Mitsubishi Electric PUMY-P60NKMU1 Operating manual

PARTS CATALOG (OCB613)
CONTENTS
1. SAFETY PRECAUTION .....................................2
2. OVERVIEW OF UNITS.......................................5
3. SPECIFICATIONS ............................................10
4. DATA.................................................................11
5. OUTLINES AND DIMENSIONS .......................24
6. WIRING DIAGRAM...........................................25
7. NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION....... 26
8. TROUBLESHOOTING......................................36
9. ELECTRICAL WIRING................................... 111
10. REFRIGERANT PIPING TASKS....................116
11. DISASSEMBLY PROCEDURE.......................120
No. OCH613
REVISED EDITION-B
HFC
utilized
R410A
February 2018
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
Note:
• This service manual describes
technical data of the outdoor
units only.
[Service Ref.]
PUMY-P60NKMU1
PUMY-P60NKMU1-BS
<Outdoor unit>
[Model name]
PUMY-P60NKMU1
Salt proof model
PUMY-P60NKMU1-BS
TECHNICAL & SERVICE MANUAL
OUTDOOR UNIT
Model name
indication
Revision:
• Corrected some descrip-
tions in "4-2. CORRECTION
BY TEMPERATURE" in
REVISED EDITION-B.
• Some other descriptions
have been also modified.
OCH613 REVISED EDITION-B
is void.

2
Cautions for units utilizing refrigerant R410A
1-1. CAUTIONS RELATED TO NEW REFRIGERANT
Use new refrigerant pipes.
Store the piping indoors, and keep both ends of
the piping sealed until just before brazing.
(Leave elbow joints, etc. in their packaging.)
Avoid using thin pipes.
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 refrige-
rant 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 com-
pressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigera-
nt will change and the efficiency will be lowered.
Flare tool
Electronic refrigerant
charging scale
Vacuum pump adaptor
Size adjustment gauge
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R410A
Contamination inside refrigerant piping can cause deterio-
ration of refrigerant oil, etc.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
If large amount of mineral oil enters, that can cause deterio-
ration of refrigerant oil, etc.
Make sure that the inside and outside of refrige-
rant piping is clean and it has no contaminants
such as sulfur, oxides, dirt, shaving particles, etc,
which are hazard to refrigerant cycle.
In addition, use pipes with specified thickness.
The refrigerant oil applied to flare and flange
connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Use the specified refrigerant only.
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the
unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the
spec labels provided with our products.
We will not be held responsible for mechanical failure,
system malfunction, unit breakdown or accidents caused
by failure to follow the instructions.
1 SAFETY PRECAUTION
OCH613B

3
Electronic weighing scale
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
[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.
(4) If moisture or foreign matter might have entered the refrigerant piping during service, ensure to remove them.
[2] Additional refrigerant charge
When charging directly from cylinder
(1) Check that cylinder for R410A on the market is a syphon type.
(2) Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
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.
1-2. PRECAUTIONS FOR SALT PROOF TYPE "-BS" MODEL
No. Tool name Specifications
1Gauge manifold · Only for R410A
· Use the existing fitting specifications. (UNF1/2)
· Use high-tension side pressure of 768.7 PSI [5.3 MPa.G] or over.
2Charge hose · Only for R410A
· Use pressure performance of 738.2 PSI [5.09MPa.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 —
OCH613B

4
Cautions for refrigerant piping work
New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same as
for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure
of R410A is 1.6 times higher than that of R22, their sizes of flared sections and flare nuts are different.
1Thickness of pipes
Because the working pressure of R410A is higher compared to R22, be sure to use refrigerant piping with thickness shown
below. (Never use pipes of 7/256 in [0.7 mm] or below.)
2Dimensions of flare cutting and flare nut
The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that, R410A
is a refrigerant, which has higher risk of leakage because its working pressure is higher than that of other refrigerants.
Therefore, to enhance airtightness and intensity, flare cutting dimension of copper pipe for R410A has been specified sepa-
rately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also has partly
been changed to increase intensity as shown below. Set copper pipe correctly referring to copper pipe flaring dimensions
for R410A below. For 1/2 and 5/8 inch, the dimension B changes.
Use torque wrench corresponding to each dimension.
3Tools for R410A (The following table shows whether conventional tools can be used or not.)
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
1/32 [0.8]
1/32 [0.8]
1/32 [0.8]
5/128 [1.0]
—
1/32 [0.8]
1/32 [0.8]
1/32 [0.8]
5/128 [1.0]
5/128 [1.0]
Nominal
dimensions
(in)
Diagram below: Piping diameter and thickness
Outside
diameter (mm)
Thickness : in [mm]
R410A R22
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
11/32-23/64 [ 9.1]
1/2-33/64 [13.2]
41/64-21/32 [16.6]
49/64-25/32 [19.7]
—
9.0
13.0
16.2
19.4
23.3
Nominal
dimensions (in)
Flare cutting dimensions
Outside
diameter (mm) Dimension A ( )
+0
-0.4
Unit : in [mm]
R410A R22
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
43/64 [17.0]
7/8 [22.0]
1-3/64 [26.0]
1-9/64 [29.0]
17.0
22.0
24.0
27.0
36.0
Nominal
dimensions (in)
Flare nut dimensions Outside
diameter (mm)
Dimension B
Unit: in [mm]
R410A R22
—
Gauge manifold
Charge hose
Gas leak detector
Refrigerant recovery equipment
Refrigerant cylinder
Applied oil
Safety charger
Charge valve
Vacuum pump
Flare tool
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
Apply to flared section
Prevent compressor malfunction
when charging refrigerant by
spraying liquid refrigerant
Prevent gas from blowing out
when detaching charge hose
Vacuum drying and air
purge
Flaring work of piping
Bend the pipes
Cut the pipes
Weld the pipes
Refrigerant charge
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
Ester oil, ether oil and
alkylbenzene oil (minimum amount)
Tool exclusive for R410A
Tool exclusive for R410A
Tools for other refrigerants can
be used if equipped with adop-
ter for reverse flow check
Tools for other refrigerants
can be used by adjusting
flaring dimension
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 adopter for rever-
se flow)
(Usable by adjusting
flaring dimension)
Can R407C tools be used?
Ester oil, ether oil:
Alkylbenzene oil: minimum amount
(Usable if equipped
with adopter for rever-
se flow)
(Usable by adjusting
flaring dimension)
: 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.
DimensionA
DimensionB
OCH613B

