Table of Contents
Advertisement
Installation - Electrical
Low Voltage Wiring
WARNING
Proper Field Wiring and Grounding
Required!
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements
for field wiring installation and grounding as described
in NEC and your local/state electrical codes. Failure to
follow code could result in death or serious injury.
The remote devices described below require low voltage
wiring. All wiring to and from these remote input devices
to the Control Panel must be made with shielded, twisted
pair conductors. Be sure to ground the shielding only at
the panel.
Note: To prevent control malfunctions, do not run low
voltage wiring (<30 V) in conduit with conductors
carrying more than 30 volts.
Emergency Stop
CH530 provides auxiliary control for a customer specified/
installed latching trip out. When this customer-furnished
remote contact 6K5 is provided, the chiller will run
normally when the contact is closed. When the contact
opens, the unit will trip on a manually resettable
diagnostic.This condition requires manual reset at the
chiller switch on the front of the control panel.
Connect low voltage leads to terminal strip locations on
1A13, J2-3 and 4. Refer to the field diagrams that are
shipped with the unit.
Silver or gold-plated contacts are recommended.These
customer-furnished contacts must be compatible with 24
VDC, 12 mA resistive load.
External Auto/Stop
If the unit requires the external Auto/Stop function, the
installer must provide leads from the remote contact 6K4
to the proper terminals on 1A13, J2-1 and 2.
The chiller will run normally when the contact is closed.
When the contact opens, the compressor(s), if operating,
will go to the RUN:UNLOAD operating mode and cycle off.
Unit operation will be inhibited. Closure of the contact will
permit the unit to return to normal operation.
Field-supplied contacts for all low voltage connections
must be compatible with dry circuit 24 VDC for a 12 mA
resistive load. Refer to the field diagrams that are shipped
with the unit.
74
NOTICE:
Equipment Damage!
Do NOT enable/disable the chiller by removing water
flow or equipment damage can occur.
Ice Building Option
CH530 provides auxiliary control for a customer specified/
installed contact closure for ice building if so configured
and enabled.This output is known as the Ice Building
Status Relay.The normally open contact will be closed
when ice building is in progress and open when ice
building has been normally terminated either through Ice
Termination setpoint being reached or removal of the Ice
Building command. When contact 6K6 is provided, the
chiller will run normally when the contact is open.
CH530 will accept either an isolated contact closure
(External Ice Building command) or a Remote
Communicated input (Tracer) to initiate and command the
Ice Building mode.
CH530 also provides a "Front Panel IceTermination
Setpoint" , settable throughTechView, and adjustable from
20 to 31°F (-6.7 to -0.5°C) in at least 1°F (1°C) increments.
When in the Ice Building mode, and the evaporator
entering water temperature drops below the ice
termination setpoint, the chiller terminates the Ice
Building mode and changes to the Ice Building Complete
Mode.
NOTICE:
Evaporator Damage!
Freeze inhibitor must be adequate for the leaving water
temperature. Failure to do so may result in damage to
system components.
TechView may also be used to enable or disable Ice
Machine Control.This setting does not prevent theTracer
from commanding Ice Building mode.
Upon contact closure, the CH530 will initiate an ice
building mode, in which the unit runs fully loaded at all
times. Ice building shall be terminated either by opening
the contact or based on the entering evaporator water
temperature. CH530 will not permit the ice building mode
to be reentered until the unit has been switched out of ice
building mode (open 5K20 contacts) and then switched
back into ice building mode (close 5K20 contacts.)
In ice building, all limits (freeze avoidance, evaporator,
condenser, current) will be ignored. All safeties will be
enforced.
If, while in ice building mode, the unit gets down to the
freeze stat setting (water or refrigerant), the unit will shut
down on a manually resettable diagnostic, just as in
normal operation.
CG-SVX17E-EN
Hide quick links:
Advertisement
Table of Contents
