Installation
1. Install the door heater in position required.
Dimensions can vary to suit door opening. Heaters
can be mounted in horizontal, angular or vertical
position. Do not mount with control box upside
down or on the bottom. Weight of unit is approxi-
mately 375 lbs.
NOTE:
Negative pressure in the building will have
an affect on unit’s ability to maintain an air curtain
effect. This should be taken into account when locat-
ing the unit.
2. Connect electrical power. If the unit does not have a
built-in disconnect switch, then an external discon-
nect should be provided by the installer. Be sure
power supply is the proper voltage. These units are
furnished for specified voltage.
Gas Door Air Heater
©1997 Aerovent
3. Connect gas supply line using the regulator fur-
nished with the unit. Consult your gas company ser-
vice representative to determine the proper size for
the gas line. This varies according to the pressure
and length of the run. Required gas input can be
determined by the chart, Fig. 1.
Fig. 1
NATURAL. GAS
INPUT
NOMINAL
GAS
MODEL NO.
BTU
TEMP. RISE
PRESS.
24S728
325,000
73°F
1 oz.
NDH*
440,000
99°F
2 oz.
3/4 HP
580,000
131°F
3 oz.
440,000
66°F
2 oz.
580,000
85°F
3 oz.
24S728
680,000
102°F
4 oz.
NDH*
790,000
118°F
5 oz.
2 HP
870,000
130°F
6 oz.
990,000
148°F
7 oz.
*PDH = Propane units
4. Mount operating station in a convenient location and
make connections to the terminal strip in the unit as
indicated in Fig. 2, or Fig. 3 for units supplied with
optional high-low fire feature.
Fig. 2. Operating Station
Connect H, 1, 2, and R to terminal
strip in unit control box.
Fig. 3. Operating Station with Optional Hi-Lo Fire
Connect H, 1, 2, R, 13 and 15 to
terminal strip in unit control box.
13'
12'
13'
4'
45
°
Typical Overhead Door
Angular Mounting Approx. 45°
14'
12'
5'
18" Min. Clearance
Roll Top or Straight Lift Door
Vertical Mounting Used With Roll Top Doors
1
1
1
2
2
H
H
R
R
Back of Lid
Box
Lamp
1
2
1
1
2
2
H
H
R
R
13 15
Lamp
Back of Lid
Box
General Installation, Operation and Maintenance Instructions For Aerovent Products
IM-200
June 1997
