Home
href="
2061 ZONE-AIR  
Two-Wire DAMPER MOTOR  
with Access-Mounting Plate  
INSTALLATION INSTRUCTIONS  
WHITE-RODGERS  
Operator: Save these instructions for future use!  
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY  
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE  
PERSONAL INJURY AND/OR PROPERTY DAMAGE.  
DESCRIPTION  
TheType2061DamperMotorprovidesalow-costsystem damper motor which is installed on the duct work to each  
of zoned temperature control for warm air heating. It is of room or zone.  
the two-wire type, and is specially designed for use with  
a two-wire thermostat with .2 Amp heat anticipator.  
stalled on present systems for economical conversion to  
This Damper Motor-Thermostat combination may be in-  
Each room or zone requires one damper motor and one zone heating. It is ideally suited for split-level and ranch-  
thermostat. The thermostat automatically controls the type homes having a warm air heating plant.  
passage of warm air through the duct by operating the  
PRECAUTIONS  
Do not exceed the specification ratings.  
CAUTION  
!
All wiring must conform to local and national electrical  
codes and ordinances.  
To prevent electrical shock and/or equipment  
damage, disconnect electric power to system, at  
main fuse or circuit breaker box, until installation  
is complete.  
This control is a precision instrument, and should be  
handled carefully. Rough handling or distorting compo-  
nents could cause the control to malfunction.  
Donotshortoutterminalsongasvalveorprimary  
control to test. Short or incorrect wiring will burn  
out heat anticipator and could cause personal  
injury and/or property damage.  
WARNING  
!
Do not use on circuits exceeding 30 volts. Higher  
voltage will damage control and could cause  
shock or fire hazard.  
SPECIFICATIONS  
All guarantees are void if these specifications are Thermostat: Use two-wire thermostat with .2 Amp  
exceeded.  
anticipator.  
Electrical Ratings: The Damper Motor draws .2 Amp  
Max. at 25 VAC when in the open position.  
Auxiliary Contacts: Do not exceed 2.0 Amp at 25  
VAC (terminals 2 and 3).  
Timings: From full close to full open - Approximately  
45 seconds  
From full open to full close - Approximately  
60 seconds.  
Maximum Duct Size: 300 square inches  
NOTE  
Maximum Duct Capacity: 1200 cubic feet per  
minute.  
The Damper Motor draws more than .2 Amp while it  
is opening. For this reason, do not use more than the  
recommended number of damper motors per trans-  
former as shown on page 4.  
WHITE-RODGERS DIVISION  
EMERSON ELECTRIC CO.  
9797 REAVIS ROAD  
PART NO. 37-1499B  
Printed in U.S.A.  
Replaces 37-1499  
9516  
ST. LOUIS, MISSOURI 63123-5398  
href="
PRINCIPLE OF OPERATION  
Warp Switch  
Contacts  
2061 Two-Wire  
Damper Motor  
This schematic shows the damper motor in the closed  
position. As the thermostat calls for heat, the damper (Normally Closed)  
To auxiliary circuit  
for operating oil  
2
2
motor is energized as a circuit is made through side “A” of  
burner or gas valve  
motor switch. (At the same, time a circuit is made through  
110-280 or  
3
120-280  
the warp switch heater.) The damper motor begins to  
Thermostat  
NOTE: If same  
Contact  
“C”  
4
transformer powers both  
the auxiliary circuit and the  
damper motor, connect  
the auxiliary circuit to  
terminals 1 and 3 instead  
of 2 and 3.  
open.  
Before the damper motor reaches the full open position,  
side “B” of motor switch closes (providing a low voltage  
auxiliary circuit for starting oil burner or opening gas  
valve), side “A” of motor switch makes with contact “C”,  
and the warp switch heater opens the warp switch con-  
tacts. The warp switch heater remains energized and  
keeps the warp switch contacts open as long as the  
thermostat calls for heat.  
Side “A” of  
Motor Switch  
Line  
1
Side “B” of  
Motor Switch  
Transformer  
Warp Switch  
Heater  
Motor  
INTERNAL WIRING  
EXTERNAL WIRING  
The system is so wired so that if any one zone still calls for  
heat, the burner stays on. When all thermostats are  
satisfied, all dampers will have closed, and the circuit  
broken to the gas valve or oil burner control.  
When the thermostat is satisfied, the circuit through the  
warp switch is broken. After this heater cools for a short  
time, the warp switch contacts close, energizing the  
damper motor through side “A” of motor switch. Just after  
the damper motor begins closing, side “B” of motor switch  
opens (breaking the auxiliary circuit), while side “A” of  
motor switch makes with contact 4 just before the damper  
motor fully closes.  
The blower in the furnace operates as in any conven-  
tional, unzonedhotairsystem. Whentheairintheplenum  
is warmed to a set temperature, the fan control turns the  
blower on. When the air temperature drops, the fan  
controlturnsthebloweroff. Theadditionofzoninghasnot  
affected normal fan operation.  
