General Information
900697-01 01/2017
Innovative Hearth Products
DRT4000 Series Direct-Vent Gas Fireplaces
9
BTU Input
Table 1 - Input Rate (BTU/HR), Gas Valves
Models
Natural Gas
Propane Gas
High Rate
Low Rate
High Rate
Low Rate
40” Models
28,000
20,000
25,000
18,000
45” Models
31,000
21,000
31,000
20,000
† 12,000 in Ecoflow Models
Table 2 - Thermal Efficiency (%)
Model
Millivolt
Electronic
P4 *
P4 *
40” Models
49
52
45” Models
50
56
* P4 (EnerGuide) is a measurement of the Canadian Office of Energy Efficiency. Efficiencies are based on Normal input operation.
Gas Pressure
Table 3 - Inlet Gas Supply Pressure
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 Gas Supply Pressure
Fuel
Pressure
Natural Gas
3.5” WC (0.87 kPa)
Propane
10.0” WC (2.49 kPa)
Test gauge connections are provided on the front of the millivolt and electronic 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
(
Figures 1
and
2
)
.
Figure 1 - Millivolt Gas Valve
Figure 2 - 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).
Ecoflow Electronic Gas Valve
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
SIT Millivolt Gas Valve
