Mueller PMC 40/50 - Description of the Equipment; Refrigeration Components; Liquid Solution Flow Components; Electrical Components

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
1.4 DESCRIPTION OF THE EQUIPMENT
The Mueller bakery chiller evaporator assembly is available in two sizes and two model variations to meet
installation and application needs.
A. Sizes:
• PMC 40/50: Nominal 50-gallon storage capacity to be used with a 2 horsepower (HP) condensing unit.
• PMC 70/120: Nominal 120-gallon storage capacity to be used with a 3.5 HP condensing unit.
B. Model Variations:
• RC: Evaporator assembly and remote condensing unit.
• RS: Evaporator assembly and solenoid valve for a rack system.
1.5 REFRIGERATION COMPONENTS
The refrigeration components of the evaporator assembly include a thermal expansion valve for refrigerant control,
a stainless steel evaporator that is outside a baked, glass-lined water tank, and inner-connect refrigerant piping.
Single point refrigeration piping connections are provided for ease of installation (see Section 2.5).
1.6 LIQUID SOLUTION FLOW COMPONENTS
The liquid solution flow components include a baked, glass-lined, and insulated water storage tank; a water
solenoid valve to control make-up water and recirculation; a circulation pump; and inner-connect piping. Single-
point
3
⁄4" MPT connections are provided for water inlet and chilled water outlet.
This system is designed to maintain the water level in the storage tank after each batch of chilled water is drawn.
Make-up water will not enter the storage tank during the batch draw, eliminating temperature blending of warmer
make-up water and chilled water.
1.7 ELECTRICAL COMPONENTS
All wiring must be performed in compliance with the National Electric Code and local codes and regulations.
The control box contains fuses for system protection. Fuse failure requires troubleshooting to determine the cause
of failure and replacement with the same fuses, as described in Section 5.0.
The electronic temperature control can be set for temperature control of chilled water and temperature display in
Fahrenheit or Celsius. Programming is described in Section 4.0.
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