Scotsman Ice MDT5N25, MDT5N40 service manual Refrigeration Service R-404A HP62

Page 30

MDT5N25 & MDT5N40

REFRIGERATION SERVICE: R-404A (HP62)

THIS ICE MACHINE USES HP62 REFRIGERANT AND POLYOLESTER COMPRESSOR OIL.

DO NOT USE MINERAL OIL IN THIS REFRIGERATION SYSTEM.

Pressure-Temperature Chart for HP62

VAPORVAPOR

￿R-404A is a “Near Azeotrope”, and therefore

TEMP. PRESSURE

liquid charging is required.

(DEG F)

(PSIG)

Weigh into the discharge side as much as

-20 . . . .

17

possible of the charge as liquid refrigerant.

-18 . . . .

18

Install a sight glass between the manifold

-16 . . . .

20

and the suction side hose. Carefully meter

-14 . . . .

21

liquid refrigerant into the suction side, using

-12 . . . .

23

the manifold valve to “flash off” the liquid

-10 . . . .

24

before it enters the ice machine. Do this until

-8 . . . .

26

the proper charge has been weighed into the

-6 . . . .

28

system.

-4 . . . .

29

￿When the system is serviced, a special liquid

-2 . . . .

31

0 . . . .

33

line dryer is required.

￿Polyolester oil absorbs water very easily, and

2 . . . .

35

4 . . . .

37

therefore when the system is opened for

6 . . . .

39

service, it must be re-sealed as soon as

8 . . . .

41

possible (15 minutes maximum).

10 . . . .

43

￿Special leak detection equipment is required to

12 . . . .

46

locate small refrigerant leaks. Usually a leak

14 . . . .

48

detector capable of detecting a Halogenated

16 . . . .

50

refrigerant or HFC-134A will work. Check with

18 . . . .

53

the leak detector manufacturer if in doubt.

20 . . . .

55

￿As with any other refrigerant, do NOT mix HP62

22 . . . .

58

with pressurized air when leak testing.

24 . . . .

60

 

26 . . . .

63

 

28 . . . .

66

 

30 . . . .

69

 

32 . . . .

72

 

34 . . . .

75

 

36 . . . .

78

 

38 . . . .

81

 

40 . . . .

85

 

42 . . . .

88

 

44 . . . .

91

 

46 . . . .

95

 

48 . . . .

99

 

50 . . . .

102

 

52 . . . .

106

 

54 . . . .

110

 

56 . . . .

114

 

58 . . . .

118

 

60 . . . .

123

 

62 . . . .

127

 

64 . . . .

132

 

66 . . . .

136

 

68 . . . .

141

May 2001

 

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TEMP.

PRESSURE

(DEG F)

(PSIG)

70 . .

. . . . 146

72 . .

. . . . 150

74 . .

. . . . 155

76 . .

. . . . 161

78 . .

. . . . 166

80 . .

. . . . 171

82 . .

. . . . 177

84 . .

. . . . 182

86 . .

. . . . 188

88 . .

. . . . 194

90 . .

. . . . 200

92 . .

. . . . 206

94 . .

. . . . 212

96 . .

. . . . 219

98 . .

