Regency U38-NG, U38-LP installation manual Draft Hood, High Elevation

INSTALLATION

DRAFT HOOD VENTING

Vent Terminations

This heater has a draft hood built in. It must not be altered, obstructed, or blocked in any way, and the unit must be installed so that the draft hood is in the same atmospheric pressure zone as the combustion air inlet to the burner. This heater must be properly connected to a venting system. This heater is equipped with a vent safety shutoff system.

WARNING: Operation of this heater when not connected to a properly installed and maintained venting system or tampering with the vent safety shutoff system can result in carbon monoxide (CO) poison- ing and possible death.

HIGH ELEVATION

The U38 (with 40,000 BTU rating) is approved in Canada for altitude 2000 ft. to 4500 ft. (CAN/ CGA-2.17-M91) with the orifice kit (Part # 591- 975). For Natural Gas installations above 4500 ft. follow current CAN/CGA-B149.1.

In U.S.A., for installations above 2000 ft. refer to current ANSI Z223.1 Sc8-8.1.2a appendix F, for resizing orifice.

This heater is a vented appliance and must be connected to a chimney/flue in accordance with the installation codes.

Note: The rear pedestal cover plate is only required when outside air is being used. If using room air for combustion, remove this plate from the back of the pedestal.

For your safety this heater is equipped with a vent safety switch designed to sense incor- rect venting and react by shutting down the gas supply. This thermally actuated switch is located within the draft hood and will detect either a blocked chimney or backdraft condi- tion where the chimney flow has reversed. If this switch shuts the unit down, it indicates a drafting problem that must be identified and rectified without delay - the thermally activated switch must never be bypassed or discon- nected as a hazardous or deadly condition can result.

Venting Requirements

A four inch diameter vent is required. B-Vent, Class A or Masonry with an approved liner are all acceptable. For cosmetic or aesthetic pur- poses 6" outer vent can be used as long as an approved inner vent is installed. Fasten but do not penetrate the inner sleeve of the B-Vent when tightening the screw.

Follow all venting manufacturer’s requirements and local building codes. In cold climates, we recommend the use of insulated B-vent, chase, and liners. For altitudes above 2000 ft. we recommend that a minimum flue height of 12 ft. is used.

Flue Mounting Bracket

Attach the flue mounting bracket with the enclosed screw as shown in the diagram.

Installation into Existing

Woodstove Flue System

1)Clean existing Chimney system.

2)Run an approved 4" flex liner or "B" vent into existing chimney.

Note: See the chimney systems manufacturer for detailed installation instructions.

Regency U38 ULTIMATE Freestanding Gas Heater 7