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INSTALLATION AND OPERATION INSTRUCTIONS
OWNER / INSTALLER: For your safety this manual must be carefully and thoroughly read and understood before
installing, operating or servicing this heater. Make certain to follow the Clearances to Combustibles Section 4.
This heater is intended for use with either Natural Gas or Propane Gas. It must be installed by a qualified service
person or a licensed contractor in accordance with state and local codes.
: Improper installation, adjustment, alteration, service, or maintenance can cause property
damage, injury or death. Read the installation, operation and maintenance instructions thoroughly before
installing or servicing this heater. For assistance or additional information, consult a qualified installer, service
agency or the gas supplier.
For Indoor Installations INSPECT all combustion air openings into the building and, if necessary, clear if they
become blocked.
FOR YOUR SAFETY: If this heater is installed indoors, it must be in a sufficiently ventilated space. Exhaust fans
MUST be operating on an appropriate cycle when heaters are operating to avoid a high concentration of carbon
monoxide. When installed in insufficient ventilated spaces this heater may give off carbon monoxide, an
odorless and poisonous gas. CARBON MONOXIDE POISONING MAY LEAD TO DEATH. Early signs of carbon
monoxide poisoning resemble the flue with headaches, dizziness and nausea. If you experience these signs, GET
FRESH AIR IMMEDIATELY! Have the heaters serviced as soon as possible and check the ventilation into the
building.
INSTALLER: This manual is the property of the owner. Please present this manual to the owner when you leave
the job site.
IF YOU SMELL GAS:
1. Shut off gas to the appliance.
2. Extinguish any open flame.
3. If odor continues, keep away from the
appliance and immediately call your gas supplier.
!IMPORTANT: SAVE THIS MANUAL FOR FUTURE REFERENCE.
Form 44201460
Mar 2019
INFRARED RADIANT PATIO HEATER
260 North Elm St. • Westfield, MA 01085
Telephone (413) 568-9571 • Fax (413) 562-8437 • www.mestek.com
Models: R(B,S) W35-N2 and L2
Two Stage (or Single stage)
UNVENTED - (For all Outdoor applications
and Indoor Non-Residential Spaces)
DANGER
DO NOT store or use gasoline or other
flammable vapors and liquids in the vicinity of
this or any other appliance.
An LP-cylinder not connected for use shall not
be stored in the vicinity of this or any other
appliance.
Mestek, Inc.
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Summary of Contents for Mestek RW35-N2
- Page 1 !IMPORTANT: SAVE THIS MANUAL FOR FUTURE REFERENCE. Mestek, Inc. 260 North Elm St. • Westfield, MA 01085 Telephone (413) 568-9571 • Fax (413) 562-8437 • www.mestek.com Form 44201460 Mar 2019...
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Page 2: Table Of Contents
Table of Contents 1.0) SAFETY ................................... 2 2.0) INSTALLER RESPONSIBILITY ............................ 2 3.0) GENERAL INFORMATION ............................2 4.0) MINIMUM CLEARANCES TO COMBUSTIBLES ......................4 4.1) INDOOR clearances to combustibles ........................8 4.2) OUTDOOR clearances to combustibles ........................9 5.0) SPECIFICATIONS ..............................10 6.0) PACKING LIST ............................... - Page 3 1.0) SAFETY This heater is a self-contained infrared radiant ceramic heater. Safety information required during installation and operation of this heater is provided in this manual and the labels on the product. The installation, service and maintenance of this heater must be performed by a contractor qualified in the installation and service of gas fired heating equipment.
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Page 4: Minimum Clearances To Combustibles
SAFETY REQUIREMENTS The heater area must be kept clear and free from combustible materials, gasoline and other flammable vapors and liquids. This heater is designed for use with one type of gas (LPG or Natural). Make sure that the type of gas to be supplied to this heater matches that shown on the heater rating plate. - Page 5 Mestek, Inc. will not recognize the warranty for any use other than space heating. This heater is for Indoor and Outdoor Installation and is used in Unvented mode. The term Unvented actually means Indirect Vented. While the products of combustion are expelled into the building, national codes require 4 CFM/1000 BTU of heater input ventilation in the building to dilute these products of combustion.
- Page 6 This heater can be equipped with a heat shield to reduce the clearances to combustibles towards the ceiling. Due to the variety of possible heater mounting angles the heat shield must be mounted in the correct location to match the heater mounting angle. See section 13.0 heat shield installation. Approved installation angles are 0, 15, 30, 45 and 60 degrees with the heat shield installed.
