Si (Metric) Conversion Factors; Unit Location; Location Recommendations; Installation - Modine Manufacturing MT28 Installation And Service Manual

SI (METRIC) CONVERSION FACTORS / UNIT LOCATION / INSTALLATION
Table 3.1

SI (METRIC) CONVERSION FACTORS

To Convert
" W.C.
(inches water column)
psig
subtract 32 and then
°F
multiply by 0.555
inches
feet
cfm (ft /min)
3
cfh (ft /hr)
3
Btu/ft
3
pound
Btu/hr
gallons

UNIT LOCATION

DANGER
Units must not be installed where they may be exposed to
potentially explosive or flammable atmosphere.
CAUTION
Units are designed for indoor installation only.
DO NOT LOCATE UNITS OUTDOORS.
IMPORTANT
Approval requirements for infrared heaters specify that the
suspended type heaters shall be installed in accordance
with certain sections of the National Fire Codes published
by the National Fire Protection Association and various
ANSI standards. SOME of the requirements are listed
below.
Aircraft Hangars: Approval requirements are contained in
the current edition of ANSI/NFPA 409 (or in accordance
with the enforcing authority for Canada).
Public Garages: Approval requirements are contained in
the current edition of NFPA 88B (CAN/CGA B149 for
Canada).
Parking Structures: Approval requirements are contained
in the current edition of NFPA 88A.
General: All installations must be in accordance with the
current edition of ANSI Z-223.1 (NFPA 54) National Fuel
Gas Code and the current edition of the National Electric
Code, ANSI/NFPA 70. For Canada, installations must
conform with local building codes, or in the absence of local
codes, in accordance with the current edition of CAN/CGA
B149 and the Canadian Electric Code, C22.1.

Location Recommendations

1. When locating the heater, consider the general space and
heating requirements and availability of gas and electrical
supply.
2. Be sure the structural support and chain at the unit
location is adequate to support the weight of the unit.
Multiply By To Obtain
0.24 kPa
6.893 kPa
°C
25.4 mm
0.305 meters
0.028 m /min
3
1.699 m /min
3
0.0374 mJ/m
0.453 kg
0.000293 kW/hr
3.785 liters
3. Be sure that the minimum clearances to combustible
materials and for serving are maintained. The minimum
clearances to combustibles are shown in Table 3.2.
4. Mounting height (measured from the bottom of unit) at
which heaters are installed is critical. Please refer to
mounting height information in Table 4.1.
5. Do not locate units in areas where chlorinated,
halogenated, or acid vapors are present in the atmosphere.

INSTALLATION

Mounting

Figures 4.2 and 4.3 illustrate typical rigid and chain mounting
arrangements, respectively, for a model MT infrared heater.
Check local codes for mounting requirements and use of flexible
gas connectors. Local codes may require rigid mounting. Heaters
3
must be mounted at angles from 10 ° to 35 ° from horizontal. The
gas manifold must be located on the low end of the heater, in a
horizontal position (parallel to the floor).
Where permissible, chain mounting is recommended. 5' chain
mounting sets are available as an accessory, allowing for 10° to
35° mounting angles. In the absence of this chain set, Number
1/0 Tenso chain (200 lb. working load) is recommended. "S"
hooks should be a minimum
be closed after installation. Heaters located in aircraft hangers
or near overhead doors must be rigidly mounted to prevent
swinging. Under no circumstances should the gas supply line
or the electrical supply line to the heater be used to provide any
assistance in the suspension of the heater. Do not locate any
gas or electric service lines directly above or below the heater.
Insure that:
1. Clearances to combustibles (as shown on the rating plate
and in Table 3.2) are maintained.
2. For proper operation, the unit must be mounted on an angle
ten to thirty-five degrees (10 ° to 35 ° ) from the horizontal
with the gas manifold located at the low end of the heater.
See Figure 4.1.
3. In locations used for storage of combustible materials,
signs shall be posted to specify the maximum permissible
stacking height to maintain required clearances from the
heater to the combustibles. See Figure 4.4.
4. Either gas piping or suspension mounting is flexible to
prevent fatigue failure from vibration or thermal expansion.
5. Adequate clearances to sprinkler heads are maintained.
Table 3.2
Combustible Material Clearances
Model
No.
MT28/30/33
MT56/60/66
MT84/90/99
MT112/120/132
MT160
See figure 4.1 on page 4.
1
/ in diameter and the ends must
4"
Minimum Clearances to Combustible Materials
(inches)
Top Sides Rear
30 30 24
36 36 33
48 42 39
54 48 45
60 54 51
Bottom
72
88
104
120
136
3