INSTRUCTION MANUAL
S-250WX2E5
SGP-WE80M1
S-500WX2E5
SGP-WE170M1
Gas Heat Pump Chiller
Water Heat Exchanger
M1 Type
S-710WX2E5
CONTENTS
...... 1
CHARACTERISTICS AND REQUESTS
PERIODICAL INSPECTION
SAFETY PRECAUTIONS
Cautions before use
Precautions during use
NAMES OF PARTS
Water Heat Exchanger
Remote Controller
OPERATION
Setting the Present Time
Weekly Program Function
Setting temperature
Sleeping Function
CARE AND CLEANING
POINTS TO CONFIRM FOR INSTALLATION
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1
2
3
3
5
9
9
10
12
12
13
18
19
21
22
Use a equipment properly and save energy
82664119401000
82664119378000
CHARACTERISTICS AND REQUESTS
ABOUT YOUR GAS HEAT PUMP AIR CONDITIONER
The gas heat pump air conditioner (GHP) uses gas as the fuel to drive the compressor.
As it uses gas engine, there are various characteristics.
Even on very cold days the unit doesn't almost frost up so it provides stable heating operation.
As the electric power consumption is about 3 kW, this leads to be less received power equipment.
However, as with a car engine, periodical inspections by a specialist are for efficient use needed for a comfortable
operation. Please make sure you have these periodical inspections.
PLEASE ENSURE YOU SIGN UP FOR A REGULAR CHECK UP CONTRACT
In order to have a comfortable operation of GHP for a long period, periodical inspections are necessary.
Please conduct yearly inspections supported by a specialist.
What will happen if you
1. The engine oil will deteriorate, causing a malfunction.
2. The air cleaner element will be clog up, causing carbon monoxide and
occasional reduction of performance.
REQUESTS
Once signed up for a periodical inspection, a specialist will call on depending on the length of time the unit has
been in use. After a fixed period of in use hours. the remote controller will display "Oil lnspection". At this time we
would appreciate you contacting your dealer or service center for a check up.
For details please refer to page 3.
don't have periodical inspections.
CHANGING ENGINE OIL
Periodically change engine oil and oil filter.
If you forget to change engine oil or use a non-specified oil, it may have a bad effect on the engine and be the cause
of trouble.
* Engine Oil (Genuine Oil)
CAUTION
Filling in too much oil will have a bad effect on the engine.
PIease consult with your service center or dealer when changing the oil.
1
PERIODICAL INSPECTION
In order to have a comfortable operation of GHP for a long period, periodical inspections are necessary. When you
purchase your GHP, please sign up for Panasonic's periodical inspections contract system.
When you sign up for a periodical inspection, specialist will call on you.
For more details about the inspection contract, please ask your dealer or consult with one of our service centers.
For the details of periodic inspections, refer to the instruction manual included with the outdoor unit.
TEST OPERATION
Inspection items
(Test operation)
s Check the instaIIation work
s Inspect the electricity wiring
s Inspect the equipment itself
s Check an engine system
s Check safety protection devices
s Operation data collection
s Gas leakage check
PLEASE
contact your installer for repairs if something is found to be amiss
during the test operation.
2
SAFETY PRECAUTIONS
Before operating the unit, please be sure to read the SAFETY PRECAUTIONS
Listed below are two types of precautions, one is a WARNING and the other is a CAUTION.
Please be sure to obey these instruction for safety sake.
• The expressions have the following meaning.
WARNING:
CAUTION :
An assumption that a mistake in use could lead to death or injury.
An assumption that a mistake in use could lead to injury or could cause physical
damage to the equipment.
• The meaning of the symbols
: "WARNING" or "CAUTION'' is urged.
: Shows that something is "FORBIDDEN".
: Shows that something should be done.
• Please keep this manual in an easy to reach place so the operator can easily refer to it.
If the operator should change, please be sure to hand over this manual for him to read.
Cautions before use
WARNING
Do NOT install the equipment
yourself.
