DryAIR 2000-0250 User manual

Operators Manual
Water Heater Module
Model 2000-0250
# 003-703270
Oct 16/03
DRYAIR INC.
606 Highway Drive,
St. Brieux, SK., Canada, SOK 3V0,
Tel: [phone]
Fax: [phone]
[email protected]
DRYAIR INC.
1095 N. Main Street
Bowling Green, Ohio, USA, 43402
Tel: [phone]
Fax: [phone]
[email protected]

Table of Contents
Warranty Policies & Claim Procedures 1-1
Warranty Policies .............................................................................................................................................. 1-1
WarrantyClaimProcedure ................................................................................................................................ 1-2
Safety Concerns 2-1
General Safety Guidelines ................................................................................................................................. 2-1
Water Heater Module........................................................................................................................................ 2-1
Heat Transfer Fluid ........................................................................................................................................... 2-1
Material Safety Data Sheet................................................................................................................................ 2-2
Material Safety Data Sheet................................................................................................................................ 2-5
Introduction 3-1
DRYAIR Components ...................................................................................................................................... 3-1
Water Heater Module................................................................................................................................. 3-1
Powered Heat Transfer .............................................................................................................................. 3-1
Passive Heat Transfer ................................................................................................................................. 3-2
Accessories................................................................................................................................................ 3-2
How the DRYAIR System Works ...................................................................................................................... 3-3
Setup 4-1
Positioning and Handling of Water Heater Module............................................................................................. 4-1
Required Safety Clearances ............................................................................................................................... 4-1
Elevation Concerns ........................................................................................................................................... 4-1
Fuel Setup ........................................................................................................................................................ 4-2
Electrical Requirements & Connection .............................................................................................................. 4-2
Heat Transfer Fluid (HTF) ................................................................................................................................ 4-3
Primary Circulation Lines .................................................................................................................................. 4-3
Operation 5-1
Purging Air from the “HTF” Circulation System ................................................................................................ 5-1
Raising “HTF” Fluid to Set Temperature ........................................................................................................... 5-3
Water Heater Initial Firing................................................................................................................................. 5-4
Troubleshooting 6-1
Maintenance 7-1
Daily Checklist ................................................................................................................................................. 7-1
Seasonal Checklist ............................................................................................................................................ 7-2

Warranty Policy 1-1
Warranty Policies & Claim Procedures
DRYAIR Inc. (referred to within as DRYAIR) warranties its new, unused equipment to be free of defects in material and workmanship at the
time of delivery to the first retail purchaser.
Warranty Policies
Basic warranty policy
•DRYAIR will repair or replace, at its option, without charge, any defective part of the equipment for a period of twelve (12) months
from delivery to the first retail purchaser, F.O.B St. Brieux, SK, Canada or Bowling Green, Ohio, USA.
•Mileage is not covered. Any parts that are covered by an extended warranty published by DRYAIR are an exception to the Basic
Warranty policy and are to be warranted as per the details of the Extended Warranty Policy.
•Labor is covered as per DRYAIR flat labor rate.
•The Warranty Policy, terms and conditions, may change from time to time without prior notice.
•Warranty terms and conditions are transferable in the event of the sale to a second owner.
•Replacement parts will be warranted for 90 days from the repair date. Bill of sale must accompany the warranty claim.
Extended warranty policy
Water heater heat exchanger
•An extended warranty is available on the heat exchanger unit of the water heater assembly. The available warranty for a part, under the
extended warranty policy, is prorated by 20% per year.
•(Shipment date is the date to be used for the commencement of the warranty period).
•Coverage schedule
Year 1 - 100%
Year 2 - 80%
Year 3 - 60%
Year 4 - 40%
Year 5 - 20%
Exceptions to the warranty policies
•Under no circumstance shall the owner be entitled to recover costs for incidental, special or consequential damages such as, but not
limited to: loss of profit or revenue, other commercial losses, inconvenience and/or replacement equipment rental cost.
•Maintenance, repair or service items not related to warrantable defects.
•Loss or damage during shipping.
•Failure resulting from lack of or improper maintenance.
•Damage caused by operator abuse, negligence or improper operation.
•Damage resulting from improper voltage supply.
•Damage from improper installation. Installation done by other than the manufacturer.
•Non-defective items replaced at the request of the customer.
•Damage due to accidents.
•Damage resulting from improper fuel supply (i.e. pressure or contamination).
•Damage resulting from cracked or broken lines occurring during transport.
•Damage resulting from use of inadequate or improper fluids (i.e.. glycol or oil).
Owners obligations
•It is the responsibility of the owner, at the owner’s expense, to transport the equipment to the service facility of an authorized DRYAIR
distributor/dealer or alternately to reimburse the distributor/dealer, for any traveling expenses incurred in fulfilling this warranty.
•The terms of this Warranty Policy are subject to provincial and state legislation. DRYAIR reserves the right to make modifications in
accordance with provincial and state legislation without prior notice or obligation.
•It is the responsibility of the owner to read, understand and implement the maintenance, safety and operational guidelines as laid out in
the Operation and Maintenance Guide.
•All parts to be tagged with warranty claim number and shipped prepaid to DRYAIR within 30 days.
Manufacturer obligations
•DRYAIR reserves the right to continually improve and/or change the product’s parts or specifications at any time without notice or
obligation.
•The terms of this Warranty Policy are subject to provincial and state legislation. DRYAIR reserves the right to make modifications in
accordance with provincial and state legislation without prior notice or obligation.

Warranty Policy 1-2
Warranty Claim Procedure
•All warranty credits must be processed with the DRYAIR Warranty Claim Form.
•All warranty parts, unless otherwise specified, are to be returned to DRYAIR along with a completed Warranty Claim Form.
Note: Prior to returning warranty parts, please call for an authorization number and shipping instructions from the Warranty
Department in Canada.
•Location of Warranty Depots
USA Canada
DRYAIR Inc. DRYAIR Inc.
1095 N. Main Street 606 Highway Drive
Bowling Green, OH Box 126
43402 St. Brieux, SK
Ph. 1 [phone] S0K 3V0
Ph. 1 [phone]
•Each warranty claim should only refer to one Serial or Production Schedule numbered unit.
•Warranty parts are to be tagged with warranty claim number.
•When claiming for warranty labour, the allowable warranty labour rate will be $45.00/hour. The factory reserves the right to adjust the
number of hours claimed where deemed necessary.
•The factory may at times specify allowable labour for certain warranty procedures.
•Mileage and travel time, to and from the customer are not eligible for warranty credit.
•Freight charges for warranty parts are not eligible for warranty credit.
•Labour flat rates for component changes
Electrical components - .5 hour
Plumbing components - 1 hour
Electric motor changes - 1 hour
Note: Other labour charges will be at the discretion of DRYAIR.

