Field Controls SWG Stainless Series User Manual

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INSTALLATION OF SWG POWER VENTER
UNIT SIZING CHART
OIL GAS MAXIMUM EQUIVALENT FEET OF VENT PIPE
MAX*
OIL GPH
INPUT
MAX**
BTU/HR
INPUT
AT MAX BTU/HR
INPUT
AT 60% OF MAX BTU/HR
INPUT
VENTING WITH
VENT PIPE SIZE
MODEL
N/A 70,000
21 80 3"
SWG–350 100 4"
--- --- ---
1.10 170,000
--- 23 3"
SWG–4HD
SWG–4s
35 100 4"
65 100 5"
1.85 290,000
16 44 4"
SWG–5
SWG–5s
51 100 5"
95 100 6"
2.65 416,000
28 78 5"
SWG–6
SWG–6s
68 100 6"
100 100 7"
3.60 566,000
28 78 6"
SWG–761 100 7"
90 100 8"
4.75 740,000
26 72 7"
SWG–851 100 8"
70 100 9"
8. Air  ow adjustment MUST be made to ensure appliance e ciency. This should be done at the appliance
exhaust outlet with a velocity meter, draft gauge, or by "match test procedure". A match test is in accordance
with National Fuel Gas Code ANSI Z223.1, Section 8.6.
9. On oil- red and gas- red heating appliances not equipped with a draft hood, a barometric draft control MUST
be installed to regulate proper air  ow and  uctuations in the system’s air  ow during operation. Fluctuations
may come from wind loads on the outlet of the power venter, house de-pressurization during windy days,
and the di erent house ventilation requirements between summer and winter operation. For gas appliances,
use a Field Controls Type MG-1 Barometric Draft Control. For oil appliances, use a Field Controls Type M or RC
Barometric Draft Control. Gas- red draft induced systems should have a single-acting barometric draft control
installed.
Table 1
*Rating at 100 psi. Sizing based on appliance maximum input rate not actual  ring rate.
**Do not exceed maximum BTU/HR input rating or maximum oil GPH input. For multiple venting system applications, add the input for
each appliance. Category I gas- red draft induced systems require an SWG-4HD or larger. Category III gas- red draft induced systems
require an SWG-5 or larger.
PROCEDURE FOR CALCULATING TOTAL EQUIVALENT PIPE LENGTH IN FEET
1. Calculate the total equivalent feet for each type of  tting used in the venting system from Table 2.
2. Calculate the total amount of feet for the straight lengths of vent pipe.
3. Add the equivalent feet for the  tting with the total amount of feet of straight lengths. This will
approximate the total equivalent feet of the vent system.
P/N 46139100 Rev P 08/19

Field Controls SWG Stainless Series Specifications

General

Brand	Field Controls
Model	SWG Stainless Series
Category	Fan
Language	English