Installation
900966-00B, 04/2019
Innovative Hearth Products
DRT3000-C Series Direct-Vent Gas Fireplaces
10
The appliance and its appliance main gas valve must be disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in excess of 1/2 psi (3.5 kPa).
The appliance must be isolated from the gas supply piping system by closing its equipment shutoff valve during
any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psi (3.5 kPa).
Orifice Sizes—Sea Level to High Altitude
These fireplaces are tested and approved for installation at elevations of 0 - 4500 ft (0 - 1372 m) above sea level
using the standard burner orifice sizes (Table 5). For elevations above 4500 ft, contact your gas supplier or qualified
service technician.
Table 5 - Burner Orifice Sizes, Elevation 0 - 4500 ft ( 0 - 1372 m)
Model
Natural Gas - drill size *
Propane - drill size *
35” Models
#45 (0.082”), Cat. No. 39L66
(0.048”), Cat. No. 99K78
40” Models
#43 (0.089”), Cat. No. 99K75
#54 (0.055”), Cat. No. 99K79
45” Models
#40 (0.098”), Cat. No. 69L96
#53 (0.0595”), Cat. No. 39L10
* Standard size installed at factory
Deration
At elevations above 4500 ft, the amount of BTU fuel value delivered must be reduced by either:
• Using gas that has been derated by the gas company.
• Changing the burner orifice to a smaller size as regulated by the local authorities having jurisdiction and by the
(USA) National Fuel Gas Code NFPA 54/ANSI Z223.1—latest edition or, in Canada, the CAN/CGA-B149.1 codes—
latest edition.
NOTE: Flame breadth, height and width will diminish 4% for every 1,000 ft of altitude.
IN CANADA—CAN/CGA-2.17-M91 (HIGH ALTITUDE):
THE CONVERSION SHALL BE CARRIED OUT BY A MANUFACTURER’S AUTHORIZED REPRESENTATIVE,
IN ACCORDANCE WITH THE REQUIREMENTS OF THE MANUFACTURER, PROVINCIAL OR TERRITORIAL
AUTHORITIES HAVING JURISDICTION AND IN ACCORDANCE WITH THE REQUIREMENTS OF THE CAN/
CGA-B149.1 OR CAN/CGA-B149.2 INSTALLATION CODES.
