1485 Jacobs Rd.
Deland, FL 32724
386.738.7307
P/N 53-00803-400 Rev. C 041519
www.intellitec.com
Intellitec
SERVICE MANUAL
50 AMP TRANSFER RELAY DELAY
-
DUAL INPUT GENSET
HOW IT WORKS
The 50 Amp Transfer Relay is used to transfer the power source of a coach between the shore power and the
generator. Power from the shore power cord is fed to the normally closed contacts of two contactors. This
allows the power from both lines of the shore cord to pass through into the coach distribution panel.
Power from the generator is fed to the normally open contacts and to a delay circuit on the printed circuit board.
When the power from the generator is applied, the delay circuit senses the power from Line 1 and applies DC
power to the contactor coils, after approximately 15 seconds. This pulls in the two contactors, applying the
power from the generator to the coach.
The unit can also be wired to act as a transfer between both lines of a 5.5 KW or 6.5 KW generator and a 30 Amp
shore power cord.
There are no dealer serviceable parts in this box.
Replacement of a defective box is the only way to correct a failed unit.
Typical connections for 50 Amp service are shown in Figure 3.
The connection diagram for this unit is shown in Figure 4.
SERVICING
CAUTION
To gain access to the connections:
Remove the two hex head screws at either side of the
row of connectors. Pull the cover forward and lifting up, remove the cover to expose the interior of the
unit.
Remove the cover to gain access to the connections.
Make a diagram of the all the connections before removing any wires.
, unscrew the six cable clamp screws releasing the cables,
loosen the set screws of the 12
connectors along the field wiring side of the terminal blocks, in order. This will allow the cables to be
removed. (Unscrew the four mounting screws and remove the unit from the coach.)
BEFORE ATTEMPTING TO REMOVE THE COVER, BE SURE THE POWER FROM BOTH THE
SHORE CORD AND GENERATOR ARE OFF.
All servicing within this box should be done only by a qualified Service Technician.
REMOVAL AND REPLACEMENT
IMPORTANT:
IMPORTANT!
During installation, wire per the wiring diagram and instructions printed on the box cover.
The field wiring screws must be tightened to 35 in-lbs to insure a tight connection.
First
then
2
