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Please read before proceeding – Lochinvar 800 User Manual

Page 3

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Installation & Operation Manual

Please read before proceeding

Installer – Read all instructions,
including this manual and the Knight XL
Service Manual, before installing.
Perform steps in the order given.

User – This manual is for use only by a
qualified heating installer/service
technician. Refer to the User’s
Information Manual for your reference.

Have this boiler serviced/inspected by a
qualified service technician, at least
annually.

Failure to comply with the above could
result in severe personal injury, death or
substantial property damage.

Failure to adhere to the guidelines on this
page can result in severe personal injury,
death, or substantial property damage.

When servicing boiler –

• To avoid electric shock, disconnect electrical supply

before performing maintenance.

• To avoid severe burns, allow boiler to cool before

performing maintenance.

Boiler operation –

• Do not block flow of combustion or ventilation air to

the boiler.

• Should overheating occur or gas supply fail to shut off,

do not turn off or disconnect electrical supply to
circulator. Instead, shut off the gas supply at a location
external to the appliance.

• Do not use this boiler if any part has been under water.

The possible damage to a flooded appliance can be
extensive and present numerous safety hazards. Any
appliance that has been under water must be replaced.

Boiler water –

• Thoroughly flush the system (without boiler

connected) to remove sediment. The high-efficiency
heat exchanger can be damaged by build-up or
corrosion due to sediment.

• Do not use petroleum-based cleaning or sealing

compounds in the boiler system. Gaskets and seals in
the system may be damaged. This can result in
substantial property damage.

• Do not use “homemade cures” or “boiler patent

medicines”. Serious damage to the boiler, personnel,
and/or property may result.

• Continual fresh make-up water will reduce boiler life.

Mineral buildup in the heat exchanger reduces heat
transfer, overheats the stainless steel heat exchanger,
and causes failure. Addition of oxygen carried in by
makeup water can cause internal corrosion in system
components. Leaks in boiler or piping must be repaired
at once to prevent makeup water.

Freeze protection fluids –

• NEVER use automotive antifreeze. Use only inhibited

propylene glycol solutions, which are specifically
formulated for hydronic systems. Ethylene glycol is
toxic and can attack gaskets and seals used in hydronic
systems.

When calling or writing about the boiler –
Please have the boiler model and serial
number from the boiler rating plate.

Consider piping and installation when
determining boiler location.

Any claims for damage or shortage in
shipment must be filed immediately
against the transportation company by
the consignee.

Factory warranty (shipped with unit)
does not apply to units improperly
installed or improperly operated.

3

If the information in this manual is not
followed exactly, a fire or explosion may
result causing property damage, personal
injury or loss of life.

This appliance MUST NOT be installed
in any location where gasoline or
flammable vapors are likely to be present.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.
• Do not touch any electric switch; do

not use any phone in your building.

• Immediately call your gas supplier

from a near by phone. Follow the
gas supplier’s instructions.

• If you cannot reach your gas supplier,

call the fire department.

• Installation and service must be

performed by a qualified installer,
service agency, or the gas supplier.

ƽ WARNING

NOTICE

ƽ WARNING

ƽ WARNING