Pentair MASTERTEMP 400 HD Pool Heater Manuals (2024)

Product HIN / Code Requirements / Safety Warning

2

3

• Important Notices / Warranty Information

  3

• Code Requirements

  4

• Consumer Information and Safety Information

  5

• General Specifications

  6

• Table of Contents

  8

10

• Heater Description

  10

• Sequence of Operation

  10

• Putting the Heater into Service

  10

• Specifications

  11

• Plumbing Connections

  12

• Valves

  12

• Manual By-Pass

  12

• Automatic By-Pass

  13

• Below Pool Installation

  13

• Water Connections

  14

• Multiple Heater Installation

  15

• Gas Connections

  16

• Gas Pipe Sizing

  16

• Sediment Trap/Drip Leg

  16

• Gas Pipe Escutcheon Installation

  17

• Testing Gas Leaks and Gas Pressure

  18

• Inlet Gas Pressure Requirements

  19

  • Vent Installation (Indoor Installation or Outdoor Shelter) - Vertical Venting

    19

• Outdoor Installation / Heater Clearances

  21

• Indoor Venting-General Requirements Heater Clearances / Indoor Installation . Outdoor Shelder

  22

  • Horizontal Venting - Using Single-Wall Stainless Gas Vent

    See Also

    How to diagnose and fix a Pentair Mastertemp Swimming Pool Heater - Pool Service, Cleaning, and Repair | St. George, Ut | Splash DoctorPentair Mastertemp 250 Troubleshooting: Quick FixesPentair Pool Heater Troubleshooting GuidePentair MasterTemp 400 Common Problems [15 Easy Fixes] - HeaterFixLab

    27

  • Connecting Single-Wall Stainless Steel Vent to the Heater

    28

  • Horizontal or Vertical Venting Flexible Duct (Flex-Vent)

    29

• Combustion Air Supply / Corrosive Vapors and Possible Causes

  30

• Direct Air Intake Duct with 3-Inch PVC Pipe (Indoor Installation)

  31

• Control Panel Indexing

  31

• Final Installation Check

  31

• Electrical Connections

  32

• Heater Bonding

  33

• Remote Control Connections (Fireman's Switch Connection)

  34

• Connecting the Mastertemp Heater to the Intellicenter Control System Load Center Via RS-485

  35

• Mastertemp Heater Wiring Diagram

  38

• Mastertemp Heater Electrical Schematic Ladder Diagram

  39

40

40

• Basic System Operation / START-UP OPERATION - HSI (Hot-Surface Ignition) Lighting/Operation

  40

• Operating Instructions

  41

• To Turn off Gas to Appliance

  41

• Safety Controls (Air Flow Switch / Water Pressure Switch / Hight Limits / Operation of Ignitiion Module)

  42

• Control Panel / Menu Navigation / Operating the Heater

  44

• Menu

  45

46

• Initial Troubleshooting / Error and Fault Codes

  47

• Troubleshooting Flow Charts

  48

  • Heater will Not Fire Troubleshooting (A, B)

    49

• IGN Is on ALARMS: AGS, AFS, HLS, PS, E01 or 126 / SFS

  51

• Burner / Heat Exchanger Troubleshooting

  54

55

• Care and Maintenance

  55

• Checking the Gas Control Valve

  55

• Liming the Heater - Pressure Relief Valve

  56

• Water Pipe Escutcheon Installation

  57

• After Start-Up

  58

• Spring, Fall (Autumn) and Winter Operation

  58

• Maintaining Pool Temperature / Energy Saving Tips

  59

• Chemical Balance

  60

61

• Replacement Parts

  62

General Specifications

2

Table of Contents

3

Technical Data / Heater Identification Information (HIN)

4

Code Requirements / References

5

6

9

• Overview / Important Notices / Warranty Information

  9

• Operating the Control Panel

  10

• Basic System Operation / HSI (Hot-Surface Ignition) Lighting/Operation

  11

• Start-Up and Operation

  11

• Operating Instructions / Basic System Operation

  12

• Operating Instructions

  12

• To Turn off Gas to Appliance

  12

• Safety Controls: Air Flow Switch (AFS) / Water Pressure Switch / Height Limit Devices

  13

  • High Limits

    13

• Operation of Ignition Module

  14

• Temperature Setting / Maximum Temperature Set Point

  14

15

• Heater Description

  15

• Sequence of Operation

  15

• Putting the Heater into Service

  16

• Specifications

  16

• Plumbing Connections

  17

• Valves

  17

• Manual By-Pass

  17

• Water Connections

  18

• Below Pool Installation

  18

• Gas Connections

  19

• Gas Pipe Sizing

  19

• Sediment Trap/Drip Leg

  19

• Testing Gas Leaks and Gas Pressure

  20

• Gas Pressure Requirements

  20

• Outdoor Installation / Heater Clearances

  21

• Indoor Venting-General Requirements Heater Clearances / Outside Vent Removal )

  23

  • Combustion Air Supply / Corrosive Vapors and Possible Causes

    24

  • Vent Installation (Indoor Installation or Outdoor Shelter) - Vertical Venting

    24

  • Vertical Venting

    25

  • Horizontal or Vertical Venting - Using Single-Wall Stainless Gas Vent

    27

  • Connecting Single-Wall Stainless Steel Vent to the Heater

    28

  • Horizontal or Vertical Venting Flexible Duct (Flex-Vent)

    30

• Corrosive Vapors and Possible Causes

  31

• Control Panel Indexing

  31

• Final Installation Check

  31

• Electrical Connections

  32

• Fireman's Switch Connection/Remote Control Connections

  33

• Mastertemp Wiring Diagram / Electrical Schematic Ladder Diagram

  34

• Initial Troubleshooting and Troubleshooting Chart

  36

37

• Heater will Not Fire Troubleshooting (A, B, C, D)

  37

• Troubleshooting

  38

• LED Diagnostics (AGS, AFS, HLS, PS Thermistor)

  41

• Burner / Heat Exchanger Troubleshooting

  43

44

• Care and Maintenance

  44

• Pressure Relief Valve

  44

• After Start-Up

  45

• Spring, Fall (Autumn) and Winter Operation

  45

• Maintaining Pool Temperature / Energy Saving Tips

  46

• Chemical Balance

  46

• Chemical Balance

  47

• Replacement Parts

  48

  • Replacement Parts

    52

  • Save These Instructions

    54