ETi 400 High Efficiency Pool and Spa Heater Installation and User’s Guide
Rev. A 9/2016
36
The ETi™ 400 Heater is a condensing appliance. The flue gases will produce condensate while in operation and
must be drained correctly.
Note: The condensate pH level is between 3.1 and 4.2, Pentair recommends to
neutralize the condensate to avoid potential damage over time to the drainage system, and to comply with
local water authorities where applicable.
To neutralize the condensate, use an optional Condensate Neutralizer Kit
P/N 475612 or similar. The condensate drain must be installed so as to prevent accumulation of condensate. When
a condensate pump is not used, the tubing must continuously slope downward toward the drain with no spiraling.
CAUTION! pH levels of 5.0 and below may harm some floor drains and/or pipes, particularly those that are metal.
Ensure that the drain, drainpipe, and anything that will come in contact with the condensate can withstand the acidity.
Damage caused by failure to install a neutralizer kit or to adequately treat condensate will not be the manufacturer’s
responsibility.
CONDENSATION MANAGEMENT
Figure 24a. External Neutralizer Cartridge for indoor heater Installation
To install the external condensate neutralizer cartridge drain/tubing:
1. Connect the PVC socket adaptors to the neutralizer. DO NOT OVERTIGHTEN.
2. Connect the inside tubing to the inlet of the neutralizer cartridge.
3.
Indoor Heater Installation (Fig. 24a):
Mount the neutralizer cartridge on the floor near the side of the heater.
Outdoor Heater Installation (Fig. 24b):
Using the provided brackets, secure the neutralizer cartridge onto the
heater base.
4. Connect the outside tubing to the outlet of the neutralizer cartridge. Be sure the tubing is at its highest point at the
cartridge outlet.
5. Route the outside tubing to a drain or to a pump. Maintain a pitch of ¼ in per foot downward from the cartridge
outlet.
6. Fill the condensate trap with water until flow is established through the neutralizer.
Note: Observe the neutralizer
during the heater operation to ensure unrestricted flow.
Condensate Neutralizer Cartridge Drain/Tubing Installation
(FOR INDOOR OR OUTDOOR HEATER INSTALLATION)
Mounting
brackets
WARNING! DO NOT allow the exhaust flue gases to vent through the neutralizer. All condensate drains MUST have
a trap to prevent flue gas leakage. Flue gas leakage can cause personal injury or death from carbon monoxide. Check
with local authorities for regulations regarding discharge of condensate to the drain sewer system.
Condensate Maintenance
Annual condensate assembly inspection:
Inspect the inside tubing top for any dirt or particles that could collect and clog
the condensate neutralizer cartridge.
DO NOT route the condensate outside tubing through any area that is exposed
to freezing
temperatures.
Section 2: Installation Instructions
Out to drain
Inside
tubing to
internal
exhaust
pipe
Outside tubing
Connect tube to
cartridge inlet
Optional
External
Condensate
Neutralizer Kit
P/N 475612
Figure 24b. Internal Neutralizer Cartridge
installed on base of heater for outdoor
heater Installation
