Quick Links
High Capacity Direct Ignition
Combination Gas Controls
These high capacity direct ignition combina-
tion gas controls are used in gas-fired appliances.
This gas control consists of two valves assembled
in parallel on a die-cast manifold to provide high
capacity. Each valve includes a manual valve and
two automatic operators. A non-removable elec-
trical harness connects both valves. Do not alter
or remove this harness. Two pigtail leads (with
1/4-inch quick connects) provide for field con-
nection. Valves have fixed pressure regulation
and are not adjustable.
It is recommended that an appliance shutoff valve
be installed upstream of the VR8405.
Gas controls are available for natural gas and LP;
they are not convertible from one gas to another.
Used with S89C,E,F and S87 series 5 and later.
Used with 24 Vac heating appliances that burn
natural or liquefied petroleum (LP) gas.
Capacity rated up to 500 feet
3
sure drop [14.2 meters
/hour at 0.25 kPa]. Maximum
capacity rated up to 720 feet
hour]. Minimum capacity rated 200 feet
3
[5.7 meters
/hour].
Solenoid operated dual first automatic valves open
on thermostat call for heat and close when call for
heat ends.
Diaphragm-operated second automatic valves open
under control of the regulator and close if gas or
power supply is interrupted.
Two-position gas control knobs have ON and OFF
positions.
All adjustments and wiring connections accessible
from top of the control.
Straight-through body pattern.
Available in 3/4 x 3/4 in., 3/4 x 1 in., and 1 x 1 in.
inlet and outlet.
Dual Automatic Valve
3
/hour at 1 inch wc pres-
3
3
/hour [20.3 meters
/
3
/hour
G.S. • 7-94 • ©Honeywell Inc. 1994 • Form Number 68-0150
Non-adjustable servo regulator effectively maintains
almost constant gas output pressure under wide fluc-
tuations in gas supply pressure.
Inlet screen included.
May be installed at any angle between 0 and 90 de-
grees from the upright position, including vertically.
1/4 in. male quick-connect for electrical connections.
-40° F to 175° F [-40° C to 79° C] temperature
range. (VR8405H 0° F to 175° F [-18° C to 79° C]).
Inlet and outlet pressure taps included; both taps
accessible from top of control.
Standard, slow and step-opening models available.
3/4 in. x 1 in. bushings are available to reduce the
inlet and outlet of the entire gas control.
CONTENTS
Specifications ................................................. 2
Ordering Information ..................................... 2
Installation ..................................................... 4
Startup and Checkout ..................................... 7
Maintenance ................................................... 9
Operation ....................................................... 9
Service .......................................................... 11
1
VR8405
68-0150
Related Manuals for Honeywell VR8405
Summary of Contents for Honeywell VR8405
-
Page 1: Table Of Contents
Available in 3/4 x 3/4 in., 3/4 x 1 in., and 1 x 1 in. Startup and Checkout ........7 inlet and outlet. Maintenance ........... 9 Operation ............9 Service ............11 G.S. • 7-94 • ©Honeywell Inc. 1994 • Form Number 68-0150 68-0150... -
Page 2: Specifications
If you have additional questions, need further information, or would like to comment on our products or services, please write or phone: 1. Your local Honeywell Home and Building Control Division Sales Office (check white pages of your phone directory). - Page 3 APPROVALS: Propane 1.53 1.62 American Gas Association design certificate: L2025009. Canadian Gas Association design certificate: L2025009. Underwriters Laboratories Inc.: MH8191. Fig. 1—VR8405 dimensions in in. [mm]. 4 3/8 [112] [56] [21] SWING RADIUS 1/4 INCH MALE QUICK CONNECTS (2) 5 [127]...
-
Page 4: Installation
6. For complete device shutoff, both gas control It is recommended that an appliance shutoff valve be knobs must be in the OFF position. For complete installed upstream of the VR8405. Refer to the instructions appliance shutoff, turn off the upstream appli- provided by the valve manufacturer. - Page 5 VR8405 INSTALLATION 5. Remove seals over gas control inlet and outlet if Fig. 2—Install sediment trap. necessary. 6. Connect pipe to gas control inlet and outlet. Use a DROP wrench on the manifold rather than on the gas control. PIPED Refer to Figs.
- Page 6 VR8405 INSTALLATION Fig. 5—Proper use of wrench on gas control manifold. APPLY WRENCH TO MANIFOLD ONLY M9368 Fig. 6—VR8405 wiring connections in S87 Direct Ignition System. (HOT) S87 CONTROL MODULE ALARM, IF USED ALARM 24V (GND) VALVE VALVE MVPV VR8405...
-
Page 7: Startup And Checkout
VR8405 INSTALLATION • STARTUP AND CHECKOUT Fig. 7—VR8405 wiring connection in S89C Direct Ignition System. S89/S890 HOT SURFACE QUICK IGNITER CONTROL CONNECTS MVPV VR8405 COMBINATION MVPV GAS CONTROL VALVE VALVE (GND) HOT SURFACE IGNITER/SENSOR 24V (GND) Q354 FLAME SENSOR BURNER... - Page 8 VR8405 STARTUP AND CHECKOUT TURN ON GAS CONTROL are not adjustable. If the inlet pressure is in the normal Rotate the gas control knobs counterclockwise range (refer to Table 4), replace the entire gas control. Otherwise, take the necessary steps to provide proper gas pressure to the gas control.
-
Page 9: Maintenance
The VR8405 gas controls consist of two parallel valves main burner gas flow. Loss of power (thermostat satisfied) on a die-cast manifold to provide high capacity. The indi- de-energizes the DI module and closes the automatic valves. - Page 10 VR8405 OPERATION If main burner flame is restarted successfully, operation Standard-Opening Pressure Regulation (VR8405M) continues as described above. Gas control operation is de- During the ON cycle, the servo pressure regulator pro- scribed in more detail below. vides close control of outlet pressure, even if inlet pressure and flow rate vary widely.
-
Page 11: Service
VR8405 OPERATION • SERVICE pressure to the main burner increases gradually from 0 in. wc pressure regulator maintains the desired full-rate outlet [0 kPa] to rated output pressure within 3 to 6 seconds (for an pressure as described for the standard regulator. - Page 12 Home and Building Control Home and Building Control Helping You Control Your World Honeywell Inc. Honeywell Limited—Honeywell Limitée 1985 Douglas Drive North 740 Ellesmere Road Golden Valley, MN 55422 Scarborough, Ontario M1P 2V9...