The damper motor draws no current while in the closed  
position.  
INSTALLATION  
Outlet Zone 1  
Outlet  
DUCT LAYOUT  
This illustration shows a typical layout for a zoned warm  
air system using Zone-Air Controls.  
Zone 2  
BypassDamper  
Parts Group  
133-0010  
Supply Duct  
Bypass Duct  
Zone 1  
Zone 2  
NOTE  
DAMPER  
MOTORS  
The use of a bypass damper is recommended. See  
page 6 for details.  
Outlet  
Zone 4  
Zone 3  
Outlet  
Zone 3  
Zone 4  
INSTALLING DAMPER MOTOR  
The following instructions apply for 6, 8, and 10” ducts.  
(For round ducts and rectangular ducts under 6” a special  
bracket is available which replaces the access-mounting  
plate.)  
Duct Layout For  
4 Zone Warm Air System  
Return Duct  
1. Select a convenient position for damper motor instal-  
lation on duct work to each zone. Carefully locate and  
mark center line on each side of duct.  
Bearing  
Plate  
#10 Sheet  
Metal Screws  
2. Marklocationfor1⁄  
to attach bearing plate by measuring 15⁄16” from center  
of 1⁄  
” hole. Drill all three holes and attach bearing plate  
2
”hole.Alsomarklocationsforholes  
2
with two #10 sheet metal screws provided.  
3. Locate point “X” on center line exactly opposite 1⁄  
15  
Point “X”  
(locate exactly  
opposite 1⁄  
” hole)  
⁄16”  
1
⁄2” Dia. Hole  
2
”
2
hole.  
Centerlines  
of Duct  
2
href="
4. Use access-mounting plate as a template. Hold plate  
against duct and mark the four hole locations for  
attachingplatetoduct.Besureslottedholeincenter  
of plate is over point “X” (Fig. 1) and that edge of  
plate is parallel with edge of duct. Then drill the four  
holes to take #10 sheet metal screws.  
Access-  
Mounting Plate  
Motor  
Damper  
Shaft  
5. Cutout4”x8”accessholethroughwhichdampervane  
is to be installed. Access hole should be centrally  
located between the four mounting holes.  
Indicator  
Wheel  
#10 Sheet  
Metal Screws  
Wing Nut  
Damper Vane  
6. Attach indicator wheel to damper shaft with two 5-40  
screws with lockwashers.  
4” x 8”  
Access Hole  
7. Cut damper vane to duct size, allowing 1⁄  
” minimum  
8
Access-Mounting  
Plate  
clearance between duct and vane at all points. (If  
required, snip notches in vane to clear protruding  
sheet metal screws used to mount bearing plate.)  
Damper Vane  
Notches to clear  
sheet metal  
screws (if required)  
Vane  
Brackets  
Indicator  
Wheel  
8. Attach vane brackets to locate damper shaft on exact  
center line of damper vane. (Dimension from center  
line of vane to center of holes for attaching vane  
brackets is 17⁄32”.) Then start 8-32 set screws into vane  
brackets.  
15  
⁄16”  
5-40 Screws  
With  
Lockwashers  
Do not cut off  
damper shaft until  
vane is installed  
8-32  
Set Screws  
#10 Sheet  
Metal Screws  
9. Insert damper shaft through access-mounting plate,  
then through vane brackets. Holding indicator wheel  
flush against access-mounting plate, lock damper  
Leave 1⁄  
when tightening set screw  
8” minimum clearance  
shaft to vane by tightening set screws, being sure to  
1
leave ⁄  
8
” minimum clearance between edge of  
vane and access-mounting plate as shown.  
11.Motor is shipped in closed position. Turn indicator  
wheel so that yoke on bottom of motor slips into  
squareholesonindicatorwheelwhenmotorisplaced  
into position. Tighten motor firmly with wing nuts. (The  
word“closed”shouldbevisibleontheindicatorwheel.)  
10.Install vane through hole in duct by turning vane  
sidewaysandslippingdampershaftintoslotinbearing  
plate on opposite side of duct. Push indicator wheel  
flush against access-mounting plate and spin indica-  
tor wheel to assure free turning of vane. Then attach  
access-mounting plate to duct and cut off damper  
shaft so it extends 1” past bearing plate.  
For best connections, use #18 Thermostat wire. #16 will  
also work satisfactorily.  
WIRING  
All wiring must conform to local and national electri-  
cal codes.  
Make connections to screw terminals according to wiring  
diagram.  
NOTE  
To check motor operation without thermostat connected,  
jumper 2 to 4 to open motor. Remove jumper to close  
motor.  
The WR S81-0125 Transformer (40 VA) will handle up to  
4 damper motors. The WR S81-0126 (20VA) will handle  
up to 2 damper motors.  
