5
Do not attempt to pry any panel off.
If applicable, the Normally-Open dry contacts in the low water
cut-off (LWCO) are to be wired into the appropriate terminals on
the control board. Locate the probe type LWCO in the piping
above the highest point of the water heater. In all cases check
with local codes.
2.2
– Mechanical Environment
Install this appliance in a clean, dry location with adequate air
supply.
Due to low jacket losses from the appliance,
temperatures in a typical mechanical room may be significantly
colder than the rest of the structure. In cases where combustion
air is being supplied into the mechanical room, the temperature
may be below freezing. Supplemental heat is sometimes
required to maintain ambient temperature at acceptable levels
and prevent freezing of various system components.
The mechanical room
MUST NOT
be used to store corrosive or
flammable chemicals, such as gasoline or paint thinner, which
may be harmful to the water heater, or contaminate the
combustion supply air. Such chemicals must not be
stored in the
vicinity of this appliance, the vent termination, or combustion air
intake, or any location from which fumes could reach the
appliance, the vent termination, or combustion air intake. Chillers
or other equipment utilizing refrigerant should also not be
installed in the same mechanical room as fuel burning
appliances.
In cases where the mechanical environment is a concern, the
water heater
should be installed as a “sealed combustion”
appliance, with combustion supply air connected directly to the
blower. Please contact the factory for more information on this
installation method.
2.2.1
– Freeze Protection
Freezing is less of a concern with a tank type water heater than
with some other equipment, as the unit will fire when the stored
water volume begins to cool. However, since the unit can be
manually deactivated, installations are still not recommended in
areas where the danger of freezing exists. Proper freeze
protection (i.e. a supplemental heat source dedicated to the
mechanical space) must be provided for appliances installed in
unheated mechanical rooms or where temperatures may drop to
the freezing point or lower. If freeze protection is not provided for
the system, a low ambient temperature alarm is recommended
for the mechanical room. Damage to the appliance by freezing is
not covered under warranty.
Water heaters must be located in a room with a consistent
temperature of at least 50ºF (10ºC).
CAUTION
A mechanical room operating under a negative pressure may
experience a downdraft in the flue of an appliance that is not
firing. The cold outside air may be pulled down the flue and
freeze a heat exchanger. This condition must be corrected to
provide adequate freeze protection.
Appliance installations are not recommended outdoors in areas
where danger of freezing exists. Precautions can be taken to
protect the appliance from damage.
If for any reason, the unit is to be shut off where danger of
freezing exists, the following precautionary measures must be
taken:
Shut off gas supply
Shut off water supply
Shut off electrical supply
Drain the water heater and connecting piping completely.
2.3
– Locating the Equipment
The appliance should be located close to a floor drain in an area
where leakage from the appliance or connections will not result
in damage to the adjacent area or to lower floors in the structure
.
Under no circumstances is the manufacturer to be held
responsible for water damage in connection with this unit, or any
of its components. The appliance must be installed so that the
ignition system components are protected from water (dripping,
spraying, etc.) during appliance operation and service (circulator
replacement, control replacement, etc.).
If the appliance is installed above the level of the building’s
distribution system, a low water cut-off device may be required
above the heat exchanger inlet/outlet connections.
Some local
codes require the installation of a low water
cut-off
on all
systems. Please check with the authority having jurisdiction.
Appliances located in a garage and in adjacent spaces that open
to the garage and are not part of the interior space must be
installed so that all burners and burner ignition devices have a
minimum clearance of not less than 18" (46cm) above the floor.
The appliance must be located or protected so that it is not
subject to physical damage by a moving vehicle.
DO NOT
install this appliance in any location where
gasoline
or flammable vapors are likely to be present.
If the appliance is to be installed near a corrosive or
potentially corrosive air supply, the appliance must be
isolated from it and outside air should be supplied as per
code. Potentially corrosive atmospheres will result from
exposure to permanent wave solution, chlorinated waxes and
cleaners, chlorine, water softening chemicals, carbon
tetrachloride, halogen based refrigerants, Freon cleaning
solvents, hydrochloric acid, cements and glues, masonry
washing materials, antistatic fabric softeners, dry cleaning
solvents, degreasing liquids, printing inks, paint removers,
etc.
DO NOT
install this appliance on top of carpet flooring. The
appliance must be installed on a level floor. Maintain required
clearances from combustible surfaces.
Every VTech is designed for either indoor installation, where they
are protected from exposure to wind, rain and weather, or
outdoor installation (by using special kit). Always consider the
use of a shelter such as a garden shed in lieu of direct exposure
of the appliance to the elements when installed outdoors. The
additional protection afforded by the shelter will help to minimize
nuisance problems with electrical connections and will allow
easier servicing of the appliance under severe weather
conditions.
2.4
– Clearances
This appliance is suitable for alcove (a closet without a door)
installation with minimum clearances to combustibles as follows:
