[PPT] - How to Sell? Page 2 How to Sell? Uniform Presentation Product PowerPoint Presentation

SLIDE 1

SLIDE 2

Page 2

How to Sell?

SLIDE 3

Page 3

Uniform Presentation
Product Knowledge
Product Features, Troubleshooting
Application Knowledge
Unit selection
Piping S

election

Pump S

izing

Cooling Tower sizing - basic
Cost Comparison Example –
Payback Period and S

aving after Payback Period

Project reference

How to Sell?

SLIDE 4

Page 4

Split Type or Package Type?
Static required?
R410A or R22?
Heatpump or Cooling Only?

Unit Selection

SLIDE 5

Page 5

Direct Return / Reverse-Return

reverse reverse-

return

return direct direct-

return

return

Galvanized pipes are recommended to be used for water pipes. Galvanized pipes are recommended to be used for water pipes.

SLIDE 6

Page 6

Piping Sizing 1.

1. Determine Flow Rate,

Determine Flow Rate, gpm gpm 2.

2. Determine Pipe Size

Determine Pipe Size

SLIDE 7

Page 7

1. Determine system water flow rate
DON’T sum up directly the total nominal water flow
f each WSHP unit.
Total System design flow rate is determined by the

performance of the water cooler, where most of them are evaporative type and is very much dependent on the entering air wet bulb temperature.

Determine System Flow Rate

SLIDE 8

Page 8

2. Determine Diversity Factor
Total Cooling load must be known.
Diversity Effect must be considered. This is to prevent over sizing water

cooler Diversity Factor, D = Block Load / Σ(Peak Load)

Recommended diversity factor;
85% for system up to 40 tons
80% for system between 40 and 60 tons
75% for system greater than 60 tons
System diversity will only affect the range of the water cooler.

SLIDE 9

Page 9

3. Determine WSHP unit flow rate (Cont..)

Range of Water Cooler, Rs = Twi – Two Where; Twi = entering water temperature Two = leaving water temperature

By using diversity factor, D, we can then calculate the average range of

the water source units, Rp Rs = D * Rp

Where typical value of range are between 5°C to 8°C or equally 9°F to

14.4°F.

Twi Two

SLIDE 10

Page 10

4. Determine individual unit peak cooling load
By assuming 30% of heat rejection ratio,

Qh = 1.3 *D* Qc

Total heat rejection, Qh

Qh = mw * Cp * (Twi – T wo)

Where

mw = mass flow rate of water Cp = water specific heat

By replacing with known constants, we will get these familiar equations;

Qh = 500 gpm (Twi – T wo)

Total Cooling Peak Load, Qc

1

SLIDE 11

Page 11

4. Determine individual unit peak cooling load (cont..)
By having water cooler range, Rs in the equation;

Qh = m * C * ∆T

By substituting equa. 1 into equa. 2,

1.3 *D* Qc = 500 * gpm * Rs

By taking Qc * D = qc ( individual unit peak cooling load),
equa. 3 is now;

1.3 * qc = 500 * gpm * Rp Qh = gpm * 500 * Rs 2 3 4

SLIDE 12

Page 12

Quiz 1

A water loop system consists of 30 units of water source heat pump units with a combined total peak loading of 450,000btu/hr. the system is served by a centrifugal water pump. A closed loop water cooler is used to give a leaving water temperature of 30°C. the ambient air wet bulb temperature is 25°C.

Determine the required total system water flow rate.
Calculate the average range of the water source units
If one of the water source units has been designed to give a cooling capacity of 11,000btu/hr,

calculate the water flow rate required.

Recalculate unit range if there is no diversity factor is applied.

From the given table, at 25°C wet bulb temperature, the water flow rate is 2.36 gpm/ton. Therefore, the total system water flow rate is 2.36 gpm/ton * (450000/12000)ton = 88.5 gpm. The system range is first calculated; Rs = 1.3 * D * Qc / gpm / 500 = 1.3 * 0.85 * 450,000 / 88.5 / 500 = 11.24°F or 6.24°F Rp = Rs / D = 13.22°F or 7.35°F Rp = 1.3 * qc / gpm / 500 ⇒ 13.22 = 1.3 * 11000 /gpm/500 ; gpm = 2.16gpm If D = 1, and maintaining the flow rate, Rp = Rs / D = 13.22°F or 7.35°F

