FIELD CONTROLS, LLC - CONTRACTOR PRODUCTS SWG and POWER VENTING SYSTEMS

SWG/CV Power Venter

(Outdoor Mounted Power Venters for Oil & Gas)


Note: ComboVent and SWG-4HD, 5 & 6 Motor Kits include a stainless steel blower wheel for better performance and extended life.

Gas and oil heating appliances generate heat through the combustion of fuel. The heat is transferred through the heat exchanger and distributed to the conditioned space. The products of combustion, however, must be vented safely out of the structure. In a conventional chimney, venting is achieved by the natural lifting action of the hot combustion gas. New, efficient systems absorb more of the heat in the heat exchanger and produce lower temperature vent gas. Lower temperature gas does not rise as quickly or as reliably as in older, less efficient systems. Power venting or sidewall venting is more economical and safer than chimney venting. A power venter uses a motorized blower to vent the products of combustion. A power venter is interlocked with the appliance to ensure that proper draft is achieved before the appliance burner is activated.

The SWG or ComboVent™ Power Venter is the safest, most efficient power venter available today.

Patented SWG or ComboVent Power Venters are ETL and cETL listed for all LP gas, natural gas, or oil-fired heating equipment. The SWG or ComboVent combines the motor, blower, and vent hood in one complete, easy to install unit. The SWG mounts on the outside of the building and pulls the combustion gases from the appliance through the outside wall utilizing 100% negative pressure.
Benefits of the SWG or ComboVent Power Venter include:
• 100% negative pressure in the vent pipe for maximum safety.
• Standard galvanized pipe can be used instead of expensive stainless steel.
• No need to seal vent pipe joints, saving time and money.
• Significantly longer vent lengths than positive pressure, direct vent systems.
• The SWG or ComboVent is recommended by major heating appliance manufacturers.
The SWG or ComboVent must be sized to match the appliance or appliances' input firing rate. Most firing rates are published in the manufacturer’s installation manual. The SWG and ComboVent must be installed with a CK Control Kit to ensure proper listing and safe, efficient venting.

When to use the SWG/CV Power Venter:

• Use with gas or oil furnaces, boilers, and water heaters.
• New construction.
• When converting from electric to gas or oil.
• To avoid relining a chimney.
• When installing an additional heating appliance.
• When co-venting with water heater or additional appliance, can be used as a gas/oil combo single unit.

How the SWG/CV Works

1. The thermostat calls for heat, energizing the Power Venter (A).
2. A negative pressure is created, closing the pressure switch on the control kit (B).
3. The burner (C) is activated and combustion gases are exhausted (D).
4. After the thermostat is satisfied, the burner shuts down and the venter continues to post purge, exhausting residual flue gases.
5. When the timer or temperature control is satisfied, the venter is deactivated.

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SWG Power Venter

(Sizing The Venter)

Size the SWG or ComboVent venter based on the input firing rate of the appliance. If the power venter is being used to vent multiple appliances, add the input firing rates for each appliance and use that total to size the venter. Knowing the total input BTU/hr. for gas, or GPH for oil, the venter can be sized from Table 1. Select the venter rated closest to the total input BTU or GPH for installation. If the input of the appliance is higher than the maximum allowable for that size SWG or CV, move to the next larger size SWG or CV.

Do not select a venter with a maximum BTU/hr. or GPH lower than the appliance. The equivalent feet of vent pipe for the installation must be calculated. Based on the vent pipe diameter to be used, compare the calculated equivalent feet of vent pipe with the maximum equivalent feet allowable for the venter (See Table 1). If the calculated equivalent feet is greater than that allowed for the venter, increase the diameter of the vent pipe to be used and refer to the table or use the next larger size SWG or CV venter.

Note: In Table 1, the maximum equivalent footage allowable for the vent pipe is given for two points, the maximum BTU/hr. venting capacity and at 60% of the maximum. This allows for estimating values between the two given points.

