Introduction; Parts Included; Warnings; Preparation - Bosch AQ4 Installation Manual

1 Introduction

1.1 Parts included

Vent Hood Kit
• 1 - 4" vent hood: VH1-4
• 4 - Exterior screws
• 1 - 5" to 4" vent reducer pipe
Vibration Mount Packet
• 2 - Vibration mounts with nuts and washers
• 2 - Brackets with nuts and washers
Flow Switch Packet
• 1 - Flow switch
• 4 - Replacement pipes (See chapter 2.7)
• 2 - Pipe clips
• 1 - Molex connector cable
• 1 - Heat exchanger bushing
Power vent motor
• 1 - Power vent motor (HSUL -1 Series containing
integrated 24v control circuit) including 25 foot
control cable with wire nuts and an HPN 6-foot
power cord
• 5 - Nylon ties

1.2 Warnings

1. Failure to install, maintain and/or operate the
power vent in accordance with manufacturer's
instructions may result in conditions which can
produce bodily injury and property damage.
2. The power vent must be installed by a qualified
installer in accordance with all local codes or, in
their absence, in accordance with the National
Fuel Gas Code (ANSI Z223.1 NFPA #54), the
National Electric Code, the Canadian Electrical
Code (C22.1), Canadian Gas Code (CSA B149.1)
and The Occupational Health and Safety Act
(OSHA) as applicable.
3. The power vent motor shaft must be mounted
horizontally to prevent motor bearing wear.
4. Disconnect power supply when making wiring
connections or when working around the fan
blade and motor. Failure to do so may result in
severe personal injury and equipment damage.
5. Make certain the power source is adequate for
the fan motor requirements. Do not add the
power vent to a circuit where the total load is
unknown.
AQ4 Motor is 200 watts- 1.66 amps @ 120vac.
6. Locate the outlet receptacle as close to the vent
motor as possible. Do not use an extension
cord.
AQ4 Manual
Warning: If the back draft flapper on the
vent hood does not close properly, it may
allow freezing air to come in contact with
the water heater's heat exchanger and
cause the heat exchanger to burst. Such
damage is not covered under the water
heater's warranty.

1.3 Preparation

1. Follow installation and operating instructions
manual supplied with the water heater.
2. Before mounting water heater to wall, check its
minimum clearance requirements.
3. When using an AQ4 the maximum vent length
from the water heater to the point of termination
is 25 feet with one elbow. Subtract 5 feet for
each additional 90° elbow (up to two additional
elbows allowed.)
4. Install power vent motor as close to the vent hood
as possible.
Introduction
3