5
2OVERVIEW OF UNITS
2-1. Auxiliary HEATING ON/OFF CONTROL SET-UP
(1) Auxiliary heating operation controls another heat source that depends on the main system's operations,
which means the interlock operation shown in "b)" will be possible.
a)
b) Different Indoor unit applications that can be applied:
(2) Outdoor unit DIPSW5-4 for auxiliary heating control:
Set DIPSW5-4 when power is turned off at unit.
OFF: Disable auxiliary Heating Function (Initial setting)
ON : Enable auxiliary Heating Function
Indoor unit must be R410A UL model for this function to operate.
(3) Determine required indoor fans speed during defrost mode:
To set the fan speed, see the chapter referring to heater control in the indoor unit’s Technical & Service Manual.
OCH613B

6
When the set temperature ranges overlap, the previously set pattern (1,2 or 3) has a priority.
The stage 1 has the highest priority, 2 the second and then 3.
b) Based on above chart listed the sequence of operation on "On ambient decrease"
Stage 1 :(TH7 = > 50°F [10
: ]) : the outdoor unit runs in HP mode.
Stage 2 :(TH7 = 50 to í13°F [10
to í25 : ]) : the outdoor unit runs in HP mode with auxiliary heating.
Stage 3 :(TH7 = < í13°F >í25
: ]) : Auxiliary heating only (Outdoor unit is OFF).
c) Based on above chart listed the sequence of operation on "On ambient increase"
Stage 3 :(TH7 = < 32°F [0
: ]) : Auxiliary heating only (Outdoor unit is OFF).
Stage 2 :(TH7 = > 32 to 68°F [0 to 20
: ]) : Auxiliary heating with outdoor unit in HP mode.
Stage 1 :(TH7 = > 68°F [20
: ]) : Outdoor unit in HP mode only.
(4) Determine fan airflow setting during indoor thermo-OFF conditions:
a) These settings are done within Indoor DIPSW1-7 and DIPSW1-8, see chart below for options.
b) Recommended SW1-7 OFF and SW1-8 ON will determine airflow based on "Setting on the remote controller".
Fan speed
setting Fan speed setting
OFF ON
SW1-7 SW1-8
OFF OFF Very low
ON OFF Low
OFF ON Setting on
remote
controller
ON
ON
Stopped
Auxiliary heating
signal
Thermo condition
(5) Setting outdoor unit and auxiliary heat switch over temperatures.
When the DIPSW 5-4 is set to "ON", the outdoor unit and the contact output operates as shown below.
a) Outdoor default setting and operations are shown below:
Stage 1
A
mb. decreasing - Outdoor unit HP operation
Amb. increasing - Defrost : Heater contact ON signal
- Other than defrost : Contact OFF
Stage 2
- Outdoor unit HP operation
- Heater contact ON signal
Stage 3
- Outdoor unit OFF (Standby)
- Heater contact ON signal
TH7 = Outdoor temperature
a
í25
-C
[
í13 -F]
b
0
-C
[32-F]
c
10
-C
[50-F]
d
20
-C
[68-F]
Setting on
remote
controller
OCH613B

7
(6) Locally procured wiring
A basic connection method is shown.
(i.e. interlocked operation with the electric heater with the fan speed setting on high)
Recommended circuit
CN24
CN22
X
+
X
Remote control Board Relay circuit Adapter Indoor unit
control board Outdoor unit control board
Electric Heater power source
Electric
Heater
Red 1
White 2
Dip switch
SW5-4 "ON"
Preparations in the field Maximum cable length
is 10 m (32ft)
Red 1
Red 2
YellowGreen
FS1
FS2
FS1
FS2
R
S
R
S
CN24
H2
88H
H1
88H
26H
88H
1-phase power
supply
208V, 230V/60Hz
Control board
FS1, 2 ----- Thermal fuse
H1, H2 ----- Heater
26H--------- Overheat protection
thermostat
88H--------- Electromagnetic contactor
Wiring diagram
For relay X use the specifications given below operation coil
Rated voltage : 12 V DC
Power consumption :0.9W or less
*Use the diode that is recommended by the relay manufacturer at both ends of the relay coil.
The length of the electrical wiring for the PAC-YU24HT is 2 meters (6-1/2 ft)
To extend this length, use sheathed 2-core cable.
Control cable type : CVV, CVS, CPEV, or equivalent.
Cable size : 0.5 mm2to 1.25 mm2(AWG22 to AWG16)
Do not extend the cable more than 10 meters (32 ft).
OCH613B