- Page 7 “specify the maximum permissible stacking height to maintain the required clearances from the heater to combustibles.” Mestek, Inc. recommends posting these signs adjacent to the heater thermostat or other suitable location that will provide enhanced visibility.
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Page 8: Indoor Clearances To Combustibles
4.1) INDOOR CLEARANCES TO COMBUSTIBLES The stated clearance to combustibles represents a surface temperature of 90º F (50º C) above room temperature. Building materials with a low heat tolerance (such as plastics, vinyl siding, canvas, tri-ply, etc.) may be subject to degradation at lower temperatures. It is the installer’s responsibility to assure that adjacent materials are protected from degradation. -
Page 9: Outdoor Clearances To Combustibles
4.2) OUTDOOR CLEARANCES TO COMBUSTIBLES The stated clearance to combustibles represents a surface temperature of 117º F (65º C) above room temperature. Building materials with a low heat tolerance (such as plastics, vinyl siding, canvas, tri-ply, etc.) may be subject to degradation at lower temperatures. It is the installer’s responsibility to assure that adjacent materials are protected from degradation. -
Page 10: Specifications
44625010 Propane RBW35-N2 – BEACON/MORRIS 44625200 Natural RBW35-L2 – BACON/MORRIS 44625210 Propane Number Part Number Description Qty Per See Above Patio Heater 41373050 Ceramic Glass 4mm Black 43344970 Mestek Clearances sign 44568039 Angle Mounting Gauge Plate Form 44201460 Mar 2019... -
Page 11: Heater Sizing Guidelines
Minimums are shown as a guideline for human comfort. For more assistance with patio heater sizing and layout please contact your local Mestek, Inc. representative. 8.0) TYPICAL HEATER LAYOUTS The diagram below shows the recommended spacing layout between heaters. - Page 12 Distance between 8ft (2.5m) 16ft (4.9m) 8ft (2.5m) 18ft (5.5m) 8ft (2.5m) 16ft (4.9m) heaters* *Note the distance D for angled heaters applies when they are facing towards each other. Note: Local codes may have special requirements regarding head clearance requirements. Some local codes require all portions of overhead radiant heaters to be located at least 8 feet above the floor.
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Page 13: Dimensions
9.0) DIMENSIONS 10.0) ACCESSORIES Below are the optional accessories available for the Wind Blocker Patio heater. Description Picture 44560350 Wall Ceiling Telescopic Mounting Bracket Kit- 15"-22" overhead space (check clearances to combustibles space above the heater before ordering) 44560351 Ceiling Telescopic Mounting Form 44201460... - Page 14 Description Picture Bracket Kit- 22"-30" overhead space (check clearances combustibles space above the heater before ordering) 44560352 Wall Ceiling Telescopic Mounting Bracket Kit- 15"-30" overhead space (check clearances to combustibles space above the heater before ordering) includes both the 15-22” and 22- 30”...
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Page 15: Unpacking The Heater
Description Picture 44604500 Gas Connection Kit- 1/2"-Includes Gas Connector, Manual Ball Valve, Sediment Trap (Tee, Cap, Nipple), Thread Sealing Compound 03307260 Gas regulator 2psig to 11” w.c. ½” NPT inlet and outlet. 40147010 Position Switch Kit, (High/Low/Off) for manual heater control (N2/L2) 44195000 Two Stage Relay Kit (one per... -
Page 16: Installation
12.0) INSTALLATION In order to protect the ceramic glass it is recommended to only insert the ceramic glass once all the other installation steps have been completed. The ceramic glass must be removed to wire the heater and for commissioning. Various means of suspending the heater can be used. -
Page 17: Heater Mounting Angle
12.1) HEATER MOUNTING ANGLE Every heater is supplied with an angle gauge. The gauge is attached with tape to the heater control side. The angle gauge is used in combination with a level to ensure that the heater is installed at one of the mounting angles of 0 , 15 , 30... -
Page 18: Indoor / Outdoor Rigid Hanging Brackets
Diagram below shows Horizontal mounting with chain. Diagram below shows the possible chain methods to hang at different angles. Notes: When suspending at 25 degrees if the heat shield is installed use the 30-degree location for the heat shield. 12.3) INDOOR / OUTDOOR RIGID HANGING BRACKETS Fixed hanging methods which prevent the heater from swaying must be used for outdoor installations. - Page 19 The tables below can be used to select the correct bracket to ensure that the heater is installed at the correct clearance to combustible distance from the ceiling depending on whether the heater is installed indoors or outdoors, the mounting angle and whether a heat shield is installed. 15-22”...
