Pilot Valve Proving; Introduction; Procedure; Option 1: On Startup With Skp25'S On Both The Pilot And Main Gas Trains - Siemens LMV5 Series Technical Instructions

Technical Instructions
Document No. LV5-8000

Pilot Valve Proving

Introduction

Valve proving detects if the main gas valves in a gas train are leaking. In addition to checking
the main gas valves, the pilot valves may be tested for leakage as well. There are three options
for performing pilot valve proving:

• Option 1: On Startup with SKP25's on both the Pilot and Main Gas Trains

• Option 2: On Startup, SKP25 on the Main Gas Train, Solenoid Valves on the Pilot Train
• Option 3: Pilot Valve Proving on Startup and Main Valve Proving on Shutdown
On the LMV5, valve proving of the main gas valves can be performed during startup, during
shutdown, or during both startup and shutdown of the boiler. If pilot valve proving is added
using Option 1 or Option 2, valve proving must be performed during startup of the boiler only.
If pilot valve proving is added using Option 3, valve proving must be performed during both
startup and shutdown of the boiler.
Pilot valve proving can be performed on any LMV52. Pilot valve proving can be performed on
any LMV51 with a date code of 140131xxxx (Jan 31, 2014) or later.

Procedure

1. The valve proving type can be set in the LMV5 through the following menu path:
Params & Display > BurnerControl > ValveProving > ValveProvingType
For Option 1 or Option 2, this must be set for "VP startup". For Option 3, this must be
set for "VP stup/shd".
2. In addition to setting the valve proving type, input terminal X9-03.2 must be set for a
valve proving pressure switch input. This can be done through the following menu path:
Params & Display > BurnerControl > ValveProving > Config_PS-VP/CPI = PS-VP
Appendix A Page 20
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