Installation Procedure; Drainage Piping Work; Water Piping Work - Mitsubishi Electric QUHZ-W40VA Manuel D'installation

3. Installation procedure

A
D
A M8 bolt
B Base
C As long as possible
D Set deep in the ground
E Max.30
mm
4. Drainage piping work (Optional)
<Removing the drain socket>
en
Clamp 2
1
Remove the piping cover, and remove the provided drain socket fromthe
(Fig. 4-1)
clamp 2.
2
Mount a drain hose (commercially-available 16 mm diameter hose) to
the drain socket.
3
Mount the drain socket to the drain port of the outdoor unit, and route it
to a position where the drain hose can be drained.

5. Water piping work

5.1. Water piping connection (Fig. 5-1)
• Connect the water pipes to the outlet and inlet pipes.
(Parallel male screw for 0.5-inch water pipe (ISO 228-1/ G½B))
• Inlet and outlet pipes position is shown on the Fig. 5-1.
• Maximum allowable torque at the water piping connection is 50 N•m.
• Check if water leaks after installation.
• Inlet water gauge pressure must be between 0-0.3 MPa.
• Use the inlet water with a temperature lower than 55 ˚C.
Note :
• The water velocity in pipes should be kept within certain limits of material to
avoid erosion, corrosion and excessive noise generation.
Be aware, and take care of, that local velocities in small pipes, bends and similar
obstructions can exceed the values above.
e.g.) Copper : 1.5 m/s
• When connecting metal pipes made of different materials, be sure to insulate the
joint to prevent electrolytic etching.
5.2. Water quality condition
• Be sure always use the specified antifreeze solution.
• Anti-freeze solutions MUST use propylene glycol with toxicity rating of Class 1 as
listed in Clinical Toxicology of Commercial Products, 5th Edition.
• The water in a system should be clean and with a pH value of 6.5-8.0.
• The followings are the maximum values; Calcium : 100mg/L, Chlorine : 100mg/L,
Iron/manganese : 0.5mg/L
Note :
1. Ethylene glycol is toxic and must NOT be used in the primary water circuit
in case of any cross-contamination of the secondary (potable) circuit.
2. For 2-zone valve ON/OFF control, propylene glycol MUST be used.
5.3. Minimum water quantity
Following water quantity is required in the water circuit.
Minimum water quantity (L)
40
3
A
B
C
Fig. 3-1
<Mounting the drain socket>
1
1 While pressing
down the stopper
2 Pull
Drain socket
Drain socket
Fig. 4-2
Fig. 4-1
(Fig. 4-2)
• Be sure to install the unit in a solid, level surface to prevent vibration noises during
operation. (Fig. 3-1)
<Foundation specifications>
Foundation bolt
Thickness of concrete
Length of bolt
Weight-bearing capacity
• Make sure that the length of the foundation bolt is within 30 mm from the surface
of the base.
• S ecure the base of the unit firmly with 4OM8 foundation bolts in solid locations.
Warning:
• The unit must be securely installed on a structure that can sustain its
weight. If the unit is mounted on an unstable structure, it may fall down and
cause damage or injuries.
• The unit must be installed according to the instructions in order to minimize
the risk of damage by earthquakes, extreme weather conditions. An
improperly installed unit may fall down and cause damage or injuries.
Note: Do not install the drain socket if there is a
3
2
1
Insert while pressing
into mounting hole
2
Drain hose(field supply)
• The clamp where the drain socket is secured in place is also used for holding
the power communication line, and so do not disconnect it.
• Drain hose is a field supply item.
• M ount firmly in place, and set it so that it has no slack and
has a continuous downward slope.
• Guide the drain water to the drain port using a suitable
method (method so that it does not freeze).
Note : Make sure to perform the frozen prevention measure for water pipe
system. (Water piping insulation, back-up pump system, using of a
certain % ethylene glycol instead of normal water)
Insulate the water piping properly. The performance can be poor if the
insulation is insufficient.
Warning:
As the water outlet temperature can reach 72ºC maximum, do not touch the
water piping directly with bare hands to avoid scalding risk.
M8
120 mm
70 mm
320 kg
possibility that drain freezes.
Notes
Drain hose
B
Water outlet
A
Water inlet
Fig. 5-1