Gree KFRS-9/Na-M User manual

Combination Heat Pump Water Heater
Usage and Installation Manual
This manual is suitable for the unit:
KFRS-9/Na-M
GREE ELECTRIC APPLIANCES ， INC . OF ZHUHAI

Usage and Installation Manual for Combination Heat Pump Water Heater
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CONTENT
1.Usage notice ..................................................................................................... 3
2. Working principles and instruction to the unit ................................................ 5
3. Features of the unit .......................................................................................... 6
4. Structure of the unit ......................................................................................... 7
5. Dimension of the unit ...................................................................................... 8
6.Technical parameters ...................................................................................... 10
7.Operation range .............................................................................................. 11
8.Installation of outdoor unit ............................................................................. 12
9.Installation of water tank ................................................................................ 13
10. Connection of pipeline ................................................................................ 14
11.Wiring diagram............................................................................................. 17
12.Controller usage instruction ......................................................................... 19
13.Check before trial running............................................................................ 25
14.Trail running................................................................................................. 25
15.Daily operation and maintenance ................................................................. 26
16. Common errors and solutions...................................................................... 27

Usage and Installation Manual for Combination Heat Pump Water Heater
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Usage and Installation Manual for Combination Heat Pump Water Heater
1.Usage notice
Dear users:
Thank you for choosing our Heat Pump Water Heater. Please read this manual carefully
before installation to install and use the unit correctly according to the following procedure.
Specially remind you meaning of the following marks:
Warning! Means incorrect operation may cause injuries and deaths or badly hurt.
！
Notice! Means incorrect operation may cause injuries or property loss.
！
Warning!
！
1、Only parts and components specified by our company can be used. Installation and technical
service should be performed by authorized dealers. Improper installation may cause water
leakage, electric shock, fire, and so on, so you yourself never repair the unit to avoid electric
shock, damage to controller and so on. Please contact with our company or dealer to repair the
unit.
2、Electric control cabinet must be installed firmly to avoid injury or damage to electric elements.
3.、The power must be supplied with specified wires which never can shared by other electric
appliances to avoid overload. Fuse or breaker must match with working voltage of unit.
4.、The unit must be reliably grounded. Never connect ground wire with neutral line, water pipe, gas
pipe, lightning conductor or ground wire of telephone to avoid electric shock. The ground wire
of unit and grounding electrode should be frequently checked to ensure its reliability.
5.、The unit is equipped with a leakage protector to ensure normal operation of the unit and an
additional electric heater with 9kW.If electric heater above 9kW is needed, appropriate leakage
protector should be selected according to local rules to avoid frequent leakage protection, fail
safe or electric shock.
6.、Never use or store flammable and explosive products near the unit.
7、Please cut off the power of the unit immediately when malfunction (such as burning odor is
smelled) occurs.
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Usage and Installation Manual for Combination Heat Pump Water Heater
8、Don’t insert finger or things into exhaust vent or air-inlet grille.
9、Don’t turn on or turn off the unit by inserting or plugging out power cord.
10、Don’t refit the unit. Please contact with dealer or professional installation personnel when the
unit needs to repair or move.
11、This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been
given supervision or instruction concerning use of the appliance by a person responsible for
their safety.
12、Children should be supervised to ensure that they do not play with the appliance.
13、This product must not be disposed together with the domestic waste. This
product has to be disposed at an authorized place for recycling of electrical and
electronic appliances.
Notice!
！
1、Before installation, please check if the adopted power is accordance with that listed on nameplate,
and check the safety of power.
2、Before using, please check and confirm if wires and water pipes are connected correctly to avid
water leakage, electric shock or fire etc.
3、Don’t operate the unit with wet hand, and don’t allow children to operate the unit.
4、The On/off in the instruction is for the operation to on and off button of PCB for users; cut off
power means to stop supplying power to the unit.
5、Don’t directly expose the unit under the corrosive ambient with water or dampness.
6、Don’t operate the unit without water in water tank .The air outlet/inlet of unit can not be blocked
by other objects.
7、The water in unit and pipeline should be discharged if the unit is not in use, to prevent the water
tank, pipe line and water pump from frost-cracking.
8、Never press the button with sharp objects to protect manual controller. Never use other wires
instead of special communication line of the unit to protect control elements. Never clean the
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Usage and Installation Manual for Combination Heat Pump Water Heater
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manual controller with benzene, thinner or chemical cloth to avoid fading of surface and failure
of elements. Clean the unit with the cloth soaked in neutral eradicator .Slightly clean the display
screen and connecting parts to avoid fading.
9、To be in compliance EN 61000-3-11,the product shall be connected only to a supply of the
system impedance:|Zsys|=0.391 ohms or less.Before connect the product to public power
network, please consult your local power supply authority to ensure the power network meet
above requirement.
If there is any question, please contact with local dealer, authorized service
center, agencies or our company directly.
2. Working principles and instruction to the unit
Heat pump water heater mainly consists of scroll type compressor, water side heat exchanger,
air side heat exchanger, thermal expansion valve and 4-way valve. In addition, air side heat
exchanger is air-cooled fin heat exchanger and water side heat exchanger external finned copper fan
coil Heat energy of air in air side heat exchanger is sucked by low temp and pressure refrigerant and
then is compressed by compressor into high temp and pressure gas, at last is released into water in
water tank through water side heat exchanger.( hot water in water tank will secondly exchange with
living water in the other copper pipe so that recycled water heated secondly is provided for users
through water circulation system. Hot water in water tank is mainly for heating of air conditioner.
And an additional set of external finned copper fan coil is reserved for solar collection.)This unit is
applicable for hot water supply system whose core is heat pump water heater and can intelligently
provide continuous, reliable, healthy hot water for user. The hot water is usually at 45℃～60℃.It is
widely used in hotel,hospital, school, residence, natatorium and so on.
Working principle: Refrigerant vaporizes by sucking heat energy of air in finned heat
exchanger .After that, it is compressed into high temp and pressure gas after returning into
compressor .The gas releasing heat energy into water in water tank is condensed into middle
temperature and high pressure liquid, which becomes to low temp and pressure gas-liquid mixture
through throttling. Gas-liquid mixture vaporizes by sucking heat energy of air in finned heat
exchanger and return into compressor. In cycles, water in water tank continuously sucks heat energy

