Wiring Diagrams - Advantage Controls MegaTron Installation, Maintenance And Repair Manual

Pre-Wired
Pre-wired units are supplied with a 16 AWG cable(s) with 3-wire grounded USA 115 volt plug for incoming
power and 3-wire grounded receptacle cords for all control relay outputs also 16 AWG.
NOTE: An additional male power cord is supplied with each group of 5 relays. All incoming power
cords must be plugged in for the unit to work correctly.
Conduit
Conduit units are predrilled at the factory and supplied with conduit knockouts for easy hard wiring to supplied
detachable connectors on the relay card(s) located in the lower section of the controller. Remove the six
screws of the lower panel for access.
NOTES:
Do not drill holes in upper section of enclosure.
1.
2. Relay 1, 6, 11 or 16 (if supplied) only provide a normally open (N.O.) relay output on
relay cards marked Rev B. Revision C of the the relay card has both a (N.O. and
N.C.) If a N.O. and N.C. are required on a Rev. B card, use one of the other relays and
program that relay to be controlled by the desired control function. See page 24.
3. The control function that activates each relay output is pre-configured at the factory
based on the options selected. To change relay activation see on page 24.
4. See page 30 for common bleed / blowdown valve wiring.
5. Refer to label inside lower panel cover for specific relay board configuration supplied.
6. Relays configured as "dry contact" should only have D.C. voltage ran through them.
Relay Card Wiring
NET
GRD
N.O.
N.C.
FUSE
NET
GRD
N.O.
N.C.
FUSE
NET
GRD
N.O.
N.C.
FUSE
H N G
Jumpers above relay can change it
to a dry contact relay. Use GRD and
N.O. for a N.O. dry contact relay.
POWER INPUT
If a whole card is configured for dry contact relays output each relay will be like the top one as shown on the
Rev. C card.
*
Relays 6-20 only on
multi-system controllers
Ribbon Cable
2
1
Relay Card Rev. D
Dry contact
115volt relay
See note below
NET
GRD
N.O.
N.C.
FUSE
NET
GRD
N.O.
N.C.
FUSE
10
9
*
Relays 6-20 only on multi-system controllers
5
Powered relay Dry contact