service section technical training december 2005

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Horizontal Water Source Heat PumpHorizontal Water Source Heat Pump

Service SectionService Section

Technical TrainingTechnical Training

December 2005 December 2005

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Horizontal Water Horizontal Water Source Heat PumpSource Heat Pump

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Introduction:What is Water Source Heat Pump?

Horizontal Water Source Heat Pump

Finned-tube heat exchanger

Water inlet

Water outlet

4 Way Valve

Compressor

Expansion device

Water-to-refrigerant heat exchanger

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Categories:1. Water Loop Heat Pump System

2. Ground Water Heat Pump System

3. Surface Water Heat Pump System

4. Ground Coupled Heat Pump System


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Water Loop Heat Pump Water Loop Heat Pump


• Most common configurationMost common configuration

• Re-circulating water loopRe-circulating water loop

• Cooling tower & boilerCooling tower & boiler

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Ground Water Heat Pump Ground Water Heat Pump


• Ground water from wellGround water from well

• Drained back to well, Drained back to well, drain, stream or lakedrain, stream or lake

• Stable throughout the yearStable throughout the year

• Limited by availability of Limited by availability of water table and aquifers in water table and aquifers in the groundthe ground

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Surface Water Heat Pump Surface Water Heat Pump


• Open or close loopOpen or close loop

• Open – water being Open – water being returned back to source or returned back to source or draindrain

• Closed – water being re-Closed – water being re-circulated in the closed circulated in the closed looploop

• Stable throughout the yearStable throughout the year

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Ground Coupled Water Heat Ground Coupled Water Heat Pump Pump


• HE is buried into the earthHE is buried into the earth

• Installation cost is highInstallation cost is high

• Massive & stable thermal capacityMassive & stable thermal capacity

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Water Loop Heat Pump System


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cooling towercooling tower

pumpspumps

plate-and-frameplate-and-frameheat exchangerheat exchanger

heat pumpsheat pumps

waterwaterdistributiondistributionlooploopboilerboiler

expansionexpansiontanktank

airairseparatorseparator

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32ºC32ºC[90[90ºF]ºF]

heat pumps inheat pumps incooling modecooling mode

cooling cooling tower ONtower ON

boiler offboiler off

Summer Operation Summer Operation

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Winter Operation Winter Operation

heat pumps inheat pumps inheating modeheating mode

16ºC16ºC[60[60ºF]ºF]boiler onboiler on

cooling cooling tower OFFtower OFF

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Spring and Fall Operation Spring and Fall Operation

boiler offboiler off

heat pumps inheat pumps inheating modeheating mode

heat pumps inheat pumps incooling modecooling mode

cooling tower cooling tower OFFOFF

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General Benefits of a WSHP SystemGeneral Benefits of a WSHP System


• Heat recovery offers energy savingsHeat recovery offers energy savings

• Individual space controlIndividual space control

• Performs both cooling and heatingPerforms both cooling and heating

• Flexibility – additional of heat pumpFlexibility – additional of heat pump

• Small amount of floor space requiredSmall amount of floor space required

• Unit failure does not affect the rest of the systemUnit failure does not affect the rest of the system

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WH-B/BR SeriesWH-B/BR Series

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1. Features

2. Handset & PCB

3. Control Algorithm

4. Installation

Content

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1. Features 1. Features 1.1 Product Information1.1 Product Information

1.2 Left / Right Handling 1.2 Left / Right Handling 1.3 Low Height Profile1.3 Low Height Profile1.4 Less Vibration Design1.4 Less Vibration Design1.5 No Outdoor Fan1.5 No Outdoor Fan1.6 Application Flexibility1.6 Application Flexibility1.7 Part Loading Capability1.7 Part Loading Capability1.8 Sequencing Control of Compressor1.8 Sequencing Control of Compressor

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1.1 Product Introduction1.1 Product Introduction - Water Cooled Product- Water Cooled Product

- Packaged types- Packaged types- Capacity: 3.4kW – 23.0kW- Capacity: 3.4kW – 23.0kW- 11,600 Btu/hr to 78,500 Btu/hr- 11,600 Btu/hr to 78,500 Btu/hr

