T.a.c. 2214 Series General Instructions Manual - page 5
F-24577-3
©
Copyright 2008 TAC All Rights Reserved.
5
Optional Mounting
Eliminate the pipehead fitting by using the 22-022 thermostat
conversion kit and the included instructions, plus the
following:
1/4" Plastic Air Lines: Install the 1/4" barbed couplings into
the air lines. Connect the tube assembly to the 3/16" end of
these couplings.
1/4" Copper Air Lines: Solder the barbed couplings into the
copper lines. The tube assembly can then be connected to
the 3/16" end of the couplings.
¡F
¡C
5
2
12
6
2
Block
Branch
Main
Polyethylene
Tubing
Air Supply
Remove Locator
and Adaptor
20-710
Mortar Joint Fitting
(order separately)
20-693
6 in. Tube Assembly with Eyelets
(included with thermostat)
Thermostat
Cover
(order separately)
Mounting Screws
(included with thermostat)
20-714
Wall Plate
(included with
thermostat)
Figure-7 Thermostat Installation Using
Pipehead in Masonry Wall.
¡F
¡C
5
2
12
6
2
Branch
Main
Polyethylene
Tubing
Air Supply
Cutouts
(partially formed
on underside)
20-689
Mounting Fitting with
8 ft. Copper Lines
(order separately)
20-716
Insulating Back Plate
(order separately)
20-693
6 in. Tube Assembly
with Eyelets
(included with
thermostat)
Cover
(order separately)
20-642
Mounting Ring and
Flathead Screws
(order separately)
Thermostat
Mounting Screws
(included with thermostat)
Figure-8 Surface Mounting of Thermostat,
Pipehead Application.
CALIBRATION
The 2214 series thermostats are factory calibrated with day
sensor throttling range set at 3 °F. They should not require
calibration upon installation. However, if it is necessary,
change the throttling range, calibration, or switch point setting
as follows:
1. Remove the thermostat cover and install a 22-138 branch
tap gauge adaptor into the branch pressure tap hole
(Figure-9).
2. Measure the ambient temperature with an accurate
thermometer. This temperature
must be within the range
of the thermostat
. Take care not to breathe on, or place
a hand near the bimetals, as this will result in an
inaccurate reading.
Day Setpoint Calibration
1. Position the day setpoint cam (Figure-9) to match the
ambient temperature.
2. Set the main air pressure to 15 psig and adjust the day
calibrating screw using a 20-881 thermostat wrench
(1/16” hex wrench) until the branch tap gauge reads
9 ± 1 psig. Clockwise rotation increases the branch line
pressure. Counterclockwise rotation lowers the branch
line pressure.
Night Setpoint Calibration
1. Increase the main line pressure to 25 psig.
2. Using a 20-881 thermostat wrench (1/16” hex wrench) in
the night setpoint screw (Figure-9), position the night
setpoint dial to match the ambient temperature.
3. Firmly hold the night setpoint dial with your fingers and
adjust the night calibrating screw until the branch tap
gauge reads 9 ± 1 psig.
4. Release the dial and allow it to rotate with the night
calibrating screw to the desired night control point.
˚F
˚C
5
2
12
6
2
T R
H
Day Setpoint
Branch
Pressure
Tap
Setpoint Adjustment
Day Calibration
Screw
Cover Scale
Setpont Indicator
Celsius
Scale
Fahrenheit
Scale
Limit Stops (2)
(Accessory)
Night Calibration and
Setpoint Screw
Night Setpoint Dial
Day Bimetals
Day Throttling
Range
Adjustment
Night Bimetal
Switching
Screw
Figure-9 Thermostat Calibration Features
and Limit Stop Accessory.