Lochinvar GAS HEATER FOR COMMERICAL POOL APPLICATIONS service manual Vent Kits, Sidewall Venting

Installation and Service Manual

Figure 20 – Vertical DirectAire Installation with Rooftop Combustion Air Inlet

Vent Kits

￿WARNING: Only use a sidewall air inlet cap supplied by the appliance manufacturer or a rooftop air inlet cap supplied by the vent manufacturer. Using any other air inlet cap for single-unit installations or using a common air inlet cap for multiple units with insufficient free area and/or protections from wind and weather may result in operational problems and the spillage of flue products. Spillage of flue products can cause personal injury or death due to carbon monoxide poisoning.

For single pool heater installations with sidewall air inlet, (see Figure 18) you must order the sidewall air inlet kit. The part number for each SVK kit is listed by input size in TABLE–D.

For single pool heater installations with rooftop air inlet (see Figure 20), you must order the rooftop air inlet kit The part number for each VDK kit is listed by input size in TABLE-D. Purchase the flue pipe, rooftop flue termination, and air inlet pipe locally.

There is no vent kit for combined air supply systems for multiple pool heaters. Make sure the air inlet cap is properly sized. You must purchase this cap locally.

A barometric damper is not required in the flue on Vertical DirectAire™ installations if the draft is within the negative

0.04to 0.08 inches w.c. required for proper operation. If the draft exceeds this range, install a barometric damper.

TABLE-D	T–C
DirectAire™ Kits

Input Horizontal Vertical

Btu/hr Kit* Kit*

500,000 SVK3047 VDK3026

650,000 SVK3048 VDK3027

750,000 SVK3048 VDK3027

990,000 SVK3040 VDK3023

1,260,000 SVK3041 VDK3024

1,440,000 SVK3041 VDK3024

1,800,000 SVK3041 VDK3024

2,070,000 SVK3041 VDK3024

*The SVK kits include a DV box adapter and sidewall air inlet cap. The VDK kits include a DV box adapter and a rooftop air inlet cap. See note on page 12 concerning DV box adapter.

3. Sidewall Venting

IMPORTANT: Before installing a venting system, follow all venting clearances and requirements found in the Venting, General Information section, page 10.

This option uses a powered vent assembly which pulls the flue products out of the stack. This fan generates a negative draft at the pool heater. Combustion air is drawn from the mechanical room (see Combustion and Ventilation Air, page 7).

Venting of Flue Products

For venting flue products vertically to the outdoors, follow all requirements in the installation instructions for conventional venting in this manual. Follow all clearance requirements in Vertical Vent Termination Clearances and Location, page 10.

Figure 21 – Sidewall Venting Installation with an Induced Draft Fan and Sidewall Vent Cap

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