MODEL WH011BR WH012BR WH015BR WH020BR WH025BR

NOMINAL COOLING CAPACITY kW 3.4 3.5 4.2 5.7 7.6Btu/h 11600 12000 14400 19500 26000

NOMINAL HEATING CAPACITY kW 3.8 3.7 4.3 5 8.4Btu/h 13000 12700 14800 17000 28800

MODEL WH030BR WH040BR WH050BR WH060BR WH070BR

NOMINAL COOLING CAPACITY kW 9.0 13.0 15.0 19.0 23.0Btu/h 30710 44360 51510 64820 78500

NOMINAL HEATING CAPACITY kW 9.5 15.5 17.0 20.5 23.0Btu/h 32410 52890 58000 69950 78500

1. Features1. Features

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1.2 Left / Right Handling1.2 Left / Right Handling


Left Handling

Right Handling

Product Nomenclature: e.g.

WH 12B/BR – AXAA

WH 12B/BR – AXLA

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1.3 Low Height Profile1.3 Low Height Profile


• Flexibility in installationFlexibility in installation

• WH 11B/BR using Horizontal WH 11B/BR using Horizontal CompressorCompressor

WH-B/BR Height (mm)

11 250

12 325

15 337

20 353

25 340

30 370

40 440

50 440

60 475

70 500

Height from 250mm to 500mm

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1.4 Less Vibration Design1.4 Less Vibration Design


• Double isolation PanelDouble isolation Panel

• Reduce noise and vibration transmissionReduce noise and vibration transmission

Upper Panel

Lower Panel

Compressor

Grommet

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1.5 No Outdoor Fan1.5 No Outdoor Fan


• Using tube in tube heat exchangerUsing tube in tube heat exchanger

• No visible outdoor unitNo visible outdoor unit

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1.6 Application Flexibility1.6 Application Flexibility


• Wide operating range of temperatureWide operating range of temperature

Cooling Mode

Minimum EWT = 13°C

Maximum EWT = 40°C

13°C EWT 40°C

Heating Mode

Minimum EWT = 15°C

Maximum EWT = 32°C

15°C EWT 32°C

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1.6 Application Flexibility1.6 Application Flexibility


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1.7 Part Loading Capability1.7 Part Loading Capability


• Only available for model WH 25B/BR ~ 70B/BROnly available for model WH 25B/BR ~ 70B/BR

• 2 stage loading capacity at 50% ~ 100%2 stage loading capacity at 50% ~ 100%

• Less noise during low load conditionLess noise during low load condition

• Energy savingEnergy saving

100

50

0

Comp. Loading %

Step Capacity

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1.8 Sequencing Control of Compressor1.8 Sequencing Control of Compressor


• Only available for model WH 25B/BR ~ 70B/BROnly available for model WH 25B/BR ~ 70B/BR

• Accumulative compressor operating time can be monitoredAccumulative compressor operating time can be monitored

• Even loading of the compressorEven loading of the compressor

• Improve compressor reliabilityImprove compressor reliability

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2. Handset & PCB 2. Handset & PCB 2.1 Handset2.1 Handset

2.2 PCB 2.2 PCB 2.3 Wiring Diagram2.3 Wiring Diagram

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2.1 Handset 2.1 Handset

Temperature Display

Operating Mode

Fan Speed

ON/OFF Switch

IR Receiver

“Sleep” Function

Timer Switch Setting

2. Handset & PCB2. Handset & PCB

SLM15ASLM15A

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2.1 Handset 2.1 Handset


Temperature Display

ON/OFF Switch

Temperature Setting

IR Receiver

Operating Mode

Timer Setting

Sleep Mode

Clock Setting

Fan Speed

APW04AAPW04A

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APM01CB APM02D

Single Compressor Twin Compressor

2.1 PCB2.1 PCB

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2.1 Wiring Diagram2.1 Wiring Diagram

