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is your  Auto-Draft®

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Draft Inducer Source 
Servicing Home Owners & Contractors since 1948

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CONTROLS

 
 
 
 
UC1 Universal Control 

The UC1 is the new standard interlock control for Tjernlund's full line of Fixed Speed Power Venters, Draft Inducers and Combustion Air In-Forcers. It 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 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.

The UC1 Universal control is standard in the following models:
HSJ, HS1, HS2, HS3, HS4, HS5
SS1, SS1C, SS1R, SS2
 

MAC1E Multiple Appliance Control (Compatible with UC1 Universal Control only)

The MAC1E 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 with Fixed Speed Auto-Draft Venters, Power Venters, Draft Inducers, or In-forcers.  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.
 
MAC4E Multiple Appliance Control (Compatible with UC1 Universal Control only) 
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 with Fixed Speed Auto-Draft Venters, Power Venters, Draft Inducers, or In-forcers.  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. MAC-3
 
 
Gas Water Heater Interlock Kits

WHKE MILLIVOLT INTERLOCK KIT FOR USE WITH UC1 CONTROL
For use with the UC1 Universal  Control, MAC1E or MAC4E auxiliary controls.  The WHKE gas pressure switch actuates the Inducer /Venter through the A-B dry contacts on UC1, MAC1E or MAC4E.  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 / Venter 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 / Venter, add a WHKE and a MAC1E.
WHK-2
 

 

 
 
EVERYTHING NEEDED TO CONFORM WITH NATIONAL MECHANICAL CODES
PS1505 Installation
Draft Inducer

Vents/Chimneys utilizing In-Line Draft Inducers must be vertically terminated above the roof line.

Fan Prover Safety Interlock
Model PS1505
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.
 

 


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