Mitsubishi Electric PUHZ-W85VHA2 User manual

SERVICE MANUAL
AIR TO WATER HEAT PUMP
No. OCH465
CONTENTS
1. SAFETY PRECAUTION...........................................2
2. SPECIFICATIONS......................................................5
3. DATA ..............................................................................7
4. OUTLINES AND DIMENSIONS............................9
5. WIRING DIAGRAM..................................................10
6. WIRING SPECIFICATIONS..................................11
7. REFRIGERANT SYSTEM DIAGRAM....................12
8. TROUBLESHOOTING............................................13
9. DISASSEMBLY PROCEDURE............................42
August 2009
Note:
•This manual describes only
service data of outdoor unit.
•RoHS compliant products have
<G> mark on the spec name plate.
R410A
PUHZ-W85VHA2.UK
PUHZ-W85VHA2-BS.UK
PARTS CATALOG (OCB465)
[Model name]
PUHZ-W85VHA2
PUHZ-W85VHA2-BS
[Service Ref.]
PUHZ-W85VHA2.UK
PUHZ-W85VHA2-BS.UK

2
SAFETY PRECAUTION
1
Cautions for units utilizing refrigerant R410A
1-2. CAUTIONS RELATED TO NEW REFRIGERANT
1-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuits must be disconnected.
Charge refrigerant from liquid phase of gas cylinder.
If the refrigerant is charged from gas phase, composition change may occur in refrigerant and the efficiency
will be lowered.
Do not use refrigerant other than R410A.
If other refrigerant (R22 etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil etc.
Use a vacuum pump with a reverse flow check valve.
Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc.
Use the following tools specifically designed for use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant.
Handle tools with care.
If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction
of compressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered.
Electronic refrigerant
charging scale
Vacuum pump adaptor
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R410A
Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.

3
[1] Cautions for service
(1) Perform service after recovering the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
[2] Additional refrigerant charge
When charging directly from cylinder
· Check that cylinder for R410A on the market is syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name Specifications
1Gauge manifold · Only for R410A
· Use the existing fitting specifications. (UNF1/2)
· Use high-tension side pressure of 5.3 MPa·G or over.
2Charge hose · Only for R410A
· Use pressure performance of 5.09 MPa·G or over.
3Electronic scale —
4Gas leak detector · Use the detector for R134a, R407C or R410A.
5Adaptor for reverse flow check · Attach on vacuum pump.
6Refrigerant charge base —
7Refrigerant cylinder · Only for R410A Top of cylinder (Pink)
Cylinder with syphon
8Refrigerant recovery equipment —

4
Although "-BS" model has been designed to be resistant to salt damage, observe the following precautions to maintain the
performance of the unit.
1. Avoid installing the unit in a location where it will be exposed directly to seawater or sea breeze.
2. If the cover panel may become covered with salt, be sure to install the unit in a location where the salt will be washed away by
rainwater. (If a sunshade is installed, rainwater may not clean the panel.)
3. To ensure that water does not collect in the base of the outdoor unit, make sure that the base is level, not at angle. Water
collecting in the base of the outdoor unit could cause rust.
4. If the unit is installed in a coastal area, clean the unit with water regularly to remove any salt build-up.
5. If the unit is damaged during installation or maintenance, be sure to repair it.
6. Be sure to check the condition of the unit regularly.
7. Be sure to install the unit in a location with good drainage.
1-4. PRECAUTIONS FOR SALT PROOF TYPE "-BS" MODEL
1-3. CAUTIONS FOR REFRIGERANT PIPING WORK
Tools for R410A (The following table shows whether conventional tools can be used or not.)
Gauge manifold
Charge hose
Gas leak detector
Refrigerant recovery equipment
Refrigerant cylinder
Safety charger
Charge valve
Vacuum pump
Bender
Pipe cutter
Welder and nitrogen gas cylinder
Refrigerant charging scale
Vacuum gauge or thermis-
tor vacuum gauge and
vacuum valve
Charging cylinder
Air purge, refrigerant charge
and operation check
Gas leak check
Refrigerant recovery
Refrigerant charge
Prevent compressor malfunction
when charging refrigerant by
spraying liquid refrigerant
Prevent gas from blowing out
when detaching charge hose
Vacuum drying and air
purge
Bend the pipes
Cut the pipes
Weld the pipes
Charge refrigerant
Check the degree of vacuum. (Vacuum
valve prevents back flow of oil and refri-
gerant to thermistor vacuum gauge)
Refrigerant charge
Tool exclusive for R410A
Tool exclusive for R410A
Tool for HFC refrigerant
Tool exclusive for R410A
Tool exclusive for R410A
Tool exclusive for R410A
Tool exclusive for R410A
Tools for other refrigerants can
be used if equipped with adap-
ter for reverse flow check
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants
can be used
Tool exclusive for R410A
Tools and materials Use R410A tools Can R22 tools be used?
(Usable if equipped
with adapter for rever-
se flow)
Can R407C tools be used?
(Usable if equipped
with adapter for rever-
se flow)
: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.)
: Tools for other refrigerants can be used under certain conditions.
: Tools for other refrigerants can be used.