SLM15A

APW04A

CN2 CN4 CN1OET OD ID ROOM

Dip Switch

WV

OF

L HF

MF

LF HEA

TA

SO

FH W

P

N LIV

E4

E3E2E1

LIVE

WLS

COMPRESSOR

L

SHHM

L

FS

L N E

COMP

N

WP

HEATER

4wv

S

R

C

FM

TRANSFORMER

OLP

APM01CB

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APM02D

COMP1

COMP2

L N E

N N LIVECOMP1

COMP2

HT/EV1

EV2

4WV2

4WV1

A-HAT

PUMP

H/FAN

M/FAN

L/FAN

AL/OUT

AL/INN-COM

4wv

4wv

WV

PUMP

FM

K1

K2

K3

CS

R

CS

R

KM1

KM2

KM1 KM2

K1 K2 K3

EN-SAVE

OVHT/HP2FREZ/LP2FLOWOV-PUMPOV-FAN

OV-COMP1OV-COMP2HP1

LP1

SET/SF

HP1

LP1

FSW

HP2

LP2

WLS

K3

K4

ELECTRICAL

HEATERK3

K4

Single Phase

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APM02D

COMP1

COMP2

T N E

N N LIVECOMP1

COMP2

HT/EV1

EV2

4WV2

4WV1

A-HAT

PUMP

H/FAN

M/FAN

L/FAN

AL/OUT

AL/INN-COM

4wv

4wv

WV

PUMP

FM

K1

K2

K3

CS

R

CS

R

KM1

KM2

KM1 KM2

K1 K2 K3

EN-SAVE

OVHT/HP2FREZ/LP2FLOWOV-PUMPOV-FAN

OV-COMP1OV-COMP2HP1

LP1

SET/SF

HP1

LP1

FSW

HP2

LP2

WLS

K3

K4

ELECTRICAL HEATER

K3

K4

R S

Three Phase

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3. Control Algorithm 3. Control Algorithm 3.1 Hardware Setting3.1 Hardware Setting

3.2 Unit ON / OFF3.2 Unit ON / OFF3.3 Sleep Function3.3 Sleep Function3.4 Indoor Fan Control3.4 Indoor Fan Control3.5 Operating Modes3.5 Operating Modes3.6 Protection3.6 Protection3.7 Self Diagnostic3.7 Self Diagnostic

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3. Control Algorithm3. Control Algorithm

3.1 Hardware Setting 3.1 Hardware Setting – Mode Selection– Mode Selection

APM01CBSpecification / Type 1 2 3 4Cooling Only 0 0 0 0Cooling Only + Electric Heater 1 0 0 0Heat Pump 0 1 0 0Heat Pump + Electric Heater 1 1 0 0

Dip Switch Setting

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APM02D


3.1 Hardware Setting 3.1 Hardware Setting – Mode Selection– Mode Selection

Specification / Type JP1 JP2 JP3 JP4 JP5Cooling Only Open Open Close Close CloseCooling Only + Electric Heater Open Open Close Open CloseHeat Pump Open Open Close Close OpenHeat Pump + Electric Heater Open Open Close Open Open

Jumper Setting

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3.2 Unit ON / OFF3.2 Unit ON / OFF2 ways to turn on / off the system:2 ways to turn on / off the system:

(a) On/Off Triggering(a) On/Off Triggering

• On/Off Button on LCD remote controllerOn/Off Button on LCD remote controller

(b) Real time On/Off Timer(b) Real time On/Off Timer

• Based on internal real time clockBased on internal real time clock

• The timer settings are kept so that similar switches can The timer settings are kept so that similar switches can occur 24 hours lateroccur 24 hours later

• If On/Off Button on the LCD remote controller being If On/Off Button on the LCD remote controller being pressed, the timer will be resetpressed, the timer will be reset

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3.3 Sleep Function3.3 Sleep Function

• Only available for COOL, HEAT & AUTO mode Only available for COOL, HEAT & AUTO mode

• This function will increase (cooling mode) or decrease This function will increase (cooling mode) or decrease (Heating mode) the set temperature with time(Heating mode) the set temperature with time

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3.3 Sleep Function (Cool Mode) 3.3 Sleep Function (Cool Mode)

