Page 3 - TABLE OF CONTENTS; Low Voltage Thermostat with; SECTION 16: ROBERTS GORDON
© 200 8 Ro b erts-Gordon LLC All rights reser v ed. N o part of this w ork co v ered b y the copyrights herein may b e reprod u ced or copied in any form or b y any means - graphic, electronic, or mechanical, incl u ding photocopying, recording, taping or information storage and retrie v al systems ...
Page 5 - TABLE OF FIGURES; Figure 11: Standard Vented Heater - Common
TABLE OF FIGURES Figure 1: UHA 30 - 45 Label Placement ................................... 2Figure 2: UHA 60 - 75 Label Placement ................................... 3Figure 3: UHA 100 - 125 Label Placement................................ 4Figure 4: Installation Clearances and Clearances to Combusti...
Page 7 - SECTION 1: HEATER SAFETY; independent distributor to
SECTION 1: H EATER S AFETY 1 SECTION 1: HEATER SAFETY Your Safety is Important to Us!This symbol is used throughout the manual to notify you of possible fire, electrical or burn hazards. Please pay special attention when reading and following the warnings in these sections.Installation, service and ...
Page 8 - UHA L; * For separated combustion units only
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 2 Figure 1: UHA 30 - 45 Label Placement Description Part Number Logo Label 91033203 Cut Hazard Label 91010430 Vent Length Label 91039505 Vent to Outdoors Label 91010427 Warning Label 91010429 Rating Plate Label 91010420 In...
Page 11 - SECTION 2: INSTALLER RESPONSIBILITY; * Halogenated Hydrocarbons; National Standards and Applicable Codes
SECTION 1: H EATER S AFETY 5 SECTION 2: INSTALLER RESPONSIBILITY The installer is responsible for the following: • To install the heater, as well as the gas and electrical supplies, in accordance with applicable specifications and codes. Roberts-Gordon recommends the installer contact a Local Buildi...
Page 12 - Manufactured Units; See; Minimum Required Installation Clearances; on Page; WARNING
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 6 SECTION 3: CRITICAL CONSIDERATIONS3.1 Basic Information UHA[X][S] heaters have automatic ignition burners for ON/OFF operation only. 3.2 Manufactured Units Gas-fired, power-vented unit heater with tubular heat exchanger....
Page 13 - See Page 22, Section 8; Electrical Supply; See Page 23, Section 9
SECTION 3: C RITICAL C ONSIDERATIONS 7 3.7 Gas Supply It is important that the gas supply pipe is sized correctly to provide the inlet pressure as stated on the heater data plate. The gas supply pipe and electrical connections must not support any of the heater's weight. See Page 22, Section 8 3.8 E...
Page 14 - SECTION 4: NATIONAL STANDARDS AND APPLICABLE CODES; , local ordinances and any special
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 8 SECTION 4: NATIONAL STANDARDS AND APPLICABLE CODES 4.1 Gas Codes The type of gas appearing on the name plate must be the type of gas used. Installation must comply with national and local codes and requirements of the lo...
Page 16 - Shelf Mounting and Suspension; See Page 11, Figure 5; Crush Hazard
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 10 SECTION 5: MAJOR COMPONENTS 5.1 General Heaters are designed for installation above 6' (1.8 m). These heaters must be installed within the heated space. Duct delivery systems are not permitted with axial fan units. When...
Page 17 - Figure 5: Suspension Methods; qu; Existing cabinet screws must be re-used.
SECTION 5: M AJOR C OMPONENTS 11 Figure 5: Suspension Methods Figure 6: Shelf-Mounting Methods Cone Point Set Pin W indo w Clamp Unistr u t 3/ 8 " ThreadedRod Nu t W asher Ri v Nu t S u pport Points Ens u re all s u spension hard w are is tor qu ed to a minim u m of 20 ft l b s. W asher 3/ 8 ...
Page 18 - Figure 7: Wall Shelf Mounting and Hanging Suspension; Hardware provided to construct mounting bracket assembly only.
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 12 Figure 7: Wall Shelf Mounting and Hanging Suspension Description Part Number Qty. Wall Shelf Mounting Bracket Kit 120110 02K Wall Suspension Mounting Bracket Kit 12011001K 1 Shelf Mounting Bracket Kit 12011000K 1 Descri...
Page 19 - Push in
SECTION 5: M AJOR C OMPONENTS 13 Figure 8: Vertical Louvers (Optional) Push in louver and compress spring to remove (opposite end first) Install vertical louvers brackets(top and bottom)with supplied screws. Install vertical louvers and springs into bracketswith springs at top. Remove horizontal lou...
