Mitsubishi Electric PAC-SIF051B-E, Инструкция по установке и эксплуатации

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3. System
Parts name Requirement
Flow switch It is required to protect system from the effects of insufficient flow.
Flow sensor It is required to detect an error in flow rate.
(The operation is validated with GRUNDFOS VFS5-100.)
It is required for Energy monitor function.
Strainer /Magnetic filter
(water circuit)
Provide it as required to protect parts from damages caused by iron particles/water/contamination (e.g. the position before pump and return
part from emitters).
Pressure relief valve
(Primary circuit side)
(Sanitary water side)
It is required to protect system from reaching high pressure.
Select the operating pressure depending on water pressure in the circuit in normal use.
Note: Follow the national regulations.
3-way valve Current: 0.1A Max. (If over 0.1A you must use a relay)
Power supply: 230V AC
Connect earth cable, if there is one.
Type: SPST
Note: SPDT type can NOT be used.
2-way valve Current: 0.1A Max. (If over 0.1A you must use a relay)
Power supply: 230V AC
Connect earth cable, if there is one.
Type: Normally closed
Select the 2-way valve that slowly opens and shuts off to prevent water hammer.
A by-pass valve or circuit should be installed between pump and 2-way valve for safety (to release pressure when the both 2-way valves are closed).
Select a 2-way valve equipped with manual override, which is necessary for topping up or draining of water.
Water circulation pump Current: 1.0A Max., Power supply: 230V AC
When connecting a pump with an electric current of 1A or multiple pumps, please note the following.
1. Use (a) relay(s).
2. When power is supplied from outdoor unit, TOTAL current (including the other parts) requirement MUST be 3A. (otherwise, the fuse on
the outdoor unit PCB will blow. )
3. When independent power supplies (i.e. from the FTC unit itself) , total current for the pump(s) is 4A. (otherwise, the fuse on the FTC
PCB will blow. )
Connect earth cable, if there is one.
Adjust the pump speed setting so that the flow rate in the primary circuit is appropriate for the outdoor unit installed see the table and figures below.
Outdoor heat pump unit Water flow rate range [L/min]
Packaged model PUHZ-W50 6.5 - 14.3
PUHZ-W85 10.8 - 25.8
PUHZ-W112 14.4 - 32.1
PUHZ-HW112 14.4 - 32.1
PUHZ-HW140 17.9 - 40.1
Split model SUHZ-SW45 7.1 - 12.9
PUHZ-SW40 7.1 - 11.8
PUHZ-SW50 7.1 - 17.2
PUHZ-FRP71 11.5 - 22.9
PUHZ-SW75 9.5 - 22.9
PUHZ-SW100 13.0 - 32.1
PUHZ-SW120 17.9 - 45.9
PUHZ-SW160 23.0 - 63.1
PUHZ-SW200 28.7 - 71.7
PUHZ-SHW80 10.2 - 22.9
PUHZ-SHW112 14.4 - 32.1
PUHZ-SHW140 17.9 - 40.1
PUHZ-SHW230 28.7 - 65.9
* The water velocity in pipes should be kept within certain limits of material to avoid erosion corrosion and excessive noise generation.
(e.g. Copper pipe: 1.5m/s)
Continue to the next page.
3.4 Fourth step (Functions setting)
* Make sure to check the followings for your safety when designing a system. These are the minimum requirement for the safe use of FTC unit.
N L
4 5 6
3-way valve
SPST type
N L
4 5 6
3-way valve
motor motor
SPDT type
TBO. 2