Thermo King EON Power Pack Installation guide

Brand: Thermo King

Model: EON Power Pack

Type: Installation guide

Kit 401233

Item Part Number Description Qty. Item Part Number Description Qty.

1. 411259 Fuse, 25 amp 1 6. 203729 Battery 1

2. 411770 Holder, fuse 1 7. 929130 Cover, box 1

3. 452229 Disconnect, low voltage 1 8. 927310 Bracket, battery hold down 1

4. 448680 Filter, power 1 9. 418076 Holder, fuse 40 amp 1

5. 410893 Relay, mini 1 10. 419361 Fuse, 40 amp 1

Figure 1. 401233 EON Battery Power Pack Components

RCS2043

Installation Instructions

EON Power Pack

Installation Best Practices

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ttiimmee::

• A 65 amp or greater alternator

• Lamp switch with 45 minute timer and integrated brake switch interrupt, p/n 20703132

• LED trailer lights

IImmppoorrttaanntt IInnssttaallllaattiioonn PPrreeccaauuttiioonnss

• Do not connect this to Precedent battery charger system. Connect to trailer refrigeration unit

(TRU) alternator or stand alone accessory alternator.

• Electrical wiring should be installed and routed in such a way as to allow for vibration and

movement. TTHHEEYY SSHHOOUULLDD NNEEVVEERR BBEE SSTTRREETTCCHHEEDD TTIIGGHHTT!!

• Always keep electrical wiring from rubbing or chafing against sharp metal objects, rotating

components or hot objects.

• All electrical wiring should be neatly routed and secured with band wraps or clamps.

• Do not route electrical wires, harness or battery cables together with fuel lines.

• Liftgate charging/ auxiliary power cables must be run separately from other wires except

liftgate motor sense wire

Installation Procedures

1. Disconnect negative battery cable from TRU before installing EON Power Pack.

2. Use an AGM battery charger so EON battery will be fully charged.

3. Install 65 amp alternator on TRU if required (See the EON Power Pack Notes on page 3).

4. Mount EON Power Pack near TRU. Use supplied hardware to secure:

a. mounting bracket into 2 walls studs.

b. EON Power Pack onto mounting bracket.

Figure 2. Mounting Bracket Hole Spacing Shown

RCS2044

12”

14”

16.5”

8.96”

5. Connect wires and cables as shown on page 3, secure with clamps and band wraps.

6. Install battery into EON Power Pack with provided brackets, and observe battery polarity

when connecting positive and negative cables. BBaatttteerryy llaayyss oonn iittss ssiiddee..

7. Reconnect TRU battery and check system:

a. TRU OFF - EON Power Pack should be disconnected from TRU alternator.

b. When TRU is started, the EON Power Pack should not begin charging until TRU has

finished cranking and is up to speed.

EEOONN PPoowweerr PPaacckk NNootteess::

Upgrading to a 65 amp or greater alternator is recommended. Make sure to also upgrade the

wire gauge if changing from a 37 amp to 65 amp alternator in the field. Replace the 2 wire

running from the alternator to the control board and then to the reefer unit battery.

NNoottee:: Remove the 35 amp fuse and holder if it exists.

Circuit Functions

NNoottee:: The EON Power Pack charging circuit contains a power filter and an additional relay

because the D+ terminal on this alternator goes to +12 volts as soon as the TRU switch is

turned on. This would allow the EON Power Pack charging circuit to be energized while the

TRU is cranking and possibly overload the charging circuit. The only alternator current

output that waits until the engine is up to speed is AC current from the W terminal (AC tap

on competitor TRU’s). The power filter rectifies the AC output and the relay acts as a pilot

relay because the current output from the W terminal is limited.

UUnniitt NNoott RRuunnnniinngg -- LLiigghhttss OOnn

If TRU is not running there is no output from the W terminal on the alternator. Without power

the pilot relay cannot energize the relay to connect the EON battery to the alternator. When the

lighting system is on the TRU battery is isolated and will not be discharged.

UUnniitt RRuunnnniinngg -- LLiigghhttss OOnn oorr OOffff

When TRU unit is started, AC current is taken from the W terminal on the alternator and run

through the power filter. The AC current is rectified to DC and sent to the relay. The relay

activates and sends current from the B+ terminal on the alternator through the #2 relay, through

the 40 amp fuse and charges the EON battery.

STARTER + (SEE INSTRUCTIONS)

TRU OPTIONAL

RCS2045

FUSE

25 AMP

12 Volt power to lights

or use recommended

Control Switch

207-3132

FUS_LIT

BAT_POS

BAT_DIS

BAT_REL

BATTERY

(-) (+)

RLY_GND

BAT_DIS

1 2

87A

RELAY

BLK POWER

FILTER

RED

BAT_NEG

BOX_NEG

FUSE

40 AMP

Fuse is under

heat shrink and

cover do not trim

this end of cable

UNIT GROUND

TYPICAL

B+

LOW

VOLTAGE

DISCONNECT

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TTyyppiiccaall:: Connect to B+ terminal on alternator to allow charging when TRU is on.

OOppttiioonnaall:: Connect to TRU positive terminal on starter to force the TRU to continue to run until

the EON battery is charged.

CCaauuttiioonn:: Optional wiring cannot be used if you have a Precedent unit with a battery charger.

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Thermo King EON Power Pack Installation guide

Thermo King EON Power Pack Installation guide

Thermo King EON Power Pack Installation guide

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