POST-START Check List GAS | Johnson Controls 340968-XIM-A-0108

2.Turn off all electric power to the appliance if service is to be performed.

3.Remove the control access panel.

4.Turn the gas valve switch to the OFF position. DO NOT FORCE.

5.Replace the control access panel.

POST-START CHECK LIST (GAS)

After the entire control circuit has been energized and the heating section is operating, make the following checks:

1.Check for gas leaks in the unit piping as well as the sup- ply piping.

2.Check for correct manifold gas pressures. See Checking Gas Input.

3.Check the supply gas pressure. It must be within the lim- its shown on rating nameplate. Supply pressure should be checked with all gas appliances in the building at full fire. At no time should the standby gas line pressure exceed 10.5", nor the operating pressure drop below 4.5" for natural gas units. If gas pressure is outside these limits, contact the local gas utility for corrective action.

MANIFOLD GAS PRESSURE ADJUSTMENT

Small adjustments to the gas flow may be made by turning the pressure regulator adjusting screw on the automatic gas valve. Refer to Figure 10.

340968-XIM-A-0108

		Line
½ NPT		Pressure
½ NPT		Pressure
(Inlet)		Tap
(Inlet)

FIGURE 11 - GAS VALVE - REAR

Adjust as follows:

1.Remove the cap from the valve body. See Figure 10 for location.

2.To decrease the gas pressure, turn the adjusting screw counterclockwise.

3.To increase the gas pressure, turn the adjusting screw clockwise.

NOTE: The correct manifold pressure for natural gas fur- naces is 3.5 IWG. The correct manifold pressure for propane (LP) is 10.0 IWG.

	Manual
	Pilot Gas Switch
	Adjustment
	(Remove Cap)	Electrical
		Connection
	Manifold
	Pressure	½ NPT
	Adjustment	½ NPT
	(Remove Cap)	(Outlet)
	Pilot Gas	Manifold
	Connection	Manifold
	Connection	Pressure Tap
		Pressure Tap

FIGURE 10 - GAS VALVE - FRONT

BURNER INSTRUCTIONS

To check or change the burners, CLOSE THE MAIN MAN-

UAL SHUT-OFF VALVE AND SHUT OFF ALL POWER TO THE UNIT.

1.Remove the two (2) #8 screws holding each burner in place.

2.Remove the burner assembly from the manifold assem- bly by moving the burner assembly forward, turn at an angle and pull back.

3.Burners are now accessible for service.

PILOT INSTRUCTIONS

To check, adjust or remove the pilot assembly, CLOSE THE MAIN MANUAL SHUT-OFF VALVE AND SHUT OFF ALL POWER TO THE UNIT.

The pilot flame should envelope 3/8 inch of the end of the flame sensor and not contain any yellow color, see Figure 12.

16	Johnson Controls Unitary Products

340968-XIM-A-0108 specifications

Johnson Controls 340968-XIM-A-0108 is a sophisticated component designed for advanced building management and automation systems. This device is engineered to enhance the performance and efficiency of HVAC (Heating, Ventilation, and Air Conditioning) systems, contributing significantly to energy conservation and optimal climate control in commercial and industrial environments.

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Energy efficiency is a key focus of the Johnson Controls 340968-XIM-A-0108. The device incorporates intelligent algorithms that optimize HVAC operations, significantly reducing energy consumption. By analyzing usage patterns and adjusting settings accordingly, it helps facilities decrease operational costs while maintaining ideal indoor conditions.

In addition to its operational efficiency, the Johnson Controls 340968-XIM-A-0108 features a user-friendly interface that simplifies monitoring and management. The intuitive design allows operators to easily access system data and make adjustments as necessary without requiring extensive technical knowledge. This feature enhances the overall user experience and promotes efficient building management.

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In conclusion, the Johnson Controls 340968-XIM-A-0108 stands out in the building automation market due to its compatibility, sensing technologies, energy efficiency, user-friendly interface, and reliable performance. These features make it an essential component for optimizing HVAC operations and ensuring sustainable building management practices.