Usage and Installation Manual for Combination Heat Pump Water Heater
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of refrigerant at certain temp to meet water supply requirements.
The unit is equipped with multi-function insulating water tank in which three sets of finned coil
are set. One set of finned coil is for refrigerant heating water in water tank, and the other one is for
living water which is heated secondly by water in water tank to ensure cleanliness, health, comfort.
The last one is for solar heat exchanging return circuit, which can match with solar energy for heat
exchange. In addition, two ports for electric heating are reserved. In low temp condition, electric
heating can be operated according to requirements to ensure normal hot water supply.
3. Features of the unit
High efficiency and energy saving
Large number of heat energy got from the air consumes electric energy which only equals to the
energy of compressor carrying air and sunshine energy. The electricity consumption of heating
water is 1/3 or lower of that of traditional electric heater. (Actual consumption is according to
outdoor ambient temp.)
Environmentally friendly
Solar energy, heat energy of air and electricity energy adopted by the unit is clean and
pollution-free. Environmental-friendly refrigerant has no bad effect to the atmosphere.
Safe and reliable
This unit hasn’t hidden troubles like gas toxicosis caused by gas water heater and electrical
leakage caused by electrical water heater, which is safe, reliable and long-life. Maintenance cost
is low.）
High quality
The main parts of the unit are all famous brands. Each unit was strictly tested in factory to
ensure its quality.
Multi functions
Hot water produced by heat exchange between water in tank and refrigerant can be used by the
air conditioner to heat. With solar energy and electric heating it makes the unit more
energy-saving. The electric heating tube ensures supply of heating water even in low-temp
environment.
Healthy and comfortable

Usage and Installation Manual for Combination Heat Pump Water Heater
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Water for washing is obtained from the second heat exchange of water in water tank is healthy
and temperature suitable to keep people comfortable
Friendly man-machine interface
The host unit displays in English through which various data can be consulted. If there is
malfunction, error code will be automatically displayed so that repair and maintenance are very
convenient.
Easy installation
The unit is easy to be installed on or in rooftop, balcony, garage, kitchen, stock room, basement
and so on without taking charge and special machine room.
4. Structure of the unit
The unit mainly consists of host unit and Multi-function insulating water tank.
Parts of host unit:
——compressor
——4-way reversal valve
——External balanced heating power expanding valve
——High-pressureaccumulator
——Gas-liquidseparator
—— Finned copper tube heat exchanger
——Axialflowfan
——High-pressureswitch
——Low-pressureswitch
——Cut-offvalve
——Refrigerantpipe
——Thermalsensor
——Controlsystem
Main parts of Multi-function insulating water tank :
——Metal shell
——stainlesssteelcontainer
——External finned copper tube for heat exchanging
——Screwedjoint
——Safetyvalve

Usage and Installation Manual for Combination Heat Pump Water Heater
5. Dimension of the unit
Dimension of host unit
KFRS-9/Na-M: Unit：mm
572 412
378
840
340950
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