Vulcan RGT-10 Service Manual

INSTALLATION, SERVICE

PARTS MANUAL FOR

GAS CONVECTION OVEN

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MODEL: RGT-10

VULCAN-HART CORPORATION, 3600 NORTH POINT BOULEVARD, BALTIMORE, MARYLAND 21222

IMPORTANT

OPERATING, INSTALLATION AND SERVICE PERSONNEL

Operating information for this equipment has been prepared for use by qualified and/or authorized
operating personnel.

All installation and service on this equipment is to be performed by qualified, certified, licensed
and/or authorized installation or service personnel, with the exception of any marked with a + in
front of the part number.

Service may be obtained by contacting the Factory Service Department, Factory Representative or
Local Service Agency.

DEFINITIONS

QUALIFIED AND/OR AUTHORIZED OPERATING PERSONNEL

Qualified or authorized operating personnel are those who have carefully read the information in
this manual and are familiar with the equipment's functions or have had previous experience with
the operation of the equipment covered in this manual.

QUALIFIED INSTALLATION PERSONNEL

Qualified installation personnel are individuals, a firm, corporation or company which either in
person or through a representative are engaged in, and are responsible for:

1. The installation of gas piping from the outlet side of the gas meter, or the service regulator when
the meter is not provided, and the connection and installation of the gas appliance. Qualified
installation personnel must be experienced in such work, be familiar with all precautions
required, and have complied with all requirements of state or local authorities having
jurisdiction. Reference in the United States of America - National Fuel Gas code ANSI Z223.1
(Latest Edition). In Canada-Canadian Standard CAN1-B149.1 NAT. GAS (Latest Edition) or
CAN1-B149.2 PROPANE (Latest Edition).

2. The installation of electrical wiring from the electric meter, main control box or service outlet to
the electric appliance. Qualified installation personnel must be experienced in such work, be
familiar with all precautions required, and have complied with all requirements of state or local
authorities having jurisdiction. Reference: In the United States of America-National Electrical
Code ANSI NFPA No. 70 (Latest Edition). In Canada-Canadian Electrical Code Part 1 CSA­C22.1 (Latest Edition).

QUALIFIED SERVICE PERSONNEL

Qualified service personnel are those who are familiar with Vulcan equipment who have been
endorsed by the Vulcan-Hart Corporation. All authorized service personnel are required to be
equipped with a complete set of service parts manuals and stock a minimum amount of parts for
Vulcan equipment.

SHIPPING DAMAGE CLAIM PROCEDURE

For your protection, please note that equipment in this shipment was carefully inspected and
packed by skilled personnel before leaving the factory. The transportation company assumes full
responsibility for safe delivery upon acceptance of this shipment.

If shipment arrives damaged:

1. VISIBLE LOSS OR DAMAGE — Be certain this is noted on freight bill or express receipt

and signed by person making delivery.

2. FILE CLAIM FOR DAMAGES IMMEDIATELY — Regardless of extent of damage.

3. CONCEALED LOSS OR DAMAGE — If damage is unnoticed until merchandise is

unpacked, notify transportation company or carrier immediately, and file "concealed damage"
claim with them. This should be done within (15) days of date of delivery is made to you. Be
sure to retain container for inspection.

We cannot assume responsibility for damage or loss incurred in transit. We will, however, be
glad to furnish you with necessary documents to support your claim.

PLEASE RETAIN THIS MANUAL FOR FUTURE REFERENCE

IMPORTANT NOTES FOR ALL VULCAN APPLIANCES

1. These units are produced with the best possible workmanship and material. Proper installation is vital if best
performance and appearance are to be achieved. Installer must follow the installation instructions carefully.

2. Information on the construction and installation of ventilating hoods may be obtained from the "Standard for the
installation of equipment for the removal of smoke and grease laden vapors from commercial cooking equipment,"
NFPA No. 96 (latest edition) available from the National Fire Protection Association, Battery March Park, Quincy MA

02269.

3 For an appliance equipped with a flexible electric supply cord, the cord is equipped with a three prong (grounding)

plug. This grounding plug is for your protection against shock hazard and should be plugged directly into a properly
grounded three prong receptacle. Do not cut or remove the grounding prong from this plug. If the appliance is not
equipped with a grounding plug, and electric supply is needed, ground the appliance by using the ground lug
provided (refer to the wiring diagram).

