1. Service Section Technical Training December 2005

2. Loop Water Controller (LWC)

3. Water Source Solution WSHP, WH-B/BR Series Loop Water Controller

4. cooling tower pumps Water source heat pumps looping water Expansion tank boiler

5. Loop Water Controller

6. LWC Control Box

7. Loop Water Controller LWC Wiring Diagram

8. 1. Features 2. System Specification 3. Operation Content

9. 1. Features - Loop Circulating Pump Control - Heat Rejection & Addition Output Stages - Sensor - Alarm / Indication - Water Flow Switch Input - High / Low Water Temp Protection - Pre-cool / Pre-heat Protection - Outdoor (OD) Air Reset - Password Protection

10. 1. Features - Loop Circulating Pump Control > Allows 2 loop circulating pumps with manual or auto lead lag control where operation is interchangeable - Heat Rejection & Addition Output Stages > Total 12 sets of data output can be pre-set as heat addition or heat rejection stages - Sensor: (i) Outdoor (OD) Air Sensor (ii) Water Sensor > 2 types of sensors used to sense the OD air temperature and water temperature

11. 1. Features - Alarm / Indication > Output signal if error occurs in the system > Buzzer in the LCD panel activated when error occurs - Water Flow Switch Input > To detect the availability of water supply to the system - High and Low Water Temperature Protection > Measured by water sensor > When water temperature reached too high / low temperature, send signal and shut off the system

12. 1. Features - Pre-cool & Pre-heat Protection > To provide protection when the temperature exceeding the too high / low temperature (when system is OFF) - Outdoor (OD) Air Reset > The heat addition ON / OFF limit setting of the system is able to be increased in respond to a drop in the OD air temperature - Password Protection > Password entry needed for authority to change / check the setting and configuration of the system

13. 2. System Specification 2.1 System On/Off 2.2 Pump Control Function 2.3 12 Stages of Heat Rejection & Heat Addition Control 2.4 Pre-cool & Pre-heat Protection 2.5 Outdoor (OD) Air Reset 2.6 Emergency Protection 2.7 Error Description

14. 2. System Specification 2.1 System On/Off 2 ways to turn on/off the system via remote ON/OFF switch (S1): (a) Standard Switch (b) Smart Manager If the remote ON/OFF switch (S1) is closed – System ON If the remote ON/OFF switch (S1) is opened – System OFF

15. 2. System Specification 2.2 Pump Control Function 2 Mode Available: i) Automatic Mode ii) Manual Mode

16. 2. System Specification 2.2 Pump Control Function 10s after System On Sound Alarm Lead Pump Off Lag Pump On Error System Off Sound Alarm Check water flow for 15s Normal Check water flow for 15s Error Normal i) Automatic Mode: i) Automatic Mode:

17. 2. System Specification 2.2 Pump Control Function ii) Manual Mode: ii) Manual Mode: Only 1 pump is operates Either 1 pump can be set to operate as the system is on. The checking on the water flow switch is the same as the lead pump in automatic mode

18. 2. System Specification 2.3 12 Stages of Heat Rejection & Heat Addition Control Addition Control 12 Output contacts (198-242 VAC) to switch ON/OFF the boiler and cooling tower. Each contact must be pre-set from the LCD keypad to select it either as a heat addition or heat rejection contact Heat rejection and heat addition temperature setting shall be distributed in sequence and continuous as pre-set from the LCD keypad

19. 2.3 12 Stages of Heat Rejection & Heat Addition Control Addition Control 2. System Specification Example:

20. 2. System Specification 2.3 12 Stages of Heat Rejection & Heat Addition Control Addition Control Condition of the above example setting: (i) 4 heat addition output stages and 8 heat rejection output stages (ii) Temperature hysterisys of 3°C (adjustable) (iii) Heat addition stage temperature: 18°C Heat rejection stage temperature: 30°C

21. 2. System Specification 2.3 12 Stages of Heat Rejection & Heat Addition Control Addition Control Example 1: ON Temperature set-pointSelection OUT117°CHeat add stage 2 OUT218°CHeat add stage 1 The first boiler will cut in when the T w drops below 18°C The second boiler will cut in when the T w is further reduce to 17°C Note: T w = water temperature

22. 2. System Specification 2.3 12 Stages of Heat Rejection & Heat Addition Control Addition Control Example 2: ON Temperature set-pointSelection OUT330°CHeat reject stage 1 OUT431°CHeat reject stage 2 The first cooling tower will run when the T w goes higher than 30°C The second cooling tower will run when the T w is further increase to 17°C Note: T w = water temperature

