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

Innovative Hearth Products
DRT4000-C & DRT4200-C Series Direct-Vent Gas Fireplaces
BTU Input
Table 1 - Input Rate (BTU/HR), Gas Valves
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 Line Gas Pressures
Table 4 - Manifold Outlet Gas Supply Pressure
Test gauge connections are provided on the front of the 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 1A & 1B).
Figure 1A - Electronic Gas Valve PF2 (DRT4200-C)
(from DFC Wire Harness)
Manifold (OUT)
Inlet (IN) Test Port
Orange Wire
(from DFC Wire
Harness)
Main Gas Inlet
3/8" NPT
Models
DRT4040-C
DRT4240-C
DRT4045-C
DRT4245-C
Model
Natural Gas
DRT4040-C 57.8
DRT4240-C 61.1
DRT4045-C 57.6
DRT4245-C 65.9
Fuel
Natural Gas
Propane
Fuel
Natural Gas
Propane
Green Wire
Test Port
Side View
Natural Gas
High Rate Low Rate
28,000 20,000
36,000 24,000
31,000 21,000
42,000 25,000
AFUE *
Propane Gas Natural Gas
54.9 57.1
61.6 62.4
59.5 59.6
61.1 62.7
Minimum
5" WC (1.25 kPa)
11.0" WC (2.74 kPa)
Figure 1B - Electronic Gas Valve PF1 (DRT4000-C)
Connect GTMS
wire harness
Outlet
Pressure
Tap
Pressure
Regulator
Tower
Yellow Ground Wire
(from DFC Wire
Harness)
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.
General Information
901032-00B, 07/2020
Propane Gas
High Rate
25,000
31,000
31,000
41,000
P4 **
Propane Gas
58.6
62.9
62.8
Based on CSA P.4.1-2015
62.4
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)
Inlet 3/8" NPT
Inlet
Pressure
Tap
Low Rate
18,000
21,000
20,000
22,000
Outlet 3/8"
NPT
Pilot Outlet
7/16" UNS
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