CIAT AQUACIAT POWER LD 1100R, Инструкция по эксплуатации

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12.2.4.3 - Installation
The hydraulic supply for each desuperheater is delivered in
parallel.
The hydraulic connection on the desuperheater water inlet and
outlets must not generate any local mechanical stress on the
exchangers. If necessary, install flexible couplings.
Fit water flow rate balancing and control valves at the exchanger
outlet.
Balancing and control of the flow rates may be performed by
reading the pressure drop in the exchangers.
The pressure drop on each of these must be identical to the total
water flow rate given by the selection programme.
To adjust the balancing valves before starting up the system, refer
to the pressure drop curves below.
It is possible to fine-tune the water flow rate settings for each
desuperheater when the unit is running at full load by trying to
obtain water outlet temperatures which are strictly identical for
each of the circuits.
Desuperheater (plate heat exchanger pressure drop curves)
1
10
100
0,1 1 10 100
1 2 3 4
5 6
Heat exchanger pressure drop (kPa)
Heat exchanger water flow rate (l/s)
B Circuit with 1 compressor (units 602-2000) E Circuit with 4 compressors (units 602-2000)
C Circuit with 2 compressors (units 602-2000) F Circuit with 3 compressors (units 2200-3500)
D
Circuit with 3 compressors (units 602-2000)
G
Circuit with 4 compressors (units 2200-3500)
12.2.4.4 - Operation
The desuperheater water circuit pump (see standard diagram –
item 20, in the section on “Installation and operation of the heat
recovery with desuperheater option”) can be operated in
conjunction with:
- Start-up of the first unit compressor: terminal 37/38
- Heating water requirement: output DO-01, terminal 491/492,
on the EMM board.
A dedicated flow switch (item 29) can also be installed to generate
an alarm if there is a problem with the pump (customer control
system).
The volume of the desuperheater circuit water loop must be as
low as possible to be able to rapidly increase the temperature
during warm-up.
The minimum desuperheater water inlet temperature is 30°C.
This may require the use of a three-way valve (item 31), with its
controller and sensor controlling the minimum required water inlet
temperature.
The desuperheater water loop must include a valve and an
expansion tank, which must be selected based on the water loop
volume and the maximum possible temperature (120°C) if the
pump (item 20) stops working.
12.2.4.5 - Operating limits
LD units
Desuperheater Minimum Maximum
Water inlet temperature at start-up °C 30
(1)
75
Water outlet temperature during operation °C 45 80
Water inlet temperature on shut-down °C 3 75
ILD units
Desuperheater Minimum Maximum
Water inlet temperature at start-up °C 30
(1)
60
Water outlet temperature during operation °C 45 80
Water inlet temperature on shut-down °C 3 60
Note : Do not exceed the maximum operating temperature.
(1) The water inlet temperature at start-up must not be lower than 30°C. On lower
temperature installations, a 3-way valve is required until the desuperheater water
outlet reaches 45°C.
12 - OPTIONS
EN-61
AQUACIAT
POWER
™ LD/ILD