Hydronics
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Tjernlund GPAK-J Side Wall Vent System
4" Diameter Vent System for up 150k BTU-
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All operating components located indoors for weather
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Capacities up to 250,000 BTU/hr.
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Accommodates vent pipe runs up to 100 equivalent feet.
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Regulated, consistent draft throughout burner cycle.
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Built-in Fan Proving Switch interlocks with gas valve.
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Available with 24-volt Relay or Post Purge Timer/Relay.
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Kit includes everything needed for installation, except vent pipe. (*GPAK* includes DC-4 Draft Control)
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Durable, heavy-duty aluminum Vent Hood.
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AGA design certified for gas furnaces, boilers, pool
- heaters, unit heaters and commercial water heaters.
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$199.00 -
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Tjernlund MAC-4E
Enables Appliances to be Interlocked in Conjunction with UC1 universal controlThe MAC4E is used in conjunction with the UC1 Universal Control to interlock up to four additional 24 VAC, 115 VAC or millivolt (Dry Contact) 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. Two LEDs for each appliance interlock block are provided on the MAC4E. LEDs #1, 3, 5, 7 (AMBER) shows an appliance call for heat. LEDs #2, 4, 6, 8 (GREEN) shows that the burner is approved to fire after the Venter Fan Prover safety circuit through the UC1 is completed. The MAC4E also has an LED #9 (RED) which means power is supplied to the MAC4E through the UC1.$596.00 -
Tjernlund D-3 In-line Model Draft Inducer
In-line Draft Inducer. Height: 9-1/8", Width: 9-1/2", Depth: 7", Pipe Slot Width: 3-1/8", Pipe Slot Height: 8-5/8"TJERNLUND AUTO-DRAFT® Inducers assure positive draft when restricted boilers and furnaces, poor chimneys or slight negative pressures in buildings prevent proper exhaust of combustion gas. The venturi action of Tjernlund Auto-Draft Inducers starts air moving smoothly. These units are quick and easy to install and completely automatic in operation. Tjernlund’s unique design and durable construction makes them trouble-free and reduces maintenance to a minimum. The Vari-Draft Control permits adjustments to the individual job requirement.$303.00