Drainage Piping Work; Water Piping Work (Only For Air To Water Heat Pump); Electrical Work - Mitsubishi Electric PUHZ-SHW HA Series Installation Manual

4. Installing the refrigerant piping
<Limits of refrigerant piping installation>
SHW112, 140 : A+B+C ≤ 75 m
SHW230 : A+B+C ≤ 80 m
Fig. 4-9

5. Drainage piping work

Outdoor unit drainage pipe connection
PUHZ-SHW series is not connectable with a drainage pipe because of cold district specification.

6. Water piping work (Only for Air to Water Heat Pump)

Minimum water quantity
Following water quantity is required in the water circuit.
Model Minimum water quantity (L)
SHW80 34
SHW112 48
SHW140 60
SHW230 99
Make sure to perform freeze protection measure such as applying anti-freeze solution when operating the unit on cooling mode under low ambient temperature (under 0 °C).

7. Electrical work

7.1. Outdoor unit (Fig. 7-1, Fig. 7-2)
1 Remove the service panel.
2 Wire the cables referring to the Fig. 7-1 and the Fig. 7-2.
S1
S2
S3
B
L N S1 S2 S3
E
D
For Power For Power D
B
E
Fig. 7-1
Note: Only for Air to Water Heat Pump
When multiple indoor units (Hydro boxes) are connected to the outdoor unit,
wire the PCB of either one of the indoor unit and the outdoor unit (S1, S2,
S3).
It is impossible to connect the PCBs of multiple indoor units to the outdoor
unit.
8
A Indoor unit
B Outdoor unit
C Multi distribution pipe (option)
D Height difference
(Indoor unit Outdoor unit) Max. 30 m
E Height difference
(Indoor unit Indoor unit) Max. 1 m
A: Main piping
B, C: Branch piping
Max. 20 m
A
A Indoor unit
B Outdoor unit
C Remote controller
C
D Main switch (Breaker)
E Earth
A A
C
E
E
4.7. For twin/triple/quadruple combination (Fig. 4-9)
(Only for Air-Conditioners)
• When this unit is used as a FREE COMPO MULTI unit, install the refrigerant piping
with the restrictions indicated in the drawing on the left. In addition, if the restric-
tions are going to be exceeded, or if there are going to be combinations of indoor
and outdoor units, refer to installation instructions for the indoor unit for details
about the installation.
Outdoor unit
SHW112, 140
SHW230
Outdoor unit
SHW112, 140, 230
A
F Terminal block
G Indoor/Outdoor connection terminal block (S1, S2, S3)
H Service panel
I Clamp
J Earth terminal
* Clamp the cables so that they do not contact the center of the service panel or the gas valve.
Note :
If the protective sheet for the electrical box is removed during servicing, be
sure to reinstall it.
Caution:
Be sure to install N-Line. Without N-Line, it could cause damage to the unit.
Permissible total Charge-less
piping length piping length
A+B+C A+B+C
75 m or less 30 m or less
80 m or less 30 m or less
|B-C| No. of bends
8 m or less Within 15
SHW80, 112V
J
L N S1 S2 S3
J
SHW112 - 230Y
J
L1 L2 L3 N S1 S2 S3
Fig. 7-2
J