FORM 150.60-NM4
YORK INTERNATIONAL 49
FIG. 15 – 5 STEP LOADING/UNLOADING (RETURN WATER CONTROL)
FIG. 16 – 7 STEP LOADING/UNLOADING (RETURN WATER CONTROL)
LD02091
LD02090
NOTE:
The micro controls loading and unloading
on a 10 STEP scale regardless of the num-
ber of stages present. Therefore, loading
and unloading responses on 5 Step (stan-
dard) chillers may appear delayed (time
between stages increased) when miss-
ing steps are activated or deactivated by
the micro.
NOTES:
1. The “Lead Comp + 2 Steps, Lag Comp
Off” Step is skipped on a temperature
drop.
2. The micro controls loading and unload-
ing on a 10 STEP scale regardless of
the number of stages present. There-
fore, loading and unloading responses
on 7 Step (optional) chillers may ap-
pear delayed (time between stages in-
creased) when missing steps are acti-
vated or deactivated by the micro.
7 STEP (OPTIONAL, See page 68)
5 STEP (STANDARD, See page 68)
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