8
2-2. UNIT CONSTRUCTION
Branching pipe
components Branch header (2 branches) Branch header (4 branches) Branch header (8 branches)
CMY-Y62-G-E CMY-Y64-G-E CMY-Y68-G-E
Remote
controller
Name M-NET remote controller MA remote controller
Model number PAR-F27MEA-E
PAR-U01MEDU PAR-21MAA, PAR-30/31/32MAA
Functions
• A handy remote controller for use in
conjunction with the Melans centralized
management system.
• Addresses must be set.
• Addresses setting is not necessary.
Outdoor unit
7HP
PUMY-P60NKMU1
PUMY-P60NKMU1-BS
Applicable
indoor unit
Capacity Type 06 to Type 72
Number of units 1 to 12 unit
Total system wide capacity 50 to 130% of outdoor unit capacity
Model
Capacity
Cassette Ceiling Ceiling
Concealed Wall Mounted Ceiling Suspended Floor standing
Multi-position
air handling unit
4-way flow 1-way flow Exposed Concealed
PLFY-EP PLFY-P PLFY-P PLFY-P PMFY-P PEFY-P PKFY-P PCFY-P PFFY-P PFFY-P PVFY-P
NEMU-E NEMU-E NCMU-E NFMU-E NBMU-E
NMAU NMSU-E NHMU-E
NMHSU-E
NBMU-E NHMU-E NKMU-E
NKMU-E NEMU-E NRMU-E NAMU-E
05 ––– – ––––––– – – – –
06 –––– –– –– – –
08 – – –– –– –
12 ––– ––
15 –– – –
18 – – –– ––
24 –– – –––
27 –––– – ––––– – – – –
30 –– – –––– ––
36 –– – ––––– ––
48 –– – ––––– – – –
54 –––– – ––––– – – –
72 –––– – ––– ––– – – – –
–: Not connectable
: Connectable
OCH613B

9
2-3. UNIT SPECIFICATIONS
(2) Method for identifying MULTI-S model
(1) Outdoor Unit
Outdoor unit
Cooling/Heating capacity indicates the maximum value at operation under the following condition.
Cooling Indoor D.B. 80°F/W.B. 67°F: [D.B. 26.7°C/W.B. 19.4°C]
Outdoor D.B. 95°F/W.B. 75°F: [D.B. 35°C/W.B. 23.9°C]
Heating Indoor D.B. D.B.70°F/W.B.60°F: [D.B. 21.1°C/W.B. 15.6°C]
Outdoor D.B. 47°F/W.B. 43°F: [D.B. 8.3°C/W.B. 6.1°C]
(3) Operating temperature range
Notes: D.B. : Dry Bulb Temperature
W.B. : Wet Bulb Temperature
*150 to 115 °F [10 to 46°C] D.B. : When connecting PKFY-P06NBMU, PKFY-P08NHMU type indoor unit.
*2 5 to 115°F [−15 to 46°C] D.B.: When using an optional air protect guide [PAC-SH95AG-E].
However, this condition does not apply to the indoor units listed in *1.
Service Ref. PUMY-P60NKMU1
PUMY-P60NKMU1-BS
Capacity Cooling (kBTU/h) 60.0
Heating (kBTU/h) 66.0
Compressor (kW) 4.1
PU M Y - P 60 N K M U 1 - BS
Refrigerant
R410A
Indicates equivalent
to Cooling capacity Power supply
N: 208/230 V AC 60 Hz
Outdoor unit
model type
Sub-
number
M-NET
control
Frequency
conversion
controller
Outdoor unit
MULTI-S Salt proof
type
UL model
Cooling Heating
Indoor-side intake air temperature 59 to 75°F [W.B. 15 to 24°C] 59 to 81°F [D.B. 15 to 27°C]
Outdoor-side intake air temperature 23 to 115°F [D.B. −5 to 46°C]*1*2 −13 to 59°F [W.B. −25 to 15°C]
OCH613B

