Other Applications; To Test Thermostat - Robertshaw 9200 User Manual

OTHER APPLICATIONS

To power a damper motor or auxiliary circuit that requires continuous
power, O and B terminals are provided. (For example, the damper needs to
be opened whenever the thermostat is being used for cooling.) When the
system switch is in the cool position, the O terminal is energized.
SETTING HEAT ANTICIPATOR
NOTE: S
OME HEATING SYSTEMS REQUIRE A LONGER OR SHORTER
TO MAINTAIN COMFORT
. (
CONDITIONS REFER TO
1. For replacement installations, match the anticipator setting with that
of the thermostat being replaced.
OR
2. Match current draw (amperage) of the heating control or relay. This
can be done by checking the rating label on the control within the
heating system. If the label cannot be found, the circuit amperage
can be determined as follows:
a. Turn HEAT-OFF-COOL switch to OFF, or set temperature to lowest
setting so that the contacts are open.
b. Set an AC ammeter to the 0 to 1 amperage
range. Place probes on W and R terminals.
On heating only models probe both wires.
On models with a positive off lever, make
sure the lever is in the OFF position. The
heating valve or relay must then turn ON
and a reading will appear on the meter. DO
NOT USE A VOLTMETER OR A DC AMME-
TER.
c. Set the heat anticipator to the meter
reading. This is the normal setting.
3. The anticipator adjustment must be made so that the thermostat is in
balance with the rest of the system. It will determine how often the
system turns on and off.
Allow the heating system to operate for a full day or more. A correct
anticipator setting should maintain the temperature within 1°F. Too
frequent cycling of the heating system can result in lower life
expectancy for the heating system. Make anticipator adjustments in
0.1 amp increments at a time.
WARNING: T
DIRECTLY TO THE THERMOSTAT BY SHORTING OUT THE GAS VALVE OR PRIMARY CONTROL
DURING TESTING OR BY INCORRECT WIRING
NOTE: F
OR MILLIVOLT HEATING APPLICATIONS
ANTICIPATOR MUST BE SET TO ITS HIGHEST LEVEL

TO TEST THERMOSTAT

WARNING: DO NOT SHORT (JUMPER) ACROSS TERMINALS OF GAS
VALVE OR SYSTEM CONTROL TO TEST OPERATION. THIS WILL DAMAGE
THE THERMOSTAT AND VOID YOUR WARRANTY.
CAUTION: D
O NOT SWITCH SYSTEM TO COOL IF THE TEMPERATURE IS BELOW
50°F (10°C). T
.
PERSONAL INJURY
. S
ET THE HEAT ANTICIPATOR TO ONE OF THE FOLLOWING
F 4)
IGURE
HE ADJUSTABLE HEAT ANTICIPATOR WILL BURN OUT IF
HIS CAN DAMAGE THE AIR CONDITIONING SYSTEM AND CAUSE
.
(9204H
AND
.
4
ON/OFF
PERIOD
.3
.4
1.6
1.0
.6
Figure 4
25V
ARE APPLIED
9204V )
ONLY THE
.2