Pump Down Operation - Daikin FTXL35G2V1B Installation Manual

2-1. Caution on piping handling.
1) Protect the open end of the pipe against dust and moisture.
2) All pipe bends should be as gentle as possible. Use a pipe bender
for bending.
2-2. Selection of copper and heat insulation materials.
• When using commercial copper pipes and fittings, observe the following:
1) Insulation material: Polyethylene foam
Heat transfer rate: 0.041 to 0.052W/mK (0.035 to 0.045 kcal/(mh•°C))
Refrigerant gas pipe's surface temperature reaches 110°C max.
Choose heat insulation materials that will withstand this temperature.
2) Be sure to insulate both the gas and liquid piping and to provide insulation dimen-
sions as below.
Gas side
20/25 class
O.D. 9.5mm
30mm or more
Thickness 0.8mm (C1220T-O)
3) Use separate thermal insulation pipes for gas and liquid refrigerant pipes.

Pump Down Operation

In order to protect the environment, be sure to pump down when relocating or disposing of the unit.
1) Remove the valve cap from liquid stop valve and gas stop valve.
2) Carry out forced cooling operation.
3) After five to ten minutes, close the liquid stop valve with a hexagonal wrench.
4) After two to three minutes, close the gas stop valve and stop forced cooling operation.
How to force cooling operation mode
■ Using the indoor unit operation/stop button
Press the indoor unit operation/stop button for at least five seconds.
(Operation will start.)
• Forced cooling operation will stop automatically after around 15 minutes.
To force a test run to stop, press the indoor unit operation/stop button.
■ Using the main unit's remote controller
1) Press the "operation/stop" button.
(Operation will start.)
2) Press the temperature
3) Press the "operation select" button twice.
( will be displayed and the unit will enter test run mode.)
4) Press the "operation select" button to return the operation mode to cooling.
• Test run mode will stop automatically after around 30 minutes. To force a test run to stop, press the operation/stop button.
CAUTION
1) After closing the liquid stop valve, close the gas stop valve within three minutes, then stop the forced operation.
■English
Liquid side
35 class
O.D. 12.7mm O.D. 6.4mm
Minimum bend radius
40mm or more 30mm or more
button and the "operation select" button at the same time.
Rain
If no flare cap is
available, cover
the flare mouth
with tape to keep
dirt or water out.
Gas pipe
Gas pipe
insulation
Gas pipe thermal insulation
20/25 class 35 class
I.D. 12-15mm I.D. 14-16mm
Thickness 10mm Min.
Liquid
stop valve
Gas
stop valve
Wall
Be sure to
place a cap.
Inter-unit wiring
Liquid pipe
Liquid pipe
insulation
Finishing tape
Drain hose
Liquid pipe
thermal insulation
I.D. 8-10mm
Hexagonal
wrench
Close
Valve cap
12