23. 2. System Specification 2.3 12 Stages of Heat Rejection & Heat Addition Control Addition Control Example 3: ON set-pointOFF set-pointSelection OUT117°C20°CHeat add stage 2 OUT218°C21°CHeat add stage 1 OUT330°C27°CHeat reject stage 1 OUT431°C28°CHeat reject stage 2 If T w increase from 18°C to 21°C, the boiler will turn off If T w decrease from 30°C to 27°C, the cooling tower will turn off If 18°C < T w < 30°C, both cooling tower or boiler will not run Note: T w = water temperature

24. 2. System Specification 2.4 Pre-cool & Pre-heat Protection Function when the system is OFF The function will active according to the Too High / Low temperature set Pre-cool / heat temperature hysterisys = 5°C (fixed) Open Heater 3 Open Heater 2 Open Heater 1 Close Heater 3 Close Heater 2 Close Heater 1 Pre_Tc: Pre_Cool Temperature (Pre_Tc = Too low protect temperature) Pre_Tc + 5 Pre_Tc + 3 Pre_Tc Pre_Tc -2 Open Heat- reject 1 Open Heat- reject 2 Open Heat- reject 3 Pre_Th: Pre_Heat Temperature (Pre_Th = Too high protect temperature) Pre_Th + 2 Pre_Th Pre_Th - 3 Pre_Th - 5

25. 2. System Specification 2.4 Pre-cool & Pre-heat Protection Example: Too High Temperature: 43°C (adjustable) Too Low Temperature: 10°C (adjustable) * When the water temperature is at or below 0°C, all the heating stages will be ON, regardless the ON/OFF temperature setting

26. 2. System Specification 2.5 Outdoor (OD) Air Reset Applicable for Heat Add set points at very low outdoor air temperature (start at 16°C) OD reset range: 1 – 5 °C (adjustable) OD Air Temperature (°C) -17-8 0 816 OD Air Reset Range (°C) 0 - 5°C

27. 2. System Specification 2.6 Emergency Protection 2.6.1 Low / Too Low Temp Protection 2.6.1 Low / Too Low Temp Protection System On Sound Alarm System Continue Running Yes System Off Sound Alarm T W ≤ T LW ? No T W ≤ T TLW ? Yes No Note: T W = Water Temp T LW = Low Water Temp T TLW = Too Low Water Temp

28. 2. System Specification 2.6 Emergency Protection 2.6.2 High / Too High Temp Protection 2.6.2 High / Too High Temp Protection System On Sound Alarm System Continue Running Yes System Off Sound Alarm T W ≥ T HW ? No T W ≥ T THW ? Yes No Note: T W = Water Temp T HW = High Water Temp T THW = Too High Water Temp

29. 2. System Specification 2.6 Emergency Protection 2.6.3 Loss of Flow 2.6.3 Loss of Flow 10s after System On Sound Alarm Lead Pump Off Lag Pump On Error System Off Sound Alarm Check water flow for 15s Normal Check water flow for 15s Error Normal

30. 2. System Specification 2.6 Emergency Protection 2.6.4 Sensor Error 2.6.4 Sensor Error Either Water Sensor or OD Air Sensor fail will sound the alarm System will be shut off

31. 2. System Specification 2.7 Error Description

32. 3. Operation 3.1 LCD Panel Interface & Setting 3.2 Operation Limits 3.3 Default Setting Reset Switch

33. 3. Operation 3.1 LCD Panel Interface & Setting EnterESC LEFT RIGHT DOWN UP

34. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.1 Main Menu 3.1.1 Main Menu By pressing the Button ESC Main Menu Error Test Status Setting

35. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.2 Status 3.1.2 Status ESC Status Output Stage Temp Pump Water Flow: Yes (No) Pump Run Time 1# : On (Off) 1# : Cool (Heat) On (Off) 2# : On (Off) Water Temp: xxx°C (°F) OD Temp: xxx°C (°F) On : xxx Off : xxx°C (°F) 2# : Cool (Heat) On (Off) (3-12#): Unused Pump1: xxhr Pump2: xxhr

36. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.3 Setting 3.1.3 Setting Password Protected During power ON, the ‘Setting’ can only be viewed. The system MUST be turned OFF in order to change the Setting parameters.

37. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.3 Setting 3.1.3 Setting ESC Setting ODA reset Enable (Disable) Temp Pump Output Config Other Mode: Auto (Manual) Lead Pump: 1# (2#) Password Protected Switch Cycle: xxxhr Pump Switch Check Time: xxxs Reset Run Time Min Run TM: xxxs ESC

38. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.3 Setting 3.1.3 Setting Pump Mode: - Auto >The lead lag cycle operation is activated - Manual >Only the lead pump is activated Lead Pump :1# / 2# >The 1 st or 2 nd pump can be set as lead pump in the operation Switch Cycle: xxxhr >The time for a pump to switch over to another pump Pump Switch Check Time: >The time to check the water flow after pump is On Reset Run Time: >To reset the record of the total pump run time Min Run TM: xxxs >The minimum time required for a pump to operate

39. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.3 Setting 3.1.3 Setting ESC Setting ODA reset Enable (Disable) Temp Pump Output Config Other Cool Stage: xx Heat Stage: xx Password Protected Interstage Time: xxs ESC

40. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.3 Setting 3.1.3 Setting Output Config Cool Stage: >To set the number of cool stage for the system operation Heat Stage: >To set the number of heat stage for the system operation Interstage Time: xxs >The delay time between every stages to start operation

41. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.3 Setting 3.1.3 Setting ESC Setting ODA reset Enable (Disable) Temp Pump Output Config Other Water Temp Alarm Temp Hysterysis Password Protected High TMP: xxx°C (°F) Too Hi TMP: xxx°C (°F) Low TMP: xxx°C (°F) Too Low TMP: xxx°C (°F) OD reset TMP: xxx°C (°F) ESC Set Stage Temp

42. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.3 Setting 3.1.3 Setting Temp (a) Water Temp Alarm High TMP: xxx°C / °F >Water temperature in warning temperature (system still on) Too Hi TMP: xxx°C / °F >Maximum allowable water temperature before system shut off Low TMP: xxx°C / °F >Water temperature in warning temperature (system still on) Too Low TMP: xxx°C / °F >Minimum allowable water temperature before system shut off ODresetTMP: xxx°C / °F >The temperature range for heat addition On/Off stages that responding to the OD air temperature

43. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.3 Setting 3.1.3 Setting ESC Setting ODA reset Enable (Disable) Temp Pump Output Config Other Water Temp Alarm Temp Hysterysis Password Protected Cool Stage: xxx°C (°F) Heat Stage: xxx°C (°F) ESC Set Stage Temp

44. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.3 Setting 3.1.3 Setting Temp (b) Temp Hysterysis Cool Stage: xxx°C / °F >The temperature difference between ON and OFF of a Cool Stage Heat Stage: xxx°C / °F >The temperature difference between ON and OFF of a Heat Stage

45. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.3 Setting 3.1.3 Setting ESC Setting ODA reset Enable (Disable) Temp Pump Output Config Other Water Temp Alarm Temp Hysterysis Password Protected Heat Rej: xxx°C (°F) Heat Add: xxx°C (°F) ESC Set Stage Temp

46. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.3 Setting 3.1.3 Setting Temp (c) Set Stage Temp Heat Rej: xxx°C / °F >The first cool stage temperature setting Heat Add: xxx°C / °F >The first heat stage temperature setting

47. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.3 Setting 3.1.3 Setting ESC Setting ODA reset Enable (Disable) Temp Pump Output Config Other Password Protected

48. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.3 Setting 3.1.3 Setting ODA reset Enable / Disable To enable / disable the OD Air Reset function

49. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.3 Setting 3.1.3 Setting Setting ODA reset Enable (Disable) Temp Pump Output Config Other New Password: xxxx Temp Unit: °C (°F) Key Back Light: Enable (Disable) LCD Back Light: Enable (Disable) Buzzer: Enable (Disable) Set Date: DD-MM-YY Set Time: hh:mm:ss Password Protected ESC

50. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.3 Setting 3.1.3 Setting Other New Password: xxxx >To set new password. Default password = 8888 Temp Unit: °C / °F >To set the temperature unit Key Back Light: Enable / Disable >To enable / disable the LCD panel key back light LCD Back Light: Enable / Disable >To enable / disable LCD panel screen back light Buzzer: Enable / Disable >To enable / disable the buzzer on LCD panel Set Date: DD-MM-YY >To set the date for the LWC system Set Time: hh:mm:ss >To set the time for the LWC system

51. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.4 Test 3.1.4 Test Test 1#Pump: On (Off) 2#Pump: On (Off) 1#Stage: On (Off) 2#Stage: On (Off) 3#Stage: On (Off) 4#Stage: On (Off) 5#Stage: On (Off) 6#Stage: On (Off) 7#Stage: On (Off) 8#Stage: On (Off) 9#Stage: On (Off) 10#Stage: On (Off) 11#Stage: On (Off) 12#Stage: On (Off) Buzzer: On (Off) Alarm Out: On (Off) Password Protected ESC

52. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.4 Test 3.1.4 Test Must be operated only when the system is OFF or dry run To check the function ability of the system The display returns to default menu after 3 minutes when user stop operating the system or by pressing ESC button

53. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.5 Error 3.1.5 Error Error HistoryDelete Password Protected ESC

54. 3. Operation 3.1 LCD Panel Interface & Setting 3.1.5 Error 3.1.5 Error To store the error records of the system Maximum 10 errors can be recorded or check Error records can be deleted

55. 3. Operation 3.2 Operation Limit

56. 3. Operation 3.3 Default Setting Reset Switch To reset the system setting to default setting After the power supply is Off, switch the switch 1 to ON 81 SW1 ON OFF

57. Thank You