Page 20 - Changing Vent and Air Intake Orientation; Refer to; Vent Installation; Figure 4
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 14 SECTION 6: VENTING 6.1 Changing Vent and Air Intake Orientation The heater is sold with rear horizontal vent and air intake connections as standard (only separated combustion models have air intake connection). If verti...
Page 21 - For vent termination; Unvented Operation; Combustion by-products contain a; Horizontal Venting; • In the event that the side wall horizontally
SECTION 6: V ENTING 15 Vents and air intakes must be adequately supported so that the heater does not bear the weight of the pipes. For vent termination See Page 17, Figure 9 through Page 20, Figure 14 . 6.3.1 Standard Vented Heaters (Models UHA[X] 30 - 125) The vent must be fitted with a low resist...
Page 22 - • In the event that the requirements of this; Length Requirements; Seal any unused openings in the venting
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 16 • In the event that the requirements of this subdivision can not be met at the time of completion of installation, the owner shall have a period of thirty (30) days to comply with the above requirements; provided, howev...
Page 23 - Follow the lighting instructions. Place the; Figure 9: Vent and Roof Detail; Vertical
SECTION 6: V ENTING 17 are located and other spaces of the building. Turn on clothes dryers and any exhaust fans, such as range hoods and bathroom exhausts so that they shall operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers. 4. Follow the lighting instructions. ...
Page 25 - Figure 13: Concentric Vent Box; bu
SECTION 6: V ENTING 19 Figure 12: Separated Combustion Heater - Vertical and Horizontal Vent Termination Figure 13: Concentric Vent Box V ent Termination Listed Thim b le thro u gh Com bu sti b le W all 4" (10 cm) Diameter V ent 12" (31 cm) Minim u m from w all to v ent termination. 4" (...
Page 26 - NOTE
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 20 Figure 14: Concentric Vertical and Horizontal Vent Termination - Separated Combustion Heater 6" (16 cm) Diameter Single W all 4" (10 cm) Diameter Air Intake Concentric V ent Box Vertical Option 10 ' (3 m) Maxim ...
Page 27 - Unvented Installation; Building Ventilation; If the building has a slight negative
SECTION 7: A IR S UPPLY 21 SECTION 7: AIR SUPPLY7.1 Separated Combustion Installation When installed as a separated combustion heater (UHA[X]S), the air for combustion is drawn in from outside the building. It is important to ensure that there is adequate space around heater to provide air for the a...
Page 28 - SECTION 8: GAS PIPING; le Gas
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 22 SECTION 8: GAS PIPING A gas meter is connected to the service pipe by the gas supply company. An existing meter should be checked, preferably by the company, to ensure that the meter is adequate for the rate of gas supp...
Page 29 - Positioning Thermostats; for wall tag details.; Low Voltage Thermostat with One Heater
SECTION 9: W IRING 23 SECTION 9: WIRING All heater models require constant 120 V/1Ø/ 60 Hz power supply. Check heater rating plate for electrical rating for proper circuit sizing. For servicing, a disconnect switch of proper electrical rating should be installed in the vicinity of the heater.All hea...
Page 30 - Low Voltage Thermostat with Multiple Heaters 30 - 45
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 24 9.3 Low Voltage Thermostat with Multiple Heaters 30 - 45 Model Relay Type Relay Part Number Max. Number of Heaters UHA[X][S] 30 - 45 SPST 90417600 4
Page 31 - Low Voltage Thermostat with Multiple Heaters 60 - 125
SECTION 9: W IRING 25 9.4 Low Voltage Thermostat with Multiple Heaters 60 - 125 Model Relay Type Relay Part Number Max. Number of Heaters UHA[X][S] 60 - 125 DPST 90436300 4
Page 32 - Internal Wiring Diagram; Flame; TRANSFORMER
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 26 9.5 Internal Wiring Diagram Bl u e Black Black O r a n ge Yellow B r ow n Black White White L2 L1 Black Black G r ee n White White G r ee n G r ee n Bl u e Black Black Black White G r ee n Bl u e G r ee n 24 V AC HOT GR...
Page 33 - Ladder Wiring Diagram
SECTION 9: W IRING 27 9.6 Ladder Wiring Diagram FLAME SENSOR PRESSURE SWITCH THERMOSTAT CONNECTION 6 3 4 5 2 1 120 VAC TRANSFORMER FLUE BLOWER AXIAL FAN AXIAL FAN UHA (300, 350, 400 O n ly) GAS VALVE ELECTRODE IGNITION MODULE Flame S pa r k Limit S witch Limit S witch (UHA 300, 350, 400 O n ly) Ma n...