SLIDE 13

Page 13

Calculation Template

is provided in Excel Sheet

SLIDE 14

Page 14

pipe flow rate

Determine Pipe Size

Friction loss (ft H2O per 100ft) Velocity (ft/s) Recommended max friction loss

SLIDE 15

Page 15

Example of Piping in a Flow

Ground Floor

PIPE DIAMETER

VELOCITY FRICTION LOSS

SECTION USGPM m3/s IN FPS FT/100FT M FT Total FT ELBOW-90 ELBOW-45 TEE- BRANCH TEE-THRU GATE/ AUTO GLOBE CHECK STRNR REDUCER ENLARGER QTY 2 2 FT 4 2.6 QTY 2 1 1 FT 2.3 0.74 0.36 QTY 2 FT 2.3 QTY 2 FT 2.3 QTY 2 2 1 1 FT 2 1.4 1.2 1.1 QTY 4 FT 1.4 QTY 1 1 FT 1 1.5 QTY 2 1 1 FT 2 0.9 4 QTY 1 1 1 1 FT 1 5 0.6 0.44 QTY 2 1 1 1 1 FT 2 0.9 4 0.8 1.11 QTY 1 1 1 1 FT 1 5 0.6 0.44 QTY 1 1 FT 0.9 4 FLOWRATE STRAIGHT PIPE FITTING EQUIVALENT LOSS TOTAL EQU LENGTH FT. TOTAL FRICTION LOSS FT. 0.0022 0.75

A-C

28.88 0.0182 1.5 4.5 5.5 5.72 18.78 37.56 50.76 2.79

C-D

25.38 0.0160 1.25 5.2 9 3.55 28.80 1.10 2.2 3.5 4.39 14.4 11.64 23.28 28.98 2.61

D-E

14.18 0.0089 1.25 3.2 3.2 2.31 7.59 15.18 19.78 0.63

E-F

10.68 0.0067 1.25 2.2 1.7 1.30 4.26 8.52 13.12 0.22

F-H

3.50 0.0022 0.75 2.2 3.5 5.52 18.12 36.24 45.34 1.59

H-I

3.50 0.0022 0.75 2.2 3.5 1.50 4.92 9.84 15.44 0.54

C-I

31.30

Service Parts Claims Room

3.50 0.0022 0.75 2.2 3.5 0.30 3.50 1 2.00 10.90 0.38

Reception/ Service Counter

11.20 0.0071 1 3.8 7 0.91 3 6.00 13.04 0.91

Discussion Room

3.50 0.0022 0.75 2.2 3.5 3.80 12.48 24.96 35.77 1.25

Staft Area

7.20 0.0045 1 2.6 3.5 0.91 3 6.00 13.04 0.46

Manager Room

3.50 0.0022 0.75 2.2 3.5 1.50 4.92 9.84 14.74 0.52

SLIDE 16

Page 16

Pump Sizing

1. Pump Sizing ~ Max Pump Head (Pressure Loss) need in a system.

The Max Pressure Losses normally happen at;

Longest route from Pump to last unit
Route with most elbows, valve fittings and probably with high pressure drop units.
2. With pre-determined pipe size, calculate the total pressure drop. (return loop must be

considered)

SLIDE 17

Page 17

Example of Pump Sizing

VELOCITY FRICTION LOSS

SECTION USGPM m

3/s

IN FPS FT/100FT M FT Total FT ELBOW-90 ELBOW-45 TEE- BRANCH TEE-THRU GATE/ AUTO GLOBE CHECK STRNR REDUCER ENLARGE

QTY

1 1

FT

3.2 40

QTY

1 1

FT

7.5 3.2

QTY

1 1

FT

7.5 3.2

QTY

2 2 1 1

FT

7.5 7.2 1.424 0.72

QTY

2

FT

5.6

QTY

2

FT

5.6

QTY

2 1 1

FT

6 1.8 2.64

QTY

2 2 1 1

FT

4 2.6 0.74 0.36

QTY

2

FT

2.3 14.47 22.20 5.50 42.16 12.85 FLOWRATE PIPE DIAMETER STRAIGHT PIPE FITTING EQUIVALENT LOSS TOTAL EQU LENGTH FT. TOTAL FRICTION LOSS FT. WC-P 144.04 0.0909 3 6 4 1.52 5 5 48.2 1.928 P-a 144.04 0.0909 3 6 4 3.05 10 10 20.7 0.828 a-WC 144.04 0.0909 3 6 4 6.10 20 20 30.7 1.228

a-b

144.04 0.0909 3 6 4 3.66 12 24 55.544 2.22176

b-c

94.13 0.0594 2.5 2.8 7 3.66 12 24 35.2 2.464

c-d

46.78 0.0295 2.5 2 0.75 3.66 12 24 35.2 0.264

d-A

28.88 0.0182 2.5 1.5 0.42 3.66 12 24 40.44 0.169848

A-C

28.88 0.0182 1.5 4.5 5.5 5.72 18.78 37.56 51.86 2.8523

C-D

25.38 0.0160 1.25 5.2 9 3.55 11.64 23.28 27.88 2.5092

Total, m H2O Sub-Total CK50+WSS safety factor 15% Total, FT H2O

SLIDE 18

Page 18

Cooling Tower Sizing - basic

1. To size a cooling tower, outdoor ambient wet bulb, EWT and LWT DB should be pre- determined. 2. Total system flow rate is then calculated. 3. Refer to Cooling Tower Manufacturer Selection Table and select the suitable size.

