Specifications

AIR FLOW REQUIREMENTS
Calculate KW per square foot of duct area as: (see step 12)
heater namplate KW
duct area (Sq.Ft.)
FIG. 1 - MINIMUM AIR VELOCITY REQUIRED FOR SAFE OPERATION
OPERATION & MAINTENANCE
All sources of supply must be discon-
nected before working on this equip-
ment
To operate this heater make sure all associated control
equipment is on, energize main supply disconnect and
set controlling thermostat above ambient temperature.
This heater is equipped with automatic and manual
reset temperature limiting controls. If it fails to operate,
make sure manual resets are operative by pushing reset
buttons.
The only routine maintenance required is to check all
electrical connections, including eld and factory made
connections, for tightness at least once each year or
operating season. In addition, of course, any lters in
the airstream must be kept clean so that adequate airow
is maintained.
100
2
200 300 400 500 600 700 800 900 1000 1100 1200
4
6
8
10
12
14
16
0
0
100
2
200 300 400 500 600 700 800 900 1000 1100 1200
4
6
8
10
12
14
16
18
22
24
26
28
30
32
20
0
0
KW PER SQ. FT. DUCT AREA
MINIMUM AIR VELOCITY REQUIRED
(FEET PER MINUTE)
KW PER SQ. FT. DUCT AREA
MINIMUM AIR VELOCITY REQUIRED
(FEET PER MINUTE)
FINNED
TUBULAR
CONSTRUCTION
91 - 100° Inlet Air
81 - 90° Inlet Air
Below 80° Inlet A
ir
OPEN COIL
CONSTRUCTION
3
JOHNSON CONTROLS
FORM 102.20-N1 (509)