COMPACT ZONE VALVES
2-WIRE, 2-WAY
For use on systems up to 142 PSI
INSTALLATION INSTRUCTIONS
Operator: Save these instructions for future use!
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE IN-
STALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY
AND/OR PROPERTY DAMAGE.
DESCRIPTION
The compact zone valves are 2-way straight through, available
as a normally open or normally closed valve. The zone valves
come with or without a SPST normally open auxiliary switch and
featureaswing-typeballvalve,whichisdesignedtorotatewhich
causes the ball plug to seat on a different section of its surface
on each closing. They are available in several piping options,
sweat, NPT, inverted flare and flare fitting end connections for
standard copper tubing, for use with 2-wire thermostats. These
zone valves provide a low cost system of zoned temperature
control wherever hot water is the heating medium. In new
construction, the piping system can be laid out to produce any
number of independent temperature controlled zones by use of
these valves. In existing buildings, a variety of zone combina-
tionscanbeobtained, dependingontheparticularpipinglayout.
Eachzonerequiresonezonevalveandonethermostat, butonly
one circulator is normally required for the entire system.
Flare Fittings
Available Separately
PRECAUTIONS
This compact zone valve is intended for use with a low voltage
system; do not use this zone valve with a millivolt or line voltage
system. If in doubt about whether your wiring is millivolt, line or
low voltage, have it inspected by a qualified heating contractor
or electrician.
CAUTION
To prevent electrical shock and/or equipment damage,
disconnect electric power to system at main fuse or
circuit breaker box, until installation is complete.
Do not exceed the specification ratings.
Allwiringmustconformtolocalandnationalelectricalcodesand
ordinances.
WARNING
Do not use on circuits exceeding specified voltages.
Higher voltages will damage control and could cause
shock or fire hazard.
CAUTION
To prevent injuries from scalding always drain system
beforeinstallingorremovingvalve.Toavoidgeardamage
operate lever slowly.
SPECIFICATIONS
All guarantees are void if these specifications are exceeded.
Maximum System Pressure: 142 PSI
MOUNTING POSITIONS:
Upright or 0° to 90° from upright
Differential Across Valve: 20 PSI
Maximum Water Temperature: 230°F
Minimum Water Temperature: 41°F
Maximum Ambiant Temperature: 140°F
Approx. Time Cycle: 10 seconds from full close to full open;
4 seconds from full open to full close.
Electrical Rating:
INLET
LEFT OR RIGHT
UP OR DOWN
UPRIGHT
360°
M A N
Valve motor – 0.35A @ 25VAC, 50/60 Hz., 6 W nominal
Auxiliary switch: 3.0A Max. @ 25VAC
Thermostat: Use two-wire heating thermostat, .35A heat
anticipation is required.
Flow Coefficient - Cv Rating:
1/2" valves – 3.5 Cv (3.0 Kv)
3/4" valves – 3.5 Cv (3.0 Kv)
1" valves – 3.5 Cv (3.0 Kv)
Fig. 1 Zone valve mounting positions
WHITE-RODGERS
EMERSON ELECTRIC CO.
9797 Reavis Road
PART NO. 37-6334A
St. Louis, MO 63123-5398
0142
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WIRING CONT.
All wiring should be done according to local and national electrical codes
W-R 2-WIRE HEATING THERMOSTATS
DIAGRAMS FOR SYSTEMS WHERE BURNER AND CIRCULATOR
OPERATION IS INDEPENDENT OF THERMOSTATS
TRANSFORMER
N
LINE
HOT
24 VAC
Fig. 6 Zone Valve (N.C.)
ZONE VALVES (N.C.)
DIAGRAM FOR SYSTEMS WHERE INTERNAL TRANSFORMER OF RELAY CONTROL SUPPLIES POWER
FOR ZONE VALVES
TYPE 668
OIL BURNER CONTROL
F
TYPE 956
FLAME
W-R 2-WIRE HEATING THERMOSTATS
DETECTOR
F
T
T
IGNITION
TRANS.
RELAY/TRANSFORMER
W
ORANGE
WHITE
BLACK
BLACK
HIGH
LIMIT
Y
BURNER MOTOR
TRANSFORMER
COM
STAT
WHITE
R
G
ZONE VALVES (N.C.)
N
BLUE
LINE
COMMON
BLACK
24 VAC
HOT
MUST BE N.E.C.
