Rheem Raypak MVB 1003A, Installation And Operation Manual

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If the heater needs to be secured to the ground, use the
hole pattern shown in Figure 5 , following local codes.
Additional clearance may be required when using the
factory anchor bracket.
Clearances
Indoor Installations
When installed according to the listed minimum clearances
from combustible construction, these heaters can still
be serviced without removing permanent structural
construction around the heater. However, for ease of
servicing, a clearance of at least 24 in. (610 mm) in front,
1 in. (25 mm) on the side, at least 24 in. (610 mm) on the
rear and 10 in. (254 mm) above the top of the heater is
required.
This will allow the heater to be serviced in its installed
location without movement or removal of the heater.
Service clearances less than the minimum may require
removal of the heater to service either the heat exchanger
or the burner components. In either case, the heater must
be installed in a manner that will enable the heater to
be serviced without removing any structure around the
heater.
Heater
Side
Min. Clearance
from Combustible
Surfaces**
in. (mm)
Minimum Service
Clearance
in. (mm)
Floor* 0 0
Rear 12 (305) 24 (610)
Right Side 1 (25) 1 (25)***
Left Side 1 (25) 1 (25)***
Top 0 10 (254)
Front Open 24 (610)
Vent 1 (25) 1 (25)
* DO NOT install on carpeting.
** Combustible clearances may be reduced by protecting the surface, as shown in
the National Fuel Gas Code. See Table 10.2.3.
*** 1" clearance on either side requires providing 12" service access on the
opposite side.
Table C. Clearances – Indoor Installations
4. INSTALLATION
Installation Codes
Installations must follow these codes:
• Local, state, provincial, and national codes, laws,
regulations and ordinances
• National Fuel Gas Code, ANSI Z223.1/NFPA 54 –
latest edition (NFGC)
• National Electrical Code, ANSI/NFPA 70 - latest
edition (NEC)
• Standard for Controls and Safety Devices for
Automatically Fired Boilers, ANSI/ASME CSD-1,
(CSD-1) when required
• For Canada only: CAN/CSA B149 Natural Gas and
Propane Installation Code and CSA C22.1 C.E.C.
Part 1 (C22.1)
Equipment Base
The heater should be mounted on a level, structurally
sound surface. The heater is approved for installation on
a combustible surface but must NEVER be installed on
carpeting. Gas-fueled equipment installed in enclosed
parking garages must be located at least 18 in. (457 mm)
above the floor.
A CAUTION: This heater should be located in an area
where water leakage will not result in damage to the area
adjacent to the appliances or to the structure. When such
locations cannot be avoided, it is recommended that
a suitable catch pan, adequately drained, be installed
under the appliance. The pan must not restrict air flow.
In addition, the heater shall be installed such that the gas
ignition system components are protected from water
(dripping, spraying, rain, etc.) during appliance operation
or service (circulator replacement, control replacement,
etc.).
31.88"
(81 cm)
0.56" (14 mm)
24.50"
(62 cm)
FRONT OF UNIT F10214
0.75"
(19 mm)
1.125"
(29 mm)
REAR OF UNIT
4 x 0.56" Ø
(14 mm)
Figure 5. Anchor Hole Locations