10
3SPECIFICATIONS
Model PUMY-P60NKMU1
PUMY-P60NKMU1-BS
Power source 208/230V AC, 60 Hz
Cooling
(Nominal)
Capacity BTU/h*160,000
Power input kW 4,680
Current input 208V / 230V A 22.8/20.6
EER BTU/h 12.8
Temp. range of
cooling
Indoor temp. W.B. 59 to 75°F [15 to 24°C]
Outdoor temp. D.B. 23 to 115°F [−5 to 46°C] *3*4
Heating
(Nominal)
Capacity BTU/h*266,000
Power input kW 5,450
Current input 208V / 230V A 26.6 / 24.1
COP W/W 3.55
Temp. range of
heating
Indoor temp. D.B. 59 to 81°F [15 to 27°C]
Outdoor temp. W.B. −13 to 59°F [−25 to 15°C]
Breaker size 40A
Max. fuse size 42A
Min. circuit ampacity 36A
Indoor unit
connectable
Total capacity 50 to 130% of outdoor unit capacity
Model/ Quantity Citymulti 06–72/12
Sound pressure level
(measured in anechoic room)
dB <A> 58/59
Refrigerant
piping diameter
Liquid pipe inch (mm) 3/8 (9.52)
Gas pipe inch (mm) 3/4 (19.05)
FAN *2 Type x Quantity Propeller Fan x 2
Air flow rate m³/min 138
L/s 2,300
cfm 4,879
Control, Driving mechanism DC control
Motor output kW 0.2+0.2
External static press. 0
Compressor Type x Quantity Scroll hermetic compressor x 1
Manufacture Mitsubishi Electric Corporation
Starting method Inverter
Capacity control % Cooling: 36 to 100
Heating: 22 to 100
Motor output kW 4.1
Case heater kW 0
Lubricant FV50S (2.3 liter)
External finish Galvanized Steel Sheet
Munsell No. 3Y 7.8/1.1
External dimension HxWxD mm 1,338 × 1,050 × 330(+25)
inch 52-11/16 × 41-11/ 32 × 13 (+1)
Protection devices High pressure protection High pressure Switch, High pressure Sensor
Inverter circuit (COMP./FAN) Overcurrent detection, Overheat detection(Heat sink thermistor)
Compressor Compressor thermistor, Overcurrent detection
Fan motor Overheating, Voltage protection
Refrigerant Type x original charge R410A 5.1kg
Control Electronic expansion valve
Net weight kg (lb) 139 (306)
Heat exchanger Cross Fin and Copper tube
HIC circuit (HIC: Heat Inter-Changer) HIC circuit
Defrosting method Reversed refrigerant circuit
Drawing External BK01V261
Wiring BH78B813
Standard
attachment
Document Installation Manual
Accessory Grounded lead wire x2, conduit plate
Optional parts Joint: CMY-Y62-G-E
Header: CMY-Y64/68-G-E
Remarks Unit converter
kcal/h = kW × 860
BTU/h = kW × 3,412
cfm = m³/min x 35.31
lb = kg/0.4536
Above specification data
is
subject to rounding
variation.
*1 Nominal cooling conditions *2Nominal heating conditions
Indoor :
80.0°F D.B/67.0°F W.B. [26.7°C D.B. /19.4°C W.B.] 70.0°F D.B./60.0°F W.B. [21.1°C D.B./15.6°C W.B.]
Outdoor :
95.0°F D.B./75.0°F W.B.[35.0°C D.B. /23.9°C W.B.] 47.0°F D.B./43.0°F W.B. [8.3°C D.B./6.1°C W.B.]
Pipe length :
25 ft [7.6 m] 25 ft [7.6 m]
Level difference : 0 ft [0 m] 0 ft [0 m]
Note : Due to continuing improvement, above specifications may be subject to change without notice.
*350 to 115°F [10 to 46°C] D.B. :
When connecting PKFY-P06NBMU and PKFY-P08NHMU type indoor unit.
*4
5 to 115°F [−15 to 46°C] D.B.: When using an optional air protect guide [PAC-SH95AG-E].
However, this condition does not apply to the indoor units listed in *3.
OCH613B

11
4DATA
4-1. SELECTION OF COOLING/HEATING UNITS
How to determine the capacity when less than or equal 100% indoor model size units are connected in total:
The purpose of this flow chart is to select the indoor and outdoor units. For other purposes, this flow chart is intended only for reference.
No
Yes
Temporarily select the Indoor/Outdoor Units
Reselect the outdoor units
Reselect the indoor units
Reselect the outdoor units
Reselect the indoor units
Indoor Unit
n
Total Indoor Units Capacity (CT
i
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ik
×
k=1
,QGLYLGXDO,QGRRU Temperature Correction Coef. Įk ) (Figure 1, 4)
Outdoor Unit*1
Outdoor Unit Capacity (CT
o
) = Rated Outdoor Unit Capacity × Outdoor
Temperature Correction Coef. (Figure 2, 5) × Piping Length
Correction Coef. (Figure 3, 6) × Defrost Correction Coef. (in heating operation, Table 1)
Maximum Capacity(CT
max
) = CT
o
Yes
Completed Selecting Units
Want to change to smaller
indoor units?
Does it fulfill the load of
each room?
CT
o
&7
i
L&7
o
Maximum Capacity(CT
max
) = CT
i
L&7
i
Need to select smaller
outdoor unit?
Does it fulfill the load of
each room?
Outdoor Unit Input = Rated Outdoor Unit Input ×
c
DYH
Determine the load (L) and
the Indoor/Outdoor Temperature
n: Total Number of Indoor Units
k: Indoor Unit Number
Yes
No
No
No
No
Yes
No
No
Yes
Yes
Capacity
Determination
Input
Calculation
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c
DYH)AYHUDJH,QGRRUWHPSSRZHULQSXW&RHI
c
DYH)
c
DYH ^F k
× (M
k
0
k
)}
n
k=1
n
k=1 c
DYH ^F k
× (M
k
0
k
)}
n
k=1
n
k=1
(If indoor to outdoor connectable
capacity ratio is less than 100%, the
capacity correction is set as 100% )
*c
k
: Outdoor unit power input coefficient of k indoor unit room temp. (Refer to 4-2.)
*M
k
: 1XPEHUSDUWRIWKHNLQGRRUXQLWPRGHOHJ3ĺ
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im
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n
m=1
,QGLYLGXDO,QGRRU8QLW&DSDFLW\&7
ik
= CT
max
× CT
ik
× Įk
Outdoor Unit Input = Rated Outdoor Unit Input ×
c
DYH
× (CT
i
)
Completed Selecting Units
(x) is the approximate correction function when less than or equal
100% model size units are input as connected.
Yes
OCH613B

