Which normally closed valve would have to be at least partially open prior to actually lighting off a cold boiler as shown in the illustration? See illustration SG-0009.
A
J
B
F
C
D
D
C
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Question 1 / 205eccefa0bacbc34ba4d46f42
Question 1 of 205eccefa0bacbc34ba4d46f42
Which normally closed valve would have to be at least partially open prior to actually lighting off a cold boiler as shown in the illustration? See illustration SG-0009.
Which normally closed valve would have to be at least partially open prior to actually lighting off a cold boiler as shown in the illustration? See illustration SG-0009.