York Millennium YCAS 310, Installation Operation & Maintenance

Page: 81 / 124

FORM 201.10-NM3
81
YORK INTERNATIONAL
L E A D S Y S T E M I S
S Y S T E M N U M B E R #
E V A P O R A T O R W A T E R
P U M P S T A T U S O N
E V A P O R A T O R H E A T E R
S T A T U S O N
S Y S # R U N T I M E
1 - 3 - 4 8 - 1 7 D - H - M - S
S Y S # L I Q U I D L I N E
S O L E N O I D S T A T U S O N
This message advises which system is selected as the
lead.
This message indicates the position of auxiliary con-
tacts (optional) for the evaporator water pump:
On = contacts closed, Off = contacts open.
The Evaporator Heater status is controlled on ambient
temperature as follows: If measured ambient falls be-
low 40°F the Evaporator Heater is switched On. If mea-
sured ambient then rises above 45°F, the heater is
switched Off. The evaporator heater prevents water
standing in the evaporator from freezing.
System Data:
The following sequence of five displays are given twice,
firstly for System 1, then for System 2:
This message displays the accumulated Run Time
since the last start in Days (D), Hours (H), Minutes (M),
and Seconds (S).
This message indicates the Liquid Line Solenoid Valve
position: On = Energized / Open, Off = De-energized /
Closed.
This message advises the Liquid Injection Valve posi-
tion On = Energized / Injecting, Off = De-energized /
Closed.
This message advises the number of forward running
pairs of condenser fans on the system.
S Y S # L I Q U I D
I N J E C T I O N V A L V E O N
S Y S # F O R W A R D F A N
S T A T U S 2
S Y S # R E V E R S E F A N
S T A T U S O F F
P R E S S E N T E R T O
D I S P L A Y C O M M O N D A T A
P R E S S E N T E R T O
D I S P L A Y M A S T E R D A T A
This message advises the number of reverse running
pairs of condenser fans on this system.
Once the System Data sequence has been repeated
for the second system, pressing the Enter key again
will loop back to the beginning of the common data
section. To leave the sequence at any point press a
key from another section of the keypad.
YCAS 3 SYSTEM MODELS:
YCAS 3 system models are constructed in two sec-
tions. One section contains numbers 1 and 2 refriger-
ant systems plus the common three circuit evaporator.
This section is called the Master section. The second
section contains number 3 refrigerant system and is
called the
Subordinate
section. Both sections have
their own control panel, but only the master panel is
fitted with a keypad and display.
Operating data for the chiller is stored in three sec-
tions: common data for the whole chiller, master sec-
tion system data and
subordinate
section system
data. Each section of data can be accessed
separately or scrolled through as a continuous loop as
follows:
Pressing the Operating Data key the FIRST time causes
the following message to be displayed:
The Enter key can now be used to scroll through the
common operating data for the chiller followed by the
individual system data for the Master, then the
Subordinate
sections of the chiller.
Pressing the Operating Data key a SECOND time be-
fore pressing the Enter key causes the following mes-
sage to be displayed:
The Enter key can now be used to scroll through the
operating data starting at the data specific to Systems
1 and 2.
Pressing the Operating Data key a THIRD time before
pressing the Enter key causes the following message
to be displayed:
P R E S S E N T E R T O
D I S P L A Y D A T A