5
SPECIFICATIONS
2
2-1. SPECIFICATIONS
PUHZ-W85VHA2.UK PUHZ-W85VHA2-BS.UK
noitidnocgnitarepolanimoN)ycneuqerF,egatloV,esahP(ylppusrewoP
Nominal water flow rate (Heating mode) L/min Heating(A7/W35)
Heating 7+)blub-yrD(erutarepmetriaedistuOWkyt
icapaC 㷄
(A7/W35) 6+)blub-teW(erutarepmetriaedistuOPOC 㷄
53+/03+)teltuo/telni(erutarepmetretaWWktupnirewoP 㷄
Heating Wkyti
capaC Heating(A2/W35)
(A2/W35) 2+)blub-yrD(erutarepmetriaedistuOPOC 㷄
1+)blub-teW(erutarepmetriaedistuOWktupnirewoP 㷄
Pressure difference (water circuit) 䇭)teltuo/t
elni(erutarepmetretaWaPk 䋭/+35㷄
Heating pump input (based on EN14511) kW Cooling(A35/W7)
53+)blub-yrD(erutarepmetriaedistuOnim/L)edomgnilooC(etarwolfretawlanimoN 㷄
Cooling 42+)blub-teW(erutarepmetriaedistuOWkyticapaC 㷄
(A35/W7) EER (COP) Water temperature (inlet/outlet) +12/+7㷄
Power input kW Cooling(A35/W18)
Cooling 53+)blub-yrD(erutarepmetriaedistuOWkyticapaC 㷄
(A35/W18) EER (COP) Outside air temperature (Wet-bulb) + 24㷄
81+/32+)teltuo/telni(erutarepmetretaWWktupnirewoP 㷄
Pressure difference (water circuit) 䇭kPa
Cooling pump input (based on EN14511) kW
Note: "Capacity", "COP" and "Power input" in the above table are values that contains the "pump input (based on EN 14511) ".
regnahcxetaehetalPsnoitacificepstinuroodtuO
Model name ALFA LAVAL
Running current Heating(A7/W35) 05-03HCAA
Cooling(A35/W7) A
Power factor Heating(A7/W35) mm4.04:A%
Cooling(A35/W7) mm2.862:B%
Atnerruc.xaM
mm39:WAezisrekaerB
mm523:HgnisacretuO
mm84:DhsiniflanretxE
setalp05lortnoctnaregirf
eR
Compressor
Model
Motor output kW
Start type
Protection devices
Maximum outlet water temperature
Oil (Model) L
WretaehesacknarC
Heat exchanger Air
Water
Fan Fan(drive)×No.
Fan motor output kW
Air flow m3/min
(CFM)
Defrost method
Noise level Heating dB
Cooling dB
Dimensions Width mm (in.)
Depth mm (in.)
Height mm (in.)
)sbl(gkthgieW
Refrigerant *1 Hot gas with 4-way valve
Quantity kg (lbs) *2 at distance of 1m from outdoor unit
Guaranteed operating Heating 㷄*3 grill
range (Outdoor) Cooling 㷄
Outlet water temp. Heating 㷄
(Max in heating, Min in cooling)
Cooling 㷄
Nominal return water Heating 㷄
temperature range Cooling 㷄
nim/LegnaretarwolfretaW
*4 With the optional air outlet guide, the operation at
-15°C outdoor temperature is possible.
48 *2
0.67 (FV50S)
943 (37-1/8)
R410A
(1,730)
Reverse cycle *1
Propeller fan × 1
0.060
10.0 䌾25.8
2.4 (5.3)
-20 䌾+35
-5*4
*5
䌾+46
+5 䌾+59
+8 䌾+28
+60
+5
(Min.2.60 䌾) 8.50
0.02
2.68
13.5
21.5
7.50
7.50
3.93
9.38
Galvanized plate
0.012
Hermetic twin rotary
13.15
PUHZ-W85VHA2(-BS)
25.8
79 (174)
950 (37-3/8)
330 +30*3 (13+1-3/16)
23.0
HP switch
Discharge thermo
Shell thermo
48 *2
-
1.3
1㱢, 230V, 50Hz
25
2.47
1.91
(Min.2.70 䌾) 9.00
4.18
3.04
10
2.15
3.17
TNB220FLHM1T
98
98
Linear expansion valve
Munsell 3Y 7.8/1.1
49
Plate fin coil
Plate heat exchanger
Inverter
W
H
D
Water OUT
Water IN
Ref. IN
(Heating)
Ref. OUT
(Heating)
Thermistor
(TH32)
A
B
40
45
50
55
60
65
-20 -15 -10 -5 0 5 10
Ambient temperature [㷄]
Maximum outlet water temperature [㷄]
(SPL)
*5 For details of the min. return water temperature at
each water flow rate, refer to the chapter 2-2.
Note: We confirm that our units are tested based on EN14511.