. . . . 225

100. . . . . 232

102. . . . . 239

104. . . . . 246

106. . . . . 253

108. . . . . 260

110. . . . . 268

112. . . . . 275

114. . . . . 283

116. . . . . 291

118. . . . . 299

120. . . . . 307

122. . . . . 316

124. . . . . 324

126. . . . . 333

128. . . . . 342

130. . . . . 351

132. . . . . 360

134. . . . . 370

136. . . . . 379

138. . . . . 389

140. . . . . 399

142. . . . . 409

144. . . . . 420

146. . . . . 430

148. . . . . 441

150. . . . . 452

152. . . . . 464

154. . . . . 475

156. . . . . 487

158. . . . . 499

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Contents Table of Contents IntroductionMDT5N25 & MDT5N40 Minimum Maximum For the Installer Environmental LimitationsInstallation Limitations Service Limitations Water LimitationsCounter Top or Machine Stand Installation For the InstallerMachine Stand Installation Unpack and install the ice and water spoutsFor the Installer Wall Mount Kit For the Plumber Conform to ALL Applicable CodesFor the Electrician For the Installer Final Check List Initial Start UP Pre Start InspectionStart Up Component Description ICE Sweep Bearing Breaker Motor Evaporator Auger Water Seal Circuit Board On/Off Switch ManualComponent Description Control Box Potential RelayStart up consists Splash panel cleaningElectrical Sequence Shut Down consistsOperation Water Refrigeration Schematic Operation RefrigerationOperation Ice Vending ContainerDispense Area Sanitation Cleaning and Sanitizing Scotsman Ice Machine Cleaner contains acidsTo Sanitize Check and tighten all bolts and screws Maintenance and Cleaning Moving Parts HazardService Diagnosis Symptom Possible Cause Probable CorrectionMDT5N25 & MDT5N40 Off Timer Service Diagnosis Circuit BoardPower Bin EmptyRemoval and Replacement BIN Controls Ice Level SensorsRemoval and Replacement Bearing And Breaker To Remove the Breaker Bearing AssemblyTo Remove the Auger Removal and Replacement Water Seal To Remove the Water SealTo Replace the Water Seal For Access to the Evaporator to Gearmotor bolts To Replace the EvaporatorTo Reassemble the Evaporator and Auger To Remove and Repair the Gearmotor Assembly Electrical Shock HazardTo Inspect the gearmotor Refrigeration Service R-404A HP62 Do not USE Mineral OIL in this Refrigeration SystemRefrigeration Service General InformationOnly a HFC type dryer should be used Liquid Charging Circuit Board ServicePrinted Circuit Board Handling Precautions Instructions for R-404A

MDT5N40, MDT5N25 specifications

The Scotsman Ice MDT5N25 and MDT5N40 models are part of a sophisticated line of ice machines designed for commercial use. These models stand out for their efficiency, reliability, and advanced technology, making them ideal for restaurants, bars, and other food service establishments that require a constant supply of ice.

One of the main features of the Scotsman MDT5N25 and MDT5N40 models is their ability to produce high volumes of ice quickly while maintaining energy efficiency. These machines are designed to provide a steady supply of ice, ensuring that businesses can meet the demands of their customers without interruption. The MDT5N25 can produce approximately 260 pounds of ice per day, while the MDT5N40 takes it a step further by producing around 450 pounds daily. These capacities make both models suitable for various applications, from small cafes to larger dining venues.

Both models are equipped with Scotsman’s proprietary EcoX technology, which enhances energy efficiency and reduces water consumption. This technology employs advanced engineering designs that minimize waste and optimize production cycles. This focus on sustainability not only helps reduce operational costs but also appeals to environmentally conscious businesses.

The MDT5N25 and MDT5N40 also feature a self-cleaning mechanism that simplifies maintenance and ensures consistent ice quality. The automatic cleaning cycle helps prevent limescale and bacteria buildup, providing peace of mind for operators who prioritize hygiene and food safety.

In terms of design, both models boast a compact footprint, making them suitable for establishments with limited space. They come with a built-in storage bin that efficiently holds large quantities of ice, streamlining operations and making it easy for staff to access ice when needed. The sleek stainless steel finish of the machines not only enhances their durability but also ensures they can blend seamlessly into any commercial kitchen environment.

The user-friendly control panel on both the MDT5N25 and MDT5N40 allows for easy adjustments and monitoring of the machine’s performance. Operators can easily keep track of production levels and patterns, ensuring they can manage their ice supply effectively.

In conclusion, the Scotsman Ice MDT5N25 and MDT5N40 models represent a robust solution for commercial ice production, combining efficiency, advanced technology, and ease of use. With their impressive output capacities, energy-efficient designs, self-cleaning features, and durable construction, these machines are perfect for businesses that rely on consistent ice production to meet their needs.