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MUH Series

Modular Unit Heaters

Dear Owner,

Congratulations!  Thank you for purchasing this new heater manufactured by Marley Engineered
Products.  You have made a wise investment selecting the highest quality product in the heating industry.
Please carefully read and follow the installation and maintenance directions shown in this manual.  You
should enjoy years of efficient heating comfort with this product from Marley Engineered Products... the
industry’s leader in design, manufacturing, quality and service.

... The Employees of
Marley Engineered Products

Read Carefully

These instructions are written to help

you prevent difficulties that might arise during installation

of heaters.  Studying the instructions first may save you

considerable time and money later.  Observe the following

procedures, and cut your mounting time to a minimum.

To reduce risk of fire or electric shock:

1.

To prevent electrical shock, disconnect all power coming to

heater at main service panel before wiring or servicing.

2.

All wiring must be in accordance with the National and  Local

Electrical Codes and the heater must be grounded as a pre-

caution against possible electric shock.

3.

Verify the power supply voltage coming to heater matches the

ratings printed on the heater name plate before energizing.

4.

This heater is hot when in use. To avoid burns, do not let bare

skin touch hot surfaces.

5.

Do not insert or allow foreign objects to enter any ventilation

or exhaust opening as this may cause an electric shock,

fire,or damage to the heater.

6.

To prevent a possible fire, do not block air intakes or exhaust

in any manner. Keep combustible materials, such as crates, 

drapes, etc., away from heater. Do not install behind door,

furniture, towels, or boxes.

7.

A heater has hot and arcing or sparking parts inside. Do not

use it in areas where gasoline, paint or flammable liquids are

stored.

8.

Use  this heater only as described in this manual. Any other

use not recommended by the manufacturer may cause fire,

electric shock, or injury to persons.

9.

This heater is not approved for use in corrosive atmospheres

such as marine, green house or chemical storage areas.

Installation & Maintenance Instructions

FILE #E21609

SAVE THESE INSTRUCTIONS

!

1

WARNING

Summary of Contents for MUH Series

Page 1: ...g must be in accordance with the National and Local Electrical Codes and the heater must be grounded as a pre caution against possible electric shock 3 Verify the power supply voltage coming to heater...

Page 2: ...ing heater The heater may be mounted for either vertical or horizontal discharge by the use of threaded rods Refer to Table 2 for threaded rod sizes required Observe the detailed procedures in the fol...

Page 3: ...ons are made 6 The power terminal block is equipped with box terminals sized to accept the correct size power supply wire Branch circuit wire rated min 600V 60 C is acceptable for heaters rated up to...

Page 4: ...ctor lead wire A1 must be moved from the end terminal of the power terminal block terminal clos est to the contactor or control terminal board to the A termi nal of the lower terminal block center ter...

Page 5: ...STATS SHOULD BE TREATED AS SINGLE STAGE ONLY 5 WARNING 1 Use min 600 volts NEC Class 1 insulated wire for all control circuit wiring 2 Use a crimp on type fork terminal on the wire ends that attach to...

Page 6: ...55 24 9 MUH252 89 40 4 MUH254 89 40 4 MUH308 30 265 8 113 4 89 40 4 504 in3 MUH302 76 2 676 4 298 5 89 40 4 8260 cm3 MUH304 89 40 4 MUH256 89 40 4 MUH306 89 40 4 MUH402 119 54 0 MUH404 119 54 0 MUH508...

Page 7: ...L OF THE UNIT DISCONNECT POWER BEFORE SERVICING IF EXTERNAL CONTROL IS USED ALSO DISCONNECT EXTERNAL POWER SUPPLY NE PAS RELEVER LES LAMES AU DEL A DU NIVEAU PREVU DE L APPAREIL METTRE HORS TENSION AV...

Page 8: ...IEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WHICH EXCEED THE AFORESAID EXPRESSED WARRANTIES ARE HEREBY DISCLAIME...

Page 9: ...calentador debe estar conectado a tierra como precauci n contra un choque el ctrico posible 3 Antes de activar verifique que el voltaje del suministro de potencia entrante al calentador corresponda a...

