Gas Conversion Kit Manual

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4
Measuring and adjusting CO2 levels
2 Measuring and adjusting CO
2
levels
The CO
2
can only be adjusted by a certified gas
technician with a calibrated CO
2
analyzer.
Static Gas Pressure: " WC
P1 Operating Pressure: " WC
The P1 minimum operating pressure is 5" WC for
Natural Gas and 11"WC for Propane. Do not proceed
in adjusting CO
2
until pressure is at or above these
levels, but not to exceed 14” WC.
A. Once Pressure is adequate
B Turn ON/OFF switch to the OFF (O) position.
B Remove brass flat head screw on the exhaust collar,
see Fig. 5.
B Insert CO
2
analyzer probe into the measuring port.
Avoid air gaps between probe and measuring port.
The tip of the probe should be in the center of the flue
pipe (approx 1.5" inserted).
Fig. 5
B While holding in the Program (P) button, turn the
ON/OFF switch to ON (I) position (see Fig. 6). As
soon as ‘188’ flashes on the display, release the
Program button. The display should now read P2.
Fig. 6
B. Measuring CO
2
(Cover Installed):
B Open hot water taps to achieve a flow rate of at least
4 gallons per minute. (1 tub and 2 sinks should be
sufficient).
B Record the CO
2
reading in P2 below. (Analyzer read-
ing may take several minutes to stabilize).
B Press the ‘+’ button until P1 appears. Unit will ramp
up to high fire and the water flow should increase.
B Record the CO
2
reading in P1 below.
P2 CO
2
Reading: % CO
2
P1 CO
2
Reading: % CO
2
Compare your readings to those found in table 1 under
the “With Front Cover” column. If CO
2
readings are off
make adjustments as outlined below.
Note: The “Without Front Cover” column give
approximate values with the cover off to ease the
adjustment process. Final readings should be taken
with the cover on.
C. Adjusting CO
2
:
Note: P1 adjustment will change the P2 reading.
Confirm the P1 value BEFORE adjusting the P2 level.
1. P1 CO
2
level adjustment:
B Loosen yellow painted Philips screw (1) and rotate
cover down (2) revealing a brass slotted screw.
Fig. 7.
B Adjusting the slotted screw counter clockwise will
raise P1 CO
2
levels and clockwise will lower P1
CO
2
levels. Adjustments to the slotted screw will
also change P2 CO
2
levels.
2. P2 CO
2
level adjustment:
B Remove yellow painted #40 Torx cover from the front
of the gas valve. (Fig. 8) A plastic #40 Torx screw will
be revealed.
B Adjusting the plastic #40 Torx screw counter clock-
wise will lower P2 CO
2
levels and clockwise will
raise P2 CO
2
levels.
Note: This screw adjustment is very sensitive and may
take several minutes to stabilize.
3. Verify both P1 and P2 are within the ranges specified
in table 1 under the “With Front Cover” column. Repeat
steps 1 and 2 as necesssary until CO
2
values are within
the specified ranges.
Caution: One factor that may affect
CO
2
levels is improper gas pressure.
Please see Chapter 2.12 of manual for
the procedure to measure gas pressure
and record your findings below: