![background image](http://html1.mh-extra.com/html/york/21rt-47rt/21rt-47rt_installation-operation-and-maintenance-manual_3494818019.webp)
Installation Requirements
16
Installation Diagram of Water System (For Reference Only):
Diagram of Cooling Application
At the system’s chilled water’s (using side) and cooling water’s (heat-source side) three-way valve default state, the
main board only provides control points
Cooling: if the chilled water’s (using side) three-way valve is de-energized, the cooling water’s (heat source side)
three-way valve will be de-energized
Heating: if the chilled water’s (using side) three-way valve is energized, the cooling water’s (heat source side)
three-way valve will be energized
The following valves and temperature sensors are attached to the unit's accessories and control package, and
they must be installed as required:
1. System’s chilled-water flow switch (Total: 1 piece. It shall be installed on chilled water’s total water outlet pipe. See
Article 2. 9 for the installation mode)
2. System’s cooling-water flow switch (Total: 1 piece. It shall be installed on cooling water’s total water outlet pipe. See
Article 2.9 for the installation mode)
3. Module’s chilled-water flow switch (Total: 1 piece. It shall be installed on the outlet pipe of each module’s evaporator.
See Article 2. 9 for the installation mode)
4. Module’s chilled-water filter (1 piece per module. It shall be installed on each module’s evaporator’s water inlet pipe)
5. System’s inflow-water temperature sensor of the cooling water (Total: 1 piece. It shall be installed on cooling water’s
total water inlet pipe. See Article 2.10 for the installation mode)
6. System’s inflow-water temperature sensor of the chilled water (Total: 1 piece. It shall be installed on cooling water’s
total water inlet pipe. See Article 2.10 for the installation mode)
7. System’s outflow-water temperature sensor of the cooling water (Total: 1 piece. It shall be installed on cooling
water’s total water outlet pipe. See Article 2.10 for the installation mode)
8. System’s outflow-water temperature sensor of the chilled water (Total: 1 piece. It shall be installed on chilled water’s
total water outlet pipe. See Article 2.10 for the installation mode)
Note: The water flow switch and the water filter on module’s cooling-water (condenser) side shall be
purchased by the customer.
Cooke Industries - Phone: +64 9 579 2185 Email: [email protected] Web: www.cookeindustries.co.nz