Start Up Procedure; Burner Adjustment - Columbia EMG-31 120 Instructions Manual

6) Wire 120 VAC to the aquastat control. Ensure that the hot wire (black) is connected to the
L1 connector, the neutral wire (white) to the L2 connector and the grounding wire (bare) to
the green screw in the control panel. The burner, circulator and control are installed at the
factory and do not require any additional wiring. In addition, it is recommended that a
service disconnect be installed in line with the boiler so that the system may be de-energized
for maintenance and emergencies. All wiring performed at the installation must comply with
local code and NFPA -70 National Electric Code. See burner manual and control manual for
wiring instructions.
7) Follow burner manufacturers instructions for preparation, installation, mounting and
operation of the burner.
8) Connect the flue from the boiler to a 6" listed venting system. For chimney vent systems the
maximum horizontal length must not exceed 10'. Listed draft boosters and regulators may be
used to increase or decrease the draft respectively. The chimney flue must extend 3' above
the highest point of the roof line and 2' above the highest structure located in a 10' radius

Start Up Procedure

9) Make sure service switch to boiler is off.
10) Make sure boiler has been filled with water until entire system has been purged of air
(System pressure must not exceed 30 PSI).
11) Check burner and install desired orifice. See burner manual for instructions. All units are
shipped from the factory with an orifice for each firing rate and natural gas or LP gas. Select
the correct orifice for you application from the chart in this manual and install per burner
instruction manual.
12) Make sure all manual shut off valves in the gas line are open.
13) Bleed off any air in the gas line by attaching a 1/8" NPT nipple and stop cock to the inlet side
of the gas valve. Once a faint smell of gas is noticeable at the fitting, immediately shut off
the stop cock. Allow the gas to dissipate for a period of five minutes prior to proceeding to
the next step.
14) Set the low and high limit of the aquastat operating control to 160
15) Apply power to the system by turning the service switch on.
16) Review the burner manual for additional start-up and operating instructions.

Burner Adjustment

See burner manual for complete adjustment and operating instructions.
Note: The combustion chamber takes approximately 2 hours to cure after starting burner
operation. During that time elevated CO levels will occur until the chamber is cured.
17) For chimney vent applications drill out a small sampling port in the stack (locate
approximately 6" away from the boiler).
o
F and 180
8
o
F, respectively.