Tips: with std condition of Cooling Tower, ambient WB at 27°C, entering water at 37°C DB, leaving water at 32°C DB, just take the Total GPM / 3.43 = Tonnage of Cooling Tower. Reminder: with increase of delta T, and EWT, the factor might vary till 2.2

SLIDE 19

Page 19

Payback Period Analysis (example)

SLIDE 20

Page 20

Step by Step Example to be provided during the training

SLIDE 21

Page 43

Cost Comparison Worksheet (Pay Back Period and Saving after Pay Back Period)

Compared System Water Cooled Remark Equipment Air Cond Units 58,641 Calculate the Basic A/C units cost Piping & Valves 54,633 WaterPump 5,650 Depend whether Air Cooled or Water Cooled Cooling Tower 5,200 Depend whether Air Cooled or Water Cooled 124,124 Maintenance Air Cond Service Cooling Tower Service 400 Depend whether Air Cooled or Water Cooled Installation Labour Cost Cooling Tower 1,000 Depend whether Air Cooled or Water Cooled Operating Electricity 40,090 Use following simulation table. For this analyis. RM0.38/kWhr is being used. Initial Cost 125,124 Annual Cost 40,490 Payback Period (Year) vs Chiller

3.09

Cost Saving 1 Year

40,490

After Payback Period, RM 3 Years

121,470

5 Years

202,450

10 Years

404,900

New Tarriff (RM0.38/kWhr) Electricity Operating Cost: Simulation Guide Compared System Water Source Total A/C Ton Refrigerant 45 45 ~ Capacity, btu/hr 540,000 540,000 ~ Capacity, W 158,265 158,265 Average EER 2.5 3 ~ Power Consumption, W 63,306 52,755 Working Weeks per Year 50 50 Working Days per Week 5 5 Working Hours per Day 8 8 Annual Operating Cost 48,113 40,094

SLIDE 22

Water Source Heat pump

-- Product Knowledge

SLIDE 23

Page 45

Content Introduction to Water Source System General Benefit of Water Source

System

Product Lineup Product

Features
Control
Installation

SLIDE 24

Page 46

System Introduction

What is Water Source A/C?

Water inlet Water

utlet

Compressor Water-to- refrigerant heat exchanger Expansion device

Remark: MWH-C is using capilary tube

SLIDE 25

Page 47

System Introduction

MWH-C Inside Structure (packaged type)

Fan Air side exchanger Compressor Water side exchanger Control box Four-way valve

SLIDE 26

Page 48

System Introduction

1. Water Loop System
2. Ground Water System
3. Surface Water System
4. Ground Coupled System

SLIDE 27

Page 49

System Introduction

1.Water Loop (summer operation)

)

Cooling tower ON Pumps Plate-and-frame heat exchanger Heat pumps Boiler OFF Expansion tank Air separator 32ºC [90ºF] Heat pumps in cooling mode

SLIDE 28

Page 50

System Introduction

1.Water Loop (winter operation)

)

Cooling tower OFF Boiler ON 16ºC [60ºF] Heat pumps in heating mode

SLIDE 29

Page 51

System Introduction

1.Water Loop (Spring and Fall Operation)

Boiler OFF

Heat pumps in heating mode Heat pumps in cooling mode Cooling tower OFF

SLIDE 30

Page 52

System Introduction

2.Ground Water

Water from well
Drained back to well, drain, stream or lake
Stable throughout the year
Limited by availability of water table and aquifers

in the ground

SLIDE 31

Page 53

System Introduction

3.Surface Water

Open or close loop
Open – water being returned back to source or drain
Closed – water being re-circulated in the closed loop
Stable throughout the year

SLIDE 32

Page 54

System Introduction

4.Ground Coupled

HE is buried into the earth
Installation cost is high
Massive & stable thermal capacity

SLIDE 33

Page 55

Benefits of a Water Source System

Heat recovery offers energy savings Individual space control Performs both cooling and heating Small amount of floor space required Unit failure does not affect the rest of the

system

Higher Energy Efficiency Rating if

compared to Air Cooled System

SLIDE 34

Page 56

Advantages of Water Source System

SLIDE 35

Page 57

Benefits of a Water Source System

Supply Cooling and Heating simultaneously

25℃ 30℃ 25℃ 20℃ Cooling Mode Heating Mode Cool Heat

SLIDE 36

Page 58

Benefits of a Water Source System

Individual space control Small amount of floor space required

SLIDE 37

Page 59

Benefits of a Water Source System

Higher Energy Efficiency Rating if

compared to Air Cooled System

0.5 1 1.5 2 2.5 3 3.5 4 Air Cooled Electric Heater Water Cooled EER Comparison

The illustrated EER does not represent actual EER of MWH-C series. For more accurate EER, please refer to technical manual.