12
How to determine the capacity when greater than 100% indoor model size units are connected in total:
No
Yes
Temporarily select the indoor/outdoor units
Reselect the outdoor units
Reselect the indoor units
Reselect the outdoor units
Reselect the indoor units
Indoor Unit
n
Total Indoor Units Capacity (CT
i
 ,QGLYLGXDO5DWHG,QGRRU8QLW&DSDFLW\&7
ik
×
k=1
,QGLYLGXDO,QGRRU Temperature Correction Coef. Įk ) (Figure 1, 4)
Outdoor Unit*1
Maximum Capacity(CT
max
) = CT
o
Yes
Want to change to smaller
indoor units?
Does it fulfill the load of
each room?
CT
o
&7
i
L&7
o
Maximum Capacity(CT
max
) = CT
i
L&7
i
Need to select smaller
outdoor unit?
Does it fulfill the load of
each room?
Rated Outdoor Unit Capacity
< Total Indoor Units Capacity
Outdoor Unit Input
= Rated Outdoor Unit Input ×
Outdoor Temperature
Correction
Coef.
× (CT
i
)
Determine the load (L) and
the Indoor/Outdoor Temperature
n: Total Number of Indoor Units
k: Indoor Unit Number
Yes
Yes
No
No
No
No
Yes
No
No
No
Yes
Yes
Yes
AYHUDJH,QGRRUWHPSSRZHULQSXW&RHI
c
DYH)
^F
k
× (M
k
0
k
)}
n
k=1
n
k=1
7KHSXUSRVHRIWKLVIORZFKDUWLVWRVHOHFWWKHLQGRRUDQGRXWGRRUXQLWV)RURWKHUSXUSRVHVWKLVIORZFKDUWLVLQWHQGHGRQO\for reference.
*c
k
: 2XWGRRUXQLWSRZHULQSXWFRHfficient of k indoor unit room temp. (Refer to 4-2.)
*M
k
: 1XPEHUSDUWRIWKHNLQGRRUXQLWPRGHOHJ3ĺ
AYHUDJH,QGRRUWHPSSRZHULQSXW&RHI c
DYH)
c
DYH ^F k
× (M
k
0
k
)}
n
k=1
n
k=1
Outdoor Unit Input =Rated Outdoor Unit Input × c
DYH Outdoor Unit Input = Rated Outdoor Unit Input ×
c
DYH
× (CTi )
&7
im
× Įm )
n
m=1
,QGLYLGXDO,QGRRU8QLW&DSDFLW\&7
ik
= CT
max
× CT
ik
× Įk
Completed Selecting Units
Completed Selecting Units
[LVWKHDSSUR[LPDWHFRUUHFWLRQIXQFWLRQZKHQJUHDWHU
than 100% model size units are connected.
Outdoor Unit Capacity (CT
o
) = Rated Outdoor Unit Capacity × ( )
× Outdoor Temperature Correction Coef. (Figure 2, 5)
× Piping Length Correction Coef. (Figure 3, 6) × Defrost Correction Coef. (in heating, Table 1)
[LVWKHDSSUR[LPDWHFRUUHFWLRQIXQFWLRQZKHQJUHDWHUWKDQ
model size units are input as connected.
[LVWKHDSSUR[LPDWHFRUUHFWLRQIXQFWLRQZKHQOHVVWKDQRUHTXDO
100% model size units are input as connected.
CT
i
× (CTi )
Input
Calculation
OCH613B

