Lochinvar 402 - 2072 Exhaust fans, Combustion air filter, 6 MetalPanel Covering Side Combustion

Installation & Operation Manual

1 Determine unit location

Exhaust fans

Any fan or equipment which exhausts air from the boiler room may deplete the combustion air supply and/or cause a down draft in the venting system. Spillage of flue products from the venting system into an occupied living space can cause a very hazardous condition that must be immediately corrected. If a fan is used to supply combustion air to the boiler room, the installer must make sure that it does not cause drafts which could lead to nuisance operational problems with the boiler.

Vertical DirectAire™, Horizontal DirectAire™, and Direct Vent venting systems have specific requirements for combustion air ducts from the outside which are directly connected to the unit. See the requirements for combustion air duct in the venting section.

NOTICE	Use of filters having MERV (Minimum
	Efficiency Reporting Value) ratings higher than
	4 is not recommended. Higher efficiency
	low-micron filters can limit combustion
	air leading to either nuisance problems or
	potential component damage if used over
	prolonged periods of time. Filters having
	a MERV rating of 5 to 6 may be used
	on a limited basis during the construction
	phase of a project provided they are replaced
	once filter loading becomes apparent. After
	the construction phase is completed, it is
	recommended that the filter be changed to a
	4 or lower MERV disposable type filter.

Combustion air filter

This unit has a standard air filter located at the combustion air inlet. This filter helps ensure clean air is used for the combustion process. Check this filter every month and replace when it becomes dirty. The filter size on Models 402 - 752 is 12" x 12" x 1" (30.5cm x 30.5cm x 2.5cm) and 16" x 16" x 1" (40.6cm x 40.6cm x 2.5 cm) on Models 992 - 2072. You can find these commercially available filters at any home center or HVAC supply store.

For convenience and flexibility, you can direct the combustion air inlet from either the back or right side of the unit. To arrange the combustion air inlet for side entry, follow the steps below:

1.Remove the metal panel from the unit’s side wall (see FIG. 1-6).

2.Remove screws from the air filter/bracket assembly.

3.Move the filter/bracket assembly from the rear of unit to the side opening (see FIG. 1-7).

4.Attach filter/bracket assembly to the unit’s side using the pre-drilled screw holes.

5.Attach the metal panel to the rear combustion air opening to seal it off.

Figure 1-6_Metal Panel Covering Side Combustion	Figure 1-7_Moving Air Filter / Bracket Assembly from
Air Inlet	Rear of Unit to Side

NOTICE

CAUTION

During construction the air filter should be checked more frequently to ensure it does not become clogged with combustion dirt and debris.

Sustained operation of an appliance with a clogged filter may result in nuisance operational problems, bad combustion, and non-warrantable component failures.

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