Table of Contents
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0063
Read these instructions thoroughly before
commencing installation.
1.0 Introduction
1.1 Basic Information
1.2 Warranty
2.0 Technical Data
2.1 Specifications
2.2 Burner Injector Size and Pressure
2.3 Dimensions
3.0 General Requirements
3.1 Related Documents
3.2 Heater Locations
3.3 Flue System
3.4 Air Supply
3.5 Gas Supply
3.6 Air Distribution System
3.7 Electrical Supply
4.0 Installation
4.1 Uncrating and Preparation
4.2 Suspending the Heater
4.3 Fitting the Flue System
4.4 Gas Connection
WARNING: Improper installation, adjustment,
alteration, service or maintenance can cause
injury or property damage. All work must be
carried out by competent persons, i.e. a
registered CORGI installer.
PLEASE READ THESE INSTRUCTIONS
THOROUGHLY BEFORE COMMENCING
WORK.
1.0 INTRODUCTION
1.1 Basic Information
The instructions in this manual apply to Model UF Series 2 gas-fired
natural draught air heaters. Model UF heaters have an axial fan for air
delivery.
These heaters are designed for overhead suspension and are suitable
for indoor installation only.
A permanent electricity supply of 230 volts, 50 Hz, single phase is
required for all UF Models.
Models UF heaters are Appliance Type B
contained warm air units supplied ready for installation on site.
They are fitted with a permanent pilot. A thermoelectric flame su-
pervision device monitors the pilot flame to prevent an explosive
condition occurring.
When the external controls call for heat, the multifunctional control
valve opens, the main burner ignites and supplies heat to the heat
exchanger. After approximately 45 seconds the air delivery fan will
start to run and supply warm air.
When the required room temperature is reached, the main burner will
shut down leaving the fan running to cool down the heat exchanger.
When cool enough, the fan thermostat will turn off the fan.
Table of Contents
4.5 Electrical Connections
4.6 Control Panel Siting
5.0 Air Distribution System
5.1 Horizontal Louvres and Outlet Nozzle
5.1.1 Instructions to Fit Outlet Nozzle
5.2 Vertical Louvres (Option)
5.3 Downturn Air Nozzles (Option)
6.0 Commissioning and Testing
6.1 Electrical Check
6.2 Gas Connection
6.3 Suspension
6.4 Lighting the Heater
6.5 Heater Pipework
6.6 Adjustments - Main Burner and Pilot
6.7 Draught Diverter
6.8 Air Distribution System
6.9 Heater Controls
6.10 Handing Over
7.0 Servicing Instructions
7.1 Procedure
1.2 Warranty
Warranty is void if. . .
a. Model UF heater is installed in atmospheres containing flam-
, Category I
, self-
11
2H3P
b. The installation is not in accordance with these instructions.
c. Model UF, axial fan-type unit heater , is connected to a duct
d. Fitted in the printing industry where fine starch or sugar
Model UF Series 2
Gas-Fired Unit Heaters
Installation Form WA/004/0399
Installation, Commissioning, and Service
APPLIES TO:
8.0 Removal and Replacement of Parts
8.1 Main Burner
8.2 Thermocouple
8.3 Pilot Burner Injector
8.4 Pilot Burner Assembly
8.5 Main Burner Injectors
8.6 Fan Motor/Blade
8.7 Multifunctional Control Valve
8.8 Limit Control
8.9 Fan Temperature Control
9.0 Circuit Diagrams
10.0 Fault Finding Charts
11.0 Short List of Parts
12.0 Exploded Diagrams
12.1 Cabinet Parts
12.2 Heat Exchanger/Burner
13.0 Supplementary Information
HAZARD INTENSITY LEVELS
1. DANGER: Failure to comply will result in severe
personal injury or death and/or property damage.
2. WARNING: Failure to comply could result in severe
personal injury or death and/or property damage.
3. CAUTION: Failure to comply could result in minor
personal injury and/or property damage.
