RV Products 8535 SERIES Service Manual download pdf

Page -1-

! WARNING - SHOCK HAZARD!

DANGER

SERVICE MANUAL

12VDC WALL THERMOSTAT

AIR CONDITIONING

SYSTEMS

ROOFTOP UNITS ONLY

TO PREVENT THE POSSIBILITY OF SEVERE PERSONAL INJURY, DEATH, OR

EQUIPMENT DAMAGE DUE TO ELECTRICAL SHOCK, ALWAYS BE SURE THE

POWER SUPPLY TO THE APPLIANCE IS DISCONNECTED BEFORE DOING ANY

WORK ON THE APPLIANCE. THIS CAN NORMALLY BE ACCOMPLISHED BY

SWITCHING THE BREAKER FOR THE AIR CONDITIONER TO OFF,

DISCONNECTING ALL EXTERNAL ELECTRICAL CONNECTIONS AND CORDS,

SWITCHING ON BOARD ELECTRICAL GENERATORS AND INVERTERS TO OFF,

AND REMOVING THE CABLE FROM EACH POSITIVE TERMINAL ON ALL

STORAGE AND STARTING BATTERIES.

SOME DIAGNOSTIC TESTING MAY BE DONE ON ENERGIZED CIRCUITS.

ELECTRICAL SHOCK CAN OCCUR IF NOT TESTED PROPERLY. TESTING TO BE

DONE BY QUALIFIED TECHNICIANS ONLY

The steps outlined in this manual are intended to guide the service technician through the

process of correctly diagnosing a Coleman Mach series rooftop air conditioner

with a remote wall thermostat control system.

1 2 3 4 5 6 ... 17 18

Summary of Contents

Page 1 - ! WARNING - SHOCK HAZARD!

Page -1-! WARNING - SHOCK HAZARD! DANGER SERVICE MANUAL12VDC WALL THERMOSTATAIR CONDITIONINGSYSTEMS ROOFTOP UNITS ONLYTO PREVE

Page 2 - Page -2

Page -10-Anytime the thermostat is placed in the HIGH COOL position you should be able to read12VDC between terminals GH and B for the High Fan, and

Page 3

Page -11-Figure 7. High Voltage 9-Pin ConnectorNote: To check voltage at the 9 pin connector plug it may be necessary to unplug the upper unit fromthe

Page 4

Page -12-

Page 5

Page -13-

Page 6

Page -14-

Page 7

Page -15-

Page 8

Page -16-VI.WIRING DIAGRAMS 7330-730 & 8330-733 Series Cool Only Ducted Ceiling Plenums7330-735, 7330-736 & 8330-735 Series Heat/ Cool Ducted

Page 9

Page -17-7330-720 & 8330-723 Series Cool Only Remote Free Delivery Ceiling Plenums7330-725, 7330-726 & 8330-725 Series Heat/Cool Remote Free D

Page 10

Page -18-RV ProductsA Division of Airxcel, Inc.P.O. Box 4020Wichita, KS 672041976-376 (4-02)

Page 11

Page -2-TABLE OF CONTENTS PAGEI. INTRODUCTION TO WALL THERMOSTATS ... 3II INTRODUCTION TO RELAYS ...

Page 12 - Page -12

Page -3-I.INTRODUCTION TO WALL THERMOSTATSAll of the air conditioning functions are controlled by the wall mounted thermostat . Thesethermostats utili

Page 13 - Page -13

Page -4-The following chart shows the different electrical connections made by the thermostat duringoperation. The chart below assumes12VDC(+) is supp

Page 14 - Page -14

Page -5-THERMOSTAT LOCATIONThermostats are very sensitive instruments. For accurate temperature control and comfort thefollowing considerations for th

Page 15 - Page -15

Page -6-Figure 1III.CEILING PLENUMS WITH INDIVIDUAL RELAYSRecreational Vehicle Products built 2 types of ceiling assembly packages which incorporate i

Page 16 - WIRING DIAGRAMS

Page -7-Figure 3The following charts depict the thermostat control wiring, ceiling assembly wiring destinations, andrelay functions for air conditione

Page 17 - Page -17

Page -8-furnace control circuit, (Usually a time delay relay located at the furnace).IV.CEILING PLENUMS WITH PRINTED CIRCUIT BOARDSMost of the 7000 an

Page 18 - Page -18

Page -9-Note: In ducted applications similar to the one found in Figure 4, the Printed Circuit Board /Control Box Assembly is found mounted in the re