Specifications

Dimplex Thermal Solutions 1800-YOU-KOOL
PRE-STARTUP PROCEDURE:
1. Complete all steps of the installation process
before applying power to the chiller.
2. If the unit is equipped, ensure the system
switch is in the OFF position, then turn on the
main power disconnect. The temperature
controller will turn on and automatically go into
a self-test. When the self-test is complete, the
controller will begin to monitor the process
fluid.
3. For units that run on three-phase power,
motor rotation must be checked and
corrected to avoid damaging the chiller
and voiding the warranty. If the chiller is
equipped with a phase protector, the unit will
not start up and may display a fault if phase
rotation is not correct. Correcting phase
rotation should make this fault go away.
Single phase units will not be affected by any
certain phase rotation and should continue on
with step 4 of the pre-startup procedure.
If the unit is equipped with a process fluid
pump, phase rotation can be checked by briefly
turning on the system and allowing the pump
to energize. Watch the rotation of the cooling
fan on the pump to see that it is turning in the
direction indicated by the rotation arrow on the
pump motor. Do not use condenser fans to
judge phase rotation as many three phase
units have single phase fans and will run
correctly from DTS even with incorrect power
phasing.
If the unit does not have a pump or any other
visual method of checking rotation, a phase
checking device can be used to check power at
the disconnect. All components of the chiller
are wired to operate with a “right-hand” phase
rotation. If you do not have a phase checking
device, a certified refrigeration technician
should be utilized to monitor refrigerant
pressures as the chiller compressor comes
online.
All motors within the chiller are
synchronized at the factory for proper
rotation. If one motor is turning in the wrong
direction, all other motors will as well. DO
NOT change the orientation of any motor leads
within the chiller. If phase rotation is incorrect,
shut off the power feed and change any two
incoming power leads BEFORE the main
disconnect.
4. Chillers two tons or larger are equipped with a
compressor crankcase heater. These units
must have power supplied to the unit with only
the disconnect switch on for 8 hours prior to
starting the chiller. This will raise the
temperature of the compressor oil
enough to vaporize any refrigerant
that may be in the crankcase oil.
Failure to allow this warm-up
can result in compressor damage.
5. Ensure all process fluid lines and shutoff valves
are open and the system is able to flow freely.
Re-check the fluid level in the system before
continuing with the startup.
INITIAL STARTUP & OPERATING
PROCEDURE:
1. Complete all steps of the pre-startup procedure
before starting the chiller process.
2. Before turning on the chiller system, become
familiar with the operation of the temperature
controller on the chiller. Refer to the
temperature controller guide in this manual for
instructions.
3. Turn on the chiller process by moving the
selector switch to either ON or LOCAL. If the
unit is wired to start remotely, turn the selector
switch to REMOTE and start the chiller from the
other location.
Chillers that do not have a process selector
switch or remote control should begin the
chilling process as soon as the disconnect
switch is turned on.
4. If the unit is equipped with a process pump, it
will energize and produce flow as soon as the
chiller is turned on. Monitor any system