Carlin 702GAS Inst Manual - Manual (Page 10)

Model 702GAS Advanced gas burners — Instruction manual
Carlin part number MN702G Rev. 03/14/11 – 10 –
Where appliance instructions differ from this manual, follow the appliance instructions.
Inspect burner and components
• Check the air tube length. Verify the usable length of the tube UTL will be
long enough (see “Mount burner in appliance”).
• Visually inspect all burner components and wiring.
• Verify that wiring is intact and leads are securely connected.
• Verify that all burner components are in good condition.
Do not install or operate the burner if any component is
damaged or if burner does not comply with other guidelines
of this manual and the appliance manual.
Mount burner in appliance
Welded-flange burners
1. Verify the bolt pattern on the appliance chamber matches the flange
pattern.
2. Verify the insertion depth (UTL) matches the depth of the appliance open-
ing (so the end of the air tube is flush with, or slightly short of, the inside
surface of the combustion chamber).
3. Place gasket onto boiler front plate.
4. Slide the end of the air tube into the opening and secure the flange to the
boiler front plate.
Burners with adjustable flanges
1. Verify the flange mounting slots will line up with the appliance bolts. (See
Figure 4 for adjustable flange dimensions.)
2. Place the flange gasket in position on the appliance mounting plate.
3. Measure the distance from the inside of the combustion chamber to the
outside of the appliance mounting plate. Slide the adjustable flange on the
air tube until it is this distance from the end of the air tube.
4. Mark this position of the flange on the air tube with a pencil or pen so you
can verify the flange is correctly positioned as you complete the installation.
The end of the air tube must be flush, or almost flush, with the inside of
the combustion chamber wall. (See Figure 3, page 9)
5. Tighten the flange locking screws finger tight.
6. Insert the air tube/flange assembly into the appliance opening. (Rotate the
flange if needed to align with the mounting bolts.) Secure the flange to the
appliance front plate. Tighten the flange locking screws.
7. See the following instructions to install the burner pedestal, needed to
properly support the burner.
A forced draft adjustable flange must be sealed to the air
tube to prevent possible leakage of flue products. Failure
to comply could result in severe personal injury, death or
substantial property damage.
Figure 4 Adjustable flange
2. Prepare site • assemble burner • mount burner
(continued)
Install the burner pedestal
702GAS burners supplied with an adjustable flange are
also supplied with a pedestal for supporting the burner. (The
pedestal is available as an option for a burner equipped with
a welded flange.)
1. Adjust the pedestal so that the height of the air tube matches the location
of the burner opening.
2. The pedestal has approximately 3” of adjustment. If the burner opening is
too high for the pedestal to rest on the floor, then construct a base. Two
solid cement blocks, side by side, is recommended. Alternate the direction
as layers are put down.
3. Place a spirit level on the air tube. Adjust the pedestal so the air tube
slopes down slightly toward the appliance. The slope should be about
2 degrees.
4. Tighten the pedestal bolt securely.
Install the combustion head
assembly
1. Follow the instructions on page 22 to remove the combustion head as-
sembly.
2. Check the position of the flame scanner sight pipe. The flame scanner sight
pipe assembly should be positioned so that the 3/8” pipe fits against the
retention ring assembly. Adjust if necessary. Then tighten the 1/8” Allen
screw to secure the tube in place.
3. Check the electrodes and reposition if necessary. Position the electrodes
as shown in Figure 5. These settings are critical in ensuring a reliable
ignition.
4. Once the electrodes are set, check all clamps to be sure they are securely
tightened.
5. Insert the combustion head assembly into the burner and secure in place.
See instructions on page 22.