Toshiba Carrier MCY-MAP0367HS-UL Manuel D'installation page 14

Example: (060 type)
L2
L1
L4
A
L1 Ø3/8": 32.8 ft L2 Ø3/8": 32.8 ft
L5 Ø1/4": 9.8 ft L6 Ø1/4": 13.1 ft
Additional charge amount R (lbs)
Lx: Real total length of liquid pipe diameter
Ly: Real total length of liquid pipe diameter
= {( Lx × 0.017 lbs/ft ) + ( Ly × 0.038 lbs/ft )} × 1.2 + ( 1.76 lbs )
= {( 39.3 × 0.017 lbs ) + ( 91.8 × 0.038 lbs )} × 1.2 + ( 1.76 lbs )
= 6.75 lbs
In case of an Outside Air Unit connection (048 type)
L8
L8 Φ3/8": 50.0 ft
Additional charge amount R (lbs)
= (Ly × 0.038 lbs/ft ) × 1.0 + ( 0.88 lbs )
= (50.0 × 0.038 lbs/ft ) × 1.0 + ( 0.88 lbs )
= 2.78 lbs
Charging of refrigerant
• Keep the outdoor unit's valve closed, be sure to charge the liquid refrigerant into the service port at the liquid side.
• If the specified amount of refrigerant cannot be charged, fully open the outdoor unit's valves at the liquid and gas
sides, operate the air conditioner in the COOL mode, and then charge the refrigerant into the service port at the gas
side. In this time, choke the refrigerant slightly by operating the valve of the canister to charge the liquid refrigerant.
• The liquid refrigerant may be charged suddenly, therefore be sure to charge refrigerant gradually.
EN-25
L3
L7
L6
L5
B C
L3 Ø3/8": 16.4 ft L4
L7 Ø1/4": 16.4 ft
(ft)
1/4"
(ft)
3/8"
– 13 –
 Full opening of the valve
Open the valves of the outdoor unit fully.
* Do not open or close the valves when the ambient temperature is -20°C or less. Doing so may damage the valve O-
rings and result in refrigerant leakage.
Liquid side
Packed valve
Using a 4 mm-hexagonal wrench,
fully open the valve rods.
D
Ø3/8": 9.8 ft
Cap tightening torque
Valve size
Service port
 Heat insulation for pipe
• Apply the pipe's heat insulation separately at the liquid and gas sides.
• Be sure to use a thermal insulator resistant up to 248 °F (120 °C) or higher for pipes at the gas side.
 Finishing after connecting pipes
• After the piping connection work has been finished, cover the opening of the piping / wiring panel with the piping
cover, or fill silicon or putty in the space between the pipes.
• In case of drawing-out the pipes downward or sideward, also close the openings of the base plate and the side
plate.
• Under the opened condition, a problem may be caused due to the entering of water or dust.
When using the piping cover
Pipe holding bracket
Attach the pipe holding brackets following the table below.
Diameter of pipe in (mm)
Ø3/4" (Ø19.05) or less
Valve unit
Using a minus
screwdriver, turn it
counterclockwise
by 90° until it hits
the stopper. (Full
Service open)
port
Flare nut
24 to 31 ft•lbs
Ø3/8 (9.5 mm)
(33 to 42 N•m)
Ø5/8 (15.9 mm) 15 to 18 ft•lbs
Ø3/4 (19.1 mm) (20 to 25 N•m)
10 to 13 ft•lbs
(14 to 18 N•m)
When not using the piping cover
Drawing-out rearward
Drawing-out sideward
Drawing-out downward
Interval
78.7" (2 m)
Gas side
Grooves
for
Closed Opened
driver
completely fully
Drawing-out rearward
Drawing-out sideward
Drawing-out downward
EN-26