SLIDE 38

Page 60

Benefits of a Water Source System

Independent Metering

SLIDE 39

Page 61

Benefits of a Water Source System

Installation Flexibility

No special AHU room is required. Can be ceiling concealed, space saving Additional unit can be installed for office extension purpose.

SLIDE 40

Page 62

MWH-C Introduction

SLIDE 41

Page 63

Manufacturing Process

1 1

Coil, second panel & coil assembly Coil, second panel & coil assembly

2 2

Compressor and tube in tube assembly Compressor and tube in tube assembly

3 3

Automatic vacuum Automatic vacuum

4 4

Auto Auto-

Charging Machine

Charging Machine

SLIDE 42

Page 64

5 5

Auto Auto-

charging process (according to model)

charging process (according to model)

6 6

Fan motor assembly Fan motor assembly

7 7

Refrigerant Leak Test station Refrigerant Leak Test station

8 8

Leak test equipment (Halogen leak test) Leak test equipment (Halogen leak test)

Manufacturing Process

SLIDE 43

Page 65

9 9

Leak test station Work Instruction Leak test station Work Instruction

10 10

Leak test station Work Instruction Leak test station Work Instruction

11 11

Functional Test Functional Test

12 12

Supply Air Temperature Supply Air Temperature

Manufacturing Process

SLIDE 44

Page 66

13 13

Room Temperature Room Temperature

14 14

Power Supply Power Supply

15 15

Condensing Pressure Condensing Pressure

16 16

Handset Operation Handset Operation

Manufacturing Process

SLIDE 45

Page 67

17 17

Air purging (to clean the water left in Air purging (to clean the water left in system) system)

18 18

Quality Check Data Card (kept by factory for Quality Check Data Card (kept by factory for 5 years) 5 years)

19 19

Packing Packing

20 20

Quality Control Certification Quality Control Certification

Manufacturing Process

SLIDE 46

Page 68

HORIZONTAL WATER COOLED PACKAGE

Package Type

Horizontal unit, MWH-

C series

SLIDE 47

Page 69

Nomenclature

S td pipe connection = right. Left piping spec is not available now.

MWH008CR02R-ABAE 02 = 15Pa 03 = 30Pa 05 = 50Pa 08 = 80Pa

SLIDE 48

Page 70

Product Lineup

13 Models, capacity: 2.5~20 kW Low height, suitable to be ceiling concealed

Model Capacity Dimension (L*W*H) Outline

MWH008C/ CR 2.5 875*520*373 MWH010C/ CR 3.0 875*520*373 MWH013C/ CR 3.7 875*520*373 MWH015C/ CR 4.4 875*520*373 MWH020C/ CR 5.8 1236*651*436 MWH025C/ CR 6.8 1236*651*436 MWH028C/ CR 8.1 1242*744*365 MWH030C/ CR 8.9 1242*744*365 MWH040C/ CR 12.4 1300*794*434 MWH050C/ CR 12.6 1300*790*500 MWH060C/ CR 14.9 1300*790*500 MWH065C/ CR 17.7 1300*790*500 MWH070C/ CR 20.0 1300*790*500

SLIDE 49

Page 71

S ervice panel S ervice Panel Controller box Return air S upply Air S ervice panel Leaving Water S ensor OD Coil S ensor Return air sensor Compressor Blower

Basic Construction

SLIDE 50

Page 72

前出风侧出风

Components detail

Type Model Qty Blower Type Fan Motor 008C 2P14S225ANC 1 SYZ7-5II YDK20-6AD3(1.2uF) 010C 2P17S225ANA 1 SYZ7-5II YDK40-4I3(2.5uF) 013C 2P20C225BNG 1 SYZ7-5II YDK40-4I3(3.5uF) 015C 2K23S225AHA 1 SYZ7-5II YDK40-4I3(5uF) 020C TH310VEEC 1 SYZ7-7I YDK90-4A6(6uF) 025C TH365VEEC 1 SYZ7-7I YDK145-4A6(6uF) 028C 2P20C225BNG 2K23S225AHA 1+1 SYP200-190J-3 YDK220-4A8(7.5uF) 030C 2K23S225AHA 2 SYP200-190J-3 YDK220-4A8(7.5uF) 040C TH310VEEC 2 SYZ10-10II YDK180-6B8(7.5uF) 050C JT125BCBY1L 1 SYZ10-10II YDK600-4F8(25uF) 060C JT160BCBY1L 1 SYZ10-10II YDK600-4F8(25uF) 065C ZR72KC-TFD-522 1 SYZ10-10II YDK600-4F8(20uF) 070C ZR81KC-TFD-522 1 SYZ10-10II YDK600-4F8(25uF) Model C

m

p r e s s

r

Blower Type Rotary Scroll

SLIDE 51

Page 73

Product Features

SLIDE 52

Page 74

front MWH008~070C(R)