Please ask your dealer
or a specialist to install
the equipment. lf you
improperly install it by
yourself, it might lead to an
Ask for the
equipment to
be installed
electrical shock, fi re and
water leakage and so on.
Confi rm that each unit has an
exclusive electric circuit.
If you use other electrical
equipment(s) on the same
circuit, then you may blow
a fuse or cause secondary
damage to equipment.
Confi rm the electric circuit.
Check the
electric circuit
Confi rm the kind of gas you use.
If you use the wrong kind
of gas, it might lead to
incomplete combustion
and be the cause of gas
poisoning. Confi rm the gas
kind.
Check the
kind of gas
In the rare possibility of a leak of
refrigerant.
If the equipment is installed in a small room,
steps must be taken to ensure the rare
possibility that leakage of the refrigerant
It is necessary
to limit the
amount of
leakage of the
refrigerant.
does not exceed a certain
limit. Before installation,
consult with your dealer
about this certain limit. In
an emergency when the
refrigerant leaks, it may
cause an accident due to
lack of oxygen in the air.
Confi rm that the exhaust drain
from the outdoor unit and the drain
water from the indoor unit is not
commonly connected.
lf these are the common
pipes, then exhaust gas
could leak into the room
and be the cause of
Check the
drains
poisoning. Confi rm the
drains are separate.
Be sure to buy Panasonic
specifi ed equipment.
If you buy separate equipment such as an
air cleaner or a humidifi er (in case of fi tting
inside the unit), please be sure to buy only
Panasonic specifi ed products.
Please buy
Panasonic
specifi ed
equipment
And ask a specialist
dealer to install it. lf you
improperly install the
equipment by yourself,
it may lead to an electric
shock, fi re or water
leakage and so forth.
Please buy Panasonic
specifi ed equipment.
Please be sure to install the
outdoor unit where there is no
volatile or infl ammable material.
Please ascertain there is
no occurence, infl ux or
collection of infl ammable
Install your
outdoor unit
where there is
no infl ammable
or volatile
material.
or volatile gases in the
area surrounding the place
you install your outdoor
unit. lf you don’t do this, it
may cause a fi re.
CAUTION
Check the condition of grounding
work.
Do not connect the ground
wire to any gas pipes, water
pipes, lightening rods or
telephone ground wires. If the
Ground the
equipment
Water pipe
Some parts are made
of plastic and are no
good for earthing.
Gas pipe
There is a danger a ignition and explosion.
The telephone earth, a lightning rod.
When struck by lightning, there is a great danger of a
massive power surge.
ground wire is faulty, it may
result in an electrical shock.
er!
g
n
Da
Grounding
wire
3
Check you have a short circuit
breaker in place.
A short circuit breaker is
required by law. If you
don’t have one, it may
cause an electric shock or
A short circuit
breaker is
necessary.
fi re.
CAUTION
Check that you have a rated
power supply and check the
capacity of the circuit breaker.
It could lead to damage
to the equipment or
cause a fi re. Confi rm the
power supply and breaker
Confi rm the
power supply
and breaker
capacity.
capacity.
Only use a fuse of the correct
capacity.
Using wire and the like
instead of the correct fuse
could lead to an electrick
shock and fi re.
Forbidden
Precautions during use
WARNING
Please make sure that the exhaust
gases from the outdoor unit do not
seep inside.
If exhaust gases get inside
the room, it could cause
gas poisoning.
Forbidden Forbidden Forbidden
Don’t block the intake, discharge or the drain of the
outdoor unit.
It may lead to incomplete combustion and cause a
fi re or gas poisoning.
Forbidden
Don’t operate the equipment with
wet hands.
It could cause an electric
shock or damage the
equipment.
What to do if the outdoor unit leaks fuel gas.
If the outdoor unit leaks fuel gas, then turn off
the air conditioner, close the main gas valve
and contact your local gas company or service
company or dealer for repairs. It could cause a
fi re.
