Mitsubishi Electric PLFY-WP VBM-E, Data Book

Page: 164 / 192

3 - 11
S.D. R2
MEE15K052
3. Piping Design
• Insulation materials for the pipes to be added on site must meet the following specifications:
• 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.
3-2-3-2 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.
Seal unused end connections using cover caps (field supply, dezincification resistant brass (DZR) or bronze only). Not replacing
the rubber end caps 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 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.
Locally procured insulating
material for pipes
Bind here using band or tape.
HBC controller
-indoor unit
20 mm or more
Insulating material
(field supply)
Lap margin:
more than 40 mm
Do not leave any opening.
Unit side insulating material
• Install an expansion tank to accommodate expanded water.
• The maximum water temperature is 60°C.
• The minimum water temperature is 5°C.
• The circuit protection valve set pressure is 370-490kPa.
• The circulation pump head pressure is 0.24MPa.
• The water containment volume of the HBC, the indoor units, and pipe work.
4. Expansion vessel
(Unit: L)
Unit model Water volume
CMB-WP108V-GA1
PEFY-WP20VMA
PEFY-WP15VMS1
PEFY-WP20VMS1
PEFY-WP25VMS1
PEFY-WP32VMS1
PEFY-WP40VMS1
PEFY-WP50VMS1
0.7
0.7
10
13
5
9
1.7
0.9
1.0
PEFY-WP25VMA
1
PEFY-WP32VMA
PEFY-WP40VMA
1.8
1.5
PEFY-WP50VMA
CMB-WP1016V-GA1
CMB-WP108V-GB1
CMB-WP1016V-GB1
PLFY-WP32VBM-E
PLFY-WP40VBM-E
PLFY-WP50VBM-E
PFFY-WP20VLRMM-E 0.9
1.3
PFFY-WP25VLRMM-E
PFFY-WP32VLRMM-E
PFFY-WP40VLRMM-E
1.5
PFFY-WP50VLRMM-E
Expansion vessel selection criteria:
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