Drain Piping Work - Daikin FFQ25BV1B Installation Manual

• Make absolutely sure to execute heat insulation works on the pipe-connecting section after checking gas
leakage by thoroughly studying the following figure and using the attached heat insulating materials for fit-
ting (8) and (9). (Fasten both ends with the clamps (4).)
(Refer to Fig. 16)
• Wrap the sealing pad (11) only around the insulation for the joints on the gas piping side.
(Refer to Fig. 16)
Liquid piping
CAUTION
Be sure to insulate any field piping all the way to the piping connection inside the unit. Any exposed piping
may cause condensation or burns if touched.

7. DRAIN PIPING WORK

(1) Carry out the drain piping
• Lay pipes so as to ensure that drainage can occur with problems.
• Employ a pipe with either the same diameter or with the diameter larger (excluding the raising section)
than that of the connecting pipe (PVC pipe, nominal diameter 20 mm, outside diameter 26 mm).
• keep the drain pipe short and sloping downwards at a gradient of at least 1/100 to prevent air pockets
from forming.
• If the drain hose cannot be sufficiently set on a slope, refer to PRECAUTIONS FOR DRAIN RAISING PIP-
ING on page 12.
• To keep the drain hose from sagging, space hanger bracket every 1 to 1.5 m.
Hanger bracket
• Use the attached drain hose (1) and clamp (2).
• Insert the drain hose into the drain socket up to the base, and tighten the clamp securely within the portion
of a gray tape of the hose-inserted tip. Tighten the clamp until the screw head is less than 4 mm from the
hose.
• Make sure that heat insulation work is executed on the following 2 spots to prevent any possible water
leakage due to dew condensation.
• Indoor drain pipe
English
Small sealing pad
(attached) (11)
(Wrap the piping union
with the sealing pad.)
Clamp (4)
(Big 4)
(attached)
Gas piping
1/100
gradient or more
GOOD
Fig. 17
Insulation for fitting
(attached) (9)
(for liquid pipe)
Insulation for fitting (attached) (8)
(for gas pipe)
Fig. 16
WRONG
Fig. 18
11