Total recovery (pressure drop curves for
the plate heat exchangers)
1
10
100
1
10
100
Heat exchanger water flow rate (l/s)
Heat exchanger pressure drop (kPa)
B C D
E F
G
B
Unit LD602R
E
Units LD1200R-LD1600R
C
Units LD650R-750R
F
Units LD1750R-LD2000R
D
Units LD900R-LD1100R
G
Units LD2200R-LD3500R
12.2.5.4 - Operating limits
LD units
Total recovery exchanger
Minimum
Maximum
Water inlet temperature at start-up
°C
25
(1)
60
Water outlet temperature during
operation
°C
30
65
Water inlet temperature on shut-
down
°C
3
70
Note
: Do not exceed the maximum operating temperature.
(1) On start-up, the water inlet temperature must not be below 25°C. For installations
with a lower temperature, a three-way valve is necessary
Operating range in cooling mode
Evaporator water outlet temperature (°C)
Outdoor air temperature (°C)
Part load for
LD 2600-3200
For LD 3500
Key
Full load
Low temperature brine solution option
Part load for LD 2600-3200
Part load for LD 3500
Notes
1. Evaporator ∆T = 5K
2. The unit must be either equipped with frost protection options for the water type heat
exchangers (evaporator and heat recovery) and the hydraulic module (if used), or
the water loop must be protected against freezing by the installer with an antifreeze
solution
3. Operating ranges are guidelines only. Verify the operating range with the electronic
catalogue.
Operating range in heat recovery mode
20
25
30
35
40
45
50
55
60
65
70
-10
-5
0
5
10
15
20
25
63
54
Evaporator water outlet temperature (°C)
Heat recovery water outlet temperature (°C)
Ambient temperature 0°C
Ambient temperature -10°C
Key
Full load
Low temperature brine solution option
Limitation to a part load of 50% below an ambient air temperature of -10
°C
Averaged values. Check the electronic catalogue for details of each unit
Limitation to a part load of 50 % below an ambient air temperature of 0 °C
Averaged values. Check the electronic catalogue for details of each unit
Notes
-
Evaporator ∆T = 5K
-
Condenser ∆T = 5K up to LD2000R and 8K for sizes R to LD2200R to 3500R
-
These operating ranges are guidelines only. Verify the operating range with the
electronic catalogue.
12 - OPTIONS
AQUACIAT
POWER
™ LD/ILD
EN-72