WARNING: The electrical isolator should only
be used in an emergency and should not be used
for closing down the main burner, as it switches
off the fan prematurely and may damage the heat
exchanger, invalidating the warranty.
mable vapours or atmospheres containing chlorinated or ha-
logenated hydrocarbons or atmospheres containing any sili-
cone, aluminum oxide, etc. that adheres to spark ignition fame
sensing probes.
system or fitted with a non-factory authorised air distribu-
tion device.
dusts are used.
AMBI-RAD
Mfg No. 135847, Page 1
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Table of Contents
Related Manuals for Ambi-Rad UF25-2
Summary of Contents for Ambi-Rad UF25-2
- Page 1 AMBI-RAD Model UF Series 2 Gas-Fired Unit Heaters 0063 Installation Form WA/004/0399 Read these instructions thoroughly before commencing installation. Installation, Commissioning, and Service APPLIES TO: Table of Contents 1.0 Introduction 4.5 Electrical Connections 8.0 Removal and Replacement of Parts 1.1 Basic Information 4.6 Control Panel Siting...
-
Page 2: Technical Data
Heat O utput Air Volume Running Power Fuse ft3/min Amps ! ! ! ! Consumption " " " " BTUH BTUH m3/h ft3/h m3/h S ize UF25-2 25,000 20,000 0.69 24.3 0.45 100 watts 1 Amp 14.6 50,000 11.7 40,000 1.38 48.5... -
Page 3: Dimensions
2.3 DIMENSIONS - Model UF Series 2 Figure 2 Table 3 Model E (Hanger) UF25-2 UF50-2 UF75-2 UF100-2 UF125-2 UF165-2 UF200-2 UF250-2 UF300-2 UF400-2 Model H (Inter nal) Approx. Net W t BSP in c h es UF2 5 -2... -
Page 4: General Requirements
Units should always be arranged to blow toward or along exposed 3.0 GENERAL REQUIREMENTS wall surfaces, if possible. Where two or more units are installed in 3.1 Related Documents the same room, a general scheme of air circulation should be main- tained for best results. -
Page 5: Installation
The natural gas meter and service must be checked by the gas sup- AMBI-RAD within 48 hours. plier. Check the data plate for the gas specifications and electrical charac-... -
Page 6: Suspending The Heater
240 volts. Do not attempt to control more than one heater from a thermostat unless a properly from turning. Do not wired relay is fitted. An Ambi-Rad multi-heater panel is available to use an oversized nut control up to four heaters. -
Page 7: Commissioning And Testing
The commissioning and testing should only be carried out by a com- Regulating petent person. This section should be read completely and fully Flow Screw understood. A commissioning service is available from AMBI-RAD. 6.1 Electrical Check After completion of the installation and before switching on the Outlet Pressure... -
Page 8: Gas Connection
6.4 Lighting the Heater (cont'd) 6.5 Heater Pipework The soundness of the heater’s pipework has been checked at the 6.4.1 Prepare to Light the Pilot (cont'd) factory. However, during shipment or installation, connections may Figure 7B - Size UF400 Multifunctional Control Valve have loosened. -
Page 9: Servicing Instructions
7.0 SERVICING INSTRUCTIONS WARNING: Only competent and qualified engineers should carryout servicing and fault finding on this equipment. Complete after-sale service is available from AMBI-RAD. Before maintenance is carried out, ensure that both gas and electrical supplies are turned off and the appliance is cold. -
Page 10: Removal And Replacement Of Parts
1/1/96. A full spares service is provided by AMBI-RAD. Only a competent and qualified engineer should carry out servicing on this equipment. Before maintenance is carried... -
Page 11: Procedure
Heaters supplied after 1/1/96 must use certificated spares to Space the fan blade on the shaft as shown in Figure 17. comply with legislation. A complete spares service is available Figure 17 - Correct Spacing of the Fan Blade on the from AMBI-RAD. Motor Shaft Motor 8.2 Thermocouple 1. - Page 12 8.0 REMOVAL AND REPLACEMENT OF PARTS (cont'd) 1. Remove the outer side panel (left when facing the rear of the 8.8 Limit Control Switch (Overheat heater). Thermostat) 2. Remove the limit switch and replace with a replacement switch eater is fitted with two temperature-activated limit con- This h listed above.
