Mitsubishi Electric CITY MULTI CMB-WP108NU-AA Manual De Instalación página 8

• When the piping length from the outdoor unit to the farthest HBC controller is
longer than 30.5 m (100 ft)
Amount of High-pressure pipe
additional ø22.2 total length
=
charge (kg) × 0.21 (kg/m)
Amount (kg/HBC
+
controller)
3.0
* Amount of refrigerant to be charged for
single-module units
* In the case all connected indoor unit
models are Case 1, add the following
amount of refrigerant.
Case 1: PEFY-WL06/24NMAU-A**
→ Add 0.55 kg per PEFY-WL06/24NMAU-A**.
(2) Units "ft" and "oz"
<Formula>
• When the piping length from the outdoor unit to the farthest HBC controller is
30.5 m (100 ft) or shorter
Amount of High-pressure pipe
additional ø7/8 total length
=
charge (oz) × 2.48 (oz/ft)
Outdoor unit model
PURY-(E)P72T/
YNU
PURY-(E)P96T/
YNU
+
PURY-(E)P120T/
YNU
PURY-(E)P144T/
YNU
PURY-(E)P168T/
YNU
Table <B>
* Amount of refrigerant to be charged for
single-module units
* In the case all connected indoor unit
models are Case 1, do Not add the
refrigerant listed in table <B>.
Instead, add the following amount of
refrigerant.
Case 1: PEFY-WL06/24NMAU-A**
→ Add 20 oz per PEFY-WL06/24NMAU-A**.
• When the piping length from the outdoor unit to the farthest HBC controller is
longer than 30.5 m (100 ft)
Amount of High-pressure pipe
additional ø7/8 total length
=
charge (oz) × 2.27 (oz/ft)
Amount (oz/HBC
controller)
+
106
* Amount of refrigerant to be charged for
single-module units
* In the case all connected indoor unit
models are Case 1, add the following
amount of refrigerant.
Case 1: PEFY-WL06/24NMAU-A**
→ Add 20 oz per PEFY-WL06/24NMAU-A**.
4.5. Drain piping work
1. Drain piping work
• Tilt the drain pan so that the water will flow toward the drain socket.
8
High-pressure pipe High-pressure pipe
ø19.05 total length ø15.88 total length
+ +
× 0.14 (kg/m) × 0.10 (kg/m)
High-pressure pipe High-pressure pipe
ø3/4 total length ø5/8 total length
+ +
× 1.73 (oz/ft) × 1.19 (oz/ft)
Amount (oz/HBC
Amount (oz)
controller)
+
53 106
53
106
89
142
High-pressure pipe High-pressure pipe
ø3/4 total length ø5/8 total length
+ +
× 1.52 (oz/ft) × 1.09 (oz/ft)
[Fig. 4.5.1]
①③
① Unscrew the two screws that are holding the side panel on the right side of the control
box.
② Tilt the drain pan.
③ Screw down the screws with the drain pan tilted.
• Ensure that the drain piping is downward (sloped gradient of more than 1/100) to
the outdoor (discharge) side. If it is impossible to take any downward pitch, use
an optionally available drain-up mechanism to obtain a downward pitch of more
than 1/100.
• Ensure that any cross-wise drain piping is less than 20 m [65 ft]. If the drain
piping is long, support it with metal brackets to prevent it from bending, warping,
or vibrating.
• Use a hard vinyl chloride pipe for drain piping.
• Ensure that collected pipes are 10 cm [3-15/16 in] lower than the unit body's
drain port.
• Do not provide any odor trap at the drain discharge port.
• Put the end of the drain piping in a position where no odor is generated.
• Do not put the end of the drain piping in any drain where ionic gases are
generated.
• When connecting the drain pipe to only one drain socket, use the drain
socket at the bottom, and cover the top one.
[Fig. 4.5.2]
Max. 20 m [65 ft]
1.5-2 m [5-6 ft]
Ⓐ
Ⓑ
Ⓚ
Ⓑ
Ⓓ
Ⓓ
Ⓙ Ⓔ Ⓕ
Ⓗ
○
Correct piping
×
Wrong piping
A Insulation (9 mm [6/16 in] or more)
B Downward slope (1/100 or more)
C Support metal
K Air bleeder
L Raised
M Odor trap
Grouped piping
D PVC TUBE
E Make it as large as possible. About 10 cm [3-15/16 in].
F Indoor unit
G Make the piping size large for grouped piping.
H Downward slope (1/100 or more)
I O.D. ø38 mm [1-8/16 in] PVC TUBE for grouped piping. (9 mm [6/16 in] or more
insulation)
J HBC controller
1. Insert the adapter (not supplied) into the drain port.
• Apply wraps overlapping of sealing tape (2 times)
• Torque the drain pan adapter to 2.5 Nm+/–0.5 [22 in-lb]
2. Attach the drain pipe (PVC TUBE, not supplied).
(Attach the pipe with glue.)
3. Perform insulation work on the drain pipe (PVC TUBE) and on the socket (includ-
ing elbow).
4. Check the drainage.
②
①③
Ⓒ
Ⓛ
Ⓜ
Ⓓ
Ⓕ
Ⓖ
Ⓘ