JOHNSON CONTROLS
154
FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017
SECTION 7 – MAINTENANCE
LD20185
①
②
③
④
Power Supply/Instrumentation Telephone line
(for remote monitoring)
Tapping for Chemical Cleaning
Air Vent
Control Panel
Drain from Chiller-Heater,
Purge, and Safety Valve
Absorption
Chiller-Heater
Fuel
Outside Scope of Delivery
High Temperature Generator
Within Scope of Delivery
Drainage
Equipment
Tapping for Chemical
Cleaning
Drain Vent
Flue Gas
Outside Scope of Delivery
Three-Way Valve
Install the pump at the high pressure
side of the absorption chiller heater
Chilled/Hot Water Pump
Expansion Tank
Replenishment
Water
Circulating
Header
Cooling Tower
Blow Valve
Cooling Water Pump
Replenishment
Wa
te
r
P
P
P
T
T
T
T
M
Flow Meter
FIGURE 60 -
CHILLED/HOT WATER AND COOLING WATER SYSTEM
STORAGE METHOD OF THE CHILLER-
HEATER
If the chiller-heater needs to be stored long-term, the
storage method varies. A lot depends on the machine
ro
om temperature condition and the storage period. If
the machine room temperature is below 0°C, drain off
the chilled/hot, and cooling water. Dry the tube interi-
ors. Make sure all equipment is completely dry.
Nitrogen gas pressurization inside the absorption chill-
er-heater is required when the storage period exceeds
6 months. Contact your local Johnson Controls Service
Center for more details.
The chiller-heater is not explosion proof.
Highly flammable items, gas, or liquids
should not be handled or stored near
the chiller-heater. Failure to do this may
result in explosion, injury, or damage to
the equipment and/or building.
There are two storage methods available for the chiller
-heater during off-season (winter) or plant suspension;
the wet storage method and the dry storage method.
(The wet storage method is available only where heat
source water and hot water will not freeze.)
Each storage method has its own characteristics. Select
the method to use based on the plant’s features and the
storage period. Details follow.
WET STORAGE METHOD
The wet storage method may be used when there is no
concern about water freezing in winter. Store the ma-
chine in a place where the ambient temperature will
remain higher than 0°C.
If it is likely that the temperature will drop below that,
provide a heater for the machine. If a heater is not pos-
sible, contact your local Johnson Controls service cen-
ter for further information. For details on the wet stor-
age method, see
.
