Installation
900994-00K, 07/2021
Innovative Hearth Products
DRL2000 & DRL3500 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.
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.
Burner Model
Natural Gas - drill size *
Propane/LP Gas - drill size
DRL2035
#49 (0.073”), Cat. No. 21L82
CAT: J7385 #57 (.043”)
DRL2045
#47 (0.0785”), Cat. No. 99K74
CAT: 62L37 #56 (.046”)
DRL2055
#47 (0.0785”), Cat. No. 99K74
CAT: 19L52 #55 (.052”)
DRL3535
#43 (0.089”), Cat. No. 99K75
CAT: 62L37 #56 (.046”)
DRL3545
#43 (.089”) Cat No. 99K75
CAT: 19L52 #55 (.052”)
DRL3555
#40 (.098”) Cat No. 69L96
CAT: 39L10M #53 (.0595”)
* Standard size installed at factory
Table 5 - Burner Orifice Sizes, Elevation 0 - 4500 ft ( 0 - 1372 m)
NOTE:
Before accessing the test ports, the fireplace must be OFF and COLD. Turn OFF the main gas supply before
connecting to the pressure taps.
Propane tanks are at pressures that will cause damage to valve components. Verify that the tanks have step down regulators
to reduce the pressure to safe levels.
Using a propane tank smaller than 100 lbs may create pressure loss and insufficient fuel delivery, which can cause sooting,
severe delayed ignition, or other malfunctions (see NPFA 58).
Any damage as a result of insufficient tank size or other improper installation is NOT covered under the limited warranty.
f i r e - p a r t s . c o m
