4
en
2. Installation location
2.5. Connecting a Cylinder (EHST20C) or Hydrobox (EHSC) unit
When connecting a Cylinder or Hydrobox unit, be aware of the following points because the Cylinder and Hydrobox unit are different from other indoor units.
2.5.1. Connection restrictions
• Only 1 Cylinder (EHST20C) or 1 Hydrobox (EHSC) unit can be connected (C generation or later).
(EHST20C-MEC, EHST20D series, EHPT20X series, EHSD series, EHSC-MEC, ERSD series, ERSC series and EHPX series cannot be connected.)
• When connecting ecodan systems, use a PAC-MK32/52/33/53/34/54BC(B) branch box. (A PAC-MK31/51BC(B) branch box cannot be used.)
• PWFY units cannot be connected at the same time as a Cylinder or Hydrobox unit.
• ATA indoor units*1 with a total rated capacity of 50% – 130% of the outdoor unit capacity and 1 Cylinder or 1 Hydrobox unit can be connected.
*1 ATA indoor unit: An indoor unit excluding a PWFY, Cylinder unit, and Hydrobox unit.
PUMY-P112 1 Cylinder or 1 Hy ATA indoor units [max 16.2 (1.3*
2
) kW]
PUMY-P125 1 Cylinder or 1 Hy ATA indoor units [max 18.2 (2.8*
2
) kW]
PUMY-P140 1 Cylinder or 1 Hy ATA indoor units [max 20.2 (4.3*
2
) kW]
*2 In case of the operating a Cylinder or Hydrobox unit in Heating mode / DHW mode and operating ATA indoor units at the same time.
However, the following combinations can be connected.
∙ PUMY-P112: MSZ-SF15VE or MSZ-AP15VF × 1
∙ PUMY-P125: MSZ-SF15VE or MSZ-AP15VF × 2
∙ PUMY-P140: MSZ-SF15VE or MSZ-AP15VF × 3
2.5.2. Indoor unit specifications
When connecting a Cylinder or a Hydrobox unit, the following specifications will change.
• The Cylinder or Hydrobox unit cannot operate in cooling mode.
• The operation mode of the Cylinder or Hydrobox unit always has priority.
• The DHW operation eco mode cannot be used.
• Maximum flow temperature is 55
°
C. (Dip SW1-2 on the Cylinder or Hydrobox unit must be changed to OFF.)
• Energy monitoring can be used only when an external power meter is connected.
• Multiple outdoor units cannot be controlled.
• A Cylinder or Hydrobox unit cannot be connected to an M-NET remote controller and a centralized controller.
• Boiler interlock can be used only when switching to the outside air temperature.
• A Cylinder or Hydrobox unit cannot be grouped with an ATA indoor unit.
• In case of the operating a Cylinder or Hydrobox unit in the
Heating mode
and operating ATA indoor units at the same time, be aware of the following points.
∙ Heating flow temperature range of Cylinder or Hydrobox unit is 45°C - 55°C.
Please set the flow temperature range in reference to the Cylinder or Hydrobox installation Manual.
∙ The outdoor temperature must be −10°C or more. When the outdoor temperature is less than 7°C, the flow temperature and blow off temperature are lowered.
• When operating a Cylinder or Hydrobox unit in the
DHW mode
and operating ATA indoor units at the same time, the outdoor temperature must be 7°C or more.
When the outdoor temperature is less than 7°C, they cannot operate at the same time.
2.5.3. Switch settings
When connecting a Cylinder or Hydrobox unit to a PUMY unit, set the DIP switch SW1-2 on Cylinder or Hydrobox unit to OFF.
2.5.4. Test run
Perform the test run for the Cylinder or Hydrobox unit from the indoor unit.
(For details about the test run, refer to the installation manual for the Cylinder or Hydrobox unit.)
2.5.5. Refrigerant collecting (Pump down)
Perform the procedures in 7.3.
* Do not use the DipSW functions of outdoor unit.
2.6. Connecting a cooling-only indoor unit
If a system includes one or more cooling-only indoor units, set the entire system as a cooling system.
Set the units as indicated in table 4.
Table 4 Cooling-only setting procedure
Unit
Setting
Outdoor unit
PUMY-P∙VKM5/YKM(E)4 DIP switch SW2-6 on multi-controller circuit board: ON
Branch box
PAC-MK∙BC
DIP switch SW4-5 on branch box controller circuit board: ON
Indoor unit
CITY MULTI series
DIP switch SW3-1 on indoor unit controller circuit board: ON
M, S, P series
Setting is not necessary.
2.7. Connecting a PEFY-P∙VMA3-E
When using a PEFY-P∙VMA3-E, use the following combinations for the connected indoor units.
PUMY-P112
PUMY-P125
PUMY-P140
OK
PEFY-P25VMA3-E × 2
+
PEFY-P32VMA3-E × 2
PEFY-P32VMA3-E × 4
PEFY-P32VMA3-E × 3
+
PEFY-P40VMA3-E × 1
NO
All combinations excluding the above
combinations
All combinations excluding the above
combinations
All combinations excluding the above
combinations
Ex. 1: PEFY-P25VMA3-E × 2
+
PEFY-P32VMA-E × 2
Ex. 2: PEFY-P25VMA3-E × 2
+
PEFY-P32VMA3-E × 1
Ex. 3: PEFY-P32VMA3-E × 4
(A combination for a PUMY-P125)
Ex. 4: PEFY-P25VMA3-E × 2
+
PEFY-P32VMA3-E × 2
+
MSZ-FH25VE × 1
Ex. 1: PEFY-P32VMA3-E × 3
+
PEFY-P32VMA-E × 1
Ex. 2: PEFY-P32VMA3-E × 3
Ex. 3: PEFY-P25VMA3-E × 2
+
PEFY-P32VMA3-E × 2
(A combination for a PUMY-P112)
Ex. 4: PEFY-P32VMA3-E × 3
+
PLFY-P20VFM-E × 1
+
SEZ-KD25VA × 1
Ex. 1: PEFY-P32VMA3-E × 3
+
PEFY-P40VMA-E × 1
Ex. 2: PEFY-P32VMA3-E × 2
+
PEFY-P40VMA3-E × 1
Ex. 3: PEFY-P32VMA3-E × 4
(A combination for a PUMY-P125)
Ex. 4: PEFY-P32VMA3-E × 3
+
PCFY-P40VKM-E × 1
+
MSZ-SF15VA × 1
Ex. 1: A ceiling-concealed unit other than a VMA3 series is selected. Combinations
with a ceiling-concealed different series are not possible.
Ex. 2: The number of units is incorrect.
Ex. 3: The combination is for a unit with a different capacity.
Ex. 4: The combination is not an “OK” combination.
2.8. Connecting a PLFY-EP∙VEM-E
For the PLFY-EP
∙
VEM-E, up to 2 units can be connected.
Other indoor units*1 can be connected within the total rated capacity and maximum number of connected units.
*1 Excluding the PEFY-P
∙
VMA3-E and PEFY-P
∙
VMH-E-F.
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