Mydax, Inc. 1M9W-S Water Cooled Chiller
Lawrence Berkeley Laboratory 4
INSTALLATION
POWER CONNECTION
This chiller requires a 20 amp or larger circuit, 208/230 volt, 60 Hz, 3 phase and is equipped with a line cord
and twist-lock L15-30P electrical plug.
PLUMBING INTERFACE CONNECTIONS
The chiller's 1" female pipe thread (FPT) fitting labeled "TANK OUT" must be plumbed to the inlet of the
device to be cooled. The outlet of the device to be cooled must be plumbed to the chiller's 1" FPT fitting
labeled "TANK IN". This system is equipped with a ½" FPT fitting labeled "DRAIN". It may be desirable to
install a valve at this location prior to the initial filling of the reservoir, for the convenience of future draining
procedures.
The condenser cooling water supply must be plumbed to the chiller's ½" FPT fitting labeled "CONDENSER
IN". The chiller's ½" FPT fitting labeled "CONDENSER OUT" must be plumbed to either a drain or the return
path of the condenser cooling water circuit. Verify that condenser cooling water into and out of the chiller is
unobstructed. Obstructions may cause loss of cooling capacity and eventual overheating.
Both the recirculating loop and the condenser cooling water loop are under pressure when the system is
operating. Check all fluid interface connections now to ensure against leaks.
CIRCUIT BREAKER
Set the circuit breaker mounted on the front of the system. Upon setting the circuit breaker, a message similar
to the following appears on the 2 by 40-character main display:
This display indicates that the system's phase monitor circuit is checking for correct electrical power phase
relationship. Should a live and ground line be reversed, the phase detector reads PHASE MISSING. Correct
the error and the controller no longer indicates PHASE MISSING. If the display reads PHASE REVERSED,
disconnect and switch two of the three phases.
WARNING
The system should be powered for a period of ½ hour before starting, to
allow the crankcase heater to separate the refrigerant from the oil.
FILL RESERVOIR
To fill the system's reservoir, unscrew the fill plug on the top of the vertical stand-pipe for the tank and pour
in the recirculating fluid. If the system is powered before the tank is filled, the "FILL TANK" error message
is displayed at the main panel, the alarm LED is lighted and the audible alarm sounds. Filling the tank
eliminates the alarms. Replace the plug.
PUSH RESET BUTTON
The Reset button, located below the main panel, must be pushed upon powering the system. This resets the
power safety interlock loop, which protects the operator and electrical circuitry.
Output --- Warmup Delay --- Local Set
20.02°C 20.0°C
