Dwyer Minihelic II Air Filter Gages - Manual

Operating Instructions for Minihelic ® II Differential
Pressure Gages are included in Bulletin A-36 packed
with each gage. This kit is designed for gages with
standard barbed connections. If your gage has
optional male pipe threads, purchase (2) 1/8˝ x 1/8˝
NPT elbows to replace fittings included.
Minihelic ® II Air Filter Gages
Specifications - Installation and Operating Instructions
Bulletin A-37
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: [email protected]
Part Number
1
2
3
4
5
6
Description
Static Pressure Tip with integral 1/4˝
compression fitting. 2 included.
5´length 1/4˝ diameter aluminum
tubing. 2 included.
Surface Mounting Bracket. 20 ga. steel
with flat black finish.
#6 x 3/4˝ Pan Head sheet metal screw.
4 included.
1/8˝ NPT female adapter elbow. 2
included.
2 Way Vent Valve 1/8˝ NPT male x 1/4˝
compression fitting. 2 included
INSTALLATION PROCEDURE
1. Drill two 7/16˝ diameter holes in duct, one on either
side of filter and at least 12˝ upstream and downstream.*
Install static pressure fittings as shown above with tips
pointing into the air stream.
2. Attach Minihelic ® II gage to mounting bracket using
studs and nuts supplied with gage.
3. Thread two-way vent valves into adapter elbows.
Handle of valve must align with remaining opening in
elbow when tight. Press completed assemblies onto
barbed connections at rear of gage as shown above.
4. Select a vertical plumb mounting surface for the gage
within 5 ft of the static tips. Location should be
reasonably free of vibration which can cause gage
pointer to oscillate. Attach bracket to surface with 4 sheet
metal screws supplied.
5. Cut aluminum tubing to length and connect between
static pressure tips and gage. The tip on the upstream
side of the filter is connected to the high pressure gage
connection.
6. Turn handles of both valves to “vent” position and
check gage for zero reading. Adjust if necessary
following instructions in bulletin A-36. Turn valves to
“line” or on position and read pressure drop. Periodically
re-check zero point to assure accuracy.
PARTS LIST/A-609 KIT
LOW PRESSURE LINE
HIGH PRESSURE LINE
1-9/16
[39.69]
2-1/4
[57.15]
2X #60 HOLES
Ш3/64 [Ш.047]
AIR
FLOW
2
[50.8]
4
[101.6]
FILTER
WALL
3-5/8
[92.08]
3-1/4
[82.55]
3-7/32
[81.76]
1-7/16
[36.51]
2
F
IL
T
E
R
E
L
E
M
E
N
T
1
6
5
4
3
AIR
FLOW