Mydax, Inc.
1M150W
Water Cooled Chiller
Designed for Lockheed Martin
7
CAUTION: DO NOT USE AUTOMOTIVE ANTIFREEZE, residue build up will cause damage the
unit's critical components.
PUSH RESET BUTTON
The RESET button, located below the front panel, must be pushed after an error in the interlock circuit occurs
prior to restarting the system. This resets the power safety interlock loop, which protects the operator and
electrical circuitry.
EXTERNAL "FLOW-OK" RELAY CONTACTS
This unit is equipped with a normally-open relay for an external flow indication. Located on the rear panel
is a BNC connector, labeled "Flow-OK"; the outer shield is common, inner pin is the normally-open
contact. When an adequate flow condition is satisfied, the relay will close the contacts. This feature's trip-
point is settable from 5 to 20 GPM on Test Panel 6; see description in the DIAGNOSTIC DISPLAYS
section of this manual, under TEST PANEL 6.
OUTPUT FLOW ADJUSTMENT VALVE
To adjust the flow and pressure of the recirculation loop, adjust the valve on the rear of the unit labeled "Water
Flow Adjustment Valve". The 100 PSI “Output Pressure” gauge, located on the rear bulkhead, will indicate the
output pressure after the valve. The pressure gauge labeled “Pump Pressure” indicates the internal pump
pressure. The flow rate is visible on the front LCD display panel.
BYPASS VALVE
To divert the recirculation flow from the output path back to the tank, first open the Bypass valve, then close the
output flow adjustment valve. To return from this mode, reverse the procedure; always keeping adequate flow
through the flowmeter. If the flowmeter sees less than 10 GPM flow, the chiller will shut
down to protect the
pump.
An integrated pressure switch will shut down the chiller at an output pressure of 65 psi; if the backpressure is
near 60 psi, this bypass valve should be opened when starting the pump to prevent the switch from kicking out.
DEIONIZATION FILTER
The system is equipped with a deionizing filter; water flow through the filter is controlled by the
microprocessor to maintain the water resistivity between 300K and 500K ohms. On a yearly basis, or if the
unit is unable to maintain resistivity to acceptable level, replace with Mydax part# F1003. This mixed-ion
resin cartridge filter is only available from Mydax.
25 MICRON PARTICLE FILTERS
On the rear of the chiller is two 20 inch particle filters; the two filters are plumbed in parallel to reduce the
pressure drop at the designed high flow volume. Maintenance of these filters shall be to replace them with
like type (DGD-2501-20) when or if the available flow and/or pressure becomes unacceptable. This time
period will depend on the application and usage, as well as the cleanliness of the system.
BNC "Flow-OK" Relay
Normally Open
Common
!