Safety Concerns 2-1
SafetyConcerns
General Safety Guidelines
•Make certain that the operator reads and understands all the information in this manual.
•All unauthorized people must be kept away from the equipment when in operation.
•Maintain instructional and safety decals. Replace damaged decals.
•All guards must be in place when the equipment is in operation.
Water Heater Module
CAUTION! The water heater is a heating appliance.
•When dealing with any heating appliance, observe all posted warnings and cautions.
•Keep children and pets away from all piping and fuel accessories.
•The water heater housing panels must be kept closed when the system is operating. This prevents drafts from affecting water heater
operation.
Heat Transfer Fluid
Follow the following precautions and measures when working with “heat transfer fluid” (“DOWFROST* HTF” & “BOSS CHILL PG”).
Fluid handling precautions
•Ventilation .................... Good general ventilation should be sufficient for most conditions.
•Respiratory protection No respiratory protection should be needed.
•Skin protection............. For brief contact, no precautions other than clean body-covering clothing should be needed.
...................................... Use impervious gloves when prolonged or frequently repeated contact should occur.
•Eye Protection ............. Use safety glasses.
First aid measures
•Eyes ............................ Flush eyes with plenty of water.
•Skin ............................. Wash off in flowing water or shower.
•Ingestion...................... Induce vomiting if large amounts are ingested.
.................................... Consult medical personnel.
•Inhalation .................... Remove to fresh air if effects occur.
.................................... Consult a physician.
•Note to physician ....... No specific antidote.
.................................... Supportive care.
.................................... Treatment based on judgment of the physician in response to reactions of the patient.
For complete “heat transfer fluid” information, refer to the Material Safety Data Sheets for “Dowfrost HTF” & “Boss Chill PG” on
the following page.

Safety Concerns 2-2
Material Safety Data Sheet
BOSS CHILL PG
MSDS
Canadian Centre for Occupational Health and Safety
Issue: 2001-4 (November, 2001)
***MATERIAL SAFETY DATA***
1. CHEMICAL PRODUCT & COMPANY IDENTIFICATION
PRODUCT NAME:...................................... PROPYLENE GLYCOL INDUSTRIAL
PRODUCT CODE: ....................................... 70511
EFFECTIVE DATE:...................................... 05/23/03 DATE PRINTED 10/09/03 MSD: 000248
COMPANY IDENTIFICATION: ............... The Dow Chemical Company, Midland, MI 48674
EMERGENCY TELEPHONE NUMBER:.24-HOUR EMERGENCY PHONE NUMBER 989-636-4400
......................................................................... Customer Information Center: 800-258-2436
2. COMPOSITION/INFORMATION ON INGREDIENTS
Propylene glycol CAS# 000057-55-6 99%
3. HAZARDS IDENTIFICATION
EMERGENCY OVERVIEW: ....................... Colorless, odorless liquid. Toxic fumes released in fire situations.
POTENTIAL HEALTH EFFECTS: .................. (See Section 11 for toxicological data.)
EYE:......................................................................... May cause slight transient (temporary) eye irritation. Corneal injury is unlikely. Mists may
cause eye irritation.
SKIN:........................................................................Prolonged contact is essentially nonirritating to skin. A single prolonged skin exposure is not
likely to result in the material being absorbed through skin in harmful amounts. Repeated
exposures may cause flaking and softening of skin. May be absorbed in potentially harmful
amounts when applied in large quantities to severe burns (second or third degree) over large
areas of the body as part of a cream or other topical application. Absorption under such
circumstances can elevate serum osmolality and may result in osmotic shock.
INGESTION: ..........................................................Single dose oral toxicity is considered to be extremely low. No hazards anticipated from
swallowing small amounts incidental to normal handling operations.
INHALATION: ......................................................At room temperature, vapors are minimal due physical properties. Mists may cause irritation
of upper respiratory tract.
SYSTEMATIC: ......................................................(OTHER TARGET ORGAN) EFFECTS: Repeated excessive ingestion may cause central
nervous system effects.
CANCER INFORMATION:.................................Did not cause cancer in long-term animal studies.
TERATOLOGY (BIRTH DEFECTS): ............... Birth defects are unlikely. Exposures having no adverse effects on the mother should have
no effect on the fetus.
REPRODUCTIVE EFFECTS: .............................In animal studies, has been shown not to interfere with reproduction.
4. FIRST AID
EYE:......................................................................... Flush eyes with plenty of water.
SKIN:........................................................................Wash off in flowing water or shower.
INGESTION: ..........................................................No adverse effects anticipated by this route of exposure incidental to proper industrial
handling.
INHALATION: ......................................................Remove to fresh air if effects occur. Consult a physician
NOTE TO PHYSICIAN:...................................... No specific antidote. Supportive care. Treatment based on judgment of the physician in
response to reactions of the patient.
5. FIRE FIGHTING MEASURES
FLASH POINT: .................... 218°F, 103°C
METHOD USED:................. PMCC
FLAMMABLE LIMITS ..... LFT: 2.6%
LFL: 2.6%
UFL: 12.5%
HAZARDOUS COMBUSTION PRODUCTS: During a fire, smoke may contain the original material in addition to unidentified toxic
and/or irritating compounds. Hazardous combustion products may include and are not limited to: aldehydes, carbon monoxide.
OTHER FLAMMABILITY INFORMATION: Violent steam generation or eruption may occur upon application of direct water stream
to hot liquids. Spills of these organic liquids on hot fibrous insulations may lead to lowering of the autoignition temperatures
possibly resulting in spontaneous combustion.
EXTINGUISHING MEDIA: Water fog or fine spray, carbon dioxide, dry chemical, foam. Alcohol resistant foams (ATC type) are
preferred if available. General purpose synthetic foams (including AFFF) or protein foams may function, but much less effectively.
Do not use direct water stream. Will spread fire.
MEDIA TO BE AVOIDED: Do not use direct water stream.
FIRE FIGHTING INSTRUCTIONS: Keep people away. Isolate fire area and deny unnecessary entry. Burning liquids may be moved by
flushing with water to protect personnel and minimize property damage. Burning liquids may be extinguished by dilution with water.
Do not use direct water stream. May spread fire.
PROTECTIVE EQUIPMENT FOR FIRE FIGHTERS: Wear positive-pressure, self-contained breathing apparatus (SCBA) and protective
fire-fighting clothing (including fire-fighting helmet, coat, pants, boots, and gloves). If protective equipment is not available or not
used, fight fire from a protected location or safe distance.

