler for anything other than its intended
purpose, as described in this manual.
CAUTION: IMPROPER OR DANGEROUS OPERATION
 Do not use unapproved replacement or accessory parts.
 When servicing the controls, label all wires prior to
disconnecting them to prevent wiring errors.
 Do not attempt to repair or replace any part of the boiler,
unless it is specifically recommended in this manual. For all
other service, contact an authorized technician or licensed
professional. Improper adjustments, alterations, service, or
maintenance may lead to property damage, personal injury,
or death and will void your warranty.
NOTICE: BOILER DAMAGE
 Do not turn on the boiler unless the water and gas supplies
are fully opened. Failure to do so may damage the boiler.
Installation Instructions
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