Jandy Pool Heater LRZ Manual

The Jandy Pool Heater LRZ is a high-efficiency pool heating system designed for residential swimming pools. This manual covers installation, operation, maintenance, and troubleshooting for the LRZ series. The heater features digital controls, multiple safety systems, compatibility with various pool sizes, and energy-efficient operation. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation Requirements 3. First-Time Setup 4. Technical Specifications 5. Controls and Operation 6. Maintenance Procedures 7. Winterization 8. Safety Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Digital control panel, Heat exchanger, Burner assembly, Water flow sensor, Pressure switch, Temperature sensors, Vent system.

Feature	Description
Digital Control Panel	LCD display with temperature settings and status indicators
Heat Exchanger	Copper-nickel construction for corrosion resistance
Burner Assembly	Stainless steel construction with electronic ignition
Water Flow Sensor	Monitors water circulation for safe operation
Pressure Switch	Ensures proper water pressure for operation
Temperature Sensors	Multiple sensors for accurate temperature control
Vent System	Direct vent or power vent options available
Safety Lock	Prevents unauthorized temperature changes
Freeze Protection	Automatic operation in freezing conditions
Energy Efficiency	High thermal efficiency rating

Installation Requirements

Professional installation recommended. Ensure proper clearances and ventilation.

Location: Install on non-combustible surface with proper clearances (see specifications).
Gas Connection: Use approved gas piping; check for leaks with soap solution.
Water Connections: Install with proper unions and valves for service access.
Electrical: Connect to proper power source; install disconnect switch within sight.
Venting: Follow venting requirements for proper combustion and exhaust.

WARNING! Installation must comply with local codes. Gas work must be performed by qualified technician.

First-Time Setup

Complete installation checks before initial startup.

Water System: Fill pool and purge air from system; verify proper flow.
Gas System: Verify gas pressure and check for leaks.
Electrical: Verify proper voltage and grounding.
Initial Startup: Follow lighting instructions on control panel.
Temperature Setting: Set desired pool temperature using control panel.

CAUTION! Do not operate without proper water flow. Ensure all safety systems are functional.

Technical Specifications

Heater Type: Natural Gas or Propane
BTU Output: 125,000 to 400,000 BTU (model dependent)
Efficiency: Up to 85% thermal efficiency
Water Connections: 2-inch PVC recommended
Gas Connection: 3/4-inch to 1-1/4-inch NPT
Electrical: 120V AC, 60Hz
Operating Pressure: 10-50 PSI water pressure
Temperature Range: 65°F to 104°F
Dimensions: Varies by model (check specific model label)
Weight: 95-150 lbs depending on model

Controls and Operation

Digital control panel with LCD display and membrane buttons.

Control Panel: POWER, TEMPERATURE UP/DOWN, POOL/SPA mode, MENU, ENTER.

Basic Operation: Press POWER to turn on; set temperature with UP/DOWN buttons. Advanced Settings: Access menu for time clock, freeze protection, service codes. Temperature Control: Set desired pool temperature; heater maintains automatically. Mode Selection: Switch between POOL and SPA modes if equipped.

Maintenance Procedures

Regular maintenance ensures optimal performance and longevity.

Monthly: Check for proper water flow and clear debris from area.
Seasonal: Inspect burner, heat exchanger, and venting system.
Annual: Professional service recommended for thorough inspection.
Water Chemistry: Maintain proper pH (7.2-7.8) and sanitizer levels.

Tip: Keep area around heater clear of combustible materials.

Winterization

Proper winterization prevents freeze damage in cold climates.

Turn off power at disconnect switch.
Close gas supply valve.
Drain water from heater using drain plugs.
Blow out water lines with compressed air.
Cover heater with weatherproof cover.

WARNING! Failure to properly winterize may cause severe damage from freezing.

Safety Features

Multiple safety systems protect against hazardous conditions.

Safety Feature	Function
Water Flow Sensor	Prevents operation without adequate water flow
High Limit Switch	Shuts off heater if temperature exceeds safe limits
Pressure Switch	Ensures proper water pressure for operation
Flame Rollout Switch	Detects improper burner operation
Air Pressure Switch	Verifies proper vent operation
Freeze Protection	Automatic operation when temperatures near freezing

Care & Cleaning

Regular cleaning maintains appearance and performance.

Exterior: Wipe with damp cloth; mild detergent if needed. Ventilation: Keep vent terminals clear of debris. Internal Components: Professional cleaning only. Area: Keep clear of leaves, grass, and combustible materials.

CAUTION! Do not use high-pressure water or harsh chemicals. Disconnect power before cleaning.

Regulatory Information

UL listed and certified to ANSI standards. Complies with NSF/ANSI 50. Manufactured to meet industry safety standards. For technical support, contact Jandy Technical Support at 1-800-227-1442 or visit www.jandy.com. Copyright © 2025 Jandy. All rights reserved.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Heater won't start	Power, gas supply, water flow	Check power source; verify gas valve open; ensure proper water flow.
Error codes displayed	Sensor faults, safety trips	Note error code; consult service manual; reset if applicable.
Insufficient heating	Gas pressure, dirty filter	Check gas pressure; clean pool filter; verify proper sizing.
Heater cycles on/off	Water flow, high limit	Check for restricted flow; clean filter; verify proper venting.
Unusual noises	Scale buildup, water flow	Inspect heat exchanger; check for proper water pressure.

Reset: Turn power off for 30 seconds then restart.

Service: 1-800-227-1442; www.jandy.com