前出风侧出风

Site convertible Air Discharge Direction

side

Convertible Air Throw

SLIDE 53

Page 75

Compressor Upper panel Lower panel

Double Isolation Panel

Reduce noise and vibration transmission

SLIDE 54

Page 76

Wide Operating Range

Allowable Entering Water Temperature (°C)

Cooling model Heating model

30 20 20

To refer to TM. Include air limit too.

Indoor DB (°C) 16 27 35 16 30

SLIDE 55

Page 77

Part Loading Capability

Only available for model MWH028/ 030/ 040C/ CR 2 stage loading capacity at 50%

~ 100%

Less noise during low load condition

2 Step Capacity, Two compressors

Comp. Loading %

100 50

SLIDE 56

Page 78

Auto Random Restart

S

et at handset dip switch.

To have Auto Random Restart, Dip Switch 2 set to ON

SLIDE 57

Page 79

Controller

SLIDE 58

Page 80

Wireless controller, Wireless controller,

ptional
ptional

Std handset, MC301 Std handset, MC301 Main Main Board Board MC120 MC120 Extension board Extension board Connection cable

（std = 10m）

※remark:

Ext board for 2 compressors system

nly.

Hanset

SLIDE 59

Page 81

MC120 mainboard

Connection

LS :

接水位开关

TH1: Return air sensor COM8: To ext board TH2: Leaving water Temperature sensor TH3: Coil temperature sensor COM5: To connect to MC303, centralized controller COM7: To MC301 S W2: Dip switch S W1: Dip switch L,COMP: Comp Out COM: Common output for E1, E2, E3 E1: Flow switch E2: LP E3: HP L,N: Power line HF: High fan MF: Medium fan LF: Low fan HEAT/ AS : n/ a WP: n/ a 4WV: OF: Water valve COM9: To ext board JP: network j umper

220V 220V 5V 5V/12V 5V/12V 12V 5V 5V 5V 5V

SLIDE 60

Page 82

COM: Common output for E1, E2, E3

E1: n/ a E2: LP2 E3: LP3 TH2: 2nd system LWT sensor TH1: Coil 2 temp sensor COM8: To mainboard COM9: To mainboard OUT1: To 4WV L,COMP: power line & To compressor

MC120 ext .board

Connection

220V 220V 5V/12V 5V/12V 5V 5V

SLIDE 61

Page 83

MC301

Control panel

Wire controller Remote controller (optional)

SLIDE 62

Page 84

MC120 Function

MODE: Cooling only: COOL/AUTO /FAN;
Heat pump: COOL/HEAT/AUTO/FAN
Temperature setting range: 16-30°C (61-86 °F)
TIMER setting
SLEEP function (COOL/HEAT/AUTO)
LCD for displaying the temperature setting, mode setting,

real time & ON/OFF

Auto-restart after power failure (default: OFF)
Compressor restart, overload protection
Water temperature detection
Gas Leak protection
Indoor coil antifreeze protection (COOL/DRY)
Self diagnosis
Networking compatible with MC303.

SLIDE 63

Page 85

Protection Logic

SLIDE 64

Page 86

Protection

1. Compressor ON/OFF Protection

In any case of power failure, compressor will take 1 minutes after power is resumed to restart.

2. Minimum 4 minutes compressor run time
3. Minimum 3 minutes compressor shut down time
4. Internal Compressor Overload Protection
5. During heating mode, indoor coil over heat

protection

SLIDE 65

Page 87

6. During cooling mode and compressor run for at least

10 minutes, if indoor coil temperature is =<0°C for 1 minute, indoor fan will run at High speed and compressor will cut out, After 5 minutes, if indoor coil temperature >5°C, indoor fan will follow user set speed. if indoor coil is within 0-5°C, indoor fan will remain at High speed. Compressor will cut in, if;

Compressor has been cut out for 3 minutes and indoor

coil temperature =>12°C for 1 minute.

Protection

SLIDE 66

Page 88

7. Gas Leak Detection

During cooling mode, after compressor run for 5 minutes, if Tid>= Tr-3°C, alarm will be activated. If alarm continue for 5 minutes, compressor and indoor fan will cut out. (for 2 compressor system, 1 system indoor fan will

continue to run). If condition turns better within 5 minutes,

alarm will be deactivated. Else, system will need to restart manually to clear the alarm.

