Stulz C7000 - Page 23

23 © STULZ GmbH – all rights reserved EN/06.2019/G57
C7000 INSTRUCTIONS FOR A/C UNITS
Problematic zones:
Zone 2 : max. admissible pressure ratio exceeded, pc/po > 9,0
Zone 3 : max. admissible hot gas pressure pc = 43,5 bar exceeded
Zone 4 : max. compressor current consumption exceeded
Zone 5 : max. suction pressure po = 17 bar (26°C) exceeded
Zone 6 : min. admissible pressure ratio passed under, pc/po < 1,8
(unstable zone for capacity control)
Zone 7 : min. admissible pressure difference passed under,
pc-po < 4bar
(oil transport no longer guaranteed)
Zone 8 : min. hot gas pressure 8 bar (0°C) passed under
Zone 9 : min. suction pressure 3,3 bar (-25°C) passed under
Normal zones:
Zone 1a : Speed range 20120 rps;
max. hot gas temp. = 110°C
Zone 1b : Speed range 20120 rps;
max. hot gas temp. = 120°C
Zone 1c : Speed range 20 - 90 rps;
max. hot gas temp. = 120°C
pc = condensation pressure (= hot gas
press.)
po = suction gas pressure
Condensation
temperature
[°C]
Evaporation
temperature
[°C]
Operating zones of the ICC for R410a
Zone 2
Zone 8
Zone 5
Zone 7
Zone 6
Zone 3
Zone 4
Zone 1b
Zone 1c
Zone
1a
Zone
9