CSA 3.8 2021 Certified Dryers
The following instructions pertain to dryers built and certified to the CSA 3.8 2021 standard and is meant for qualified personnel only.
The equipment shall be installed in accordance with the Natural Gas and Propane Installation Code, CSA B149.1 and the Propane Storage and Handling Code, CSA B149.2, or applicable provincial regulations, which should be carefully followed in all cases. Authorities having jurisdiction should be consulted before installations are made.
LP installations shall conform to the following:
The LP supplier must install the appropriate supply line in Type K copper underground from the supply tank to the edge of the concrete pad as per B149.1,2. This is solely the responsibility of the fuel supplier under the Z code.
If an underground installation is not preferred, a continuous run of black iron and copper can be installed above the concrete.
A continuous piece of type K copper can be used through or under the concrete provided that it is protected by sleeves or in a channel. A coil at the final connection can be used as an expansion provided it is not kinked.
A typical installation on LPG starts with the Type K copper ending at the pad followed by a swing joint attached to lengths of SK80 piping fittings with resign coated hanger brackets attached to the concrete to avoid galvanic reaction. The final connection shall have a swing joint or category 1 expansion hose no longer than 3 feet in length followed by a SK 80 union to facilitate removal and final attachment to ball valve supplied by manufacturer.
Pertinent code clauses pertaining to basic installation:
B149.1 6.16.3 piping and tubing shall be mounted and braced to provide for vibration, contraction or jarring.
B149.1 6.14.1 a defective section of piping or tubing shall be replaced
B149.1 6.14.5 piping shall not be field bent
B149.1 6.9.6 joint sealant shall conform to Can/ulc 642 and shall be applied to male threads of the pipe
B149.1 6.8.1 piping ends shall be free of cuttings and burs
B149.1 6.8.2 piping shall be reamed
B149.1 6.14.2 bushings shall not be nested
B149.1 6.11.9 provide effective swing joints at manifolds to accommodate for expansion and contraction and ground level and at appliance level
B149.1 6.20.5 metallic gas hose can be used in commercial or industrial environments where vibrations, expansions or contractions are present
B149.1 6.20.3 gas hose for a PERMANENT installation shall not exceed 10 feet in length a permanent installation consists of an appliance hard wired to the electrical source a generator or PTO is considered temporary and can be moved
B149.1 6.16.1 piping exposed to atmospheres shall be painted or coated
B149.1 6.17.1 standard practice paint Liquid propane piping RED. B149.1 union should be installed to facilitate removal of piping if required
B149.1 6.2.2 a fitting used shall with steel shall be malleable iron or steel
B149.1 hydrostatic relief devices shall be used where liquid propane can be trapped and vented to a safe location
B149.1 6.4.3 schedule 80 piping and fittings shall be used on liquid phase systems or over 125 psi
B149.1 6.16.6 when piping or tubing is run in a sleeve the sleeve shall be of a type of material that will avoid galvanic reaction and protect the tubing
B149.1 6.15.10 when tubing is laid under pavement and re-enters above ground a sleeve shall be used to protect the tubing through the concrete
B149.1 6.2.15 plastic pipe shall not be used in a liquid piping system
B149.1 6.4.17 close nipples, street elbow or street T shall not be used
B149.1 6.2.5 flare nuts shall not be externally forged or machined and shall be of the forged type
B149.1 6.2.4 copper shall be of the type K,G or L
B149.1 6.9.9 a joint in seamless copper shall be of a flared type
NG installations shall conform to the following:
Typically a gas meter is installed 15 feet away from the grain dryer. A pipe can be extended with a union to the pavement level with a swing joint before attaching to the pavement as the meter can move independently from the concrete pad. This can then be followed by a length of pipe to an additional swing joint, or type 2 gas hose, acting as a swing joint attached to the final connection with a union. There shall be a shut off valve after the union.
Pertinent code clauses pertaining to basic installation:
B149.1 6.4.17 close nipples, street elbow or street T shall not be used
B149.1 union should be installed to facilitate removal of piping if required.
B149.1 6.2.2 a fitting used shall with steel shall be malleable iron or steel
B149.1 6.20.3 gas hose for a PERMANENT installation shall not exceed 10 feet in length a permanent installation consists of an appliance hard wired to the electrical source a generator or PTO is considered temporary and can be moved.
B149.1 6.16.1 piping exposed to atmospheres shall be painted or coated yellow
B149.1 6.16.3 piping and tubing shall be mounted and braced to provide for vibration, contraction or jarring.
