What is Valve Proving
VPS provides an automatic means of testing valve seat integrity of a double valve series arrangement. The test occurs each burner cycle during Pre Purge, Post Purge and/or Standby, depending on the control and the user selected interval schedule. Providing maximum user flexibility, VPS may be scheduled to occur at one of five different intervals; Never, Before, After, Both or Split. Refer to the Installation Instructions for further detail. Honeywell’s VPS process consists of systematically sequencing first the downstream main safety shut-off valve (MV2) and then the upstream main safety shut-off valve (MV1), and monitoring reaction of the pressure switch, which is located between them. System Lockout and Alarm occurs if either valve fails its pressure monitoring sequence, preventing burner start-up.
Honeywell’s VPS is designed to detect a leak greater than 0.1% of the burner input capacity
As you prepare for your heating system start-ups, you may want to consider valve proving for your automatic safety shut off system. Honeywell, the leaders in combustion control systems provide the latest control strategy in their RM7800 Series control. read more about it and call TFC if we can provide you with a quote for an updated gas valve train! TIP : Remember too that an enhanced keyboard is required to set up and review the VPS set up and if you are using an older model keyboard, this selection will not show as available.