Turn off the
equipment
and close the
gas valve
Be sure to install the drain pipe
of water heat exchager unit
with some gradient to drain out
properly.
A water leakage could
cause damage to your
furniture and other
Check the
drain pipe
property.
Don’t put your hand or foreign
objects in the outlet or inlet of both
indoor and outdoor units.
A high speed f an is ro ta ting
inside and could cause
injury.
What to do if the refrirgerant leaks.
If the refrigerant leaks, then turn off the air
conditioner and ventilate the room. Then notify
your dealer or service center. If the leak exceeds
a certain limit, it could cause a lack of oxygen in
the air.
Turn off the
equipment and
do adequate
ventilation.
Do NOT open the panel.
Inside the unit are
revolving parts, high
temperature parts and high
Forbidden ForbiddenForbidden
voltage parts and if you
touch them it could result
in injury or an electric
shock.
Do NOT remove the fan guard.
If you detect a strange smell (a burning smell, a gas
smell), or a abnormal sound or unusual vibrations,
then turn off your air conditioner and the electric
supply.
If you continue to use the equipment under
abnormal circumstances, it could lead to an
electric shock, fi re or cause a machine breakdown.
Turn off the
equipment
and power
supply.
Please contact your dealer or service center.
CAUTION
Do NOT touch the exhaust outlet.
The fan revolves at high
speed and could cause
injury.
It is very hot and could
cause a burn.
4
CAUTION
Do NOT spray the units with an
infl ammable spray.
Please do NOT place or
use combustible sprays
near or on the units.
It could lead to ignition.
Forbidden Forbidden
Do not use cold-hot water or
chilled water for drinking or in the
hot-water supply.
Such use can cause health
problems.
Forbidden Fill with
Please do NOT use the unit for
a particular cooling applications
such as food supplies, animals
and plants, precision machinery or
objects of art: things that need a
special preservation requirement.
It could cause a
deterioration in the quality
of food stuffs and so forth.
When shutting down for extended
periods or not using in the winter
months, fi ll the water pipe with
antifreeze agent or drain all water
from the pipes.
Leaving water in the pipes
can cause water leakage
and other problems.
Antifreeze
Agent, or Drain
the Water
Use cold-hot water or chilled water
that complies with water quality
standards.
Deteriorated water quality
can cause water leakage
and other problems.
Use standard
compliant
water
Make no changes in the safety
device settings.
Faulty changes can cause
fi res or other mishaps.
Forbidden
For valves, follow the directions in the instruction manual, the Attention Installation Work Coordinators and
Attention Test Operation Coordinators pages, confi rming open/closed status.
In particular, always keep security valves (such as safety valves) open during
operation. Mistaken valve operation can cause water leakage, fi re, explosions
and other mishaps
Confi rm Valve
Open/Closed
Status
Adjustment valve closed
Please do NOT operate
the remote control with a
pointed object.
It could damage
the remote
control.
Forbidden
Do NOT block the inlet
or the outlet of both the
indoor and outdoor unit.
It could result
in a loss both
of cooling and
heating. It could
Forbidden
also lead to
damage to the
equipment.
REQUESTS
Please obey the following regarding the power source installed nearby the unit:
• Please do NOT operate the equipment with the at hand power source.
Your air conditioner is a multi-type air conditioner.
If you turn off one of the power sources installed near by the unit, all the units with the same power
source will become inoperable.
• Please turn on the power switch at least 5 hours before operating the air conditioner. In order to
protect the compressor, the crank case heater is provided. Please be sure to carry out the following:
At inspection times or
when you want to use
The air conditioner turn
Power Source
• During maintenance, turn the power switch OFF.
• During seasons of use please do NOT turn the power switch OFF.
the switch ON at least
5 hours beforehand.
• Be careful about cold water (hot water) freezing.
When operating heaters in cold districts (regions where outdoor temperatures remain below 0°C),
adding an antifreeze agent to the cold water (hot water) system will increase anti-freezing effects.