Sizing The Venter Table 1 - Sizing The Venter (Use Maximum BTU or GPH Input)
MODEL	MAX* OIL GPH INPUT 100psi	MAX* OIL GPH INPUT 140psi	MAX** GAS BTU/hr. INPUT	Maximum Equivalent Feet of Vent Pipe		VENT PIPE SIZE
MODEL	MAX* OIL GPH INPUT 100psi	MAX* OIL GPH INPUT 140psi	MAX** GAS BTU/hr. INPUT	AT MAX BTU/hr. INPUT	AT 60% OF MAX BTU/hr. INPUT	VENT PIPE SIZE
SWG-3	N/A	N/A	70,000	21	80	3"
				50	100	4"
SWG-4HD, 4HDs, CV-4	1.10	.90	170,000	35	100	4"
				65	100	5"
				100	100	6"
				100	100	7"
SWG-5, 5s, CV-5	1.85	1.55	290,000	16	44	4"
				51	100	5"
				95	100	6"
				100	100	7"
SWG-6, 6s	2.65	2.25	416,000	28	78	5"
				68	100	6"
				100	100	7"
SWG-8	4.75	4.0	740,000	26	72	7"
				51	100	8"
				70	100	9"
SWG-10	9	7.5	1,300,000	10	100	8"
				30	100	10"
				75	100	12"
SWG-12	13.5	11.5	1,900,000	16	100	10"
				40	100	12"
				86	100	14"
SWG-14	21	17.75	3,000,000	8	85	12"
				18	100	14"
				35	100	16"
NOTE: Control Kits are required for operation of the SWG. Stainless steel recommended for oil applications.

Table 2 - Specifications - “s” Designates stainless steel model.

Model

Volts

Amps

Watts

RPM

Thermal Protection

SWG-3

115

0.6

3000

YES

9 1/16"

8 1/2"

7 5/8"

9 3/16"

SWG-4HD

115

1.7

138

3000

YES

11 3/4"

9 1/2"

SWG-4HDs

115

1.7

138

3000

YES

11 3/4"

9 1/2"

11"

11 1/2"

SWG-5

115

1.3

144

3100

YES

11 3/4"

10 3/4"

12"

12 1/4"

SWG-5s

115

1.3

144

3100

YES

11 3/4"

10 1/2"

12"

12 1/2"

SWG-6

115

2.1

228

3100

YES

11 3/4"

10 3/4"

12"

12 1/4"

SWG-6s

115

2.1

228

3100

YES

11 3/4"

10 1/2"

12"

12 1/2"

SWG-8

115

4.37

478

3100

YES

10"

11 3/4"

11 7/8"

13"

14 1/4"

SWG-10

115/230

11.4/5.7

1311

1725

YES

10"

14"

19 1/2"

24"

20"

21"

SWG-12

115/230

13.6/6.8

1564

1725

YES

12"

16"

19 1/2"

25"

22"

23"

SWG-14

115/230

14.0/7.0

1610

1725

YES

14"

18"

19 1/2"

26"

24"

25"

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SWG Power Venter

(Planning the Vent System)

Location of the termination of the venting system should comply with the National Fuel Gas Code, ANSI Z223.1, manufacturer’s recommendations, and/or applicable local codes. See diagram for typical terminal locations.

A.The exit termination of a mechanical draft system must not be less than 7’ above grade when located adjacent to a public walkway.*
B.The venting systems, with the exception of direct vent appliances, must terminate at least 4’ below, 4’ horizontally, or 1’ above any door, window or gravity air inlet into the building.
C.A venting system must terminate at least 3’ above any forced air inlet located within 10’.
D.The bottom of the vent terminal must be located at least 1’ above finished grade.**
E.The vent termination should not be mounted directly above or within 3’ horizontally from an oil tank vent or gas meter (not shown in diagram).
F.The vent termination point must not be installed closer than 3’ from an inside corner of an L-shaped structure.
G.For basement installations where a window well must be used or in installations where the vent terminal cannot be mounted to maintain the minimum 12” clearance above grade, use a Field Vent Riser™. The Vent Riser ensures the vent termination is above grade or the snow line and is in compliance with local codes (not shown in diagram).

*10" or larger should be 10' minimum above public walkway. **10" or larger should be 4' above finished grade.

