LP-325 Rev. 009 Rel. 004 Date 12.2.20
10
24" MIN.
CLEARANCE
CLEARANCE
5" MIN.
0" MIN .
CLEARANCE
CLEARANCE
24" MIN.
0" MIN .
TOP VIEW
FRONT VIEW
CLEARANCE
LP-325-M
04/05/11
PLUS 2" MINIMUM
DIAMETER OF WATER HEATER
06/28/10
LP-179-W
TO OPEN DRAIN
LINE SHOULD BE AT
LEAST 3/4" ID AND
PITCHED FOR PROPER
DRAINAGE.
MAXIMUM 2"
Figure 1 - Recommended Service Clearances and Drain Pan Dimensions
NOTE:
If you do not provide the minimum clearances shown in Figure
1 it might not be possible to service the appliance without removing
it from the space.
NOTE:
A combustible door or removable panel is acceptable front
clearance.
All appliances eventually leak. Locate the tank where any leakage
from the relief valve, related piping, tank, or connections will not
result in damage to surrounding areas or lower floors of the building.
Any drain back tank should be installed in such a manner that if it
should leak the resulting flow of water will not cause damage to the
area in which it is installed. National Plumbing codes require a drain
pan for any appliance installation. This drain pan should be sized with
a maximum depth of 2”, and a minimum diameter 2” greater than the
diameter of the appliance. The drain pan should empty into an open
drain line. This drain line should be 3/4” ID minimum, piped to an
open drain. Leakage damages ARE NOT covered by warranty. Failure
to install a drain pan is the sole responsibility of the owner and/or
installer. Reference UPC 2000 (Uniform Plumbing Code) Section 510
- Protection from Damage or IPC 200 (International Plumbing code)
Section 504 - Safety Devices. Leakage damages ARE NOT covered by
warranty.
In addition, water leak detection devices and automatic water
shutoff valves are readily available at plumbing supply houses. IT IS
HIGHLY RECOMMENDED BY THE MANUFACTURER TO INSTALL WATER
LEAK DETECTION DEVICES AND AUTOMATIC SHUTOFF VALVES IN
ANY DRAIN BACK TANK INSTALLATION WHERE A LEAKAGE OF WATER
COULD RESULT IN PROPERTY DAMAGES.
WARNING
!
Appliance Area Ventilation Air Openings - Closet Installations
If the appliance is installed in a closet or alcove the appliance area/
room must be ventilated.
EXCEPTION:
If the appliance area/room has a volume of 150 ft
3
or
greater, ventilation of the appliance area/room is not required.
Each ventilation air opening must meet the minimum requirements
of 1 in
2
per 1000 BTU/hr., but not less than 100 in
2
. The lower ven-
tilation opening must be located within 6 in. of the floor, while the
upper opening must be located 6 in. from the top of the space.
If the appliance area has a volume less than 150 ft
3
, it is considered
a Closet or Alcove. In the US/Canada, PVC vent pipe and fittings
SHALL NOT BE USED within the closet or alcove. Only approved
CPVC, Polypropylene, or Stainless Steel vent pipe and fittings may
be used. See Table 6 for a list of approved materials. Under all
circumstances proper ventilation must be provided.
The space must be provided with correctly sized combustion/
ventilation air openings for all other appliances located in the
space with the appliance. For power venting installations using
room air for combustion, refer to the appliance venting section,
this manual, for descriptions of confined and unconfined spaces.
Do not install the appliance in an attic. The appliance cover must
be securely fastened to prevent the appliance from drawing air
from the appliance room. This is particularly important if the
appliance is in a room with other appliances. Failure to comply with
the above warnings could result in substantial property damage,
severe personal injury, or death.
Alcove Installations
Alcove installations have the same minimum dimensions as closet
installations, except the installation must be completely open to the
room at a distance no greater than 18 in. (457 mm) from the front
of the appliance and the room must be at least three (3) times the
size of the alcove. Provided these conditions are met, the appliance
requires no extra ventilation air openings to the space. If these con-
ditions are not met, follow the requirements for Closet Installations.
Precautions
If the appliance is located in a residential garage, per ANSI Z223.1:
• Install the appliance burner and ignition devices a minimum
of 18” above the floor of the garage. This will ensure the
burner and ignition devices are well off the floor.
• When raising the appliance ensure the entire bottom and
fully filled weight of the appliance are fully supported.
• Locate or protect the appliance so it cannot be damaged by
a moving vehicle.
D. Residential Garage and Closet Installations
Check with your local Authority Having Jurisdiction for
requirements when installing the appliance in a garage or closet.
Please read the entire manual before attempting installation.
Failure to properly take factors such as venting, piping, condensate
removal, and wiring into account before installation could result in
wasted time, money, and possible property damage and personal
injury.
C. Clearances for Service Access