We recommend use of a proper antifreeze agent for this purpose, following consultation with the
dealer where the unit was purchased.
In such cases as well, conduct either “water draining” or “pump antifreeze operation when heating
operation is shut down.”
Leave the switch ON
during the seasons you
use the equipment.
Switch ON Switch OFF
Turn the switch OFF
during the seasons
you don’t use the
equipment.
5
NAMES OF PARTS
Water Heat Exchanger
6
Remote Controller CZ-RTC2 (Available Separately)
Operating buttons
13
1
12
11
10
9
8
1. Start/Stop button
2. Operation lamp
3. Mode Select button
4. Temperature setting buttons
2
3
4
5
6
7
Operation Section
Pushing this button starts, and pushing again stops the unit.
This lamp blinks when an error occurs or aprotective device
is activated.
Pushing this button to select an operation mode.
(AUTO /HEAT /DRY /COOL /FAN ).
Changing the temperature setting.
5. FAN speed button
6. Swing/Air direction button
7. Unit Select button
8. Timer setting buttons
9. FILTER reset button
10. Ventilation button
11. Inspection button
12. Sleeping button
This button is not available.
This button is not available.
When more than one unit is operated by one remote control
unit.
Use these buttons to set the timer program.
(Refer to "Weekly Program Function" on page 13)
This button is not available.
Use this button when you installed a fan available in the
market. Pressing this button turns on and off the fan.
When turning off the unit, the fan will be also turned off.
Do not use this button.
Refer to "Sleeping Function" on page 19.
7
15
10
Display
121 2 5 73 86 9 31104 11 13
2830 18192122
29 26
1. SETTING indication
2. UNIT indication
3. TIMER No. indication
4. Timer program
5. Today's day of the week
6. Program schedule indication
7. Present time
8. TIMER OFF indication
9. ERROR indication
10. Setting temperature indication
11. Upper and lower limit indication
of the temperature
12. Operation Mode indication
13. Temperature indication
14. ˚F / ˚C temperature unit indication
15. Remote control sensor indication
16. Centralized control indication
Operation mode change controlindication
17.
18. Disabled Feature indication
19. GHP operation standby indication
20. Heating standby mode indication
21. Fan mode select indication
22. SWING indication
23. Flap position indication
24. Filter indication
25. Inspection indication
26. Ventilation indication
27. Oil indication
28. Repetitive TIMER OFF
29. CAUTION
30. Unit No. indication
31. TEST indication
15 141617232527
2024
Display Section
Appears when the timer program is being set.
Indicates the unit No. of the water heat exchanger unit and outdoor unit which is
selected with the Unit Select button.
Appears when the time program is being set.
The unit starts or stops operation at the programmed time.
Indicates today's day of the week.
Appears under days that are scheduled for program operation.
Displays the present time on a 24-hour clock.
Indicates the alarm code when the unit in which an abnormality occurs.
Displayed when the timer has been turned OFF.
Displayed when a mistake is made during timer setting.
Appears when the upper or lower limit of the temperature is being set manually.
: Indicates the upper limit of the temperature
: Indicates the lower limit of the temperature
Displays the selected operation mode.
Indicates the set temperature.
Indicates the the temperature unit.
Appears when the remote control sensor isused.
Appears when operated in centralized control. If the remote control operation is
not permitted to the remote unit, when the Start/Stop button,Mode Select button
or Temperature setting button is pressed, flashes and rejects the change.
Displays when an operation mode is enteredby the remote control unit,
This indicates that the operation mode cannot be changed.
Displayed if the selected feature was disabled during installation.
Appears when the indoor unit fan is stopped or in low fan speed.
Appears when the indoor unit fan is stopped or in low fan speed.
The selected fan mode is displayed.
This functions is not used.
This functions is not used.
Appears when filter needs cleaning.
Appears when the protective device is activated or when an abnormality occurs.
Appears when a fan available in the market is installed and is operating.
Appears when the engine oil needs to be changed.
Appears when the timer is setted.