Calculating Equivalent Feet of a Vent System

1.Determine the total equivalent feet for each type of fitting used in the venting system from Tables 2 and 3.
2.Calculate the total feet for the straight lengths of pipe.
3.Add the equivalent feet of the fittings to the total amount of feet of straight length pipe. This will approximate the total equivalent feet of the vent system.
4.Find your total equivalent feet in Table 1 to determine the proper model for your installation.

Example: System Pipe Size = 4"
Step 1 2-90° Elbows (4") = 14 Ft.
Step 2 10-2 Ft. Lengths of 4" Pipe = 20 Ft.
Step 3 Total Equivalent Feet = 14 Ft. + 20 Ft. = 34 Ft.

Table 2-Equivalent Feet for Vent Pipe Fitting
Vent Pipe Fittings	Vent Pipe Diameter
	3"	4"	5"	6"	7"	8"	9"	10"	12"	14"
Tee	19	25	31	38	44	50	56	63	75	89
Y-Connection	10	13	16	20	23	26	29	32	39	45
90° Elbow	5	7	9	11	12	14	16	18	21	25
45° Elbow	3	4	4	5	6	7	8	9	10	13

Table 3-Equivalent Feet for a Reducer/Increaser
Large Pipe Size	Small Pipe Size
	3"	4"	5"	6"	7"	8"	9"	10"	12"	14"
3"	0
4"	2	0
5"	4	2	0
6"	5	4	2	0
7"	6	5	4	1	0
8"	7	7	6	3	2	0
9"	7	8	7	5	4	2	0
10"	8	8	8	6	6	4	2	0
12"	8	10	10	8	9	8	6	4	0
14"	9	10	12	10	12	11	9	8	3	0
16"	9	11	12	11	14	13	13	11	8	3
18"	9	11	13	12	15	15	15	14	11	7
20"	9	12	14	13	16	17	17	17	15	11
To calculate the footage, add the lengths of all the straight lengths of vent pipe to the equivalent feet of all the vent pipe fittings, such as tees, elbows, and reducers.

SWG Super Lube

• Oil motor and fan shaft with SWG Super Lube annually
• Works in conditions of -40° to 300° (F)
• Synthetic lubricant which maintains specified viscosity
• Use of any other lubricant may cause premature failure

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SWG Power Venter

(Clearance to Combustibles)

Table 4
Pipe Size	Nominal Cross-Sectional Area Sq. Inches
3"	7
4"	13
5"	20
6"	28
7"	38
8"	50
9"	64
10"	79
12"	113
14"	154

If mounting the venting system near combustible materials, refer to Diagram A for allowable installation clearances. Clearances are based on an installation using single wall galvanized steel vent pipe. If manufactured double wall vent pipe is required or used for the installation, clearance should be based on the vent pipe’s rated clearance. Always check local code requirements for code restrictions.

Routing of the vent system and clearances for the vent pipe may be planned once the termination location is determined. Route the vent pipe from the appliance to the venter using as few elbows as possible. The horizontal section of the vent pipe should have a slight upward slope from the appliance to the venter. The vent pipe size (diameter) can be smaller than a typical chimney vented system and still overcome the higher pressure losses because the power venter mechanically creates the required draft or air flow to vent the system.

For estimating the minimum vent pipe diameter for a gas system, divide the BTU/hr. input of the heating equipment by 12,600 BTU/sq. in. For oil systems, multiply GPH by 140,000 BTU/GAL, then divide by 12,600 BTU/sq. in. This will give the minimum cross sectional area required. (See Table 4 for area to diameter conversion.) For multiple equipment venting systems, divide the total BTU/hr. input for all appliances by 9,300 BTU/sq. in. This will give you the minimum vent pipe diameter needed for the common breach of the vent system.

As a rule of thumb, size the vent pipe to the outlet diameter of the heating equipment for a single appliance venting system. For multiple appliance venting systems, use the outlet diameter of the largest unit and add 50%.