- Page 13 1. Remove the outer side panel (left when facing the rear of the heater). 2. Remove the small access plate on the inner side panel. 3. Remove the retaining bush holding the two limit wires 4. Disconnect the limit wires from the gas valve and feed wires through.
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Page 14: Circuit Diagrams
9.0 CIRCUIT DIAGRAMS 9.1 Remote Diagram - Model UF Series 2 NOTE: Where an Ambi-Rad panel is used, consult the wiring diagram supplied with the panel. 9.2 Circuit Diagram - Model UF Series 2 Form WA004, Page 14... -
Page 15: Fault Finding Charts
10.0 FAULT FINDING CHARTS WARNING: Fault finding should only be carried out by a competent service engineer. 10.1 Main Fault Finding Chart Is the thermostat above room temperature and if used, is the time clock "ON"? Set the thermostat above room Is the pilot temperature and if used, alight? - Page 16 10.0 FAULT FINDING CHARTS (cont'd) 10.2 Pilot Does Not Remain Alight Is the gas Correct the supply pressure 20 gas supply mbar? pressure. Adjust pilot flame. Refer to Refer to Figure 6.7.2 and/or check pilot 10. Does the pilot flame injector for dirt.
- Page 17 10.3 Limit Control Fault Finding Chart (Limit Control Trips) NOTE: Interruption of the main electrical supply to the heater when the heater is in operation may cause the limit control to trip. Check that the supply to the heater is not UF MODELS being interrupted incorrectly by Is the fan guard and/or...
- Page 18 10.0 FAULT FINDING CHARTS (cont'd) 10.4 Fan Fault Finding Chart 10.4.1 Fan Fails to Operate Adjust thermostat temperature setting above ambient to energise the fan and gas solenoid valve. Place the system Does the fan in normal operate? operation. Is there 220 - Replace fan 250 volts at Terminals motor.
- Page 19 10.5 No Main Burner Gas Flow Fault Finding Chart (220/250 volts at multifunctional control valve.) Is the Is the main Rotate to pilot burner gas burner knob "ON" position. alight? "ON"? Does the Relight the pilot heater have a Replace the burner.
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Page 20: Short List Of Parts
11.0 SHORT LIST OF PARTS A "replacement parts tag" listing the most common replacement parts is affixed to the rear of the heater. Each tag is "custom made" for that particular size and style of heater. See Figure 22 for an example of a Replacement Parts Tag. The list below includes only controls used on currently manufactured Model UF-2 heaters. -
Page 21: Exploded Diagrams
12.0 EXPLODED DIAGRAMS 12.1 Cabinet Parts - Model UF Series 2 **NOTE: Beginning 3/97, Model UF-2 heaters have two limit controls. The re- placement part numbers for these limit con- trols are listed as Items 26 and 27 below. Refer to Figure 19 on page 12 for the loca- tion of these controls. -
Page 22: Heat Exchanger/Burner
12.0 EXPLODED DIAGRAMS (cont'd) 12.2 Heat Exchanger/Burner Rack - Model UF Series 2 13E-H Form WA004, Page 22... -
Page 23: Supplementary Information
Item Description 25-2 50-2 75-2 100-2 125-2 165-2 200-2 250-2 300-2 400-2 Flue Baffle Assembly 133533 133534 133535 133536 133537 133538 133539 133540 133541 133542 Heat Exchanger Subassembly - Aluminized 174081 174082 174083 174084 174085 174086 174087 174088 174089 174090 Heat Exchanger Subassembly - Stainless 174091 174092 174093... - Page 24 Sales & Service by: Ambi-Rad Limited, Fens Pool Avenue, Wallows Industrial Estate, Brierley Hill, West Midlands DY5 1QA Telephone: 01384 489 700 Fax: 01384 489 707 © 2000 Thomas & Betts Corporation, All rights reserved. Form WA004, Page 24 0600 500 YL8997...
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