VENTING PROBLEMS CAUSED BY
Horizontal Vent Connectors
Tjernlund In-Line Draft Inducers assure
positive draft when restricted boilers and furnaces, poor chimneys or negative
pressures in buildings prevent proper exhaust of combustion gases.
The venturi action starts air moving up the stack instantly & keeps
it moving smoothly. These units are quick and easy to install and
completely automatic in operation. In-Line Draft Inducers are built
for long-lasting, trouble-free service and available in sizes and capacities
to meet virtually all heating system requirements. The Vari-Draft
control permits adjustment to individual job requirements.
In-Line Draft Inducer
Full Line Lit
In-Line Draft Inducer Ref Guide
CSA1 Chimney Stack Assist Lit
CSA1 Chimney Stack Assist Inst
DJ-3, D-3, HD, I, IL, XL Specs
DJ-3, D-3, HD, I, IL, XL Inst
PS1505 Fan Prover Inst
Vents/Chimneys utilizing In-Line Draft
Inducers must be vertically terminated above the roof line.
NEEDED TO CONFORM WITH NATIONAL MECHANICAL CODES
Fan Prover Safety Interlock
To satisfy national mechanical codes for oil and gas installations,
Draft Inducers must be properly interlocked with burner circuits.
The PS1505 Fan Proving Switch monitors pressure within the Inducer housing
to verify Inducer operation. Used in conjunction with the UC1
Universal Control, it assures compliance with codes and simplifies
electrical interlock with all 24/115 VAC burner circuits. The PS1505
is not compatible with millivolt gas valves.
Chimney Stack Assist Kit for Orphaned
- Eliminates Need for Chimney Liner When Venting
Water Heaters in Oversized Chimneys
- Prevent Roof Fall Liabilities
As a result of
upgrades to direct vent condensing furnaces, water heaters are often
orphaned and left to vent in chimneys that are oversized after the vent
connector from the old furnace is capped. This can lead to condensation
and flue gas spillage problems. The CSA1 allows a water heater to be
vented through an existing vent connector into an oversized chimney
without adding a chimney liner.
The CSA1 Kit offers the
- Mechanical assist fan protects against condensation callbacks
and flue gas spillage problems.
- Installing the CSA1 Kit is a one-person job and doesn’t require
- By eliminating the liner, the contractor doesn’t need two
techs on the job and keeps techs away from potential roof fall
- The CSA1 Kit includes a draft hood Linear Limit Safety to
lock out the water heater in case of sustained flue gas spillage.
The UC1 is a standardized control for Tjernlund
Inducers/Venters. It offers many installation, operational and safety
The UC1 can be interlocked with virtually any burner control circuit.
Features include: adjustable pre & post purge, LED status / diagnostic
indicators, 10 second prover switch delay to avoid burner start up and
wind induced short cycling. Interlocks with any 24-120 VAC burner
control circuit and also includes “dry” contact actuation option. Selectable
voltage eliminates false activation by burner control circuits. After
each burner cycle the UC1 will continue to operate in post-purge mode to
allow the Inducer/Venter to purge the heater and vent of residual flue
gases. A factory post-purge time is set at 2 minutes and is adjustable
up to 16 minutes.
|Multiple Appliance Controls
Models MAC1E, MAC4E
The MAC1E Multiple Appliance Control is used
in conjunction with the UC1 Universal Control to easily interlock up to
one additional 24 VAC, 115 VAC or millivolt controlled appliance.
It activates the Venter through its connections to the UC1 and in turn
relies on the UC1 Fan Prover safety circuit (P1 & P2) to allow its
interlocked appliances to operate. Any pre/post-purge settings on
the UC1 will be defaulted to the MAC1E. The MAC1E puts an end to difficult
and costly job site wiring nightmares. Circuit board housed in oversized
18 gauge electrical box with multiple knock-outs for easy wiring connections.
|The MAC4E Multiple Appliance Control is used in
conjunction with the UC1 Universal Control to easily interlock up to 4
additional 24 VAC, 115 VAC or millivolt controlled appliances. It
activates the Venter through its connections to the UC1 and in turn relies
on the UC1 Fan Prover safety circuit (P1 & P2) to allow its interlocked
appliances to operate. Any pre/post-purge settings on the UC1 will
be defaulted to the MAC4E. The MAC4E puts an end to difficult and costly
job site wiring nightmares. Circuit board housed in oversized 18
gauge electrical box with multiple knock-outs for easy wiring connections.
|Millivolt Safety Interlock Kit
For use with the 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.
|Barometric Draft Controls Models:
DC4, DC5, DC6, DC7, DC8, DC9, DC10
DC4G, DC6G, DC7G, DC8G, DC9G, DC10G
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 equipment. 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 applications with vent
diameters from 4"-10", choose the DC4G thru DC10G.
MODEL SECTION TABLE
AND ELECTRICAL DATA
utilizing In-Line Draft Inducers must be vertically terminated above the
roof line. Do not use for
side wall venting. Consult factory for proper Gas
or Oil Side
Wall Vent options. Tjernlund's Fixed &
Variable Speed Specified Systems are also available with virtually
Inputs shown above are believed
to be maximum capacities for inducers, when mounted on pipe sizes shown
for ordinary jobs where a
moderate amount of mechanical induced draft is required.
Consideration is given to typically
higher static pressure requirements for larger installations, for the type
of fuel burned, and for the
type of draft control installed.
Some ratings may only be valid
for extremely short vent lengths due to excessive pressure loss; i.e. the
gas firing with draft hood
in 10" pipe at 2,080,000 BTU/hr.
Where pressure requirements
are unknown, or believed to be unusually severe, ask for complete performance
curves or consult factory.
Draft Inducers should be installed
in single wall vent pipe to assure proper performance.