Honeywell SV2 Series User Manual page 63

system or VPS control performing the external valve proving sequence. Refer to
the VPS test screen.
Fig. 29: VPS Setup Screen.
The lowest possible leakage limit is set as the default, depending on the valve body size. This rate may be changed by the user as
applicable to the appliance type and size and the applicable codes. The following information can be found via the 'i' button on
the HMI or PC Tools for quick reference when on-site.
Below are some leakage limits for North American and the EU (European Union). If in doubt which leakage rate to enter, consult
the applicable codes for your appliance type and size.
• 1.00 CFH (= 28.3 l/h = 472 ml/min) equals leakage limit for a POC (proof of closure switch) per ANSI Z21.21-2012 / CSA 6.5-
2012 for automatic valves for gas appliances.
• 1.76 CFH (= 50 l/h = 833 ml/min) for EU or replacing a NOVV (normally open vent valve) per EN1643-2000-10 and
ISO23551-4
• Other: Per EN1643-2000-10, leakage rate starting over 50 l/h and up to a maximum value of 0.1% of the burner heat input
(0.1% of the fuel flow rate in l/h)
NOTE: Maximum valve leakage value is limited to:
• 50 l/h for 1 in (DN25) valves
• 142 l/h for 1.5 / 2 in (DN40/50) valves
• 283 l/h for 2.5 / 3 in (DN65/80) valves
NOTES:
• YOU MUST KEEP THE EXTERNAL VPS CONTROL DISABLED WHILE PROGRAMMING THE VPS SETUP AND PRESSURE
LIMITS if the wiring between the valve and burner management system is in place.
– The burner needs to be run in order to properly measure the pressure at the valve and thus set the Hi-Gas and Lo-Gas
limits accordingly.
– When the burner starts, the VPS control may try to perform the VPS test and thus lockout due to the Pressure Module
not being programmed or verified.
• When utilizing the VPS functionality with the Pressure Module, a NOVV (normally open vent valve) cannot be present
unless it is powered during the entire VPS test time. The SV2 Series valves do not provide for cycling the NOVV.
• The maximum allowed size per valve for external piping connected between V1 and V2 (such as for pilot take-off) is:
– ¾ in (DN20) for 1 in (DN25) valves
– 1 in (DN25) for 1.5 or 2 in (DN40/50) valves
• In order for the valve to be operational after setup is complete, the Verification of Safety Parameters procedure must be
completed.
SV2 Series Safety Shut-off Valves
V2F, V2V
SV2 SERIES SAFETY SHUT-OFF VALVES USER MANUAL
Fig. 29 for the VPS setup screen and
63
Fig. 30 for