ETi 400 High Efficiency Pool and Spa Heater Installation and User’s Guide
Rev. A 9/2016
16
HEATER DESCRIPTION
The ETi™ 400 Heater has precisely matched orifice plates to meter the air and gas into the mixer. The blower draws the air
and gas through the mixer and forces it into the burner’s flame holder. A sealed TitanTough™ Heat Exchanger surrounds
the flame holder, discharging exhaust gases out the flue (See Figure 7 & 8).
Use a 2 in fitting to connect to the 2 in PVC
slip unions provided with the heater.
The outer manifold remains cool; no heat sinks are required. The heater operator
control panel is located on the side of the heater.
Section 2: Installation Instructions
Section 2: Installation Instructions
Pentair strongly recommends that all vents, pipes and exhaust systems be initially and periodically tested for proper
operation. This testing can be accomplished by using a hand-held carbon monoxide meter and/or by consult-
ing with a gas professional. Pool and spa heaters must be used in conjunction with carbon monoxide detectors
installed near the pool heater. The carbon monoxide detectors must be periodically inspected for proper operation so
as to insure continued safety. Broken or malfunctioning carbon monoxide detectors must be replaced immediately.
Figure 7. ETI™ 400 Heater (Left Side View)
Figure 8. ETI™ 400 Heater (RIght Side View)
Electrical
and
Bonding
lug
2-in Inlet
Plumbing
Assembly
Upper Blower
Assembly
Lower Blower
Assembly
Upper Heat
Exchanger
Lower Heat
Exchanger
Vent Cap
CPVC Flue
Outlet
Exhaust
Assembly
Inlet Plumbing
Assembly
Tridicator (Water pressure and
Temperature gauges)
High
Limit
Switch
(HLS)
Auto gas
shut-off
switch
(AGS)
Condensate Neutralizer Cartridge
(Optional, P/N 475612 sold separately).
The cartridge may be mounted onto the heater
base for heater outdoor installation.
THIS HEATER MUST BE INSTALLED AND SERVICED BY A PROFESSIONAL SERVICE TECHNICIAN,
QUALIFIED IN POOL HEATER INSTALLATION.
Tubing for
Condensate
Neutralizer
Cartridge
Heater Base (Top View)
To drain
To drain
2-in Outlet
Plumbing
Assembly