SLEEP set onSLEEP set on SLEEP set offSLEEP set off

TsTs

Ts + 1/2Ts + 1/2

Ts + 1Ts + 1

Ts + 2Ts + 2

00 1/21/2 11 22

HoursHours

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3.3 Sleep Function (Heat Mode) 3.3 Sleep Function (Heat Mode) SLEEP set onSLEEP set on SLEEP set offSLEEP set off

TsTs

Ts - 3Ts - 3

Ts - 2Ts - 2

Ts - 1Ts - 1

00 1/21/2 11 22 HoursHours

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• Indoor fan speeds are Indoor fan speeds are LOW, MEDIUM, HIGHLOW, MEDIUM, HIGH or or AUTO FANAUTO FAN in in

COOL, HEATCOOL, HEAT and and AUTOAUTO modes. modes.

• In In FAN modeFAN mode, only , only HIGH, MEDIUMHIGH, MEDIUM and and LOW LOW speeds are speeds are allowed.allowed.


3.4 Indoor Fan Control3.4 Indoor Fan Control

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APM01CB:• Compressor will cut in if Tr – Ts > 0.5°C• Compressor will cut out if Ts - Tr > 1.0˚C

APM02D:• 1 compressor will cut in if Tr – Ts > 1.0°C• 2 compressor will cut in if Tr – Ts > 2.0°C

• 1 compressor will cut out if Tr = Ts

• 2 compressor will cut out if Ts – Tr > 1°C

Note: Tr = Room Temperature Ts = Set Temperature


3.5 Operating Modes 3.5 Operating Modes 3.5.1 Cool Mode3.5.1 Cool Mode

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3.5 Operating Modes 3.5 Operating Modes


APM01CB:• Compressor will cut in if Ts – Tr > 1.0˚C

• Compressor will cut out if Tr – Ts > 1.5°C

APM02D:• 1 compressor will cut in if Ts – Tr > 1.0°C

• 2 compressor will cut in if Ts – Tr > 2.0°C

• 1 compressor will cut out if Ts = Tr

• 2 compressor will cut out if Tr – Ts > 1.0°C

Note: Tr = Room Temperature Ts = Set Temperature

- Heat Pump Model- Heat Pump Model 3.5.2 Heat Mode3.5.2 Heat Mode

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• To run heat mode, 4-way valve MUST turn ON.To run heat mode, 4-way valve MUST turn ON.

• 4-way valve can only be changed from ON to OFF or vice-4-way valve can only be changed from ON to OFF or vice-versaversa

55 +/- 5 seconds after the compressor has cut out.55 +/- 5 seconds after the compressor has cut out.

• Compressor cut in after 4s.Compressor cut in after 4s.



(a) 4-Way valve Changing(a) 4-Way valve Changing 3.5.2 Heat Mode3.5.2 Heat Mode

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APM01CB:

• Thermostat cut in cycle:

- If Tin coil > 40˚C, indoor fan run at user set speed

- If Tin coil > 30˚C, indoor fan run at low speed

- If Tin coil < 15˚C, indoor fan stop

• Thermostat cut off cycle:

- If Tin coil > 40°C, indoor fan run at user set speed

- If Tin coil > 37°C, indoor fan run at low speed

- If Tin coil < 30°C, indoor fan stop

Note : TNote : Tin coilin coil = Indoor Coil = Indoor Coil

TemperatureTemperature



(b) Hot Keep / Start(b) Hot Keep / Start 3.5.2 Heat Mode3.5.2 Heat Mode

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APM02D:

• Thermostat cut in cycle:

- If either Tin coil > 37˚C, indoor fan run at user set speed

- If both compressors cut out,

and Tin coil < 30˚C, indoor fan stop

Note : TNote : Tin coilin coil = Indoor Coil Temperature = Indoor Coil Temperature



(b) Hot Keep / Start(b) Hot Keep / Start 3.5.2 Heat Mode3.5.2 Heat Mode

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AUTO Fan Speed during COOL modeAUTO Fan Speed during COOL mode

