Dimensions For Heat Recovery Units; Minimum Service Clearances For Heat Recovery Units; Heat Recovery Unit Parts - LG Multi IV Engineering Manual

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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