Diagram A

Single Pipe System
Allowable Inlet Temperature	Clearance (B)
400ºF or Less	3" min.
550ºF or Less	4" min.
550ºF or Less	3" min.*

Double Pipe System
Allowable Inlet Temperature	Clearance (A)
400ºF or Less	.5" min.
550ºF or Less	1" min.
550ºF or Less	.5" min.*

Extension Kits

Power Venter Model	Extension Kit Model
SWG-4HD	PEK-4
SWG-4HDS	PEK-4
SWG-5	PEK-5
SWG-5S	PEK-5
SWG-6	PEK-6
SWG-6S	PEK-6
SWG-8	PEK-8

The standard SWG Power Venter is designed for walls up to 8" thick. PEK extension kits allow the SWG to be installed in walls up to 16" thick.* The PEK kit includes the inner/outer pipe extension, air flow damper, and one foot of 1/4" aluminum tubing. It is available for models SWG-4HD through SWG-8.
SWG Ext Kit

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SWG Vent Kits

(Complete Venting Packages)

Gas Furnace Vent Kit

Model	Application
SWG-4G	24V Gas Furnaces


SWG Power Venter	4" MG-1 Draft Control	CK-43F Control Kit

The SWG-4G can be used with all 80+ gas draft induced furnaces, including those manufactured by the following companies: Amana, Armstrong, Bard, Carrier, Consolidated, Dunkirk, ICP, Lennox, Rheem, Trane and York.

Gas Water Heater Vent Kits

Model	Application
SWG-3WH	30mV Gas Water Heater up to 70,000 BTU
SWG-4WH	30mV Gas Water Heater up to 170,000 BTU


SWG Power Venter		CK-20FV/FG Control Kit

Oil Fired System Stainless Vent Kits

Model	Application
SWG-4OS	120V Oil-Fired Appliance up to 1.10 gph
SWG-5OS	120V Oil-Fired Appliance up to 1.85 gph
SWG-6OS	120V Oil-Fired Appliance up to 2.65 gph


SWG Power Venter		CK-63 Control Kit

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Control Kits

(Required to Operate
SWG/CV Power Venters)

Control Kits (CK) control the operation of SWG/CV Power Venters. See the chart below to select the proper kit for your application. Control Kits can also control the operation of Field Draft Inducers.

Applications
Model		Draft Proving Switch	Gas Pressure Switch	Secondary Safety Switch	Thermal Post Purge	Adjustable Electronic Post Purge	Fixed Post Purge	Draft Control	RJR-6
Oil
CK-61	All oil-fired systems. Has adjustable electronic post purge.	•		•		•			•
CK-62	All oil-fired systems. Has thermally activated post purge.	•		•	•				•
CK-63	All oil-fired systems. (May require optional delay oil valve for simultaneous burner operation.)	•		•		•
Gas - 30 mv
CK-20FV CK-20FG	30 millivolt gas-fired water heaters and gas-fired pool or spa heaters with a manual or internally mounted thermostat.		•	•			•
CK-21	Gas-fired instantaneous water heaters with pressure tap port in the burner manifold.		•	•
Gas - 24 v
CK-41F CK-41P**	Furnaces, boilers, unit heaters and water heaters operating with a 24 VAC gas valve without factory mounted spillage switches.	•		•			•
CK-43	Draft induced 24 VAC gas valve systems. Includes a 4" MG-1 draft control and post purge.	•				•		•
Gas - 750 mv
CK-81***	750 millivolt operated boilers, furnaces, water heaters, pool or spa heaters and gas-fired fireplaces when operated with a remote mounted thermostat or on/off switch. Operated off a 24 VAC circuit.	•					•
Gas - Co-venting Multiple Appliances
CK-91FV CK-91FG	Gas-fired draft induced 24 VAC gas valve systems and a 30 millivolt operated water heater. Includes a 4" MG-1 draft control and post purge.	•	•	•			•	•
CK-92FV CK-92FG CK-92FVP CK-92FGP	Gas-fired furnace or boiler and a 30 millivolt operated water heater. Includes post purge.	•	•	•			•

* Control Kits are ETL approved accessories when used in conjunction with the SWG Power Venter. ** Plugs into 24v electric damper *** A secondary safety switch should be used with a CK-81 F = Fixed Post Purge FV= right hand threaded TCA Safety Switch FG= left hand threaded TCA Safety Switch

Control Kit Installation


CK-41	CK-63

CK-41F mounted at venter. For use with a 24 VAC, gas-fired system (shown with cover off).

CK-63 remote mounted. For use with 120 VAC oil-fired systems. Electronic post purge is included (shown with cover off).

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