Johnson Controls YORK YLCA Series - Technical Data; Limits of Use; Correcting Factors

The evaporating unit pressure drop can be determined by taking the water pressure drop value for a
YLCA 120 unit and multiplying it by the correcting factor (see Glycol concentration and correcting
tables, see on page 9 ) for a 30% concentration and an average temperature of ‑1.5 °C, i.e.:
-1.5 °C=
1 + (-4)
2
16 kPa x 1.22 = 19.5 kPa.
1.5 Technical data
1.5.1 Limits of use
Model
Voltage limits
Inlet air temperature to the coil
DB
Water outlet temperature
Temperature
difference be‐
tween water
outlet and in‐
let
Nominal at
400
Operating cycle Operating cycle
Minimum °C Maximum °C Minimum °C Maximum °C
Mini‐
mum
°C
Maxi‐
mum
°C
Mini‐
mum
Maxi‐
mum
Cold Heat Cold Heat Cold Heat Cold Heat
YLCA
342 436 -18 (4)
-
46
-
5(1)
(3)(4)
-
15
-
3 7
YLHA -10 (4) 20 30 50(2)
(1)
At lower water temperatures, it is advisable to use glycol-type antifreeze mixtures. Minimum
temp. with glycol ‑5 °C
(2) 50 °C if the inlet air is 0 ºC.
(3) From a water temperature of 0 °C or lower, glycol-type antifreeze mixtures must be used.
(4)
If the outdoor air temperature is lower than ‑5 °C or the water temperature is 0 °C or lower, it is
advisable to use the 2.5 ‑ 4 bar low pressure switch.
Prior to final approval of the installation
Check:
• Voltage remains between 342 ‑ 436 V.
• Power supply cable cross-section is at least as indicated in the corresponding wiring diagrams. The
cable used for the unit power supply must be H05 RN-F or H07 RN ‑ F.
• Operating instructions have been given to the user.
• The warranty card has been filled out.
• Maintenance instructions have been given, or a regular maintenance contract has been signed.
1.5.2 Correcting Factors
Fouling factors
Evaporator
Fouling Factor m2 °C/kW Capacity factor
compressor absorbed
power factor
0,044 1 1
0,088 0,987 0,995
0,176 0,964 0,985
0,352 0,926 0,962
1 Quick installation guide
1.5 Technical data
8