Product Manual

PRINCIPLES OF OPERATION
Upon a call for heat from the floor level or unit mounted
optional accessory thermostat, the unit fan motor and
heating elements shall be energized and remain ON until
temperature reaches setting of thermostat; at which time
the heating elements shall be deenergized.
The fan motor shall continue to run and purge heater
casing of residual heat until setting of fan override is
reached, then the fan motor shall be deenergized.
For those units with a factory installed two speed fan
switch (25-50KW), the unit as shipped from the factory is
set to “low” speed. Customer option to set to “high” speed.
For those units available with subdivided circuits, the
accessory two stage thermostat (optional) will, upon a call
for heat, energize fan motor and the first stage heating
element. Should temperature continue to fall, the thermo-
stat shall energize the second stage heating element.
Upon a rise in space conditions towards setting of the
thermostat, the two stages of heating elements shall be
deenergized in reverse sequence.
The fan motor shall continue to run and purge heater
casing of residual heat until setting of fan override is
reached, then the fan motor shall be deenergized.
The accessory unit mounted stratification thermostat will
energize the unit heater fan motor upon a rise in
temperature above its setting.
When the unit mounted stratification thermostat closes on
a temperature rise and at the same time the floor thermo-
stat calls for heat, the motor shall be energized immedi-
ately and the heating element shall be energized, as
previously described.
The automatic reset safety high limit shall deenergize the
heating elements and control circuits should the tempera-
ture exceed the setting of this device. The fan safety
override shall energize fan motor any time the setting of
this device is exceeded so as to purge heater casing of
excess residual heat.
When the accessory fan switch is placed in the ON position
(for summer air circulation), the unit heater fan motor shall
be energized.
NOTE: The wall thermostat is to be set to the OFF position
during this mode of operation (units with contactors).
For those accessory thermostats equipped with an integral
fan switch, place the switch in the HEAT, or AUTO position
for operation of the fan and elements which shall then be
under control of the thermostat as described above.
When switch is placed in the OFF position, the unit shall be
deenergized. When switch is placed in the FAN position,
elements shall be deenergized and fan shall be immedi-
ately energized.
Optional diffusers lend added air pattern versatility to
individual vertical down blow installations as shown in
above illustations.
3
USED MAX A B STOCK MAX A MAX A STOCK STOCK MAX MTG HT. A
ON MTG NO. MTG MTG NO. NO.
HT. HT. HT. 45
O
OPEN 45
O
OPEN
3.3 & 5.0 KW 9 20 10 STD 9 15 -- -- N/A N/A -- -- -- --
7.5 & 10.0 KW 12 40 22 STD 12 30 10 30 AD5120 RD5120 0 14 36 30
15.0 & 20.0 KW 18 52 30 STD 18 40 15 38 AD5120 RD5120 14 21 42 35
25.0 & 30.0 KW 22 75 42 STD 22 55 17 50 AD5150 RD5150 20 30 62 44
40.0 & 50.0 KW 24 84 47 STD 24 64 20 60 AD5150 RD5150 18 28 68 54
STD = Standard N/A = Not Applicable
VERTICAL DISCHARGE UNITS - AIR PATTERNS
TABLE 1
Louver Diffuser (Standard)
General Distribution
(No Diffuser)
Anemostat Diffuser
(Optional)
Radial Diffuser (Optional)