CD-M-00001-6 (WF-8735 8740 Manual).cdr
Contents
1. Installation Operator Manual For use with WFCO ULTRA III Power Center Model WE 8735P and WF 8740P Distributed in the U S A and Canada by CHENG USA INC Sales 574 294 8997 Warranty Service 877 294 8997 Fax 5 4 294 8698 V Z z m QO z V Z m lt V OEM Installation of the WFCO 8735 40 Power Center Select a mounting location near the shore power and battery batteries and cut a rough opening 1 8 wider than the box to allow the power center to slide in easily Do not install close to appliances that are a source of heat or water such as water heaters furnaces and under refrigerators It is not designed for mounting in wet locations It must be protected from direct contact with water This unit employs components that tend to produce arcs or sparks To prevent fire or explosion do not install in compartments containing batteries or flammable materials LPgas To prevent fire do not cover or obstruct ventilation openings Do not mount in zero clearance compartment Overheating may result For continued protection against risk of fire or electric shock replace only with same type and ratings of fuse The fuse rating that the manufacturer suggests for the output fuses will be marked on the unit Replace only with same type and rating During the manufacturing process be sure that all converter openings are protected from debris falling into the unit2. Littelfus Type 257 fuse Figure 3 IMPORTANT If the reverse polarity fuse is blown it means the RV battery was accidentally connected in reverse either at the battery or at the converter Connect the battery properly and then replace with ATC Littelfuse Type 257 fuse Reverse battery protection fuse protects the converter from damage in the event the RV battery cables are accidentally connected in reverse A reverse battery condition for even a second is the only way this fuse will blow If the converter output voltage reads in the 13 6 Vdc range and the battery is not charging check for an open inline fuse in the battery wire if provided an open wire between the converter and the RV battery loose ground improper torques If the converter fuses and AC voltage are good but the converter output still reads zero volts the converter is not functioning properly Contact Cheng USA Inc Tech Support at 1 877 294 8997 D O z z m Mm wm I O 7 D x S O wW W O z al A O O GENERAL COMPLIANCE INFORMATION The WF 8700 Series units are UL Listed and cUL Listed Canadian They comply with FCC Class B requirement see below 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 reasonab
3. unless the converter is in overload condition There are two signs of an overloaded converter Low output voltage and full converter fold back or shutdown In both cases the converter will automatically turn ON once the complete load is removed For low output condition removing the extra over the current rating load will be sufficient If it is impractical to remove all the load resetting the main breaker will have the same effect Float Mode If the RV is not being used for approximately 48 hours with a no load condition and the shore power is plugged in the converter will automatically go into the Float mode In this mode the converter is charging the battery with a trickle voltage of 13 2 Vdc When the converter senses a demand by turning on lights the converter automatically returns to the Absorption mode 13 6 Vdc Troubleshooting Before checking the converter output voltage it is necessary to disconnect the battery terminal wires Cap each wire or wrap with electrical tape Make sure the converter is plugged into 30A 105 130 Vac source Check the converter output voltage with a voltmeter On the back of the unit place the probe on the White negative output wire and then place the test probe on each fuse on the output Be sure you have good connections at the fuse holders If the voltage reads 13 6 Vdc 2 the converter is functioning properly WE 8735 MODEL NUMBER t ATC style
4. non warrantable condition CD M 00001 6
5. ED2 Ri RESTO LED3 Ri aayan pa R Ri seamh LED5 Ri m reamh LED FUSE REVERSE BATTERY E9 PROTECTION FUSE C Y gt m m D J z V 0 S O z Y OPERATIONAL FEATURES Converter Operation Modes All WFCO power converters are automatic three stage switching power supplies The converter senses which mode it needs to be in by checking the RV system voltage The three modes stages of operation include Absorption mode Normal operation Nominal battery charge and supplies power to appliances Bulk mode Charge mode Fast battery charge and supplies power to appliances Float mode Trickle charge Trickle battery charge during storage Absorption Mode During this mode the converter output is in the 13 6 Vdc range This is the normal operation mode This mode provides the 12 Vdc and current required by the 12 Vdc RV appliances as well as slow charging the battery Bulk Mode When the converter senses that the RV system voltage is less than 13 2 Vdc equivalent to less than 50 of battery charge the converter will automatically go into the Bulk mode In this mode the output voltage of the converter will switch to 14 4 Vdc for a maximum of four hours If the converter cycles between Absorption and Bulk mode there could be a shorted battery cell or other issues If the output voltage drops below 13 2 Vdc the converter automatically changes to a Bulk mode 14 4 Vdc
