Gas Conversion Kit Manual

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Gas Type Conversion
7
Operating Gas Pressure Test
B Press ON/OFF button to turn off the appliance.
B Press and hold "Program" (P) button and press ON/
OFF button to turn appliance ON.
Fig. 13
B As soon as '188' is displayed, release "Program"
, button and the display should read P2.
B Press until P1 appears.
Note: While in this mode the appliance will run
constantly at maximum power and allow
maximum water flow.
For inlet gas pressure minimum specification, use the
following table:
B Turn on a high volume of hot water flow (at least 6
gpm) and heater will ignite. If heater display reverts to
P2, open more hot water fixtures to allow sufficient
flow. Press " " until P1 reappears on display.
B Operate all other gas appliances on same gas piping
system at maximum output.
B Record lowest operating gas pressure reading in
table 4.
Gas pressures lower than 3.5" W.C. for Natural Gas or
8" W.C. for LPG will result in insufficient degree rise to
the hot water, reduced hot water volume, possible error
codes and must be corrected. See Gas Connections in
the installation manual.
P1 fan speed (Factory default):
Lowering P1 fan speed reduces the maximum BTU
input.
As a temporary measure if the gas pressure in P1 is
below specification, lower P1 fan speed incrementally
until minimum inlet gas pressure reaches specified
range (Table 2). After raising gas pressure, reset
appliance to P1 factory default setting.
Fig. 14 Gas pressure test port (left tapping)
3.1 Adjusting CO
2
The CO
2
can only be adjusted by a certified gas
technician with a calibrated CO
2
analyzer.
Gas type NG LPG
P1 pressure 3.5” WC 8” WC
Table 2 Minimum inlet gas pressure under full
operation
Model NG LPG
830ES 42 40
940ES 48 46
940ESO 48 46
GWH 715 ES 48 46
Evolution 500 48 46
GWH 2700 ES 48 46
GWH 2400 ES 42 40
Table 3 Fan speed values for P1 (factory default)
Static Gas Pressure Reading
enter here: ______________ " WC Date: ___________
Operating Gas Pressure Reading
enter here: ______________" WC Date: ___________
Table 4
i
CO
2
adjustment is required in
installations above 2,000ft. (610m),
and in Natural Gas installations where
energy content is less than 900 BTU/
cu ft, and in installations with repeated
unresolved EA and EC errors (ref. to
"Problem solving" section of the
installation manual.).