Mitsubishi Electric QUHZ-W40VA, Installation Manual

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C
B
A
D
E
A
3
en
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.
1
2
Fig. 3-1
3. Installation procedure
• Be sure to install the unit in a solid, level surface to prevent vibration noises during
operation. (Fig. 3-1)
<Foundation specifications>
Foundation bolt M8
Thickness of concrete 120 mm
Length of bolt 70 mm
Weight-bearing capacity 320 kg
• Make sure that the length of the foundation bolt is within 30 mm from the surface
of the base.
• Secure the base of the unit firmly with 4
O
M8 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.
4. Drainage piping work (Optional)
5. Water piping work
Fig. 5-1
A
M8 bolt
B
Base
C
As long as possible
D
Set deep in the ground
E
Max.30
mm
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.
• 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.
Minimum water quantity (L)
40
5.3. Minimum water quantity
Following water quantity is required in the water circuit.
5.2. Water quality condition
• Be sure always use the specified antifreeze solution.
Warning:
As the water outlet temperature can reach 72ºC maximum, do not touch the
water piping directly with bare hands to avoid scalding risk.
Fig. 4-1
Fig. 4-2
Note: Do not install the drain socket if there is a
possibility that drain freezes.
Water outlet
B
Water inlet
A
Insert while pressing
into mounting hole
Drain hose(field supply)
Drain socket
Drain socket
2 Pull
1
While pressing
down the stopper
Clamp 2
<Removing the drain socket> <Mounting the drain socket>
Notes
1
Remove the piping cover, and remove the provided drain socket fromthe
clamp 2.
(Fig. 4-1)
• 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.
2
Mount a drain hose (commercially-available 16 mm diameter hose) to
the drain socket.
(Fig. 4-2)
• Drain hose is a field supply item.
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.
• Mount 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).
Drain hose
2
1
3