Lennox MMA036S4 - MLB and MPC Multi-Zone Outdoor Unit Connections and Line Set Usage

54
9. Master Valves (3 to 5 Zone Outdoor Units)
• 3-zone, 4-zone and 5-zone (not 2-zone) multi-zone
units have a master valve on each refrigerant line.
• The master valve controls refrigerant to all of the zone-
supply valves.
• Open the master valves prior to opening the zone-
supply valves.
Liquid Line
Master Valve
Vapor Line
Master Valve
10. MLB and MPC Multi-Zone Outdoor Unit Connections and Line Set Usage
MPC024S4M
Number of Zones and Outdoor Unit Connection Sizes
NOTE - Letter = Indoor Unit Zone Connection on Outdoor Unit
Zone 1 (A) Zone 2 (B) Zone 3 (C)
1/4 in. liq + 3/8 in. gas 1/4 in. liq + 3/8 in. gas 1/4 in. liq + 3/8 in. gas
012 006 - - -
018 006 - - -
009 009 - - -
012 009 - - -
018 009 - - -
012 012 - - -
018 012 - - -
018 018 - - -
006 006 006
009 006 006
012 006 006
018 006 006