Heatmaster HM2-RO-18, HM2-RO-24, HM2-RO-33, HM2-SO-18, HM2-SO-24 Installation And Operating Instructions Manual
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UNVENTED (GAS LOG) ROOM HEATER
INSTALLATION AND OPERATING INSTRUCTIONS
This heater is equipped with a PILOT LIGHT SAFETY SYSTEM designed to turn off the heater
if not enough fresh air is available.
Models HM2-MAN, HM2-T and HM2-MIL-18”, 24” and 33” Burner Units
with HM2-RO and HM2-SO Log Sets
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other
appliance.
WHAT TO DO IF YOU SMELL GAS
+ Do not try to light any appliance.
+ Do not touch any electrical switch; do not use any phone in your building.
+ Immediately call your gas supplier from a neighbor’s phone. Follow the gas
supplier’s instructions.
+ If you cannot reach your gas supplier, call the fire department.
Installation and service must be performed by a qualified installer, service agency or the gas supplier.
WARNING: Improper installation, adjustment, alteration, service or
maintenance can cause property damage, personal injury or loss of life. Refer to
this manual for information. Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
16-1010 (04/01)
This is an unvented gas-fired heater. It uses air (oxygen) from the room
in which it is installed. Provisions for adequate combustion and
ventilation air must be provided. Refer to page 5 of these instructions.
This appliance is for supplemental heating only. It should not
be used as a primary heat source for a dwelling.
DO NOT TAMPER WITH PILOT LIGHT SAFETY SYSTEM
WARNING: If the information in this manual is not followed exactly, a fire or explosion
may result causing property damage, personal injury or loss of life.
WARNING!
When used without fresh air, heater may give off CARBON MONOXIDE, an
odorless poisonous gas.
This heater is equipped with a PILOT LIGHT SAFETY SYSTEM designed to turn off the heater if not
enough fresh air is available.
If heater shuts off, do not relight until you provide fresh air.
If heater keeps shutting off, have it serviced by a qualified installer, service agency or the gas supplier.
Keep burner and control compartment clean.
2
IMPORTANT: BEFORE BEGINNING INSTALLATION
READ COMPLETE INSTRUCTIONS
CAREFULLY.
DO NOT TAMPER WITH PILOT LIGHT SAFETY SYSTEM
WARNING
+
Before installing in a solid fuel burning fireplace, the chimney flue and firebox must be cleaned
of soot, creosote, ashes and loose paint by a qualified chimney installer.
+ This appliance is for installation only in a solid-fuel burning fireplace or approved ventless
firebox enclosure.
+ Do not allow fans to blow directly into the fireplace. Avoid any drafts that alter the burner flame
patterns.
+ Do not use a blower insert, heat exchanger or other accessory not approved for use with this
burner.
ATTENTION INSTALLER:
REVIEW AND LEAVE THESE INSTRUCTIONS WITH CUSTOMER FOR FUTURE
REFERENCE.
3
WARNING: This appliance is for installation only in a solid-fuel burning fireplace or approved
ventless firebox enclosure.
+ Do not use this room heater if any part has been under water. Immediately call a qualified
service technician to inspect the room heater and to replace any part of the control system
and any gas control which has been under water.
+ Early signs of carbon monoxide poisoning resemble the flu, with headache, dizziness and/or
nausea. If you have these signs, heater may not be working properly. Get fresh air at
once! Have heater serviced.
+ Some people - pregnant women, persons with heart or lung disease, anemia, those under
the influence of alcohol and those at high altitudes are more affected by carbon monoxide
than others.
+ WARNING: When used without fresh air, heater may give off CARBON MONOXIDE, an
odorless poisonous gas.
+ If heater shuts off, do not relight until you provide fresh air.
+ If heater keeps shutting off, have it serviced. Keep burner and control compartment clean.
WARNING
A. Due to high surface temperatures, the appliance should be located out of traffic and away
from furniture and draperies.
B. Children and adults should be alerted to the hazard of high surface temperature and should
stay away to avoid burns or clothing ignition.
C. Young children should be carefully supervised when they are in the same room as the
appliance.
D. Adults must be present at all times while operating this appliance.
E. Do not place clothing or other flammable material near the appliance.
F. Do not leave this appliance operating while unattended or while occupants are sleeping.
G. Any safety screen or guard removed for servicing the appliance must be replaced prior to
operating the appliance.
H. Installation and repair should be done by a qualified service person. The appliance should be
inspected before use and at least annually by a professional service person. More frequent
cleaning may be required due to excessive lint from carpeting, bedding material, etc. It is
imperative that control compartments, burners and circulating air passageways of the
appliance be kept clean.
