Pentair 250, 300

P/N 471593 Rev. C 11-1-01

NOTES

Contents

Main FOR YOUR SAFETY - READ BEFORE OPERATING Warning: For Your Safety MiniMax NT Low NOx Series WARNING POOL & SPA HEATERS OPERATION & INSTALLATION MANUAL WARNING WHAT TO DO IF YOU SMELL GAS Table of Contents MiniMax NT Low NOx Introduction Pool and Spa Heaters IMPORTANT NOTICES CODE REQUIREMENTS Operation SAFETY RULES WARRANTY INFORMATION FOR YOUR SAFETY: READ BEFORE LIGHTING MINIMAX NT LOW NOx HSI ELECTRONIC IGNITION LIGHTING/OPERATION - WARNING OPERATING INSTRUCTIONS TO TURN OFF GAS TO APPLIANCE Installation Instructions Figure 3. INDOOR VENTILATION 27.63 "A" DIM. ELECTRICAL, ALL HSI UNITS N L TWO-WIRE OR THREE-WIRE REMOTE HOOK-UP 2 WIRE REMOTE Rev. C 11-1-01 P/N 471593 Three-wire remote: Figure 8. TWO-WIRE OR THREE-WIRE REMOTE HOOK-UP, (contd.) 3 WIRE REMOTE Installation (Remotes) MiniMax NT Low NOx 400 HSI Electronic Ignition Wiring Diagram IGNITOR HOT SURFACE HI SPEED HI AIR PRES. MiniMax NT Low NOx 250 HSI Electronic Ignition Wiring Diagram (SINGLE VOLTAGE) IGNITOR HOT SURFACE BURNER CODE OR SUPERCEDING LOCAL (WIRING) CODES. F2 F1 MiniMax NT Low NOx (ALL MODELS) HSI Electronic Ignition Wiring Diagram 120 VAC INTERCONNECTING WIRING TO APPLIANCE MUST CONFORM TO THE NATIONAL ELECTRICAL WIRE, 18 GAUGE, 600V, 200 C TEMPERATURE RATING. THERMAL FUSE WIRING MUST BE REPLACED WITH UL OR CSA (IF CANADA) APPROVED PLUMBING CONNECTIONS MANUAL BY-PASS WATER CONNECTIONS Reversible Inlet/Outlet Connection PLUMBING GAS CONNECTIONS GAS LINE INSTALLATIONS REGULATED MANIFOLD PRESSURE TEST MINIMAX NT LOW NOx GAS PRESSURE REQUIREMENTS* INDOOR VENTINGGeneral Requirements INDOOR INSTALLATION (USA ONLY) OUTDOOR SHELTER INSTALLATION (CANADA) See page 17 for (Indoor) Vent Adaptors The heater should be installed at least 5 feet away from the pool or spa. YLPPUSRIADERIUQER ledoM I 002002002 052052052 003003003 004004004 NSTALLATION ON FLOORS CONSTRUCTED OF COMBUSTIBLE MATERIALS INDOOR VENT ADAPTORS (FITS ALL MODELS) Detail H INDOOR INSTALLATIONS MINIMAX NT LOW NOx VENTING GUIDELINES D F G Air Supply G BC VENTILATION OUTDOOR INSTALLATION ONL Y Vent Termination: MINIMAX NT VENTING GUIDELINES This unit shall not be operated outdoors at temperatures below -20o F. for natural gas. GENERAL DESCRIPTION BASIC SYSTEM OPERATION SAFETY CONTROLS AIR PRESSURE (FAN) SWITCH Low Gas Pressure Switch WATER PRESSURE SWITCH LOW GAS PRESSURE SWITCH (LOW NOx Versions Only) SAFETY CONTROLS, (contd.) IGNITION MODULE HIGH LIMITS OPERATION OF IGNITION MODULE HEAT MODE MINIMAX NT LOW NOx PENTAIR TEMPERATURE CONTROLLER 7800 (See Figure 21, for keypad and Pentair Temperature Controller layout details.) (Pentair Temperature Controller 7800 Layout) GENERAL BASIC THERMOSTAT OPERATION ( ) ( ) ( ) ( ) TO CHANGE THE FACTORY TEMPERATURE SETTINGS: TIME SETTING TIME SETTING, (contd.) MAINTENANCE INSTRUCTIONS ENERGY SAVING TIPS SPRING AND FALL OPERATION WINTER OPERATION Maintenance CHEMICAL BALANCE POOL AND SPA WATER WHAT A DISINFECTANT DOES WHAT IS A DISINFECTANT RESIDUAL? NORMAL OPERATION SEQUENCE (Refer to Figure 21 of Pentair Temperature Controller 7800 keyboard) Please Note: LEGEND OF FAULT ICONS AND TYPE OF PROBLEMS FLAGGED Troubleshooting & Service SERVICE CHECKSIGNITION MODULE skcehCecivreS FLAME SENSOR CURRENT CHECK SERVICE CHECKS RED (+) BLACK (-) Troubleshooting - General Rev. C 11-1-01 P/N 471593 MINIMAX NT LOW NOx HEATER - (Single Voltage) Page Rev. C 11-1-01 P/N 471593 MINIMAX NT LOW NOx HEATER - (Dual Voltage) Page Page Page Page MiniMax NT Low NOx Heaters Limited Warranty