A.O. Smith UB - 70 User Manuals

Table of Contents

• Introduction

  4
• Regulations

  7
• Scope of delivery

  9
• Description

  10
• Installation and mounting

  11
• 5.1 Wall-mounted in line

  12
• 5.2 Free-standing in line

  13
• 5.3 Free-standing back to back

  14
• 5.4 Connecting the boiler

  15
• 6.1 Heating system

  16
• 6.2 Expansion vessel

  17
• 6.3 Water quality

  17
• 6.4 Gas line

  19
• 6.5 Condensate drain

  20
• 7.1 Parallel boiler connection

  23
• 7.2 Concentric boiler connection

  23
• 7.3 Connecting the flue gas outlet/air supply system

  24
• 7.4 Individual flue gas outlet

  24
• 7.5 Collective flue gas outlet

  27
• 7.6 Condensate vent collective flue gas system

  30
• 8.1 External controls

  33
• 8.2 Wiring diagram

  34
• 9.1 Operational status

  37
• 9.2 Operation

  37
• 9.3 Commissioning

  38
• 9.4 Setting the flow temperature with On-Off-control

  40
• 9.5 Filling heating system

  41
• 11 Parameters

  44
• 11.1 Activate factory settings

  48
• 13 Inspection and maintenance

  49
• 13.1 Maintenance intervals

  49
• 13.2 Checks prior to commissioning

  49
• 13.2.1 Pollution check

  50
• 13.2.2 Control O2 .

  51
• 13.3 Maintenance activities

  52
• 14 Error report

  55
• 15.1 General warranty

  56
• 15.2 Heat exchanger warranty

  56
• 15.3 Conditions for installation and use

  56
• 15.4 Exclusions

  57
• 15.5 Scope of the warranty

  57
• 15.6 Claims

  57
• 15.7 Obligations of A.O. Smith Water Heaters

  57
• Annex A Technical specifications

  58
• Annex B System water additives

  59
• Annex C Dimensions

  60
• Annex D Declaration of conformity

  65