Description; Introduction - United Technologies Carrier TRANSICOLD 68RM35-604-20 Operation And Service

1.1

INTRODUCTION

This manual contains operating and electrical
Data, and service instructions for the 68RM35 bus
air conditioning system shown in Table 1-1. The
68RM35 unit is a one-piece system consisting of a
compressor, condenser, evaporator and electrical
control panel sections. The units are installed in
the rear A/C compartment of the bus.
These units interface with the bus driver switches
and pump to provide a complete air conditioning
system.
Model Number Refrigerant
68RM35-604-20 R-134a
SECTION 1

DESCRIPTION

All control systems are powered by 24 vdc
supplied by the bus battery and alternator or
alternate source.
Operation of the 68RM35 units is controlled
automatically by the electronic thermostat, which
maintains the vehicle's interior temperature at the
desired set point.
Table 1-1. Model Chart
Electronic Thermostat
Adjustable
1-1
Relay Board
Description
Configuration
Heat/Cool Reheat
Fan Motors
Wound Field
T-288