I. Any change to this heater or its controls can be dangerous.
IMPORTANT INFORMATION
+ This appliance is design certified by CSA International under the ANSI Z21.11.2b-1998
Unvented Heaters, ANSI Z21.60-1996 CGA 2.26-M96, Decorative Appliances
for Installation in Solid-Fuel Burning Fireplaces. ANSI Z21.60-1996 CGA 2.26-M96
only applies to manual and millivolt control valve units and does not apply to
thermostat control units. State or local codes may only allow operation of this
appliance in a vented configuration. Check your state or local codes.
+ This appliance must have a fireplace screen in place while the appliance is operating
and, unless other provisions for combustion air are provided, the screen shall have an
opening(s) for introduction of combustion air.
+ The flue damper in an existing vented solid-fuel burning fireplace must be closed at all
times when operated as an unvented room heater.
+ No solid-fuels shall be burned in a fireplace where an unvented room heater is
installed.
+ This appliance must not be installed in a bedroom, bathroom or any room where an
occupant could possibly be sleeping.
+ Always have glass fireplace doors open completely and have fireplace screen closed
when operating this appliance.
+ When installing this appliance in a fireplace with a mantle, always follow guidelines
listed in the Installation Clearances section of this brochure.
+ If a hood is required to be installed on your fireplace due to mantle clearances,
contact your dealer or HEATMASTER, INC. for availability of the hood.
Any outside air ducts and/or ash dumps in the fireplace shall be
permanently closed at the time of the appliance installation.
4
WARNING
+
This room heating appliance is factory designed to produce a flame having a clean and
virtually transparent appearance. If at any time the appliance begins to appear
abnormal due to excessive yellow flames, noticeable odor, or any carbon deposits on
the logs, immediately turn the appliance to the “OFF” position and contact a
qualified service technician or the gas company.
+ While operating this appliance using propane (LP) gas, the flame burning
characteristics may vary as the gas level in the LP tank approaches empty or less than
¼ full.
+ Unvented gas logs are intended for supplemental heat and are not to be used as a
primary heating source. When operated for an extended period of time this room
heating appliance can produce moisture that could create condensation, requiring
additional ventilation to the home. (EXAMPLE: Partially open a window, partially
open the fireplace vent, if applicable.)
+ Do not remove from this unit any of the attached metal plates which contain
important safety and operating information.
5
COMBUSTION AND VENTILATION PROVISIONS
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.
Confined Space and Unconfined Space
The National Fuel Gas Code, ANSI Z223.1 defines a confined space as a space whose volume is less than
50 cubic feet per 1,000 Btu per hour (4.8m³ per kw) 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 Btu per hour (4.8m³ per kw) of the aggregate input rating of all appliances 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.
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 1 perm (6 x10-¹¹ kg per pa-sec-m²) or less with openings gasketed or sealed, and
b. Weather stripping has been added to openable windows and doors, and
c. Caulking or sealants are applied to areas such as joints around windows and door frames,
between sole plates and floors, between wall-ceiling joists, between wall panels, at penetrations
for plumbing, electrical and gas lines and at other openings.
Instructions for determining maximum Btu’s for a room
Step 1
This calculation is for combustion and ventilation air provisions only and is not intended to be used for
sizing for heating comfort. To determine the maximum Btu’s allowed for a given room size you will need
to calculate the volume of the room in cubic feet. To perform this calculation, fill in the table below and
multiply the room’s width, length and height to obtain the room volume in cubic feet.
Example:If your room is 20 feet in length, 16 feet wide and has an 8 foot ceiling height, the
calculation would be as follows: 20 x 16 x 8 = 2,560 cubic feet.
Step 2
Divide the room volume by 50 cubic feet to determine the maximum Btu’s per hour the room can
utilize.
Example:Using the above example: 2,560 cubic feet divided by 50 = 51.2 x 1,000 = 51,200 Btu’s.
If the rating of your appliance plus any other gas appliances installed in the space is rated at more Btu’s
than the example calculated above, you must follow instructions for confined space. See shaded
WARNING above. If your appliance is rated at less Btu’s than the example calculated above, then your
area is considered unconfined space.
WARNING: If the area in which the heater may be operated is smaller than that defined as an
unconfined space or if the building is of unusually tight construction, provide adequate
combustion and ventilation air by one of the methods described in the National Fuel Gas
Code, ANSI Z223.1, Section 5.3 or applicable local codes.
ROOM
LENGTH
ROOM
WIDTH
ROOM
HEIGHT
ROOM VOLUME
IN CUBIC FEET
X X =
6
INSTALLATION CLEARANCES
To ensure a safe installation in a masonry or approved factory built fireplace, the following instructions must
be carefully followed.
Minimum mantle clearance when unit is installed as a vent free appliance in a pre-existing fireplace.
+ A) Minimum clearance from the
side of the fireplace opening to
any combustible wall should
not be less than 15 inches.
+ B) Minimum clearance from the top
of the fireplace opening to any
combustible ceiling should not be
less than 42 inches.
