Gas Pressure - Superior DRT2000 Series Installation And Operation Instructions For

Innovative Hearth Products
DRT2000 and DRC2000 Direct-Vent Fireplaces
BTU Input
Table 1 - Input Rate, Gas Valves
Table 2 - Thermal Effi ciency (%)
* AFUE is a measurement of the US Department of Energy, ** P4 (EnerGuide) is a measurement of the Canadian Offi ce of Energy Effi ciency.
NOTE: Effi ciencies are based on the most commonly used F1797 termination.

Gas Pressure

Table 3 - Inlet Gas Supply Pressure
Table 4 - Manifold Gas Supply Pressure
Test gauge connections are provided on the front of the millivolt and electronic gas control valve (identifi ed IN for the
inlet and OUT for the manifold side). The control valves have a 3/8" (10 mm) NPT thread inlet and outlet side of the
valve (Figures 1 and 2).
Figure 1 - Millivolt Gas Valve
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.
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).
Models
33" Models
35" Models
40" Models
45" Models
Model
AFUE *
33" Models
35" Models
40" Models
45" Models
Fuel
Natural Gas
Propane
Fuel
Natural Gas
Propane
Input Rate (BTU/HR)
Natural Gas
12,000
14,000
16,000
20,000
Millivolt
P4 **
64 60.4
65.5 61
65.5 62
65 63
Minimum
5" WC / (1.25 kPa)
11.0" WC / (2.74 kPa)
Figure 2 - Electronic Gas Valves
General Information
900004-00, 03/2017
Propane Gas
10,000
12,000
15,000
19,000
Electronic
AFUE * P4 **
64 64.8
65.5 65
65.5 65
65 66
Maximum
10.5" WC / (2.61 kPa)
13.0" WC / (3.23 kPa)
Pressure
3.5" WC / (0.87 kPa)
10.0" WC / (2.49 kPa)
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