(FOR GAS APPLIANCES ONLY)

4. Do not obstruct the air flow into and around the appliance. This air flow is necessary for proper combustion of gases
and for ventilation of the appliance. Provisions for ventilation of incoming air supply for the equipment in the room
must be in accordance with National Fuel Gas Code ANSI Z223.1 (latest edition).

5. Do not obstruct the flow of flue gases from the flue duct (when so equipped) located on the rear (or sides) of the
appliance. It is recommended that the flue gases be ventilated to the outside of the building through a ventilation
system installed by qualified personnel.

6. For an appliance equipped with casters, (1) the installation shall be made with a connector that complies with the
Standard for Connectors for Movable Gas Appliances, ANSI Z21.69 (latest edition), and Addenda, Z21.69a (latest
edition), and a quick-disconnect device that complies with the Standard for Quick-Disconnect Devices for Use With
Gas Fuel, ANSI Z21.41 (latest edition), and Addenda, Z21.41a (latest edition) and Z21.41b (latest edition), and (2)
adequate means must be provided to limit the movement of the appliance without depending on the connector and
the quick-disconnect device or its associated piping to limit the appliance movement. If disconnection of the restraint
is necessary, reconnect this restraint after the appliance has been returned to its originally installed position.

7. The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any
pressure testing of that system at test pressures in excess of ½ psig (3.45 k Pa).

8. The appliance must be isolated from the gas supply system by closing its individual manual shutoff valve during any
pressure testing of the gas supply system at test pressures equal to or less than ½ psig (3.45 k Pa).

CAUTIONS

FOR YOUR SAFETY

DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN
THE VICINITY OF THIS EQUIPMENT OR ANY OTHER APPLIANCE.

1. KEEP THE APPLIANCE FREE AND CLEAR FROM ALL COMBUSTIBLE
SUBSTANCES.

2. IN THE EVENT A GAS ODOR IS DETECTED, SHUT UNIT(S) DOWN AT THE MAIN
SHUTOFF VALVE AND CONTACT THE LOCAL GAS COMPANY OR GAS SUPPLIER
FOR SERVICE.

3. POST IN A PROMINENT LOCATION, INSTRUCTIONS TO BE FOLLOWED IN THE

EVENT THE SMELL OF GAS IS DETECTED. THIS INFORMATION MAY BE OBTAINED
FROM A LOCAL GAS SUPPLIER.

VULCAN RGT-10 GAS CONVECTION OVEN
INSTALLATION, SERVICE & PARTS MANUAL – INDEX

Your Vulcan RGT-10 Gas Convention Oven is the finest
made. Proper use and maintenance will result in many
years of satisfactory performance.

DESCRIPTION PAGE

DEFINITIONS (Inside Front Cover)
CAUTIONS 1
INDEX 2

SECTION I (INSTALLATION)

INSTALLATION INSTRUCTIONS 3-4

SECTION II (SERVICING)

GENERAL THEORY OF OPERATION 5
PARTS REPLACEMENT 6-10
TROUBLE SHOOTING 10-11
COOKING CHART 12-13

SECTION III PARTS

PARTS LIST 14-24

REVISION PAGE (Inside Back Cover)

RGT-10 units are supplied with a 7 foot 3 wire supply
cord. Appliances are equipped with a three prong
(grounded) plug for your protection against shock hazard
and should be plugged directly into a properly grounded
three prong receptacle. DO NOT cut or remove the
grounding prong from this plug.

For installation on combustible floors with minimum
clearances from combustible construction, 0 in. at the
sides and 6 in. at the rear.

We suggest that you carefully read this entire manual and
carefully follow all of the instructions.

A rating plate is located on the lower panel stating the
model number, type gas, serial number, voltage and
amperage.

A wiring decal is also located on the lower front panel.
Motor blowers in the RGT-10 units are permanently

lubricated and require no additional lubricating main­tenance.

2

INSTALLATION INSTRUCTIONS (SECTION I)

Vulcan RGT-10 Gas Convection Ovens are manufac­tured for use with the type of gas specified on the
nameplate and for installation in accordance with
ANSZ223.1 (Latest Edition) National Fuel Gas Code.
Copies may be obtained from American Gas Association
Inc., 1515 Wilson Blvd., Arlington, Virginia 22209.
Vulcan ovens are produced with the best possible
workmanship and materials. Proper installation is vital if
best performance and appearance is to be achieved.
Please follow these instructions carefully.

