Filter
Top Products
CTC thermostats regulate 24 to 30 VAC single-stage heating-cooling systems. See the chart below
for specific models and applications.
THERMOSTAT MODELS AND APPLICATIONS
PART SWITCHING
NUMBER APPLICATION ORIENTATION SYSTEM FAN
43004 Use in standard heating/cooling systems. Horizontal Heat-Off-Cool On-Auto
43005 Vertical
43301 Use in oil- or gas-fired systems. Horizontal
43302 Vertical
43306 Use in central electric heat system. Horizontal
43307 Vertical
SPECIFICATIONS
ELECTRICAL DATA
Switch Rating: 24VAC (30 VAC max.)
Heating - 0.15 to 1.2 amps
Cooling - 0-1.5 amps
Switch Action: Sealed mercury switch
Anticipator rating:
Heating - Adjustable from 0.15 to 1.2 Amps
Cooling - Fixed 24 VAC
THERMAL DATA
Temperature Range: 50ºF - 90ºF (10ºC - 32ºC)
MERCURY BULB
MECHANICAL
THERMOSTAT
CLIMATE
TECHNOLOGY
CORPORATION
Climate Technology Corp.
2500 Frisco Avenue
Memphis, TN 38114
A Hunter Fan Company
1-800-676-7861
41514-01 12-21-2001
APPLICATIONS
This thermostat is designed for use with:
• Standard heating and cooling systems
• Electric heating and cooling systems
• Single stage heat pump systems
• Two-transformer systems
• Electronic air cleaners
• Humidifiers
• Zone Dampers
This thermostat cannot be used with:
• Millivolt systems
• Multi-stage applications
DISPOSAL INFORMATION
This product contains mercury in a
sealed tube. DO NOT place this control
in the trash at the end of its useful life.
If this product is replacing a control that
contains mercury, DO NOT place the old
product in the trash.
Contact your local waste management authority
for instructions regarding recycling and the
proper disposal of this product, or of and for any
old control containing mercury in a sealed tube.
INSTALLATION
When installing this product:
• Read these instructions thoroughly. Failure
to follow them could damage the product
or produce an unsafe condition.
• Check the ratings in these instructions and
on the product to make sure the product is
compatible with your application.
• Installation must be performed by a trained,
experienced service technician.
• Upon completion of the installation, verify
the correct operation of the product as
detailed in these instructions.
LOCATION
The thermostat should be located in an area
with good air circulation at average tempera-
ture. It should be on an inside wall.
DO NOT place the thermostat where it can be
affected by:
- drafts or dead spots behind doors or in corners.
- hot or cold air from ducts.
- radiant heat from the sun, fireplaces, or
appliances.
- unheated (uncooled) areas behind the
thermostat, such as outside walls.
This thermostat is a precision instrument and
was carefully adjusted at the factory. Handle it
carefully.
WARNING!
To avoid electrical shock or equipment damage, make
sure power is disconnected before installation.
SERVICE INSTRUCTIONS
CALIBRATION
FIGURE 6 CALIBRATING THERMOSTAT
The thermostat is accurately calibrated before
leaving the factory and no further calibration
should be necessary. If the thermostat appears
to be out of calibration or for any reason fails
to function properly, a qualified serviceperson
should proceed as follows:
1. The anticipator’s heat may adversely affect
thermostat recalibration. To prevent this,
disconnect electrical power power to the
thermostat at the furnace, main fuse, or
breaker box.
2. Move temperature adjustment lever to a
setting about 5° above room temperature.
3. Remove thermostat cover. Slip 7/32"
wrench onto hex nut beneath bimetal.
While holding temperature adjustment
lever stationary, turn hex nut clockwise
until mercury shifts to the right end of the
tube (fig. 7).
4. Move temperature adjustment lever to
lowest setting.
5. Replace thermostat cover. Wait 10 min. for
bimetal temperature to stabilize. Do not
stand near the thermostat during this
period, as your breath and body heat will
affect bimetal temperature.
6. Move temperature adjustment lever to
correspond to actual room temperature.
Then remove thermostat cover.
7. Slip 7/32" wrench onto hex nut. While
holding temperature adjustment lever
stationary, turn hex nut counter-clockwise
until mercury just barely shifts to the left
end of the tube.
8. Replace thermostat cover and set tempera-
ture adjustment lever to desired tempera-
ture. Turn on electrical power to system.
HEAT ANTICIPATION ADJUSTMENT
FIGURE 7 ANTICIPATOR ADJUSTMENT
Some heating installations require longer or
shorter “ON”, “OFF” periods to maintain even
temperatures. For average conditions, set the
heat anticipator indicator to match the current
rating of the primary heating control. Move
indicator approximately 1/2 division in
direction indicated by the arrows on the
thermostat for longer “ON” cycles, or move
lever in opposite direction for shorter “on”
cycles. Allow at least 24 hours to determine if
setting provides satisfactory operation before
making any further adjustments.
Bimetal
7/32” Calibration wrench
Temperature
adjustment
lever
.3
.4
.5
.6
.8
1.2
.15
.2
.25
L
O
N
G
E
R
C
Y
C
L
E
S
Arrow points to the
matched current rating
of the primary control.
Move this lever
to adjust heat
anticipator.