Jandy Legacy Heater 400,000 BTU NG Elec Ign Cupro Nickel - LRZ400ENN


Model # LRZ400ENN

By Jandy



Model # LRZ400ENN

Product Description

With 60 years experience as the No. 1 selling brand of pool heaters – Jandy’s new Legacy Heater is designed for today’s discerning market. Available in two models, the Legacy LRZE (electronic ignition) heater features a technologically-advanced dual-thermostat control, and the LRZM (millivolt ignition) model features a single control with easy on/off switch.

Whichever model you select, it’s sure to provide years of dependable service. With our industry-leading 24-point quality check system, you can depend on Legacy’s performance and reliability year after year, season after season.


Cupronickel is an alloy of copper that contains nickel and strengthening elements, such as iron and manganese. Cupronickel is highly resistant to corrosion in salt water, because its electrode potential is adjusted to be neutral with regard to salt water. Because of this, it is an ideal choice for swimming pools using salt chlorine generators.

LRZE (Electronic)

  • Digital control of pool and spa set-points
  • Self diagnostics and communication to Jandy AquaLink® RS Systems
  • Polymer headers with CPVC 2/2.5" universal union connections

LRZM (Millivolt)

  • Easy on/off temperature switch control
  • Mechanical thermostat allows users to easily set pool or spa temperatures
  • Polymer headers with CPVC 2/2.5" universal union connections

The Pool Sizing Guide shows the maximum pool surface area our Legacy models will heat based on the temperature difference between the air temperature during the coldest month the pool is used and the desired pool temperature. Figures are based on average wind conditions and average pool depth.

The Spa Sizing Guide details the time required for each model to raise spa temperature by 30°F.

Replacement for Jandy Lite2™ heaters.
*ASME® Certified models available.

Product Specifications

400,000 BTU

?     Asked on 9/30/2014 by Guest

Hi. I am replacing a Teledyne heater for a in ground pool. The heater is indoors and is vented to the outside. I'm looking at the LRZ400EN. I understand this has the electronic ignition and not the mili volt I have now. I will have an electrician wire it. My question is about the venting and if I need a draft hood. I know I need to vent it to the outside. I had hoped to just connect to the venting that's there now. Do I need the draft hoot to be able to attach the venting to the heater?

A     Answered on 9/30/2014 by InyoPools Product Specialist Patrick P.

Yes, I would recommend you sill use the mfg drafthood if you will be using this heater indoors. The correct draft hood for this model is R0499605.If you would like to consult Jandy directly, their  contact # is 800-822-7933

?     Asked on 10/10/2012 by Guest

What is the difference between an Electronic and Millivolt ignition?

A     Answered on 10/10/2012 by InyoPools Product Specialist Patrick P.

The basic answer is that Millivolt is the old style of ignition, using a standing pilot light. While the electronic ignition uses a spark start system like a gas grill. Electronic ignitions are more efficient in gas usage and also are better suited for high wind areas where a pilot light might get extinguished.

?     Asked on 1/16/2012 by Guest

Will a gas heater operate at the low speed of a dual speed motor?

A     Answered on 1/16/2012 by InyoPools Product Specialist Patrick P.

Probably not - Most gas heater will shut off at low GPM levels (20-40) to keep the heater cores from overheating - 20 for 200 BTUs, 40 for 400 BTUs. Depending on your pool system you might get these GPM levels at the low speed but generally these heaters must be run at the motor's high speed.