Carrier AquaSnap 61AF 055 - 6.1 Unit Operating Range

6 - APPLICATION DATA
6.1 - Unit operating range
Condenser Minimum Maximum
Entering water temperature at start-up °C 8 57
Leaving water temperature during operation °C 30 65
Entering/leaving water temperature
di󰀨erence
K 3 (2)
Evaporator Minimum Maximum
Entering air temperature, standard unit
(1)
°C -20 40
Entering air temperature, unit with option °C -15 40
Note : Do not exceed the maximum operating temperature.
(1) Outside temperature: For transport and storage of the 61AF units the minimum
and maximum allowable temperatures are -20°C and +50°C. It is recommended
that these temperatures are used for transport by container.
(2) Refer to the minimum water ow rate for each machine (see chapter 6.2).
Entering air temperature, °C
Leaving water temperature, °C
20
25
30
35
40
45
50
55
60
65
70
-25-20 -15-10 -5 0510 15 20 25 30 35 40 45
Full load
6.2 - Plate heat exchanger water ow
61AF
Maximum ow rate with
hydraulic module, l/s
(1)
Maximum ow rate
without hydraulic
module, l/s
(2)
22 1,8 1,8
30 2,4 2,4
35 2,8 3,1
45 3,8 3,8
55 4,6 4,6
75 5,9 6,4
105 6,1 8,5
(1) Maximum ow rate at an available pressure of 20 kPa minimum.
(2) Maximum ow rate at a water temperature di󰀨erence of 3K in the plate heat
exchanger.
NOTE: For a domestic hot water application (leaving water
temperature = 65°C), the water temperature di󰀨erence must
be 8 K minimum for operation at 100% capacity.
6.3 - Minimum water ow rate
Operation below the minimum ow rate of the machine can cause
a risk of freezing and excessive fouling of the condenser.
Leaving water temperature, °C
0.35
0.40
0.45
0.50
0.55
0.60
0.65
0.70
0.75
25 35 45 55 65
Minimum water ow rate,, l/s
1 61AF 022
2 61AF 030
3 61AF 035
Minimum water ow rate, l/s
Leaving water temperature, °C
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
1.25
1.30
25 35 45 55 65
1 61AF 045
2 61AF 055
Minimum water ow rate, l/s
Leaving water temperature, °C
1.00
1.20
1.40
1.60
1.80
2.00
2.20
2.40
25 35 45 55 65
1 61AF 075
2 61AF 105
6.4 - Maximum plate heat exchanger water ow
rate
This is limited by the permitted plate heat exchanger pressure
drop. Also, a minimum condenser ΔT of 3 K must be guaranteed,
which corresponds to a water ow rate of 0.09 l/s per kW.