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Innovative Hearth Products
DRT63ST-B Power-Vent Direct-Vent Fireplaces
Misc. Codes/Standards
Installation must conform to local codes or, in
the absence of local codes, with the National
Fuel Gas Code, ANSI Z223.1/NFPA 54 - latest
edition (in Canada, the current CAN/CGA-B149.1
installation code).
The appliance, when installed, must be electri-
cally grounded and wired in accordance with
local codes or, in the absence of local codes,
with the National Electrical Code, ANSI/NFPA
70 - latest edition, or the Canadian Electrical
Code, CSA C22.1 - latest edition.
Provide adequate clearances around air open-
ings and adequate accessibility clearance for
service and proper operation. Never obstruct
the front or back openings of the appliance.
These appliances are designed to operate
on natural gas only. The use of other fuels or
combination of fuels will degrade the perfor-
mance of this system and may be dangerous.
The system is switchable between standing
and intermittent pilot modes. External electrical
power is required to operate these units.
These models come standard with a remotely
modulated gas valve. The included transmitter
remotely controls flame appearance and heat
output (manual gas valve adjustment is not
possible).
Inputs and Efficiencies
Appliance BTU inputs are listed in Table 1A.
Appliance efficiencies are listed in Table 1B.
INPUTS
Gas Type
Natural Gas
57,000 to 37,000 BTU/hr
Table 1A
EFFICIENCIES
Gas Type
Natural Gas
Table 1B
Gas Supply Pressure Requirements
Inlet and manifold gas supply pressure require-
ments for these appliances are listed in Tables
2 and 3.
Green Wire (From DFC
Manifold (Out)
Line (In) Test Port
Orange Wire
(from DFC Wire
Harness)
Inlet
3/8" NPT
Figure 1 - SIT Proflame Valve
6
Inlet Gas Supply Pressure (all models)
Fuel #
Natural
Gas
Table 2
Manifold Gas Supply Pressure (all models)
Fuel #
Natural
Gas
Table 3
Gas Supply Pressure Requirements
(continued from previous page)
Test gauge connections are provided on the
front of the electronic gas control valve (identi-
fied 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. Refer
to Figure 1.
These appliances must not be connected to a
chimney or flue serving a separate solid fuel
burning appliance.
The appliance and its appliance main gas
valve must be disconnected from the gas
supply piping system during any pres-
sure testing of that system at test pres-
sures in excess of 1/2 psi (3.5 kPa).
The appliance must be isolated from the
gas supply piping system by closing its
Inputs
equipment shutoff valve during any pres-
sure testing of the gas supply piping
system at test pressures equal to or less
than 1/2 psi (3.5 kPa).
AFUE
EnerGuide
PURGE CYCLE - This is a power-vented
%
%
fireplace that requires household
electrical power to operate. When the
fireplace is turned OFF, the exhaust
blower will continue to operate for up
to two minutes, to purge exhaust gases
from the venting system. This system
will not operate during a power outage.
Wire Harness)
Test Port
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Minimum
Maximum
5.0" WC
10.5" WC
(1.24 kPa)
(2.61 kPa)
Low
High
(Lo) 1.6" WC
(Hi) 3.5" WC
(0.4 kPa)
(0.87 kPa)
Connect GTMS
Wire Harness
Pressure
Regulator
Tower
Outlet
3/8" NPT
Yellow Ground Wire
(From DFC Wire
Harness)
General Information
901140-00, 01/2021
Orifice Sizes
Sea Level To High Altitude (All Models)
These appliances are tested and approved
for installation at elevations of 0–4500 feet
(0–1372 meters) above sea level using the
standard burner orifice sizes listed in Table 4 ).
For elevations above 4500 feet, contact your
gas supplier or qualified service technician.
Deration
At higher elevations, the amount of BTU fuel
value delivered must be reduced by either:
• using gas that has been derated by the gas
company; or
• changing the burner orifice to a smaller size
as regulated by the local authorities having
jurisdiction and by the (USA) National Fuel
Gas Code NFPA 54/ANSI Z223.1 - latest
edition or, in Canada, the CAN/CGA-B149.1
codes - latest edition.
Install the appliance according to the regulations
of the local authorities having jurisdiction and,
in the USA, the National Fuel Gas Code NFPA
54 / ANSI Z223.1 - latest edition or , in Canada,
the CAN/CGA-B149.1- latest edition.
NOTE: Flame appearance will diminish
4% per 1,000 feet.
Gas Valve Diagram
The SIT Proflame valve is illustrated in Figure 1.
Burner Orifice Sizes
(USA and Canada)
Elevation 0-4500 ft (0–1372 m)
Natural Gas
#25 (0.150")
Drill size (inches)
[Cat. No. F4700]
Table 4
Standard size installed at factory.
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