TJERNLUND UC1 UNIVERSAL CONTROL (VERSION X.02 OR EARLIER) 8504107 REV 0802, UC1 Installation Instructions Manual

REV. 8/02

TJERNLUND PRODUCTS, INC.

1601 Ninth Street • White Bear Lake, MN 55110-6794
PHONE [phone] • [phone] • FAX [phone]
Visit our web site • www.tjernlund.com

VERSION

X.02 OR

EARLIER

MODEL UC1

INSTALLATION INSTRUCTIONS

Recognize this symbol as an indication of important Safety Information!

!

OWNER INSTRUCTIONS, DO NOT DESTROY

THESE INSTRUCTIONS ARE INTENDED AS AN AID TO QUALIFIED, LICENSED
SERVICE PERSONNEL FOR PROPER INSTALLATION, ADJUSTMENT AND
OPERATION OF THIS PRODUCT. READ THESE INSTRUCTIONS THOROUGHLY
BEFORE ATTEMPTING INSTALLATION OR OPERATION. FAILURE TO FOLLOW
THESE INSTRUCTIONS MAY RESULT IN IMPROPER INSTALLATION, ADJUST­MENT, SERVICE OR MAINTENANCE POSSIBLY RESULTING IN FIRE, ELECTRI­CAL SHOCK, CARBON MONOXIDE POISONING, EXPLOSION, OR PERSONAL
INJURY OR PROPERTY DAMAGE.

DO NOT DESTROY. PLEASE READ CAREFULLY AND

KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.

Copyright © 2002, Tjernlund Products, Inc. All rights reserved P/N 8504107

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 [e-mail].

TABLE OF CONTENTS

Page (s)

Description and Specifications ........................................................................................................................................1

Installation Restrictions .................................................................................................................................................1

Cautions .....................................................................................................................................................................1, 2

UC1 Universal Control Board Features ..........................................................................................................................2

LED Status & Fault Indicators .........................................................................................................................................2

Pre / Post-Purge & Prover Status Check Settings...........................................................................................................3

Electrical Wiring

Warnings, Sequence of Operation & Internal Schematic .................................................................................4

Wiring to Gas Fired Appliance .................................................................................................................5, 6, 7

Wiring to Oil Fired Equipment ......................................................................................................................8, 9

UC1 Operation and Draft Check .............................................................................................................................10, 11

Troubleshooting Electrical Problems.......................................................................................................................10, 11

Warranty & Replacement Parts...............................................................................................................................11, 12

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
24-120 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 16 minutes, see “Pre / Post-purge 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
“Prover Status Check Settings”, page 3 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 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 #5 (RED) should be off with power removed.

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3.

All installation restrictions and instructions in the Venter, Inducer or In-Forcer installation instructions must be adhered to when

using the UC1.

4. Make certain power source is adequate for the UC1 and Venter requirements. Do not add equipment to a circuit when the total
electrical load is unknown.

UC1 UNIVERSAL CONTROL BOARD FEATURES

P1 - P2 SAFETY CIRCUIT
TERMINALS

1 mA @ 5VDC.

SEE WARNING # 1.

DIP SWITCH SETTINGS

Pre-Purge (1-2)
Post-Purge (3-8)
Prover status check (9)
See “Pre / Post Purge &
Prover Status Check Dip
Switch Settings”.

LED STATUS LIGHTS

See “LED Status & Fault
Indicator Section” for details.

APPLIANCE CALL
VOLTAGE SELECTION

IMPORTANT

Place RED voltage jumper in
proper location based on
appliance call interlock volt­age. SEE WARNING # 2.

J1- J2 CALL
JUMPER

Used when the call signal is
used as the “proven” return
signal to the appliance. See
wiring section for details.

APPLIANCE INTERLOCK
TERMINAL BLOCK (A-B, 1-4)
A - B - Dry Contact call. 3 mA @ 5VDC.

SEE WARNING # 1.

1 - 24 or 115 VAC intercepted call.

IMPORTANT: RED voltage jumper must

match intercepted call voltage.

2 - 24V common or 115V Neutral.
3 - Common terminal to appliance relay con-

tacts. IMPORTANT: J1-J2 jumper routes
call voltage at terminal 1 to 3. Remove
J1-J2 jumper if a different voltage source is
provided to terminal 3.

4 - Normally open terminal of appliance relay.

