47
IR ELEMENT AND CATALYTIC CONVERTER
The IR Element and Catalytic Converter provide two
very different, but essential functions.
The IR Element provides the bottom browning -
similar to a residual broiler or salamander type
cooking appliance - required for cooking most food
items. The IR Element is independently controlled
via the IR Thermocouple embedded inside the IR
Element itself.
The Catalytic Conv
erter scrubs the air to eliminate
VOCs and grease particulates that are liberated during
the cooking process. It is important to properly care
for the Catalyst using only
TurboChef
®
Ov
en Cleaner
and distilled water. For more detailed information,
see the Catalytic Converter section below.
COMPONENTS
IR Element (100649)
The IR Element - a dual coil type heater - is located
in the bottom of the oven cavity. The first coil is the
heating coil. The second is the IR Thermocouple
(TIR) wire. The heating coil outputs 3000 watts at
208 VAC. The heating coil’s resistance is 14.4 Ohms
at room temperature.
The Thermocouple coil is a Type K Thermocouple
with a resistance of approximately 20 Ohms at the
splices located appr
o
ximately 6 inches fr
om the
heater and 40 Ohms measured at the extension
wir
es at the I/O Contr
ol Board.
The IR Element is controlled via the K5 Solid State
Relay (P/N 101284) and the IR Thermocouple via
the I/O Contr
ol Boar
d.
Catalytic Converter (NGC-1012)
The Catalytic Conv
er
ter
,
a VOC type catalyst, is
located behind the inside Cook Chamber Wall and
is responsible for cleaning the recirculating airflow.
The Catalyst functions by substantially lowering
the combustion temperature of grease entrained in
the air path to approximately the same temperature
of the airflow, thus the grease burns and breaks
down into CO
2
and H
2
O as it passes through the
Catalytic Converter. The Catalyst will operate most
efficiently at temperatures above 475
º
F.
The Catalyst material is very sensitive to certain
chemical compounds. Irreversible damage can occur
if the Catalyst is exposed to cleaning chemicals
containing phosphates, NaOH, silicates, Na and
Potassium Salts. These chemicals are found in most
commercially available degreasers and cleaners;
therefore, only TurboChef cleaners are to be used.
: Clean the Catalytic Converter
with TurboChef
®
Oven Cleaner and rinse
thoroughly with distilled water. Let the Catalytic
Converter air dry before reinstalling. If TurboChef
®
Oven Cleaner is not available, do not use a substi-
tute. Use distilled water only.
IR ELEMENT AND CATALYST REMOVAL
Refer to Figure 34 and the instructions below for
removing the IR Element and Catalytic Converter.
Removing the IR Element
1. Disconnect the Heater Wires going to the EMI
Filter and the High-Limit Thermostat.
2.
Locate wher
e the IR Element protrudes through
the Cook Chamber Walls and remove the Snap
Rings (Item 130) using Snap Ring Pliers. Retain
Snap Rings (Item 130) and Washers (Item 131).
F
igur
e 34.
3.
Locate and r
emo
v
e the M
icrowave Shield
(I
tem 133) b
y r
emoving the four (4) #8 x 1/2”
Sheet Metal Screws (Item 134).
4. Squeeze the IR Element together inside the
Cook Chamber and pull the IR Element from
the oven.
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