Sub-Zero Mega Chill User Manual

CONTENTS
1. Accessaries in Box 3
2. Introduction
2.1 Main Features 4
2.2 Hardware Description 4
3. Hardware 5
3.1 Mega Chill User Interface 5
3.2 Input/Output Board 7
3.3 Sensors 8
3.4 Prokey 8
3.5 Transformer 8
3.6 Dimensions 9
3.7 Connections 10
4. Operations 12
4.1 Description - Inputs / Outputs 12
4.2 Mega Chill Keypad 13
4.3 How to Turn On/Off the Chiller 15
4.4 Water Pump 16
4.5 Water Temperature 16
4.6 Set-Point and Differential 16
4.7 Antifreeze 16
4.8 PUMP-DOWN 17
4.9 Water Level 17
5. Programming 18
5.1 Programming Levels 18
5.2 USER Parameters 18
5.3 FACTORY Parameters 19
5.4 Parameter Description & Values 21
6. Alarms 25
7. Technical Specifications 26
8. Precautions & Care 27
1
2 COMPRESSOR2 COMPRESSOR

Sub-Zero Mega Chill Specifications

Operating Environment

operating temperature	-50 C to +50 C0
storage temperature	-20 C to + 70 C
operating humidity	Max 80% (non-condensing)
storage humidity	Max 80% (non-condensing)

Power

max continuous input voltage	230 Vac
input current (closed contact)	10 mA
transformer primary input	230Vac, 50Hz
transformer secondary output 1	9Vac, 350mA
transformer secondary output 2	10Vac, 500mA

Digital Output (Relay)

type	SPDT
contacts	C & NO (C, No, NC for compressor)
rating	250 Vac, 5A(resi)

Analog Inputs

sensor type	Japanese NTC thermistors
specification	10K @ 25 C0
resolution	0.5 C0
accuracy	+/- 1 C0