Figure 24 - Sequential Operation Flowchart; Figure 25 - Shutdown Exhaust Gas Chiller-Heater Flowchart - York YHAU-CE Installation Operation & Maintenance

Double-effect exhaust gas absorption chiller-heater

Table of Contents

FORM 155.35-ICOM2.EN.CE/GB (1018)

DATE: 10/30/2018

Sequential

Operation

Chilled / Hot Water

Interlock

AND

Sequential

Operation

Sequential Operation

Interlock (Answerback)

Other interlock device and equipment (Earthquake sensor, gas leak detector, ventilation fan, and other relevant interlock equipment.

Other Sequential Operation device and equipment (example: ventilation fan)

NOTES:

1. Create the sequential operation system as shown so that the chilled / hot water pump, cooling water pump, and cooling tower can be started

or stopped automatically with an operation command signal from the chiller-heater control panel.

2. If only one air conditioner is used for this system, connect the operation interlock (answerback) signal from the air conditioner to the chiller-

heater control panel to prevent the chiller-heater from operating without the air conditioner (indicated by broken lines).

3. Create the sequential operation system so that the cooling water pump is automatically stopped when the chilled / hot water pump is

stopped.

4. During heating operation, these devices and equipment do not need to be used.

5. If the chilled / hot water and cooling water system is the common system, it is required to install the isolation valve

on the chilled/hot water and cooling water inlet pipe before the chiller, and interlock these isolation valves with the

chiller control panel. This is mandatory for safe and reliable operation of the chiller and to prevent potential crystallization

of lithium bromide solution and freezing of the evaporator tubes.