Reznor RDH User Manual
Form CP-PREEVA-GC (Version A)
Obsoletes Form CP-PREEVA-GC
Gas Conversion Kit Instructions
Applies to: PREEVA
with 1-Stage Gas Control Option AG1 or with 2-Stage
Gas Control Options AG2, AG3, AG15, and AG16
®
Models PDH, SDH, and RDH
General and
Warnings
HAZARD INTENSITY
LEVELS of Warnings
in this Manual
All gas conversion must be done by a qualied service person in compliance with the
National Fuel Gas Code NFPA 54 / ANSI Z223.1 (latest edition), these instructions,
and other applicable codes and requirements.
In Canada, gas conversion shall be carried out in accordance with the requirements of
the Provincial Authorities having jurisdiction and in accordance with the requirements
of the CAN/CSA-B149.1 (latest edition), Natural and Propane Gas Installation Code.
1. DANGER: Failure to comply will result in severe personal injury or death
and/or property damage.
2. WARNING: Failure to comply could result in severe personal injury or
death and/or property damage.
3. CAUTION: Failure to comply could result in minor personal injury and/or
property damage.
WARNING
Improper installation, adjustment, alteration, service,
or maintenance can cause property damage, injury, or
death. Read the installation, operation and maintenance
instructions thoroughly before installing or servicing this
equipment.
FOR YOUR SAFETY
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in
your building.
• Leave the building immediately.
• Immediately call your gas supplier from a phone remote
from the building. Follow the gas supplier’s instructions.
• Ifyoucannotreachyourgassupplier,callthere
department.
— Installationandservicemustbeperformedbyaqualied
installer, service agency, or the gas supplier.
Donotstoreorusegasolineorotherammablevaporsandliquidsin
the vicinity of this or any other appliance.
WARNING
The conversion kit is to be selected and installed by a qualied service person
in accordance with these instructions and in compliance with all codes and
requirements of authorities having jurisdiction. Failure to follow instructions
couldresultindeath,seriousinjuryand/orpropertydamage.Thequaliedagency
performing this work assumes responsibility for this conversion.
Form CP-PREEVA-GC, P/N 212063 R7, Page 1
General and Warnings (cont’d)
DANGER
The gas burner in this gas-red equipment is designed to provide safe, complete combustion.
However, if the installation does not permit the burner to receive the proper supply of combustion
air, complete combustion may not occur. The result is incomplete combustion which produces
carbon monoxide, a poisonous gas that can cause death.
Safeoperationofindirect-redgasburningequipmentrequiresaproperlyoperatingventsystem
whichvents allueproductstotheoutsideatmosphere. FAILURE TO PROVIDE PROPER VENT-
ING WILL RESULT IN A HEALTH HAZARD WHICH COULD CAUSE SERIOUS PERSONAL INJURY
OR DEATH.
On separated combustion Model SDH heaters, install either the horizontal or vertical combustion
air/vent system illustrated in the heater venting manual, using the concentric adapter supplied.
For all heater installations, always comply with the combustion air requirements in the installation
codes and instructions. Model PDH units installed in a conned space must be supplied with
air for combustion as required by Code and in the heater installation manual. Combustion air at
the burner should be regulated only by manufacturer-provided equipment. NEVER RESTRICT OR
OTHERWISE ALTER THE SUPPLY OF COMBUSTION AIR TO ANY HEATER. MAINTAIN THE VENT
OR VENT/COMBUSTION AIR SYSTEM IN STRUCTURALLY SOUND AND PROPER OPERATING
CONDITION.
Application and Kit
Selection
Gas Conversion
Instructions
The gas conversion kits in these instructions are for Model PDH, Model SDH, and
Model RDH PREEVA® Series packaged heaters equipped with gas control Option AG1,
AG2, AG3, AG15, or AG16. Conversion kits include one or two spring kits for a singlestage valve and one for a two-stage valve. All conversion kits include burner orices
for multiple sizes. See page 7 for conversion kit P/N’s, application, and components.
NOTE: These kits DO NOT APPLY to units with Control Option AG40, AG60, AG61,
AG62, DG1, DG2, DG5, DG6, D12B, D12C, D12F, or D12G). If converting a unit with
any of these control options, contact the factory.
1. Check kit contents for agreement with the parts list and the size of heater being
serviced. (See the parts lists and application for each kit on page 7.)
Conversion of a unit using these kits will not alter the input rate. Refer to the rating
plate on the heater for input rate and other appropriate information.
(NOTE: If adjusted for high altitude operation, input rate will be affected; for high
altitude input ratings and capacities refer to TABLE 3A or 3B, page 8.)
2. Turn off the gas supply at a shutoff valve outside of the heater and turn off
the electrical supply. Open the burner section door.
3. Select and Install the Regulator Spring Kit (valve manufacturer’s conversion
kit)
All conversion kits include one or two regulator spring kits for a single-stage
valve and one for a two-stage valve. Check the package carefully and choose
the regulator spring kit that corresponds with the valve on the heater. NOTE: The
other regulator spring kits will not be used.
Regulator spring kits are not interchangeable. Each spring kit
must be used only in the model and type of valve for which the kit
is designated. Verify compatibility before installing the spring kit.
To install the spring regulator conversion kit, follow the valve manufacturer’s
installation instructions that are included with the spring kit. After a new regulator
spring kit is installed, it is necessary to adjust the spring for the correct manifold
pressure. This adjustment can only be made after the heater is in operation;
instructions are included in Step No. 6.
Form CP-PREEVA-GC, P/N 212063 R7, Page 2
WARNING
FIGURE 1 - Burner and
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.
Low Voltage Electrical
Section
(Depending on size,
controls may appear
differently, but conversion
instructions are the
same.)
4.SelectandInstallBurnerOrice
WARNING
TABLE 1 - Burner
OriceP/N’sand
Markings
BurnerOrice-PREEVA® Models PDH, SDH, and RDH
Size 75 100 125 150 175 200 225 250 300 350 400A
Natural
Gas
Propane
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
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
FIGURE 2A -
1) Location of the
BurnerOriceonall
Models & Sizes
2) Location of the Air
Restrictor Plate on
SIZES 75, 100, 125, 150,
and 175 when installed
for use with Propane
Donotattempttodrillorice.Usefactory-suppliedoriceonly.
4A. Selectorice.
Because each kit is designed to convert more than one size of heater, there are
two or three burner orices per kit. From TABLE 1 below, nd the marking that
appears on the orice for the heater being converted. Select the orice from the
kit that has the marking required for the size of heater. The other orice(s) will
not be used in this conversion.
4B.LocatetheOriceonall Sizes AND the Air Restrictor Plate on Sizes 75, 100,
125, 150, and 175
Refer to FIGURES 2A and 2B.
BurnerOrice(NOTE:Before
installingtheneworice,verify
the marking with the size listed in
TABLE 1, page 3.)
Venturi
Tube
Gas Flow from
Gas Valve
(Tabs are
not bent;
see below.)
Air Restrictor Plate ONLY FOR PROPANE Applies to Sizes 75, 100, 125, 150, and 175
when using propane only.
Form CP-PREEVA-GC, P/N 212063 R7, Page 3
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