American Standard TRACER CH532 - Manual (Page 13)

Comp seq: Compressor sequencing
The Auto sequence intend to have
equivalent numbers of starts and
stops and an equivalent number of
compressor working hours. The
compressor start order will prioritize
the compressors which have the
least number of working hours.
Ckt1/2: Circuit 1/2 operation
Enable: circuit operational
Disable: circuit non-
operational
Note: It is possible to disable both
circuit 1 and 2. Water pump will be
kept in operation
5. Customer Inputs and Outputs
To access one of the parameters
displayed, press and change
value using or . Confirm the
value by pressing
Analog Input: Signal type
0..10V (factory setting)
0..1V
0..20mA
4..20mA
Note: the total amplitude
corresponds to reset delta of +20°C
between 0%(0V,OA or 4 mA) and
100% (10V,1V, or 20 mA)
Ana. Input External setpoint reset
Y = Enabled
N = Disabled
Pump Timer: Time between unit stop
(by keyboard or external contact)
and stop of the pump
(1 to 10 min - factory setting = 1 min)
6. Customer outputs configuration
Default I/O: (NO9 / NO11)
This output will be used to give an
information about the circuit status:
A configuration parameter will allow
to choose between the following
three indications concerning this
circuit:
ALL: All alarms (manual and
automatic reset)
ALL But LA: All alarms but
without Low Ambient alarm
MR only: Manual reset
alarms only (factory setting)
Status output: (NO10)
Add Heat: indicate an
additionnal heat demand
Unit State Send data telling
that at least one
compressor is ON
(factory setting)
CG-SVU01B-E4 13
4. Operating mode
To access one of the parameters
displayed, press and change
value using or . Confirm the
value by pressing
Mode: Operating mode
Cooling: Cold water
production (default factory
setting)
Heating: Hot water
production (Reversible
chillers only)
Extern: (external control)
Note: When switching from cooling
to heating mode or from heating to
cooling mode, unit will stop for 15 s
before restarting.
To allow chiller waterflow rate
adjustment disable circuit 1 and 2,
then start the unit.
1-2: fix order
Single circuit Dual circuit
Start order A1,B1 A1, A2, B1, B2
Stop order B1, A1 B2, B1, A2, A1
2-1: fix order
Single circuit Dual circuit
Start order B1,A1 A2, A1, B2, B1
Stop order A1, B1 B1, B2, A1, A2
Rotation
Single circuit Dual circuit
Start order A1,B1 A1, A2, B1, B2
Stop order A1,B1 A1, A2, B1, B2
Auto (default factory setting)
Mode Cooling
Comp seq Auto
Ckt1 Enable
Ckt2 Enable
Analog Input 0..10V
Ana. Input Disable
Customer settings menu:
“Settings”
Alarm Out: MR only
State Out: Unit state
Pump Timer: 01 min