Honeywell Home V4043, V4044, V8043, V8044 Installation Instructions Manual
95-6983EF-03
V4043, V4044, V8043 and
CAUTION
M10162A
VERTICAL
PIPING
HORIZONTAL
PIPING
V8044 Zone Valves
INSTALLATION INSTRUCTIONS
APPLICATION
These valves consist of an actuator motor and valve
assembly for controlling the flow of hot and/or cold
water. The V4043 and V8043 provide two-position,
straight-through control of supply water. The V4044
and V8044 provide two-position, diverting control of
supply water. The valves are designed for use with fan
coil and other units requiring quiet, compact water
valves. The V8043E and F also control supply water
for baseboard radiators and convectors. The V4043E
and V8043J provide straight-through control of
steam only. Models are available with 125 or 300 psi
operating pressure.
INSTALLATION
IMPORTANT
Use this valve in hydronic heating systems
which do not contain dissolved oxygen in the
system water. The dissolved oxygen, which is
found in systems that have a frequent source
of makeup water, causes the rubber plug
inside the valve to deteriorate and eventually
fail.
LOCATION
Install the valve in an area with adequate clearance
to:
— Move the manual opening lever on the side of
the powerhead.
— Remove the powerhead cover.
— Wire the powerhead.
— Replace the powerhead motor.
When Installing this Product...
1. Read these instructions carefully. Failure to fol-
low them could damage the product or cause a
hazardous condition.
2. Check the ratings given in the instructions and
on the product to make sure the product is suitable for your application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
1. Disconnect power supply before connecting wiring to prevent electrical shock of
equipment damage.
2. Normally it is not necessary to remove the
powerhead from the valve body during
installation. If the valve must be disassembled, be certain that it is reassembled
with the water flow in the direction of the
arrow. Reversal of the powerhead will
result in damage to the gear train.
3. On 24V systems, never jumper the valve
coil terminals even temporarily. This may
burn out the heat anticipator in the thermostat.
MOUNTING
The valve can be mounted in any position on a vertical
line. If the valve is mounted horizontally; the
powerhead must be even with or above the center line
of the piping. Make sure that enough room is
provided above the powerhead to remove the cover
for servicing.
Fig. 1. Mounting positions.
V4043, V4044, V8043 AND V8044 ZONE VALVES
OUT
STRAIGHT THROUGH
VALVES
IN
B
A
M35994
OUT
OUT
B
A
AB
IN
2 POSITION
DIVERTING
VALVES
4-7/8 (124)
OUT
IN
1
END SWITCH
MAN
OPEN
AUTO
MAN
OPEN
AUTO
CLEARANCE
FOR COVER
REMOVAL
CONDUIT COVER
FOR V8043F
TERMINAL BOARDLEADWIRES
A
B
F
C
A
D
B
C
B
OUT
IN
N
M
R
S
L
K
H
J
G
SWEAT
3/8 FLARE
2
U
P
FNPT
CLEARANCE NECESSARY FOR COVER REMOVAL
FLAIR-TO-SWEAT UNION ADAPTER
1
2
M16851
DIMENSION IN INCHES (MM)
MODELS A B C D E F G H J
V8043C,D,G 2-3/8 (60) 3-3/4 (90) 7/8 (22) 3/4 (19) — 5-1/4 (133) 3-7/16 (87) 5/8 (16) —
V8043F 2-3/8 (60) 3-3/4 (90) 7/8 (22) 3/4 (19) 3-7/8 (98) 5-1/4 (133) 3-7/16 (87) — 3/4 (19)
SWEAT MODELS K L
5/8 IN. I.D. (FOR 1/2 IN. COPPER TUBING) 3-1/8 (79) 1-9/16 (40)
7/8 IN. I.D. (FOR 3/4 IN. COPPER TUBING) 3-1/2 (89) 1-3/4 (44)
1-1/8 IN. I.D. (FOR 1 IN. COPPER TUBING) 3-7/8 (98) 1-15/16 (49)
FLARE MODELS M N
3/8 IN NPT ONLY 4-5/8 (117) 2-5/8 (59)
FNPT MODELS P U
3/4 IN. 3-5/8 (98) 1-13/16 (46)
FLARE-TO-SWEAT UNION ADAPTER R S
FOR 1/2 IN. COPPER 6-3/16 (157) 3-29/32 (99)
FOR 3/4 IN. COPPER 6-7/16 (164) 4-13/16 (106)
Mount the valve directly in the tube or pipe. Make sure
that the flow through the valve is in the direction
indicated by the arrow stamped on the valve body.
On diverting valves, the three fittings or ports are
labeled on the bottom of the valve body casting. See
Fig. 2. Port AB is the inlet port and is open at all times.
Port A is closed when the valve is de-energized; port B
is open when the valve is de-energized. Refer to the
equipment manufacturer’s instructions to determine
which port (A or B) should be connected to the coil
bypass.
Fig. 2. Inlet and outlet ports on straight-through
and diverting valves.
FLARE FITTING MODELS
Use new, properly reamed pipe, free from chips. The
valve body is threaded for standard 5/8 in. OD copper,
45 degree SAE flare fitting nuts. These nuts are not
furnished with the valve and must be obtained
separately.
SWEAT COPPER MODELS
1. Use new, properly reamed pipe, free from dents
or corrosion.
2. Place the valve onto the pipe. Set the manual
opening lever to MAN. OPEN position before
applying heat. This protects the plug inside the
valve by removing it from the seat.
3. Sweat the joints, keeping the outer surface free
from solder. DO NOT use silver solder because of
the high melting temperature required.
95-6983EF—03 2
Fig. 3. Dimensions.
V4043, V4044, V8043 AND V8044 ZONE VALVES
CAUTION
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
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.
THERMOSTAT
R
W
1
L1
HOT
L2
24
TRANSFORMER
MOTOR
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
Fig. 4. Typical wiring for V8043E, V8044E.
YELLOW LEADS
AUXILIARY
SWITCH
TO BOILER TT
RED LEADS
M5953B
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.
OPERATION AND CHECKOUT
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
Fig. 5. Typical wiring for V8043F.
On 24 V systems, never jumper the valve coil
terminals even temporarily. This may burn
out the heat anticipator in the thermostat.
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 section. 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 insufficient water pressure.
NOTE: These hydronic valves are not suitable for use
in open loop systems where there is air exposure.
3 95-6983EF—03
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