Mitsubishi Electric CITY MULTI CMB-WP108NU-AA Manual De Instalación página 10

[Fig. 5.1.3]
A
C
D
E F
A HBC controller
C To Sub-HBC controller (Hot water)
E To Sub-HBC controller (Cold water)
5.2. Water pipe insulation
1. Connect the water pipes of each indoor unit to the same (correct) end connection
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.
In case of using cover caps for unused end connections, please use dezincification resist-
ant brass (DZR) (field supply). Not using the rubber end caps will lead to water leakage.
3. Be sure to add insulation work to water piping by covering water pipework sepa-
rately with enough thickness heat-resistant polyethylene, so that no gap is
observed in the joint between indoor unit and insulating material, and insulating
materials themselves. When insulation work is insufficient, there is a possibility of
condensation, etc. Pay special attention to insulation work in the ceiling plenum.
[Fig. 5.2.1]
C
B
A
D
F
E
A Locally procured insulating material for pipes
B Bind here using band or tape.
D Lap margin: more than 40 mm [1-5/8 in] E Insulating material (field supply)
F Unit side insulating material
• Insulation materials for the pipes to be added on site must meet the following
specifications:
HBC controller
20 mm [13/16 in] or more
-indoor unit
HBC controller
20 mm [13/16 in] or more
-Sub-HBC controller
• This specification is based on copper for water piping. When using plastic
pipework, choose a thickness based on the plastic pipe performance.
• Installation of pipes in a high-temperature high-humidity environment, such as
the top floor of a building, may require the use of insulation materials thicker than
the ones specified in the chart above.
• When certain specifications presented by the client must be met, ensure that
they also meet the specifications on the chart above.
4. Expansion vessel
• Install an expansion vessel to accommodate expanded water.
• Please install expansion vessel at same height level of HBC controller.
Expansion vessel selection criteria:
• The water containment volume of the HBC controller and the indoor unit.
Unit model
HBC controller
PEFY-WL06NMAU
PEFY-WL08NMAU
PEFY-WL12NMAU
PEFY-WL15NMAU
PEFY-WL18NMAU
PEFY-WL24NMAU
PEFY-WL27NMAU
PEFY-WL30NMAU
PEFY-WL36NMAU
PEFY-WL48NMAU
* For other indoor units, refer to the installation manual for each.
10
B
B Sub-HBC controller
D From Sub-HBC controller (Hot water)
F From Sub-HBC controller (Cold water)
C Do not leave any opening.
(Unit: L)
Water volume
10
0.9
1.2
2.1
2.7
3.7
• The maximum water temperature is 60°C [140°F].
• The minimum water temperature is 5°C [41°F].
• The circuit protection valve set pressure is 370-490kPa.
• The circulation pump head pressure is 0.24MPa.
• The design pressure of the expansion vessel is the charged water pressure
(the reading of the pressure gauge).
• Tank volume of expansion vessel is as follows:
Tank volume = ε × G/(1 - (Psupply + 0.1)/0.29) × 1.2
ε = The expansion coefficient of water
(= 0.0171)
* Please choose ε for using antifreeze solution on the type and temperature range
used.
ε = Max density/Min density - 1
G [L] = (HBC controller [L] + Indoor unit [L] + Pipe [L]) × 1.1
Psupply: Water supply pressure [MPa]
5. Leakproof the water pipework, valves and drain pipework. Leakproof all the way
to, and include pipe ends so that condensation cannot enter the insulated pipe-
work.
6. Apply caulking around the ends of the insulation to prevent condensation getting
between the pipework and insulation.
7. Add a drain valve so that the unit and pipework can be drained.
8. Ensure there are no gaps in the pipework insulation. Insulate the pipework right
up to the unit.
9. Ensure that the gradient of the drain pan pipework is such that discharge can
only blow out.
10. HBC controller water pipe connection sizes and pipe sizes.
[Fig. 5.2.2]
Connection size
Model name
Water inlet
PEFY-WL06-18
NMAU-A
O.D. 22 mm
PEFY-WL24-48
NMAU-A
* For other indoor units, refer to the indoor unit installation manual.
* The pipe diameter depends on the capacity of indoor units.
Refer to the indoor unit installation manual for details.
[Fig. 5.2.3]
Total down-stream
Pipe size between Main-HBC and Sub-HBC
indoor unit capacity
WL06 - WL36
WL37 - WL72
WL73 - WL108
WL109 - WL144
WL145 - WL180
WL181 - WL200
A
C
B
J
K
J
H
J
E E E
L M
1 2 3 4 5 6
Fig. A
L
1 2 3
Fig. B
A To outdoor unit
B End connection (brazing)
C Main-HBC controller
D Sub-HBC controller
E Indoor unit
F Branch joint (field supply)
G Up to three units for 1 branch hole; total capacity: below 30 (but in same mode,
cooling/heating)
H Shutoff valve (field supply)
I Pressure control valve (field supply)
J Auto air vent valve (Highest point on the water pipe for each branch) (field supply)
K Water pipework
L Pump 1 circuit
M Pump 2 circuit
Pipe size
Water outlet Water out Water return
I.D. ≥ 20 mm I.D. ≥ 20 mm
[13/16 in] [13/16 in]
O.D. 22 mm
I.D. ≥ 30 mm I.D. ≥ 30 mm
[1-3/16 in] [1-3/16 in]
I.D. ≥ 20.0 mm
I.D. ≥ 25.8 mm
I.D. ≥ 30.0 mm
I.D. ≥ 33.3 mm
I.D. ≥ 36.2 mm
I.D. ≥ 36.8 mm
D
F
J
I
E E E
G
L M
7 8 9 10 11 12 13 14 15 16
M
4 5 6 7 8