Safety Concerns 2-3
6. ACCIDENTAL RELEASE MEASURE (See Section 15 for Regulatory Information)
PROTECT PEOPLE: Isolate area.
PROTECT THE ENVIRONMENT: Contain liquid to prevent contamination of soil, surface water or ground water.
CLEANUP: For small spills, clean up with absorbent material. Collect material in suitable and properly labeled open containers. For
large spills, dike and pump into suitable and properly labeled containers.
7. HANDLING AND STORAGE
HANDLING: Product handled hot may require additional ventilation or local exhaust. Product on surfaces can cause slippery
conditions.
STORAGE: Keep containers tightly closed when not in use. Store in stainless steel, aluminum, Plasite 3066 lined containers or 316
stainless steel. Store below 121°C, 250°F.
8. EXPOSURE CONTROLS/PERSONAL PROTECTION
ENGINEERING CONTROLS: Provide general and/or local exhaust ventilation to control airborne levels below exposure guidelines.
PERSONAL PROTECTIVE EQUIPMENT
EYE/FACE PROTECTION: Use safety glasses. Safety glasses should be sufficient for most operations; however, for misty operations
wear chemical goggles.
SKIN PROTECTION: For brief contact, no precautions other than clean body-covering clothing should be needed. Use impervious
gloves when prolonged or frequently repeated contact could occur.
RESPIRATORY PROTECTION: Atmospheric levels should be maintained below the exposure guideline. When respiration protection
is required for certain operations, use an approved air-purifying respirator. In misty atmospheres, use an approved mist respirator.
EXPOSURE GUIDELINE(S): Propylene glycol: AIHA WEEL is 50 ppm total, 10 mg/m3 aerosol only.
9. PHYSICAL AND CHEMICAL PROPERTIES
APPEARANCE:........................ Colorless liquid
ODOR: ......................................... Odorless
VAPOR PRESSURE: ................ 0.08 mmHg @ 20°C, 68°F
VAPOR DENSITY: ................... 2.62
BOILING POINT:..................... 370°F, 188°C
SOLUBILITY IN WATER: .... Complete
SPECIFIC GRAVITY: .............. 1.038 @ 20/20°C, 68°F
10. STABILITY AND REACTIVITY
CHEMICAL STABILITY: Stable.
CONDITIONS TO AVOID: Avoid temperatures above 121°C/250°F. Product can decompose at elevated temperatures.
INCOMPATIBILITY WITH OTHER MATERIALS: Avoid contact with oxidizing materials.
HAZARDOUS DECOMPOSITION PRODUCTS: When available oxygen is limited, as in a fire or heated to very high temperatures by
hot wire or plate, carbon monoxide and other hazardous compounds such as aldehydes might be generated,
HAZARDOUS POLYMERIZATION: Will not occur.
11. TOXICOLOGICAL INFORMATION (See Section 3 for Potential Health Effects. For detailed toxicological data, write or call the address
or non-emergency number shown in section 1)
SKIN: the LD50 for skin absorption in rabbits is greater than 10,000 mg/kg.
INGESTION: The oral LD50 for Female rats is about 20,000-34,000mg/kg.
MUTAGENICITY (EFFECTS ON GENETIC MATERIAL): Results of in vitro (test tube) mutagenicity tests have been negative.
Results of mutagenicity tests in animals have been negative.
12. ECOLOGICAL INFORMATION (For detailed Ecological data, write or call the address or non-emergency number shown in Section 1)
ENVIRONMENTAL FATE
MOVEMENT AND PARTITIONING: Based largely or completely on information for similar material(s), i.e. propylene glycol.
Bioconcentration potential is low (BCF less than 100 or Log Pow less than 3). Log octanol/water partition coefficient (log Pow) is
-0.92. Henry’s Law Constant (H) is 1.2E-8 atm.m3/mole.
DEGRADATION AND PERSISTENCE: Based largely or completely on information for similar material(s), i.e. propylene glycol.
Biodegradation under aerobic static laboratory conditions is high (BOD20 or BOD28/ThOD greater than 40%). Biodegradation is
expected to be achieved in a secondary waste-water treatment plant. 5-Day biochemical oxygen demand (BOD5) is 1.16 p/p. 20-
Day biochemical oxygen demand (BOD20) is 1.45 p/p. Theoretical oxygen demand (ThOD) is calculated to be 1.68 p/p.
Inhibitory concentration (IC50) in OECD Activated Sludge Respiration Inhibition Test (OECD Test No. 209) is greater than 1gm/L.
Degradation is expected in the atmospheric environment within minutes to hours.
ECOTOXICITY: Based largely or completely on information for similar material(s), i.e. propylene glycol. Material is practically
non-toxic to aquatic organisms on an acute basis (LC50 greater than 100 mg/L in most sensitive species).
Acute LC50 for fathead minnow (Pimephales promelas) is 46500-54900 mg/L.
Acute LC50 for guppy (Poecilia reticulata) is greater than 10000 mg/L.
Acute LC50 for water flea Daphnia magna is 4850-34400 mg/L.
Acute LC50 for rainbow trout (Oncorhynchus mykiss) is 44 ml/L (about 44000 mg/L).

