Optional Direct Vent Terminations; Hard Water; Circulation Pumps; Insulation Blankets - State Water Heaters 301 Series Instruction Manual

Flammable items, pressurized containers or any other potential
fire hazardous articles must never be placed on or adjacent to
the water heater.
CLEARANCE TO COMBUSTIBLE MATERIALS
The water heaters covered in this manual are approved for
installation on combustible flooring. The clearance to combustible
and non combustible construction materials is zero inches on the
back and sides of the water heater. These water heaters are also
approved for installation in an alcove.
When the water heater is installed directly on carpeting, the water
heater shall be installed on a metal or wood panel extending
beyond the full width and depth of the water heater by at least
three inches (76.2 mm) in any direction or, if the water heater is
installed in an alcove or closet, the entire floor shall be covered by
the panel. The panel must be strong enough to carry the weight
of the heater when full of water.
Note: Adequate clearance for servicing should be
maintained on all installations. See
(page 12).
ALCOVE
WATER
HEATER
FRONT
FRONT VIEW
Figure 6. Clearances
SERVICE CLEARANCE
A service clearance of 24 inches (61 cm) should be maintained
from serviceable parts such as the T&P valve, control system
components, gas valve, clean out opening, drain valve, the vent
connection (exhaust/condensate elbow). Leave as much room as
possible above the water heater and near the exhaust elbow for
this reason. See (page 16).
Figure 8
INTAKE AIR AND VENT PIPE CLEARANCES
The minimum clearance from combustible materials for the vent
(exhaust) and intake air piping shall be 0 inches. Vent or intake
air piping passing through a combustible wall or ceiling must be
a continuous run (no joints).

OPTIONAL DIRECT VENT TERMINATIONS

The water heaters covered in this manual can be installed in a
direct vent configuration using optional concentric or low-profile
terminations. See
Concentric Termination Installation
and
Low-Profile Vent Termination installation
Concentric and low profile terminations must be ordered separately.
Contact your local distributor or call the parts department phone
number listed on the back cover of this manual to order.

HARD WATER

Where hard water conditions exist, water softening or the threshold
type of water treatment is recommended. This will protect the
dishwashers, coffee urns, water heaters, water piping and other
equipment. See
Maintenance
scale removal procedures.
Service Clearance
CLEARANCES TO COMBUSTIBLE
AND NON COMBUSTIBLE
CONSTRUCTION MATERIALS
0
0
0
FRONT
TOP VIEW
(page 31)
(page 34).
(page 63) for sediment and lime

CIRCULATION PUMPS

A circulating pump is used when a system requires a circulating
loop or there is a storage tank used in conjunction with the water
heater. The tank is provided with a 3/4" NPT recirculation loop
return connection. See
installation location of circulating pumps.
See
Circulation Pump Wiring Diagrams
hookup information. Install in accordance with the current edition
of the
National Electrical Code
, .
Code CSA C22.1
Stainless steel circulating pumps are recommended for use with
commercial water heaters.
Refer to the circulating pump manufacturer's instructions for its
operation, lubrication, and maintenance instructions.

INSULATION BLANKETS

Breathing Hazard - Carbon Monoxide Gas
Do not obstruct water heater air intake
with insulating blanket.
Gas and carbon monoxide detectors
are available.
Install water heater in accordance with
the instruction manual.
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
Insulation blankets are available to the general public for external
use on gas water heaters but are not necessary with these
products. The purpose of an insulation blanket is to reduce the
standby heat loss encountered with storage tank heaters. The
water heaters covered by this manual meet or exceed the
standards with respect to insulation and standby heat
Policy Act
loss requirements, making an insulation blanket unnecessary.
If you choose to apply an insulation blanket to this heater, you
should follow these instructions. See
(page 8) section of this manual for identification of components
mentioned below. Failure to follow these instructions can restrict
the air flow required for proper combustion, potentially resulting
in fire, asphyxiation, serious personal injury or death.
• DO NOT apply insulation to the top of the water heater,
as this will interfere with safe operation of the blower
assembly.
• DO NOT cover the control system LCD on top of the water
heater.
DO NOT cover the Temperature-Pressure Relief Valve.
•
DO NOT cover the instruction manual. Keep it on the side
•
of the water heater or nearby for future reference.
DO obtain new warning and instruction labels from the
•
manufacturer for placement on the blanket directly over
the existing labels.
• DO inspect the insulation blanket frequently to make
certain it does not sag, thereby obstructing combustion air
flow.
12
(page 69) for
Water Piping Diagrams
(page 68) for electrical
, or the
NFPA 70 Canadian Electrical
Features and Components
Energy