GAS VALVE
BLACK
HIGH LIMIT
CLASS 1 WIRING
G (BLK)
N.O.
N.C.
RELAY COIL
Fig. 7a Diagram for Gas-Fired System,
eliminate Oil Burner for Gas-Fired system
RED
Fig. 7
TAPE
OFF
Diagram for Oil-Fired system using Relay/
Transformer with Zone Valves (N.C.)
CIRCULATOR
MOTOR
DIAGRAMS FOR SYSTEMS WHERE EXTERNAL TRANSFORMER REQUIRED FOR POWERING FOR ZONE
VALVES
W-R 2-WIRE HEATING THERMOSTATS
ADDITIONAL
ZONES
RELAY/TRANSFORMER
STAT
BLUE
BLUE
HOT
LINE
1
2
N
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
T1
T2
C1
C2
B2
B1
IGN.
TRANS.
ZONE VALVES (N.C.)
TRANSFORMER
TRANSFORMER
N
N
LINE
HOT
CIRCULATOR
MOTOR
LINE
HOT
BURNER
MOTOR
Fig. 8
Diagram for for System using Relay/transformer
with Zone Valves (N.C.)
3
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WIRING (Continued)
DIAGRAMS FOR SYSTEMS WHERE EXTERNAL TRANSFORMER REQUIRED FOR POWERING FOR ZONE
VALVES
BLACK
TO ZONE
VALVES
BLACK
TYPE 829A RELAY
BLACK
BLACK
THERM
RELAY/TRANSFORMER
TYPE 809A RELAY
BLACK
BLACK
T2
T1
N
LINE
5
6
1
HOT
LINE
N
2
HOT
3
4
1
2
HOT
LINE
N
C1
B1
C2
1
2
L
L
B2
IGN.
TRANS.
TO GAS VALVE AND
TRANSFORMER OR
OIL BURNER
TO GAS VALVE
AND TRANSFORMER
OR OIL BURNER
CONTROL
CIRCULATOR
MOTOR
CIRCULATOR
MOTOR
CIRCULATOR
MOTOR
CONTROL
BURNER
MOTOR
Alternate Connections
For Type 809A Relay
Alternate Connections
For Relay/Transformer
Alternate Connections
For Type 829A Relay
OPERATION
Automatic (AUTO) (N.C. valve) (Fig. 9)
On a call for by the thermostat, the valve opens and its auxiliary
contacts close, providing a low voltage auxiliary circuit for
starting the burner and/or circulator. After an elapsed time of
about 10 seconds, the valve reaches the full open position. The
valvemotornowremainsenergizedtokeepthevalveintheopen
position. Whenthethermostatissatisfied, thevalveclosesbyits
integralreturnspring. Theauxiliarycontactsopen,de-energizing
the auxiliary circuit.
AUXILIARY
SWITCH
N.O.
AUXILIARY
SWITCH
CLOSED
B
A
A
B
VALVE CLOSED
POWER 'OFF'
VALVE OPEN
POWER 'ON'
Manual (MAN) (Fig. 10)
Fig. 9 Normally close (N.C.) zone valve
Use manual lever in case of power failure or for servicing the
system. If power fails while valve is open, valve will return to the
closed position. To manually open the valve, move the manual
lever to the "MAN" position and lock in place. The valve will
return to the "AUTO" position when the valve is electrically
energized. The auxiliary contacts close in the "MAN" position.
The manual lever is not operational on normally open (N.O.)
valve models.
AUTO
MAN
AUXILIARY
SWITCH
CLOSED
A
B
Normally open models (N.O.) (Fig. 11)
VALVE OPEN, MANUAL POSITION
POWER 'OFF'
A normally open valve operates opposite to a normally closed
valve. It is open in the de-energized position and closes when
thevalveisenergized.Areverse-acting(close-on-rise)thermostat
is required to control a normally open (N.O.)valve.
Fig. 10 Manual operation of normally close (N.C.) valve
AUXILIARY
AUXILIARY
SWITCH
SWITCH
CLOSED
N.O.
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. Zone valve for that zone
will open and furnace burner will come on as auxiliary circuit
is made on valve motor.
B
A
A
B
VALVE OPEN
POWER 'OFF'
VALVE CLOSED
POWER 'ON'
2. Turn thermostat to lowest setting. Zone valve for that zone
will close and furnace burner will shut off as auxiliary circuit
is broken on zone valve.
Fig. 11 Normally open (N.O.) zone valve
4
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