Safety Concerns 2-4
13. DISPOSAL CONSIDERATION (See Section 15 for Regulatory Information)
DISPOSAL: DO NOT DUMP INTO ANY SEWERS, ON THE GROUND OR INTO ANY BODY OF WATER. All disposal methods must
be in compliance with all Federal, State/Provincial and local laws and regulations. Regulations may vary in different locations.
Waste characterizations and compliance with applicable laws are the responsibility solely of the waste generator. THE DOW
CHEMICAL COMPANY HAS NO CONTROL OVER THE MANAGEMENT PRACTICES OR MANUFACTURING PROCESS OF
PARTIES HANDLING OR USING THIS MATERIAL. THE INFORMATION PRESENTED HERE PERTAINS ONLY TO THE
PRODUCT AS SHIPPED IN ITS INTENDED CONDITION AS DESCRIBED IN MSDS SECTION 2 (Composition/Information on
Ingredients).
FOR UNUSED & UNCONTAMINATED PRODUCT, the preferred options include sending to a licensed, permitted: recycler,
reclaimer, incinerator or waste water treatment system.
As a service to its customers, Dow can provide names of information resources to help identify waste management companies and
other facilities which recycle, reprocess or manage chemicals or plastics, and that manage used drums. Telephone Dow’s Customer
Information Centre at 800-258-2436 or 989-832-1556 for further details.
14. TRANSPORT INFORMATION
DEPARTMENT OF TRANSPORT:
This product is not regulated by D.O.T. when shipped domestically by land
CANADIAN TDG INFORMATION:
For TDG regulatory information, if required, consult transportation regulations, product shipping papers, or your Dow representative.
15. REGULATORY INFORMATION (Not meant to be all-inclusive—selected regulations represented)
NOTICE: The information herein is presented in good faith and believed to be accurate as of the effective date shown above. However,
no warranty, express or implied is given. Regulatory requirements are subject to change and may differ from one location to
another; it is the buyer’s responsibility to ensure that its activities comply with federal, state or provincial, and local laws. The
following specified information is made for the purpose of complying with numerous federal, state or provincial, and local laws and
regulations. See other sections for health and safety information.
U.S. REGULATION
SARA 313 INFORMATION: To the best of our knowledge, this product contains no chemical subject to SARA Title III Section 313
supplier notification requirements.
SARA HAZARD CATEGORY: This product has been reviewed according to the EPA “Hazard Categories” promulgated under
Sections 311 and 312 of the Superfund Amendment and Reauthorization Act of 1986 (SARA Title III) and is considered, under
applicable definitions, to meet the following categories: Not to have met any hazard category.
TOXIC SUBSTANCES CONTROL ACT (TSCA):
All ingredients are on the TSCA inventory or are not required to be listed on the TSCA inventory.
STATE RIGHT-TO-KNOW: The following product components are cited on certain state lists as mentioned. Non-listed
components may be shown in the composition section of the MSDS.
REGULATORY INFORMATION:
CHEMICAL NAME CAS NUMBER LIST
1, 2-PROPANEDIOL 00057-55-6 PA1
PA1=Pennsylvania Hazardous Substance (present at greater than or equal to 1.0%).
OSHA HAZARD COMMUNICATION STANDARD:
This product is not a “Hazardous Chemical” as defined by the OSHA Hazard Communication Standard, 29 CFR 1910.1200.
CANADIAN REGULATIONS
WHMIS INFORMATION: The Canadian Workplace Hazardous Materials Information System (WHMIS) classification for this
product is: This product is not a “Controlled Product” under WHMIS.
16. OTHER INFORMATION
NATIONAL FIRE PROTECTION ASSOCIATION (NFPA) RATINGS:
Health 0
Flammability 1
Reactivity 0
MSDS STATUS: Revised Section 16.
* or ® Indicates a Trademark of The Dow Chemical Company
The Information Herein Is Given In Good Faith, But No Warranty, Express or Implied, Id Made. Consult The Dow Chemical
Company For Further Information.

Safety Concerns 2-5
Material Safety Data Sheet
DOWFROST* HEAT TRANSFER FLUID
MSDS
Canadian Centre for Occupational Health and Safety
Issue: 05/09/2002
Received: 09/10/2003
***MATERIAL SAFETY DATA***
1. CHEMICALPRODUCT &COMPANY IDENTIFICATION
PRODUCT NAME:...................................... DOWFROST* HEAT TRANSFER FLUID
MSDS#: .......................................................... 1376
EFFECTIVE DATE:...................................... 05/09/2002
COMPANY IDENTIFICATION: ............... The Dow Chemical Company
......................................................................... Midland, MI 48674
EMERGENCY TELEPHONE NUMBER:.24-HOUR EMERGENCY TELEPHONE NUMBER: [phone]
......................................................................... Customer Information Number: 1-800-258-2436
2. COMPOSITION/INFORMATION ON INGREDIENTS
Propylene glycol CAS# 000057-55-6 > 99%
Demineralized water CAS# 007732-18-5 < 5%
Dipotassium hydrogen phosphate CAS#007758-11-4 < 5%
3. HAZARDS DENITRIFICATION
EMERGENCY OVERVIEW: ............................... Colorless, liquid, mild odor. No significant hazards for emergency response are known.
POTENTIAL HEALTH EFFECTS ................... (See Section 11 for toxicological information and additional information about potential
health effects.)
EFFECTS OF SINGLE ACUTE OVEREXPOSURE
INHALATION: ......................................................At room temperature, exposure to vapor is minimal due to low volatility. Mist may
cause irritation of upper respiratory tract (nose and throat).
EYE CONTACT: ...................................................May cause slight temporary eye irritation. Corneal injury is unlikely.
SKIN CONTACT: ..................................................Prolonged contact is essentially nonirritating to skin. Repeated contact may cause
flaking and softening of skin.
SKIN ABSORPTION:............................................ Prolonged skin contact is unlikely to result in absorption of harmful amounts.
SWALLOWING: ....................................................Very low toxicity if swallowed. Harmful effects not anticipated from swallowing small
amounts
POTENTIAL ENVIRONMENTAL EFFECTS (See Section 12 for Ecological Information)
4. FIRST AID
INHALATION: ......................................................Move person to fresh air; if effects occur, consult a physician.
EYE:......................................................................... Flush eyes thoroughly with water for several minutes. Remove contact lenses after the initial
1-2 minutes and continue flushing for several additional minutes. If effect occur, consult a
physician, preferably an ophthalmologist.
SKIN:........................................................................Wash skin with plenty of water
INGESTION: ..........................................................No emergency medical treatment necessary.
NOTE TO PHYSICIAN:...................................... No specific antidote. Treatment of exposure should be directed at the control of symptoms
and the condition of the patient.
5. FIRE FIGHTING MEASURES
FLAMMABLE PROPERTIES (Refer to section 9, PHYSICAL AND CHEMICAL PROPERTIES)
EXTINGUISHING MEDIA: Water fog or fine spray. Dry chemical fire extinguishers. Carbon dioxide fire extinguishers. Foam. Do not
use direct water stream. May spread fire. Alcohol resistant foams (ATC type) are preferred. General purpose synthetic foams
(including AFFF) or protein foams may function, but will be less effective.
FIRE FIGHTING PROCEDURES: Keep people away. Isolate fire area and deny unnecessary entry. Use water spray to cool fire exposed
containers and fire affected zone until fire is out and danger of reignition has passed. Fight fire from a protected location or safe
distance. Consider the use of unmanned hose holders or monitor nozzles. Immediately withdraw all personnel from the area in case
of rising sound from venting safety device or discoloration of the container. Burning liquids may be extinguished by dilution with
water. Do not use direct water stream. May spread fire. Move container from fire area if this is possible without hazard. Burning
liquids may be moved by flushing with water to protect personnel and minimize property damage.
SPECIAL PROTECTIVE EQUIPMENT FOR FIRE FIGHTERS: Wear positive-pressure self-contained breathing apparatus (SCBA) and
protective fire-fighting clothing (including fire-fighting helmet, coat, pants, boots, and gloves). If protective equipment is not
available or not used, fight fire from a protected location or safe distance.
UNUSUAL FIRE AND EXPLOSION HAZARDS: Container may rupture from gas generation in a fire situation. Violent steam
generation or eruption may occur upon application of direct water stream to hot liquids. Liquid mist of this product can burn.
Flammable concentrations of vapor can accumulate at temperatures above flash point; see Section 9.
HAZARDOUS COMBUSTION PRODUCTS: During a fire, smoke may contain the original material in addition to combustion products
of varying composition which may be toxic and/or irritating. Combustion products may include and are not limited to: Carbon
monoxide. Carbon dioxide.

