Page 2
IM 820
Table of Contents
Model Numbers . . . . . . . . . . . . . . . . . . . . . 2
General Information . . . . . . . . . . . . . . . . . . 3
Safety Precautions .......................................3
Unit Dimensions . . . . . . . . . . . . . . . . . . . . 4
Indoor Units ..................................................4
Outdoor Units ............................................... 4
Installation Guidelines . . . . . . . . . . . . . . . 5
Installation Diagram .....................................5
Installation of Outdoor Unit ...........................5
Installation of the Indoor Unit .......................6
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Indoor Unit Clearances . . . . . . . . . . . . . . . . 6
Standard Mounting . . . . . . . . . . . . . . . . . . . 7
Semi-enclosed Mounting . . . . . . . . . . . . . . 7
Refrigerant Tubing . . . . . . . . . . . . . . . . . . 8
Tubing Length & Elevation . . . . . . . . . . . . . 8
Tubing Preparation . . . . . . . . . . . . . . . . . . . 8
Tubing Connection To Units . . . . . . . . . . . . 8
Electrical Connections . . . . . . . . . . . . . . . 9
Wiring Diagrams . . . . . . . . . . . . . . . . . . . 10
Evacuating and Charging . . . . . . . . . . . . 17
Evacuating the tubing and the indoor unit . 17
Additional charge . . . . . . . . . . . . . . . . . . . .17
Charge operation . . . . . . . . . . . . . . . . . . . . 17
Remote Controller Operation Guide . . . .18
Netware 2 - Wired Wall Control (Optional) 19
Special Features . . . . . . . . . . . . . . . . . . . .20
Dry mode . . . . . . . . . . . . . . . . . . . . . . . . . .20
Heat mode (heat pump only) . . . . . . . . . . .20
Overheating protection (heat pump only) . .20
Frost prevention . . . . . . . . . . . . . . . . . . . . .20
Fan speed and rated cooling capacity . . . .20
Operating Conditions ................................. 20
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Overall Checking . . . . . . . . . . . . . . . . . . . .20
Unit Indicator Lights . . . . . . . . . . . . . . . . 21
IR signal receiver . . . . . . . . . . . . . . . . . . . .21
Netware 2 - Wired Wall Control (Optional) .21
Service and Maintenance . . . . . . . . . . . . 22
Electrostatic Filters . . . . . . . . . . . . . . . . . . 22
Filter Replacement . . . . . . . . . . . . . . . . . . .22
Startup After Extended Shutdown . . . . . . .22
Troubleshooting . . . . . . . . . . . . . . . . . . . . .22
Service and Maintenance . . . . . . . . . . . . . .23
Model Numbers
Cooling Only
Cooling/Heat Pump
Indoor Unit
Outdoor Unit
Nominal Cooling - BTUH
MCM20D
MLC20B
20,000
MCM25D
MLC25B
25,000
MCM30D
MLC30C
30,000
MCM40D
MLC40C
40,000
MCM50D
MLC50C
50,000
Indoor Unit
Outdoor Unit
Nominal Cooling - BTUH
Nominal Heating - BTUH
MCM20DR
MLC20BR
20,000
21,000
MCM25DR
MLC25BR
24,000
25,000
MCM30DR
MLC30CR
30,000
32,000
MCM40DR
MLC40CR
40,000
41,000
MCM50DR
MLC50CR
50,000
48,000