Installation / Operation Instruction Manual

60
Troubleshooting
RTG-K-199/160N/X1 – 6 720 817 984 (2022/06)
8.10 Manifold gas pressure
DANGER:
Fatal accidents!
When the appliance is operating with the front cover removed:
▶ Do not stand in front of the appliance.
▶ Avoid breathing the combustion flue gases.
▶ Turn off the appliance and install the front cover assembly
when adjustments and measurement are complete.
The manifold gas pressure measurement is only carried out if it
is necessary to confirm the value from the rating plate.
In case of a high deviation between measured and stated
values, please proceed with Gas/air adjustment (see
section 8.11)
1)
.
▶ Turn Off the appliance.
▶ Remove the front cover of the appliance (see page 12).
Do not disconnect the wire from HMI (display).
Fig. 56 Pressure head points
[A] Air pressure head in the box
[B] Gas pressure head in the burner
[C] Tee (installer supplied)
▶ Loosen the set screw of the pressure head point [B].
▶ Connect the pressure gauge connection "+" to the test
point [B].
▶ Loosen the set screw of the pressure head point [A].
▶ Connect the pressure gauge "-" to the pressure head point
[A].
▶ Turn On the appliance.
▶ Position the front cover near the appliance so the display
cable can be connected to the appliance.
▶ Place the front cover with the HMI near the appliance.
▶ Open all hot water taps to achieve a flow rate of at least 6
gallons per minute. (1 tub and 2 sinks should be sufficient).
If heater goes back to P2, open more hot water fixtures to
allow sufficient flow and access to P1 menu.
▶ Record the manifold gas pressure reading in table 28.
Manifold gas pressure refers to the relative pressure
between gas manifold nozzles inlet and outlet [A]-[B].
Table 28
▶ Turn Off the appliance.
▶ Disconnect the pressure gauges from the pressure heads
points [A] and [B].
▶ Tighten the shutter screws of the pressure heads points [A]
and [B].
▶ Reassemble the front cover onto the appliance.
▶ Turn ON the appliance to return to normal operation.
8.11 Adjusting Gas/Air flow
DANGER:
Risk of CO poisoning!
Gas air/flow adjustment is performed with the front cover of the
appliance removed. Avoid exposure to exhaust vent gases. Do
not stand in front of the exhaust vent while appliance is
operating.
Appliance is pre-adjusted by default with factory
parameters.
Gas/Air adjustments are only required when;
• The appliance is converted to LPG and energy content is
more than 2820 BTU/cu ft( section 6.7.1).
• After installation, the appliance shows repeated
unresolved errors ( chapter 9).
1) Manifold gas pressure from the rating plate is valid for sea
level operation with standard gas pressure and
composition. If operating conditions are different from
those, values from section 8.11 should prevail over
manifold gas pressure to assure a correct appliance tuning.
Value Date
Manifold gas
pressure