General Information
900994-00K, 07/2021
Innovative Hearth Products
DRL2000 & DRL3500 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/LP
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/LP
10.0” WC / (2.49 kPa)
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
(
Figures 1 & 1A
).
Based on CSA P.4.1-2015
* 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.
NOTE:
**CPI disabled per addendum instructions
900949-00 (provided with this appliance).
Table 1 - Input Rate (BTU/HR), Gas Valves
Burner Model
Natural Gas
Propane/LP Gas
(Field Converted)
High Rate
Low Rate
High Rate
Low Rate
DRL2035
15,000
13,000
14,000
12,000
DRL2045
18,000
14,000
16,000
13,000
DRL3535
18,000
12,000
16,000
13,000
DRL3545
23,000
16,000
21,000
17,000
DRL2055
23,000
19,000
21,000
17,000
DRL3555
28,000
19,000
27,000
21,000
Table 2 - Thermal Efficiency (%)
Figure 1 - Electronic Gas Valve PF2
Figure 1A - Electronic Gas Valve PF1
Inlet 3/8” NPT
Outlet 3/8”
NPT
Outlet
Pressure
Tap
Pilot Outlet
7/16” UNS
Inlet
Pressure
Tap
Orange Wire
(from DFC Wire
Harness)
Pressure
Regulator
Tower
Main Gas Inlet
3/8" NPT
Green Wire
(from DFC Wire Harness)
Inlet (IN) Test Port
Manifold (OUT)
Test Port
Connect GTMS
wire harness
Yellow Ground Wire
(from DFC Wire
Harness)
Side View
Burner Model
Electronic
Electronic
AFUE *
P4
AFUE *
P4
Natural
Natural
Propane/LP Propane/LP
DRL2035
68.9
63.64
53.7
62.8**
DRL2045
70.7
67.11
56.6
64.5
DRL3535
69.2
65.11
55.3
63.1**
DRL3545
66.9
62.4
61.9
65
DRL2055
69.4
62.7
64.8
64.4
DRL3555
67.7
62.4
61
63.4
NOTE: *Propane/ LP models are available through
Field conversion only
f i r e - p a r t s . c o m