Safety Concerns 2-6
6. ACCIDENTAL RELEASE MEASURE
SMALL SPILLS: Absorb with materials such as: cat litter, sawdust, vermiculite, Zorb-all. Collect in suitable and properly labeled
containers.
LARGE SPILLS: Dike area to contain spill. Recover spilled material if possible. See Section 13, Disposal Considerations for additional
information.
PERSONAL PRECAUTIONS: Use appropriate safety equipment. For additional information, refer to Section 8, Exposure Controls and
Personal Protection.
ENVIRONMENTAL PRECAUTIONS: Prevent from entering into soil, ditches, sewers, waterways and/or groundwater. See Section 12,
Ecological Information.
7. HANDLING AND STORAGE
HANDLING
GENERAL HANDLING: See Section 8, EXPOSURE CONTROLS AND PERSONAL PROTECTION.
VENTILATION: Provide general and/or local exhaust ventilation to control airborne levels below the exposure guidelines.
OTHER PRECAUTIONS: Spills of these organic materials on hot fibrous insulations may lead to lowering of the autoignition
temperatures possibly resulting in spontaneous combustion.
STORAGE: 121°C ( 250° F). Do not store in: galvanized steel.
8. EXPOSURE CONTROLS AND PERSONAL PROTECTION
EXPOSURE LIMITS
COMPONENT EXPOSURE LIMITS SKIN FORM
Propylene glycol 10mg/m3 TWA8 AIHA WEEL Aerosol
50 ppm TWA8 AIHA WEEL Total Particulate fume
In the Exposure Limits Chart above, if there is no specific qualifier (i.e., Aerosol) listed in the Form Column for a particular limit, the
listed limit includes all airborne forms of the substance that can be inhaled.
PERSONAL PROTECTION
RESPIRATORY PROTECTION: Atmospheric levels should be maintained below the exposure guideline.
PROTECTION: When respiratory protection is required for certain operations, use an approved air-purifying respirator. In dusty or
misty atmospheres, use an approved particulate respirator.
EYE PROTECTION: Use safety glasses.
OTHER PROTECTIVE EQUIPMENT: No precautions other than body-covering clothing should be needed. Use gloves chemically
resistant to this material.
9. PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE:................. Liquid
APPEARANCE:........................ Colorless
ODOR: ......................................... Mild
FLASH POINT - Closed Cup: 102°C 216°F Tag closed cup ASTM D 56 (Propylene glycol)
FLAMMABLE LIMITS IN AIR: Lower 2.6%(V) 100°C(Propylene glycol)
...................................................... Upper 12.5%(V) 130°C (Propylene glycol)
AUTOIGNITION TEMP: ...... 416°C780°F
VAPOR PRESSURE: ................ 0.7 mmHg @ 20°C, 68°F
BOILING POINT (760 mmHg): 162°C323°F
VAPOR DENSITY (air=1):..... 2.6
SPECIFIC GRAVITY (H2O=1):1.05 20°C/20°C
FREEZING POINT: ................. <=-51°C<=-60°F
MELTING POINT:................... Not applicable (for liquids)
SOLUBILITY IN WATER (by weight): 100% 20°C
pH:................................................ 9-11 (5% solution in water)
EVAPORATION RATE (Butyl Acetate=1): 0.07
PERCENT VOLATILES:........ 98 Wt%
10. STABILITY AND REACTIVITY
STABILITY/INSTABILITY: Thermally stable at recommended temperatures and pressures.
CONDITIONS TO AVOID: Product can oxidize at elevated temperatures. Generation of gas during decomposition can cause pressure
in closed systems
INCOMPATIBLE MATERIALS: Avoid contact with: Strong acids. Strong bases. Strong oxidizers.
THERMAL DECOMPOSITION: Decomposition products depend upon temperature, air supply and the presence of other materials.
Decomposition products can include and are not limited to: Aldehydes. Alcohols. Ethers.
HAZARDOUS POLYMERIZATION: Will not occur

Safety Concerns 2-7
11. TOXICOLOGICAL INFORMATION
ACUTE TOXICITY: Peroral: Rat; female; LD50 = 20300 mg/kg
Percutaneous: Based on information for a similar material:
Rabbit; LD50 = > 10000 mg/kg
DEVELOPMENT TOXICITY: Contains component(s) which did not cause birth defects or any fetal effects in lab animals., The
component(s) is/are:,
REPRODUCTIVE TOXICITY: Contains component(s) which did not interfere with reproduction in animal studies., Contains
component(s) which did not interfere with fertility in animal studies., The component(s) is/are:, Propylene glycol.
CHRONIC TOXICITY AND CARCINOGENICITY: Similar formulations did not cause cancer in laboratory animals.
GENETIC TOXICOLOGY:In Vitro: In Vitro mutagenicity studies were negative.
In Vivo: Mutagenicity studies in animals were negative for component(s) tested
SIGNIFICANT DATA WITH POSSIBLE RELEVANCE TO HUMANS: In rare cases, repeated excessive exposure to propylene glycol
may cause central nervous system effects.
12. ECOLOGICAL INFORMATION
ENVIRONMENTAL FATE: Based largely or completely on information for: Propylene glycol. Material is readily biodegradable.
Passes OECD test(s) for ready biodegradability. Degradation is expected in the atmospheric environment within minutes to hours.
ECOTOXICITY: Based largely or completely on information for: Propylene glycol. Material is practically non-toxic to aquatic
organisms on an acute basis (LC50/EC50 . 100mg/L in most sensitive species tested).
FURTHER INFORMATION: Based largely or completely on information for: Propylene glycol. Bioconcentration potential is low
(BCF < 100 or Log Pow < 3). Potential for mobility in soil is very high (Koc between 0 and 50).
13. DISPOSAL CONSIDERATION (See Section 15 for Regulatory Information)
DISPOSAL: DO NOT DUMP INTO ANY SEWERS, ON THE GROUND OR INTO ANY BODY OF WATER. All disposal practices
must be in compliance with all Federal, State/Provincial and local laws and regulations. Regulations may vary in different locations.
Waste characterizations and compliance with applicable laws are the responsibility solely of the waste generator. THE DOW
CHEMICAL COMPANY HAS NO CONTROL OVER THE MANAGEMENT PRACTICES OR MANUFACTURING PROCESS OF
PARTIES HANDLING OR USING THIS MATERIAL. THE INFORMATION PRESENTED HERE PERTAINS ONLY TO THE
PRODUCT AS SHIPPED IN ITS INTENDED CONDITION AS DESCRIBED IN MSDS SECTION 2 (Composition/Information on
Ingredients). FOR UNUSED & UNCONTAMINATED PRODUCT, the preferred options include sending to a licensed, permitted:
recycler, reclaimer, incinerator or other thermal destructive device. As a service to its customers, Dow can provide names of
information resources to help identify waste management companies and other facilities which recycle, reprocess or manage
chemicals or plastics, and that manage used drums. Telephone Dow’s Customer Information Centre at 1-800-258-2436 or 0-989-
832-1556 (U.S.), or 1-800-331-6451 (Canada) for further details.
14. TRANSPORT INFORMATION
NON-BULK Proper Shipping Name: NOT REGULATED
BULK Proper Shipping Name: NOT REGULATED
The information is not intended to convey all specific regulatory or operational requirements/information relating to this product. Additional
transportation system information can be obtained through an authorized sales or customer service representative. It is the responsibility of
the transportation organization to follow all applicable laws, regulations and rules relating to the transportation of the material.
15. REGULATORY INFORMATION (Not meant to be all-inclusive—selected regulations represented)
FEDERAL/NATIONAL
OSHS Hazard Communication Standard
This product is not a “Hazardous Chemical” as defined by the OSHA Hazard Communication Standard, 29 CFR 1910.1200.
Superfund Amendments and Reauthorization Act of 1986 Title III (Emergency Planning and Community Right To Know Act) Section 313
To the best of our knowledge this product does not contain chemicals at levels which require reporting under this statute.
Superfund Amendments and Reauthorization Act of 1986 Title III (Emergency Planning and Community Right To Know Act) Section 302
To the best of our knowledge this product does not contain chemicals at levels which require reporting under this statute.
Superfund Amendments and Reauthorization Act of 1986 Title III (Emergency Planning and Community Right To Know Act) Section 311 & 312
Delayed (Chronic) Health Hazard: NO
Fire Hazard: NO
Immediate (Acute) Health Hazard: NO
Reactive Hazard: NO
Sudden Release of pressure Hazard: NO
Toxic Substance Control Act (TSCA)
All components of this product are on the TSCA Inventory or are exempt from TSCA Inventory requirements.
CEPA - Domestic Substances List (DSL)
All substances contained in this product are listed on the Canadian Domestic Substances List (DSL) or are not required to be listed.
European Inventory of Existing Commercial Chemical Substances (EINECS)
The components of this product are on the EINECS inventory or are exempt from EINECS inventory requirements.