6
2-2. AVAILABLE RANGE (WATER FLOW RATE, RETURN WATER TEMP.)
Note: If the value of water flow rate and return water temp. become lower than the available range, it
could cause damage to the parts of unit.
<Heating>
Table 1
10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0
Water flow rate [L/min]
5.0
7.0
9.0
11.0
13.0
15.0
17.0
19.0
Return water temp []
<Applicable Models>
•PUHZ-W85VHA2(-BS)
<Applicable Models>
•PUHZ-W85VHA2(-BS)
12.010.0 14.0 16.0 20.0 22.0 24.0
Table 2
Water flow rate [L/min]
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
Return water temp []
18.0
Available range
Available range
<Cooling>

7
DATA
3
1.5m
1m
MICROPHONE
UNIT
GROUND
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
90
80
70
60
50
40
30
20
10
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 bar)
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
PUHZ-W85VHA2(-BS).UK
COOLING
MODE
HEATING
48
SPL(dB)
48
LINE
3-1. NOISE CRITERION CURVES

8
3-2. STANDARD OPERATION DATA
Mode
Cooling
(A35/W7) Heating (A7/W35)
Total
Capacity W 7,500 9,000
Input kW 3.04 2.15
Electrical circuit
Outdoor unit PUHZ-W85VHA2
Phase, Hz 1, 50
Voltage V 230
Current A 13.15 9.38
Refrigerant circuit
Discharge pressure MPa 2.81 2.16
Suction pressure MPa 0.73 0.64
Discharge temperature ºC 80 65
Condensing temperature ºC 46 37
Suction temperature ºC 3 -1
Water
conditions
Flow volume L/min 21.5 25.8
Outlet water temperature ºC 7 35
Outdoor
conditions
Intake air
temperature
D.B. ºC 35 7
W.B. ºC 24 6
The unit of pressure has been changed to MPa based on international SI system.
The conversion factor is: 1 (MPa) = 10.2 (kgf/cm²)
We confirm that our units are tested based on EN 14511.

9
OUTLINES AND DIMENSIONS
4
Unit: mm
PUHZ-W85VHA2(-BS).UK
Rear Air Intake
Side Air Intake
Air Discharge 2-12 x 36 oval holes
(Foundation Bolt M10)
2-U Shaped notched holes (Foundation Bolt M10)
Installation Feet
53
417
37028
175 175600
19
33030
Drain hole (5-:33)
30
81 219
220 145145145
Handle for moving
Side Air Intake
Handle for moving
Rear Air Intake
Water IN
Air Intake
Water OUT
Handle for moving
57
Power supply wiring hole (2-:27 knockout)
See Detail
Side Panel R
Front cover
34
40119
Detail
ISO 228/1-G1 B
98 269
24
Service panel
Handle for moving
Handle for moving
Terminal Connections Left...Power supply wiring Right...Controller wiring
Earth terminal
322
943
23
473
950
673
FOUNDATION
<Foundation bolt height>
Please secure the unit firmly with 4 foundation (M10) bolts. (Bolts and washers must be purchased locally.)
Service space
Dimensions of space needed for service access are shown in the below diagram.
FREE
Over 300mm
Over 10mm
The diagram below shows a basic example. Explanation of particular details are given in the installation manuals etc.
Over 500mm
Over 10mm
1 FREE SPACE (Around the unit) 2 SERVICE SPACE 3 FOUNDATION BOLTS
Less than
Over
Over
Over300
500
500
Over10
30

