9
DIMENSIONS / MAINTENANCE
Figure 9.1
Unit Drawing
A
23.75
B
16.13
4X .312 Dia Mounting Holes
4.75
9.00
17.00
Table 9.1
Dimensions
Dimensions
Radiating
Shipping
(Inches)
Area
Weight
A
B
(Sq. Inches)
(Lbs.)
MT28,30,33
17.12
7.63
93
30
MT56,60,66
24.00
14.44
186
40
MT84,90,99
30.75
21.25
279
48
MT112,120,132,160
37.58
28.08
372
59
Model
Numbers
Note: All models except MT160 include a secondary re-radiating grid screen (shown in drawing above).
MAINTENANCE
All heating equipment should be serviced before each
heating season to assure proper operation. The following
items may require more frequent service based on the
environment in which the unit is installed, and how long
the unit is operated.
Burner Assembly
Disconnect all electrical power to the heater and close
the gas supply valve installed adjacent to the heater.
With an air hose regulated to 15 psig maximum, blow
off any dust and dirt that has accumulated on the heater,
by blowing across the ceramic burner (not directly at the
ceramic burner). Do not insert the air hose into the inlet
of each venturi tube.
Burner Orifice
Remove each burner orifice, clean, and reinstall on the
heater manifold. Drill sizes can be found in Table 7.1.
Pilot Assembly (not applicable for Direct Spark Ignition)
Remove the pilot burner assembly. With an air hose regulated to 15
psig maximum, blow the assembly clean and replace in the original
position.
Electrical Wiring
The electrical wiring should be checked annually for loose
connections or deteriorated insulation.
Gas Piping & Controls
The gas valves and piping should be checked annually for
general cleanliness and tightness. The gas controls should be
checked to insure that the unit is operating properly.