Loading...Honeywell V8944L, V8944B, V8944N, V8943C, V8944C User Manual
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V4943/V8943B,C,N;
V4944/V8944B,C,L,N
Regulating Diaphragm Gas Valves
PRODUCT DATA
FEATURES
APPLICATION
The V4943/V8943B and N (single stage) and V4944/V8944B and N (two stage) are solenoid-operated diaphragm valves suitable for natural gas only. The V4943/V8943C and V4944/V8944C and L are solenoid-operated diaphragm valves suitable for Liquefied Petroleum (LP) gas only. These valves are used on boilers, unit heaters, duct furnaces, makeup air and rooftop heaters.
•Models are available for natural or liquid petroleum (LP) gases.
•Valve models L, N are rapid opening (less than six seconds) and fast closing, and are available for LP and natural gases, respectively.
•Line voltage with two-wire thermostat or controller is used with V4943; V8943 is used with 24V thermostat or controller.
•V4944 is used with line voltage dual-stage thermostat or controller; V8944 is used with 24V dual-stage thermostat or controller.
•Slow opening B,C valve models are available for natural and LP gases respectively.
•Valve closes on power failure; recommended for final shutoff service.
•Valve closing time: 2 seconds maximum at 7 inches wc inlet pressure.
•Valves rated for 0.5 pound per square inch (psi) (3.4 kPa).
•Leadwires and cover for electrical conduit connections are provided.
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Contents |
Application ........................................................................ |
1 |
Features ........................................................................... |
1 |
Specifications ................................................................... |
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Ordering Information ........................................................ |
2 |
Installation ........................................................................ |
6 |
Operation .......................................................................... |
9 |
Checkout and Troubleshooting ......................................... |
10 |
Service Information .......................................................... |
12 |
65-0214-08
V4943/V8943B,C,N; V4944/V8944B,C,L,N REGULATING DIAPHRAGM GAS VALVES
SPECIFICATIONS
Models:
All models are solenoid-operated regulating diaphragm gas valves. Details are shown in Table 1.
Table 1. Model Availability.
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Power |
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Maximum |
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Operating |
Opening |
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Number |
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Voltage |
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Consumption |
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and |
Maximum |
(VA |
Pipe Size |
Thread |
Pressure |
Time |
Pressure |
Type of |
of Lead- |
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Model |
Frequency |
Current |
Maximum) |
(in.) |
Type |
psi |
kPa |
(sec.) |
Regulation |
Gas |
wires |
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V4943B |
120V |
0.055A |
6.6 |
1, 1-1/4, |
NPT |
0.5 |
3.4 |
3 to 25 |
Single |
Naturala |
2 |
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(+10%, |
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1-1/2, 2 |
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stage |
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-15%), |
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V4943N |
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1, 1-1/4, |
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<6 |
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60 Hz |
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1-1/2 |
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V8943B |
24V,(+10%, |
0.363A |
9.0 |
1, 1-1/4, |
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3 to 25 |
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-15%) |
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1-1/2, 2 |
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50/60 Hz |
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V8943C |
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1, 1-1/4 |
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LP |
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V8943N |
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1, 1-1/4, |
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<6 |
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Naturala |
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1-1/2 |
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V4944B |
120V |
0.077A |
9.0 |
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3 to 25 |
Two stage |
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3 |
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(+10%, |
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V4944C |
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LP |
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-15%) |
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V4944L |
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1-1/4 |
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<6 |
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60 Hz |
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V4944N |
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1, 1-1/4, |
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Naturala |
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1-1/2, 2 |
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V8944B |
24V |
0.470A |
11.3 |
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3 to 25 |
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(+10%, |
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V8944C |
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1, 1-1/4, |
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LP |
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-15%) |
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1-1/2 |
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50/60 hz |
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V8944L |
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1, 1-1/4 |
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<6 |
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V8944N |
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1, 1-1/4, |
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Naturala |
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1-1/2, 2 |
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a Includes natural gas, mixed air-natural gas, LP gas-air.
Flow Capacity: See Table 2.
Table 2. V4/8943 and V4/8944 Flow Capacity.
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CSA |
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Regulation Capacities |
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Certified |
Btuh per |
0.64 sp gr Natural Gas |
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1.0 in. pd |
1000 cfh |
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Maximum |
Minimum |
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Pipe Size |
Natural |
Natural |
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(in.) |
Gas cfh |
gas |
cfh |
cfh |
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1 |
1,000 |
1,000,000 |
1,000 |
300 |
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1-1/4 |
1,600 |
1,600,000 |
1,600 |
480 |
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1-1/2 |
2,300 |
2,300,000 |
2,300 |
780 |
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2 |
3,000 |
3,000,000 |
3,000 |
870 |
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Valve Pattern:Straight-through, non offset.
Valve Body Material:Die-cast aluminum.
Electrical Terminations:1/4 in. (6 mm) spade terminals (quick connects). Leadwires and cover for electrical conduit connections are provided.
Valve Closing Time: On power failure, a maximum of 2 seconds at 7 in. wc inlet pressure.
Ambient Temperature Ratings: -40°F to +150°F (-40°C to +66°C).
Maximum Fluid Temperatures: 150°F (66°C).
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the TRADELINE® Catalog or price sheets for complete ordering number. 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 Environmental and Combustion Controls Sales Office (check white pages of your phone directory).
2.Honeywell Customer Care 1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
3.http://customer.honeywell.com or http://customer.honeywell.ca
International Sales and Service Offices in all principal cities of the world. Manufacturing in Belgium, Canada, China, Czech Republic, Germany, Hungary, Italy, Mexico, Netherlands, United Kingdom, and United States.
