COMBAT CUHA - User Manual

SUITABLE FOR: GB, IE, IT & ES
UNIT HEATERS
Installation, Commissioning,
Service & User Instructions
Models
CUHA, CUHB, CUHC & CUHD
60 to 240 (Manual Ignition)
CUHA/A, CUHB/A, CUHC/A & CUHD/A
60 to 380 (Automatic Ignition)
October 1999
Part No. X404C
Price £5.00

Summary

Section 2. Technical Data

Table 2.1 General Technical Data - All Models

Provides comprehensive technical specifications for all heater models.

Table 2.2 Technical Data Manual Ignition Range

Details technical specifications for manual ignition models.

Table 2.3 Technical Data Automatic Ignition Range

Details technical specifications for automatic ignition models.

Section 2.6 Automatic Ignition - Burner Control Box

2.6.3 Fault Conditions

Explains lockout conditions and manual reset procedures.

Section 3. HEATER INSTALLATION

3.1 Required Standards

Lists relevant regulations and standards for heater installation.

Section 3.3 Gas Supply

Section 3.4 Flue

Section 3.8 Electrical Supply

Section 4. COMMISSIONING THE HEATER - ALL TYPES

4.1 Pre Commission Checks

Checks to be performed before lighting the unit heater.

4.1.1 Electrical Checks

Covers earth continuity and polarity tests for safe electrical installation.

Section 4.2 Gas Supply

Section 4.3 Mechanical checks

Section 4.4 Automatic Ignition Unit Heaters

4.4.1 Carry Out a Dry Run

Initial test of automatic controls without main gas supply.

4.4.2 Commissioning the Gas Valves - Natural Gas

Setting burner pressure and step opening for natural gas.

4.4.3 Commissioning the Gas Valves - L.P.G

Setting inlet pressure for LPG gas valves.

Section 4.5 Manual Ignition Unit Heaters

4.5.2 Commissioning the Gas Valves - L.P.G.

Setting inlet pressure for LPG gas valves on manual ignition units.

Section 4.6 Commissioning Tests - All Heater Types

Section 4.7 Combustion Testing - All Heater Types

Section 4.8 Pilot Drop-Out Test - Manual Ignition Models

Section 5. WIRING DIAGRAMS

Fig 5.1 Wiring for CUHA Manual Ignition Range

Electrical wiring diagram for CUHA manual ignition heaters.

Fig 5.2 Wiring for CUHB & CUHC models 60 to 160

Wiring diagram for CUHB & CUHC models 60 to 160.

Fig 5.3 Wiring for CUHB & CUHC models 180 to 300

Wiring diagram for CUHB & CUHC models 180 to 300.

Fig 5.5 Wiring to CUHD Manual Ignition Range (All models)

Fig 5.6 Wiring Diagram for CUHA;A Range of Heaters Models 60 to 240

Fig 5.7 Wiring Diagram for CUHA;A Range of Heaters Models 280 to 380

Fig 5.8 Wiring For CUHB;A & CUHC;A Models 60 to 160

Fig 5.9 Wiring For CUHB;A & CUHC;A Models 180 to 300

Fig 5.10 Wiring For CUHB;A & CUHC;A Models 340 to 380

Fig 5.11 Wiring of CUHD;A Range - Automatic Ignition - All Models

Section 6. SERVICING INSTRUCTIONS

6.1 Burner Maintenance

Procedures for burner cleaning, inspection, and maintenance.

Section 6.2 Fan;Motor Assembly all Models

6.2.1 For CUHB & CUHC Centrifugal Fan Models

Section 6.4 Gas Control Valves

Pilot Drop Out Test - Manual Ignition Models

Section 7. REMOVAL AND REPLACEMENT OF PARTS

7.1 Burner Tray

Instructions for removing and replacing the burner tray assembly.

Section 7.2 Main Burner Bars;injectors

Section 7.4 Gas Control Valves

7.4.2 Removal of Gas Valves - Automatic Ignition

7.4.3 Removal of gas Valves - Manual Ignition

Section 8. FAULT FINDING

8.1 General for Automatic Ignition

General fault finding procedures for automatic ignition burner systems.

8.1.1 General - Manual Ignition

General fault finding procedures for manual ignition burner systems.

8.2 Fault Finding For Automatic Ignition Burner Systems

Detailed troubleshooting flowchart for automatic ignition burner systems.

Section 8.3 Flame Supervision System

8.3.1 Automatic Ignition Systems

8.3.2 Flame Supervision Systems - Manual Ignition

Section 8.4 Fault Finding for Solenoid Valves

Section 8.5 Fault Finding for Main Fan

Section 9. USER INSTRUCTIONS

9.1 Heater Operation

Basic operation instructions for automatic and manual ignition heaters.

Section 9.4 Lighting Instructions for Automatic Ignition Heaters

9.4.1

Ensuring supplies and settings for automatic ignition heater startup.

9.4.2

Operating remote controls for automatic ignition heater sequence.

9.4.3

9.4.4

Section 9.6 Lighting Instructions for Manual Ignition Heaters

9.6.1

Ensuring supplies and controls for manual ignition heater startup.

9.6.2

9.6.3

Section 9.7 Simple Fault Finding - General

9.7.1 Simple Fault Finding - Automatic Ignition Heaters

Troubleshooting common faults in automatic ignition heaters.

9.7.2 Simple Fault Finding - Manual Ignition Heaters

Troubleshooting common faults in manual ignition heaters.

Section 9.8 Service Requirements

Section 10. Conversion Between Gasses

10.2 Burner Conversion

Section 10.3 Gas Valves - Automatic Ignition

10.3.2 Nova Range Valves

10.3.3 Conversion of Johnson Valve to L.P.G

COMBAT CUHA Specifications

General

Brand	COMBAT
Model	CUHA
Category	Heater
Language	English