Appears when the protective device is activated or when an abnormality occurs.
Indicates the unit No. of the selected indoor unit or the unit No. of the
indoor/outdoor unit which an abnormality occurs.
Appears while in test operation.
8
OPERATION
Setting the Present Time
1. Press and hold for more than 2 seconds to enter in the
present day and time setting mode.
Once you enter in the setting mode,
“time” flash.
, “ ”(day) and
2. Set “
Press
display) in the order of : Su → Mo → Tu → .... Press
to move it in the order of : Su → St → Fr → ....
*1
3. Press
Set the present hour and press
The “hour” digits light up, and the “minute” digits start flashing.
*2
4. Press
Set the present minute and press
setting mode.
” to today’s day of the week.
*1 to move “ ” (flashing on the
1,3,43,4 2
While in time setting mode, the temperature setting
buttons function as
to change the present “hour” in the range of 0 to 23*2.
If the clock uses the 12 hours AM/PM setting, the hour is displayed in the
range of AM 0 to 11/PM 0 to 11.
, to change the present “minute” in the range of 0 to 59.
(changing day) button.
.
. The day and time are set and finishes the
Note
• The unit returns to the normal mode if is pressed or there is no operation made for 3 minutes
during the setting. In this case, all the settings in progress will be lost.
• If the present time is invalid, “– – : – –” is displayed.
If the power failure for more than 1 hour occurs, check if the set data of day and time are valid.
9
Weekly Program Function
Checking Weekly Timer
Set the weekly program assigning a given timer to each day of the week.
Maximum of 6 programs a day and 42 programs a week can be set.
Select the day and the TIMER number you want to program.
Program image diagram
Ver tical scale indicates the
TIMER No., and horizontal scale
indicates the day.
* If the day is changed, the
TIMER No. returns to “1”.
1. Press
” and start setting.
“
to enter the program confirmation mode
TIMER No.
Su Mo Tu We Th Fr Sa
1
2
3
4
5
6
Once you enter the program confirmation mode, the present
day is indicated as TIMER No. “1”.
2. Select the day.
Press
and / to move the “ ”
horizontally on the day to select.
Press
order of : Su Mo Tu
Press
to move “ ” (flashing on the display) in the
...
.
to move it in the order of : Su → Sa → Fr
“– – : – –” is displayed when the program is not set.
button
...
.
Select a section from
the 42 programs.
31
3. Select a Timer number.
Press
Press
Press
/ to select a TIMER No. from 1 to 6.
to move up from 1.
to move down from 6.
10
program CHeck
TIMER No. 1~6
2
s Changing the Program Timer
To set the weekly program, follow the steps below.
1. Select the program you want to set in the program
confirmation mode, and press
setting mode of the program currently displayed.
* In the program setting mode,
and “item” flash on the display.
. The unit enters the
, “hour”, “minute”
2,3,4
1,2,3,4 4
2. Set the “hour”. (program step 1)
Press
Confirm the “hour” and press
mode
3. Set the “minute”. (program step 2)
Press
Confirm the “minute” and press
pattern selection mode).
/ to set the “hour”.
. The unit enters the program changing
(setting of the “minute”).
/ to set the “minute”.
.The unit enters (the program
normal remote controller
PROGRAM CANCEL
Program
CANCEL,DEL
program check
CANCEL,DEL
Program step1
Program step2
SET
Changing hour digits
SET
Changing minute digits
SET
SET,CANCEL,DEL
PROGRAM
CANCEL
SET,CANCEL
Changing patterns
Selecting copy source
SET
Selecting copy destination
11
4. Set the program pattern.
(program step 3)
There are 4 program patterns.
Pressing
display patterns.
Pattern 1
The water heat exchanger unit starts
operation at the programmed time.
Pattern 2
The water heat exchanger unit stops
operation at the programmed time.
Pattern 3
The water heat exchanger unit starts
operation at the programmed time and
changes the temperature settings.
Press
temperature setting.