13
0 20 40 60 80 100 120 140 160 180 200 220 240 260
0.70
0.75
0.80
0.85
0.90
0.95
1.00
<Cooling> Design Condition
Outdoor Design Dry Bulb Temperature 98.6ºF (37.0ºC)
Total Cooling Load 54.0 kBTU/h
Room1
Indoor Design Dry Bulb Temperature 80.6ºF (27.0ºC)
Indoor Design Wet Bulb Temperature 68.0ºF (20.0ºC)
Cooling Load 26.0 kBTU/h
Room2
Indoor Design Dry Bulb Temperature 75.2ºF (24.0ºC)
66.2ºF (19.0ºC)
Indoor Design Wet Bulb Temperature
Cooling Load 28.0 kBTU/h
<Other>
Indoor/Outdoor Equivalent Piping Length 100 ft
1. Cooling Calculation
(1) Temporary Selection of Indoor Units
Room1
PEFY-P27 27.0 kBTU/h (Rated)
Room2
PEFY-P30 30.0 kBTU/h (Rated)
(2) Total Indoor Units Capacity
P27 + P30 = P57
(3) Selection of Outdoor Unit
The P60 outdoor unit is selected as total indoor units capacity is P57
PUMY-P60 60.0 kBTU/h
(4) Total Indoor Units Capacity Correction Calculation
Room1
Indoor Design Wet Bulb Temperature Correction (68.0ºF)
1.02 (Refer to Figure 1)
Figure 1 Indoor unit temperature correction
To be used to correct indoor unit only
Figure 2 Outdoor unit temperature correction
To be used to correct outdoor unit only
Figure 3 Correction of refrigerant piping length
Room2
Indoor Design Wet Bulb Temperature Correction (66.2ºF)
0.95 (Refer to Figure 1)
CTL Ȉ,QGRRU8QLW5DWLQJî,QGRRU'HVLJQ7HPSHUDWXUH&RUUHFWLRQ
îî
= 56.0 kBTU/h
(5) Outdoor Unit Correction Calculation
Outdoor Design Dry Bulb Temperature Correction (98.6ºF)
0.98 (Refer to Figure 2)
Piping Length Correction (100 ft) 0.96 (Refer to Figure 3)
Total Outdoor Unit Capacity (CTo)
Total Indoor Units Capacity (CTi)
CTo = 2XWGRRU5DWLQJî2XWGRRU'HVLJQ7HPSHUDWXUH&RUUHFWLRQî3LSLQJ/HQJWK&RUUHFWLRQ
îî
=
56.4 kBTU/h
(6) Determination of Maximum System Capacity
Comparison of Capacity between Total Indoor Units Capacity (CTi) and Total Outdoor Unit Capacity (CTo)
CTi = 56.0 < CTo = 56.4, thus, select CTi.
CTx = CTi = 56.0kBTU/h
(7) Comparison with Essential Load
Against the essential load 54.0 kBTU/h, the maximum system capacity is 56.0 kBTU/h: Proper outdoor units have been selected.
(8) Calculation of Maximum Indoor Unit Capacity of Each Room
CTx = CTi, thus, calculate by the calculation below
Room1
Indoor Unit Rating îIndoor Design Temperature Correction
î
= 27.5 kBTU/h OK: fulfills the load 26.0 kBTU/h
Room2
Indoor Unit Rating îIndoor Design Temperature Correction
î
= 28.5 kBTU/h OK: fulfills the load 28.0 kBTU/h
Go on to the heating trial calculation since the selected units fulfill the cooling loads of Room 1, 2.
-15 -10 -5 0 5 10 15 20 25 30 35 40 45
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
Ratio of cooling capacity
Outdoor Temperature [°C D.B.]
[°F W.B.]
514
23 32 41 50 59 68 77 86 95 104 113
19.4°C (67.0°F) W.B
15 16 17 18 19 20 21 22 23 24
59 60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2
0.4
0.6
0.8
1.0
1.2
Ratio of cooling capacity
Indoor Temperature
[°CW.B.]
[°FW.B.]
30 [kBTU/h]30 [kBTU/h]
45 [kBTU/h]
45 [kBTU/h]
60 [kBTU/h]
60 [kBTU/h]
78 [kBTU/h]
78 [kBTU/h]
Capacity ratio
Piping equivalent length (ft)
Total capacity of indoor unit
Capacity of indoor unit
Model 08
Model Number
for indoor unit
Model
Capacity 8.0
Model 06
6.0
Model 12
12.0
Model 15
15.0
Model 18
18.0
Model 24
24.0
Model 27
27.0
Model 30
30.0
Model 36
36.0
Model 48
48.0
Model 54
54.0
Model 72
72.0
Model 05
5.0
OCH613B

14
Capacity of indoor unit
Model 08
Model Number
for indoor unit
Model
Capacity 9.0
Model 06
6.7
Model 12
13.5
Model 15
17.0
Model 18
20.0
Model 24
27.0
Model 27
30.0
Model 30
34.0
Model 36
40.0
Model 48
54.0
Model 54
60.0
Model 72
80.0
Model 05
5.6
<Heating>
Design Condition
Outdoor Design Wet Bulb Temperature 35.6ºF (2.0ºC)
Total Heating Load 55.0 kBTU/h
Room1
Indoor Design Dry Bulb Temperature 69.8ºF (21.0ºC)
Heating Load 26.5 kBTU/h
Room2
Indoor Design Dry Bulb Temperature 73.4ºF (23.0ºC)
Heating Load 28.5 kBTU/h
<Other>
Indoor/Outdoor Equivalent Piping Length 100 ft
2. Heating Calculation
(1) Temporary Selection of Indoor Units
Room1
PEFY-P27 30.0 kBTU/h (Rated)
34.0 kBTU/h (Rated)
Room2
PEFY-P30
(2) Total Indoor Units Capacity
P27 + P30 = P57
(3) Selection of Outdoor Unit
The P60 outdoor unit is selected as total indoor units capacity is P57
PUMY-P60 66.0 kBTU/h
(4) Total Indoor Units Capacity Correction Calculation
Room1
Indoor Design Dry Bulb Temperature Correction (69.8ºF)
1.00 (Refer to Figure 4)
Room2
Indoor Design Dry Bulb Temperature Correction (73.4ºF)
0.92 (Refer to Figure 4)
CTL Ȉ,QGRRU8QLW5DWLQJî,QGRRU'HVLJQ7HPSHUDWXUH&RUUHFWLRQ
îî
= 61.3 kBTU/h
(5) Outdoor Unit Correction Calculation
Outdoor Design Wet Bulb Temperature Correction (35.6ºF)
1.0 (Refer to Figure 5)
Piping Length Correction (100 ft)
Defrost Correction
0.96 (Refer to Figure 6)
0.89 (Refer to Table 1)
Total Outdoor Unit Capacity (CTo)
Total Indoor Units Capacity (CTi)
CTo = Outdoor Unit Rating îOutdoor Design Temperature Correction îPiping Length
Correction îDefrost Correction
îîî
= 56.4 kBTU/h
(6) Determination of Maximum System Capacity
Comparison of Capacity between Total Indoor Units Capacity (CTi) and Total Outdoor Unit Capacity (CTo)
CTi = 61.3 > CTo = 56.4, thus, select CTo.
CTx = CTo = 56.4 kBTU/h kW
(7) Comparison with Essential Load
Against the essential load 55.0 kBTU/h, the maximum system capacity is 56.4 kBTU/h: Proper outdoor units have been selected.
(8) Calculation of Maximum Indoor Unit Capacity of Each Room
CTx = CTo, thus, calculate by the calculation below
Room1
îîî+î
= 27.6 kBTU/h OK: fulfills the load 26.5 kBTU/h
Room2
= îîî+î
= 28.8 kBTU/h OK: fulfills the load 28.5 kBTU/h
Completed selecting units since the selected units fulfill the heating loads of Room 1, 2.
Figure 4 Indoor unit temperature correction
To be used to correct indoor unit only
Figure 5 Outdoor unit temperature correction
To be used to correct outdoor unit only
Figure 6 Correction of refrigerant piping length
0D[LPXP&DSDFLW\î5RRP&DSDFLW\DIWHUWKH7HPSHUDWXUH&RUUHFWLRQ5RRP7RWDO&DSDFLW\DIWHUWKH7HPSHUDWXUH&RUUHFWLRQ
0D[LPXP&DSDFLW\î5RRP&DSDFLW\DIWHUWKH7HPSHUDWXUH&RUUHFWLRQ5RRP7RWDO&DSDFLW\DIWHUWKH7HPSHUDWXUH&RUUHFWLRQ
15 16 17 18 19 20 21 22 23 24 25 26 27
59 60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2 77 78.8 80.6
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
Ratio of heating capacity
Indoor Temperature
[°C D.B.]
[°F W.B.]
Ratio of heating capacity
[°C D.B.]
[°F W.B.]
-25 -20 -15 -10 -5 0 5 10 15
-4 5 14 23 32 41 50 59
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
Outdoor Temperature
21.1°C (70.0°F) W.B
-7
0 20 40 60 80 100 120 140 160 180 200 220 240 260
0.70
0.75
0.80
0.85
0.90
0.95
1.00
Capacity ratio
Piping equivalent length (ft)
Outdoor Intake temperature <W.B.°F (°C)> 43(6) 39(4) 36(2) 32(0) 28(−2) 25(−4) 21(−6) 18(−8) 14(−10) 5(−15) −4(−20) −13(−20)
Correction factor 1.0 0.98 0.89 0.88 0.89 0.9 0.95 0.95 0.95 0.95 0.95 0.95
OCH613B

