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Mestek RSG025-N1 Installation And Operation Instruction Manual

Residential radiant garage tube heater
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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.
RESIDENTIAL RADIANT GARAGE TUBE HEATER
Single and Two Stage Pull Through System (Negative Pressure)
!INSTALLER: This manual is the property of the owner. Please present this manual to the
owner when you leave the job site.
▲WARNING: 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 equipment.
IF YOU SMELL GAS:
! DO NOT try to light any appliance.
! DO NOT touch any electrical switch; DO NOT use any
telephone in your building.
! IMMEDIATELY call your gas supplier from a neighbor's
telephone. Follow the gas supplier's instructions. If you
cannot reach your gas supplier, call the fire department.
!IMPORTANT: SAVE THIS MANUAL FOR FUTURE REFERENCE.
Models:
R (B,S,M) G 025 – (N1/L1/N2/L2)
R (B,S,M) G 035 – (N1/L1/N2/L2)
R (B,S,M) G 045 – (N1/L1/N2/L2)
FOR YOUR SAFETY
Mestek, Inc.
260 North Elm St. • Westfield, MA 01085
Telephone (413) 568-9571 • Fax (413) 562-8437 • www.mestek.com
DO NOT store or use gasoline or other
flammable vapors and liquids in the vicinity of
this or any other appliance.
Form 43471040
Dec 2017

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Summary of Contents for Mestek RSG025-N1

  • Page 1 Follow the gas supplier's instructions. If you cannot reach your gas supplier, call the fire department. !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 43471040 Dec 2017...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SECTION DESCRIPTION PAGE 1.0) Safety ..............................2 2.0) Installer Responsibility ........................2 3.0) General Information ........................... 2 4.0) Minimum Clearances to Combustibles ................... 4 5.0) Specifications............................5 6.0) Packing List ............................5 6.1) Accessory Packages .......................... 7 7.0) Dimensions ............................

  • Page 3: Safety

    1.0) SAFETY This heater is a self-contained infrared radiant tube 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.
  • Page 4 Although these heaters may be used in many applications other than space heating (e.g., process heating), Mestek will not recognize the warranty for any use other than space heating. This heater is for Indoor Installation and Covered Patio Installation only and can be used in either Vented or Unvented mode.

  • Page 5: Minimum Clearances To Combustibles

    NFPA54 requires that the installer must post signs that will “specify the maximum permissible stacking height to maintain the required clearances from the heater to combustibles.” Mestek recommends posting these signs adjacent to the heater thermostat or other suitable location that will provide enhanced visibility.

  • Page 6: Specifications

    8’ 8’ * MOUNT HEATERS AS HIGH AS POSSIBLE. Minimums are shown as a guideline for human comfort and uniform energy distribution for complete building heating applications. Consult your Mestek representative for the particulars of your installation requirements. Model Identification:...
  • Page 7 CONTROL/DRAFT INDUCER PACKAGE NUMBERS 1-STAGE CONTROLS - MESTEK 2-STAGE CONTROLS - MESTEK MODEL NO. PART NO. GAS TYPE MODEL NO. PART NO. GAS TYPE RMG025N1U0 44499010 NATURAL RMG025N2U0 44499510 NATURAL RMG035N1U0 44499030 NATURAL RMG035N2U0 44499530 NATURAL RMG045N1U0 44499050 NATURAL RMG045N2U0...

  • Page 8: Accessory Packages

    6.1) ACCESSORY PACKAGES Exhaust Hood Package, Part #42924000 Contains: Exhaust Hood Assembly, #42925550……QTY–1 #8-18 x ½ Self-Drilling Screws, #02189030……QTY–2 B. Kit, 2-Stage Relay Board, Part #44195000 Contains: Relay Board , #30709058……QTY–1 Enclosure, #30709059……QTY–1 Cord Connector – ½” , #30635040……QTY–2 Deflector Kit, Part #43504000 The Deflector Kit is available for use to reduce the clearances to combustibles below the heater.

  • Page 9: Dimensions

    7.0) DIMENSIONS Form 43471040 Dec 2017...

  • Page 10: Heater Assembly Overview

    8.0) HEATER ASSEMBLY OVERVIEW Form 43471040 Dec 2017...

