XLT Ovens XLT Gas Oven, Parts & Service Manual, Page: 14 / 72

14 OVEN THEORY OF OPERATION
SSR 1-4 - A Solid State Relay is an electronic switching device in which a small control signal
from the OMC a larger load current and voltage. It comprises a voltage sensor which responds to
the TC, a solid state switching device which switches power to the Heating Elements (Hl-6) either
on or off, and does this without mechanical parts.
TIC - The thermocouple is a type K. It consists of two different conductors that produce a voltage
proportional to a temperature difference between either end of the pair of conductors. The TIC is
connected to P8 Terminals I & 2 on the OMC. The millivolt signal is used to display the actual
temperature.
-4R
-lR
f��
�'f�
�1i;'\"iJ
,
� - �
'iltc"i'!!
· tii: r, j
"j)'.' ,'l
�,,
�- iJ
J � � .,
1) TSl- Terminal Strip
IL) Neutral In
2L) Ll In
-lOR
3L) Not Used
-lR
4L) S2 Signal Out
IR) Neutral Out
2R) Ll Out
3R) Not Used
4R) S2 Signal In
2) TS2- Terminal Strip
IL) Power SRC
2L) Not Used
3L) +24 VDC In
4L) Not Used
SL) Power M3(+)
6L) Power S2 24 VDC
7L) SRC
8L) -24 VDC
9L) COM To VFD
l OL) Ground To VFD
IR) Not Used
2R) Power To OMC2
3R) 24 VDC Power To OMCl
4R) Not Used
5R) Power M3 (+)
6R) Power To Relay COM
7R) Cooldown Switch
8R) M3 (-)
9R) -24 VDC
l 0R) Ground
TS 1 & 2- These are terminal strips, that serve as a connection point for wires.
VFD -The Variable Frequency Drive converts 50 Hz power into 60 Hz power so the ovens fan can
run at the proper RPM' s. The VFD converts the AC supply voltage to DC and then converts the
DC to a suitable three-phase frequency source for Ml. The VFD is turned on via the OMC P 11
terminal #1. A complete manual can be found at www.x l tovens.com .
Technical Support US: 888-443-2751
S i mple . Smart.
1) Incoming Power
1) Neutral
2) Line Volta ge
3) Not Used
4) Ground
2) Not Used-VFD Relay
3) Digital Inputs
1) Stop Function
2) Sta rt / Run
3) Not Used
4) COM To TS2
5) Not Used
6) Not Used
4) Exha ust Fan Power
1) Power To Motor
2) Power To Motor
3) Power To Motor
4) Not Used
5) Not Used
5) ModBus Comm
Technical Support INTL: 316-943-2751