Marco MT Series - Table of Contents

1000762#, 763#, 764#, 765#, 766#, 1762#, 1763# Service Manual for REVIEW
Page 2 of 33
CONTENTS:
1. INTRODUCTION ............................................................................................................................. 3
2. SAFETY INSTRUCTIONS .................................................................................................................. 3
3. SPECIFICATIONS ............................................................................................................................. 4
4. INSTALLATION ............................................................................................................................... 5
4.1 MT Boiler Installation .........................................................................................................................5
4.2 Filter Installation .................................................................................................................................7
5. BOILER SETUP ................................................................................................................................ 8
5.1 Operating Boiler for the First Time .....................................................................................................8
6. OVERVIEW & OPERATION ............................................................................................................. 9
6.1 MT Boiler Operation ...........................................................................................................................9
6.2 MT Dual Tap Boiler Operation ......................................................................................................... 10
7. SERVICE SET UP ........................................................................................................................... 12
7.1 Changing Temperature .................................................................................................................... 12
7.2 Filter Mode ...................................................................................................................................... 13
7.3 Changing from Celsius to Fahrenheit .............................................................................................. 14
7.4 Heat Fill Selection ............................................................................................................................ 15
7.5 Power Selection. .............................................................................................................................. 16
8. ROUTINE MAINTAINENCE/INTERNAL ACCESS ............................................................................ 17
8.1 Top Lid Removal .............................................................................................................................. 17
8.2 Lower Front Panel Removal ............................................................................................................. 17
8.3 Draining the tank ............................................................................................................................. 18
8.4 PCB replacement ............................................................................................................................. 18
8.5 Dispense Tap removal ..................................................................................................................... 19
8.6 Heater Element Removal ................................................................................................................. 19
8.7 Level Probes - Cleaning & replacement ........................................................................................... 21
8.8 Triac Replacement ........................................................................................................................... 22
8.9 Inlet solenoid Replacement ............................................................................................................. 23
8.10 De-scaling the tank .......................................................................................................................... 24
9. DIAGNOSTICS ............................................................................................................................... 25
10. ELECTRICAL SCHEMATICS ............................................................................................................ 26
10.1 Wiring Diagram ................................................................................................................................ 26
11. PART DIAGRAMS & LISTS ............................................................................................................. 29
11.1 MT4, MT8, MT8F parts .................................................................................................................... 29
11.2 MT8DT parts .................................................................................................................................... 30
11.3 MT25 parts ...................................................................................................................................... 31
11.4 MT30 parts ...................................................................................................................................... 32