Honeywell Minipeeper C7035A User Manual

PRODUCT DATA
60-2026-16
Minipeeper
®
Ultraviolet Flame
Detectors
C7027A, C7035A, C7044A, C7927A
APPLICATION
The C7027A, C7035A, C7044A and C7927A Minipeeper
®
Ultraviolet Flame Detectors detect the ultraviolet radiation
emitted by combustion flames. The flame detectors are used
with Honeywell flame safeguard controls to provide flame
supervision for gas, oil, or combination gas-oil burners.
FEATURES
• C7027A, C7035A, and C7044A Flame Detectors are used
with RA890G devices or R7249A, R7290A, R7749B and
R7849A,B Amplifiers and the appropriate Honeywell
controls.
• C7927A is used with only the R7851B Flame Amplifier and
the 7800 SERIES controls.
• C7044A may also be used with the following 50 Hz
Honeywell combustion controls/amplifiers:
— R4341/R7323
— R4343/R7323
— R4344/R7323
• C7027A/C7927A has an integral collar threaded (internal
1/2-14 NPSM) for mounting on a one-half-inch sight pipe.
• C7035A has an integral collar threaded (internal
1-11-1/2 NPSM) for mounting on a one-inch sight pipe.
• C7035A housing meets Underwriters Laboratories Inc.
requirements for rain tightness and complies with NEMA
enclosure standards, types 4 and 4X.
• C7044A mounts with a two screw bracket. The UV sensor
tube is enclosed in a stainless steel housing.
• C7044A has the capability of side or end viewing in flame
monitoring applications.
• Because of its compact size, the C7044A is particularly
suitable for blast tube mounting.
• Properly installed, the C7027A, C7035A and C7927 are
pressure rated for 5 psi.
• C7035A ultraviolet radiation sensor tube is field
replaceable.
• Two C7027A, C7035A or C7044A Flame Detectors can be
wired in parallel for difficult flame sighting installations.
(C7927cannot be used in parallel.)
• C7927A1016, C7027A1049, C7027A1064, C7027A1072
come with 1/2-in. spud connection for electrical wiring.
• C7927 is immune to x-ray testing.
C7027A
C7035A
C7044A
C7927A
M33825
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Specifications ................................................................... 2
Ordering Information ........................................................ 2
Wiring (All Models—Fig. 9) ............................................... 8
Adjustments and Checkout ............................................... 9
Troubleshooting ................................................................ 12
Maintenance ..................................................................... 12

Honeywell Minipeeper C7035A Specifications

General

Brand	Honeywell
Model	Minipeeper C7035A
Category	Security Sensors
Language	English

Summary

Application

Features

C7027A, C7035A, and C7044A Flame Detectors

Used with RA890G devices or R7249A, R7290A, R7749B and R7849A,B Amplifiers and controls.

C7927A Flame Detectors

Used with R7851B Flame Amplifier and the 7800 SERIES controls.

Specifications

C7027A Minipeeper® Ultraviolet Flame Detector

Ambient operating temp, pressure, mounting, wiring, dimensions, and notes.

Ordering Information

Contacting Honeywell for purchasing and product information.

C7035A Minipeeper® Ultraviolet Flame Detector

C7044A Minipeeper® Ultraviolet Flame Detector

C7927A Minipeeper® Ultraviolet Flame Detector

Installation

When Installing This Product

General instructions and safety precautions before installation.

Important Notes on Detector Lifespan

Notes on detector lifespan and burner cycling requirements.

Warning: Explosion and Electrical Shock Hazard

Basic Requirements For Ultraviolet Detector Installations

Key factors for UV detector installation, line-of-sight, and flame sighting.

Other Radiation Sources Sensed By The UV Detector

Ultraviolet Sources

Lists various UV sources like refractory, spark, welding arcs, and lamps.

Gamma Ray and X-ray Sources

Lists sources like diffraction analyzers, electron microscopes, and radioisotopes.

Mounting a C7027A, C7927 or C7035A

Locate the Sight Pipe

Guidance on selecting and preparing the sight pipe for installation.

Prepare Hole In Wall Of Combustion Chamber

Instructions for cutting and flaring the hole for the sight pipe.

Mounting The Sight Pipe

Steps for threading, cutting, and positioning the sight pipe.

Sight Pipe Ventilation

Methods for ventilating the sight pipe for cooling or clearing.

Swivel Mount

Mount The Detector

Using a Heat Block With a C7027 or C7927

Mounting a C7044A On a Blast Tube

Warning: Explosion Hazard

Safety warning regarding locating the C7044 in atmospheres with fuel vapors.

Wiring (All Models)

Caution: Equipment Damage Hazard

Warning about incorrect wiring polarity causing improper supervision.

Notice: Industry Standards

Requirement for conduit seals for flammable gas/liquid flow protection.

Important: Wiring Compliance

Emphasizes compliance with local codes and NEC Class 1 wiring.

Adjustments and Checkout

UV Sensor Tube Test

Procedure to test the UV sensor tube for proper operation.

Adjust Detector Sighting Position

How to adjust detector position for optimum flame signal.

Measuring Flame Signal

Pilot Turndown Test

Procedure to test pilot flame proving before main fuel valve opens.

Table 1. Flame Signal

Ignition Spark Response Test

Response to Other Ultraviolet Sources

Weld The Sight Pipe (or Tighten the C7044A Clamp Screw)

Final Checkout

Troubleshooting

Warning: Electrical Shock Hazard

Caution regarding line voltage presence during troubleshooting.

Inadequate Flame Signal

Steps to diagnose and resolve issues with obtaining a flame signal.

Maintenance

Periodic Maintenance

Guidance on cleaning and replacing components for optimal performance.

Cleaning the C7044A Detector

Specific procedure for cleaning the C7044A detector.