Hoshizaki KMD-410MAH, KMD-410MWH manual Water Regulating Valve - Water-Cooled Model Only

14) Turn on the power supply.

8. WATER REGULATING VALVE – WATER-COOLED MODEL ONLY

1)Turn off the power supply.

2)Remove the panels.

3)Close the condenser water supply line shut-off valve, then open the condenser water supply line drain valve.

4)Attach a compressed air or carbon dioxide supply to the condenser water supply line drain valve.

5)Open the water regulating valve by using a screwdriver to pry up on the spring retainer underneath the spring. While holding the valve open, blow out the condenser using the compressed air or carbon dioxide supply until water stops coming out.

6)Recover the refrigerant and store it in an approved container.

7)Disconnect the capillary tube at the condenser outlet.

8)Disconnect the flare-connections of the valve.

9)Remove the screws and the valve from the bracket.

10)Install the new valve.

11)Remove the drier, then place the new drier in position.

12)Braze all fittings while purging with nitrogen gas flowing at a pressure of 20 to 30 kPa..

13)Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of refrigerant to the system (if using an electronic leak detector), and then raise the pressure using nitrogen gas (970 kPa). DO NOT use R-404A as a mixture with pressurized air for leak testing.

14)Evacuate the system, and charge it with refrigerant. See the nameplate for the required refrigerant charge.

15)Connect the flare-connections.

16)Close the condenser water supply line drain valve, then open the condenser water supply line shut-off valve.

42