Mr. Heater MHU 50, MHU 80 Horizontal Venting General, Vent Termination on Single Wall Vent

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B – VERTICAL VENTS USING METAL VENT PIPE – COMMERCIAL AND RESIDENTIAL INSTALLATIONS

HSU compact unit heaters are listed as Category I appliances for vertical vent installations.

1.HSU unit heaters are to be used with NFPA- or ANSI-approved chimneys, U.L. listed type B-1 gas vents, single wall metal pipe, or listed chimney lining system for gas venting where applicable, as well as the modifications and limitations listed in figure 2. Seal single wall vent material according to the section A - General Recommendations and Requirements.

2.The vent connector shall be 3” (76mm) diameter on 50 units. In all cases, a flue transition piece (supplied) is required to fit over the outlet of the induced draft assembly on the appliance.

3.Keep the vent connector runs as short as possible with a minimum number of elbows. Refer to the (American) National Fuel Gas Code ANSI Z223.1 or (Canada) CSA B149.1 Natural Gas and Propane Installation Code for maximum vent and vent connector lengths. Horizontal run of the vent connector from the induced draft blower to the chimney/vent cannot exceed the values in table 2.

4.When the length of a single wall vent, including elbows, exceeds 5 feet (1.5m), the vent shall be insulated along its entire length with a minimum of 1/2” thick foil faced fiberglass 1-1/2# density insulation. If a single wall vent is used in an unheated area it shall be insulated. Failure to do so will result in condensation of flue gases.

5.The unit may be vented vertically as a single appliance or as a common vent with other gas-fired appliances. In common venting situations, vent connectors for other appliances must maintain a 4” (100mm) vertical separation between the vent connectors. Refer to common venting tables in the (American) National Fuel Gas Code ANSI Z223.1 or (Canada) CSA B149.1 Natural Gas and Propane Installation Code for proper vent size.

6.Clearance to combustible material is 6” (152mm) for single wall vent material except where a listed clearance thimble is used. Clearance to combustible material for type B-1 vent or factory-built chimney is per manufacturer’s instructions.

7.The vent connector shall be supported without any dips or sags. Vertical vents shall be supported in accordance with their listing and manufacturers’ instructions. All horizontal vent connector runs shall have a slope up to the vertical vent of at least 1/4” per foot (1mm per 50mm).

8.All vertical type B-1 vents, single wall vents, or listed chimney lining system must be terminated with a listed vent cap or listed roof assembly.

9.The vent must extend at least 3’ (1m) above the highest point where it passes through a roof of a building and at least 2’ (0.6m) higher than any part of a building within a horizontal distance of 10’ (3.05m) unless otherwise specified by the (American) National Fuel Gas Code, ANSI Z223.1 or (Canada) CAN/CGA-B149 Installation Code. The vent must extend at least 5’ (1.6m) above the highest connected equipment flue collar.

VENT TERMINATION ON SINGLE WALL VENT

SINGLE WALL TERMINATION

ROOF FLASHING

ROOF PITCHED

FROM 0” TO 45”

2” CLEARANCE

SHALL NOT BE ATHIMBLE CONCEALED SPACE

DOUBLE WALL (TYPE B-1) TERMINATION

ROOF FLASHING

ROOF PITCHED

FROM 0” TO 45”

12” MAX

CLEARANCE TO BE AS

 

 

SPECIFIED ON TYPE “B”

 

VENT PIPE

SEAL JOINT BETWEEN SINGLE WALL VENT

AND “B”VENT AND THE ANNULAR SPACE OF THE “B” VENT

FIGURE 2

C – HORIZONTAL VENTING – GENERAL

Due to changes to Z83-8 2009 CSA2.6-2009, the use of single wall B-Vent is no longer permitted as an acceptable material when venting horizontally, this change covers both residential and commercial installations. All horizontally vented units manufactured after July of 2011 must be vented as a Caterory

IIIUnit/Utility Heater in compliance with UL 1738 & ULS636. Common venting is not allowed when horizontally venting the unit heater.

The minimum horizontal vent length is three feet (914mm).

1.If possible, do not terminate the horizontal vent through a wall that is exposed to prevailing wind. Exposure to excessive winds can affect unit performance.

2.Vent termination must be free from obstructions and at least 12” (306mm) above grade level and maximum snow height.

3.Do not terminate vent directly below roof eaves or above a walkway, or any other area where condensate dripping may be troublesome and may cause some staining. Avoid windows where steam may cause fogging or ice buildup.

