Ignition System Battery Installation - Mr. Heater MHVFRD20NGT Operating Instructions And Owner's Manual

PRODUCT FEATURES
Fan Blower
Switch*
(located on back of
heater)
Burners
Grill
Front Panel
*Blower not included on all units
SAFETY DEVICE
This heater has a pilot with an Oxygen Depletion Sensor
(ODS) safety shut off system. The ODS/pilot shuts off the
heater if there is not enough fresh air.
IGNITION SYSTEM / BATTERY INSTALLATION
PIEZO: The heater is equipped with an electronic manual
ignitor. This system requires no matches, batteries, or other
source to light heater but does require one AA battery to
operate ignitor.
To install or replace battery unscrew the ignitor cap (red
button), insert battery positive (+) terminal up and replace
cap. (AA Battery included)
THERMOSTATIC CONTROL
These heaters have a control valve with a thermostat
sensing bulb. This results in the greatest heater comfort
and may result in lower fuel bills.
BLOWER FAN CONTROL SWITCH OPERATION
On models equipped with an electrical blower, the blower
switch has three positions: MANUAL, OFF and AUTO. In
AUTO, the blower will turn on and off as the heater cycles
on and off. On MANUAL, the blower will run continuously.
To turn blower off, use the OFF position.
LOCAL CODES
Install and use heater with care.
Installation must conform to local codes or in the absences
of local codes, use the latest edition of National Fuel Gas
Code, ANSI Z223.1/NFPA 54.
UNPACKING
1. Remove heater from carton.
2. Remove all protective packaging applied to heater
for shipment.
3. Check heater for any shipping damage. If heater
is damaged, promptly inform dealer where you
bought heater.
Unvented Natural Gas Vent Free Room Heaters
Ignitor Button
Control Knob
Heater
Cabinet
Figure 1
FRESH AIR FOR COMBUSTION AND VENTILATION
WARNING: This heater shall not be installed in a confined
space or unusually tight construction unless provisions are
provided for adequate combustion and ventilation air. Read
the following instructions to insure proper fresh air for this
and other fuel-burning appliances in your home.
ESTABLISHING ADEQUATE VENTILATION
The following are excerpts from National Fuel Gas Code,
NFPA 54/ ANSI Z223.1, Section 5.3, Air for Combustion and
Ventilation. All spaces in homes fall into one of the three
following ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
This heater must not be installed in a confined space
or unusually tight construction unless provisions are
provided for adequate combustion and ventilation air. The
information on pages 4 and 5 will help you classify your
space and provide adequate ventilation.
Unusually Tight Construction
If your home meets all of the three following criteria you
must provide additional fresh air. See Ventilation from
Outdoors, page 5.
Unusually tight construction is defined as construction
where:
a. Walls and ceilings exposed to the outside atmosphere
have a continuous water vapor retarder with a rating
of one perm (6 x 10
openings gasketed or sealed and
b. Weather stripping has been added on operable windows
and doors, and
c. Caulking or sealants are applied to areas such as joints
around windows and door frames, between wall-
ceiling joints, between wall panels, at penetrations
for plumbing, electrical, and gas lines, and at other
openings.
If you home does not meet all of the three criteria above,
see Determining the Type of Heater Location Space, below.
Confined Space and Unconfined Space
The National Fuel Gas Code, NFPA 54/ ANSI Z223.1
defines a confined space as a space whose volume is less
than 50 cubic feet per 1,000 Btu per hour (4.8 m
of the aggregate input rating of all appliances installed in
that space, and an unconfined space as a space whose
volume is not less than 50 cubic feet per 1,000 Btu per
hour (4.8 m per kW) of the aggregate input rating of all
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appliances installed in that space. Rooms communicating
directly with the space in which the appliances are
installed*, through openings not furnished with doors, are
considered a part of the unconfined space.
*Adjoining rooms are communication only if there are
doorless passageways or ventilation grills between them.
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Installation Instructions and Owner's Manual
-11 kg per pa-sec-m 2 ) or less with
per kW)
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