131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00684-200 Rev. A 071301
www.Intellitecsve.com
Intellitec
INSTALLATION & SERVICE MANUAL
TM
50 AMP Smart Energy Management System Model 900
The 12 VDC voltage connections are made through J2, a 3 pin Mate-N-Lok connector on the low voltage side of the
control module. The +12 volts should be supplied from a source fused at 3 Amps minimum and capable of delivering
up to 1 Amp of AVERAGE current. Protecting this connection with a higher rated fuse is acceptable since the EMS is
internally protected with a 3 Amp fuse. The connections are as follows:
J2 Pin Function
1 + 12 Volts
2 Gen Set Run Input
3 Ground
The low voltage controlled load connections are made through J4, a 6 pin Mate-N-Lok connector on the low voltage side of
the control module. The connections are as follows:
J4 Pin Function
1 Relay 5 Normally Open
2 Relay 5 Common
3 Relay 5 Normally Closed
4 Relay 6 Common
5 Relay 6 Normally Closed
6 Relay 6 Normally Open
The low voltage controlled load relay connections are typically made to the thermostat wires of the air conditioners. The
normally open contacts are wired in "series" with the thermostat. This means that the thermostat wire is cut and the two
ends are wired to the Common and the Normally Open contacts of the relay/s. In this way, the EMS can interrupt the
operation of the compressor just as the thermostat does. The low voltage wires are brought into the box through the large
hole in the lower right-hand corner of the back of the box.
There are several methods to utilize Relay 5 and 6 connections for controlling air conditioner systems with the
EMS:
1) If only the compressors of the front and rear A/C's are to be controlled, connections are typically made to the low voltage
compressor control wires of the air conditioners. The normally closed contacts are wired in "series" with the compressor
control lead. This means that the compressor control wire is cut and the two ends are wired to the Common and the
Normally Closed contacts of Relay 5 or 6. In this way, the EMS can interrupt the operation of the compressor, just as the
thermostat does.
2) If both the compressors and fans of the front and rear A/C's are to be controlled, connections are typically made to the
low voltage thermostat control wires of the air conditioners. The normally closed contacts are wired in "series" with each
thermostat control lead. This means that the thermostat control wire is cut and the two ends are wired to the Common and
the Normally Closed contacts of Relay 5 or 6. In this way, the EMS can interrupt the operation of the compressor and fans,
just as the thermostat does.
3) If the compressor and fan for one of the A/C systems are to be controlled individually, connections are typically made to
the individual low voltage thermostat control wires for the fan and compressor of the air conditioner. The Relay 6
connections are typically made to the low voltage compressor control wires of the air conditioner to control the
compressor. The normally closed contacts are wired in "series" with the compressor control lead. This means that the low
voltage compressor control wire is cut and the two ends are wired to the Common and the Normally Closed contacts on
Relay 6. The Relay 5 connections are typically made to the low voltage thermostat control wires of the air conditioner to
control the fan. The normally closed contacts are wired in "series" with the thermostat control lead. This means that the
low voltage thermostat control wire is cut and the two ends are wired to the Common and the Normally Closed contacts on
Relay 5. In this way, the EMS can interrupt the operation of the fan, just as the thermostat does.
Finally, on the Control Module, there is a small 2 pin plug labeled J1 which is only used for the High Pot Test on the system.
When the two pins are shorted together, the EMS will operate without the presence of 120 VAC.
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