Mod Con 300 - Page 6

GAS-FIRED BOILER Boiler Manual
5
PART 1: PRODUCT AND SAFETY INFORMATION (CONT’D)
BEFORE INSTALLING
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 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. Immediately call a qualified
service technician to inspect the boiler and to
replace any part of the control system and
any gas control that has been under water.
BOILER WATER
• If you have an old system with cast iron
radiators, 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. HTP
recommends a suction strainer in this type of
system.
• Do not use petroleum-based cleaning or sealing
compounds in 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.” Substantial property damage,
damage to boiler, and/or serious personal injury
n
WARNING
Installer — Read all instructions in this manual,
and Mod Con Venting section, before installing.
Perform steps in the order given.
User — This manual is for use only by a
qualified heating installer/service technician.
Refer to User’s Information Manual for your
reference.
User — Have this boiler serviced/inspected by
a qualified service technician annually.
Failure to comply with the above could result in
severe personal injury, death or substantial
property damage.
n
WARNING
Failure to adhere to the guidelines on this page
can result in severe personal injury, death or
substantial property damage.
n
WARNING
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
neighbor's phone. Follow the gas suppliers'
instructions.
• If you cannot reach your gas supplier, call the
fire department.
CAUTION
Due to the low water content of the boiler, mis-
sizing of the boiler with regard to the heating
system load will result in excessive boiler
cycling and accelerated component failure. Heat
Transfer Products DOES NOT warrant failures
caused by mis-sized boiler applications. DO
NOT oversize the boiler to the system. Modular
boiler installations greatly reduce the likelihood
of boiler oversizing.