Principles Of Operation - TPI TASKMASTER 5100 Series Installation Instructions & Parts List

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 thermostat 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.
VERTICAL DISCHARGE UNITS - AIR PATTERNS
Louver Diffuser (Standard)
MAX
USED ON MTG.
HEIGHT
3.3 & 5.0 Kw 9
7.5 & 10.0 Kw 12
15.0 & 20.0 Kw 18
25.0 & 30.0 Kw 22
40.0 & 50.0 Kw 24
STD = Standard N/A = Not Applicable
Optional diffusers lend added air pattern versatility to individual vertical down blow installations as shown in above illustrations.
General Distribution
(No Diffuser)
MAX
STOCK
A B MTG.
NO.
HEIGHT
20 10 STD 9
40 22 STD 12
52 30 STD 18
75 42 STD 22
84 47 STD 24
When the unit mounted stratification thermostat closes on a
temperature rise and at the same time the floor thermostat
calls for heat, the motor shall be energized immediately
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 temperature
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 immediately
energized.
Anemostat Diffuser
(Optional)
MAX
STOCK
A MTG. A
NO.
HEIGHT
15 -- -- N/A
30 10 30 AD5120
40 15 38 AD5120
55 17 50 AD5150
64 20 60 AD5150
4 of 20
Radial Diffuser (Optional)
MAX MTG. HEIGHT
STOCK
NO.
45 o 45 o
OPEN
N/A -- -- --
RD5120 0 14 36
RD5120 14 21 42
RD5150 20 30 62
RD5150 18 28 68
FORM: 9632
A
OPEN
--
30
35
44
54
ECO 1-7874
REV. 10/22