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PCB Settings

Due to our policy of continuous product innovation, some specifications may change without notification.

Addressing with Heat Recovery Units

(For Heat Recovery Systems Only)

General

Each heat recovery unit will have a unique address assign so the

outdoor unit will be able distinguish it from other heat recovery units.

Upon completion of the heat recovery unit address, the heat recov-

ery unit operating parameters will be set by adjusting the positions

DIP switches on SW02M and SW01M.

Procedure

Before beginning the physical process of assigning heat recovery

addresses, map out the address assignments using a copy of the

LATS tree mode diagram.

Guidelines

1. Addresses must be sequential and cannot be skipped.

2. Assign the lowest address to the heat recovery unit that has the

largest capacity indoor unit connected to port number 1. If the

capacity of all indoor units connected to port number 1 of each heat recovery unit is the same, assign address “0” to the heat recovery

unit farthest away from the outdoor unit. Assign the next address to the next farthest away and so on until all heat recovery units have an

address. The heat recovery unit with the highest address must be the one closest to the outdoor unit. Up to 16 heat recovery units can be

on a single system.

Possible settings in order of lowest to highest are: 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F.

Addressing must be performed following the detailed steps above because port number 1 on the heat recovery unit addressed “0” will remain open

during the auto pipe detect procedure. If the indoor unit capacity connected to the port is relatively small compared with other units on the system,

the outdoor unit high head pressure safety will trip and shut down the unit during the procedure. On LGMV, all addresses do not match because

LGMV does not see address “0”.

3. Record the address assigned to each heat recovery unit.

Figure 43: Heat Recovery Unit Main PCB.

Air Valve Housing

SSD

SW05M

SW01M

SW04MSW03M

(SW01M / SW03M / SW04M

Switches for Manual Valve Addressing)

SW02M

(DIP Switch for Set Up of Heat

Recovery Unit Functions)

No. 1 Valve Housing

HEAT RECOVERY UNIT SETTINGS

LG Multi V5 Service Manual

Questions and Answers: