RadonAway 28003 Fan Selection Diagnostic Aid Kit Instructions
- June 9, 2024
- RadonAway
Table of Contents
RadonAway 28003 Fan Selection Diagnostic Aid Kit
INTRODUCTION
This diagnostic procedure is intended to assist in system design and fan selection for subslab depressurization (suction) radon mitigation systems. It provides a simple method by which one may derive information about the natureof the material below a concrete slab floor. It requires only one slab penetration and can be easily performed unassisted by one person in a few minutes. For maximum information it should be used in conjunction with communications testing; however, where this is not feasible or desired it may be used as a stand-alone test.
KIT CONTENTS
- One (1) Dwyer 0-100” magnehelic gauge (magnehelic) with accessories
- One (1) Dwyer magnehelic carrying case with accessories
- One (1) set of instructions
OTHER REQUIRED EQUIPMENT & MATERIALS
Vacuum Cleaner with 1 1/4” hose and suction wand. It is recommended that a
canister-type vacuum cleaner capable of approximately 50” of water column
suction be used (Eureka Mity Mite 3 HP or equivalent). The vacuum cleaner
should use standard 1 1/4” vacuum hose.
ASSEMBLY
MAGNEHELIC & CARRYING KIT
See Dwyer instructions accompanying 0-100″ magnehelic. Using 1/8″ NPT pipe
plugs provided plug both high and low pressure tap holes on back of
magnehelic. Attach the magnehelic to the metal plate provided with the
carrying kit using No. 6-32 machine screw also provided with the carrying kit.
PRESSURE CONNECTIONS
There are two 1/8″ NPT brass pipe adaptor plugs to rubber tubing (small brass
nipples) provided with the magnehelic. Insert one into low pressure tap hole
on side of magnehelic. High pressure tap hole should be left open.
VACUUM CLEANER CONNECTION
The second 1/8″ NPT brass pipe adaptor plug to rubber tubing (small brass
nipple) is to be inserted in the vacuum line of the vacuum cleaner that is to
be used. This is most easily accomplished by drilling a 3/8″ hole in one of
the vacuum cleaner “wands”. The brass nipple may then be screwed tightly into
the hole (do not overtighten). To an airtight seal silicone caulk may be used.
GNOSTIC TESTING
REFERENCE SUCTION
Connect one end of rubber tubing supplied with carrying kit to the brass
nipple on the low pressure side of the magnehelic. Connect the other end·of
rubber tubing to the brass nipple on the vacuum line of the vacuum cleaner.
Turn on the vacuum cleaner. To determine
accomplished by placing one’s hand over the opening). Note the suction
indicated on the
Note: This reference suction should be determined each time a diagnosis is
performed since the maximum suction of any given vacuum cleaner will vary with
many factors. To maintain consistency it is recommended that a new clean
vacuum cleaner bag be used.
TESTING THE SUBSLAB MATERIAL
Connect the vacuum line of the vacuum cleaner to a penetration in the concrete
slab as shown in the figure below. It is important to ensure a good seal
between the vacuum line and the slab.
Turn on the vacuum cleaner. Make sure there is no leakage of outside air into
the vacuum line and that all the air is coming from the subslab. Record the
suction indicated on the magnehelic
VACUUM CLEANER SUCTION TEST
ANALYSIS
Calculate the percentage of maximum vacuum cleaner suction that is encountered at the slab equation is:
Percentage of Maximum Suction= (PHole/PMax)x 100
Having obtained this percentage the chart on the next page may be used to
provide guidance on likely subslab material, communication and reasonable fan
choices.
Note: The chart starts at 25%. This is because at open flow the
magnehelic will register roughly 25% of PMax-) The chart is intended to
provide general guidelines on fan selection. Actual fan selection will be
influenced by other factors such as cost, availability, appearance, building
restrictions, etc.
POTENTIAL PITFALLS
One must be somewhat careful in drawing conclusions and designing the mitigation system based on this diagnostic procedure. Other factors may cause the results to be misleading. These include:
- Slab condition
- Foundation structure such as subslab strip footers
- Variations in subslab permeability across the slab
- Air sources such as drain fields
- Ground water
Communications testing can often detect the presence of some of these conditions. Good system design should deal with all factors and allow the mitigator to price the system appropriately.
WARRANTIES AND REPRESENTATIONS
Subject to applicable consumer protection legislation, RadonAway, Inc.
warrants that this test kit will be free from defective materials and
workmanship for a period of (1) year from the date of purchase. Warranty is
contingent on use in accordance with the instructions provided. This warranty
does not apply where repairs or alterations have been made or attempted by
others; or the equipment has been abused or misused. Warranty does not include
damage in shipment unless the damage is due to the negligence of RadonAway,
Inc. To make a claim under these limited warranties, you must return the
defective item to RadonAway, Inc. with a copy of the purchase receipt. All
other warranties, expressed or written, are not valid.
This diagnostic aid kit is intended for use by trained Radon professionals.
These instruction
are the sole responsibility of the user. RadonAway makes no representations or
guarantees as to the accuracy of such interpretation.
INSTRUCTIONS FAN SELECTION DIAGNOSTIC AID KIT
FAN SELEC TION CHART
PERCENTAGE OF MAXIMUM SUCTION OF
VACUUM
3 Saber Way, Ward Hill MA 01835 | Radonaway.com