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MS8 SERIES
Lennox MS8 SERIES User Manual
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Page 66
MS8C / MS8H (208-230V)
Refrigerant System Flow Diagrams
The following two diagrams illustrate refrigerant flow in either cooling or heating (heat pump only) operations.
INDOOR UNIT
OUTDOOR UNIT
COMPRESSOR
COOLING
Discharge
Suction
Capillary
INDOOR COIL
2-W
A
Y
SHUT-OFF
VA
LV
E
3-W
A
Y
SERVICE
VA
LV
E
MUFFLER
ACCUMULA
TOR
OUTDOOR COIL
STRAINER
STRAINER
ELECTRONIC
EXP
ANSION V
AL
VE
TYPICAL AIR CONDITIONER SYSTEM
FIGURE 72
INDOOR UNIT
OUTDOOR UNIT
COMPRESSOR
COOLING
HEA
TING
Discharge
Suction
ELECTRONIC
EXP
ANSION V
AL
VE
(EXCEPT 30K WHICH
USES CAPILLARY)
STRAINER
STRAINER
OUTDOOR COIL
ACCUMULA
TOR
MUFFLER
REVERSING
VA
LV
E
INDOOR COIL
2-W
A
Y
SHUT-OFF
VA
LV
E
3-W
A
Y
SERVICE
VA
LV
E
TYPICAL HEA
T PUMP SYSTEM
FIGURE 73
65
67
Table of Contents
Table of Contents
1
Overview
2
Shipping and Packing List
2
Required Tools and Supplies
3
Troubleshooting
4
Outdoor Unit
4
Matching Indoor Unit
4
Specifications
4
Model Number Identification
6
Unit Dimensions and Weights
6
Typical System Component Setup
7
II. Installation
8
General
8
Clearances
8
Torque Requirements for Caps and Fasteners
8
Setting Outdoor Unit
9
Repositioning Indoor Air Temperature Sensor
10
Indoor Unit Placement and Preparation
10
Indoor Unit Cable Connections
14
Securing Indoor Unit to Wall Mounting Bracket
15
Outdoor Unit Cable Connections
16
Operating Service Valves
19
Line Set Requirements
20
Leak Test and Evacuation
22
Unit Start-Up
23
Adding Refrigerant for Longer Line Sets
23
Checking Large Line Operating Pressures
23
Wrapping Bundle
25
Maintenance
26
Wireless Remote Functions
27
III. Operating the Wireless Remote
27
System Start up Using Wireless Remote
31
IV. System Operation and Service
35
System Operational Modes
35
System Functions
43
System Protection Features
44
Other Functions
46
Temperature Sensors
47
Indoor and Outdoor Control Parts Identifications
53
Indoor and Outdoor Error Codes
57
Refrigerant System Flow Diagrams
66
Typical Unit Wiring Diagrams
67
Troubleshooting
72
Major System Components
81
Optional Condensate Pump Wiring Connection
88
Disassembly Procedures
88
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Lennox MS8 SERIES Specifications
General
Brand
Lennox
Model
MS8 SERIES
Category
Air Conditioner
Language
English
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