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Heat Recovery Unit - LG Multi IV Engineering Manual

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Heat recovery units are for use with ARUB Series heat recovery systems only.
Select an installation space for the heat recovery unit that meets the following conditions:
• Install the heat recovery unit indoors in a level and upright position.
• Ensure there is enough space in the installation area for service access.
• Refrigerant pipes must not exceed lengths specified by LG Electronics.
• Do not install the heat recovery unit in a location where it would be subjected to strong radiation heat from heat sources.
• Avoid an installation environment where oil splattering, vapor spray, or high-frequency electric noise could occur.
• Install the heat recovery unit in a location where any sound it may generate will not disturb occupants in the surrounding rooms.
• Install the refrigerant piping and electrical wiring system in an easily accessible location.
• Condensate drain piping is not required.
Figure 13: Dimensions for Heat Recovery Units.
18-15/16
Cap the pipes at the end of
series-connected branches
of heat recovery units.
17-3/4
4-7/8
6
2-7/16
16-1/2
6-7/8
Locate the inspection door at the control box side of the heat recovery unit.
1
2
If reducers are used, space for service access must be increased to match the dimensions of the reducer.
PLACEMENT CONSIDERATIONS
7
1
2
3
Inspection door
1
(servicing space)
4
5
5-7/16
6-7/8
17-7/8
©
Figure 14: Minimum Service Clearances for Heat Recovery Units.
11-13/16
more
Servicing space
11-13/16
more
Servicing space
2
Table 31: Heat Recovery Unit Parts.
Tag
Part Name
No.
Low pressure vapor pipe
1
connection port
High pressure vapor pipe
2
connection port
Liquid pipe connection
3
port
Indoor unit vapor pipe
4
connection port
Indoor unit liquid pipe
5
connection port
6
Control box
7
Hanger bracket
Heat Recovery Units
3-15/16 more
(Servicing space)
11-13/16
more
Servicing space
3-15/16 more
(Servicing space)
17-3/4
more
Servicing space
2
Connection Size(in.)/Type
PRHR022A PRHR032A PRHR042A
7/8 Braze
1-1/8 Braze 1-1/8 Braze
3/4 Braze
7/8 Braze
7/8 Braze
3/8 Braze
1/2 Braze
5/8 Braze
5/8 Braze
5/8 Braze
5/8 Braze
3/8 Braze
3/8 Braze
3/8 Braze
3/8 or 5/16
3/8 or 5/16
3/8 or 5/16
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