INSTALLATION & OWNER’S MANUAL SYSVRF AHU Box Thank you very much for purchasing our air conditioner, Before using your air conditioner , please read this manual carefully and keep it for future reference.
CONTENTS PAGE PRECAUTIONS....................................................................................... 1 INSTALLATION INFORMATION................................................................ 2 ATTACHED FITTINGS.............................................................................. 3 INSTALLATION METHOD&DIMENSION................................................... 4 MATERIAL AND SIZE OF THE PIPING..................................................... 5 REFRIGERANT PIPE....................
If the refrigerant leaks during installation, ventilate the area immediately. Toxic gas may be produced if the refrigerant comes into the place contacting with fire. After completing the installation work, check that the refrigerant does not leak. Toxic gas may be produced if the refrigerant leaks into the room and comes into contact with a source of fire, such as a fan heater, stove or cooker. CAUTION Ground the air conditioner.
3. ATTACHED FITTINGS Please check whether the following fittings are of full scope. If there are some spare fittings , please restore them carefully. Table.3-1 NAME QUANTITY SHAPE 1. Installation&owner’s manual 1 2. Wire controller 1 3. Wire controller installation&owner’s manual manual 2 4. Wire controller connecting wire group B A D C FUNCTION Wire controller 1 Receive and display signal box 6. Screw ST3.9x25 8 Secure the installation board 7. Plastic expanded tube 8 8. Temp.
4. INSTALLATION METHOD & DIMENSION AHU 5HP S AHU 10HP S AHU 20HP S Units: mm Wire passing-hole Connect to indoor unit Connect to outdoor unit Install vertically Installation method : Hanging Fig.4-1 Wrong installation way Fig.4-2 NOTE 1 2 3 4 5 The controller box can not installation in outdoor occasions,if inevitable,it must increase rainproof precautions,specific methods please contact the local dealar or technical support engineer. As hanging installation please use Screw ST3.
5. MATERIAL AND SIZE OF THE PIPING 6-2 Size of joint pipe for 410A indoor unit Table.6-2 Capacity of controller box A(×100W) CAUTION 1 The connecting distance of each control box and indoor unit should not more than 8 m. 2 This control box can only connect to R410A refrigerant system. 3 This control box can only connect to VRF system. 4 This control box can not connect heat recovery system. 5 During the installation of connecting pipes, do not let air, dust, or other sundries enter to the piping system.
7. ELECTRICAL WIRING Table.7-3 The maxium current of AC motor Model AHU 5HP CAUTION The outdoor and indoor units should use separate power supply with rated voltage. but all the indoor units in the same system shoud be use the same power. The external power supply to the air conditioner should have ground wiring, which is linked to the ground wiring of the indoor and outdoor unit. The wiring work should be done by qualified persons according to circuit drawing.
7-4 Electric control box wiring figure Indoor temp sensor (T1), indoor evaporator intermediate temp sensor (T2), indoor evaporator outlet temp sensor (T2B), please connects respond to the wiring nameplate. T2C T1 T2B T2 T2 T1 T2B Connector Fig.
8. APPLICALTION CONTROL 8-1 Capacity setting Set the dial switch ENC1 on the main control board by different usage. After setting, be sure to turn off the total power switch and then switch on. The setting function can not be carried out if not to turn off the total power switch and then switch on. ENC1 Fig.8-1 ● Function specification: ENC1——Cooling capacity setting, set the cooling capacity of this machine (Table. 8-1). Table.
Shown as Table 8-3, DX AHU box with capacity dial code from 0 to A occupy 1 address. DX AHU box with capacity dial code of B occupies 2 addresses. DX AHU box with capacity dial code of C occupies 3 addresses. DX AHU box with capacity dial code of D occupies 4 addresses. DX AHU box with capacity dial code of E occupies 5 addresses. DX AHU box with capacity dial code of F occupies 6 addresses.
9. CONTROLLER SELECTION 9-2 SIEMENS controller The DX AHU box can be controlled by SYSTEMAIR controller and SIEMENS controller. The status of SW3 on the main board will decide which controller has been selected. SW3 ON When SIEMENS controller has been selected, only SIEMENS controller can be use to control the DX AHU box. The signal from SYSTEMAIR controller will not be responsed except the address set and inquire signal.
M D4 D3 S Y1 M 14 13 34 44 54 53 Terminal block Power 24V MP 24V Y1 M Y2 D1 M D2 D3 M D4 D5 M INFO SIEMENS POL 638.70 ALARM ESC 13 14 23 24 33 34 43 44 53 54 63 64 SIEMENS controller Fig.9-4 Note, 1. The distance between SIMENS controller and DX AHU control box should less than or equal 15 m. 2. If several DX AHU boxes parallel connection control one indoor unit, SIEMENS controller only need to be connected with master DX AHU box. 3.
9-2-3 Operation instruction. When SIEMENS controller has been selected, DX AHU box will operate according to the control signal from SIEMENS controller and output alarm, defrost and run status signal. 10. DEFINITION OF EACH DIAL SWITCH SW3 Definition SW3 ON 12 SW3 ON 12 SW1 Definition Note：the quantity set of slave DX AHU control box only need in master indoor unit. Table.
11. TROUBLE SHOOTING Table.11-1 NO.
MD14IU-033BW 202000172668