Page 34 - Electrical Connection to the Heater; Junction box is not provided with heater.
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 28 9.7 Electrical Connection to the Heater IMPORTANT: Junction box is not provided with heater. Conduit can also be attached directly to heater with wire junction made within the heater cabinet. BX Connector Junction Box F...
Page 35 - SECTION 10: OPERATION AND MAINTENANCE; Check that all site wiring is connected in
SECTION 10: O PERATION AND M AINTENANCE 29 SECTION 10: OPERATION AND MAINTENANCE Read this manual carefully before installation, operation, or service of this equipment. All components are accessed via the door secured by four sheet metal screws. Opening the door exposes live electrical connections ...
Page 36 - Figure 16: Automatic Burner Control Sequence; rge time
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 30 Figure 16: Automatic Burner Control Sequence Figure 17: Gas Valve for Models UHA[X][S] 30 - 45 B u rner Se qu ence for Ignition Control Flame Signal Start Gas V al v e Ignition Spark Thermostat 24 V SHUT DO WN RU N STAR...
Page 37 - With the burner firing, measure the pressure on; Check Gas Rate; After burner pressure adjustment, allow the; TOP VIEW
SECTION 10: O PERATION AND M AINTENANCE 31 Figure 18: Gas Valve for Models UHA[X][S] 60 - 125 10.2.2 Start-Up the Gas Valve (All Gases)10.2.2.1 Check Burner Gas Pressure 1. Remove the plug in the outlet (burner) pressure test point and connect a pressure tap and a manometer. 2. With the burner firin...
Page 38 - and the user
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 32 Heat exchanger could be damaged. Warranty will not cover damage to the heat exchanger if operated improperly. Only use the disconnect switch for turning off heater for service or during off-season. 10.2.5 External Contr...
Page 39 - SECTION 11: USER INSTRUCTIONS; Ensure that the electrical and gas supplies to; Reset Button
SECTION 11: U SER I NSTRUCTIONS 33 SECTION 11: USER INSTRUCTIONS 11.1 User Instructions The UHA[X][S] Series heaters are fully automatic and operate from the external controls fitted on site. The only user control at the heater is the ManualReset Limit Switch - See Page 33, Section 11.3.1 11.2 Heate...
Page 40 - The automatic firing sequence will begin as; Simple Troubleshooting; A limit switch may have operated. This may be; Figure 20: LED Diagnostic Codes; LED INDICATION FAULT MODE
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 34 2. The automatic firing sequence will begin as described on Page 30, Figure 16 . The heater will now operate automatically under the control of the on site controls. 11.4.2 To Turn the Heater Off Set the thermostat to t...
Page 41 - through
SECTION 12: S ERVICING 35 SECTION 12: SERVICING 12.1 Servicing Instructions After start-up, the heater will require maintenance to be carried out annually. If the heater is used in a dirty or dusty area, more frequent maintenance may be required. IMPORTANT: After any maintenance or repair work, alwa...
Page 42 - Venting and Air Intake Pipe; The Vicinity of the Heater; See Page 6, Section 3
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 36 12.7 Venting and Air Intake Pipe Inspect all venting and air intake pipe. Ensure that all seams are sealed and suspension points secure. Repair suspension points if any part of the venting or combustion air pipe is sagg...
Page 44 - START
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 38 SECTION 13: TROUBLESHOOTING13.1 General Ens u re proper air flo w clearance for axial fan. Open lo uv ers slightly. Replace axial fan if it does not operate. If pro b lems persist, contact Ro b erts-Gordon LLC at www .r...
Page 45 - Troubleshooting For Automatic Ignition Burner Systems
SECTION 13: T ROUBLESHOOTING 39 13.2 Troubleshooting For Automatic Ignition Burner Systems For optimum heater performance, use only replacement parts sold and supplied by Roberts-Gordon. Conduct start-up procedure as shown on Page 29, Section 10 .
Page 46 - Troubleshooting for Flame Supervision System
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 40 13.3 Troubleshooting for Flame Supervision System NOTE: Minimum flame probe current 1 μA DC. Typical flame probe current 3-5 μA DC. Repair or replace as re qu ired. If pro b lems persist, contact Ro b erts-Gordon LLC at...
