User Guide

V4943/V8943B,C,N; V4944/V8944B,C,L,N REGULATING DIAPHRAGM GAS VALVES
3 65-0214—5
Table 2. V4/8943 and V4/8944 Flow Capacity.
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).
Standard Factory Settings: See Table 3.
Dimensions: See Fig. 1.
Weight:
1 in., 1-1/4 in. valves: 4 lb (1.8 kg).
1-1/2 in., 2 in. valves: 5 lb (2.3 kg).
a
V4943 is a single-stage valve, please refer to “High Fire” for spring specifications.
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:
Standard Position: Upright (horizontal).
NOTE: V4944B1059, V4944N1052 and V4944N1060 can be
mounted upright to 90 degrees from the upright on
the horizontal axis with respect to the inlet
connection.
Accessories:
AT72D Transformer (40 VA) for all 24 Vac models.
Pipe Size
(in.)
CSA
Certified
1.0 in. pd
Natural
Gas cfh
Btuh per
1000 cfh
Natural
gas
Regulation Capacities
0.64 sp gr Natural Gas
Maximum
cfh
Minimum
cfh
1 1,000 1,000,000 1,000 300
1-1/4 1,600 1,600,000 1,600 480
1-1/2 2,300 2,300,000 2,300 780
2 3,000 3,000,000 3,000 870
Table 3. Factory Settings and Regulation Ranges.
Firing stages
a
Natural Gas (i.e. B, N models) LP Gas (i.e. C, L models)
Factory Setting Adj. Range Factory Setting Adj. Range
Low Fire:
Standard Models 0.8” wc 0.8” to 2” wc 1.4” wc 1.4” to 4.2” wc
Special Models (Group 1) 1.6” wc 1.6” to 4.2” wc
Special Models (Group 2) 0.8” wc 0.8” to 2” wc
Special Models (Group 3) 0.8” wc 0.8” to 2” wc
High Fire:
Standard Models 3.5” wc 3” to 4.5” wc 10” wc 8.8” to 11.5” wc
Special Models (Group 1) 3.5” wc 3” to 4.5” wc
Special Models (Group 2) 3.5” wc 1.4” to 4.2” wc
Special Models (Group 3) 5” wc 4.0” to 7” wc