Protection

SLIDE 67

Page 89

7. Gas Leak Detection (continue)

During heating mode, after compressor run for 5 minutes, if Tid>= Tr+3°C, alarm will be activated. If alarm continue for 5 minutes, compressor and indoor fan will cut out. (for 2 compressor system, 1 system indoor fan will

continue to run). If condition turns better within 5 minutes,

alarm will be deactivated. Else, system will need to restart manually to clear the alarm.

Protection

SLIDE 68

Page 90

Basic Operation

SLIDE 69

Page 91

MWH-C control

Operation

Set “auto-restart after power failure” the unit

will recover to the status before power failure

Temperature setting: use “Δ” or “▽” keyboard

to increase or decrease by 1 °C or 1 °F, temperature range is 16-30 °C (61-86 °F )

SLIDE 70

Page 92

MWH-C control

Operation

Week timer setting: Include total 28 on/off

timers, 7 days every week and 4 timers every day.

Single timer setting: It is active only on the same

day that timer set when power on. It is inactive when timer is set at AM 00:00. It can be set at AM 00:00 if you want to cancel some timer setting.

Press “FAN” and “MODE” at one time, all timers

setting can be canceled.

SLIDE 71

Page 93

MWH-C Control

Operation

Press “MODE” key, the current mode is
twinkling. The mode is changed when “MODE” is
pressed. The mode changes as follows:
Heat pump:COOL→HEAT→FAN→DRY→COOL

Cooling only: COOL→FAN→DRY→COOL

SLIDE 72

Page 94

MWH-C control

Error code and Troubleshooting

Error code Causes

E1 Compressor2 low pressure faulty E2 Compressor2 high pressure faulty E3 Compressor2 overload E4 System 2 coil temperature sensor open or short E5 Leaving water temperature 2 faulty F2 System 1 coil temperature sensor open or short F4 Return air temperature sensor open or short F6 Communication faulty F9 Compressor1 refrigerant let out FE Compressor2 refrigerant let out H1 Compressor1 overload H4 Compressor1 high pressure faulty L1 Compressor1 low pressure faulty L3 Temperature of water entering too high or low L4 Water flow switch faulty L5 Leaving water temperature 1 faulty

SLIDE 73

Page 95

Centralize Controller

SLIDE 74

Page 96

MWH-C control

MC303 panel outlook.

Enter : confirm setting
Timer:
Setup:
Fan:
Swing: not applicable
Heater: not applicable
Mode:
Unit no:
Sleep:

SLIDE 75

Page 97

Centralized-control (option)

Use MC303 controller

MWH MWH MC303

32 units

MWH MWH MWH MWH MC301 MC301 MC301 MC301 MC301 MC301

SLIDE 76

Page 98

MC303 Features

The central controller is only applicable to Digital

Variable Multi system and the air condition system of the MC120 main board used.

Group units operation setting: temperature, mode,

fan speed, sleep for 32 units at the same time.

Group units ON / OFF: turn on or off all units Group Timer ON/ OFF. Timer setting for MC301 and

MC303 is set. S ystem to follow the last setting.

Auto display one by one status when in standby mode.

SLIDE 77

Page 99

S

ingle unit operation setting: on/ off, temperature, mode, fan speed, sleep.

Timer setting: timer on/ off all units. Display Circularly : display each unit temperature,

mode, fan speed, running mode and fault code one by one.

Real time clock: After the system power failure,

the spare battery keep the time continues to run.

MC303 Features

SLIDE 78

Page 100

Wiring Connection

Networking cable: shielded twisted RS

485

N# INDOOR UNIT(n<=32) 1# INDOOR UNIT 2# INDOOR UNIT

MC303 AC:220V~50Hz

MC120 MC120 MC120

ADAPTOR POWER

A

B COM15

A

B

A

B COM15 COM15

NOTE: For the final unit, please close jumper JP

n main board. Std setting is closed.

Come with MC303

SLIDE 79

Page 101

Unit Address Setting

Unit No

SLIDE 80

Page 102

Controller Setting

Press “ setup” for 5s, LCD will detect the available indoor

add.

Check by press “ Mode” for 5s, all detected unit add will

be displayed, press up and down key to check one by one if there is any error.

S

elect particular unit, Press “ unit no” , and press up and down to select the desired unit add.

Default value: 24degC, Auto mode, high fan speed, no

sleep, no swing and no heater.

Lock function: press sleep for 5s, upper right of LCD show

“ lock” . Press again sleep for 5s, unlock the unit.

SLIDE 81

Page 103

Control Setting

Group control: press unit no, select” --” , LCD unit no will

flash, group control is activated. ]

Group ON/ OFF: press ON/ OFF button for 5s, unit no will

flash, show “ [ ]” . Can on or off all units.