15
n: Total number of the indoor units
k: Number of the indoor unit
ck: Outdoor unit power input coefficient of k indoor unit room temp.
Mk: Number part of the k indoor unit model (e.g. P80 ĺ80)
<Cooling>
3. Power input of outdoor unit
Outdoor unit : PUMY-P60
Indoor unit 1 : PEFY-P27
Indoor unit 2 : PEFY-P30
(1) Rated power input of outdoor unit 4.68 kW
1.04 (Refer to “4-2. CORRECTING BY TEMPERATURE”.)
(2) Calculation of the average indoor temperature power input coefficient
Coefficient of the outdoor unit for indoor unit 1 (Outdoor temp. 98.6°F [37.0°C] D.B., Indoor temp. 68.0°F [20.0°C] W.B.)
Maximum System Capacity (CTx) = Total Outdoor unit Capacity (CTo), so use the following formula
Total Indoor units capacity
27 + 30 = 57, thus, (CTi) = 0.95 (Refer to the tables in “4-4.STANDARD CAPACITY DIAGRAM”.)
PIo = Outdoor unit Cooling Rated Power Input × Correction Coefficient of Indoor temperature × (CTi)
= 4.68 × 0.94 × 0.95
= 4.18 kW
0.85 (Refer to “4-2. CORRECTING BY TEMPERATURE”.)
Coefficient of the outdoor unit for indoor unit 2 (Outdoor temp. 98.6°F [37.0°C] D.B., Indoor temp. 64.4°F [18.0°C] W.B.)
= 1.04 × 27/(27 + 30) + 0.85 × 30/(27 + 30)
= 0.94
n
k=1
n
k=1
Average indoor temp. power input coefficient ( c
ave
)  ^F
k
× (M
k
0
k
)}
(4) Outdoor power input (PIo)
(3) Coefficient of the partial load (CTi)
OCH613B

16
n: Total number of the indoor units
k: Number of the indoor unit
ck: Outdoor unit power input coefficient of k indoor unit room temp.
Mk: Number part of the k indoor unit model (e.g. P80 ĺ80)
<Heating>
(1) Rated power input of outdoor unit 5.45 kW
1.16 (Refer to “4-2. CORRECTING BY TEMPERATURE”.)
(2) Calculation of the average indoor temperature power input coefficient
Coefficient of the outdoor unit for indoor unit 1 (Outdoor temp. 26.6°F [í3°C] W.B., Indoor temp. 70°F [21.1°C] D.B.)
Maximum System Capacity (CTx) = Total Indoor unit Capacity (CTi), so use the following formula
PIo = Outdoor unit Heating Rated Power Input × Correction Coefficient of Indoor temperature × (CTi)
= 5.45 × 1.07 × 0.95
= 5.54 kW
1.09 (Refer to “4-2. CORRECTING BY TEMPERATURE”.)
Coefficient of the outdoor unit for indoor unit 2 (Outdoor temp. 26.6°F [í3°C] W.B., Indoor temp. 78.8°F [26°C] D.B.)
= 1.16 × 27/(27 + 30) + 1.09 × 27/(27 + 30)
= 1.07
n
k=1
n
k=1
Average indoor temp. power input coefficient ( c
ave
)  ^F
k
× (M
k
0
k
)}
(4) Outdoor power input (PIo)
(3) Coefficient of the partial load (CTi)
Total indoor units capacity
27 + 30 = 57, thus, (CTi) = 0.95 (Refer to the tables in “4-4. STANDARD CAPACITY TEMPERATURE”.)
OCH613B

