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Bosch WR400 K T2 Series Installation Operation & Maintenance

Instantaneous gas water heater
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Models
WR325 K...T1
WR400 K...T2
·
Installation
·
Operation
·
Maintenance
The Bosch instantaneous water heater is a high efficiency,
space saving answer to your water heating needs.
All Bosch instantaneous water heaters heat water only as
required; no energy is lost maintaining a large volume of
water at elevated temperatures as in tank-type storage water
heaters.
Suitable for heating potable water only. Not approved
for space heating purposes.
READ INSTRUCTIONS CAREFULLY BEFORE INSTALLING
NOTICE TO INSTALLER: Please leave this manual with
ASTRAVAN DISTRIBUTORS, LTD.
123 Charles Street
North Vancouver, BC. V7H 1S1
Phone Canada: (604) 929-5488
Phone USA:
(206) 860-8448
Web Site: www.astravan.com
Note: In case of problems please contact your salesman or installer.
Instantaneous gas water heater
the owner or affix adjacent to
appliance.
WARNING: If the information in this manual is not
followed exactly, a fire or explosion may result
causing property damage, personal injury or death.
-
Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
-
WHAT TO DO IF YOU SMELL GAS
-
Do not try to light any appliance
-
Do not touch any electrical switch; do not use
any phone in your building.
-
Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
-
If you cannot reach your gas supplier, call the
fire department.
-
Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.

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  Summary of Contents for Bosch WR400 K T2 Series

  • Page 1 · Operation · Maintenance The Bosch instantaneous water heater is a high efficiency, space saving answer to your water heating needs. All Bosch instantaneous water heaters heat water only as required; no energy is lost maintaining a large volume of water at elevated temperatures as in tank-type storage water heaters.
  • Page 2 DIMENSIONS Figure 1 Maximum hydrostatic water pressure – 1.03 Mpa (150 p.s.i.) Maximum recommend working pressure – 0.69 Mpa (100 p.s.i.) Minimum working pressure – 0.0138 Mpa (2 p.s.i.) at 2 Litres/min. (0.5 U.S. Gallons/min) free discharge Minimum recommended inlet water pressure for use with showers 40 p.s.i.g. Dimensions in Milimetres (inches) Model diam.
  • Page 3: Installation Instructions

    FOREWORD This design complies with CAN1-4.3-77 and ANS1Z21. 1 0.3b The BOSCH instantaneous gas water heater is designed 1994 as an instantaneous gas water heater. In addition the to operate on natural or propane gas; however make sure unit complies with CAN1-2. 1 7- M80 use at high altitude, that gas on which heter is to operate is the same as specified 2.000- 4.500 feet above sea level.
  • Page 4 For either a confined or unconfined space in a building of of 305 mm (12 inches) shall be allowed for maintenance of tight construction with inadequate infiltration, air must be serviceable parts.Clearence from vent is dependent upon drawn from the outdoors or from spaces that freely the clearence rating of the venting material used, that is, communicate with the outdoors.
  • Page 5: Water Connections

    1 and figure 5, below. VENTING The BOSCH instantaneous water heaters have built-in draft diverters and are designed for indoor installation only. The draft diverter outlet must be connected to a clear, unobstracted vent of the same size, or larger, refer to: •...
  • Page 6: Relief Valve

    3.45 kPa (1/2 psig). If overpressure has occurred such as through improper testing of the gas lines or BOSCH water heaters are shipped from the factory with emergency malfunction of the supply system, the gas valve the gas pressure regulators preset for the gas shown on the and regulator must be checked for safe operation.
  • Page 7: Lighting Instructions

    OPERATING INSTRUCTIONS WARNING! LIGHTING INSTRUCTIONS If the water heater has been damaged or exposed to fire or 1. STOP! Read the safety information, first section of the sooting, or if any part has been underwater, do not use. Lighting Instruction Plate on the cover. Immediately call a qualified service technician to inspect 2.
  • Page 8 PRESSURE REGULATION TEMPERATURE REGULATION The pressure regulator supplied with the water heater is The BOSCH WR325 K and WR400 K are wall mounted, adjusted to operate on the gas specified on the rating plate, high efficiency, thermostatically controlled instantaneous gas and: water heaters designed to provide approximately 60º...
  • Page 9: Preventive Maintenance