6. This is a non warranty item NOTE If the reverse battery protection fuses are blown during installation be sure that the battery has been connected properly then replace the fuses with ATC Littelfuse Type 257 with the same rating as the original Figure 1 TOP VIEW 11 7 8 DC OUTPUT REAR VIEW Co A ane i GROUND WIRE HOLE 120VAC IN O 7 1 0 i OG j 87 8 BOTTOM VIEW 5 1 8 2 3 32 8 1 16 IKOH 1 7 8 11 7 8 10 1 16 4 1 8 z 7 gt gt a Q 1 A Cc Q INSTALLATION INSTRUCTIONS General Consumer Information Reverse Battery Protection This feature prevents permanent damage to the converter from an incorrect battery connection Automatic Cooling Fan The fan is variable speed and current controlled Electronic Current Limiting Automatically shuts down power during overload or short circuit conditions Automatically returns to normal operation after conditions are corrected DC Fuses Six 12 Vdc circuits including one battery circuit one circuit for slideouts Maximum of 30 Adc fuse for DC circuits 5 and 6 all others max 20 Adc Reverse battery protection fuse replace only with ATC Littelfuse Type 257 fuse Circuit Breakers One 30 Aac Main circuit and a maximum of five 20 Aac Branch circuits UL Listed Main Circuit Brea
7. kers rated for 120 Vac maximum 30 Aac Acceptable circuit breakers are as follows Manufacturer Model Cat No Type Cutler Hammer Type BR and C 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 UL Listed Branch Circuit Breakers rated for 120 Vac maximum 20 Aac Acceptable circuit breakers are as follows Manufacturer Model Cat No Type Cutler Hammer Type BR and C Type BRD BD and A Thomas Betts Type TB and TBBD ITE Siemens Type QP or QT Square D Type HOM and HOMT Murray Type MH T or MP T A replacement or additional circuit breaker shall be of the same manufacturer type designation and equal or greater interrupting rating not to exceed 30 A Short Circuit Current rating for the breaker should be 10 000 A Breaker Filler Plates Manufacturer Model Cat No Type WFCO FP 01 or FP 01B WE 8735 and WF 8740 Wiring Diagram MAIN BREAKER HOLD DOWN MAIN BREAKER CHASSIS GROUND SHORE POWER GROUND HOT NEUTRAL AC GROUND TERMINAL BAR For proper wire sizes and torque requirements refer to the label on the FROM CONVERTER ND GREEN WIRE Ground BLACK WIRE Hot A WHITE WIRE Neutral D OS RE NEUTRAL TERMINATE NEUTRAL TERMINAL all Figure 2 sor door assembly Ri HBa LED1 Ri FAGaSSIO L
8. le 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 1s likely to cause harmful interference in which case the user will be required to correct the interference at his own expense Consumer Limited Warranty for WFCO Electronic Products WECO 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 valid only 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 fitness for intended use are limited in duration unless applicable State Law provides otherwise You may have other rights as specified by each individual State EXCLUSIONS and LIMITATIONS The OEM Warranty specifica
9. lly does not apply to the following Any WFCO product that has been repaired or altered by any unauthorized person Any damage caused by misuse faulty installation testing negligence or 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 with the WECO written instruction 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 and cost of all services performed in removing or replacing the WFCO product Specifications are subject to change without notice or obligation T m D X D D z j lt CONSUMER WARRANTY CLAIM PROCEDURE Upon determination and validation by an authorized OEM dealer that a WFCO product has a defect the dealer shall contact the WFCO warranty service number 877 294 8997 and obtain a return goods authorization RGA number This number shall appear on all correspondence with warranty service Upon validation of the warranty WFCO shall replace or repair 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 identification Do not mark directly on the product The product must be packaged properly to avoid further damage to the product which could cause a
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