Mitsubishi Electric PUHZ-W50VHA Technical Manual page 90

6 Requirements
6-1. For functional parts
6-1-1. Thermistor position
Refer to section 4. Interface or 5. Flow temp. controller for detail.
(1) I / F : PAC-IF011B-E (cased), PAC-IF010-E (PCB only)
Application Capacity Control
By external STEP
Air to Water
signals
"By external STEP
signals"
Air to Air
Calculate by I / F
Fixed resistor value : 4~10kΩ
*1. If the outdoor unit is ZUBADAN series, Terminal "TH5" can be opened.
(2) FTC : PAC-IF021B-E (cased), PAC-IF020-E (PCB only)
Application Capacity Control
"By external STEP
Air to Water signals"
Calculate by I / F
PAC-IF011B-E/PAC-IF021B-E (cased) contains 2 thermistors.
PAC-IF010B-E/PAC-IF020B-E (PCB only) doesn't contain thermistor.
Please purchase locally optional parts PAC-TH010-E ("Thermistor, 5m × 2pcs " 10set).
PACKAGED type outdoor unit
Water OUTLET side
TH1
Outdoor unit
*1
Water piping
6-1-2. Mounting PCB (PCB only, uncased type)
• To comply with the required regulations and directives by your side.
e.g) CE marking
• Fire safty : PCB must be enclosed by sheet metal.
• Ambient temperature : 0:~ 60:
• Do not install it outdoors.
6-2. For application
• Piping material/water fl ow velocity
• To prevent freezing
• Water quality
• Primary / secondary water
Refer to 2-2-2 [6] Notifi cation to design / select HEX (Refrigerant - Water)
Terminal "TH1"
Water HEX
target temp.
Packaged Fixed resistor
Split Fixed resistor
Split Fixed resistor
Split CONNECT
Terminal "TH1"
Water HEX
target temp.
CONNECT
Packaged
Split CONNECT
SPLIT type outdoor unit
FTC
Outdoor unit
TH2:
not necessary
TH2
Terminal "TH2"
Pipe temp./Liquid
Fixed resistor
CONNECT
CONNECT
CONNECT
Terminal "TH2"
Pipe temp./Liquid
Open
CONNECT
Refrigerant LIQUID side
Refrigerant piping
90
Terminal "TH5"
Pipe temp./2-phase
Open
Open
CONNECT *1
CONNECT *1
Terminal "TH5"
Pipe temp./2-phase
Open
Open
Water OUTLET side
FTC
TH1
TH2
*1
Water piping