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Operating Instructions and Owner’s ManualMr. Heater | Gas-Fired Low-Intensity Infrared Heater
damage. Clearances from vehicles parked beneath heaters must
be maintained. Signs should be posted to identify any possible
violation of the clearance distances form the heater in the vehicle
areas. Maximum allowable stacking height in storage areas should
be identied with signs or appropriate markings. The illustrations
and Table on the adjoining page specify the minimum required safe
distances from combustibles.
Horizontal Installations
Note: Dimension “C” indicates the minimum required safe
distances from combustibles, it DOES NOT indicate
the required mounting height. The minimum mounting
height is 7 feet, except for aircraft hangars and public
garages.
45° Tilted Installations
MINIMUM REQUIRED SAFE DISTANCES
Model BTU/Hr A B C D E F G
MHT-45 45,000 5" 24" 54" 38" 36" 6" 4"
General Guidelines (Residential)
Regardless of the venting arrangement that will be connected to the
heater, the following general guidelines for venting must be followed:
1. The installation must conform with local codes or in the absence
of local codes with the National Fuel Gas Codes, ANSI Z223.1/
NFPA 54, Natural Gas and Propane Installation Code, CSA BI49.1
for Canada.
2. Appliance input ratings are based on sea level operation and
need not be changed for operating up to 2,000 feet (609.9m)
elevation. For operation at elevations above 2,000 feet (609.9m)
manufactured to specied deration condition for Canada and the
United States.
3. The appliance and its appliance main gas valve must be
disconnected from the gas supply piping system during any
pressure testing of that system at test pressures in excess of ½
psi. (3.5kPa.).
The appliance must be isolated from the gas piping system by
closing equipment shutoff valve during pressure testing of the gas
supply piping system at test pressures equal to or less than ½ psi.
(3.5kPa.).
(WARNING) Materials and items, when stored under this heater,
will be subjected to radiant heat and could be seriously damaged.
4. All horizontal venting sections must slope away from the heater at
a rate of ¼” per foot.
5. The total length of vent pipe (horizontal and vertical runs
combined, plus the length of the exterior termination) must not
exceed 25 feet, and must not be less than 5 feet.
6. The vent terminal, mounted outside of the building, should not be
located above walkways. Condensate produced during operation
of the heater could drip onto the walkway and could form ice
during cold weather.
7. Be sure that the venting installation is in accordance with all
applicable local codes and recommendations of the local gas
company.
8. DO NOT connect this heater to a separate chimney, and DO
NOT common vent with any other fuel burning appliance. Gas
appliances must not be connected to a chimney ue serving a
separate solid-fuel burning appliance.
9. Maintain a minimum of 1-inch clearance from combustibles
around all vent pipes.
10. Seal all vent pipe connections with high temperature silicone
sealant and secure each connection with three sheet metal
screws.
Minimum Required Safe Distances from
Combustibles
In all situations, the minimum required safe distances from
combustibles must be maintained. Combustibles are materials which
may catch on re and include many common items such as wood,
paper, rubber, fabrics, etc. Combustible materials such as those
noted, and any other combustible materials must not be placed closer
to any base or side of the MHT tube heater than the distances noted
in the diagrams on the following page. If you have any questions
about the minimum required safe distances from combustibles,
or the associated diagrams, please contact your installer, Enerco
representative or distributor, of Enerco Technical Products during
normal business hours which are Monday through Friday, 8:15 a.m. to
4:45 p.m., Eastern Time.
Telephone: (800) 251-0001 or (216) 916-3000
It is important to keep the minimum required safe distances from
combustibles at all times to avoid death, personal injury or property
A
G
F
E
D
24" Min
Approx. 45°
Note: Dimension “E” indicates the mini-
mum required safe distances from
combustibles, it DOES NOT indicate
the required mounting height. The
minimum mounting height is 7
feet, except for aircraft hangars and
public garages.
A
B
F
B
C