EasyManua.ls Logo

STA-RITE Stack Flue - User Manual

STA-RITE Stack Flue
2 pages
Save Page as PDF
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Loading...
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
Question and Answer IconNeed help?

Do you have a question about the STA-RITE Stack Flue and is the answer not in the manual?

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.

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.

Overview

  1. Function Description
  2. Important Technical Specifications
  3. Usage Features
  4. Maintenance Features
  5. Servicing Procedure for Replacement
  6. Critical Safety Warning for Installation
  7. General Safety Precautions

This document describes the Stack Flue Sensor (SFS), a critical component in heater systems designed to ensure safe and efficient operation. The SFS is an integral part of the heater's safety and control system, specifically designed to monitor and regulate the temperature of the flue gas output.

Function Description

The primary function of the Stack Flue Sensor is to prevent the flue gas output from exceeding a safe temperature threshold. It acts as a safety device, ensuring that the exhaust gases do not reach temperatures that could pose a risk of fire, explosion, or damage to the heater and its surroundings. Specifically, the SFS prevents the flue gas output from exceeding 500°F ±18°F (260°C ±8°C). This precise temperature control is crucial for maintaining the integrity of the exhaust system and preventing potential hazards associated with overheating.

In older heater models, a similar function was performed by an Indoor Stack Flue Switch or an Outdoor Stack Flue Switch. The SFS is the newer, more advanced component, designed to work with modern control boards for enhanced accuracy and reliability. The control board must be correctly configured to "SF1" for the heater to operate with a Stack Flue Sensor. If the control board is set to "SF0," it indicates compatibility with the older Stack Flue Switches.

Important Technical Specifications

  • Temperature Threshold: Prevents flue gas output from exceeding 500°F ±18°F (260°C ±8°C).
  • Physical Characteristics: The Stack Flue Sensor is described as having a 1/2" hex and 2" leads. This refers to the size of the hexagonal base for installation and the length of the electrical leads for connection to the control board.
  • Location: The SFS is strategically located on the Exhaust Elbow of the heater, which is the optimal position for accurately monitoring the flue gas temperature as it exits the combustion chamber.
  • Part Number: The repair parts list specifies the Stack Flue Sensor with Part No. 42002-0024S.

Usage Features

The Stack Flue Sensor is designed for seamless integration into the heater's control system. When installed, it continuously monitors the flue gas temperature and communicates this data to the heater's control board. If the temperature exceeds the specified limit, the control board will take appropriate action, such as shutting down the heater, to prevent overheating.

For proper operation, the heater's control board must be correctly configured. If a Stack Flue Sensor is installed, the control board needs to be set to "SF1." The document provides a detailed procedure for setting the control board:

  1. Turn the power to the heater ON.
  2. Press and hold the OFF button on the membrane pad until the 3-digit display shows “Ado” or “Ad1” (approximately 10 seconds).
  3. Release the button and then press it momentarily. The 3-digit display will now show either “SF0” or “SF1”.
  4. If the display reads "SF1," it is correctly set. If it reads "SF0," use the arrow buttons on the membrane pad to set it to "SF1."
  5. Momentarily press the "OFF" button to exit the program.

This configuration process ensures that the control board correctly interprets the signals from the SFS and operates the heater safely.

Maintenance Features

The document provides clear instructions for replacing the Stack Flue Sensor, emphasizing safety precautions throughout the process.

Servicing Procedure for Replacement:

  1. Safety First: Turn off the filter pump and all electrical power to the heater. This is a crucial step to prevent electrical shock and ensure safety during maintenance.
  2. Cool-Down Period: Allow the heater to cool for at least half an hour before proceeding. This prevents burn hazards, as the heater components, including the SFS and combustion chamber collar, can remain extremely hot after operation.
  3. Access: Unbolt and remove the Upper Left and Upper Right Jackets from the heater to gain access to the SFS.
  4. Disconnection: Disconnect the wires from the old Indoor Stack Flue Switch or Sensor.
  5. Removal: Remove the old Switch or Sensor by turning it counter-clockwise with a 1/2" open-end wrench.
  6. Installation: Reverse Steps 1 through 5 to install the new SFS.

Critical Safety Warning for Installation:

A critical warning is highlighted regarding the installation of the new Stack Flue Sensor: "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." This step is essential to prevent flue gas leaks, which could lead to carbon monoxide poisoning, a serious health hazard. The RTV sealant ensures an airtight seal, maintaining the integrity of the exhaust system.

General Safety Precautions:

  • Qualified Personnel: Heater service and repair must be performed by a qualified installer, service agency, or the gas supplier. This ensures that maintenance is carried out by individuals with the necessary expertise and tools, minimizing risks.
  • Burn Hazard: Always allow the heater to cool for at least half an hour before touching the Stack Flue Switch or the Combustion Chamber Collar to prevent burns.

In summary, the Stack Flue Sensor is a vital safety and control component in modern heaters, designed to prevent overheating of flue gases. Its precise temperature monitoring, specific installation requirements, and detailed servicing procedures underscore its importance in ensuring the safe and efficient operation of the heating system. Adherence to the provided instructions and safety warnings is paramount for both the longevity of the device and the safety of the user.

STA-RITE Stack Flue Specifications

General IconGeneral
BrandSTA-RITE
ModelStack Flue
CategoryAccessories
LanguageEnglish