Field Controls installation instructions Diagram B - Internal Wiring Schematic for PVU-300

OPTIONAL GSK-3 EXHAUST GAS SPILLAGE DETECTOR SWITCH INSTALLATION

NOTE: Installation of the GSK-3 secondary safety switch is recommended for LP and Natural gas fired appliances with a draft hood. This switch will detect exhaust gas spillage out of the draft hood due to a blocked vent system and/or inadequate draft during operation. When this switch senses spillage it interrupts the power supply to the gas valve which terminates the burner operation.

1.	Mount the GSK-3 on the lower edge of the draft hood with the exposed
	thermal disk directed into the draft hood (See Figure 7)
2.	Route the electrical wires along the heating appliance cabinet within an
	accepted wiring enclosure in accordance with the National Electrical
	Code and any applicable local codes. Keep the wires away from any
	HOT surfaces.
3.	Wire the switch into the low voltage thermostat circuit. Refer to the	Figure 7
	appropriate wiring diagram in this manual.
4.	After installation, check the amperage through the thermostat circuit and adjust the anticipator if necessary.

CAUTION: The GSK-3 is a manual reset switch. Investigate the system thoroughly for the cause of any shut down and correct the problem before resetting the GSK-3 and restarting the system.

Diagram B – Internal Wiring Schematic for PVU-300

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