elco AEROTOP L, Planner Manual

Page: 16 / 48

Technical data
Fouling and glycol use correction factors,
overload and control device
Overload and control device calibrations
The value entered refers to units supplied with a hydronic group installed on board
Refrigerant side Open Close Value
High pressure safety switch
kPa 4200 3200 -
Low pressure safety switch
kPa 50 130 -
Low pressure safety valve
kPa - - 3000
Compressor discharge high temperature safety thermostat
C° 115 75 -
Water side
Antifreeze protection
C° 4 20 -
High pressure safety valve
kPa - - 600*
Fouling correction factors
Internal exchanger
m²K/W F1 FK1
0,44x10(-4) - -
0,88x10(-4) 0,96 0,99
1,76x10(-4) 0,93 0,98
The cooling performance values provided in the tables are based on the external exchanger having clean plates (fouling fac-
tor 1). For different fouling factor values, multiply the performance by the coefficients shown in the table.
F1 = Cooling capacity correction factors
FK1 = Compressor power input correction factor
Correction factors for Glycol use
% ethylene glycol by weight
Freezing point °C 0 -4 -9 -16 -23 -37
Correction factor for unit cooling capacity Nr 1 0,984 0,973 0,965 0,96 0,95
Correction factor for flow rate Nr 1 1,019 1,051 1,092 1,145 1,2
Correction factor for system pressure drop Nr 1 1,118 1,268 1,482 1,791 2,1
The correction factors shown refer to water and glycol ethylene mixes used to prevent the formation of frost on the exchang-
ers in the water circuit during inactivity in winter.