H M L M H M L L M HH M L M H M L L M H

COMP ON COMP OFF COMP ONCOMP ON COMP OFF COMP ON

+1.5+1.5+1.0+1.0+0.5+0.5TTss

-0.5-0.5-1.0-1.0

ooCCTTrr

3.5.3 Auto Fan3.5.3 Auto Fan

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TTrr AUTO Fan Speed during HEAT modeAUTO Fan Speed during HEAT mode

M H M L M H M LM H M L M H M L

+1.5+1.5+1.0+1.0

TTss

-1.0-1.0

-2.0-2.0

ooCC

COMPCOMPOFFOFF

COMP ONCOMP ONCOMP COMP OFFOFF

3.5.3 Auto Fan3.5.3 Auto Fan

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Under Auto mode, COOL & HEAT mode can be changed Under Auto mode, COOL & HEAT mode can be changed

automatically depending on room & set temperature.automatically depending on room & set temperature.



COOLCOOL HEATHEAT

I)I) TTrr <= T <= Tss - 3.5°C AND - 3.5°C AND

II)II) The compressor has cut out for at least 10 min.The compressor has cut out for at least 10 min.

IFIF

(a) If the present Auto mode is COOL,(a) If the present Auto mode is COOL, ( Mode Set Temperature = User Set Temperature)( Mode Set Temperature = User Set Temperature)

3.5.4 AUTO Mode3.5.4 AUTO Mode

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(b) If the present Auto mode is HEAT,(b) If the present Auto mode is HEAT, ( Mode Set Temperature = User Set Temperature)( Mode Set Temperature = User Set Temperature)

HEATHEAT COOLCOOL

IFIF

I)I) TTrr > T > Tss + 3.5°C AND + 3.5°C AND

II)II) The compressor has cut out for at least 10 min.The compressor has cut out for at least 10 min.


3.5.4 AUTO Mode3.5.4 AUTO Mode

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• APM01CB: APM01CB: - Run under COOL mode with Auto Fan Speed for 12 minutes - Run under COOL mode with Auto Fan Speed for 12 minutes OROR

- Run Until T- Run Until Trr T Tss – 1°C – 1°C

• APM02DAPM02D - Run under COOL mode with Auto Fan Speed for 18 minutes- Run under COOL mode with Auto Fan Speed for 18 minutes

OROR

- Run until Tr - Run until Tr Ts – 1°C Ts – 1°C

After the 12 minutes (AOM01CB) or 18 minutes (APM02D)After the 12 minutes (AOM01CB) or 18 minutes (APM02D)

• Run either Zone A, B, C or D (depend on temp. condition)Run either Zone A, B, C or D (depend on temp. condition)


3.5.5 Dry Mode3.5.5 Dry Mode

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ZONE AZONE A : if T: if Trr - T - Tss > 2 > 2 o o CC

12 Minutes12 Minutes


CompressorCompressor

Low FanLow Fan

ONON

OFFOFF

ONON

OFFOFF


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ZONE BZONE B : : if 0°C < Tif 0°C < Trr - T - Tss < 1°C < 1°C

8 min8 min 4 min4 min

30 sec30 sec 30 sec30 sec

ONON

OFFOFF

ONON

OFFOFF




Low FanLow Fan


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ZONE CZONE C : : if 1°C < Tif 1°C < Tss - T - Trr < 2°C < 2°C

30 sec30 sec 30 sec30 sec 12 Minutes12 Minutes

6 min6 min 6 min6 min


ONON

OFFOFF

ONON

OFFOFF


Low FanLow Fan


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ZONE DZONE D : : if if TTss - T - Trr > 3°C > 3°C

Low FanLow Fan


30 sec30 sec


ONON

OFFOFF

ONON

OFFOFF



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3.6 Protections 3.6 Protections

3.6.1 Compressor 3.6.1 Compressor

3.6.2 Indoor Coil Anti Freeze3.6.2 Indoor Coil Anti Freeze

3.6.3 Outdoor Fan Speed Control3.6.3 Outdoor Fan Speed Control

3.6.4 Water Temperature3.6.4 Water Temperature

3.6.5 Suction Temperature3.6.5 Suction Temperature

3.6.6 Self Diagnostics3.6.6 Self Diagnostics


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3.6 Protection 3.6 Protection