17
4-2. CORRECTION BY TEMPERATURE
15 16 17 18 19 20 21 22 23 24
59 60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2
0.4
0.6
0.8
1.0
1.2
Ratio of cooling capacity
Indoor Temperature
[°CW.B.]
[°FW.B.]
514
23 32 41 50 59 68 77 86 95 104 113
-15 -10 -5 0 5 10 15 20 25 30 35 40 45
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
Ratio of cooling capacity
Outdoor Temperature
67.0°F (19.4°C) W.B.
[°C W.B.]
[°F W.B.]
-15 -10 -5 0 5 10 15 20 25 30 35 40 45
514
23 32 41 50 59 68 77 86 95 104 113
0.0
0.2
0.4
0.6
0.8
1.0
1.2
Ratio of power input
Outdoor Temperature [°C W.B.]
[°F W.B.]
68.0°F (20.0°C) W.B.68.0°F (20.0°C) W.B. 75.2°F (24.0°C) W.B.75.2°F (24.0°C) W.B. 71.6°F (22.0°C) W.B.71.6°F (22.0°C) W.B.
67.0°F (19.4°C) W.B.67.0°F (19.4°C) W.B. 64.4°F (18.0°C) W.B.64.4°F (18.0°C) W.B.
60.8°F (16.0°C) W.B.60.8°F (16.0°C) W.B.
CITY MULTI could have varied capacity at different designing temperature. Using the nominal cooling/heating capacity value
and the ratio below, the capacity can be observed at various temperature.
PUMY
P60
Nominal
cooling
capacity
BTU/h 60,000
Input kW 4.68
Figure 7 Indoor unit temperature correction
To be used to correct indoor unit capacity only
Figure 8 Outdoor unit temperature correction
To be used to correct outdoor unit capacity only
<Cooling>
Indoor Temperature
Indoor Temperature
OCH613B

18
<Heating>
15 16 17 18 19 20 21 22 23 24 25 26 27
59 60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2 77 78.8 80.6
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
Ratio of heating capacity
Indoor Temperature
[°C W.B.]
[°F W.B.]
Ratio of heating capacity
[°C W.B.]
[°F W.B.]
-25 -20 -15 -10 -5 0 5 10 15
-4-13 5 14 23 32 41 50 59
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
Outdoor Temperature
21.1°C (70.0°F) D.B.
-25 -20 -15 -10 -5 0 5 10 15
-13 -4 5 142332415059
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
Ratio of power input
Outdoor Temperature [°C W.B.]
[°F W.B.]
70.0°F (21.1°C) D.B.
60.8°F (16.0°C) D.B.
78.8°F (26.0°C) D.B.
Figure 9 Indoor unit temperature correction
To be used to correct indoor unit capacity only
Figure 10 Outdoor unit temperature correction
To be used to correct outdoor unit capacity only
PUMY
P60
Nominal
heating
capacity
BTU/h 66,000
Input kW 5.45
Indoor Temperature
Indoor Temperature
OCH613B

19
Operation PUMY-P60NKMU1
PUMY-P60NKMU1-BS
Operating
conditions
Ambient
temperature
Indoor
DB/WB
80°F / 67°F
[26.7°C / 19.4°C]
70°F / 60°F
[21.1°C / 15.6°C]
Outdoor 95°F / 75°F
[35.0°C / 23.9°C]
47°F / 43°F
[8.3°C / 6.1v]
Indoor unit
No. of connected units Unit 4
No. of units in operation 4
Model - 15 × 4
Piping
Main pipe
Ft (m)
9.84 (3)
Branch pipe 14.76 (4.5)
Total pipe length 68.90 (21)
Fan speed - Hi
Amount of refrigerant LBS. OZ. (kg) 19LBS. 6OZ. (8.8)
Outdoor
unit
Electric current A 20.6 24.1
Voltage V 230
Compressor frequency Hz 42 52
LEV opening Indoor unit Pulse 389 498
Pressure High pressure/Low pressure PSIG [MPaG] 342/136 [2.36/0.94] 425/97 [2.93/0.67]
Temp. of each
section
Outdoor unit
Discharge
°F[°C]
136.8 [58.2] 154.4 [68.0]
Heat exchanger outlet 90.0 [32.2] 33.1 [0.6]
Accumulator inlet 55.4 [13.0] 32.2 [0.1]
Compressor inlet 57.2 [14.0] 30.9 [-0.6]
Indoor unit Lev inlet 80.6 [27.0] 104.0 [40.0]
Heat exchanger inlet 50.0 [10.0] 141.8 [61.0]
4-3. STANDARD OPERATION DATA (REFERENCE DATA)
OCH613B

20
4-4. STANDARD CAPACITY DIAGRAM
Before calculating the sum of total capacity of indoor units, please convert the value into the kW model capacity following the formula on
"4-1-1. Method for obtaining system cooling and heating capacity".
Ratio of capacity
Total capacity of indoor units (kBTU/h)
Total capacity of indoor units (kBTU/h)
Ratio of power inputRatio of current
Total capacity of indoor units (kBTU/h)
010 20 30 40 50
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
01020
30 40 50
0.0
0.2
0.4
0.6
0.8
1.0
01020
30 40 50
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
4-4-1. PUMY-P60NKMU1(-BS) <cooling>
208, 230 V
PUMY
P60
Nominal cooling capacity BTU/h 60,000
Input kW 4.68
Current (208V) A 22.8
Current (230V) A 20.6
OCH613B