Installation Of Water System - York 21RT-47RT Installation, Operation And Maintenance Manual

Compressor's vibration-reduction bracing-component is a white sheet metal part, and the following marks are
pasted on the bracing-component.
Quantity of compressor's vibration-reduction bracing-component:
YCWE021~023 - 4 pcs
YCWE032~034 - 4 pcs
YCWE042~047 - 8 pcs

2.6. Installation of Water System

Pipe's Prefabrication Requirements
 The pipe diameter of unit's water inlet and outlet pipe shall not be less than that of the heat exchanger's water
inlet and outlet pipe.
 The connection between the water pipe and the unit pipe shall adopt the clamp type
 For the welding parts in the pipeline, the welding slag and the impurities shall be cleaned after the welding,
and the welding seam and the surface of the heat-affected area shall be conducted with preservative treatment
(first rust removal, and then brush painting).
! Caution:
 The enterprise engaged in the welding of the metal pipeline shall have the welding process qualification of
corresponding item, and the welder shall hold welder's qualification certificate of corresponding welding
type.
 Pipeline's installation shall comply with the provisions of the national standard GB 50242 Code for
Acceptance of Construction Quality of Water Supply Drainage
Requirements for Pipeline Installation
 Water pipe's connection shall comply with relevant installation procedures. There shall be no foreign matters
in the pipeline, and all water pipes shall meet the local regulations and regulations on the pipeline project.
 During the splicing of the modules, if use wire controller/centralized controller, each group can splice
8 modules at most; 1 to 8 modules can form a communication network. Conduct control with one controller.
The units within one communication network must be equipped with a unique mixed water-outlet-pipe section
and the mixed backwater-pipe section, and they shall be used for installing system's temperature sensor of
inflow & outflow water and the water flow switch.
 When multiple modules are combined, the connected water pipe path must be designed as the same-program
type, in order to facilitate each module to obtain a balanced flow of water.
 The water inlet pipe and outlet pipe of each module need to be provided with the stop valve and pressure
gauge, so as to regulate the water flow and to ensure that the water flow entering each module meets the
operation requirement of the unit (after all the modules are in stable operation, the temperature difference
between the inflow water and outflow water of the chilled water among each modules and the temperature
difference between the inflow water and outflow water of the cooling water shall be balanced), and they can
be used for cutting off the water flow during the maintenance.
 If the module's chilled water (evaporator) and the cooling water (condenser) need to be installed with electric
water valve, it is required that the operation time cannot be more than 20 seconds, and they shall be connected
to the DO15 and DO16 of each module's mainboard.
 The bypass line and the bypass valve must be installed between the water inlet pipe and outlet pipe of the unit,
so as to let the unit carry out the external waterway system's cleaning before the commissioning. Caution: Do
not flush any foreign matter into the evaporator. Close the bypass and open the water valve on unit's water
inlet pipe and outlet pipe after the flushing. The heat exchanger waterway of one unit (one or more modules)
Cooke Industries - Phone: +64 9 579 2185
13
Email: sales@cookeindustries.co.nz
Installation Requirements
Web: www.cookeindustries.co.nz