Orion System MODGAS-X - Manual (Page 3)

MODGAS-X Field Technical Guide
OVERVIEW
3
Overview
The OE377-26-00058 MODGAS-X Controller (AAON Part No.
V12090) is designed to modulate up to (2) gas valves to maintain
a desired Discharge Air Temperature. The MODGAS-X Controller
also controls the speed of the induced draft fan to maintain proper
combustion in the heat exchanger. See Figure 1 for dimensions.
The controller can be used as a stand-alone controller or communi-
cating with an AAON Unit Controller. The MODGAS-X controller
connects to an AAON unit controller or expansion module via a
modular cable. Depending on the type of unit controller, this con-
nection will utilize an I
2 C connection or an E-BUS connection. See
page 5 for wiring details.
The MODGAS-X Controller can be confi gured at the factory for
one (1) modulating valve, two (2) staged modulating valves, or one
(1) or two (2) modulating with multiple fi xed staged valves (stand-
alone operation only).
The MODGAS-X Controller can be confi gured at the factory for the
MAXITROL
® 0-20 volt valve(s) or the MAXITROL ® EXA STAR
0-10 volt stepper valve(s). See Appendix C, page 26 for depiction.
General Information
Figure 1: OE377-26-00058 MODGAS-X Controller Dimensions (In Inches)
When using the MODGAS-X Controller to replace an existing
MODGAS II Controller, see Appendix B, page 25 for details.
Features
The MODGAS-X Controller provides the following:
• Monitors Supply Air Temperature and Supply Air Reset
and modulates gas valve(s) to maintain Setpoint
• Provides proper control of the Induced Draft Fan
• Provides additional options for Stand-Alone control
• Contains a 2 x 8 LCD character display and 4 buttons
that allow for status display, setpoint changes, and
force modes
NOTE: The
MODGAS-X Controller contains no user-
serviceable parts. Contact qualifi ed technical
personnel if your
MODGAS-X Controller is not
operating correctly.
COMMON
VALV
E
GND
VOUT
GAS
CONTROLS
MADE IN USA
YS102378 REV 1
WATTMASTER
SERIAL
#
POWER
COMM
ALARM
STATUS
HEAT EN
RLY1
RLY2
RLY3
RLY4
AUX BIN
GND
RESET IN
SAT
AUX AIN
GND
GND
OPTIONS
1
2
R42 R39 J3
U1
D1
C18
D12
D14
R5
R19 R22 R26 R30
TB5
TB1 V1
R7
R2
C2
TB2
TB4
U210
D210
C21
1
C210
R210
R
R
R
C212
L210
R
.1uF
.01uF
1962
2803
1212
6042
1502
10
2 0
10
0
2
22
1
1
.47uF
22uF
3. 3u
F
22
1
1
22
1
1
22
1
1
5.73
2.62
2.04
4.09
0.57
0.21
5.04 5.63
5.24
1.68
1.20
0.25
Note: Overall Depth is 1.49 inches.