  • Page 11: Typical Suspension Methods

    6. Heaters must not be supported by gas or electric supply lines and must be suspended from a permanent structure with adequate load capacity. Mestek recommends that the tube sections be suspended using chains with turnbuckles. This will allow slight adjustments after assembly and heater expansion/ contraction during operation.

  • Page 12: Heater Assembly

    10.0) HEATER ASSEMBLY During field assembly of the heater, the recommended procedure is as follows: 1. Put the suspension in place (according to Section 7.0) using proper suspension method (see Section 9.0). Trapeze Method Individual Suspension Method 2. Lift the tube section and suspend it into place. When lifting, caution should be used to avoid damaging the assembly.
  • Page 13 3. Assembly the reflector onto the tube section. Leave 3” space between the tube flange and the reflector for later mounting of control box and draft inducer. 4. Place the flanges of the control end reflector flush with the end of the first reflector. Secure by sliding speed clips onto reflector edges.
  • Page 14 7. Slip the plastic vacuum air tube over the 1/4” O.D. aluminum tube end of the draft inducer and the air switch probe in the control box. The air tube should be shortened to prevent a downward sag which could allow condensation build-up in the tube.

  • Page 15: Gas Connections And Regulations

    ANGLE MOUNTED HEATERS ONLY 10. The heater can be mounted horizontally or up to an angle of 45º maximum from horizontal. When the heater is to be angle mounted adjacent to a sidewall, make sure the draft inducer assembly is on the lower side of the heater so that the control box access panel is easily accessible.
  • Page 16 10. After all gas connections have been made, make sure the heater and all gas outlets are turned off before the main gas supply is turned on slowly. Turn the gas supply pressure on and check for leaks. To check for leaks, check by one of the methods listed in Appendix D of the National Fuel Gas Code.

  • Page 17: Instructions For Pressure Test Gauge Connection

    12.0) INSTRUCTIONS FOR PRESSURE TEST GAUGE CONNECTION SUPPLY PRESSURE 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. OUTLET GAS PRESSURE CHECK AND ADJUSTMENTS WHITE-RODGERS GAS VALVES Gauges that measure pressure in pounds per square inch are not accurate enough to measure or set the manifold pressure.
  • Page 18 GAS PRESSURE TABLE SUPPLY PRESSURE MANIFOLD PRESSURE GAS TYPE High Low (2-stage only) Minimum* Maximum Natural Gas 3.5” W.C. 1.4” W.C. 5” W.C. 14” W.C. Propane Gas 10.0” W.C. 4.0” W.C. 11” W.C. 14” W.C. *Minimum permissible gas supply pressure for purpose of input adjustment. Form 43471040 Dec 2017 -17-...

  • Page 19: Electrical And Thermostat Connections

    13.0) ELECTRICAL AND THERMOSTAT CONNECTIONS 1. 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 20 SINGLE STAGE CONTROLS - INTERNAL CONNECTION WIRING DIAGRAM SINGLE STAGE CONTROLS - SCHEMATIC WIRING DIAGRAM SINGLE STAGE CONTROLS - THERMOSTAT WIRING DIAGRAMS A. LINE VOLTAGE (120V) THERMOSTAT CONNECTIONS – SINGLE HEATER PER THERMOSTAT Form 43471040 Dec 2017 -19-...
  • Page 21 B. LINE VOLTAGE (120V) THERMOSTAT CONNECTIONS – MULTIPLE HEATERS PER THERMOSTAT C. LOW VOLTAGE (24V) THERMOSTAT CONNECTIONS – SINGLE HEATER PER THERMOSTAT Order 24V Relay Kit (Part No. 43274000) for Low Voltage (24V) thermostat connection. D. LOW VOLTAGE (24V) THERMOSTAT CONNECTIONS – MULTIPLE HEATERS PER THERMOSTAT Form 43471040 -20- Dec 2017...
  • Page 22 13.2) TWO STAGE (N2/L2) – INTERNAL AND THERMOSTAT CONNECTIONS TWO STAGE CONTROLS - INTERNAL CONNECTION WIRING DIAGRAM Form 43471040 Dec 2017 -21-...
  • Page 23 TWO STAGE CONTROLS - SCHEMATIC WIRING DIAGRAM TWO STAGE CONTROLS - THERMOSTAT WIRING DIAGRAMS A. LOW VOLTAGE (24V) THERMOSTAT CONNECTIONS – SINGLE HEATER PER THERMOSTAT Form 43471040 -22- Dec 2017...
  • Page 24 B. LOW VOLTAGE (24V) THERMOSTAT CONNECTIONS – MULTIPLE HEATERS PER THERMOSTAT C. MANUAL SWITCH CONNECTIONS – SINGLE HEATER OPERATION PER DUAL MANUAL SWITCH Form 43471040 Dec 2017 -23-...
  • Page 25 D. MANUAL SWITCH CONNECTIONS – MULTIPLE HEATERS OPERATION PER DUAL MANUAL SWITCH Form 43471040 -24- Dec 2017...

