WFCO WF-9800-AD Series User manual

OPERATOR’S MANUAL
WF-9800-AD SERIES
DECKMOUNT COUNVERTER-CHARGER
ARTERRA DISTRIBUTION
[phone]
wfcoelectronics.com
WARRANTY
[email protected]
Fax [phone]
Distributed by Arterra in the U.S.A. and Canada

2
SAFETY INFORMATION ..................................................................................................... 3
GENERAL INFORMATION
Reverse Battery Protection ................................................................................................... 3
Automatic Cooling Fan ....................................................................................................... 4
Over-Temperature Protection .............................................................................................. 4
Electronic Current Limiting ................................................................................................... 4
Short Circuit Protection ........................................................................................................ 4
DC Fuses ................................................................................................................................ 4
OPERATIONAL FEATURES
Auto Detect ........................................................................................................................... 5
Three Stage Smart Charging ................................................................................................ 5
Two Stage Smart Charging ................................................................................................... 6
Converter Modes of Operation ............................................................................................ 6
TROUBLESHOOTING INSTRUCTIONS
Converter Output Voltage .................................................................................................... 8
Reverse Polarity Fuses ........................................................................................................... 9
Troubleshooting Flow Chart ................................................................................................. 9
GENERAL COMPLIANCE INFORMATION
Agency Listings ...................................................................................................................... 9
INSTALLATION INSTRUCTIONS
Mounting the Enclosure....................................................................................................... 10
DC Connections ................................................................................................................... 10
AC Connections ................................................................................................................... 11
SPECIFICATIONS ................................................................................................................. 13
WARRANTY INFORMATION.............................................................................................. 14
TABLE OF CONTENTS

3
REVERSE BATTERY HOOKUP PROTECTION
The WF-9800-AD Series Converter-Chargers will charge the 12-volt house battery if installed.
A battery does not have to be installed for WF-9800-AD Series Converter-Chargers operation.
When a battery is installed, two reverse polarity fuses are installed to protect the converter
circuitry. The fuses are located on the rear panel of the enclosure near the AC power cord (refer
to Figure 1 on the next page). This feature prevents permanent damage to the converter from a
battery connected into the circuit backwards. In addition to protecting the converter-charger, the
reverse polarity fuses are the main connection between the converter-charger and the DC fuse
board of a distribution center.
SAFETY AND PROTECTION FEATURES
WF-9800-AD Series Converter-Charger Safety Features

4
Automatic Cooling Fan
The cooling fan in the WF-9800-AD Series Converter-Chargers is controlled by the current
(Amperage) load attached to the converter, NOT by temperature. The on-board microprocessor
increases fan speed as the total load increases and decreases fan speed as the load decreases.
Unlike traditional temperature-controlled fans, the load-controlled fan provides better
component cooling by avoiding temperature spikes which can lead to premature
component failure.
OVER-TEMPERATURE PROTECTION
If the internal temperature of the converter exceeds a critical point, it will shut down. This protects
the unit from excessive heat that may damage sensitive components. The unit will restart once
the temperature inside has dropped.
ELECTRONIC CURRENT LIMITING
In the event that the output current exceeds the maximum rating for the WF-9800-AD Series
Converter-Charger, the output current will remain constant, but the output voltage will begin to
drop. If this occurs, the unit will recover once loads are reduced.
SHORT-CIRCUIT PROTECTION
Should a short circuit occur in the RV, the WF-9800-AD Series Converter-Charger will drop the
voltage output to zero volts. If the short-circuit condition is removed and no other fault conditions
are detected, the converter will resume normal operation. However, short- circuit conditions are
dangerous, and an RV will require inspection by a qualied service technician.
DC FUSES (12 VOLTS)
The DC fuse receptacle on the rear panel of the WF-9800-AD Series Converter-Charger has space
for 1 (one) or 2 (two) Reverse Battery Protection fuses (see Figure 1 above). These fuses should be
replaced with ATC or ATO automotive type fuses, such as Littelfuse type 257 or Bussmann type
ATC. Each converter model requires a different Amperage value fuse as follows:
WF-9835-AD - (1) 40A
WF-9845-AD - (2) 30A
WF-9855-AD - (2) 35A
WF-9865-AD - (2) 40A
WF-9875-AD - (2) 40A
Figure 1