(a) 3 minutes Minimum ON time(a) 3 minutes Minimum ON time

- The compressor has a minimum 3 minutes run times before - The compressor has a minimum 3 minutes run times before it can be cut off it can be cut off

(b) 3 minutes Minimum OFF time(b) 3 minutes Minimum OFF time

- The compressor can only cut in after a minimum period of 3 - The compressor can only cut in after a minimum period of 3 minutes from the time it cuts offminutes from the time it cuts off

3.6.1 Compressor3.6.1 Compressor

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(c) Hardware Switch Detection(c) Hardware Switch Detection

• High / Low Pressure Switch (NC)High / Low Pressure Switch (NC)

• If the contact opened for 2 seconds, the compressor will If the contact opened for 2 seconds, the compressor will

cut OFFcut OFF


3.6 Protection3.6 Protection 3.6.1 Compressor3.6.1 Compressor

WH11~25B/BR WH30~70B/BR

NC NC

OPEN psi 426 405

CLOSE psi 340 348

NC NC

OPEN psi 7 7.25

CLOSE psi 22 21.7

LOW PRESSURE SWITCH

TYPE

HIGH PRESSURE SWITCH

TYPE

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3.6 Protection3.6 Protection

Available in COOL and DRY mode, Available in COOL and DRY mode,

if compressor has been running for > 10 minutes and Tif compressor has been running for > 10 minutes and T in coilin coil

0°C for at least 60 seconds – Indoor fan will run at high 0°C for at least 60 seconds – Indoor fan will run at high speedspeed

After 5 minutes After 5 minutes

• IFIF T Tin coilin coil < 0°C for at least 5 seconds, compressor will stop < 0°C for at least 5 seconds, compressor will stop

but indoor fan will remains at high speedbut indoor fan will remains at high speed

• IFIF 0°C 0°C T Tin coil in coil 5°C, compressor remains running and 5°C, compressor remains running and

indoor fan will remains at high speedindoor fan will remains at high speed

• IFIF T Tin coilin coil > 5°C, indoor fan run at user set speed > 5°C, indoor fan run at user set speed

3.6.2 Indoor Coil Anti Freeze3.6.2 Indoor Coil Anti Freeze

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3.6 Protection3.6 Protection 3.6.3 Gas Leak Detection3.6.3 Gas Leak Detection

Comp run 5 mins

Tin coil Tr – 3°C (Cooling)Tin coil Tr + 3°C (Heating)

Sound Alarm

Y

N

Error Fixed?

Y

Compressor StopCooling : Indoor fan runHeating : Indoor fan stop

5 mins

N

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Under COOL, DRY or Auto COOL Modes,Under COOL, DRY or Auto COOL Modes,

• Compressor will NOT run and alarm will be activatedCompressor will NOT run and alarm will be activated

- IF T- IF Tww 13°C or T 13°C or Tww 40°C for at least 20 seconds 40°C for at least 20 seconds

• Compressor will shut down and alarm will be activatedCompressor will shut down and alarm will be activated

- IF compressor has been running for 20 seconds and - IF compressor has been running for 20 seconds and

TTww > 47°C for 20 seconds > 47°C for 20 seconds

• Compressor will run and alarm will be deactivatedCompressor will run and alarm will be deactivated

- IF 13°C - IF 13°C T Tww 40°C 40°C

3.6.4 Water Temperature, T3.6.4 Water Temperature, Tww

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Under HEAT or Auto HEAT Modes,Under HEAT or Auto HEAT Modes,

• Compressor will NOT run and alarm will be activatedCompressor will NOT run and alarm will be activated

- IF T- IF Tww 10°C or T 10°C or Tww 35°C for at least 20 seconds 35°C for at least 20 seconds

• Compressor will shut down and alarm will be activatedCompressor will shut down and alarm will be activated

