Install Instructions

V4043, V4044, V8043 AND V8044 ZONE VALVES
3 95-6983EF—03
WIRING
Disconnect the power supply before connecting wiring
to prevent electrical shock or equipment damage.
All wiring must comply with local codes and
ordinances. Connections to the individual valves are
shown in Fig. 4-5.
Fig. 4. Typical wiring for V8043E, V8044E.
Fig. 5. Typical wiring for V8043F.
OPERATION AND
CHECKOUT
CAUTION
On 24 V systems, never jumper the valve coil
terminals even temporarily. This may burn
out the heat anticipator in the thermostat.
NORMALLY CLOSED MODELS
With the manual opener set to AUTO and the
powerhead energized, the valve is opened as shown in
Fig. 6A. When the powerhead is de-energized, a
spring-return mechanism drives the valve to the
closed position as shown in Fig. 6B. The valve can also
be opened with no electrical power by moving the
manual opening lever over the stop and pushing
slowly and firmly to the MAN. OPEN position. The stop
permits the valve to be locked in the open position. The
valve will return to the automatic position when the
valve is energized.
Auxiliary switch is not energized when the valve is
manually opened.
NORMALLY OPEN MODELS
When the powerhead is de-energized, a spring-return
mechanism drives the valve to the open position (Fig.
6A). When energized, the valve is closed as shown in
Fig. 6B. A reverse-acting thermostat is required to
control a normally open valve.
NOTE: Inlet Port is stamped “A”, Outlet Port is
stamped “B” on the valve body.
Fig. 6. V8043 operation for normally closed valve.
Checkout
1. Raise the setpoint on the zone thermostat above
the room temperature to initiate a call for heat.
2. Observe all control devices—the valve should
open and the auxiliary switch should make the
circuit to the circulator or other valve at the end
of the opening stroke.
3. Lower the setpoint on the zone thermostat below
the room temperature.
4. Observe the control devices. The valve should
close and the auxiliary equipment should stop.
Service
This valve should be serviced by a trained, experienced
service technician.
1. If the valve is leaking, drain the system and
check to see if the O-ring needs replacing.
2. If the gear train is damaged, replace the entire
powerhead assembly. See the Installation sec-
tion. If the motor is burned out, replace the
motor.
NOTE: Resideo zone valves are designed and tested
for silent operation in properly designed and
installed systems. However, water noises may
occur as a result of excessive water velocity or
piping noises may occur in high temperature
(over 212° F [100° C]) systems with insuffi-
cient water pressure.
NOTE: These hydronic valves are not suitable for use
in open loop systems where there is air expo-
sure.
AUXILIARY
SWITCH
MOTOR
24
TRANSFORMER
TO BOILER TT
RED LEADS
L1
HOT
M5953B
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
L2
1
THERMOSTAT
YELLOW LEADS
R
W
L2
1
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
END SWITCH
TH
TR
24V
TRANSFORMER
TH TR
M5952C
THERMOSTAT
R
W
TO BOILER TT
L1
(HOT)
B
OUT
OPEN POSITION
A
A
IN
B
OUT
CLOSED POSITION
B
A
IN
M5951