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AUTO-DETECT
This product includes the exclusive “Auto-detect” feature for the charging of batteries. With this new
technology, the power converter will evaluate the charging cycle of a battery, determine the type of
battery being used, and then choose the appropriate charging program (prole) to provide for the
best performance and maintenance of that battery.
Because of the differences of Lead Acid, AGM and Lithium type batteries, a system that provides a
charge to the battery or batteries must be able to accommodate the different charging requirements.
With the use of the “Auto-detect” product, the charging requirement is able to be “detected” and is
then automatically set for the type of battery being used. For standard Lead Acid and AGM batteries,
WFCO power converters still use the Three-Stage Smart Charging to effectively maximize battery life
by monitoring through the different phases of the charge cycle. On the other hand, Lithium batteries
will prefer the use of only two stages when charging, and therefore the power converter will charge
using the WFCO Two-Stage Smart Charging system.
LEAD ACID & AGM BATTERY THREE-STAGE SMART CHARGING
In order to maximize battery life for lead acid and AGM batteries, it is best to charge batteries slowly,
keep them topped off with a trickle-charge when the RV is not being used. The 3-Stage “smart”
charger continuously measures the battery voltage output and regulates the amount of charge using
three modes of operation; Absorption, Bulk and Float modes.
All WFCO power converters have automatic three-stage switching power supplies. The converter
senses which mode it needs to be in by checking the RV system voltage.
ABSORPTION MODE
The converter normally provides a constant target output voltage of 13.6 VDC (nominal) to power all
the branch circuits. However, it is current limited, and if the output (load) current reaches its maximum,
the output voltage will drop as necessary to hold the converter’s maximum output current level (the
Amperage rating) without exceeding it.
BULK MODE
If the output current reaches its maximum (normally caused by a discharged battery), this will cause the
converter to go into Bulk Mode, which means the target output voltage will change to 14.4 VDC and
a timer will start. Although the converter is outputting 14.4 VDC, you will not be able to read that on a
voltmeter due to the voltage-current relationship. From the paragraph above, as load current
increases, output voltage decreases. The actual output voltage will not rise until the load current is
reduced, which happens naturally as the battery charges or if 12 VDC appliances are turned off. Bulk
Mode will be maintained until the current draw drops to approximately ve Amps, or until the timer
reaches four hours (whichever happens rst). Then the target output voltage is changed back to 13.6
VDC for Absorption Mode. Lights that are powered from the output may change brightness slightly at
that time.
OPERATIONAL FEATURES

6
LITHIUM BATTERY TWO-STAGE SMART CHARGING
The two-stage “smart” charger continuously measures the battery voltage output and
regulates the amount of charge using two modes of operation: Bulk and Absorption mode.
CONVERTER MODES OF OPERATION
Understanding output voltages of a two-stage converter.
Figure 2
Figure 3
FLOAT MODE
The third mode of charging is what is called the “oat” charge. This mode is designed to pro-
vide a “trickle charge” to the battery after the system observes no signicant variations in current
draw over a long period of time. When in “oat” mode, the voltage will reduce from 13.6V to
13.2V and supply the “trickle charge” which helps to preserve the life of the battery while keeping
it charged and ready for use. A change in DC current will cause the converter to exit the mode
and return to the Absorption mode and then to Bulk mode if required.
Note: For a detailed explanation of the charging modes, please refer to our publication “Theory of
Operation”, document #AD-TD-0001-0.

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BULK MODE
This mode is designed with 2 purposes in mind. First, to quickly restore the energy back into
the battery. Second, to ensure the lithium cells inside the battery remain balanced. This is
accomplished by boosting the output voltage to 14.6 VDC and allowing the maximum current
to ow as required by the loads.
The bulk mode stage could last anywhere from 1 to 4 hours based on the battery and load
current which is being used. For a full battery, the bulk stage has a minimum time requirement
of 1 hour, which allows the lithium cells inside the battery the time required to “balance”. For an
empty battery, the bulk stage has a maximum time requirement of 4 hours. If your application
requires longer than 4 hours (such as a larger battery bank > 200 Ahr), a simple cycling of power
will reset the timers.
As the energy is restored into the battery, the DC system voltage will climb and the current from
the converter will decrease. If the total amperage draw from the converter reaches a preset point
(within the 1 to 4 hour timer), the converter is designed to drop out of bulk mode.
ABSORPTION MODE
This mode is designed with 1 purpose in mind. This purpose is to provide a safe operating
voltage for all loads in the RV. This is accomplished by reducing (from bulk mode) the output
voltage to 13.6 VDC and remaining at this voltage until the power is cycled to the converter.
The absorption mode stage is the default or normal mode of operation, which has no timer
associated with it. In this mode an output of 13.6 VDC is provided to the DC circuits in the RV.
This voltage has a long-term history as the acceptable voltage for all loads in the RV, and should
not place undue stress (nor reduce the longevity) of the lights and appliances in the RV. This is not
to say that all loads will have an issue with a constant higher voltage; however, some loads may
have an issue. Please refer to the individual manufacturer’s specications for acceptable
operating voltage range of the connected load.

