Medium Temperature Control Method

Use a 2-way valve (for cooling at a higher temperature range) or a mixing valve (cooling) for each control temperature range capacity control, so that system can offer high precision control of ±0.5 degC or less (control the CV value via an input signal for 4 to 20mA DC).
For the control heating operation, adopting an SSC or SCR (optional) allows high precision control.

Capacity Control

• Capacity control function 100 to 33 to 0%
• Starting and stopping the compressor less frequently allows long term operation.
  (No material fatigue caused by vibration during start and stop operations.)
• Decreased power cost through start and stop operations.

Medium Circulation Pump (Optional)

• Designed to match load resistance. (Option)
• Adopted inverter to release air in plumbing after the mold has been replaced for maintenance work. (Option)
• Hot runner temperature maintained inside the mold when operation of the load is stopped (For flow control) (Option)

Customized Specification

Saturated steam is used for the heating source.
Suction head of the refrigerant pump.
Frequency converter of the refrigerant pump.
The liquid contacting sections of the refrigerant circuit are made of SUS (the internal cooling circuit is made with a standard specification)
The "U" or "Y" type strainer on the refrigerator circuit.

Signals with load side devices (Optional)

• 1. A selectable control function for each load.
• 2. Displays alarm and error histories and countermeasures.
• 3. Displays the current flow system (operation status) on screen.
• 4. An analog signal output is provided for each system.
• 5. Switchable operation between remote and local models.
• 6. Communication with remote devices.
• 7. Countermeasure for instantaneous power failure.

Compressor

Semi-hermetic reciprocating type is adopted.
Adopted 2 pole electric motor for model DC-20-W and 4 pole electric motor for larger than DC-30-W.
The compressors can tolerate the hard operation of industrial chiller units.

Condenser

Shell and tube type is adopted.
The majority of faults on refrigerators, when low quality cooling water is used, are attributable to the faulty condensing of the refrigerant due to poor water quality.
Design with marginal capacity.
The condenser is designed with the condensing temperature set to 42 degC.
Compared with competitors set to 45 degC.
Easy cleaning inside the tubes without chemicals for environment concern.

Evaporator

Shell and tube type is adopted.
Design with marginal capacity.
Sufficiently large heat transfer area by setting a temperature difference between the inlet and outlet of the evaporator at 3 degC compared with competitors that are set to 5 degC.
Pressure loss is the lowest.

Refrigerant

R407C (Substitution of Freon)
The ODP (Ozone Depletion Potential) of this refrigerant is zero.

DI water unit (Optional)

Countermeasures for scale adherence.
Maintains the electric conductivity of the system and medium water in the load to 0.1 mS/m (1 uS/cm).
Monitor function.
The electric conductivity meter displays the conductivity of the water medium.
Install the DI water unit inside the system for new installation.
Install the unit at the side of the system for installation to pre-installed systems.