Center Of Gravity And Product Weight; Connecting Drain Pipe; Drain Pipe; Drain Piping Work - Mitsubishi Electric City Multi PFFY-WP20-VLRMM-E Installationshandbuch

For PFFY-WP-VLRMM-E
Model name
20
25 · 32
40 · 50
Note:
When fixing on the wall, fix the unit with the electrical parts removed from
the unit.

5. Connecting drain pipe

5.1. Drain pipe

[Fig. 5.1.1] (P.3)
A Main drain pan
C Hose (accessory) (External diameter ø 27 (end ø 20))

5.2. Drain piping work

1. Ensure that the drain piping is downward (pitch of more than 1/100) to the
outdoor (discharge) side. Do not provide any trap or irregularity on the way.
2. Ensure that any cross-wise drain piping is less than 20 m (excluding the dif-
ference of elevation). If the drain piping is long, provide metal braces to pre-
vent it from waving. Never provide any air vent pipe. Otherwise drain may be
ejected.
3. Put the supplied strainer at the bottom of the sub drain pan on the side of
the body frame, and connect the supplied drain hose to the end connection.
Tighten this end connection using the supplied hose hand.
4. Use a VP30 pipe or equivalent for collecting pipe if it is needed, and pipe it
giving a downward pitch of more than 1/100.

6. Connecting water pipes

Please observe the following precautions during installation.
6.1. Important notes on water pipework
installation
• The water pressure resistance of the water pipes in the heat source unit is
1.0 MPa [145 psi].
• Please connect the water pipework of each indoor unit to the connect port on
the HBC. Failure to do so will result in incorrect running.
• Please list the indoor units on the naming plate in the HBC unit with address-
es and end connection numbers.
• If the number of indoor units are less than the number of ports on the HBC,
the unused ports can be capped. Without a cap, water will leak.
• 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 main-
tenance, checkup, and replacement.
• Install a suitable air vent on the water pipe. After flowing water through the
pipe, vent any excess air.
• Secure the pipes with metal fitting, positioning them in locations to protect
pipes against breakage and bending.
• Do not confuse the water intake and outlet piping. Error code 5102 will ap-
pear on the remote controller if a test run is performed with the pipe-work
installed incorrectly (inlet connected to outlet and vice versa).
• This unit doesn't include a heater to prevent freezing within tubes. If the wa-
ter flow is stopped on low ambient, drain the water out.
• The unused knockout holes should be closed and the refrigerant pipes, water
pipes, power source and transmission wires access holes should be filled
with putty.
• Install water pipe so that the water flow rate will be maintained.
• Wrap sealing tape as follows.
1 Wrap the joint with sealing tape following the direction of the threads
(clockwise), do not wrap the tape 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 fingers so that it is tight against each thread.
3 Do not wrap the 1.5th through 2nd farthest threads away from the pipe
end.
(mm)
(E) (F)
1050 640
1170 760
1410 1000
B Sub drain pan

4.2. Center of gravity and product weight

[Fig. 4.2.1] (P.2)
A Floor hole for fixing
For PFFY-WP-VLRMM-E
Model name W
PFFY-WP20VLRMM-E 640
PFFY-WP25VLRMM-E 760
PFFY-WP32VLRMM-E 760
PFFY-WP40VLRMM-E 1000
PFFY-WP50VLRMM-E 1000
5. Provide sufficient insulation just as for water piping.
6. Check that the water supply tube is installed in the sub drain pan.
[Fig. 5.2.1] (P.3)
A Indoor unit
C Sub drain pan
E Drain hose (accessory)
Caution:
Pipe the drain piping to ensure that it discharges drain, and insulate it to
prevent dew condensation. A failure to the piping work may cause water
leakage and so wet your property.
• Hold the pipe on the unit side in place with a spanner when installing the
pipes or strainer. Tighten screws to a torque of 40 N·m.
• If there is a risk of freezing, carry out a procedure to prevent it.
• When connecting heat source unit water piping and on site water piping, ap-
ply liquid sealing material for water piping over the sealing tape before con-
nection.
• Do not use steel pipes as water pipes.
- Copper pipes are recommended.
• Install a strainer (40 mesh or more) on the pipe next to the valve to remove
the foreign matters.
• Be sure to provide anti-dew condensation treatment on the inlet and outlet
of the water pipes and on the valve. Provide an appropriate treatment on the
end surface of the dew proofing material to keep condensation out.
• When water has been supplied to the water pipework, purge the system of
air. The details of air purging can be found separately in the water circuit
maintenance manual.

6.2. Water pipe insulation

1. Connect the water pipes of each indoor unit to the same (correct) end con-
nection numbers as indicated on the indoor unit connection section of each
HBC controller. If connected to wrong end connection numbers, there will be
no normal operation.
2. List indoor unit model names in the name plate on the HBC controller control
box (for identification purposes), and HBC controller end connection numbers
and address numbers in the name plate on the indoor unit side.
Seal unused end connections using cover caps (sold separately). Not replac-
ing on end cap will lead to water leakage.
3. Be sure to add insulation work to water piping by covering water pipework
separately with enough thickness heat-resistant polyethylene, so that no gap
is observed in the joint between indoor unit and insulating material, and in-
sulating materials themselves. When insulation work is insufficient, there is a
possibility of condensation, etc. Pay special attention to insulation work in the
ceiling plenum.
L X Z Product Weight (kg)
100 17 335 22
100 17 335 25
100 17 335 25
100 17 335 29
100 17 335 29
B Strainer (accessory)
D Hose band (accessory)
F Water supply tube
(mm)
7