State Industries SUF-60-120, SUF-100-250 Intake Air Connection, Intake Air Screen

11.If installing 3 inch vent pipe connect the vent pipe to the exhaust elbow on the water heater.

12.If installing 4 inch vent pipe transition to 3 inch pipe at the exhaust elbow on the water heater as shown in Figure 18 on page 25. The field installed 3” pipe between the exhaust elbow and the 4” x 3” reducer coupling should be 18 inches (45 cm) or less in length.

13.Ensure the Intake Air Screen on the Intake Air Connection to the water heater is removed before connecting the intake air pipe to the water heater. See Figure 19.

Breathing Hazard - Carbon Monoxide Gas

Do not obstruct water heater air intake.

Gas and carbon monoxide detectors are available.

Install water heater in accordance with the instruction manual.

Breathing carbon monoxide can cause brain damage or death. Always read and understand instruction manual.

Note: Do not leave the screen inside the Intake Air Connection for Direct Vent installations. Once the intake air pipe is installed the screen will be hidden from view and may become clogged with debris over time. This will cause improper combustion and may also lead to Blocked Intake Air fault conditions and associated control system lock outs.

120,000 & 150,000	199,000 & 250,000
Btu/hr MODELS	Btu/hr MODELS
	INTAKE AIR SCREEN
3 INCH INTAKE AIR CONNECTIONS
	FACTORY INSTALLED
INTAKE AIR SCREEN
(remove for Direct Vent)

14.If installing 3 inch intake air pipe connect the intake air pipe to the intake air connection on the water heater.

15.If installing 4 inch intake air pipe transition to 3 inch pipe at the intake air connection on the water heater as shown in Figure 20. The field installed 3” pipe between the intake air connection and the 4” x 3” reducer coupling should be 18 inches (45 cm) or less in length.

4” PIPE FIELD	3” PIPE FIELD	3” PIPE FACTORY
SUPPLIED	SUPPLIED	INSTALLED
INTAKE AIR
4” x 3” REDUCER	3” COUPLING OR TEE		COMBUSTION
			BLOWER
FIELD SUPPLIED	FACTORY INSTALLED

INTAKE AIR CONNECTION

INTAKE AIR CONNECTION

Figure 20

INSTALL TEE FITTING AS CLOSE TO WATER HEATER	INTAKE
INTAKE AIR CONNECTION AS POSSIBLE
	AIR
FACTORY
	PIPING
INTAKE AIR
CONNECTION
	FIELD SUPPLIED
	3” x 3” x 1/2” TEE
	WITH HOSE BARB
	FITTING INSTALLED
	CONNECT FIELD
	SUPPLIED FLEXIBLE
	DRAIN HOSE TO BARB
	FITTING AND FORM A
	LOOP WATER TRAP IN
	DRAIN HOSE
	RUN DRAIN HOSE
	TO SUITABLE FLOOR
	DRAIN SEPARATELY
	FROM OTHER
	CONDENSATE DRAINS

INTAKE AIR CONDENSATE TEE INSTALLATION

Figure 19 Figure 21

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