BLADDER TANK MODEL VFT & FT
INSTALLATION, OPERATION AND
MAINTENANCE MANUAL
(
foam concentrate inside the bladder
)
TECHNICAL
MANUAL
F_032216 16.1 | TM1.3.1.1/14032016/en
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
VISIT THE VIKING WEBSITE FOR THE LATEST EDITION OF THIS TECHNICAL MANUAL
Page 24 of 35
SECTION 8 – BLADDER TANK COMMISSIONING AND START-UP
Once the bladder tank is lled with foam it can be put in service for re protection purposes. In order to carry-out this step the
installer/end user must always perform the following actions:
1. The foam quantity inside the bladder tank must be measured/veried and be in accordance with the system design
requirements. For measurement instructions, please refer to Section 9;
2. The Concentrate Control Valve (if any) must be reset to the closed position. Please refer to the CCV manual for resetting
operations. If a functional test of the CCV is required, it should be made at this stage before pressurizing the bladder tank.
3. The pressure and owrate of the water supply line must be compared to the system’s pressure safety devices. The available
pressure at all ow rates should exceed the capacity of the system’s safety devices!!
4. The concentrate (12) and water (11) cut-off valves (shown in gure 3.3.1), that are currently in the closed position after the
lling operations must now be opened if the bladder tank is designated to operate automatically (i.e. without human operation
at the tank’s position).
Please ensure the valves are opened slowly. In order to avoid water or foam concentrate migration outside the bladder tank
due to siphoning, it is highly recommended that the connecting these valves to the system are constantly under pressure
5. The bladder tank is now ready to operate according to two designated scheme:
a. Automatic: the valves (12) and (11) are normally open, a CCV may be present, water ow through the mixer starts when
a master valve, either wet type, deluge, pre-action or manual, is opened. The CCV, activated by the master valve, opens
automatically and the foam concentrate ow starts;
b. Manual: the valves (12) and (11) are normally closed, a CCV is not present, water ow through the mixer starts when a
master valve, either wet type, deluge, pre-action or manual, is opened. The foam concentrate ow starts only when both the
valves (12) and (11) are opened.
6. Proportioning discharge tests should be made in accordance with the appropriate Installation Standards (i.e. NFPA, VdS,
LPCB, etc.) and / or FM Global Property Loss Prevention Data Sheet 4-12, Foam-Water Sprinkler Systems.
WARNING
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