Safety Concerns 2-8
STATE/LOCAL
Pennsylvania (Worker and Community Right To Know Act): Pennsylvania Hazardous Substances List and/or Pennsylvania
Environmental Hazardous Substance List:
The following product components are cited in the Pennsylvania Hazardous Substance List and/or the Pennsylvania Environmental
Substance List, and are present at levels which require reporting.
COMPONENT CAS# AMOUNT
Propylene glycol 57-55-6 96.0000 %
Pennsylvania (Worker and Community Right To Know Act): Pennsylvania Special Hazardous Substances List:
To the best of our knowledge this product does not contain chemicals at levels which require reporting under this statute.
California Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1986)
This product contains no listed substances known to the State of California to cause cancer, birth defects of other reproductive harm,
at levels which would require a warning under the statute.
California SCAQMD Rule 443.1 (South Coast Air Quality Management District Rule 443.1, Labeling of Material Containing Organic
Solvents).
VOC: Vapor pressure 0.66 mmHg @ 20°C
1002 g/l VOC
1030 g/l less water and less exempted solvents
This section provides selected regulatory information on this product including its components. This is not intended to include all
regulations. It is the responsibility of the user to know and comply with all applicable rules, regulations and laws relating to the product being
used.
16. OTHER INFORMATION
ADDITIONAL INFORMATION
Additional information on this and other Dow products may be obtained by visiting our web page at www.dow.com.
Additional information on this product may be obtained by calling Dow’s Customer Information Group at 1-800-258-2436 (U.S.) or
1-800-331-6451 (Canada)
HAZARD RATING SYSTEM
NFPA rating for this product are: H - 0F - 0 R - 0
The ratings are part of a specific hazard communication program and should be disregarded where individuals are not trained in the use
of this hazard rating system. You should be familiar with the hazard communication programs applicable to your workplace.
RECOMMENDED USES AND RESTRICTIONS
Intended as a heat transfer fluid for closed-loop systems.
Dow recommends that you use this product in a manner consistent with the listed use. If your intended use is not consistent with
Dow’s Stated use, please contact Dow’s Customer Information Group at 1-800-258-2436 (U.S.) or 1-800-331-6451 (Canada) for
more information.
REVISION
Version: 4.1
Revision: 05/09/2002
Most recent revision(s) are noted by the bold, double bars in the left-hand margin throughout this document.
LEGEND
Bacteria/NA Non Acclimated Bacteria
FFire
HHealth
IHG Industrial Hygiene Guidelines
N/A Not available
NFPA National Fire Protection Association
OOxidizer
RReactivity
TS Trade secret
VOL/VOL Volume/Volume
WWater reactive
W/W Weight/Weight
NOTICE: Dow urges each customer or recipient of this MSDS to study it carefully and consult appropriate expertise, as
necessary or appropriate, to become aware of and understand the data contained in this MSDS and any hazards associated with
the product. The information herein is provided in good faith and believed to be accurate as of the effective date shown above.
However, no warranty, express or implied, is given., Regulatory requirements are subject to change and may differ between
various locations. It is the buyer’s/user’s responsibility to ensure that its activities comply with all federal, state, provincial or
local laws. The information presented here pertains only to the product as shipped. Since conditions for use of the product
are not under the control of Dow, it is the buyer’s/user’s duty to determine the condition necessary for the safe use of this
product., Due to the proliferation of sources for information such as manufacturer-specific MSDSs, Dow is not and cannot be
responsible for MSDSs obtained from any source other than Dow. If you have obtained a Dow MSDS from a non-Dow source or
if you are not sure that a Dow MSDS is current, please contact Dow for the most current version.

Introduction 3-1
Introduction
DRYAIR Components
Water Heater Module
•A compact, portable and light weight design. Forklift pockets on all four sides allow for
easy positioning on the work site.
•Automatic water heater temperature control and fuel usage which responds to work site
demands.
•Low pressure atmospherically vented circulation system ... no special boiler certification
is required to operate the system.
•Circulation system “automatic air vent” component to quickly eliminate air from the
fluid circulation system for quick setup-and-go operation.
•A water heater module control center which monitors and controls system operations.
•A multi-light system operation feature for easy system troubleshooting.
Powered Heat Transfer
Portable heat exchanger
Portable heat exchangers are the ideal way to heat and/or dry enclosed structures. Their
compact and mobile design allows them to be positioned where required on the job site. The
efficient fan/coil design provides a high rate of heat transfer. High volume fans then deliver
this heat evenly throughout a large area. The clean, low relative humidity heat delivery
minimizes energy costs by eliminating the need to draw in fresh outside air. With the
DRYAIR system, you just reheat warm internal air, rather than heating cold external air.
Fluid circulation
Fluid circulation lines are designed to endure the toughest work site environment. Portable
distribution manifolds connected to the primary circulation system redistribute the heat
transfer fluid through secondary lines. Some fluid circulation components come with isolation
valves and all come with quick couplers... ensuring quick set up and start up, and quick
disassembly when the job is done.
1 - 2000-0250 series water heater module
2 - portable heat exchangers

Introduction 3-2
Passive Heat Transfer
Circulation line heat exchangers
The circulation line heat exchangers are the perfect solution for:
•Heating and/or thawing cold or frozen ground.
•Frost prevention.
•Concrete curing and heating in subzero environments.
The DRYAIR system can be applied to all types of concrete applications. Circulation line
heat exchangers can be secured directly against the surface of the concrete or concrete forms.
Alternately, an expendable circulation line can be incorporated into the concrete structure
during the pour. Thus the slab floor can continue being heated, to provide radiant floor heat
during construction.
Hose reel
The DRYAIR hose reel is capable of holding over 6000 ft. of 3/4" I.D. circulation line heat
exchangers. The reel can be transported by common carrier, or slings can be used for lifting.
The hose reel is forklift accessible from all four sides.
The reel is ideal for on-site applications:
•A "unique" auto-feed system eliminates the need for a second person at the reel when
laying out hose.
•The independent modular design lets you store the hose reel at a secure location on or off
the job site when not in use. The independent modular hose reel also allows deployment
of hose at more than one job site.
•The reel can be used to store or deploy other distribution lines used in DRYAIR portable
heating applications.
•The reel can also be secured onto its own transport trailer. The trailer's "no-clog" opening
directly under the hose reel prevents mud build up. A "no slip" working deck promotes
safe, convenient and dry hose reel operation.
Accessories
Trailers
Several different models are available depending on the required applications. Single or
tandem axle trailers are available depending on the size of water heater module and the
accessories requiring transportation.
Mixing/booster pump
The multifunctional mixing/booster ensures maximum flexibility in the use of the DRYAIR
system.
•Tempering mode supplies lower temperature fluid for concrete cure and radiant floor heat
applications eliminating the need to reduce the water heater operating temperatures below
safe operating ranges.
•When operating in booster mode, the system can increase flow rates or function as a
pumping station to increase pumping distances.
•The mixing/booster also allows for dual-temperature control. High temperature fluid can
be provided to portable heat exchangers, along with a lower temperature fluid for concrete
cure and radiant floor heat applications.
Insulated line jackets
Insulated circulation line jackets are also available. These insulated jackets will prevent
exposed circulation line heat loss in extreme subzero conditions.
5 - trailers
4 - hose reel
3 - distribution manifold & circulation
line heat exchangers

Introduction 3-3
How the DRYAIR System Works
The DRYAIR system uses a low-pressure,
open fluid loop distribution system with an
atmospherically vented fluid reservoir. A
hydronic water heater warms the heat transfer
fluid. This heated fluid is pumped through a
distribution system loop, passing through heat
exchangers in remote locations.
Two types of exchangers are available:
•Portable heat exchangers include a heat
transfer coil, fan and thermostatic
temperature control. The heat transfer
fluid flows through the transfer coil, where
heat is transferred to the air being drawn
through the coil by the fan. The coil is
specially designed for optimum heat
transfer, without adding any moisture or
combustion by-products to the air.
•Circulation line heat exchangers use
flexible hose with hydraulic-style quick-
couplers for ease in hookup. Heat transfer
occurs by direct contact heat transfer and
radiant heat conduction.
The mixing/booster unit can be utilized to:
•Provide lower temperature fluid for
concrete cure and radiant floor heat
applications.
•Provide dual temperature control with a
single fluid circulation system.
•Boost fluid flow and increase pumping distances.

Setup 4-1
Setup
The positioning of all the system components on the site will be
influenced by a number of factors. Please read all of the “Setup”
section before beginning. Be sure to observe all local electrical
codes, gas codes and fire regulations when setting up the DRYAIR
system.
Positioning and Handling of
WaterHeaterModule
•The water heater module can be moved with a forklift and is
accessible from four sides.
•Be careful when lifting, moving, or placing your Dryair system
for you can cause internal damage to your water heater.
•Be sure to observe all local gas and electrical codes and fire
regulations.
•The cabinet must be leveled and not set on any type of
combustible material.
•Make sure to consider down drafting which can be caused by
tall buildings, high winds or when the top of the chimney is
level with the eve. Allow a 3 foot minimum clearance for all
sides except the header connection side, which requires at least
6 feet.
•Do not install the water heater cabinet in a location that blocks
or can block, fully or partially, the combustion air intakes which
are located on front/back and supply/return side of system.
•Consider cabinet positioning in relation to portable heat
exchanger positioning.
RequiredSafetyClearances
The “water heater module” is a heating appliance, therefore safe
heat and exhaust clearances must be observed
•Maintain 24” of the clearance on all sides of the unit (1-1)
•Maintain 36” of clearance (2-1) on all sides of the flue pipe
and chimney cap
•Confirm that the air intakes (1-2) on all sides of the water
heater module, are free of any obstructions
Elevation Concerns
Elevated portable heat exchangers should be lower than the fill tank
fluid reservoir (2-2) in the water heater cabinet. If this is not
observed, the following can occur:
•Insufficient fluid in the system.
Fluid will drain back to the fill tank from the over-elevated portable heat exchangers when the pump is shut off. The fill tank will
show adequate fluid but, when the pump is started, extra fluid will be required to recharge the over-elevated portable heat exchangers
and the system will then have insufficient fluid in the reservoir.
•Fluid overflow.
If while the pump is running, fluid is added to maintain proper fluid levels, overflow at the fill tank will occur when
the pump is shut off. This would occur because of the drain back from the over-elevated portable heat exchangers.
1 - water heater module - top view
2 - water heater module - control side view

