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Lx – WH Series
9.0 GAS VALVE AND BURNER SET-UP
The Trinity Lx gas valve must be set-up by a licensed Gas Technician. Improper set-up
may result in incorrect operation, damage to components or property, injury or death.
Combustion Calibration Procedure
To calibrate burner combustion, perform the following procedure using a calibrated combustion analyzer
capable of measuring CO
2
1.
Set analyzer to the appropriate fuel (Natural Gas or Propane).
Gas Line Pressure Test – monitor gas line pressure throughout all combustion tests and verify it is
2.
maintained within tolerance. See Gas Line Pressure Test below.
Set Throttle Screw – operate burner to the maximum modulation rate (see Table 9-2); set combustion
3.
according to Table 9-1 using the Throttle Screw; allow time for the analyzer readings to stabilize between
adjustments – record CO
Set Offset Screw – operate burner to the minimum modulation rate (see Table 9-2); using the Offset Screw,
4.
set the CO
to 0-0.5% lower than the value obtained during the maximum modulation rate test (e.g. if CO
2
at Max = 9.0%, then CO
Combustion Calibration is mandatory upon installation and during each annual
service.
instructions may result in incorrect combustion leading to burner damage or excessive
Carbon Monoxide concentrations causing property damage, personal injury or death.
Carbon Monoxide - Never leave the unit operating while producing Carbon Monoxide
(CO) concentrations in excess of 175 ppm. Failure to follow this warning may result in
serious injury or death.
Throttle Screw Adjustment
The gas valve Throttle Screw (see Figures 9-1 to 9-4) is used to calibrate the CO
operating at or near the maximum modulation rate (see Table 9-2). Turning the Throttle Screw in (clockwise)
decreases the CO
concentration. Turning the Throttle Screw out (counterclockwise) increases the CO
2
concentration. Typical adjustment required is 0 –
NOTE:
Calibration of the Throttle Screw should only be performed with the burner operating at or near the
maximum modulation rate (see Table 9-2).
Adjustments to the Throttle Screw may only be made by a qualified gas technician
using a calibrated combustion analyzer capable of measuring CO
may only be performed if the gas line pressure is maintained above minimum levels
throughout the duration of the test (see Table 9-1). Failure to follow these instructions
may result in serious injury or death.
Offset Screw Adjustment
The gas valve Offset Screw (see Figures 9-1 to 9-4) is used to calibrate the CO
vs. maximum modulation. Turning the Offset Screw in (clockwise) increases the CO
modulation rate. Turning the Offset Screw out (counterclockwise) decreases the CO
modulation rate. Typical adjustment required is 0 -
NOTE:
Calibration of the Offset Screw must only be performed with the burner operating at the minimum
modulation rate (see Table 9-2).
Adjustments to the Offset Screw may only be made by a qualified gas technician using a
calibrated combustion analyzer capable of measuring CO
burner at the minimum modulation rate (see Table 9-2). Attempting to set the Offset
Screw while the burner is operating at a modulation rate other than the minimum will
result in incorrect combustion and may lead to burner damage or excessive CO.
Installation and Operation Manual
and CO from a Natural Gas or Propane burning appliance:
value. See Throttle Screw Adjustment below.
2
at Min must = 8.5-9.0%). See Offset Screw Adjustment below.
2
Failure to perform the Combustion Calibration in accordance with these
1
/
2
1
/
of a turn in or out from the factory setting.
th
of a turn in or out from the factory setting.
8
│
Trinity Lx-WH
concentration with the burner
2
and CO. Adjustments
2
offset at minimum modulation
2
concentration at minimum
2
concentration at minimum
2
and CO, and only with the
2
2
2
35
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