Orion System MODGAS-X - Manual (Page 12)

WIRING
MODGAS-X Field Technical Guide 12
Two Modulating Staged Valves - Communicating Wiring
Two Modulating Staged Valves -
Communicating Wiring
This confi guration operates as Stand-Alone (Figure 8, page 11) or
communicating with an AAON Unit Controller (Figure 9, below).
For connection to a VCB-X Controller or VCB-X Expansion Module,
use an E-BUS Cable connecting to the appropriate E-BUS ports on
those controllers.
For all other controllers, including VAV/CAV, MUA, VCM, VCM-
X, SA, and RNE Controllers, use an I
2 C Cable connecting to the
appropriate I 2 C ports on those controllers.
If using the VCM-X Controller (I 2 C), extra fi xed stages can be added
by using the VCM-X Expansion Module.
This configuration can use either the MAXITROL ® 0-20 volt
valve(s) or the MAXITROL ® EXA STAR 0-10 volt stepper valve(s)
(confi gured at the factory). See Appendix C, page 26 for depiction.
WARNING: Do Not Connect Power To VOUT/Ground
Terminal Block!
Figure 9: Two Modulating Staged Valves Communicating Wiring Diagram
MODGAS-X CONTROLLER
(OE377-26-00058)
Supply
Air Temperature
Sensor
Mount In Supply
Air Duct
EBC E-BUS Cable
Connects To
VCB-X Controller’s
Expansion
Port
Low Speed Fan
24 VAC Power
Input Terminals
Max. Power
Consumption
1 Gas Valve
= 18 VA
2 Gas Valves
= 33 VA
Stage 2 Heat (Mod)
I C Cable
Connects To
VCM-X Controller’s
Expansion
Port
2
Fan Enable and
Stage 1 Heat (Mod)
The SAT OPTIONS Jumper Setting
Should Be Set to 1.
See For Settings.
Only One Supply Air Temperature Sensor
Can Be Used Per Application.
Table 9, Page 24
Connect
o AI2 & GND
On Main Controller
(This Does Not Apply To
Retrofit Applications.
See .)
Supply Air Temperature
Sensor T
Table 7, Page 24