B149.1 6.14.1 a defective section of piping or tubing shall be replaced
B149.1 6.14.5 piping shall not be field bent
B149.1 6.9.6 joint sealant shall conform to Can/ulc 642 and shall be applied to male threads of the pipe
B149.1 6.8.1 piping ends shall be free of cuttings and burs
B149.1 6.8.2 piping shall be reamed
B149.1 6.14.2 Bushings shall not be nested
B149.1 6.11.9 provide effective swing joints at manifolds to accommodate for expansion and contraction and ground level and at appliance level
B149.1 6.20.5 metallic gas hose can be used in commercial or industrial environments where vibrations, expansions or contractions are present.
B149.1 6.20.3 gas hose for a PERMANENT installation shall not exceed 10 feet in length a permanent installation consists of an appliance hard wired to the electrical source a generator or PTO is considered temporary and can be moved.
B149.1 6.4.3 schedule 40 piping and fittings shall be used on systems or under 125 psi
Dryer wiring from the branch circuit is included in the field installation wiring schematic. All wiring is to be in accordance with the Canadian Electrical Code, Part1, CSA C22.1.
This dryer is not service rated, and will require an additional overload protection device in front of the dryer for adequate protection. All wiring is to be in accordance with the Canadian Electrical Code, Part1, CSA C22.1.
The electrical installation should follow domestic NEC standards.
Minimum wire size is 18awg unless specified.
All wire gauges shown on the drawing are recommended only! Electrical contractor should follow the local codes and authority having jurisdiction.
All wire sizing based on copper conductors, but aluminum may be used if sized correctly.
This dryer is not service rated. Proper service protection is recommended.
The dryer and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psi (3.5 kPa). The dryer must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psi (3.5 kPa).
Pressures Refer to the dryer rating plate for determining the minimum gas supply pressure for obtaining the maximum gas capacity for which this dryer is specified.
Gas leak tests need to be performed during dryer start-up to verify the gas-tightness of the dryer's components and piping under normal operating conditions. During the tests, observations should be made at the gauges attached to the unit. If the gauges are reading 0, there could be a leak as the system is normally under pressure. A soapy water solution can be used to check fittings for leaks while the unit is in operation by a 60/40 mixture of soap and water with a brush. Gauges can be installed before and after the safety shutoff valves. The unit can be bumped and shut off. If the gauges return to 0, a leak could be present.
Safety shut off valves need to be tested for tightness annually. To test, inlet connections should be soap tested up to the safety shut-off valves or solenoid. From there, install gauges in between the safety shut-off valves or solenoids. Fire up the dryer with the firing valve closed. The firing valve is the valve located just before the burner. The safety shut-off valves will open, pressurizing the system and allowing the gauges to read pressure. The dryer will fail on ignition and the gauges should remain pressurized. If the gauges drop in pressure with the firing valve closed, that would indicate a potential leak. If the gauges return to 0 soap testing should commence on all fittings.
The gas piping installer must install a manual emergency shutoff valve in an appropriate location that allows access to this valve to shut off the fuel to the dryer in case of a fire or explosion at the dryer. This installation must conform to the following:
B149.1 6.18.2 a readily accessible manual shutoff valve must be installed as per below. Either one is acceptable.
In the drop or rise, as close as possible to the valve train of a commercial or industrial valve train.
In the horizontal piping of the drop or riser and the appliance valve train within 2 feet of the appliance.
If the information in the operations manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
Do not try to light any appliance
Extinguish any open flames
Do not touch any electrical switch
Immediately call your gas supplier. Follow the gas supplier’s instructions
If you cannot reach your gas supplier, call the fire department.
Installation and service must be performed by a qualified installer, service agency or the gas supplier
Improper installations, adjustment, alteration, service or maintenance can cause property damage, injury of death. Read the installation, operating, and maintenance instructions thoroughly before installing or servicing this equipment.
The use and storage of gasoline and other flammable vapors and liquids in open containers in the vicinity of this appliance is hazardous. Refer to codes and standards CSA 3.8, 4.29.7.
The following specifications need to be followed in regards to venting:
B149.1 5.4.1 hydrostats must be vented to a “safe location”
B149.1 5.4.2 hydrostats may be vented into a common header provided the cross sectional area is equal to the cross sectional area of the multiple vents IE: 2 /12 “ hydrostats must vent into a 1” line
B149.1 5.5.6 vents must be designed not to allow water, insects or debris simply put use a drip and a 90 at the end of the pipe with a screen
B149.1 5.5.9 vents shall terminate 10 feet from mechanical air intake
B149.1 5.5.8 vents shall not be capped off or made in-operable
B149.1 5.5.4 vents shall not be reduced in size as to impede on the performance.