If the furnace manufacturer recommends a wiring dia-  
gram, follow such instructions. If none are available, the  
following diagrams show suggested circuits for Type  
2061Dampermotorsinconjunctionwithtwo-wirethermo-  
stats (.2 Amp anticipator) and other related controls.  
3
href="
Low Voltage  
Constant Ignition  
Oil Burner Control  
High Limit  
H
Line  
G
White-Rodgers Damper Motor Thermostats (Two-Wire)  
T
T
1
2
3
Burner  
Motor  
x
x
For  
Oil  
2
2
2
2
2
2
2
2
2
2
2
x
x
4
4
4
4
4
1
3
1
3
1
3
1
3
1
3
1
3
x
For  
Gas x  
H
LINE  
G
2061 Damper Motors  
G
LINE  
H
S81-0126  
TRANSFORMER  
Additional  
Zones  
H
Line  
G
Transformer  
LOW VOLTAGE  
SILENT KNIGHT  
GAS VALVE  
S81-0125  
Transformer  
HIGH LIMIT  
2
1
3
4
Typical Multi-Zone Gas or Oil Fired System  
PLUG-IN PILOT  
White-Rodgers Damper Motor Thermostats (Two-Wire)  
High Limit  
Pilot  
H
Line  
G
2
2
2
2
2
2
4
4
4
1
3
1
3
1
3
S81-0125  
Transformer  
26A00 Series  
Low Voltage  
Diaphragm Gas Valve  
2061 Damper Motors  
Transformer supplies  
power for low voltage  
gas valve as well as  
damper motors.  
Typical 3-Zone Gas Fired System  
2. Turn thermostat to lowest setting. Damper vane for  
that zone will close and furnace burner will shut off as  
auxiliary circuit is broken on damper motor.  
CHECKING THE SYSTEM  
Turn on the electricity. If gas fired, be sure pilot is lit. Then  
check each zone separately as follows:  
1. Turn thermostat to highest setting. Damper vane for  
that zone will open and furnace burner will come on as  
auxiliary circuit is made on damper motor.  
4
href="
OPERATION  
MANUAL OPERATION  
To change damper vane from closed to open position:  
Loosen wing nuts and pull damper motor back from  
duct a short distance. Rotate indicator wheel 90° in  
either direction so that yoke on damper motor drops  
into the two round holes on indicator wheel. Then  
retighten wing nuts.  
The position of the damper vane can always be  
determined by looking at the indicator wheel. If the  
word “open” is visible, the vane is open. If the word  
“closed” is visible, the vane is closed.  
Observe the following instructions in the event it is neces-  
sary to change the damper vanes from closed to open  
position. For example, if the cooling system is not zoned  
but does use the same duct work as the heating system,  
the damper vanes should be changed from the closed  
position to the open position at the start of the cooling  
season.  
To change damper vane from open to closed position:  
Loosen wing nuts and pull damper motor back from  
duct a short distance. Rotate indicator wheel 90° in  
either direction so that yoke on damper motor drops  
into the two square holes on indicator wheel. Then  
retighten wing nuts.  
CAUTION  
!
Be sure to change the vanes back to the open  
position at the start of the heating season.  
5
href="
133-0010  
ZONE-AIR  
BYPASS DAMPER  
INSTALLATION INSTRUCTIONS  
DESCRIPTION  
This bypass damper was designed for use with zoned The bypass damper, operating by means of air pressure,  
warm air heating and air conditioning systems. It is permits any excess volume of air to pass directly to the  
installed in a connecting duct between the furnace ple- cold air return, avoiding an increased air velocity through  
num or the supply duct and the cold air return duct.  
theremainingopenductswhichwouldresultindiscomfort  
to the occupants of that zone.  
Its purpose is to control and compensate for excess  
volume and velocity of the air due to the closing of the  
dampers leading to some of the zones.  
INSTALLATION  
All parts needed for the bypass damper are provided If several zones are not calling for heat, the bypass  
except the damper vane. The vane should be cut from a dampershouldbepartiallyopen;ifonlyonezoneiscalling  
piece of sheet metal to the proper size to fit the duct.  
for heat, the bypass damper should be open.  
The bypass duct should be properly sized. It should be  
designed to handle at least the same amount of air as the  
supply duct, less that required by the smallest zone.  
NOTE  
See the layout for zoned warm air system on page 2 for  
additional information.  
The damper located in the bypass duct has a counter-  
weighted arm. It operates through the pressure of the air  
as opposed to the torque of the weighted arm. Adjust the  
counterweight so that with all zones calling for heat, the  
fan in operation, and all ducts open, the bypass damper  
is in the closed position.  
Connecting  
Duct  
Counter-  
weighted Arm  
Furnace  
Plenum  
Partially open; one  
or more zones closed;  
fan operating  
Air pressure  
bypass damper  
closed; all zones  
open and/or  
Cold Air  
Return  
Open position;  
most zones closed;  
fan operating  
not operating  
6