Mr. Heater HST45 Operations Instructions Page 9

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Operating Instructions and Owner’s Manual | Gas-Fired Low-Intensity Infrared Heater
It is important to keep the minimum required safe distances from
combustibles
at all times to avoid death, personal injury or property
damage. Clearances from vehicles parked beneath heaters must be
mai
ntained. Signs should be posted to identify any possible
viol
ation of the clearance distances form the heater in the vehicle
areas. Maximum allowable stacking height in storage areas should
be
identified 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 mount-
ing height is 7 feet, except for aircraft hangars and
public
garages.
45° Tilted Installations
MINIMUM REQUIRED SAFE DISTANCES
Mode
l 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
he
ater, 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)
manu
factured to specified 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
co
mbined, 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
ope
ration 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
compa
ny.
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 flue serving a
sepe
rate 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
seala
nt and secure each connection with three sheetmetal
sc
rews.
Minimum Required Safe Distances from
Combustible
s
In all situations, the minimum required safe distances from
combustibles
must be maintained. Combustibles are materials which
may catch on fire and include many common items such as wood,
pape
r, rubber, fabrics, etc. Combustible materials such as those
noted, and any other combustible materials must not be placed
close
r to any base or side of the MHT /HST tube heater than the
distances note
d 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
installe
r, 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
A
G
F
E
D
24" Min
Approx. 4
Note: Dimension “E” indicates the
minimum
required safe distances
from combustibles, it DOES NOT
indic
ate the required mounting
heig
ht. The minimum mounting
heig
ht is 7 feet, except for aircraft
hangars
and public garages.
A
B
F
B
C
HST- 45
45,00
0 5" 24" 54" 38" 36" 6" 4"
Enerco Group, Inc.,
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