10
5WIRING DIAGRAM
PUHZ-W85VHA2.UK PUHZ-W85VHA2-BS.UK
TB1
MC
MF1
21S4
63H
TH3
TH4
TH6
TH7
TH8
LEV-A, LEV-B
DCL
Terminal Block <
Power Supply,Interface unit /
Flow temp. controller>
Motor for Compressor
Fan Motor
Solenoid Valve <Four-Way Valve>
High Pressure Switch
63HS High Pressure Sensor
SV Solenoid Valve <Bypass Valve>
Thermistor < Liquid>
Thermistor <Discharge>
Thermistor <Plate HEX Iiquid>
Thermistor <Ambient>
Thermistor <Heat sink>
TH32 Thermistor <Inlet water>
TH33 Thermistor <Comp Surface>
Electronic Expansion Valve
Reactor
ACTM Active Filter Module
CY1,CY2 Capacitor
Power Circuit Board
Connection Terminal
< U/V/W-Phase>
P. B .
TABS/T
Noise Filter Circuit Board
Connection Terminal
< L-Phase>
Connection Terminal
< Ground>
N.F.
LI,LO
Connection Terminal < N-Phase>
NI,NO
EI,E2
Controller Circuit Board
Connector
< Connection for Option>
Connector < Connection for Option(Contact Input) >
Switch < Function Switch>
Switch
< Function Switch>
Switch
< Function Switch>
Switch
< Function Switch>
SW1
SV1
CNDM
SW2
SW6
SW8
LED3
LED < Operation/Inspection Indicators>
C.B.
TABP1/P2
Power Module IPM
Diode bridge DS2, DS3
52C Relay
52C
SYMBOL NAME SYMBOL NAME
Connection Terminal < L/N-Phase>
Connection Terminal
< DC Voltage>
TABN1/N2
Connection Terminal < DC Voltage>
TABU/V/W
Switch < Model Select>
Switch
< Model Select>
SW5
SW10
Relay
Fuse
< T6.3AL250V>
F1 F4
X52,X54, X55
SW7
Switch < Function Switch>
MS
3
MF1
M
1
3
1
7
34 11121
17
2
CNF1
(WHT)
TRANS
CNDC
(PNK)
TH7/6
(RED)
TH3
(WHT)
TH4
(WHT)
TH7
t° t° t° t°
TH6 TH3 TH4
12
TH32
(BLK)
t°
TH32
12
TH33
(YLW)
t°
TH33 63HS
63HS
(WHT)
31
CNS
(WHT)
63H
(YLW)
3
1
63H
1
1
C. B.
P. B.
N. F.
SW6
SW1
SW8
SW2
SW5
SW10
LED3
2
22
7
CN2
(WHT)
F3
12 12
1313
13
2
71
1
2
1
2
1
2
7
6
CNAC
(WHT)
CN4
(WHT)
12
34
F4
F2
F1 21S4
(GRN)
SV2
(BLU)
X52 X55
13 SV1
(GRY)
X54
21S4 SV
2
2
LN
CNDC
(PNK)
DS2
DS3
TABN
TABP
IPM
U
TABP2
TABV
TABW
TABN2
TABN1
TABS
TABP1
TABT
TABU
MS
3
UVW
MC
CN2
(WHT)
41
CNAF
(WHT)
CN4
(WHT)
CN5
(RED)
CN3
(WHT)
RED
RED
WHT WHT
WHT
WHT BLK
BLU
RED
BLU
BRN
ORN
YLW
GRN/YLW
BLK
TH8
t°
1613
15
CNVMNT
(WHT)
CNMNT
(WHT)
LEV-A
(WHT)
LEV-A
1
5
CN51
(WHT)
1
3
CNDM
(WHT)
1
3
CN3S
(WHT)
DCL
ACTM
L1
LO
52C
NO
LI NI
CN5
(RED)
L2
N2
Io
N1
P
4
16
RED
BLK
BLK
BLK
RED
WHT
RED
BLU
CNAC2
(RED)
CNAC1
(WHT)
CN52C
(BLK)
WHT
2
2
1
3
E2
EI
U
U
1
2
1
2
3
1
TB1
CY1
CY2
S1 S2 S3
RED
POWER SUPPLY
/ N 230V 50Hz
Interface unit /
Flow temp. controller
M
61
LEV-B
(RED)
CN52C
(RED)
LEV-B
BLU
WHT
001011
123456
SW6
1 MODEL SELECT
1=ON, 0=OFF
01
12
SW10
SW7