Page 10: ...descarga vertical u horizontal mediante el uso de varillas con rosca Refi rase a la Tabla 2 para los tama os de varilla con rosca requeridos Observe los proced imientos en forma detallada en las sigui...

Page 11: ...de terminales de la energ a se equipa de los termi nales de la caja clasificados para aceptar el alambre correcto de la fuente de alimentaci n del tama o El circuito minuto clasificado alambre 600V 60...

Page 12: ...a la par de los rel s contactores Mueva sola mente los dos cables marcados C1 y D1 en cada uno de esos blo ques de terminales tri f sicos a la terminal B No mueva o cambie ning n otro cable El modelo...

Page 13: ...el calentador Ejemplo MUH0581 24 amperos 4 En las unidades que si incluyen contactor interno 7 kW y mas refiere a la figura 5 para el diagrama electrico El alambre del circuito de control deber ser mi...

Page 14: ...0 4 MUH402 119 54 0 MUH404 119 54 0 MUH508 30 265 8 171 4 119 54 0 648 in3 MUH502 76 2 676 4 435 1 119 54 0 10620 cm3 MUH504 119 54 0 MUH406 119 54 0 MUH506 119 54 0 T T MT 1 MT 2 BLACK TO W1 RED TO R...

Page 15: ...SIANAS POR ENCIMA DEL NIVEL DE LA UNIDAD DESCONECTE ANTES DE REPARAR SI SE UTILIZA CONTROL EXTERNO TAMBIEN SE DEBE DESCONECTAR LA FUENTE DE ALIMENTACION EXTERNA NE PAS RELEVER LES LAMES AU DEL A DU NI...

Page 16: ...N DE ESTE ACUERDO TODAS LAS GARANTIAS IMPLICITAS DE COMERCIALIZACION Y APTITUD PARA UN FIN PARTICULAR QUE EXCEDAN LAS GARANTIAS PREVIAMENTE EXPRESADAS MARLEY ENGINEERED PROD UCTS NO SERA RESPONSABLE P...

Page 17: ...nsion d alimentation vers l appareil et la tension du circuit de commande arrivant au radiateur et aux accessoires correspondent aux valeurs nominales indiqu es sur la plaque signal tique du radiateur...

Page 18: ...reporter au tableau 2 pour conna tre les dimensions des tiges filet es requises Suivre les m thodes d taill es dans les instructions d installa tion suivantes Le radiateur peut aussi se suspendre au...

Page 19: ...TB de puissance est quip des bornes de bo te class es pour accepter le fil correct d alimentation d nergie de taille Le circuit la minute valu e par fil 600V 60 C de branche est acceptable pour des r...

Page 20: ...ontacteur A1 doit tre d plac de la borne d extr mit du bornier de puissance borne la plus proche du contacteur ou de la plaque bornes de commande vers la borne A du bornier inf rieur borne centrale Le...

Page 21: ...ERMOSTAT NIVEAU UNIQUE 21 AVERTISSEMENT 1 Utilisez les fils Class 1 de NEC isole pour 600V minimum pour le tout le c blage de circuit de commande 2 Utiliser une cosse sertir en forme de fourche sur le...

Page 22: ...504 in3 MUH302 76 2 676 4 298 5 89 40 4 8260 cm3 MUH304 89 40 4 MUH256 89 40 4 MUH306 89 40 4 MUH402 119 54 0 MUH404 119 54 0 MUH508 30 265 8 171 4 119 54 0 648 in3 MUH502 76 2 676 4 435 1 119 54 0 10...

Page 23: ...URN LOUVERS ABOVE LEVEL OF THE UNIT DISCONNECT POWER BEFORE SERVICING IF EXTERNAL CONTROL IS USED ALSO DISCONNECT EXTERNAL POWER SUPPLY NE PAS RELEVER LES LAMES AU DEL A DU NIVEAU PREVU DE L APPAREIL...

Page 24: ...TRES GARANTIES EXPLICITES OU IMPLICITES ET TOUTES LES GARANTIES IMPLICITES DE QUALIT MARCHANDE ET D ADAPTATION UN BUT PARTICULIER D PASSANT LES GARANTIES EXPLICITES SUS MENTIONN ES SONT REJET ES ET EX...

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