General Information
900948-00E, 07/2020
Innovative Hearth Products
DRT2000-C Series Direct-Vent Gas Fireplaces
9
BTU Input
Gas Pressure
Table 3 - Inlet Line Gas Pressures
Fuel
Minimum
Maximum
Natural Gas
5” WC / (1.25 kPa)
10.5” WC / (2.61 kPa)
Propane
11.0” WC / (2.74 kPa)
13.0” WC / (3.23 kPa)
Table 4 - Manifold Outlet Gas Supply Pressure
Fuel
Pressure
Natural Gas
3.5” WC / (0.87 kPa)
Propane
10.0” WC / (2.49 kPa)
* AFUE is a measurement of the US Department of Energy,
** Complies with CSA P.4.1-2015 “Testing Method for Measuring Annual Fireplace
Efficiency. P4 (EnerGuide) is a measurement of the Canadian Office of Energy Efficiency.
Efficiencies are based on Normal input operation.
HI
LO W
TPTH
TP
TH
PILO
T
PIL
OT
ON
it
OFF
Variable Flame Height Adjustment
Manifold Pressure Port
Inlet Pressure Port
Main Gas
Control Knob
IN
OUT
SIT Millivolt Gas Valve
Test gauge connections are provided on the front of the millivolt gas control valve (identified 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
(
Figure 1
).
Figure 1A - Millivolt Gas Valve
Figure 1B - Electronic 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).
SIT - Millivolt
Table 1 - Input Rate (BTU/HR), Gas Valves
Models
Natural Gas
Propane Gas
High Rate
Low Rate
High Rate
Low Rate
35” Models
17,000
13,000
17,000
13,000
40” Models
20,000
16,000
18,500
14,000
45” Models
22,000
18,000
21,000
16,000
Table 2 - Thermal Efficiency (%)
Model
Millivolt & Electronic
AFUE *
P4 **
Natural
Propane
Natural
Propane
35” Models
68.2
67.9
64.6
67.8
40” Models
70.3
71.5
62.4
62.4
45” Models
71.9
71.8
62.7
63.6
Based on CSA P.4.1-2015
Inlet 3/8” NPT
Outlet 3/8”
NPT
Outlet Pressure
Tap
Pilot Outlet
7/16” UNS
Inlet Pressure
Tap
