Venting EC0C977 Direct Vent Water Heater Instruction Manual
- June 15, 2024
- Venting
Table of Contents
Venting EC0C977 Direct Vent Water Heater
Horizontal Vent Considerations
WARNING:
Moisture in the flue gas will condense as it leaves the vent terminal. In cold
weather this condensate can freeze on the exterior wall, under the eaves, and
on surrounding objects. Some discoloration to the exterior of the building is
to be expected. However, improper location or installation can result in
severe damage to the structure or exterior finish of the building.
- DO NOT locate vent terminal on the side of a building with prevailing winter winds. This will help prevent water lines from freezing and moisture from freezing on walls and under eaves.
- DO NOT locate vent terminal too close to shrubbery, since flue gases may damage them.
- All painted surfaces should be primed to lessen the chance of physical damage. Painted surfaces will require maintenance.
- Guard against accidental contact with people and pets.
Indoor Tankless Water Heaters
WARNING:
For multiple-unit installation, a minimum distance between vent terminations
must be maintained to prevent recirculation of vent gases. Maintain a
horizontal center-to-center distance between vent terminations of 19 in. (48
cm) for two-unit installation, or 21 in. (53 cm) for installation of three or
more units*.
- DO NOT terminate vent directly on brick or masonry surfaces. A rust-resistant, sheetmetal backing plate is recommended behind the vent.
- Caulk all cracks, seams, and joints within 6 ft. (1.8 m) of the vent terminal.
- Caulk around wall faceplate for weather-tight seal.
- DO NOT extend exposed vent pipe of indoor water heaters outside of the building.
- This water heater requires its own separate venting system. DO NOT connect the exhaust vent to an existing vent pipe or chimney.
Outdoor Tankless Water Heaters
Install outdoor water heater such that air inlet and flue outlet are above anticipated snow level.