MAXA R407C Bedienungsanleitung

MODULAR AIR COOLED LIQUID CHILLERS AND HEATPUMPS

WITH AXIAL FANS AND SCROLL COMPRESSORS FROM 30 kW

TO 520 kW.

AIR CONDITIONING

R407C

A21

TECHNICAL MANUAL

Serie/Series/Serie/Série Emissione/Edition/Au-

sgabeIssue

CD 30÷520 05.07

Catalogo/Catalogue/Katalog/Brochure Sostituisce/Superseedes

Ersetzt/Remplace

MTE0112560020

02.07

CD 30 ÷ 520

CONTENTS

Modular Air-cooled Chiller System

1- Modular air-cooled Chiller System

1. Summarization ..........................................................................5

2. Nomenclature ............................................................................6

3. Outlook view..............................................................................6

4. System principle figure ..............................................................7

5. Specification ..............................................................................11

6. Sound pressure level.................................................................15

7. Digital scroll compressor ...........................................................19

8. The capacity control of the new modular chiller.........................21

9. Advantages of digital scroll compressor ....................................23

10. Features ....................................................................................30

11. Unit installation ..........................................................................32

12. Water system installation...........................................................35

13. Debugging .................................................................................39

14. Maintenance..............................................................................43

15. Troubles and solutions...............................................................46

16. Wiring diagram (main unit) ........................................................47

17. Wiring diagram (auxiliary unit) ...................................................49

18. Wiring & communication diagram..............................................50

19. Installation system figure ...........................................................51

CD 30 ÷ 520

2- Electric control

1. Outlook view .............................................................................51

2. parts descriptions......................................................................52

3. Failure & protections codes ......................................................57

3- Wire controller

1. Outlook view .............................................................................59

2. Pattern & buttons description....................................................60

3. Basic operating conditions ........................................................62

4. Function description..................................................................63

CD 30 ÷ 520

Air-cooled heat-pump module unit

1.Summarization

Maxa Commercial Digital scroll air-cooled heat-pump module unit is designed and produced on

the basement of sufficiently absorbing the top technology in AC areas, adopting self-control

components with high quality made by world famous producers. Moreover, after optimizing, unit can

run more efficiently and more stably. One 60kW module consists of two 30kW units, and several

modules can be formed into a digital scroll air-cooled heat-pump module unit by connecting each

module’s inlet & outlet pipeline in series. The whole unit consists of 1-8 modules (or 2-16 units) and

the max capacity is 480kW(520kW).

Maxa Commercial Digital scroll air-cooled heat-pump module unit can be used widely in civil

construction of AC engineering and industrial engineering, such as hotel, villa, restaurant, hospital,

factory, etc. It is a wise choice for areas where water is insufficient or there are strict limits on noise

level and surroundings.

Relevant noun description:

 Unitüüone independent outdoor unit, including two entire refrigeration system and one

electric controller.

 Main controller üüevery electric control system of unit can accomplish the following functions

independently: Mode input; Data collection; Output interface control; Failure alarm analyzing.

 Digital scroll air-cooled heat-pump module unitüüa unit consists of one or more(1÷8) than one

modules (2÷16 units).

 Wire Controllerüüthe interface between the module and human, it can receive the operation

command and sent them to main controller, meanwhile receive the running state data and

display them.

CD 30 ÷ 520

2. Nomenclature

3. View of 30kW module (composed by just one basic unit)

Cooling capacity (kw)

A: Auxiliary unit

M: Main unit

Digital

Chiller

C D – M 30

CD 30 ÷ 520

View of 65kW module (composed by two basic unit)

4. Principle of system

Basic unit “Main and Auxiliary” from 30kW of cooling capacity is equipped with two independent

refrigerant circuits, with two compressors (1 digital, 1 fixed), just one plate heat exchanger and just

one control main board.

Basic unit “Main” from 65kw is the melt of two basic units of 30kW, so it is composed by 4

independent refrigerant circuits, 4 compressors (1 digital, 3 fixed), 2 plate heat exchanger and 2

control main boards.

Basic unit “Auxiliary” from 65kw is the melt of two basic units of 30kW, so it is composed by 4

independent refrigerant circuits, 4 fixed compressors, 2 plate heat exchanger and 2 control main

boards.

CD 30 ÷ 520

Numbers of modules can be assembled together into a large unit by connecting each own inlet &

outlet pipeline in series; can be connected together modules from 30kW and from 65kW of cooling

capacity until 16 units and 520kW of cooling capacity; here below you can see the connection

principle:

Two modules 30kW connected in series

CD 30 ÷ 520

Two modules 65kW connected in series

Two modules, one of 65kW and one of 30kW connected in series

CD 30 ÷ 520

To correctly operate the unit and ensure normal and safe running when the outdoor Temp is

under 0°C in winter, the following should be noticed:

 If the unit will not be used for a long time, please drain water away to prevent the plate heat-

exchanger from freezing.

 If it is used frequently, it is absolutely forbidden to switch off the power, because the unit has

auto anti-freeze function. Moreover, in order to protect the plate heat-exchanger from freezing

in case the unit stops at night, and it must add some anti-freeze mixture to water system such

as glycol or propylene glycol.

 Water flow switch should be installed correctly; otherwise, the unit may be damaged. What’s

more, the water flow switch should be Queryed periodically if it is work normally.

 If malfunctions occur, it is absolutely forbidden to turn on the unit before the problems are

solved. At the same time, please drain water away to prevent the plate heat-exchanger from

freezing.

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