    PREVENTIVE MAINTENANCE PILOT AND MAIN BURNER If the main burners fail to exhibit they must be cleaned, either by blowing them off with compressed air or by washing Check pilot and main burners at least every 12 months for them in soap and water and rinsing. proper flame characteristics.
  • Page 11 Part Number for Models Nº Description WR325 K…T1 WR400K…T2 1 Front shell 8705401618 8705411262 2 Cover 8703304011 8703304011 3 Washer 3/4" 8710103043 8710103043 4 Draught diverter 8705505307 8705505354 5 Heat exchanger 8705406132 8705406189 6 Connecting pipe hot 8700705431 8700705431 7 Cold water pipe 8700705294 8700705294 8 Washer 1/2"...
  • Page 13: Pour Votre Securite

    WR 400 K…T2 · Installation · Fonctionnement · Entretien Le chauffe-eau instantané BOSCH est la réponse pour haute éfficacité dans un espace restreint en satisfaisant tout vos besoin d’eau chaude. Tous les chauffes- eaux instantanés Bosch chauffent seulement la quantité d’eau sur demande sans dépenser de l’énergie pour maintenir la...
  • Page 14 Dimensions Figure 1 Pression maximum hydrostatique de l’eau - 1.03 MPa ( 150 lb / po ca. Pression maximum d’opération recommander - 0.69 MPa (100 lb / po ca) Pression minimum d’opération - 0.0138 MPa (2.0 lb/po ca) at 2 L/min (0.5 U.S. gal/min) Modèle WR325 17 1/4...
  • Page 15: Instruction D'installation

    AVERTISSEMENT AU LECTEUR Les caractérisques des chauffe- eau à gaz instantanés de Le chauffe- eau à gaz instantané BOSCH est conçu de modèles WR325 K et WR400 K sont conformes au normes sorte à pouvoir être adapté au propane ou au gaz naturel.
  • Page 16: Montage

    Soit un espace libre ou restreint dans un bâtiment de Au Etats-Unis Le WR 325 et le WR400 son de conceptions certifié pour construction étroite avec une infiltration insuffisante, l’air l’installation sur un mur de construction combustible (pour doit être tiré de l’extérieure ou d’espaces qui communique avec le plein air.
  • Page 17 Figure 3 VENTILATION Les chauffes- eaux instantané BOSCH sont construit avec un directeur du tirage d’air et sont conçuent pour l’usage à l’intérieure seulement. Le directeur du tirage d’air doit être raccordé à un évent de la même grandeur ou plus grand propre de tout debris, référer à...
  • Page 18: Raccords De Gaz

    C.G.A. . ou moins que 3.45 kPa (1/2 Lb/po.ca.) Les chauffes- eaux BOSCH sont expédier de l’usine avec Le chauffe-eau, y compris le régulateur de pression et le robinet manuel fourni, ne doivent pas fonctionner à une le régulateur de pression à...
  • Page 19: Instruction De Fonctionnement

    INSTRUCTION DE FONCTIONNEMENT AVERTISSEMENT INSTRUCTIONS D’ALLUMAGE Si le chauffe-eau était endommager ou exposer au feu ou à 1. Arrêtez! Lire les informations du sécurité, première partie la suie, ou que l’une de ces pièces était sous l’eau, ne pas des instructions d’allumage sur le couvert. utiliser.
  • Page 20 REGULATION DE TEMPERATURE Figure 9 Le BOSCH WR 325 K et WR 400 K sont montable au mur, très efficaces et sont contrôlés au thermostat et conçuent pour fournir approximativement une température d’eau de 60ºC (140ºF) et un débit minimum de 2 litres/min...
  • Page 21 L’ENTRETIEN PREVENTIF TEMOIN ET BRULER PRINCIPAL S’y il faut laver le brûleur principale, suiveur les procédures Vérifier le témoin et les brûleurs principaux au moins à cha- suivantes : que 12 mois pour le bon fonctionnement de la flamme. 1. Fermer l’alimentation de gaz au chauffe-eau. Le témoin doit couvrir environ 10mm (3/8 pouce) sur le 2.
  • Page 23 Numéro de pièce pour les modèles Nº Description WR325 K…T1 WR400K…T2 1 Habillage 8705401618 8705411262 2 Couvercle 8703304011 8703304011 3 Joint 3/4" 8710103043 8710103043 4 Anti-refouleur 8705505307 8705505354 5 Corps de chauffe 8705406132 8705406189 6 Tuyauterie chaud 8700705431 8700705431 7 Tube arrivée eau 8700705294 8700705294 8 Joint 1/2"...

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Wr325 k t1 series