Cooper & Hunter GRS-C3.8/NbA-K User manual

Please read this manual carefully before using this product and keep it properly for future reference.
GRS-C3.8/NbA-K
GRS-C5.0/NbA-K
Direct & Circulating Air Source
Heat Pump Water Heater Technical
Air Source Heat Pump
Water Heater
Air Conditioners
Installation and Operation Manual
Designed by Cooper&Hunter International Corporation, Oregon, USA
www.cooperandhunter.com
MODEL:

To Distinguished Users
Thank you for choosing C&H air source heat pump water heater. In order to use this product
safely, please read this Instruction carefully and pay special attention to cautions before and during
installation. C&H air source heat pump water heater is a kind of technical electronic appliance, so
its installation and maintenance should be performed by professionals and the user can contact local
service center for help. Copyrights and interpretation right of this Instruction is owned by C&H.
If the unit is not used for a short time in winter, please keep 24hr power supply for the unit. If
it is not in used for a long time, drain water in unit, water tank and pipeline to avoid freeze crack.
If it is not convenient to operate the unit, please contact service center.
This appliance is not 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.
Children should be supervised to ensure that they do not play with the appliance.
This mark means the items which should be forbidden.
This mark means the items which should be conformed.
This mark means the items which should be noticed specially.

Contents
1 Accessory Parts ............................................................................................ 1
2 Cautions for Operation.................................................................................. 2
3 Specication and Technical Parameters........................................................ 4
4 Principle and Features of Product ................................................................ 5
4.1 Introduction of Principles ....................................................................... 5
4.2 Features of Unit ...................................................................................... 5
5 Instruction to Functions and Operation of Wired Controller ....................... 6
5.1 Main Functions of Wired Controller ....................................................... 6
5.2 Touch Buttons of Wired Controller ........................................................ 7
5.3 LCD Display of Wired Controller .......................................................... 7
5.4 Instruction to Operation of Wired Controller ......................................... 8
5.5 Notices for Operation of Wired Controller ........................................... 11
6 Installation................................................................................................... 12
6.1 Notices for Installation ......................................................................... 12
6.2 Installation of Main Unit of Water Heater ............................................. 12
6.3 Installation of Insulated Water Tank ...................................................... 13
6.4 Connection of Waterway System........................................................... 14
6.5 Installation Sketch of Unit .................................................................... 15
6.6 Electric Connection .............................................................................. 16
6.7 Installation of Wired Controller............................................................. 17
7 Debugging of Complete Unit ..................................................................... 18
8 Addition and Discharge Methods of Refrigerant ....................................... 20
9 Operation Performance of Unit................................................................... 21
9.1 Hot Water Yield .................................................................................... 21
9.2 Defrosting During Hot Water Operation ............................................... 22
9.3 Re-startup after Long-time Stop .......................................................... 22
9.4 About Power Failure ............................................................................ 22
9.5 Power-off Memory Function ................................................................. 22
9.6 Leakage Switch ..................................................................................... 22
10 Cautions for Operation in Winter.............................................................. 22
11 Care and Maintenance............................................................................... 23
11.1 Periodical Cleaning of Water Tank ...................................................... 23
11.2 Maintenance of Unit ............................................................................ 23
11.3 Disposal ............................................................................................... 23
12 Troubleshooting ........................................................................................ 24

Air Source Heat Pump Water Heater
1
1 Accessory Parts
Name Qty Remarks Mark
Main unit 1 A
Water tank 1 A
Filter 1 A
Safety check valve 1 A
Manual discharge valve 2 A
Automatic discharge valve 1 A
Instruction 1 A
Joint 1 G 3/8 A
Drainage joint 1 A
Power cord with leakage module 1 A (GRS-C3.8/NbA-K);
B (GRS-C5.0/NbA-K)
Wrapping tape 1 A
Wired controller 1 A
Circulating water pipe / DN20 PPR B
Tankinlet water pipe / DN 15 PPR B
Tank
outlet water pipe / DN 15 PPR B
Air switch / B
Cut-off valve / B
A: Supplied by C&H.
B: Purchaser may get specied parts from any source.

Air Source Heat Pump Water Heater
2
2 Cautions for Operation
Please read the following contents carefully before operating.
WARNING
Once abnormality like burning smell
occurs, please cut off the power supply
immediately and then contact with
service center.
If the abnormality still exists, the unit
may be damaged and electric shock or re
may result.
Don't operate water heater with
wet hand.
Otherwise, it may cause electric
shock.
Before installation, please
see if the voltage of local
pla ce ac cor ds wi th th at
on nameplate of unit and
capacity of power supply,
power cord or socket is
suitable for input power of
this unit.
Special circuit must be adopted for
power supply to prevent re.
Do not use octopus multipurpose plug
or mobile terminal board for wire
connection.
Be sure to pull out the power
plug and drain the main unit
and water tank when water
heater is not in use for a long
time.
Otherwise, the accumulated dust
may cause overheating, fire or
freeze of water tank or coaxial
heater exchanger in winter.
Never damage the electric
wire or use the one which is
not specied.
Otherwise, it may cause
overheating or re.
Before cleaning please cut off the power
supply.
Otherwise, it may cause electric shock or
damage.
The power supply must adopt
special circuit with leakage
switch and enough capacity.
User can not change
power cord socket without
prior consent. Wiring
working must be done by
professionals. Ensure good
earthing and don't change
earthing mode of unit.