/ repeats the following
/ to change the
Pattern 1
Pattern 2
Pattern 3
Pattern 4
Pattern 4
The water heat exchanger unit changes the
temperature setting at the programmed time.
Press
temperature setting.
Select the program pattern and press . The program timer setting is confirmed and the unit enters the
confirmation mode
/ to change the
.
Note
s If you press during the setting, it returns to the program confirmation mode.
s If there is no operation made for 3 minutes during the setting, it returns to the normal mode.
In this case, all the settings in progress will be invalid.
12
• Deleting the Program Timer
To delete the program timer setting, follow the steps below.
1. Press
2. Press
program you want to delete.
3. Press
4. Press
5. Press to delete the program.
to enter the program confirmation mode.
/ to select the day of the
/ to select a TIMER No. (from 1 to 6).
to display the program setting mode .
43512
Note
• After deleting, the unit returns to the program confirmation
mode
• If you press
program comfirmation mode.
• If there is no operation made for 3 minutes during the setting, the unit returns to the normal mode.
•Invalidating Program Timer
.
during the setting, the unit returns to the
If you want to adjourn the program operation for more than 1 week, you can invalidate all the timer settings.
Once the timer settings are invalidated, the program will not be operated until the invalidation is cancelled.
<<How to invalidate the program timer>>
Press and hold for more than 2 seconds.
is displayed and the programs will be invalidated from the next one.
<<How to cancel the program timer invalidation>>
Press and hold
disappears and the programs will be validated from the next one.
If Power Failure Occurred
If the power recovers in a short time period, the program after the recovered time will be valid.
If the power recovered more than 1 hour after the failure, the present time information will be lost. In this
case, the program will not be operated.
for more than 2 seconds.
13
• Duplicating the Program Timer
You can duplicate the preset program by day.
Select the copy source.
1. If is pressed in program checking mode , it
enters the copy mode (Selecting the copy source
the program timer.
While in the copy mode of the program timer,
and (day) of the copy source flash on the display.
) of
2. Press
source.
Select the copy destination.
3. If
is pressed in the mode of selecting the copy source
, it enters the copy mode (Selecting the copy
destination
4. Press
source. Then, press
the program checking mode.
Note
The program will be overwritten if the preprogrammed day is selected as a copy source.
• Before Asking Repair Work
Before asking repair work, please check the followings.
“ERROR” is displayed when
the minute digits are entered.
The set data is not stored.
Program does not function.
/ to select the day of the copy
) of the program timer.
/ to select the day of the copy
to complete copying and return to
Trouble
If there is another TIMER No. which has the program of the same time and same day,
you cannot overlap the setting.
The stored programs are automatically sorted by the time. Check if the data is stored in
the other TIMER No.
Check if the time indication is not “– – : – –”.
When the time is invalid, the program is also invalid.
Check the remote controller prohibition inside.
In that case, the program is invalid.
Possible Cause/Remedy
3,51 2,4
Setting temperature
This function is not used.
14
Sleeping Function
* This function leads you to a comfortable sleep
and changes the room temperature during
your sleep.
*
You can set the off timer every one hour from 1
to 10 hours.
Operating time
Sleeping function
indication
Display of remote control unit
(during repetitive timer OFF function setting)
Sleeping function indication
Display of remote control unit
(during the time setting)
Off time
In case the present time
is 23:00.
When the off time comes:
• The water heat exchanger unit stops..
* The temperature returns to the setting at
the time when sleeping function operation
started.
To cancel the sleeping function operation:
• Press
.
* The temperature setting remains at the
time cancelled.
• The following buttons also cancel the
sleeping function operation.
button
Stop the water heat exchanger unit after the
sleeping function operation is
cancelled.
button
Changes the operation mode after the
sleeping function operation is cancelled.
* If no operation is made for 3 minutes, the time
setting mode will be automatically finished.
Ex. In case of 7 hours timer
1. Press
.
• Each time the button is pressed, the indication
changes in the following order.
