Checkout - Honeywell T498A Manual

CAUTION
Disconnect power supply before making wiring connections
to prevent electrical shock or equipment damage.
All wiring must comply with applicable codes
and ordinances.
Thermostats are designed to be used with a limit control in
the appliance.
TO CONNECT WIRES:
Make line voltage wiring connections directly to the lead-
wires installed on the thermostat using wire connectors
approved for No. 12 wires.
Fig. 2 Typical hookup for a T498A thermostat.
SOLDERLESS
CONNECTORS
L1
(HOT)
1
L2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
SPECIAL SERVICE CO/ALR SOLDERLESS
2
CONNECTORS MUST BE USED WHEN
CONNECTING ALUMINUM CONDUCTORS;
OTHERWISE. A FIRE HAZARD MAY RESULT.
IMPORTANT: Be sure that all wiring connectors are tight.
After the thermostat has been installed and wired, simulate
normal operation as follows:
1. Turn setting dial all. the way clockwise
should start to heat.
2. Turn dial all the way counterclockwise
should be broken and the electric heater should start to cool.
T1
L1
3
ELECTRIC
2
HEATER
4
3 BREAKS AND REMAKES BELOW
- 31°F [-35C], OTHERWISE THERMALLY
ACTIVATED: BREAKS ON TEMPERATURE RISE,
MAKES ON TEMPERATURE FALL.
THERMOSTATS ARE DESIGNED TO BE USED WITH
4
A LIMIT CONTROL LOCATED IN THE APPLIANCE.
electric heater
the power circuit
CAUTION
When using aluminum conductors, all wiring connections
to this thermostat must be made to the factory installed lead-
wires, using approved CO/ALR solderless connectors.
Fig. 3 Typical hookup for a T498B thermostat.
6
L1
(HOT)
1
L2
Setting and Checkout
3. To determinate final setting, begin with dial indicator at
20°C [70°F] on the scale. After at least 2 hours operation,
if this setting is not satisfactory, turn dial indicator upscale
to raise the temperature, or downscale to lower the
temperature. Move indicator only a few degrees each time
an adjustment is necessary.
3
T498A, B Electric Heat Thermostat
INSTALLATION OPERATION
3
L1
T1
5
L2
T2
RED
WIRE
ELECTRIC
HEATER
2
SOLDERLESS
CONNECTORS
BREAKS AT POSITIVE OFF ONLY,
5
NOT THERMALLY ACTIVATED.
DO NOT CONNECT GROUNDED CONDUCTOR
6
(ie neutral) ON 120 OR 277V CIRCUITS.
INSULATE AND TAPE, OR CUT OFF RED WIRES
IF UNUSED.