65-0214—08 |
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V4943/V8943B,C,N; V4944/V8944B,C,L,N REGULATING DIAPHRAGM GAS VALVES |
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Pressure Reference Port Vent: 5/16–24 UNF internal |
Weight: |
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tapping. |
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1 in., 1-1/4 in. valves: 4 lb (1.8 kg). |
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Standard Factory Settings: See Table 3. |
1-1/2 in., 2 in. valves: 5 lb (2.3 kg). |
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Dimensions: See Fig. 1. |
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Table 3. Factory Settings and Regulation Ranges. |
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Natural Gas (i.e. B, N models) |
LP Gas (i.e. C, L models) |
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Firing stagesa |
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Factory Setting |
Adj. Rangeb |
Factory Setting |
Adj. Rangeb |
Low Fire: |
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Standard Models |
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0.8” wc |
0.8” to 2” wc |
1.4” wc |
1.4” to 4.2” wc |
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Special Models (Group 1) |
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1.6” wc |
1.6” to 4.2” wc |
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Special Models (Group 2) |
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0.8” wc |
0.8” to 2” wc |
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Special Models (Group 3) |
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0.8” wc |
0.8” to 2” wc |
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High Fire: |
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Standard Models |
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3.5” wc |
3” to 4.5” wc |
10” wc |
8.8” to 11.5” wc |
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Special Models (Group 1) |
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3.5” wc |
3” to 4.5” wc |
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Special Models (Group 2) |
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3.5” wc |
1.4” to 4.2” wc |
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Special Models (Group 3) |
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5” wc |
4.0” to 7” wc |
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aV4943 is a single-stage valve, please refer to “High Fire” for spring specifications.
bDo not adjust or operate valve outside of the specified ranges.
CAUTION
DO NOT adjust or operate valve outside of the specified ranges. Valve will not regulate or work properly.
Special Models (Group 1): V4944B1075, V4944B1083, V4944B1091, V8944B1092, V8944B1100, V8944B1118
Special Models (Group 2): V4944B1109, V4944B1125, V4944B1141, V4944B1166; V4943B1050, V4943B1068, V4943B1076, V4943B1084
Special Models (Group 3): V4944B1117, V4944B1133, V4944B1158; V4943B1092, V4943B1100, V4943B1118
Approvals:
Underwriters Laboratories Listed: File Number MH1639
CSA Certified: Report Number C2030020 (except those listed as Special Models Group 2 and Special Models Group 3) Commonwealth of Massachusetts Product Certification Number: G1-12-05-22
Mounting Position: |
Accessories: |
Standard Position: Upright (horizontal). |
AT72D Transformer (40 VA) for all 24 Vac models. |
NOTE: V4944B1059, V4944N1052 and V4944N1060 can |
204480 Vent Pipe Adapter |
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be mounted upright to 90 degrees from the |
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upright on the horizontal axis with respect to the |
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inlet connection. |
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3 |
65-0214—08 |
V4943/V8943B,C,N; V4944/V8944B,C,L,N REGULATING DIAPHRAGM GAS VALVES
SIDE VIEW |
TOP VIEW |
6 (152)
6-9/16 (167)
FOR 1, 1-1/4
6 OR (152)
7-3/8 (187) FOR 1-1/2, 2
INLET |
OUTLET |
PRESSURE |
PRESSURE |
TAP |
TAP |
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Fig. 1. V4943/44 and V8943/44 dimensions in in. (mm). |
PRESSURE REGULATOR ADJUSTMENT CAPS
ATMOSPHERIC PRESSURE REFERENCE PORT WITH INTERNAL VENT LIMITER
M23375
Gas Valve Sizing
1.Check the burner nameplate for:
a.the type of gas used, and
b.the gas flow capacity. The capacity will be listed in British thermal units per hour (Btuh) or in cubic feet per hour (cfh).
2.Contact the local gas utility for information regarding:
a.the specific gravity (sp gr) and
b.the Btu per cubic foot (Btucf) for the type of gas used.
3.Find the capacity in cf/h. If the capacity is listed in Btu, convert to cf/h using the following formula:
Capacity in cfh = Btuh (burner nameplate)
Btu/cf (gas utility)
4.For gases with specific gravities other than 0.64, multiply the burner cf/h using the proper conversion factor in Table 4.
Table 4. Gas Conversion Factors.
Type of Gas |
sp gr (average) |
Multiply cfh by |
Manufactured |
0.60 |
0.968 |
Mixed |
0.70 |
1.046 |
LP-Propane |
1.53 |
1.546 |
LP-Butane |
1.98 |
1.759 |
5.Use the corrected burner capacity in cfh when determining the gas valve size in Figs. 2–9.
6.Determine the maximum pressure drop across the valve and draw a vertical line at this pressure in Figs. 2–9.
7.At the point of intersection of the vertical line and the curve, draw a horizontal line to intersect the flow (capacity) scale. The point of intersection indicates the capacity that can be obtained with the maximum pressure drop.
8.If the capacity at the maximum pressure drop is insufficient, use the capacity vs. pressure drop curve for the next larger valve size and repeat steps 6 and 7.
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1 INCH V4/8944B/N REGULATION AREA |
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100 |
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WC) |
10 |
PO > 2 IN. |
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DROP (IN. |
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ANY PO |
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PRESSURE |
1 |
PO < 2.5 IN. |
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0.1 |
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100 |
1000 |
10000 |
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FLOW NATURAL GAS (CFH) |
M23376 |
Fig. 2. Capacity vs. pressure drop of Natural Gas curves for 1 in. valve.
65-0214—08 |
4 |
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