Warning – Reznor RDH with 1-stage gas control or 2-stage gas control Gas Conversion Kit Instructions User Manual
Page 3
Form CP-PREEVA-GC, P/N 212063 R7, Page 3
FIGURE 1 - Burner and
Low Voltage Electrical
Section
(Depending on size,
controls may appear
differently, but conversion
instructions are the
same.)
Pressure Switch
If installation is above 6000 ft (1830M),
pressure switch may need to
be changed. Follow high altitude
instructions on page 4.
Control Side
Electrical Compartments
Burner with Venturi Tube (See FIGURE 2A)
Gas Valve
Follow manufacturer's
instructions to install
regulator spring kit.
4. Select and Install Burner Orifice
WARNING
Do not attempt to drill orifice. Use factory-supplied orifice only.
4A. Select orifice.
Because each kit is designed to convert more than one size of heater, there are
two or three burner orifices per kit. From
TABLE 1 below, find the marking that
appears on the orifice for the heater being converted. Select the orifice from the
kit that has the marking required for the size of heater. The other orifice(s) will
not be used in this conversion.
TABLE 1 - Burner
Orifice P/N’s and
Markings
Burner Orifice - PREEVA
®
Models PDH, SDH, and RDH
Size
75
100
125
150
175
200
225
250
300
350
400A
Natural
Gas
P/N 196855 205430 211851 131581 196891 196892 221121 208255 221122 221123 196897
Marking
#19
#11
#3
5.9MM
E
6.8MM 6.95MM
L
8.0MM 8.7MM 9.6MM
Propane
P/N 196852 205720 196838 196898 196899 196900 196901 196902 196903 196904 196905
Marking
#39
2.9MM
#30
9/64"
#24
4.1MM 11/64"
#14
#8
#3
5.8MM
4B. Locate the Orifice on all Sizes AND the Air Restrictor Plate on Sizes 75, 100,
125, 150, and 175
Refer to FIGURES 2A and 2B.
FIGURE 2A -
1) Location of the
Burner Orifice on all
Models & Sizes
2) Location of the Air
Restrictor Plate on
SIZES 75, 100, 125, 150,
and 175 when installed
for use with Propane
Burner Orifice (NOTE: Before
installing the new orifice, verify
the marking with the size listed in
TABLE 1, page 3.)
Gas Flow from
Gas Valve
Venturi
Tube
Air Restrictor Plate ONLY FOR PROPANE -
Applies to Sizes 75, 100, 125, 150, and 175
when using propane only.
(Tabs are
not bent;
see below.)