Refrigerant Piping Work - Daikin FTQ18PBVJU Installation Manual

(3) Condensation may form on the product during COOL
operation. Be sure to provide (fi eld supplied) and
install a second drain pan.
If installed vertically
Second drain pan
If installed horizontally
Second drain pan
(4) Check if the unit is horizontally level.
CAUTION
• Make sure the unit is installed level using a level: four sides.
(One thing to watch out for in particular is if the unit is in-
stalled so that the slope is not in the direction of the drain
piping, this might cause leaking.)
If installed vertically
Level
English
If installed horizontally
(5) Secure the unit fi rmly to prevent it from falling.
5.
〈Observe the requirements listed below for refrigerant
piping sizes.〉
Drain piping
〈Execute heat insulation work completely on both sides of
the gas piping and the liquid piping or else a water leak-
age might result.
Failing to insulate the pipes may cause leaking or burns.
And be sure to use the insulation which can withstand
such temperatures of 248°F or more for the gas piping.
Reinforce the insulation on the refrigerant piping accord-
ing to the installation environment. If the temperature or
humidity in the product installation location might reach
86°F or 80%, respectively. Condensation may form on the
surface of the insulation.〉
Follow the points at below.
• Use a tube cutter and fl are suitable for the type of refriger-
Drain piping
ant.
• To prevent dust, moisture or other foreign matter from infi l-
trating the piping, either pinch the end or cover it with tape.
• Do not allow anything other than the designated refrigerant
to get mixed into the refrigerant circuit, such as air. If any
refrigerant gas leaks while working on the unit, immediately
ventilate the room.
(1) Connect the piping.
•
•
Level

REFRIGERANT PIPING WORK

Liquid
3/8 in.
CAUTION
The outdoor unit is fi lled with refrigerant.
When connecting or disconnecting piping to or from the
unit, be sure to use two spanners and two torque
wrenches. (Refer to Fig. 3)
Torque wrench
Flare nut
Fig. 3
Gas
5/8 in.
Spanner
Piping union
6