Lifting Method; Installation Of Unit; Installation; Service Space - Mitsubishi Electric CITY MULTI PQHY-P200YHM-A Manuel D'installation

6. Lifting method

[Fig. 6.0.1] (P.2)
• Use suspension ropes that will withstand the weight of the unit.
• When moving the unit, use a 4-point suspension, and avoid giving impacts
to the unit (Do not use 2-point suspension).
• Place protective pads on the unit where it comes in contact with the ropes to
protect the unit from being scratched.
• Set the angle of roping at 40° or less.
• Use 2 ropes that are each longer than 8 meters.
• Place protective padding at the corners of the product to protect the product
from scratches or dents that might be caused by the rope.

7. Installation of unit

7.1. Installation

[Fig. 7.1.1] (P.2)
<A> Without detachable leg
M10 anchor bolt procured at the
A
site.
Check that the corner of the
C
installation leg is securely supported.
• Fix unit tightly with bolts so that unit will not fall down due to earthquakes or
strong winds.
• Use concrete or an angle bracket for the foundation of unit.
• Vibration may be transmitted to the installation section and noise and
vibration may be generated from the fl oor and walls, depending on the
installation conditions. Therefore, provide ample vibrationproofi ng (cushion
pads, cushion frame, etc.).
• Be sure that the corners are fi rmly seated. If the corners are not fi rmly
seated, the installation feet may be bent.
• When using cushion pads, be sure that the full width of the unit is covered.
• The projecting length of the anchor bolt should be less than 25 mm.
[Fig. 7.1.2] (P.2)
A Screws
• The detachable leg can be removed at the site.
• Detaching the detachable leg
Loosen the three screws to detach the detachable leg (Two each in the front
and back).
If the base leg fi nish is damaged when detaching, be sure to repair at the
site.

8. Water pipe installation

City Multi WY/WR2 Series pipes are similar to other air-conditioning pipes,
however, please observe the following precautions during installation.

8.1. Precautions during installation

• The water pressure resistance of the water pipes in the heat source unit is
2.0MPa.
• Use the reverse-return method to insure proper pipe resistance to each unit.
• Provide some joints and bulbs around inlet/outlet of each unit for easy
maintenance, checkup, and replacement.
• In order to protect the heat source unit, install a strainer on the circulating
water inlet pipe within 1.5 m from the heat source unit.
• Install a suitable air vent on the water pipe. After sending water through the
pipe, be sure to vent the excess air.
• Compressed water may form in the low-temperature sections of heat source
unit. Use a drainage pipe connected to the drain valve at the base of the unit
to drain the water.
• Install a back fl ow-prevention valve on the pump and a fl exible joint to
prevent excess vibration.
• Use a sleeve to protect the pipes where they go through a wall.
• Use metal fi ttings to secure the pipes, and install them so that they have
maximum protection against breakage and bending.
• Do not confuse the water intake and outlet valves.
• This unit doesn't have any heater to prevent freezing within tubes. When the
water fl ow is stopped on low ambient, take out the water from tubes.
• The unused knockout holes should be closed and the opening of refrigerant
pipes, water pipes, power source and transmission wires should be fi lled
with putty and so on to prevent from rain. (fi eld construction)
18
<B> With detachable leg
Check that the corner of the
B
installation leg is securely supported
to prevent the leg from bending.
Detachable leg
D
Caution:
Be very careful when carrying/moving the product.
- When installing the heat source unit, suspend the unit at the specifi ed location
of the unit base. Stabilize as necessary so that it does not move to the side
and support it at 4 points. If the unit is installed or suspended with 3-point
support, the unit may become unstable and fall.
Warning:
• Be sure to install unit in a place strong enough to withstand its weight.
Any lack of strength may cause unit to fall down, resulting in a
personal injury.
• Have installation work in order to protect against strong winds and
earthquakes.
Any installation defi ciency may cause unit to fall down, resulting in a
personal injury.
When building the foundation, give full attention to the fl oor strength, drain water
disposal <during operation, drain water fl ows out of the unit>, and piping and
wiring routes.
Precautions when routing the pipes and wires below the unit (Without
detachable leg)
When routing the pipes and wires below the unit, be sure that the foundation and
base work do not block the base through-holes. Also make sure the foundation
is at least 100 mm high so that the piping can pass under the unit.

7.2. Service space

• Please allow for the following service spaces after installation.
• In case of single installation, 600 mm or more of back space as front space
makes easier access when servicing the unit from rear side.
[Fig. 7.2.1] (P.3)
Space for removing the control box
A
Service space (front side)
C
• The drain plug is installed on the unit rear at factory shipment for fi eld-
connection of the drain pipes on the front of the unit. Relocate the plug to the
unit front to connect the drain pipes on the back of the unit. Check that there
are no leaks from pipe connections.
• For 2-unit combination, install water pipes in parallel to each other so that
the water fl ow rate through both units will be equal.
• Wrap the sealing tape as follows.
1 Wrap the joint with sealing tape in the direction of the threads
(clockwise), and do not let the tape run over the edge.
2 Overlap the sealing tape by two-thirds to three-fourths of its width on
each turn. Press the tape with your fi ngers so that it is pressed fi rmly
against each thread.
3 Leave the 1.5th through 2nd farthest threads away from the pipe end
unwrapped.
• Hold the pipe on the unit side in place with a spanner when installing the
pipes or strainer. Tighten screws to a torque of 150 N . m.
• Be aware of the following for water pressure of 1.0 to 2.0MPa.
1 When installing water piping, apply liquid sealing material over the
sealing tape and 1 or 2 pitch from the screw.
2 If the outdoor ambient temperature is below 10ºC, use hardening
accelerator.
3 Before applying the liquid sealing material, make sure to degrease the
screw hole.
4 Use of liquid sealing material with the following property is
recommended.
Liquid sealing material property
Viscosity [Pa·s (cP)] 25(25000)
Specifi c gravity 1.15
Heat source unit
B