Honeywell Home V8043C,D,F & G Motorized Zone Valves Installation Guide
- June 7, 2024
- Honeywell Home
Table of Contents
V8043C,D,F & G
Motorized Zone Valves
INSTALLATION INSTRUCTIONS
APPLICATION
The V8043 Motorized Zone Valve provides two-position (open-close) control of
supply water for baseboard radiation, convectors, fan-coil units, etc. It uses
a two-wire,
24-volt control circuit and requires an SPST thermostat. Integral end-switch
models permit the sequencing of auxiliary equipment.
FEATURES
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Quiet, dependable operation is provided by a motor-operated powerhead and swing-type ball valve.
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Unique rotating ball plug that seats on a different part of its surface on each closing.
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Closes against the flow of water to assure quiet operation.
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The manual opener moves the ball away from the seat allowing the valve to be installed without disassembly.
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Manual operation on power failure.
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Easy servicing because the entire powerhead assembly can be replaced without removing the valve body from the line.
Optional accessory fittings can be provided to facilitate convenient removal of the entire zone valve unit. -
Low power requirements allow four valves to be operated from a single 40 VA transformer.
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Integral end-switch on F & G models to permit sequencing of auxiliary equipment.
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Choice of sweat, female NPT and flare (with union-flare adapters) body styles.
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Compact construction permits fitting under the cover of most baseboards.
SPECIFICATIONS
Models:
V8043C – Normally closed.
V8043D – Normally open.
V8043F – Normally closed with integral line voltage end switch.
V8043G – Normally closed with integral low voltage end switch.
Body Styles: All models have straight-through patterns only. 1/2”, 3/4”,
or 1” sweat or female NPT, or 3/8” flare.
Inlet fittings can be provided with or without 1/16” diameter bypass or bleed.
Close-off Water Pressures and Capacity (Cv) Ratings:
All models – 50 psi for 1.0 Cv
20 psi for 3.5 Cv (Standard Rating)
8 psi for 8.0 Cv
Static Pressure Rating: Both 125 psi (VC8043C/D/F/G 1000 series) and 300
psi (V8043C/D/G 3300 series) models available.
Temperature Rating:
Liquid – 4° C to 93° C (40° F to 200° F).
Ambient – 4° C to 52° C (40° F to 125° F).
Steam – Consult your local Resideo representative.
Humidity Rating: 5-95% RH (non-condensing)
Atmosphere: non-corrosive, non-explosive
Wiring Connections:
‘C’ and ‘D’ Models – 2 low voltage 0.5 m (18 in.) lead wires with strain
relief.
‘F’ Model – 5 screw terminal board. Includes “blind” terminal for transformer
and thermostat wiring convenience. (See Fig. 4) It also includes an add-on
line voltage enclosure with conduit opening for end switch wiring.
‘G’ Model – 4 low voltage 0.5m (18 in.) lead wires with strain relief. Power
Requirements and Timing:
All models – 24 V, 50/60 Hz (cycles) 6 W nominal, 15 seconds to open, and 4-5
seconds to close. Order transformer separately. See alternate selection.
Transformer:
All models – AT72 or AT20B (maximum of 4 valves per
AT72 or 2 valves per AT20B).
Order transformers separately.
Auxiliary Switch Ratings:
‘G’ Model – 50 VA pilot duty at 24 Vac.
‘F’ Model – 4.4 Amps running at 120 Vac
Recommended Wall Thermostats:
Heating Only – T86A, T822D:
(T822C for normally open [N.O.] valves).
Cooling Only, or Heating-Cooling – T87F with Q539.| Thermostat Heater
Setting: For heat anticipation: 0.32 Amps.
Replacement Powerheads: 125 psi Models:
‘C’ Model – P/N 40003916-011
‘D’ Model – P/N 40003916-014
‘G’ Model – P/N 40003916-012
‘F’ Model – P/N 40003916-013
Replacement Motor:
24 Vac, 50/60 Hz Models – P/N 272748AB
24 Vac, 50/60 Hz, Plated Motor – P/N 272748ABP
Replacement End Switch:
Old Style (prior to 1978) requiring metal bracket -P/N
272744A
New Style – P/N 272744B
Replacement O-ring: P/N 272756A
NOTE: The standard valve is not recommended for steam service. Consult your
Resideo representative whenever steam applications are involved.
