Rheem AP13945-2 - Manual (Page 16)

NOTICE: Do not apply
heat to the HOT or COLD
water connections. If sweat
connections are used, sweat
tubing to adapter before
fitting adapter to the water
connections on heater. Any
heat applied to the water
supply fittings will
permanently damage the
internal components of the
water heater.
Mounting the Water Heater
Make sure the location of the appliance
allows for easy access and operation.
Wall studs should be utilized when
mounting the water heater to the wall.
Alternately, a suitable piece of wood may
be placed inside or outside of the wall to
span the distance between the wall studs.
Fasten the water heater mounting brackets
to the wood.
In case of dry wall or concrete wall use
dry wall anchors or lag bolts.
The water heater requires 120VAC/60Hz.
Have a receptacle with ground terminal
near the water heater. The length of the
power supply cord is 10 feet (3 m).
Install a wood screw for the upper bracket
with a clearance of 1/8” (.32 cm) between
the wall and the screw head. Hang the
center of the upper bracket on the screw.
Using a wood screw and a washer, affix
the lower bracket to the wall (Left and
Right). Repeat to affix the top bracket.
The brackets can be adjusted to change
the distance between the back of the
appliance and the wall within the range of
3/8” (.95 cm) to 1½” (3.8 cm).
Loosen the adjustment screws of both the
top and the bottom brackets to adjust the
distance. (See Figure below)
Upper Bracket Wood Screw
Washer
Wood Screw
Washer
Washer
Wood Screw Lower Bracket
1/8" (.32 cm)
Clearance
CAUTION:
Reinforcement of the wall is
required in case the wall is
not strong enough to hold
the appliance.
!
16
Installing the water heater.
Water Supply Connections
Plumbing should be carried out by a
qualified plumber in accordance with
local codes.
Use approved plumbing materials only.
The diameter of the pipe lines should be a
minimum of 3/4”.
To conserve energy and to prevent
freezing, insulate both cold and hot water
supply lines. DO NOT cover the drain or
pressure relief valve.
To ensure proper operation of the water
heater, the following water pressure
guidelines should be followed:
●
Operation of the water heater requires
the minimum water pressure of 14 psi
(97 kPa) and a minimum water flow
rate of 0.66 gpm (2.5 lpm).
●
A water pressure of 40 psi (276 kPa) is
required to achieve maximum flow rate.
●
To maintain proper performance, ensure
sufficient water supply pressure. The
Required Water Pressure = Min.
Operating Water Pressure
(14 psi) (97 kPa) + Pipe Pressure Loss
+ Faucet and Shower Pressure Loss +
Safety Margin (more than 5 psi)
(34 kPa).
Combustion Air
This is a direct vent appliance and the air
intake pipe must be piped directly to the
appliance from the outside of the building.
The system will not operate if there is
excessive restriction (pressure drop) in the
venting system. See table on the left for
maximum length of air intake pipe. The
air intake pipe must be connected to
Rheem approved vent termination kit. The termination should be installed at an
angle running downward to prevent rain
water, snow, or condensate from entering
the water heater.
Notice: A 4” diameter Stainless steel,
PVC Schedule 40 or flexible aluminum
duct material can be used as air intake
pipe.
Bracket
Bracket
Adjustment Screws
Adjustment Screws
TOP
BOTTOM
Air Inlet pipe for direct
vent models.
Number of
90° elbows
(bends)
Maximum
length of
straight pipe.
2
47´ 6”
(14.4 m)
3
42´ 6”
(13 m)
4
37´ 6”
( 11.4 m)
For plastic and flex aluminum pipes see instruction sheet provided with the kit or
contact a qualified service technician, your installer or the customer service line of the
manufacturer.