Hypertherm PAC500 Product Configuration - Manual (Page 19)

1-14 PAC-500
9 SELECT THE WATER SUPPLY SYSTEM OR WATER CHILLER
All PAC-500 systems require cooling water supplied at the rate of approximately 2.5 gpm (9.5 lpm) for
each torch. The water pressure must be 185 psi (12.7 bar). Two choices of water cooling systems
are available: a water supply system, or a water chiller.
Water Supply
The water supply system connects to the domestic water supply or a reservoir and pumps the water to the
PAC-500 system at the required pressure and flow rates. The cooling water exits the return hose into the
building drain system. The domestic water temperature must be below 70
°
F (21
°
C) to insure proper cooing
of the torch.
The water supply systems are available in one-torch and two-torch configurations. Be certain to order the
correct supply or combination of supplies when ordering a multi-torch system. For example; a 3-torch system
would require one 2-torch water supply system plus one 1-torch water supply system, while a 2-torch system
would require only one 2-torch water supply system. Water is not re-circulated or cooled as it is with the
water chiller. A water-softener system may also be required.
9a • Determine the available voltage and where the 1-torch water supply will be placed. Order the system.
9b • Determine the available voltage and where the 2-torch water supply will be placed. Order the system.
Water Chiller
The water chiller for the PAC-500 system is a closed-loop refrigeration unit that is capable of reducing the
water coolant temperature to the electrode well below ambient air and water supply temperature. Having this
capability greatly increases the life of the nozzle and electrode. A source of supply water must be available.
A water softener may also be required.
There are three types of water chillers for use with the PAC-500 system: a 1-torch 600 Amp system, a 1-torch
1000 Amp system and a 2-torch 600 Amp system. When ordering a multi-torch system, specify the proper
number of water chillers for the number of torches being used.
The water chiller should be located near the power track or festoon entrance and must be level to ensure the
water level control switches function properly. The unit should be bolted to the floor, and, if possible, near a
floor drain. The water chiller must have at least 10 inches (254 mm) of free air space at the condenser inlet
and outlet. If mounted above the cutting table, a check valve will have to be installed to keep the water chiller
from draining when the electrode is changed.
9c • Determine the available voltage and where the 1-torch water chiller will be placed.
9d • Determine the available voltage and where the 2-torch water chiller will be placed.
Order the appropriate system.
10 SPECIFY THE COOLING HOSE SET BETWEEN THE WATER SUPPLY OR
WATER CHILLER AND THE CONTROL CONSOLE
Cooling water leads are available for 1-torch and 2-torch systems at a length of 50 feet (15 m).
Additional length hosing can also be ordered.
10 • Order the correct cooling hose set (1- or 2-torch) for the application. Be sure to consider
the path that the hoses will run to attach to the control console.
10a • If the standard hose sets of 50 feet (15 m) are not adequate, order additional length hosing by
specifying extra length needed. (Standard hose set must also be ordered when ordering additional
length hosing).