8
Before checking the WF-9800-AD Series Converter-Charger output voltage, disconnect the
battery cables at the battery. Make sure the converter is plugged into a live AC source (105-130
Volts). Check the converter output voltage at the battery with a voltmeter. Place the meter probes
on the disconnected battery cables; place the Positive (red) meter probe on the + Positive
battery wire and place the Negative (black) meter probe on the -Negative wire on the battery
cable (Figure 4). Be sure you have good connections at the cables. If the voltage reads 13.6 - 14.6
V, the converter is functioning properly.
If the converter output voltage at the battery reads 0.0 VDC, or if the battery is not charging
check for an open inline fuse in the battery wire circuit. One may have been installed by the RV
manufacturer. Also check for loose wiring connections.
Figure 4
TROUBLESHOOTING INSTRUCTIONS
Troubleshooting the WF-9800-AD Series Converter-Charger
CHECKING CONVERTER OUTPUT VOLTAGE

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CHECKING FOR REVERSE BATTERY HOOKUP (REVERSE POLARITY FUSES)
If there is no DC output coming from the WF-9800-AD Series Converter-Charger output lugs, rst
check the reverse polarity fuses on the rear panel. Then, visually inspect the fuses for any breaks
in the fuse element. If no breaks are found, use a continuity tester to check for continuity. If the
reverse polarity fuses are blown, it means the RV battery was accidentally connected in reverse,
either at the battery or at the converter. Investigate the connections and reconnect the cables
properly. Replace the fuse with the same type and amperage rating as the original.
IMPORTANT: These fuses protect the converter from damage if the RV battery is accidentally
connected in reverse. A reversed battery connection, even if for only a second, will cause these
fuses to blow.If the above checks have been made but the converter output still reads 0.0 VDC,
the converter is not functioning properly.
Figure 5
GENERAL COMPLIANCE INFORMATION
Agency Listings
UL
The WF-9800-AD Series Converter-Chargers are UL-Listed, and cUL-Listed (Canadian).
FCC COMPLIANCE CLASS B
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy, and if not
installed and used in accordance with the instruction manual, may cause harmful interference to
radio communications. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at his
own expense.

10
MOUNTING THE ENCLOSURE
The WF-9800-AD Series Converter-Charger enclosure should be mounted in an accessible area
such as a wall or in the side of a cabinet. Select a mounting location near the shore power and
battery (batteries), in an area where the owner is unlikely to store items as this could reduce clear-
ance requirements, obstruct ventilation openings and affect the performance of the
converter (Figure 6).
The location should be selected to prevent excessive heat, water, moisture, dust and dirt entering
the unit installed. As a rule, allow two cubic feet of clear airspace and or any additional venting as
necessary to prevent the unit from overheating. The front of the enclosure should not be ob-
structed to allow free air ow for the cooling fan (Figure 6).
An 8AWG copper conductor shall be used to bond the WF-9800-AD Series Converter-Charger to
the vehicle frame.
DC CONNECTIONS
Connect a Red 8 A WG wire to the POS+ lug on the distribution center’s fuse board. Make sure
this lug is torqued properly. In a similar fashion, connect a Black 8 AWG wire to the NEG- lug on
the distribution center’s fuse board.
A battery IS NOT required for converter operation. The battery works in conjunction with the
converter to supply DC power to the RV. A battery is typically only necessary if you do a lot of dry
camping or have slide-outs and/or a leveling system.
Figure 6
INSTALLATION INSTRUCTIONS
Installing the WF-9800-AD Series Converter-Charger