1. Remove crating with care. Remove all wood
blocking, packing material and accessories.

2. Each unit is factory equipped and electrically

connected for use with type of gas and electric
supply indicated on rating plate behind the lower
panel. Check type of gas and electric supply
available.

3. Oven and leg stand are shipped assembled on
Model RGT-10 only. Position unit as near to final
location as possible.

4. Pipe joint compounds used when connecting ap­pliances to gas should be resistant to the action of
LP. Gases.

5. Pipe joints should be tested for leaks with a soap
and water solution before operating the unit.

6. Connect oven to gas supply through shut-off
valve and gas pressure regulator provided.

Units for use on natural gas are equipped with a
regulator with a preset outlet pressure of 3.7" W.C.
Units for use on propane gas have a regulator with a
preset outlet pressure of 10.0" W.C. Regulator must
be mounted horizontally to provide the preset outlet
pressure. If regulator is mounted in any other
position, the outlet pressure must be reset.

(NOTE: Do not obstruct leak limiter on gas pressure
regulator.)

7. Connect oven to electric supply. 115 volt ovens

single phase units are equipped with a 7 ft. 3 wire
including ground supply cord. 208/240 volt units
with single or three phase motors are provided with
terminal block.

8. Install draft diverter or low profile deflector. Either a
draft diverter or low profile deflector is shipped with
every oven. Low profile deflector is intended for
use when oven is installed under canopy type
hoods. When oven is directly connected to vent
system, down draft diverter must be used.

9. Install oven rack supports. Insert hooks (3) into slots
provided in side linings. When mobile carriers or
basket dollies are to be used, the standard oven racks
and supports are left out.

A. The cart used to transport mobile carriers and

basket dollies has a guide and locking device to
align runners on cart with runners on oven deck.

B. When using 18 x 26 pans with single rack carrier,

the racks are not required. Engage 18 x 26 pan
rim on rack carrier runners. The oven deck height
should now be adjusted to align with cart height.

10. Using a carpenter level placed on a rack, adjust the
feet on the bottom of each leg, so that oven is level
from front to back and side to side. This must be done
with either standard rack supports or optional extra
mobile carriers when used.

(NOTE: Level oven when in permanent position only.)

11. Turn on gas. Purge gas line to remove air. Check for
leaks.

CAUTION: Use soap solution or similar means (do

not check with open flame).

OPERATING INSTRUCTIONS RGT-10

1. If pilot light is out, turn thermostat off, open doors, then
wait 5 minutes before relighting.

2. Light pilot with taper.

3. Turn master switch to "on" position.

4. Set thermostat control knob to desired temperature.
(Set cooking chart for reference.)

5. Set load control to proper setting (Set cooking chart for
reference.)

6. For daily shutdown, turn master switch, thermostat
knob, and load control knob to "off" position.

7. For seasonal shutdown, extinguish pilot, turn master
switch, thermostat knob, and load control knob to "off"
position.

The pilot burner flames are preset at the factory before
shipping approximately 1/2" high. Flame should impinge
on flame switch sensing bulb located directly above each
pilot burner. It is not necessary to light the pilots every
day. At the end of each day's use, turn off master switch.
(See Detail B)

3

INSTALLATION INSTRUCTIONS (Cont.)

CAUTION

Fan must rotate clockwise when viewed through the oven
door. On three phase motor units, fan rotation can be
reversed by interchanging any two power supply leads.
On single phase units with incorrect fan rotation, contact
factory.

The ideal method of ventilating a Convection oven is the
use of a properly designed hood. Hood should extend
about 6" beyond all sides of the appliance. The hood
should be connected to an adequate exhaust duct or
system.

When ovens are installed in locations having low ceilings,
care must be taken to insure proper clearance for the flue
products. Lack of this clearance above outlet of rear flue
piping will interfere with heat circulation in the oven and
could create a fire hazard condition.

Do not permit fans to blow directly at the oven and
wherever possible, avoid open windows adjacent to oven
sides or back and wall type fans which create air cross
currents within the room.

