Use and Care Manual

Installation Instructions for RB-700-1 Recess Box

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’.

• 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.

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.

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.

Figure 2: Piping options.

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.

Figure 1: Discharge Vent Clearances.

For Model NR98OD (GQ-2857WX US)

Note: 1. Allow for drainage

from the pressure relief valve.

2. If condensing model, also allow for

drainage from condensate drain

connection.

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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.
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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.