Page 47 - Troubleshooting for Gas Valves; Conduct start-up procedure as shown
SECTION 13: T ROUBLESHOOTING 41 13.4 Troubleshooting for Gas Valves 13.5 Troubleshooting for Flue Blower V al v e fa u lty. Replace w ith one of correct type. Fa u lt else w here. Correct press u re pro b lem. If pro b lems persist, contact Ro b erts-Gordon LLC at www .rg-inc.com V al v e Operating ...
Page 48 - SECTION 14: REPLACEMENT PARTS; See warnings and notes; Burner Components; and; Seperated combustion
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 42 SECTION 14: REPLACEMENT PARTS See warnings and notes on Page 35, Section 12 before removing or replacing parts. Burner Components All serviceable burner parts are accessed by the door on the side of the heater. Remove t...
Page 49 - Burner Compartment; MODEL; alignment
SECTION 14: R EPLACEMENT P ARTS 43 14.2 Burner Compartment 14.2.1 Burner Injectors Remo v e flexi b le air d u ct from spigot V ie w ing port for flame pro b e Flame Pro b e B u rner CompartmentCo v er Ignition Electrode Remo v e scre w s and p u ll off bu rner co v er NOTE: Separated com bu stion m...
Page 50 - Ignition Electrode and Flame Probe; Ignition
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 44 14.3 Ignition Electrode and Flame Probe Inshot B u rners .120 (3 mm) spark gap Ignition Electrode Burner Compartment Front Views Man u al Reset Limit S w itch (Position may v ary.) Ignition Electrode Flame Pro b e Limit...
Page 51 - Louver and Louver Springs
SECTION 14: R EPLACEMENT P ARTS 45 14.4 Heat Exchanger The heat exchanger consists of a four-pass design with 1.5" outer diameter [aluminized steel][409 stainless steel] tube. The tube plates are made of [aluminized steel][409 stainless steel]. The tube supports are made of [galvannealed steel] ...
Page 52 - Flue Blower Vertical Installation; Carry out a star t-up after working on or changing an flue blower.
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 46 14.6 Flue Blower Vertical Installation IT IS IMPORTANT THAT ONLY THE CORRECT FLUE BLOWER SPECIFIED FOR EACH MODEL TYPE IS USED WHEN REPLACING THESE ITEMS. Carry out a star t-up after working on or changing an flue blowe...
Page 53 - Ignition Control
SECTION 14: R EPLACEMENT P ARTS 47 14.7 Pressure Switch Pull off 3 way connector. Spring open plastic clips of mounting cradle. Replace with correct type of pressure switch for model. The pressure switches are color coded for each pressure setting. Carry out a start-up after working on or changing a...
Page 54 - Remove the screws
UHA L OW P ROFILE U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 48 14.9.1 Fan Removal and Replacement 14.9.2 To Replace the Fan Assembly To replace the fan assembly, reverse the procedure shown above. • Check that the fan blades are free to rotate before turning on the power to the fan...
Page 55 - in; REAR VIEW
SECTION 15: S PECIFICATIONS 49 SECTION 15: SPECIFICATIONS15.1 Dimension Data MODEL UHA[X][S] 30 UHA[X][S] 45 UHA[X][S] 60 UHA[X][S] 75 UHA[X][S] 100 UHA[X][S] 125 'A' Height in (cm) 12 (30.48) 12 (30.48) 17.75 (45.09) 17.75 (45.09) 23 (58.42) 23 (58.42) 'C' Center of Flue [Top Option] in (cm) 5.2 (1...
Page 57 - ROBERTS GORDON
SECTION 16: ROBERTS GORDON ® BLACKHEAT ™ UHA-S ERIES W ARRANTY 51 SECTION 16: ROBERTS GORDON ® BLACKHEAT ™ UHA-SERIES WARRANTY ROBERTS GORDON ® WILL PAY FOR: Within 24 months from date of purchase by buyer or 27 months from the date of shipment by Roberts-Gordon (whichever comes first), replacement ...
Page 59 - OWNER WARRANTY REGISTRATION CARD; at; Mail o; nu; W a r m A i r H e a t i n g
® OWNER WARRANTY REGISTRATION CARD Abou t t he Owner: Name:__________________________________________________________________________________________________Add r ess:______________________________________City:_________________________ S tate:__________Zip Code:________ Pho n e:_____________________...
Page 62 - Attach this information to the wall near the ROBERTS GORDON
10' (3 m) WARNING © 2007 Roberts-Gordon, LLC www.rg-inc.com Printed in U.S.A. P/N 91040031 Rev B Attach this information to the wall near the ROBERTS GORDON ® heater Read the Installation, Operation and Service Manual thoroughly before installation, operation or service. OPERATING INSTRUCTIONS 1. ST...