- IF compressor has been running for 20 seconds and - IF compressor has been running for 20 seconds and

TTww < 6°C for 20 seconds < 6°C for 20 seconds

• Compressor will run and alarm will be deactivatedCompressor will run and alarm will be deactivated

- IF 10°C - IF 10°C T Tww 35°C 35°C

3.6.4 Water Temperature, T3.6.4 Water Temperature, Tww

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• Compressor will cut OFF if TCompressor will cut OFF if Tsucsuc < -6°C < -6°C

- Measure refrigerant suction temperature- Measure refrigerant suction temperature

- To prevent the water heat exchanger from freezing up - To prevent the water heat exchanger from freezing up

during heat mode during heat mode

3.6.5 Suction Temperature, T3.6.5 Suction Temperature, Tsucsuc

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3.6 Protection3.6 Protection 3.6.6 Self Diagnostics3.6.6 Self Diagnostics

• APM01CB APM01CB Error Code Description

E0 Controller system's errorE1 Water level switch errorE2 Compressor low pressure protectionE3 Compressor high pressure protectionE4 Return air sensor missingE5 Indoor coil sensor missingE6 Water outlet sensor missingE8 Gas leakE9 Coil temperature exceed 68°CEA Pump fault or water level faultEb Temperature of water entering too high or lowEc Networking communication error

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3.6 Protection3.6 Protection 3.6.6 Self Diagnostics3.6.6 Self Diagnostics

• APM02D APM02D

Error Code Description Error Code DescriptionE0 Indoor coil 1 sensor missing or damaged F1 Compressor 2 low pressure failure input contactE1 Indoor coil 2 sensor missing or damaged F2 Compressor 2 high pressure failure input contactE2 Return air sensor missing or damages F3 Water level failure input contactE3 Water outlet 1 sensor mising or damaged F4 Compressor 2 overload failure input contactE4 Water outlet 2 sensor missing or damaged F5 Compressor 1 overload failure input contactE6 Suction 1 sensor missing or damaged F6 Fan overload failure input contactE7 Suction 2 sensor missing or damaged F7 Water pump overload failure input contactEb Compressor 1 gas leaking F8 Compressor 1 high pressure failure input contactEc Compressor 2 gas leaking F9 Compressor 1 low pressure failure input contactEd Compressor 1 indoor coil frosting FA electrical heater overload failure input contactEE Networking communication port error Fb Entering water temperature 1 failureEf Compressor 2 indoor coil frosting Fd Entering water temperature 2 failureF0 Water flow failure input contact FE Suction temperature too low

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4. Installation 4. Installation 4.1 Hanging the Unit4.1 Hanging the Unit

4.2 Location of Hanging4.2 Location of Hanging4.3 Ductwork4.3 Ductwork4.4 Water Piping4.4 Water Piping4.5 Drainage4.5 Drainage4.6 Cleaning & Flushing System4.6 Cleaning & Flushing System

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4. Installation

4.1 Hanging the Unit4.1 Hanging the Unit

Hanger threaded rods

Bolted to underside of ceiling slab

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4. Installation


• Recommend to use vibration isolators on Recommend to use vibration isolators on

the brackets to reduce noise and vibration the brackets to reduce noise and vibration

transmissions transmissions

• Spring isolator to be used for better vibration Spring isolator to be used for better vibration

control.control.

spring

bottom washer

PVC tube

Upper washer, welded onto bracket

nut

bracket

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4. Installation


• Spring kit installation Spring kit installation

- Insert the threaded rod through the bracket- Insert the threaded rod through the bracket

- Insert the rod through the piece of soft PVC - Insert the rod through the piece of soft PVC

plastic tube. The tube will go through the plastic tube. The tube will go through the

mounting hole on the bracketmounting hole on the bracket

- Insert the spring over the plastic tube- Insert the spring over the plastic tube

- Screw in the bottom washer and locking nut- Screw in the bottom washer and locking nut