(every one hour)
(Press to stop the time setting.)
2. Press .
• The sleeping operation starts.
15
• If button does not work.
Or if the operation does not start even if is pressed.
Check the following table.
Item
Display of the remote control unit
(Lighting/flashing indication)
Contents
1
2
3
(for several seconds).
lights up (for several seconds).
(for several seconds).
The Error indication flashes
“This function is not available” indication
Centralized control indication flashes
The clock is not set.
When the operation mode is set to AUTO or
FAN, this function is not available.
The centralized control device is prohibited from
starting/stopping the unit or change the
temperature setting.
The sleeping function operation will be cancelled in the following cases:
1: When the unit is operated to stop or change the temperature setting by the other remote control
unit or centralized control device.
2: When the unit is operated to stop or change the temperature setting with the weekly program
function.
3: When the centralized control unit is prohibited from stopping the unit or changing the temperature
setting .
Note
Trouble
Possible Cause/Remedy
The temperature setting does not decrease (increase).
Operation under the sleeping function does not finish.
The temperature over the upper or lower limit or each
operation mode cannot be set.
Note if you change the time after the sleeping function
started. The operation does not finish until it reaches to
the set starting time.
16
CARE AND CLEANING
At the first of the season
REQUESTS
When cold water (hot water) passes through the unit for an extended period of time, scales
will collect inside the heat exchanger and impede the performance level. This can result in
breakdowns, and creates the need to remove the scales with a chemical cleaner. Consult
with the dealer where the unit was purchased or a service company, and arrange to have
Clean
At the end of the season or when not using for an extended period
• Remove dirt collected in the drain pan, then rinse with water to cleanse out the dirt inside the drain pipe.
• Turn the local power supply switch on the gas heat pump unit to OFF.
• Fully close the fuel gas main valve.
• When water-draining, remove the water so that none remains inside the unit, the cold water (hot water) pipes,
pump, fan coil units and other components. For further details, inquire at the dealer of purchase or a service
company.
the heat exchanger cleaned or take other necessary steps.
Caution
• During winter or when temporarily suspending heating operation, take measures to prevent the water
inside the cold water (hot water) system from freezing.
When temporarily suspending heating operation in cold districts and not performing "water-draining," turn the
local power supply switch (unit and pump) to "ON" to prevent freezing. When these switches are left "ON,"
declines in temperature will cause the pump to automatically activate and circulate the water, thereby preventing
freezing. (Based on the premise that electric wiring work has been performed in accordance with the electric
circuit diagram attached to the unit.)
For "water-draining," refer to the "Caring for the Unit" page.
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POINTS TO CONFIRM FOR INSTALLATION
Maintenance Space
The dimensions indicated in the following diagram are necessary for the unit to function correctly and to conduct
periodic inspections.
Refrigerant pipe
side
Water heat exchanger unit
10
30cm or more
5cm or more
60cm or more
Outdoor unit
1m or more
35cm
or more
2m or more
Water Pipes
Cautions
• Connect the cold water (hot water) outlet and inlet and the drain opening to the pipes at a caliber equal to or
greater than that of the unit connecting mouth.
• Install the cold water (hot water) pipes near the main unit using a union joint or flange joint, making it easy to
separate the main unit.
• Always insulate the cold water (hot water) pipes with insulation materials.
• Install a water temperature gauge and cold water (hot water) flow rate adjustment valve to the cold water (hot
water) pipe, thereby enabling adjustments of the cold water (hot water) flow rate to be made while monitoring the
water temperature gauge during test operation. Do not touch the adjustment valve after performing adjustments.
• Adjust the hydraulic pressure on the water heat exchanger to 0.7MPa or below.
• Attach a water-draining use pipe.
• Always install an expansion tank inside the cold water (hot water) system.
18
Authorized representative in EU
Panasonic Testing Centre
Panasonic Marketing Europe GmbH
Winsbergring 15, 22525 Hamburg, Germany
DG0312-0
Printed in Japan
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