Specification
36 Customer Service: 252.522.3031
Draft
Draft Inducers
Sizing Chart
Gas-Firing with
Draft Hood
Gas-Firing with
Barometric Draft Control
Oil or Coal-Firing with
Barometric Draft Control
Input
(BTU/HR)
Pipe
Dia.
(IN)
Draft
Inducer
(Model)
Static
Pressure
(IN W.C.)
Flow
(CFM)
Input
(BTU/HR)
Pipe
Dia.
(IN)
Draft
Inducer
(Model)
Static
Pressure
(IN W.C.)
Flow
(CFM)
Max. Input
per GPH
Pipe
Dia.
(IN)
Draft
Inducer
(Model)
Static
Pressure
(IN W.C.)
Flow
(CFM)
69,000
105,000
111,000
120,000
3
4
5
6
DI-1
.04
.04
.06
.05
47
72
75
82
69,000
105,000
118,000
123,000
3
4
5
6
DI-1
.05
.05
.06
.05
36
55
65
68
.5
.7
.9
.95
3
4
5
6
DI-1
.05
.05
.05
.04
36
48
67
68
279,000
308,000
330,000
353,000
5
6
7
8
DI-2
.06
.07
.11
.07
190
210
225
240
300,000
340,000
364,000
390,000
5
6
7
8
DI-2
.07
.08
.09
.06
156
176
189
200
2
2.5
2.75
3
5
6
7
8
DI-2
.06
.07
.08
.05
156
175
200
215
522,000
674,000
694,000
835,000
8
9
10
12
DI-3
.18
.15
.12
.08
355
458
472
568
683,000
880,000
908,000
1,092,000
8
9
10
12
DI-3
.15
.13
.10
.06
355
458
472
568
5
6
6.5
7.5
8
9
10
12
DI-3
.13
.11
.09
.06
355
458
472
568
900,000
1,250,000
1,400,000
1,800,000
10
12
14
16
DI-4
.18
.20
.19
.15
612
850
952
1,224
1,177,000
1,635,000
1,831,000
2,300,000
10
12
14
16
DI-4
.15
.17
.16
.13
612
850
952
1,224
8.5
11
13
17
10
12
14
16
DI-4
.13
.14
.13
.10
612
850
952
1,224
2,000,000
2,200,000
2,400,000
2,800,000
14
16
18
20
DI-5
.14
.18
.10
.09
1,224
1,500
1,632
1,900
2,350,000
2,885,000
3,140,000
3,654,000
14
16
18
20
DI-5
.12
.15
.09
.08
1,224
1,500
1,632
1,900
17
21
22
26
14
16
18
20
DI-5
.10
.13
.07
.06
1,224
1,500
1,632
1,900
** 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
Control Kits (CK) control the operation of Field Draft Inducers.
See the chart below to select the proper kit for your application.
Draft Proving Switch
Gas Pressure Switch
Secondary Safety
Switch
Thermal Post Purge
Adjustable Electronic
Post Purge
Fixed Post Purge
Draft Control
RJR-6
Model Applications
Oil
CK-61
All oil-fired systems. Has adjustable electronic post purge.
3 3 3 3
CK-62
All oil-fired systems. Has thermally activated post purge.
3 3 3 3
CK-63
All oil-fired systems. (May require optional delay oil valve for simultaneous
burner operation.)
3 3 3
Gas
30 mv
CK-20FV
30 millivolt gas-fired water heaters and gas-fired pool or spa heaters with
a manual or internally mounted thermostat.
3 3 3
CK-21
Gas-fired instantaneous water heaters with pressure tap port in the burner
manifold.
3 3
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.
3 3 3
CK-43
Draft induced 24 VAC gas valve systems. Includes a 4" MG-1 draft control
and post purge.
3 3 3
CK-43F
3 3 3
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.
3 3
CK-21
750 millivolt operated gas-fired appliances with pressure tap port in the
burner manifold.
3 3
Co-venting Multiple
Appliances
CK-91FV
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.
3 3 3 3 3
CK-92FV
CK-92FVP**
Gas-fired furnace or boiler and a 30 millivolt operated water heater.
Includes post purge.
3 3 3 3