John Wood Commercial - AJWS - Manual (Page 4)

require insulation of the water piping and drain piping to
protect against freezing. The drain and controls must be
easily accessible for operation and service. Maintain
proper clearances as specified on the data plate.
• The operation of air-moving devices such as exhaust
fans, ventilation systems, clothes-dryers, fire-places, etc.,
can affect the proper operation of the water heater. Note:
Special attention must be given to the location of these
devices and the conditions they may create. Flow rever-
sal of flue gases may cause an increase of carbon
monoxide inside of the dwelling.
Important: Air for combustion and ventilation must not
come from a corrosive atmosphere. Any failure due to cor-
rosive elements in the atmosphere is excluded from war-
ranty coverage.
The following types of installation (but not limited to the fol-
lowing) will require outdoor air for combustion due to chem-
ical exposure, and may reduce but not eliminate the pres-
ence of corrosive chemicals in the air:
• Beauty shops
• Photo processing labs
• Buildings with indoor pools
• Water heaters installed in laundry, hobby or craft rooms
• Water heaters installed near chemical storage areas
Clearances and Accessibility
Notice: Minimum clearances from combustible materials
are stated on the data plate located on the front of the water
heater.
• If the water heater is installed in a restaurant or food serv-
ice location where the floor is cleaned frequently, NSF
International requires the water heater to maintain
152mm (6 in) of clearance above the floor. To comply with
the NSF International requirement, install leg extension
kit. For availability contact 1-888-479-8324
• The water heater is certified for installation on a com-
bustible floor.
4
Vapours from flammable liquids will
explode and catch fire causing death or
severe burns.
Do not use or store flammable products
such as gasoline, solvents or adhesives in
the same room or area near the water heater.
Keep flammable products:
1. far away from heater;
2. in approved containers;
3. tightly closed; and
4. out of children’s reach.
This water heater has a main burner and an
automatic ignition system. The ignition sys-
tem:
1. can come on at any time; and
2. will ignite flammable vapours.
Vapours:
1. cannot be seen;
2. are heavier than air;
3. go a long way on the floor; and
4. can be carried from other rooms to the
water heater by air currents.
Do not install this water heater where flam-
mable products will be stored.
WARNING
FLAMMABLE VAPOURS
Important:
The water heater should be located in an area where leak-
age of the tank or connections will not result in damage to
the area adjacent to the water heater or to lower floors of
the structure. Due to the normal corrosive action of the
water, the tank will eventually leak after an extended
period of time. A suitable metal drain pan should be
installed under the water heater as shown below, to help
protect the property from damage which may occur from
leaks in the piping connections or tank. The pan must limit
the water level to a maximum depth of 45mm (1 3/4 in) and
be 50mm (2 in) wider than the water heater and piped to an
adequate drain. The pan must not restrict combustion
airflow. Locate the water heater near a suitable indoor
drain. Outside drains are subject to freezing temperatures
which can obstruct the drain line. The piping should be at
least 19mm (3/4 in) ID and pitched for proper drainage.
Under no circumstances will the manufacturer or seller of
this water heater be held liable for any water damage which
is caused by your failure to follow these instructions.
FLAMMABLES
1 3/4” Max
Pipe to
adequate
drain
At least 2” greater than the
diameter of the water heater
Pipe to
adequate
drain
45mm max.
(1¾ in)
At least 50mm (2 in) greater than
the diameter of the water heater.