- Page 20 A left-hand LH and right-hand RH bracket must be assembled. Torque screws and locknuts to 5 lbf⋅ft. To mount the hanging brackets to the wall/ceiling: 1. Measure and mark distances for the hanger bracket holes. 2. Hanging brackets should first be fixed to the wall or ceiling surface by means of 4 lag bolts – (not supplied) (3/8”...
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Page 21: Heat Shield Installation
13.0) HEAT SHIELD INSTALLATION A heat shield can be used to reduce the clearance to combustible distances. Refer to Minimum Clearance to Combustibles in Section 4). The heat shield is available as an accessory Kit No. 44566300. Item No. Part No. Description Quantity 02359000... - Page 22 Step 2. Attach the (2) holder brackets to the top of the heater using (2) black oxide #8 screws per bracket. Step 3. Identify the correct holes to mount the shield hanger rail from the illustration below. Step 4. Attach the heat shield hanger rail to the holder bracket using (2) black oxide #8 screws on each end. Horizontal position shown below.
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Page 23: Assembly Of The Ceramic Glass
Step 6. Place the new clearance label on the control end of the heater. NO NOT PLACE LABEL ON THE HEAT SHIELD. See below the correct holes to mount the heat shield to the hanger rail for other installation angles. 14.0) ASSEMBLY OF THE CERAMIC GLASS Only install the ceramic glass once the heater has been attached to a suitable gas (see Section 15.0), electrical... -
Page 24: Gas Connections And Regulation
2. The side of the glass where the logo is attached must be slid in first for the logo’s final position to be at the control side of the heater. 3. Slide the glass into the “Glass Retainer Rails”. The glass must be held parallel to the Glass Retainer Rails during assembly. - Page 25 IMPORTANT BEFORE CONNECTING THE GAS TO THE HEATER a) Connect to the supply tank or manifold in accordance with state or local building codes. Authorities having jurisdiction should be consulted before the installation is made. (In Canada, refer to the latest edition of CSA B149.1, Natural Gas and Propane Installation Code.) b) Check that the gas fuel on the burner rating plate matches the fuel for the application.
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Page 26: Instructions For Pressure Test Gauge Connection
15.1) INSTRUCTIONS FOR PRESSURE TEST GAUGE CONNECTION 15.2) INLET GAS PRESSURE CHECK 1. The installer will provide a 1/8” N.P.T. tapped plug, accessible for test gauge connection immediately upstream of the gas supply connection to the heater. Form 44201460 Mar 2019... -
Page 27: Outlet Gas Pressure Check And Adjustments
15.3) OUTLET GAS PRESSURE CHECK AND ADJUSTMENTS Gauges that measure pressure in pounds per square inch are not accurate enough to measure or set the manifold pressure. All measurements MUST BE made when the heater and all other gas burning equipment that are connectied to the gas supply system are operating at maximum capacity. -
Page 28: Electrical Connections
16.0) ELECTRICAL CONNECTIONS All electric wiring shall conform to the latest edition of the National Electrical Code (ANSI/NFPA No. 70), or the code legally authorized in the locality where the installation is made. 2. The unit must be electrically grounded in accordance with the National Electrical Code (ANSI/NFPA No. 70-latest edition). -
Page 29: Internal Connection Wiring Diagram
16.1) INTERNAL CONNECTION WIRING DIAGRAM The figure below shows the internal wiring diagram of the heater and the optional external connections depending on how the heater will be controlled. 16.2) FIELD CONNECTIONS AND WIRING DIAGRAMS – 2 STAGE 24V The figure below shows the field wiring connections to the heater terminal block. Form 44201460 Mar 2019... - Page 30 A. LOW VOLTAGE (24V) 3 POSITION SWITCH CONNECTIONS - SINGLE HEATERS B. LOW VOLTAGE (24V) 3 POSITION SWITCH CONNECTIONS - MULTIPLE HEATERS C. LOW VOLTAGE (24V) THERMOSTAT CONNECTIONS - SINGLE HEATERS Form 44201460 Mar 2019...
