STA-RITE Stack Flue User Manual

P/N 42002-0024S
Stack Flue
Sensor (SFS)
3700 0600
Risk of fire, explosion, and electrical shock.
Heater service and repair must be performed by a qualified
installer, service agency, or the gas supplier.
Location
The Indoor Stack Flue Switch (ES2) / Stack Flue Sensor
(SFS) is located on the Exhaust Elbow.
Function
The Stack Flue Sensor prevents the flue gas output from
exceeding 500°F ±18°F (260°C ±8°C).
Servicing Procedure
To replace the Indoor Stack Flue Switch or Stack Flue
Sensor (See Figure 2, Page 2):
1. Turn off the filter pump and all electrical power to the
heater.
2. Allow the heater to cool for at least half an hour before
proceeding.
3. Unbolt and remove the Upper Left and Upper Right
Jackets from the heater.
4. Disconnect the wires from the old Indoor Stack Flue
Switch or Sensor.
5. Remove the old Switch or Sensor by turning it counter-
clockwise with a 1/2” open end wrench.
6. Reverse Steps 1 through 5 above.
Risk of carbon monoxide poisoning. BE SURE
to seal the Stack Flue Sensor with a bead of RTV sealant
before threading it into the exhaust elbow.
Stack Flue Sensor
Sta-Rite Pool/Spa Group
293 Wright Street, Delavan, WI 53115
International: 262-728-5551, FAX: 262-728-7550
www.starite.com
Union City, TN • Delavan, WI • Mississauga, Ont. • Murrieta, CA
© 2004, Sta-Rite Industries Printed in U.S.A. S381 (Rev. 11/16/04)
FIGURE 1

STA-RITE Stack Flue Specifications

General

Brand	STA-RITE
Model	Stack Flue
Category	Accessories
Language	English

Summary

Stack Flue Sensor Overview

Location

Identifies the position of the Indoor Stack Flue Switch (ES2) / Stack Flue Sensor (SFS) on the Exhaust Elbow.

Function

Explains that the Stack Flue Sensor prevents flue gas output from exceeding 500°F ±18°F (260°C ±8°C).

Servicing Procedure

Details the steps for replacing the Indoor Stack Flue Switch or Stack Flue Sensor, including safety precautions.

Control Board Setup for Stack Protection

Control Board Setup

Instructions for setting the Control Board to 'SF1' for operation with a Stack Flue Sensor.

Safety Precautions

Warning regarding burn hazard; advises allowing the heater to cool before touching components.