Noritz America RB-700-1 Installation Manual

Installation Instructions for RB-700-1 Recess Box

For Model NR98OD (GQ-2857WX US)

1) Determine the installation location.

• The recess box should be installed so the discharge vent maintains the minimum

allowable clearances as required by the local authority. Where no local requirement
exists, maintain the following minimum suggested clearances from building openings
as shown in Figure 1:

4’ below, 4’ horizontally from, or
1’ above any door, operable window,
or gravity air inlet into any building.
3’ above any forced air inlet within 10’.

4'

4'

• Follow all other installation requirements

as outlined in the Installation Manual.

Note: Top, front, and side clearances noted
on the front cover of the water heater are not
applicable when installed in a recess box.

Warning

This recess box has been designed to be mounted in a wall cavity. Do not attempt to mount the recess box
in another configuration (i.e. outside wall, free standing, etc.). Damages resulting from an improper installation
will not be covered by the Noritz America Limited Warranty.

2) Construct the framing.

• Prepare an opening for the recess box to

the following approximate dimensions:
40” (height) x 14-1/2” (width) x 10-1/4” (depth)

Note: The recess box is approved
for zero clearance to combustibles.

1'

3'

Figure 1: Discharge Vent Clearances.

3) Prepare the recess box.

• Drill 3 holes in the recess box

to accommodate the water and
gas lines. Suggestions for the
holes are shown in Figure 2.
Additional holes for running
the electrical and remote
controller wires will be
needed as well.

Note: 1. Allow for drainage
from the pressure relief valve.

2. If condensing model, also allow for
drainage from condensate drain
connection.

Figure 2: Piping options.

4) Install the recess box.

• Attach the recess box to the framing using

suitable screws on all 4 sides of the box.

5) Install the heater.

• First, install one of the supplied mounting screws

in the top recess box bracket leaving about 1/4”
clearance between the bracket and screw.

• Second, insert the water heater into the box

by sliding the top heater bracket over the previously
installed mounitng screw as shown in Figure 3.

• Finally, install the 2 remaing mounting screws

in the lower recess box brackets and tighten all 3
screws to secure the heater (see Figure 4).

6) Make connections.

• Connect water, gas, and electrical

connections as outlined in the
Installation Manual.

7) Seal the Recess Box.

• Using silicone, seal around the outer edges

of the box as well as around any penetrations
made to prevent water leakage.

Note: The lower, inner edges of the box have
been pre-sealed. If these seals are damaged,
reseal them using silicone.

8) Replace the Recess Box Cover.

• After confirming the heater is operating

correctly, replace the front cover of the recess
box as shown in Figure 5.

Figure 3: Location of
top mounting bracket.

Figure 4: Location of
lower mounting brackets.

Figure 5: Completed installation.

Warning

Do not use the recess box for storage. Using the box
for other than its intended use can pose a fire hazard.

NORITZ AMERICA CORPORATION

11160 GRACE AVENUE, FOUNTAIN VALLEY, CA 92708 TEL: 1-866-7NORITZ www.noritz.com

Rev. 10/17