Hypertherm HT2000 Water Muffler - Manual (Page 19)

Page 2-10
INSTALLATION
HT2000/MAX200 Water Muffler Instruction Manual
• Prime the pump by removing the water inlet hose and filling the hose with
water and then reconnecting the hose.
• Energize the pump.
5. With water flowing, check for an even flow of water around the torch and for
leaks around all connections. Tighten connections as necessary. The water
pump will deliver approximately 9 to 11 gallons per minute.
Pump Discharge Hose Water Recovery Checkout
If the pump discharge hose is routed through an overhead festoon system, a check
valve may be required. This can be determined by checking to see if the water from
the pump discharge hose drains back through the pump when the water muffler
system shuts off, and when the water muffler system restarts, the water does not
obtain full flow back to the water muffler before the plasma arc fires. If this condition
occurs, a check valve needs to be installed according to the procedure that follows.
Install Check Valve
Parts required:
• Valve, check, # 034156
• Gland, hose 3/4 NPT X #12 straight (2), # 015052
• Clamp, hose 3/4 - 1-3/4 (2), # 015234
Install the check valve in-line on the pump discharge hose as follows:
1. Cut the pump discharge hose (Fig 2-3) as close to the nozzle assembly as
possible to install the check valve. (The check valve should not be installed
farther than 6 feet (1.8 m) from the nozzle assembly.)
2. Apply liquid pipe sealant on to the threads ofboth glands. Screw glands into the
ends of the check valve and tighten with wrench.
3. Slide the hose clamps over the ends of the discharge hose. Then slide each end
of the hose over the ends of the check valve. Slide the hose clamps over the
ends of the check valve and tighten. (The arrow on the check valve indicates the
direction of water flow and should point in the direction of the nozzle assembly.)
4. Perform Test the System checkout again to ensure proper water muffler opera-
tion.
8-94