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V4943/V8943B,C,N; V4944/V8944B,C,L,N REGULATING DIAPHRAGM GAS VALVES
3 65-0214—08
Pressure Reference Port Vent: 5/16–24 UNF internal
tapping.
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.
b
Do 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:
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.
204480 Vent Pipe Adapter
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
b
Factory Setting Adj. Range
b
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