  • Page 26: Venting

    14.0) VENTING This is a category lll appliance. A. BASIC FLUE VENTING — Venting must comply with the latest edition of the National Fuel Gas Code (ANSI Z223.1-latest edition) or the authority having jurisdiction. Other venting references are in the equipment volume of the ASHRAE Handbook.
  • Page 27 9. Single-wall metal pipe shall not originate in any unoccupied attic or concealed space and shall not pass through any attic, inside wall or concealed space, or through any floor. For the installation of a single-wall metal pipe through an exterior combustible wall, refer to latest edition of the National Fuel Gas Code or the authority having jurisdiction.
  • Page 28 SINGLE HEATER VENTING (HORIZONTAL THROUGH SIDEWALL) This heater, when horizontally vented, must be installed with the approved venting system. When venting the heater horizontally through a combustible outside sidewall, the same requirements listed previously for venting Vertical Through The Roof apply except as follows: 1.
  • Page 29 MULTIPLE HEATER VENTING (CONNECTIONS INTO A COMMON VENT OR MANIFOLD) Requirements for venting of multiple heaters are the same as described for SINGLE HEATER VENTING except as follows: 1. The common vent size and total vent height is normally determined by the number of heaters per common vent, length of horizontal connector runs, and connector rise.
  • Page 30 Multiple Heater Venting (Connections into a Manifold) VENT SIZING TABLE — Multiple Heater Venting Number of Heaters R (B,S,M) G 025 4” 4” 4” 5” 5” R (B,S,M) G 035 4” 4” 5” 5” 6” R (B,S,M) G 045 4” 4”...

  • Page 31: Air For Combustion

    15.0) AIR FOR COMBUSTION If indoor combustion air is to be supplied for a tightly enclosed area, one square inch of free area opening shall be provided below the heater for each 1,000 Btu/hr per hour of heater input. When outside air is used, the opening below the heater shall be one square inch of free area for each 4,000 Btu/hr of heater input.
  • Page 32 Form 43471040 Dec 2017 -31-...

  • Page 33: Lighting And Shutdown Instructions

    16.0) LIGHTING AND SHUTDOWN INSTRUCTIONS 1. Turn on the gas and electrical supply. Set the thermostat to call for heat. The blower motor will energize. 2. Ignition should occur after the 30-second air pre-purge. 3. If ignition fails, the unit will spark for approximately 21 seconds and go into safety lockout. Turn the thermostat (power) off for 60 seconds to take the system out of lockout.
  • Page 34 SEQUENCE OF OPERATION – TWO STAGE (N2/L2) 17.1) The chart below shows the sequence of operation for the normal operating cycle for a two stage heater (N7/L7). .If the flame is not sensed during sequence T3 or T4, then the burner will automatically begin ignition as in sequence T2.

  • Page 35: Control Component Location

    18.0) CONTROL COMPONENT LOCATION NOTE: Access panel only opens to 90. Form 43471040 -34- Dec 2017...

  • Page 36: Cleaning And Annual Maintenance

    19.0) CLEANING 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 37: Troubleshooting Guide - Single Stage (N1/L1)

    20.0) TROUBLESHOOTING GUIDE – SINGLE STAGE (N1/L1) Form 43471040 -36- Dec 2017...
  • Page 38 TROUBLESHOOTING GUIDE – SINGLE STAGE (CONTINUED) Form 43471040 Dec 2017 -37-...
  • Page 39 TROUBLESHOOTING GUIDE – SINGLE STAGE (CONTINUED) Form 43471040 -38- Dec 2017...