+ C) Minimum clearance from the
side of the fireplace opening to
part of a mantle piece should not
be less than 6 inches. See figure
at right.
Minimum Mantle Clearance Without Hood Minimum Mantle Clearance With Hood
HEAT
RESISTANT
MATERIAL
12”
MINIMUM
HEAT
RESISTANT
MATERIAL
8”
MINIMUM
NOTE: The stated installation clearances provide the safest distance for combustible materials to
ensure that walls, ceilings and mantle components will not be affected by heat discoloration,
warpage, or possible fire. Each appliance installation presents a different set of variables which
can create problems beyond the control of the gas log manufacturer. It is the responsibility of
the installer to stay within the minimum clearances stated and set forth by the manufacturer
within this instruction manual.
INSTALLATION INSTRUCTIONS WHEN
INSTALLING AS A VENT FREE APPLIANCE
The installation of this appliance must conform with local codes or, in the absence of local codes with
the National Fuel Gas Code, ANSI Z223.1.
NOTE: Before the unit is connected to any gas line, check the name plate on the unit for the proper
gas type you will be using.
The appliance regulator furnished on the appliance is not intended to regulate any gas pressure above ½psig.
If using LP gas, a low pressure regulator (not furnished) must be installed in the gas line between the tank
and appliance. Do not connect the appliance to the gas line if this regulator is not in place. If using natural
gas, check with the gas company to insure that proper gas pressure is available.
WARNING: An explosion could occur if a connection is made directly to an unregulated LP gas tank.
GAS
PRESSURE: Minimum inlet gas supply pressure must be 5.0” WC for natural gas or 11” WC for
LP gas for the purpose of input adjustment. Maximum inlet gas supply pressure must not exceed 10.5”
WC for natural gas, or 14” WC for LP gas. The gas line supplying the appliance must be sufficient size
to furnish the appropriate supply pressure to the appliance when being operated on the high setting.
+ The appliance and its individual shutoff valve must be disconnected from the gas supply
piping system during any pressure testing of that system at test pressures in excess of ½
psig (3.5kPa).
+ The appliance must be isolated from the gas supply piping system by closing its individual
manual shutoff valve during any pressure testing of the gas supply piping system at test
pressures equal to or less than ½psig (3.5kPa).
+ Always keep appliance area clear and free from combustible materials, gasoline and other
flammable vapors and liquids.
+ Pressure tap screws must be closed before turning on gas to appliance.
+ Any outside air ducts and/or ash dumps in the fireplace shall be permanently closed at the
time of the appliance installation.
+ Special provisions should be made if the unit is to be installed into a sunken fireplace by
raising the floor of the fireplace using non-combustible materials to ensure adequate
airflow.
7
8
ASSEMBLY INSTRUCTIONS
1. Remove grate/burner assembly from the box and place in the center of the fireplace.
2. Connect the gas line to the appliance regulator located under the grate. NOTE: The manual and
thermostat valve units will have this appliance regulator. The millivolt valve will not have this
regulator. The appliance regulator is built into the millivolt valve and the gas line is connected to the
valve.
3. Make sure the gas connections are tight. Turn on the gas and coat each joint with a soap and water
solution and watch for air bubbles, which will indicate leaks. Any leaks must be corrected before
proceeding with installation. DO NOT USE A FLAME OR ANY IGNITION SOURCE TO
CHECK FOR LEAKS.
4. Remove logs from the box. Notice the notches in the larger logs and the numbers on the bottom of
the same logs. The log placement is very important to the safe operation of the appliance.
NOTE: Match the log placement photo in this instruction manual with the model number of your log set
for correct log placement. The logs MUST be placed exactly as shown. If there is any evidence of carbon or
blackening on the logs, they may be incorrectly placed. There should not be any carbon or blackening on
the logs at any time.
5. Place the back log in the grooves on the elevated cradle toward the back of the grate making sure
the grooves in the bottom of the log fit on the cradle.
6. Place the middle log in the grooves on the center elevated section of the cradle making sure the
grooves in the bottom of the log fit on the cradle. This will position this log between the burner.
7. Place the front log on the front of the grate in front of the cradle making sure the grooves on the
bottom and front of the log fit the bars on the grate.
8. Place the small top logs in the grooves on top of the front and back log, making sure these logs lay
across the middle log in the appropriate groove.
9. Match the model number of your log set with the log set on pages 13 and 14 of this instruction
manual. Your log set should look like this. If it doesn’t, follow steps 5 through 8 above.
This appliance may be installed in an aftermarket *permanently located, manufactured (mobile)
home, where not prohibited by state or local codes.
*Aftermarket: Completion of sale, not for the purpose of resale, from the manufacturer.
This appliance is only for use with the type of gas indicated on the rating plate. This appliance is
not convertible for use with other gases.
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