Tjernlund UC1 Universal Control (Version X.06) 8504107 Rev D 07/05 - Manual (Page 4)

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Tjernlund Products welcomes your comments and questions. Address all correspondence to:
Customer Service • Tjernlund Products, Inc. • 1601 Ninth Street • White Bear Lake, MN 55110-6794
Call us toll free at 800-255-4208, visit our web site @ www.tjernlund.com or email us at [email protected].
TABLE OF CONTENTS
Page (s)
Description and General Information...............................................................................................................................1
Installation Restrictions and Cautions ........................................................................................................................1, 2
UC1 Universal Control Board Features ..........................................................................................................................2
LED Status / Fault Indicators and Fault Retrieval from Memory .................................................................................2, 3
Pre / Post-Purge & Pre-Cycle Prover Status Check Settings......................................................................................3, 4
UC1 Installation ..............................................................................................................................................................4
Electrical Wiring
Specificatons, Warnings, Sequence of Operation & Internal Schematic .....................................................4, 5
Venter Ground, Motor and Prover Safety Circuit Connections ........................................................................6
Multiple and Milivolt Appliance interlocks .........................................................................................................6
Wiring to Gas Fired Appliance .................................................................................................................6, 7, 8
Wiring to Oil Fired Equipment ..............................................................................................................9, 10, 11
UC1 Operation and Draft Check .............................................................................................................................11, 12
Troubleshooting Electrical Problems .................................................................................................................12, 13, 14
Warranty & Replacement Parts .....................................................................................................................................14
DESCRIPTION
The UC1 is the new standard interlock control for Tjernlund's full line of 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
24-115 VAC burner control circuit and also includes “dry” contact actuation option. 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, see “Pre / Post Purge and Prover Status Check Dip Switch Settings” on page 3.
GENERAL INFORMATION
Each UC1 is electrically factory line tested before shipment.
After opening carton, inspect thoroughly for hidden damage. If any damage is found notify freight carrier and your distributor
immediately and file a concealed damage claim.
Throughout the rest of this installation manual Venter will be synonymous with Power Venter, Draft Inducer or In-Forcer.
INSTALLATION RESTRICTIONS
1. The UC1 Prover Status Check is activated from the factory. When activated the UC1 Universal Control checks across the
P1 & P2 safety circuit Fan Prover to verify that the Fan Prover switch is “Open” upon a call for heat and not stuck “Closed”. See
“P1 & P2 Fan Prover Safety Circuit “Open” Upon Appliance Call”, page 4 for details.
2. A Venter post-purge on the UC1 has been factory set at 2 minutes. Confirm that dip switch #5 is in the up or "on" position. Oil
fired equipment requires that the post-purge be long enough to eliminate post cycle nozzle drip odor. A longer post-purge may
be necessary for longer vent runs or high heat retention, refractory lined combustion chambers. A shorter post-purge may be
desired for gas installations. If using the UC1 to control our combustion air In-Forcers a post-purge may not be desired. See “Pre /
Post Purge and Prover Status Check Dip Switch Settings”, page 3 for details.
3. The UC1 is intended for indoor installation only. Do not mount the UC1 on a heat source that exceeds 140oF (60oC).
Examples of improper mounting surfaces include vent pipe, top of heater casing or any place where radiant or convective heat
would cause the junction box temperature to exceed 140oF (60oC).
CAUTIONS
The UC1 must be installed by a qualified installer (an individual properly licensed and/or trained) in accordance with all local
codes or, in their absence, in accordance with the appropriate National Fire Protection Association #31, #54, #211 and the
National Electrical Code.
Failure to install, maintain and/or operate the UC1 in accordance with manufacturer's instructions may result in conditions
which can produce bodily injury and property damage.
1. The installer must verify that the BTU/hr. input of the appliance does not exceed the recommended input of the any Venter
being controlled by the UC1. Refer to the Venter, Inducer or In-Forcer installation instructions for capacities.
2. Disconnect power supply from the UC1 and heating equipment when making wiring connections and servicing the UC1.
Failure to do so may result in personal injury and/or equipment damage. LED #6 (RED) should be off with power removed.