Disable Group control: press sleep for 5s if the unit add is

“ --”

°C and °F: Handset dipswitch ON = °C, default = off = °C.

However, if press “ fan” for 5s, can switch over.

Timer = 4 ON/ OFF timer / days. Cancel timer, press

“ timer” for 5s.

SLIDE 82

Page 104

Maintenance

SLIDE 83

Page 105

Maintenance

Normal maintenance on all conditioners is generally

limited to filter changes. Lubrication of the fan motor is not required.

Filter changes are required at regular intervals. The time

period between changes will depend upon the proj ect

requirements. S
me applications such as motels produce

a lot of lint from carpeting and linen changes. It is suggested that the filter be checked at 60-day intervals for the first year until experience is acquired. If light cannot be seen through the filter when held up to sunlight or a bright light, it should be changed. A more critical standard may be desirable.

The condensate drain pan should be checked annually

and cleaned and flushed as required.

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Maintenance (cont… )

Records of performance measurements of volts,

amps, and water temperature differences (both heating and cooling) are recommended. A comparison of logged data with start-up and other annual data is useful as an indicator of general equipment condition.

Periodic lockouts always are caused by air or water
problems. The lockout (shutdown) of the

conditioner is a normal protective result. Check for dirt in the water system, water flow rates, water temperatures, airflow rates (may be dirty filter), and air temperatures. If the lockout occurs in the morning following a return from night setback, entering air below machine limits may be the cause

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Trouble Shooting

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Troubleshooting-1

1. Neither fan nor compressor runs

The fuse may be blown or the circuit Breaker is
pen. Check electrical circuits and motor windings

for shorts or grounds. Investigate for possible

verloading. Replace fuse or reset circuit Breakers

after fault is corrected.

Wires may be loose or broken. Tighten or replace.
S

upply voltage may be too low. Check it with the power company.

Control system may be faulty. Check thermostat for

correct wiring and check 24 volt transformer for burnout.

(No power supply)

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Troubleshooting-2

2. Fan runs but compressor does not run

Check compressor capacitor.
Wires may be loose or broken. Tighten or replace.
The high pressure switch may have tripped due to:

a) Fouled or plugged condenser; b) Lack of or no condenser water; c) Too warm condenser water; d) Not enough airflow over the coil due to dirty filters;

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Troubleshooting-2 (cont… )

2. Fan runs but compressor does not run

Check thermostat setting, calibration and wiring.
The compressor overload protection is open. If the

compressor dome is extremely hot, the overload will not reset until cooled down. If the overload is external, replace it. If the overload is internal, replace the compressor.

The compressor winding may be open. Check

continuity with ohmmeter. If the winding is open, replace the compressor.

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Troubleshooting-3

3. Compressor attempts to start but is not successful

Check continuity for contactor
High pressure trip check
High superheat results in high discharge temperature
Lack of refrigerant

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Troubleshooting-4

4. Compressor stops after short run

Check thermostat setting.
Check system pressure
refer to troubleshooting-3 possible causes.

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Troubleshooting-5

5. Insufficient cooling or heating

Check thermostat setting.
Airflow may be insufficient. Check and clean the

filter.

The reversing valve may defects, creating a bypass of
refrigerant. If the unit will heat, check the reversing

valve coil.

Check capillary tubes for possible chock of refrigerant

flow.

Check if any block in water flow or if the water is dirty
Lack of refrigerant

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Troubleshooting-6

6. Insufficient water flow through condenser (tube in tube)

Check whether valves are opened.
Check for air is trapped in piping
Check circulating pumps.
Check if correct water pump sizing

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Troubleshooting-7

7. Water dripping

Check condensate drain.
Check for dirty filter.
Check to see if condensate drain runs uphill.
S

ee if blower motor is up to speed.

Check for blower position.
Are drain pipe properly trapped?

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Troubleshooting-8

8. Noisy unit operation

Check for fan wheel whether it is hitting the

housing.

Check if any dented fan wheel.
Check if there is loose fan wheel on shaft.
Check if any tubing is touching the compressor.

Readj ust tubing by bending slightly.

Check all screws on panels.
Check water flow rate.

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Installation Guidelines

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MWH-C Installation

Pipe installation – U trap required
The condensate disposal piping must have a trap and

the piping must be pitched away from the unit not less than 1/ 4" inch per foot (20mm per meter).A piece of single hose from the trap to the drain line is used for simple removal.

J L O ptional Cleanout (21m m Per M eter) 1/4" Per Foot H

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MWH-C Installation

Flexible hose - recommended

Since hose may change in length from +2%

to – 4%

Absorb unit vibration

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MWH-C Installation

Spring Isolator - required

It is recommended the unit be mounted with

spring mounting kit supplied as an optional item.

