Cautions On Installation; Refrigerant Piping Work - Daikin RZQ18PVJU Installation Manual

(2) When an obstruction is present on the air inlet side
NOTE
1. Only two outdoor units can be stacked.
2. About 4 in. is required as the drain piping size for the upper
outdoor unit.
3. Close the area Z (gap between the upper outdoor unit and
the lower outdoor unit) so that the outlet air does not by-
pass there.
(E) When outdoor units are installed in rows (on the roof-
top, etc.)
(1) When one outdoor unit is installed in each row
(2) When two or more outdoor units are installed side
by side
The dimensional relationship between H, L and A is as
shown in the table below.
0 < L ≤ 1/2H
L ≤ H
1/2H < L ≤ H
H < L
English
Z
L A
10
12
Installation is not allowed.
5.

CAUTIONS ON INSTALLATION

• Before installation, confi rm the strength and levelness of the
foundation so that vibrations and noise are not generated.
• Fix the outdoor unit securely on a rigid base with foundation
bolts as shown in the foundation drawing below.
(Prepare 4 sets of commercially available M12-type or
equivalent foundation bolts, nuts and washers.)
• Use resin washers to prevent the paint from being scratched
off and rusting.
• The foundation bolts should be protruded by 15/16 in.
(Refer to fi gure)
Resin
washer
〈〈Drain treatment〉〉
• In a location where drain from the outdoor unit may cause
troubles (for example, where drainage may splash on gen-
eral passersby), perform the drain piping work using the
drain plug (optional).
• For drain treatment, space of at least 4 in. is required under
the bottom frame of the outdoor unit.
• In the drain piping work, make sure that drainage is dis-
charged securely.
(When routing the piping downward, check for water leak-
age.)
Air outlet side
5 1/2
Bottom view
(unit: inch)
1 7/8
16 5/8
24 1/8
6.

REFRIGERANT PIPING WORK

CAUTION
<To piping technician>
• Make sure to open the stop valves after fi nishing the
piping work. (Refer to the table shown in " 6-7 Additional
refrigerant charge".)
(Operating the air conditioner with the stop valve shut
may damage the compressor.)
• Use R410A to add refrigerant. (The R410A refrigerant
cylinder has a pink stripe painted around it.)
All fi eld piping must be installed by a licensed refrigeration
technician and must comply with relevant local and national
regulations.
• BRAZING REFRIGERANT PIPING
Do not use fl ux when brazing copper-to copper refrigerant
piping.
(Particularly for the HFC refrigerant piping) Therefore, use
the phosphor copper brazing fi ller metal (BCuP) which does
not require fl ux.
13/16
5 1/2
24 3/8
Drain hole
8