Quality engineered and
manufactured to maintain a
consistent draft on a wide
range of oil and gas fired
heating equipment. May be
used with chimney vented or
power vented heating equip-
ment. For fan assisted gas, oil
or solid fuel applications with
vent diameters from 4"–10",
choose the DC4 thru DC10.
For LP and natural gas appli-
cations with vent diameters from 4"–10", choose the DC4G
thru DC10G.
Used with any UC1 con-
trolled Inducer to inter-
lock additional 24/115
VAC heaters. Powered by
and communicates with
the UC1 through a factory
wired whip. For one
additional 24/115 VAC
heater add the MAC1E.
To interlock up to four
more additional 24/115
VAC heaters, add the
MAC4E. MAC4Es can be
daisy chained together for greater than 5 heaters. Important:
Total combined BTU/hr. input of all heaters and total equivalent
pipe lengths must be within Inducer’s capacity.
For use with UC1 Universal
Control, MAC1E or MAC4E
auxiliary controls. The WHKE
gas pressure switch actuates
the Inducer through the A - B
dry contacts. The Linear Limit
switch disables the heater in
the event of a venting
malfunction. Includes JA1
thermocouple junction
adapter. To interlock millivolt
water heater(s) only with a
UC1 controlled Inducer add a
WHKE for each millivolt heater. To interlock a millivolt water
heater and one 24/115 VAC furnace or boiler with a UC1
controlled Inducer, add a WHKE and a MAC1E.
Solid state control interlocks
with virtually any burner control
circuit. Features include:
adjustable pre and post purge,
LED status/diagnostic indicators,
prover switch delay to avoid
burner start up and wind
induced short cycling. Interlocks
with any 24/115 VAC burner
control circuit and also includes
“dry” contact actuation option.
Selectable voltage eliminates
false activation by burner control
check circuits.
Universal Control
Model UC1
Millivolt Safety Interlock Kit
Model WHKE
Barometric Draft Controls
Models DC4, DC5, DC6, DC7, DC8, DC9, DC10
DC4G, DC6G, DC7G, DC8G, DC9G, DC10G
Multiple Appliance Controls
Models MAC1E, MAC4E
www.tjernlund.com • 800.255.4208
For additional information request brochure #8500004
For additional information request brochure #8500490
Accessories
The UC1 is a standardized control for Tjernlund Inducers/Venters.
It offers many installation, operational and safety benefits.
Model Dimensions
Model
DJ-3
D-3
I
IL
XL
HD
H
7 1/2
9 1/8
14 1/2
17
18 7/8
27 1/2
W
8 1/2
9 1/2
13 1/2
14 3/4
18 1/2
16 3/4
D
5 7/8
7
8 3/4
10
10 1/2
25
X
2 5/8
3 1/8
4
4 1/8
5 1/8
6
Unit
Dimensions (In.)
Slot
Y
7 5/8
8 5/8
12 3/4
15
16 3/4
24 1/2
Ship
Weight
8 Lbs
10 Lbs
31 Lbs
34 Lbs
53 Lbs
176 Lbs
“H” — Overall Height
“D” — Overall Depth
“W”— Overall Width
“X” — Pipe Slot Width
“Y” — Pipe Slot Height