S pring isolator kit is offered as an optional from factory

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MWH-C Installation

Tilt Angle

Factory recommends to tilt the unit up by 1 degC (as

shown below) in order to have better drain water flow.

Caution: By tilting the unit, duct connection alignment

might be affected, thus, use of flexible duct is highly recommended.

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Duct and attenuation

discharge ductwork is normally used with these

conditioners. Return air ductwork may also be

required, but will require field installation of a 1" or 2" return air duct collar/ filter rack kit

return air duct should be internally lined with acoustic

insulation for sound attenuation

Don't use sheet metal screws directly into the unit

cabinet for connection of supply or return air ductwork, especially on return air ductwork which can damage the drain pan or the coil & tube.

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Piping Work

All units are recommended to be connected to supply

and return piping in a two-pipe reverse return

configuration. A reverse return system is inherently

self-balancing and requires only trim balancing where multiple quantities of units with different flow and pressure drop characteristics are connected to the same loop

A simple way to check for proper water balance is to

take a differential temperature reading across the water connections. To insure proper water flow, the differential should be 5℃ to 6℃.

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Piping Work

A direct return system may also be made to word

acceptably, but proper water flow balancing is more difficult to achieve and maintain

The piping can be steel, copper or PVC.
No unit should be connected to the supply and

return piping until the water system has been cleaned and flushed completely. After the cleaning and flushing has taken place, the initial connection should have all valves wide open in preparation for water system flushing.

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Flushing and Cleaning

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System Cleaning & Flushing

Prior to first operation of any conditioner,

the water circulating system must be cleaned and flushed of all construction dirt and debris. A The piping can be steel, copper

r PVC.
If the conditioners are equipped with water

shut off valves, either electric or pressure

perated, the supply and return runouts

must be connected together at each conditioner location. This will prevent the introduction of dirt into the unit. Additionally, pressure operated valves only

pen when the compressor is operation.

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System Cleaning & Flushing-2

The system should be filled at the city water

makeup connection with all air vents open. After filling, vents should be closed.

Vents should be checked in sequence to bleed
ff any trapped air to assure circulation

through all components of the system.

Power to the heat rej ector unit should be off.
While circulating water, the contractor should

check and repair any leaks in the piping

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System Cleaning & Flushing-3

at the lowest point(s) in the system should

be opened for initial flush and blow-down, making sure city water fill are set to make up water at the same rate

Check the pressure gauge at pump suction

and manually adj ust the makeup to hold the same positive steady pressure both before and after opening the drain valves.

Flush should continue for at least two hours,
r longer if required, to see clear, clean

drain water.

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System Cleaning & Flushing-4

S

hort circuited supply and return runouts should now be connected to the conditioner supply and return connections.

Teflon tape is recommended over pipe dope

for pipe thread connections. Do not use sealers at the swivel flare connections of hoses

The current recommendation is to simply

flush linger with warm 80.6°F (27℃) water.

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System Cleaning & Flushing-5

Refill the system with clean water
S

et the system control and alarm panel heat add setpoint

S

upply power to all motors and start the circulating pumps.

each of the conditioners are now ready for

check test and start-up and for air and water balancing.

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Start Up Procedures

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Start Up

1. Open all valves to full open position and turn on power to the conditioners. 2. S et thermostat for "Fan Only" operation, check for proper air delivery and fan speed. Each unit has 3 speed. 3. S et thermostat to "Cool". Many conditioners have time delays which protect the compressor against short cycling. After a few minutes of operation, check the discharge grilles for cool air delivery. 4. Measure the temperature difference between entering and leaving water. It should be approximately 5°C to 6°C. 5. If the temperature different is out of range, adj ust the combination shutoff/ balancing valve in the return line to a water flow rate which will result 5℃ to 6℃ difference.

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Start Up-2

6. S et thermostat to "Heat "(used in the heat pump model). S et system switch to the "Auto " position and depress the heat setting to the warmest

selection. S
me conditioners have built-in time

delays which prevent the compressor from immediately starting. the fan will start once coil temperature reach 40°C. 7. Measure the temperature difference between entering and leaving water. It should be approximately 4°C to 5°C (based on cooling mode water flow rate). 8. Check the elevation and cleanliness

f

the condensate line. If the air is too dry for sufficient dehumidification, slowly pour enough water into the condensate pan to ensure proper drainage.

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Start Up-3

6. If the conditioner does not operate, please refer to the troubleshooting guideline for necessary corrective action. 7. Check the unit for vibrating refrigerant piping, fan wheels, etc. 8. Do not lubricate the fan motor as it is prelubricated at the factory.

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Project

Application

Office/ Hotel Apartment Business Trade Centre Hospital

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Project

Most recent project Most recent project

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