It is also necessary that sufficient room air inlet be
allowed to compensate for the amount of air removed by
any ventilating system. Otherwise, a subnormal
atmosphere pressure will occur, affecting oven operation
adversely and causing undesirable working conditions.

A properly designed and installed hood will act as the
heart of the ventilating system for the room or area in
which the oven is installed, and will leave the oven
independent of changing draft conditions.

DETAIL B

FLUE CONNECTIONS

Good ventilation, which includes flue connections and
room drafts, is just as important for correct oven operation
as adequate gas supply.

Generally speaking, ovens should never be directly flue
connected, if a direct flue system can be avoided.

4

GENERAL THEORY OF OPERATION (SECTION II)

Figure 1 shows the air flow pattern inside the Vulcan-Hart
Convection Oven. The blower pulls the air from inside the
oven cavity and forces it around toward the left and right
sides. The forced air is then deflected toward the front of
the oven on both sides and finally returns to the inner
section through the perforated side liners on both sides.
The air is thus able to carry the heat from the heat
exchangers located behind the side liner and distribute it
evenly throughout the oven cavity.

The Blower and Solenoid operate independently of each
other. The Blower operates as long as the doors are
closed or the Aux. Fan Switch is actuated. The Solenoid is
controlled by the Thermostat and the Load Control. The
Thermostat must be On and the Load Control set to an
operating position for the Solenoid to come On and supply
heat to the oven. Either the Thermostat or the Load
Control switch in OFF position will shut off the Solenoid.

In order to provide protection against pilot-out hazard, two
normally open flame switches are connected in series with
the Solenoid. The switches close when heated by the
pilots and will remain closed as long as the pilot is
present. In the absence of pilot heat, the switches open,
thereby de-energizing the solenoid valves. A snap-action
door switch, mechanically linked with the right hand door,
shuts off both the heat and the blower when the door is
opened and will automatically reset when the door is
closed.

In ovens equipped with optional Aux. Fan Switch, the
above mentioned door interlock can be over-ridden by
depressing the "Aux. Fan" push button switch. The over­ride affects the blower only (not the heat) and is intended
for rapid cooling of the oven interior. Under "Component
Description and Replacement" section in the Operating
Manual the detailed function of each component is
explained.

5

PARTS REPLACEMENT

WARNING: Turn the Main Gas Valve and Power Disconnect

Switch to OFF before servicing the equipment. Reconnect the
leads of the replacing components exactly to the original position
and reverse procedure for adding the new component.

1. SWITCH PANEL

Remove two screws from rear flange of Switch Panel
louvered cover. Push cover back exposing Switch Panel
components.

A. REPLACING OF MASTER SWITCH, LIGHTED PUSH

BUTTON SWITCHES AND INDICATOR LIGHTS.
? Remove all wire connections to component. Make a

note of terminal positions.

? Compress spring clips on top and bottom of component

while forcing it out the front of the Switch Panel.

? Replace component in the original position by pushing

through the front face of the Switch Panel until spring clips
lock into place.

? Reconnect wires to proper terminals.

B. REPLACEMENT OF THERMOSTAT.

? Remove Rear Body Top.
? Remove the Thermostat Bulb from its (2) retaining clips

located in the right rear corner of oven cavity.
?Push Bulb and Capillary Tube through Grom-met in

cavity top.

? Push Bulb and Capillary through hole in Switch
Panel Compartment.

? Remove Silicone tubing from Capillary and save

for reinstallation.

? Disconnect wires from Thermostat. Remove

control knobs and mounting screws. Pull Ther
mostat off back of panel.

? When reinstalling Thermostat, reverse procedure

listed above. Do not kink Capillary or cause sharp
bend in Bulb.

THERMOSTAT CALIBRATION CHECK

? Use a calibrated potentiometer with a thermo-

couple located in the center of the fan guard

assembly.
? Set Thermostat Knob to a mid range temperature.
? Allow adequate time for the temperature to

stabilize.

THERMOSTAT CALIBRATION
? Remove knob from dial shaft B, Detail B.
? Turn screw A clockwise to decrease temperature

and counterclockwise to increase temperature.

NOTE: ¼ turn of screw A represents a tem-

perature shift of 35 degrees F.

6