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Page 54
The Viking Corporation, 210 N Industrial Park Road, Hastings MI 49058
Telephone: 269-945-9501 Technical Services 877-384-5464 Fax: 269-945-4495 Email: techsvcs@vikingcorp.com
A. Installation
The AV-1 shall be installed at all high points of the ESFR Cold Storage piping, including branch
lines and main feed lines.
In order to install the AV-1 assembly in the space from the ceiling to the sprinkler, the isolation
ball valve and strainer must be installed in the horizontal position as illustrated in Figure 2 and
the AV-1 must be installed with the (2) outlet connections at the top location. This position is
critical in order to allow the float within the device to operate properly.
The outlet connection needs to be piped using 3/8" (9.5 mm) outside diameter plastic or copper
tubing unrestricted downward and away from protected product below. This is due to possible
small amounts of moisture that could spurt out during venting of the system. Copper is recom-
mended in order to function during and after fire situations and long-lasting durability. Attach to
the ½" NPT vent connection as shown in Figure 32.
B. Ordering Information
Model AV-1 Valve and Trim Kit: Part Number 13495
Model AV-1 Vent Valve Only: Part Number 13494
C. Inspections, Tests and Maintenance
1.
The top inlet connection can be used as a sampling discharge connection that can be
piped to a floor level location, or attach a manual bleed valve to take sample antifreeze
from desired locations. If this connection is not being used, then it must be plugged with
the pipe plug furnished with product.
2.
Regular inspection for leakage from the discharge outlet and plugging of the strainer is
recomended. By shutting off the isolation valve, open strainer screen plug, drain liquid
from the assembly, the float should open. Check the strainer for debris, clean. and re-
assemble. Open the isolation valve slowly and make sure the AV-1 vents and shuts off
when filling with liquid. Opening the isolation valve slowly will prevent the alarm system
from operating due to fast liquid flow past the sprinkler system alarm valve.
3.
When using the outlet connection as a sample point for the antifreeze system, allow to
flow long enough to obtain solution sample from the branch pipe area and not from the
drop leg of the sample tube.
4.
It is normal on hydronic systems to have no discharge from the auto vent valves.
5.
During routine maintenance of the unit, observe air flow from the vent during recharge
of the AV-1. During proper operation, air will flow from outlet followed by a small amount
of liquid, then shut off.
6.
If debris is collected on the seat, liquid leakage will occur. Isolate with the ball valve.
Remove the AV-1 and back flush using clean water through the outlet vent connection
to flush out scale and debris. Re-check operation before reinstallation. If there is still
improper function, replacement of the AV-1 valve is required.
Table 16 - Discharge of Air Through an Orifice at Standard Atmospheric Pressure of 14.7 PSI and 70 °F
Pressure
5
(0.34)
(1.38)
Psi (bar)
Air flow
2.58
SCFM (L/sec)
(1.22)
(2.36)
SCFM =
TECHNICAL DATA
20
40
50
60
(2.76)
(3.45)
(4.14)
4.99
7.71
9.24
10.80
(3.64)
(4.36)
(5.10)
(14.7+p)
____________
(CFM or ACFM)
X
14.7
70
80
90
(4.83)
(5.52)
(6.21)
12.30
13.80
15.30
(5.81)
(6.51)
(7.22)
520
_______
X
Where:
(460+t)
March 7, 2008
ESFR PRE-PRIMED SINGLE
INTERLOCK PREACTION
COLD STORAGE SYSTEM
100
110
125
150
(6.90)
(7.59)
(8.62)
(10.34)
16.70
18.20
20.50
24.20
(7.88)
(8.59)
(9.68)
(11.42)
p = gauge pressure of gas or vapor (psig)
t = temperature of gas or vapor (°F)
175
(12.07)
27.90
(13.17)
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