Accessories:
Flare-to-Sweat Union Adapters (sold in sets of 2)
3/8 Flare to 1/2 Sweat – P/N 272704A
3/8 Flare to 3/4 Sweat – P/N 272704B
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INSTALLATION
CAUTION
Normally it is not necessary to remove the powerhead from the valve body
during installation. The valve must be disassembled th the water flow arrow
pointing away from the manual opening or lever slot. Mounting The valve may
be mounted in any position on a vertical line. On a horizontal line, the valve
must be mounted so that the powerhead is even with or above the centerline of
the piping as shown in Fig. 3. Make sure that enough room is provided above
the powerhead to remove the cover for service. See Fig. 1.
Mount the valve directly in the pipe or tube. It must be installed so that the
arrow stamped on the valve body’s side corresponds to the flow direction. For
flare-fitting models, the body is threaded for standard 3/8 in. I.D. copper,
45 degrees SAE flare-fitting nuts. These nuts are not furnished with the valve
and must be obtained separately. For sweat copper fittings, make sure that
good solder connections are made. DO NOT use silver solder because of the high
melting temperature it requires.
IMPORTANT:
For normally closed models with sweat fittings, set the opener lever to ‘MAN.
OPEN’ before applying heat to the fittings. This will protect the plug inside
the valve by removing it from the seat. After installation, place the manual
opener in the ‘AUTO’ position.
NOTE: New Buna-N rubber ball plug is impervious to boiler or system additives.
Petroleum-based additives do not affect this ball plug. Steam applications
require special ball plugs. Consult your local Resideo representative.
REMOVING AND MOUNTING OF ACTUATOR FOR 300 PSI MODELS
REMOVING THE ACTUATOR FROM THE VALVE BODY
NOTE: It is not necessary to drain the system if the valve body assembly
remains in the pipeline.
- Turn power supply OFF. Disconnect electrical leads carefully, noting the position and color of each lead.
- Place the manual operating lever in the OPEN position.
- Remove the actuator by fully depressing the locking button and lifting it straight up.
MOUNTING THE ACTUATOR ON THE VALVE BODY
WIRING
All wiring must conform to local electrical codes and ordinances. Refer to
Fig. 4 to 7 for wiring connections.
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OPERATION
CAUTION
- Disconnect power supply before connecting wiring to prevent electrical shock and equipment damage.
- Never jumper the supply wires or actuator terminals even temporarily. This may damage the thermostat.
The actuator has three different manual settings: AUTO, OPEN and SWITCH (on
300 psi models only). In AUTO mode, the valve cycles with the thermostat and
activates the auxiliary switch when the valve is at full open.
In OPEN mode, the valve is opened to allow the system to be filled, flushed or
drained. The auxiliary switch is not activated. The valve returns to AUTO mode
when it is energized.
In SWITCH mode (on 300 psi models only), the valve is opened and the auxiliary
switch is activated to run the pump. The valve returns to AUTO mode when it is
energized.
NORMALLY CLOSED MODELS
With the manual opener set to AUTO and the powerhead energized, the valve is
opened as shown in Fig. 8-1. When the powerhead is de-energized, a spring
return mechanism drives the valve to the closed positions shown in Fig. 8-2.
The valve can also be opened with no electrical power by moving the manual
opener lever over the stop and pushing slowly and firmly to the ‘MAN. 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. See Fig. 8-1. When energized, the valve is closed as
shown in Fig. 8-2. A reverse-acting thermostat is required to control a
normally open valve.
Fig.
8. V8043 Operation for N.C. Valve.
Note: Inlet port is stamped ‘A’, outlet Port is stamped ‘B’ on the valve body.
NOTE : These hydronic valves are not suitable for use in open-loop
systems where there is air exposure.
Resideo Technologies, Inc.
1985 Douglas Drive North, Golden Valley, MN 55422
1-800-468-1502
95C-10926EF—04 M.S. Rev. 04-20 | Printed in the United States
www.resideo.com
