Honeywell T4800A - Manual (Page 4)

T4800A PRECISION ELECTRONIC ELECTRIC HEATING THERMOSTAT
68-0151—1 4
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9
68-0151—1 C.B. Rev. 4-96 Printed in U.S.A.
SETTING AND CHECKOUT
IMPORTANT
Make sure that all wiring connections are secure
before beginning checkout.
After the thermostat has been installed and powered up,
simulate normal operation as follows:
³
Turn control knob all the way clockwise . LED
should light and electric heater should start to warm up.
· Turn knob all the way counterclockwise . LED
should go off, the power circuit should be broken and
electric heater should start to cool.
NOTE: The T4800 has a load-responsive time delay
to reduce equipment wear, which makes the
mechanical switching differential appear wider,
the faster the knob is rotated. This time delay
does not affect the thermal operation of the
T4800.
» Allow thermostat to operate for several hours to
determine appropriate temperature setting. Adjust the
setting as necessary, moving the knob only one or two
degrees at a time. The precise temperature control of
the T4800 allows the user to select a lower temperature
setting, which saves energy while maintaining comfort.
OPERATION
The T4800 Thermostat provides precise temperature control
with minimum droop of resistance-rated electric baseboard
heating equipment. The T4800 controls room temperature
within 1
°
F (0.5
°
C) for average baseboard heater loads.
Electric heat thermostats are often affected by the heat
generated in the control. Temperature control points may vary
or droop 2
°
to 4
°
F (1
°
to 3
°
C) depending on the load demand.
Temperature settings are adjusted to offset this. The T4800
provides precise control with minimum droop. This allows
better control of room temperatures from day to night and
season to season while saving energy.
Automation and Control Solutions
Honeywell
1985 Douglas Drive North
Golden Valley, MN 55422
The development of this technology was assisted by the electric power industry of the United States under the sponsorship of
EPRI, the Electric Power Research Institute.
Printed on recycled paper containing at
least 10% post-consumer paper fibers.