Mueller Bakery Chiller, Models PMC 40/50 and PMC 70/120 Effective February 23, 1999
Installation and Operation Manual, Part No. 9842311 Revised October 17, 2019
3.1 FIRST TIME STARTUP CLEANING PROCEDURE
Before proceeding, ensure the water piping is complete, as described in Sections 2.4 and 5.0, Figure 3, and the
refrigeration piping is complete, as described in Sections 2.5 and 7.0. In addition, ensure the wiring is complete, as
described in Section 5.0.
1. First, open the supply water shut-off valve(s).
2. Open the drain valve located at the outlet of the water storage tank.
3. A toggle switch, located inside the control box in the back panel’s upper right corner, disables the circulation
pump. The up position allows the pump to run and the down position disables the pump. Turn the toggle
switch to the down position.
IMPORTANT: The circulation pump should be disabled on initial startup and any time the water storage
tank is empty. Disabling the circulation pump allows the fill solenoid to fill the tank and prevents the
pump from running dry.
4. Turn the power on to the control panel. Make sure the power is off to the condensing unit during this part of
startup. Push the green push-button switch on the front of the control panel to energize the system, allowing
water to flow into the storage tank. Allow water to flow until clean and clear water is flowing out of the drain.
5. Close the drain valve and allow the storage tank to fill.
6. Turn the toggle switch to the up position and allow the circulation pump to operate for two minutes and turn
the push-button switch off.
7. Open the drain valve again and drain the water from the storage tank. If the water is not clean, repeat the
cleaning procedure.
3.2 FILLING THE SYSTEM
1. Close the drain valve.
2. Turn the toggle switch to the down position.
3. Turn the push-button switch on to fill the system with water again.
4. Open the chilled water valve and allow water to flow until clean.
5. Close the chilled water valve and allow the storage tank to refill with make-up water.
6. Turn the toggle switch to the up position to operate the circulation pump.
7. Complete the initial condensing unit charging procedure. Final refrigerant charging is to be completed in
conjunction with the TEV superheat adjustment, as described in Section 7.0.
5
Section 3.0 – First Time Startup and Cleaning the System
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