Spring Length Nominal load Deflection Natural frequencyModel (mm) (kg) (mm) (Hz)WH11-20B/BR 43 20 8 4.3 ~ 5WH25/30 B/BR 51 32 11 4.3 ~ 5WH40/50 B/BR 55 40 10 4.3 ~ 5WH60/70 B/BR 60 50 10 4.3 ~ 5

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4. Installation

4.2 Location of hanging4.2 Location of hanging

Install at a location that gives sufficient space clearance for:Install at a location that gives sufficient space clearance for:

• Hanging the unitHanging the unit

• Installing and maintaining the water pipingInstalling and maintaining the water piping

• Installing and maintaining the duct workInstalling and maintaining the duct work

• Accessing the unit’s internal parts via access panelAccessing the unit’s internal parts via access panel

• Removal of air filter for cleaning Removal of air filter for cleaning

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4. Installation

4.2 Location of hanging4.2 Location of hanging

supply air

return air

500 mm

800 mm

800 mm

1200 mm

air filter

access panel

Dia. 23

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4. Installation

4.3 Ductwork4.3 Ductwork

Supply & ReturnSupply & Return

• Use good acoustic lined ductsUse good acoustic lined ducts

• Return air ducts are recommended where noise is criticalReturn air ducts are recommended where noise is critical

• Make sure ducts are connected firmly to prevent air Make sure ducts are connected firmly to prevent air leakageleakage

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4. Installation


In general, there are 2 methods of applying the unit:In general, there are 2 methods of applying the unit:

1. Ducted supply, free return1. Ducted supply, free return

(a)(a)

WH unit

Supply duct

diffusersFree return

within the room

FREE

RETURN

EXPOSED

- The unit is left exposed within the room together with the - The unit is left exposed within the room together with the supply ductwork supply ductwork

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4. Installation



1. Ducted supply, free return1. Ducted supply, free return

(b)(b)

WH unit

supply duct

ceiling boardreturn grille

diffusers

FREE RETURN WITHIN CEILING

- The unit is within the ceiling space acts as a return plenum.- The unit is within the ceiling space acts as a return plenum.

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4. Installation



2. Ducted supply, ducted return2. Ducted supply, ducted return

- Useful when noise attenuation is critical in the room- Useful when noise attenuation is critical in the room

WH unit

supply duct

ceiling board

return grille

diffusers

return duct

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4. Installation

4.4 Water Piping4.4 Water Piping

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4. Installation


Water OutWater In

WH Unit

• Males couplingsMales couplings

• In general, no pipe insulation required In general, no pipe insulation required

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4. Installation


Flexible hoseFlexible hose

• To ease water pipe installationTo ease water pipe installation

• Steel reinforced PVC hose with 2 female BSPP couplings at Steel reinforced PVC hose with 2 female BSPP couplings at the end.the end.

• Use O-rings provided to have a leak-proof jointUse O-rings provided to have a leak-proof joint

Female couplings

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4. Installation

4.4 Water Piping4.4 Water PipingPressure

gauge

Water Inlet

Water Outlet

Gate Valve

Strainer

Automatic Shut-off

Valve

Flexible joint

Thermometer

Balancing Valve

WH Unit

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4. Installation

4.5 Drainage4.5 Drainage

• Slanting drain pan design Slanting drain pan design

Slanting drain pan Drain

• Drain pipe must be inclined at an angle to allow free drainageDrain pipe must be inclined at an angle to allow free drainage

Drain pipe, ¾”

Slope downwards to the nearest drain(recommended 1:100)

U-Trap

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• Water circulating system must be cleaned and flushed of all Water circulating system must be cleaned and flushed of all construction dirt and debrisconstruction dirt and debris

• The system should be filled at the city water makeup connection with all The system should be filled at the city water makeup connection with all air vents open. After filling, vents should be closedair vents open. After filling, vents should be closed

• Supplemental heater and circulator pump should be shut offSupplemental heater and circulator pump should be shut off

• Use 27°C water as flush lingerUse 27°C water as flush linger

• Refill the system with clean waterRefill the system with clean water

4. Installation

4.6 Cleaning and Flushing System4.6 Cleaning and Flushing System

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The end The end

Thank YouThank You

service section technical training december 2005

Documents