4.When horizontally vented, minimum clearance for termination from any door, window, gravity air inlet, gas or electric meter, regulators, and relief equipment is 4 ft. (1.2m) for U.S. installations. Refer to NFPA 54/ANSI Z223.1 in the U.S.A. and CSA B149.1 Natural Gas and Propane Installation Code and

.2 in Canada or with authorities having local jurisdiction. In Canada, vent termination must have a minimum 6 ft. (1.8 m) horizontal clearance from gas and electric meters and relief devices as specified in the Canadian B149.1, Natural Gas Installation Code.

Compact Unit / Utility Heater

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Operating Instructions and Owner’s Manual

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Contents For Your Safety MR. HEATER, INC., 4560 W TH ST., CLEVELAND, Ohio 44135Contents General Hazard WarningTOP View MHU 50/MHU 80 Unit DimensionsDimension Side ViewRequirements CSA in the USA Garage InstallationsShipping Requirements CSA in CanadaVenting Unit Heater InstallationCombustion and Ventilation AIR General Recommendations and RequirementsHorizontal Venting General Vent Termination on Single Wall VentHorizontal Venting Commercial Horizontal Venting ResidentialCondensate Drain Through TEE Pipe and Drain Loop Venting Using a Masonry Chimney Horizontal Venting Residential InstallationRemoval of Unit from Common Vent GAS Supply Connection Line Voltage Field WiringElectrical Connections GAS Supply to Unit HeaterGAS Connection Leak CheckStart UP and Operation Unit START-UPAdjustments Service Ladder Diagram Optional Thermostat InstallationFlue and Chimney Repair PartsElectrical Failure to OperateParts List See Back page for Parts Ordering InformationFor Information Regarding Service Limited WarrantyParts Ordering Information Instrucciones DE USO Y Manual DEL Usuario Para SU SeguridadAdvertencia ContenidoEL Estado DE California Exige LAS Siguientes Advertencias Vista Posterior Dimensiones DE LAS Unidades MHU 50/MHUVista Superior DimensiónRequisitos CSA EN Canadá EnvíoRequisitos CSA EN EE. UU Instalaciones EN GarajeInstalación DEL Calentador Aire DE Combustión Y VentilaciónVentilación Requisitos Y Recomendaciones GeneralesVentilación Horizontal General Ventilación Horizontal Comercial Ventilación Horizontal ResidencialVentilación CON UNA Chimenea DE Mampostería Quitar LA Unidad DE UNA Ventilación ComúnVentilación Horizontal Instalación Residencial Conexiones Eléctricas Cableado DEL Inductor DE Voltaje DE LíneaEncendido Y Funcionamiento Conexión DE GASVerificación DE Fugas Encendido DE LA UnidadAjustes Mantenimiento Diagrama DE Escalones Instalación DEL Termostato OpcionalGAS DE Combustión Y Chimenea Soplador DE Aire DE CombustiónSistema Eléctrico Falla DE FuncionamientoLista DE Piezas VER AL Dorso LA Información Para Ordenar PartesInformación Para Realizar Pedidos DE Piezas SI Desea Obtener Información Acerca DE ReparacionesGarantía Limitada Guide D’UTILISATION ET Manuel DU Propriétaire Pour Votre SécuritéAvertissement Table DES MatièresAvertissement Général DE Danger Dimension DES Appareils MHU 50/MHU VUE EN PlanExigences CSA AUX É.-U Installations Dans UN GarageExpédition Exigences CSA AU CanadaAIR DE Combustion ET DE Ventilation Exigences ET Recommandations GénéralesVentilation Appareil DE Chauffage / Radiateur UtilitaireVentilation Horizontale Générale Ventilation Horizontale Commerciale Ventilation Horizontale Installation Résidentielle Ventilation Utilisant UNE Cheminée EN MaçonnerieRetrait DUN Appareil DE LA Ventilation Commune Raccordement À Lalimentation EN GAZ Connexions ÉlectriquesCâblage SUR Place À LA Tension DE Ligne Alimentation EN GAZ Vers Lappareil DE ChauffageDémarrage ET Fonctionnement Avertissement Raccordement AU GAZVérification DE Fuites DE GAZ Démarrage DE LappareilRéglages Entretien ET Réparation Diagramme EN Escalier Installation DU Thermostat EN OptionConduit DE Cheminée ET Cheminée Ventilateur DE Lair DE CombustionCircuit Électrique Lappareil NE Fonctionne PASListe DES Pièces 50 000 et 80 000 BTU F26016350 000 et 80 000 BTU F260164 Pour Plus D’INFORMATIONS Concernant L’ENTRETIEN Informations SUR LA Commande DE PiècesFournisseur DE Services Dentretien Qualifié Garantie Limitée
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