McQuay MDS080BR Installation Guide download pdf (Page 98)

-98-

Design & installation Guide For McQuay MDS Multi System

Testing

CHAPTER

5.1 Hardware Diagram and Configuration

5.1.1 MDS Series Indoor Units

The indoor unit consists of a three-speed fan and an electronic expansion valve (electric heater and swing

function optional). The four temperature sensors respectively serve to measure the temperature of the indoor,

inlet coil, midlet coil and outlet coil. The MDS-A system can connect with a remove control or remote receiver

and, as a slave unit, communicates with outdoor units via RS485 interface. The DIP switches on the controller

determine the electric heater, power, unit model and address number.

MRS485 terminal resistor J2-1: ON/OFF indicate whether resistance is present or not.

Power supply

Temperature measurement

Communication port 1

Communication port 2

Memory 3

Model 1 SW1.1 SW1.2 SW1.3 SW1.4 SW1.5 SW1.6

OFF: No

Electric heater 1 Electric heater 2 Pump Reserve Reserve Reserve

ON: Yes

Model 1 setting (SW1.1 SW1.6)

3-speed fan

Electronic expansion valve

indicator

Electric heater

Swing

SW1:DIP switch

for function setting

SW2: DIP switch for

indoor unit address setting

SW3: DIP switch

for model setting

1 2 ... 93 94 95 96 97 98 99 100 101 102 103 ... 115 116

No comments

McQuay MDS080BR Installation Guide Page 98