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Page 31: Field Connections And Wiring Diagrams - Single Stage 24V
D. LOW VOLTAGE (24V) THERMOSTAT CONNECTIONS - MULTIPLE HEATERS 16.3) FIELD CONNECTIONS AND WIRING DIAGRAMS – SINGLE STAGE 24V The figure below shows the internal connection to operate the heater turning on and off 24V power to the heater with a permanent live power supply. Important: To operate the heater as single stage a jumper wire must be installed across the 24V LO and HI terminals as shown below. -
Page 32: Field Connections And Wiring Diagrams - Single Stage 120V
A. LOW VOLTAGE (24V) ON / OFF SWITCH CONNECTION - SINGLE HEATERS To operate the heater with an individual 24V thermostat use the same connections as above for the switch. 16.4) FIELD CONNECTIONS AND WIRING DIAGRAMS – SINGLE STAGE 120V The figure below shows the internal connection to operate the heater turning on and off 120V power to the heater. -
Page 33: Ventilation
B. LINE VOLTAGE (120V) ON / OFF SWITCH CONNECTION - MULTIPLE HEATERS 17.0) VENTILATION Where unvented infrared heaters are used, natural or mechanical means shall be provided to supply and exhaust at least 4 cfm per 1000 Btu/hr input of installed heaters. Exhaust openings for removing flue products shall be above the level of the heaters. -
Page 34: Sequence Of Operation
Direct Burner Spark Ignition Modules. 1. Turn on the gas supply to the appliance. 2. Set any time switch or thermostats to demand heat. 3. Switch on the electrical supply to the appliance. 4. Following a 7 seconds pre-purge the burner should ignite after a further 10 seconds. 5. -
Page 35: Servicing And Annual Maintenance
19.0) SERVICING AND ANNUAL MAINTENANCE This heater must be cleaned and serviced annually by a qualified contractor before the start of each heating season and at any time excessive accumulation of dust and dirt is observed. Maximum heating efficiency and clean combustion will be maintained by keeping the heater clean. -
Page 36: Trouble Shooting
Electrode condition: Visually check that the electrode gap is maintained at 5mm (0.199”) and that the tips of the flame sensor and spark electrode are free from deposits. Clean off any deposits. Check that the electrode ceramic is free from cracks. See Section 21.2) ... - Page 37 Form 44201460 Mar 2019...
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Page 38: Replacing Parts
21.0) REPLACING PARTS 21.1) REMOVAL OF GLASS PANEL 1. Remove the glass retainer 1. 2. Carefully slide the glass panel 2 from the retainer rails and away from heater. Access to the gas control valve and ignition module can now be made by loosening the screws from the access panel assembly. -
Page 39: Removal Of Spark Electrode/Flame Sensor
21.2) REMOVAL OF SPARK ELECTRODE/FLAME SENSOR 1. Remove the glass panel as shown in Section 21.1). Open the access panel assembly by loosening the screws. 2. Disconnect the ignition cable and flame sensor wires (not shown) from the spark electrode/flame sensor. 3. -
Page 40: Removal Of Gas Valve
21.4) REMOVAL OF GAS VALVE 1. Open the access panel assembly as shown in Section 21.2). Note: This is removed from the illustration for clarity. Loosen the panel nut 1 using a ¾” (19mm) end wrench and remove from the gas valve manifold. 2. -
Page 41: Removal Of Ignition Control Module And Transformer
21.5) REMOVAL OF IGNITION CONTROL MODULE AND TRANSFORMER 1. Open the access panel assembly as shown in Section 21.2) Note: This is removed from the illustration for clarity. Disconnect the ignition cable from the ignition control module. 2. Disconnect the 5 way Molex electrical wire harness connector (not shown) from the module. Remove the screws 2 holding the ignition control module and remove it from the heater. -
Page 42: Installation Data
22.0) INSTALLATION DATA Date of Number of Installation: Heaters in System: Heater Serial Number: Heater Model: N=Natural Gas R(B,S)W35 — L=Propane Gas Form 44201460 Mar 2019... -
Page 43: Replacement Parts Guide
23.0) REPLACEMENT PARTS GUIDE Item Part No. Description Qty. Main Heater Components 02352000 Screw, Pan Head Thread #8 x 1/2" Type AB SS Black Oxide 02261030 Ground Screw #8-32 x 3/8" (Green Coated - Type F) 02132089 Rivet 1/8" x .337" SS (grip range .126 – .187) – not shown - 02168050 Screw, Pan Head Machine #10-24 x 3/8”... - Page 44 43269760 Label, “Made IN U.S.A.” 44201460 Manual, Installation and Operation Instructions (not shown) IMPORTANT: Please order by Part Number, not by Item Number. Refer to complete Model Number when ordering. All replacement parts prices are available when ordering. MODEL NUMBER SUFFIXES: N2 = Natural Gas L2 = Propane Gas...
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