  • Page 40: Troubleshooting Guide - Two Stage (N2/L2)

    20.1) TROUBLESHOOTING GUIDE – TWO STAGE (N2/L2) Form 43471040 Dec 2017 -39-...
  • Page 41 TROUBLESHOOTING GUIDE – TWO STAGE (CONTINUED) Form 43471040 -40- Dec 2017...
  • Page 42 TROUBLESHOOTING GUIDE – TWO STAGE (CONTINUED) Form 43471040 Dec 2017 -41-...
  • Page 43 TROUBLESHOOTING GUIDE – TWO STAGE (CONTINUED) Form 43471040 -42- Dec 2017...

  • Page 44: Replacing Parts

    21.0) REPLACING PARTS Only use genuine Mestek replacement parts. Parts are available from the factory for replacement by a licensed person. Refer to the Replacement Parts Guide in Section 23.0) for all replacement parts. 21.1) REMOVAL OF SPARK ELECTRODE 1. Disconnect electrical supply and open access panel.

  • Page 45: Removing Main Burner And Gas Valve

    21.2) REMOVING MAIN BURNER AND GAS VALVE The main burner can be inspected without removing the burner housing from the heat exchanger tube. 1. Disconnect electrical supply and gas connection at the restrainer nipple. 2. Open the access panel and disconnect the wires from gas valve. 3.

  • Page 46: Ignition System Checks

    21.4) IGNITION SYSTEM CHECKS TO CHECK IGNITION CABLE. a. Make sure that the ignition cable does not touch any metal surface. b. Make sure that connections to the stud terminal and the igniter/sensor are clean and tight. Make sure that the ignition cable provides good electrical continuity. TO CHECK IGNITION SYSTEM GROUNDING.

  • Page 47: Motor And Blower Wheel Check

    21.5) MOTOR AND BLOWER WHEEL CHECK If draft inducer motor fails to run: a. Check power supply to junction box. b. Check for loose or broken motor lead wire. Check to see that blower wheel turns freely and is not rubbing housing. Blower wheel may have worked loose from shaft and jammed against housing.

  • Page 48: Replacement Parts Guide

    23.0) REPLACEMENT PARTS GUIDE DRAFT INDUCER COMPONENTS Item No. Part No. Description Qty. 42737990 Kit, Draft Inducer Replacement 42928000 Kit, Motor Replacement 03721000 Motor 30347000 Motor Spacer (4 per motor) 42740000 Motor Plate 03723000 Blower Wheel 43221000 Draft Inducer Gasket 42744000 Sensing Tube, Draft Inducer 42742000...
  • Page 49 43344050 Label, Gas Connector Warning 43470080 Label, Clearance to Combustibles 42848250 Label, Nameplate – Sterling 1-stage 42848251 Label, Nameplate – Mestek 1-stage 42848252 Label, Nameplate – Beacon/Morris 1-stage 42848260 Label, Nameplate – Sterling 2-stage 42848261 Label, Nameplate – Mestek 2-stage 42848262 Label, Nameplate –...
  • Page 50 43470030 Label, Warning (residential) 42834000 Label, 120V Caution 42875000 Label, Warning 43470040 Label, Operating Instructions 43470050 Label, Caution/Attention 43470060 Label, Horizontal Venting 43269060 Label, Thermostat Connection 2-stage 43269070 Label, Low/High Fire 2-stage Form 43471040 Dec 2017 -49-...
  • Page 51 BODY COMPONENTS Item Part No. Description 02266010 Reflector Speed Clip 42769011 Reflector Clamp with screw (4 per heater) 42770000 “U” Bolt Clamp, 3” OD Tube (6 per heater) 02127110 “U” Bolt Hex Nut, 5/16-18 (2 per “U” Bolt) 42773000 Tube Support/Hanger Bracket, 18-1/2” (2 per heater) 42763080 Reflector, 8’...

  • Page 52: Warnings Card

    24.0) WARNINGS CARD Copies of this card may be ordered under part no. 43344970 for installation near the heater. Form 43471040 Dec 2017 -51-...

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