INSTALLATION (continued) PAGE 29
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Oil Burner Installation (continued)
NOTE: ALL OIL BURNERS MUST BE INSTALLED IN ACCORDANCE WITH NFPA
STANDARD #31.
In clean boilers, oil-burning efficiencies of 85%-87% can be expected as measured by stack
analysis.
Gas Burner Installation (refer to Gas Burner Manufacturer’s Instruction Manual)
The EXCEL Boilers may be fired on either natural gas or propane fuel. The G2T Gas Burner
by Adams have been tested and listed with the EXCEL boilers. Each Adams Burner is shipped
with two orifices. The smaller orifice for the EXCEL 2000 should be in place when the burner is
received. If you have an EXCEL 2200 you will need to change out the smaller orifice for the larger
one as per the instructions on page 13 of the gas burner instruction manual.
•TARM EXCEL 2000 •TARM EXCEL 2200
Maximum Input Orifice Maximum Input Orifice
LP Gas = .213 LP Gas = .257
Natural Gas = .260 Natural Gas = .312
NOTE: The installation of all gas burners must conform to the requirements of the
authority having jurisdiction, or in the absence of such requirements, to the
National Fuel Gas Code, ANSI Z 2231, or CAN/CGA B149 Installation Code.
In clean boilers, gas-burning efficiencies of 82-83% can be expected.
Important Venting Instructions for EXCEL Boilers with Gas Burners
A. MULTI-FUEL VENTING
The EXCEL multi-fuel boilers have the option of having two (2) separate flue collars: one
for wood burning and one for gas. If 2 flue collars are used, the plate positioned
diagonally over the gas heat exchange tubes should be positioned and fixed vertically.
Use gasketing to fully seal and separate the wood and gas heat exchange and flue exit
areas. A second flue collar can be purchased from Tarm USA, Inc.
B. SINGLE FLUE VENTING
The EXCEL multi-fuel boilers have been approved for single flue venting of wood and
gas in the same flue. However, a dual acting barometric damper and a spill switch with a
manual reset must be utilized. This spill switch is installed to detect flue gas spillage
caused by a blocked flue system and/or inadequate draft. This devise MUST be
installed by a qualified installer in accordance with the manufacturers’ installation
instructions included with the device.
NOTE: THE BOILER SHALL BE INSTALLED SUCH THAT THE GAS IGNITION
SYSTEM COMPONENTS ARE PROTECTED FROM WATER (DRIPPING,
SPRAYING, RAIN, ETC) DURING APPLIANCE OPERATION AND SERVICE
(CIRCULATOR REPLACEMENT, CONTROL REPLACEMENT, ETC.)
LEAK TESTING: The boiler water jacket and gas connection must be leak tested before putting the
boiler in operation
OVERHEATING:
When burning gas, should overheating occur, or the gas supply fail to shut off, do
not turn off or disconnect the electrical supply to the pump. Instead, shut off the gas supply at a
location external to the appliance.
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