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The batteries can be either of the Lead-Acid (Flooded, Deep Cycle & AGM) or lithium
type. The Amp hour (Ah) rating should be shown on the battery; for example, 120Ah.
The higher the Amp hour rating, the longer the battery will be able to deliver power
when the converter is not plugged in.
When installing batteries, the batteries MUST be the same brand and type (preferably
the same age as well). Adding more batteries will provide longer use of DC appliances
when not on shore power. And, due to the additional battery load, the battery charging
time will also increase.
NOTE: The converter will not work without AC input. You may notice that, when a battery
is connected or reconnected to the converter’s output, the onboard fan may energize
for a few seconds. This is normal and is the converter’s circuitry recognizing the battery
voltage. You will notice the same occurrence when the converter is initially energized on
Shore power.
AC CONNECTIONS
The WF-9800-AD Series Converter-Chargers receive power from the power cord on the
opposite end of the enclosure from the DC lugs. The WF-9835-AD, WF-9845-AD and
WF-9855-AD have a standard 15 Amp plug.
The WF-9865-AD and WF-9875-AD have a 20 Amp plug due to the higher current required from
the AC line to produce the high DC current output. The 20 Amp plug and corresponding
receptacle are shown in Figure 7 below. The 20 Amp receptacle must be wired back to the fuse
box using 12AWG wire minimum.

12
Figure 7
Figure 8

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Figure 9

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WFCO extends, to the original owner, a Two Year Limited Product Warranty. This warranty is
in effect from the date of original purchase for a period of two years. This limited warranty is
extended specically for and is limited to Recreational Vehicle application and is only valid
within the continental United States, Alaska, Hawaii and the Provinces of Canada. WFCO
warrants, to the owner, that its products are free from defects in material and workmanship
under normal use and service based on its intended use and function. This warranty is
limited to the repair or replacement, at WFCO’s discretion, of any defective parts or
defective assembly. Any implied warranties of merchantability or tness for intended use
are limited in duration unless applicable State Law provides otherwise. You may have other
rights as specied by each individual state.
EXCLUSIONS AND LIMITATIONS
The OEM warranty specically does not apply to the following:
• Any WFCO product that has been repaired or altered by an unauthorized person.
• Any damage caused by misuse, faulty installation, testing, negligence, accident or any
WFCO product installed in a commercial vehicle.
• Any WFCO product, whose serial number has been defaced, altered or removed.
• Any WFCO product, whose installation has not been in accordance to the WFCO
written instructions.
• Any consequential damages arising from the loss of use of the product including but not
limited to: inconvenience, loss of service, loss of revenue, loss or damage to personal
property, cost of all services performed in removing or replacing the WFCO product.
Specications are subject to change without notice or obligation.
• Any WFCO Electronics products sold through unauthorized Internet sources
(Example: eBay) will be excluded from all warranty coverage offered by Arterra
Distribution / WFCO.
CONSUMER LIMITED WARRANTY
for WFCO Electronic Products

15
CONSUMER WARRANTY CLAIM PROCEDURE
Upon determination and validation by an authorized OEM dealer that a WFCO product has a
defect, a Return Goods Authorization (RGA) number will be required before the product can be
returned. The RGA number can be requested by completing the Warranty
Information Fax Sheet and appropriate Troubleshooting Form found at wfcoelectronics.com.
Once these forms have been completed, email the forms along with Proof of Purchase to
[email protected] or fax the three documents to the Warranty Department at (574)
294-8698. After receipt of the forms, an RGA number will be issued. This number shall appear
on all correspondence with warranty service. Upon validation of the warranty, WFCO shall re-
place the product with a like product. The RGA number shall be placed on the outside of the
carton used to return the product for ease of identication. Do not mark directly on the product.
The product must be packaged properly to avoid further product damage which could cause a
non-warrantable condition.
WARRANTY ASSISTANCE
The consumer may contact the selling Dealer or OEM for warranty assistance.
The consumer may also contact Arterra Distribution, exclusive distributor to WFCO Products at:
[phone] or Fax [phone].

ARTERRA DISTRIBUTION
[phone]
wfcoelectronics.com
WARRANTY
[email protected]
Fax [phone]
Distributed by Arterra in the U.S.A. and Canada
Power PROs Technical Support
[phone]