AAON MODGAS-X, Техническое руководство

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10
MODGAS-X Technical Guide
WIRING
Single Modulating Valve and up to 14 Stages of Fixed Heat Stand-Alone
One Modulating Valve with up to 14
Additional Stages of Fixed Heat Stand-
Alone Wiring
This configuration only applies to a Stand-Alone Mode (Figure
4, this page) and can be factory-configured.
If using a MHGRV-X Module along with the MODGAS-X
Module in Stand-Alone Mode, the SAT Sensor always connects
to the MODGAS-X.
The first two fixed stages use AUX1 (RLY3) and AUX2 (RLY4)
relays to enable them ( Figure 4, this page ). Additional fixed
stages can be added by using the 12 Relay E-BUS Expansion
Module. ( Figure 5, page 11 ).
This configuration can use either the MAXITROL
®
0-20 volt
valve(s) or the MAXITROL
®
EXA STAR 0-10 volt stepper
valve(s) (configured at the factory). See Appendix C, page 36
for depiction.
WARNING:
Do not connect power to VOUT/Ground
terminal block.
If communication is lost to the 12 Relay E-BUS Expansion
Module, the 12 Relay E-BUS Expansion Module will turn off
its relays and the MODGAS-X will alarm and fall back to using
only its onboard stages. If communications is restored, the
MODGAS-X will begin staging up if needed.
Fan Enable And
Stage 1 Heat (Mod)
Low Speed Fan
See for jumper settings.
Only one Supply Air Temperature Sensor
can be used per application.
SAT OPTIONS Table
24 VAC power input terminals
maximum power consumption
One Gas Valve = 18 VA
Note:
1. 24 VAC must be connected so
that all ground wires remain common.
2. All wiring to be in accordance with
local and national electrical codes
and specifications.
Connect SAT and GND Input to
Reheat board’s SAT Input if
applicable.
0-10 VDC
External Reset
Signal
-
+
Heat Enable
Signal (24 VAC)
W1
Supply Air
Temperature
Sensor
Mount in unit
supply air duct.
GV1
CR1
H1
CR2
MODGAS-X
AAON P/N: ASM01668
LABEL P/N:
G041210
E-BUS
CONNECT
I2C
CONNECT
+24
V
A
C
GND
CONTACT RATING
@ 24 VAC
IS 1 AMP MAX
VOUT
GND
GAS VALVE
TERMINALS
COMM
RELAY OUTPUT
TERMINALS
INPUT TERMINALS (TYPE)
HEAT EN (BI)
AUX. (BI)
GND
RESET IN (AI)
SAT IN (AI)
GND (AI)
GND
AUX. (AI)
AUX 1
LOW SPEED
FAN
AUX 2
H2
Stage 2 Heat (Fixed)
H3
Stage 3 Heat (Fixed)
40 VA
transformer
minimum
18-30 VAC
GND
Line
E-BUS cable connects to
12 Relay E-BUS expansion port
YS102378 REV 1
Figure 4: Single Modulating Valve - Stand-Alone Wiring