Lochinvar GAS HEATER FOR COMMERICAL POOL APPLICATIONS service manual Masonry Chimney Installation

Installation and Service Manual

Figure 22A – Direct Vent (Illustration with Sidewall Vent and Sidewall Combustion Air)

Figure 22B – Sidewall Venting

￿WARNING: Do not combine the flue from this unit with the vent from any other appliance. Do not combine flues from multiple appliances into a common vent. The flue from this unit must be a dedicated stack.

Connect the flue vent directly to the flue outlet opening on the top of the pool heater. Make the connections from the pool heater vent to the outside stack as direct as possible with no reduction in diameter. Provide adequate clearance to combustibles for the vent connector and firestop. Follow the vent manufacturer’s instructions when installing sealed AL29- 4C vents and accessories, such as firestop spacers, vent connectors, thimbles, caps, etc.

Provide adequate clearance to combustibles for the vent connector and firestop.

When planning the venting system, avoid possible contact with plumbing or electrical wiring inside walls, ceilings, and floors. Locate the pool heater as close as possible to the chimney or gas vent. When a vent system is disconnected for any reason, the flue must be reassembled and resealed according to the vent manufacturer’s instructions.

The installed length of flue from the pool heater to the outside point of termination must not exceed 50 equivalent feet (15.2m). Subtract 5 feet (1.5m) of equivalent length for each 90° elbow. Subtract 2.5 feet (0.7m) of equivalent length for each 45° elbow.

Masonry Chimney Installation

Do not use a standard masonry chimney to directly vent the combustion products from this pool heater.

To use a masonry chimney, the chimney must use a sealed, corrosion-resistant liner system. Sealed, corrosion-resistant liner systems (singlewall, doublewall, flexible, or rigid) must be rated for use with a high efficiency, positive pressure vent system.

Corrosion-resistant chimney liner systems are typically made from a high grade stainless steel such as AL29-4C. The liner must be properly sized and fully sealed throughout the entire length. Both the top and bottom of the masonry chimney must be capped and sealed to provide a dead air space around the liner.

￿WARNING: Do not vent this pool heater into a masonry chimney without a sealed stainless steel liner system. Any breaks, leaks, or damage to the masonry flue/tile will allow the positive- pressure flue products to leak from the chimney and into occupied living spaces. This could cause serious injury or death due to carbon monoxide poisoning and other harmful flue products.

IMPORTANT: Check with local code officials to determine code requirements or the advisability of using a masonry chimney with a sealed corrosion-resistant liner system.

Sidewall Vent Termination Clearances and Location Follow all sidewall venting termination information for clearances and location under Sidewall Vent Termination Clearances and Location, page 11.

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