Operator’s Manual WF-8900 Series WF-8935 | WF-8945 | WF-8955 | WF-8965 | WF-8975 ( The Power Center model number is located on the front panel label next to the breakers) Distributed in the U.S.A. and Canada by ARTERRA DISTRIBUTION (877) 294-8997 Warranty: warranty@wfcoelectronics.com Fax (574) 294-8698 www.wfcoelectronics.
TA B L E O F C O N T E N T S SAFETY INFORMATION ........................................................................................................... 3 GENERAL INFORMATION Reverse Battery Protection ........................................................................................................... 3 Blown Fuse Indicators ................................................................................................................... 4 Automatic Cooling Fan ...................................
GENERAL INFORMATION WF-8900 Series Power Center Safety Features Reverse Battery Protection The WF-8900 Series Power Centers will charge the 12-volt House battery if installed. A battery DOES NOT have to be installed for WF-8900 Series Power Center converter operation. When a battery is installed, two reverse polarity fuses protect the converter circuitry. The fuses are located along the left-center edge of the DC fuse board below the VCC+ lug. Refer to Figure 1 below.
The fuse values and quantity vary depending on which WF-8900 Series Power Center you have. Refer to the table and drawing below. • • • • • WF-8935 – 40A (1) *NOTE: Only one of the two Reverse Polarity terminals is used. WF-8945 – 30A (2) WF-8955 – 40A (2) WF-8965 – 20A (4) WF-8975 – 20A (4) Figure 1 Blown Fuse Indicators on DC Fuse Board The DC Fuse Board has individual blown fuse indicators as standard equipment. Each of the 11 DC fuse circuits contain a Red LED to indicate a blown fuse.
Short-Circuit Protection Should a short circuit occur in the RV, the WF-8900 Series Power Center converter 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 qualified service technician.
Manufacturer Model/Cat. No./Type Cutler Hammer Type BR and C, Type BRD, BD and A Thomas Betts Type TB or TBBD ITE/Siemens Type QP or QT Square D Type HOM or HOMT Murray Type MP-T or MH-T General Electric Type THQL When replacing any of the installed circuit breakers, the replacement should be of the same manufacturer, type designation, and equal interrupting rating, not to exceed 30 A. The “Short-Circuit-Current” rating for the breaker should be 10,000 Amps.
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.
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. Reverse Polarity Fuses If there is no DC output coming from the WF-8900 Series Power Center converter section, first check the reverse polarity fuses on the fuse board. Then, visually inspect the fuses for any breaks in the fuse element.
Should it be determined that the converter section of the WF-8900 Series Power Center needs to be replaced, removal of the Main Board Assembly is a simple process. Replacing the Converter Section (MBA) Make sure no AC power is coming into the RV from either the Shore Power cord or an on-board generator. Remove and set aside the Reverse Polarity Fuses to disconnect the converter section from the rest of the RV DC power. Perform the following steps: 1.
INSTALLATION INSTRUCTIONS Installing the WF-8900 Series Power Center Mounting the Enclosure The WF-8900 Series enclosure should be mounted in an accessible area such as a wall or in the side of a cabinet. The front of the enclosure should not be obstructed to allow free air flow for the cooling fan. The enclosure will slide into a rough opening of 12 3/16” W x 10 7/8” H. The enclosure depth is 7 1/4”. After wiring is completed, the enclosure fastens to the wall or cabinet using 8 wood screws (not supplied).
Figure 5 Figure 6 Wiring the DC Fuse Board Make sure the house battery is disconnected before beginning the DC wiring. Determine what DC loads are to be connected to the fuse board and what position they will occupy. Circuits F10 and F11 can be used for slide-outs or other higher current loads and can have a maximum 30 Amp ATO or ATC fuse installed. The remaining circuits are general purpose and can have up to 20 Amp ATO or ATC fuses installed. Make sure the fuses are seated properly.
All models have output screw terminal connections. Strip approximately 1/4” of insulation from the load’s wire and insert into the screw terminal. Tighten the terminal to the torque specified on the back of the enclosure. Connect the heavy wire (Red) coming from the battery to the POS+ lug located directly below the Reverse Polarity fuses. Make sure this lug is torque properly. As a last step, install a separate bus bar in a location behind the converter.
Figure 8 13
CONSUMER LIMITED WARRANTY for WFCO Electronic Products 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 (2) years. This limited warranty is extended specifically for and is limited to Recreational Vehicle application and is only valid within the continental United States, Alaska, Hawaii and the Provinces of Canada.
Back Side of the WF-8900 Series Power Center Figure 9 15
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