Gas Pressure - Superior Fireplaces DRT4000 Series Installation And Operation Instructions Manual

Innovative Hearth Products
DRT4000 Series Direct-Vent Gas Fireplaces
BTU Input
Table 1 - Input Rate (BTU/HR), Gas Valves
† 12,000 in Ecoflow Models
Table 2 - Thermal Efficiency (%)
* 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.

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 control valve (See Figure 1 - identified IN for the inlet
and OUT for the manifold side). The outlet manifold test gauge connection is provided on the valve stem of the electronic
gas valve (see Figure 2A). The inlet line gas pressure test point for the electronic gas valve is shown in Figure 2B. The
control valves have a 3/8" (10 mm) NPT thread inlet and outlet side of the valve.
Figure 1 - Millivolt Gas Valve
SIT
Figure 2B - Ecoflow INLET Line Gas Pressure Test Point
APPLIANCES WITH ECOFLOW VALVE
Testing Inlet line Gas Pressure (Qualified Technicians
Only):
1. Turn off gas shutoff valve and electrical.
2. Remove 1/8" plug (shown in diagram to the right).
3. Install an 1/8" nipple in place of plug.
4. Connect manometer to nipple, using an 1/8" NPT air
hose nipple/fitting.
5. Turn on shutoff valve and check for proper inlet gas
pressure.
6. Reverse steps 1-5.
Models
40" Models
45" Models
Millivolt
Model
40" Models
45" Models
Fuel
Natural Gas
Propane
Fuel
Natural Gas
Propane
Pilot Adjustment
Main Gas Control Knob
OFF/PILOT/ON
IN OUT
Manifold Pressure Tap
HI/LO Variable
Flame Height
Inlet Pressure Tap
Adjustment
Natural Gas
High Rate Low Rate
28,000 20,000
31,000 21,000
Electronic
P4 * P4 *
49 52
50 56
Minimum
5" WC (1.25 kPa)
11.0" WC (2.74 kPa)
Pressure
3.5" WC (0.87 kPa)
10.0" WC (2.49 kPa)
Figure 2A
Figure 2 - Electronic Gas Valve
Screw
Outlet Pressure
Test Point
Ecoflow
Some parts have been removed for clarity
1/8" Inlet line gas pressure 'test point' plug (in control compartment)
General Information
900697-01 11/2017
Propane Gas
High Rate Low Rate
25,000 18,000
31,000 20,000
Based on CSA P.4.1-2015
Maximum
10.5" WC (2.61 kPa)
13.0" WC (3.23 kPa)
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