Setup 4-2
FuelSetup
Natural Gas
•The installation of natural gas lines to the DRYAIR water heater module must be performed by a licensed gas tradesperson, and must
conform to all local natural gas codes for water heater appliance installations.
•Be sure the gas service is adequate to feed the water heater cabinet you are installing.
•Supply Gas Pressure - Max. = 14” W.C.
Min = 7” W.C.
Manifold Gas Pressure-Max = 4” W.C.
Min = 3.5” W.C.
•Confirm this data by double-checking the “Water Heater Data Plate” (3-1) for the gas
requirements of your unit.
•Connect the gas line to the gas line connection on the DRYAIR water heater module.
•In areas where permitted by code, flexible connection hose could be used with multiple
access fittings on the gas main.
•Always check for gas leaks around fittings and connectors before proceeding to the
electrical connections.
Propane (LP) Gas
•The DRYAIR line of propane gas water heaters are equipped from the factory with
external mounted, step down propane gas regulator valves adequate to reduce inlet pressures (tank to module) from 10-12 P.S.I. down to
the water heater requirements of 11”WC. This is adequate for most regions. If your propane supply is not in the 10-12 P.S.I. range,
contact DRYAIR for assistance, or your gas supplier for a correctly sized regulator valve.
•Be sure the gas service is adequate to feed the water heater module you are installing.
•The minimum recommended tank size for proper operation of the system is a 200 lb
propane tank.
•To use the DRYAIR system without the recommended 200 lb tank size will result in
inadequate and inconsistent fuel delivery. DRYAIR will not be responsible for faulty
system operation if the recommended tank size is not used.
•Connect the propane supply line to the inlet of the gas regulator (4-1) located on the
water heater module. Open the fuel supply and check for leaks around fittings and
connectors before proceeding to the electrical connections.
Before operating the water heater:
•The regulator (4-1) on the water heater module must be vented in accordance with the
local authority having jurisdiction. A regulator vent line is supplied with the water
heater.
•The vent line (4-2) will extend the vent outlet point a minimum distance of 10 ft.
away from a combustion air inlet on the water heater cabinet.
•Ensure the vent line is installed on the propane regulator and extended.
Electrical Requirements & Connection
•Before making any electrical connections, be sure that the electric power supply and the
gas supply are off.
•The water heater module requires 115VAC power to operate the pump. The water heater
controls and ignition pilot are operated from a 115VAC supply. The module is factory
wired so the only connection to be made is a 115VAC main feed to the circuit breakers
inside the water heater cabinet.
•The main feed wiring must be adequately sized to carry the minimum ampacity shown on
the water heater modules rating label.
•All electrical connections, connectors and wire must be CSA/UL approved, and installed
according to local laws and codes.
•A 3-wire hook-up is required for the Model 2000-0250 water heater module to work
properly. Warranty is void if the wiring is not done correctly.
5 - electrical power supply hook-up
4 - vent regulator
4-1
4-2
3 -RAYPAK water heater data plate
3-1

Setup 4-3
Heat Transfer Fluid (HTF)
CAUTION! At no time should you use automobile antifreeze in your DRYAIR system. The use of automobile antifreeze will void
yourDRYAIR warranty.
•The heat transfer fluid (HTF) level should show no more than 1/4 on the gauge (cold fluid) at start-up. As the HTF warms to operating
temperature, fluid expansion will raise the level to 1/2 or 3/4 on the gauge (depending on the total volume of fluid in the circulation
system).
Heat transfer fluid specifications
•DRYAIR pre-mixed HTF fluid is made up of 50% “Dowfrost® HTF” or
“Boss Chill PG” and 50% water, by weight this provides freeze
protection down to -28°F (-33°C).
•The “glycol/water mixture chart”, to the right, will provide you with more
information on the proper mixture for your area.
•Soft water with a neutral pH=7 must be used.
•“Dowfrost® HTF” or “Boss Chill PG” propylene glycol must be used.
The pure “Dowfrost® HTF” or “Boss Chill PG” heat transfer fluid used
in the DRYAIR system is made up of a blend of 95-97% Propylene
glycol, <5% Dipotassium phosphate and deionized water (see Safety
Concerns section - MSDS sheets for additional information).
Primary Circulation Lines
•If possible, position the primary circulation lines out of high traffic areas.
•Connect the primary circulation lines to the “supply” (7-1) and “return” (7-2)
Quick Change couplers on the water heater. Isolation valves and quick change
couplers are attached to both ends of the primary circulation lines to enable quick
coupling. This also allows the isolation of the primary lines while retaining the
heat transfer fluid “HTF” in the lines. Plus... setup and dismantling of the
circulation system is much quicker.
By Mass By Volume °F °C
0.0 0.0 32.0 0.0
10.0 9.6 26.1 -3.2
20.0 19.4 17.9 -7.8
30.0 29.4 6.7 -14.0
40.0 39.6 -8.1 -22.3
50.0 49.9 -28.9 -33.8
60.0 60.0 -54.9 -48.3
Percent Propylyne Glycol Freezing Point
6 - glycol/water mixture chart
7 - primary circulation line connected to the water
heater module
7-27-1

Operation 5-1
Operation
2 - “return” isolation valve in the
“open” position
2-2
2-1
3 - automatic air vent
Before Firing the System
Before proceeding with the “Water Heater Initial Firing” procedures, confirm the following:
•Verify that the “Positioning and Handling of Water Heater
Module” procedures in the “Setup” section of the
operators manual have been completed properly.
•Verify that the “Fuel Setup” procedures in the “Setup”
section of the operators manual have been completed
properly.
•Verify that the “Electrical Requirements & Connection”
procedures in the “Setup” section of the operators manual
have been completed properly.
•Verify that the heat transfer fluid level gauge shows
between 1/4 and 1/2 full.
•Verify that the shipping plug (1-1) is removed from the
exterior elbow fitting that serves as the glycol reservoir
tank vent/overflow.
Electrical Check & Power-up
•Make sure the gas supply is closed off and control panel toggle switchws are in the “OFF” position.
•Supply power to the system.
Fluid Circulation System Start-up
The DRYAIR water heater cabinets, portable heat exchangers and circulation line are shipped pre-
filled with heat transfer fluid.
Purging Air from the
“HTF” Circulation
System
•Verify that the “supply” and “return” coupler connec-
tions (2-1) on the “water heater module” are connected to
the circulation manifold (2-2) or the primary circulation
lines.
•Complete the connection for one “heat exchanger loop” or
“portable heat exchanger” This will close the circulation
loop and allow circulation.
•Verify that the “supply” and “return” isolation valves
(2-1) and the isolation valves (if used) are in the “open”
position.
•The DRYAIR Model 2000-0250 system is equipped
with an in-line automatic air separator (3-1) to eliminate
air trapped in the fluid distribution system. No
adjustment to the air separator is required.
3-1
1-1
1 - reservoir overflow/vent outlet elbow

Operation 5-2
•Toggle the pump switch (4-1) to the “On” (up) position
and run the pump. This will release the air from the
system.
•Monitor the “heat transfer fluid level gauge” (5-1) and
make sure that the heat transfer fluid level stays between
1/4 to 3/4 full at all times during this process.
•Note that there may be a certain amount of air in the
system. “HTF” levels may change as air is displaced from
the system. Add “HTF” fluid to maintain 1/4 to 3/4 levels.
• When the air is eliminated, the “Pump Pressure” gauge
(6-1) will hold at a steady reading of between 25 to 35
P.S.I.
4-1
4 - pump switch, water heater
switch and breaker reset
5 - heat transfer fluid level gauge
5-1
6-1
6 - pump pressure gauge