Will be energized from terminal 3 if safety
circuit is “proven”.

P1 P2 C GND F

LED 1 (AMBER)
LED 2 (GREEN)
LED 3 (GREEN)
LED 4 (RED)
LED 5 (RED)

DRY

24 V

115 V

A B 1 2 3 4 L N

C, GND, F AUXILIARY DEVICE
COMMUNICATION TERMINALS

2 mA @ 5VDC. For Tjernlund MAC1E or
MAC4E auxiliary devices. SEE WARNING # 1.

(1 9)

APPLIANCE
INTERLOCK

RELAY

J1 J2 XL XN

L / N - 115 VAC POWER
SUPPLY BLOCK

115 VAC / 50-60 Hz
Circuit protection provided by installer.

SEE WARNING # 3.

VENTER

MOTOR

RELAY

N M MTR

APPLIANCE INTERLOCK
RELAY

1 HP MAX LOAD across
terminals 3 & 4.

VENTER MOTOR RELAY

1 HP MAX LOAD from
terminals L to MTR & M.

XL / XN AUXILIARY DEVICE
POWER TERMINALS

115 VAC - Maximum of 0.15 Amps.
Only connect to Tjernlund auxiliary devices.

SEE WARNING # 1.

MTR & M / N LOAD TERMINALS
FROM VENTER MOTOR RELAY

Used to drive Venter Motor.
1 HP MAX LOAD across terminals MTR & M / N.

# 1. Power supplied by board. Do not supply power to this area or control damage may result.
# 2. Do not supply power to the appliance interlock block with the call selector in the “DRY” position.

Control damage may result if power is supplied.

# 3. Circuit protection must be provided by the installer. 16 Amps is the maximum current allowed for this device at terminal L.

A 15 Amp circuit breaker is recommended.

I

VETI

LED STATUS & FAULT INDICATORS

LED INDICATOR LIGHTS

LED #1 (Amber) Appliance call for heat.
LED #2 (Green) Safety circuit through P1 & P2 (Venter Fan Prover) is verified “Open” upon start-up. Burner circuit is energized

with contact closure from terminal 3 to 4. Also verifies Venter prover is closed during run cycle.
LED #3 (Green) Power switched to Venter motor from L to MTR & M.
LED #4 (Red) Status indicator.
LED #5 (Red) 115 VAC power supplied to board. Also used as status indicator.

2

LED INDICATOR LIGHT STATUS & FAULTS

LED #4 & #5 Flashing Alternately = Prover start up fault. Venter Prover contacts “Closed” across P1 & P2 upon appliance call

PRE-PURGE SETTINGS

POST-PURGE SETTINGS

before Venter is turned on. Prover status check must be activated, see page 3.

LED #4 & #5 Flashing in Unison = Fan Prover circuit is “Open” longer than 60 seconds on start-up or 10 seconds during run

cycle. Venter Prover contacts are not staying “Closed” across P1 & P2 safety circuit.
LED #4 Flashing & #5 on Continuous = System in Pre-Purge. (Pre-Purge options 0, 15, 30, 60 seconds)
LED #5 Flashing & #4 on Continuous = System in Post-Purge. (Post-Purge options 0, 30 seconds or 1, 2, 4, 8, 16 minutes)

IMPORTANT: To reset faults, verify fault by checking the LEDs and then remove call for heat.

PRE / POST PURGE AND PROVER STATUS CHECK DIP SWITCH SETTINGS

Remove power to Venter and heating equipment when installing, servicing or changing dip switch settings. Failure to do so may result in
personal injury and/or equipment damage. LED #5 (RED) should not be on if 115 VAC supply power is removed from the control.

Pre-purge

Used for a Venter with longer vent runs to get draft fully established throughout the vent system prior to burner ignition. Also bene­ficial for negative pressure prone environments. IMPORTANT: Pre-purge settings must be shorter than primary control lockout
time unless wired prior to primary control (i.e. aquastat / thermostat).

Post-purge

A Venter post-purge 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
or when using the UC1 to control a combustion air In-Forcer.

DIP SWITCH NUMBERING

Pre-Purge Post-Purge

Prover Status
Check Activated

ON

2

ON

ON

1

PRE-PURGE SETTINGS

1 2 1 2 1 2 1 2

4

6

3

5

8 9

7

0 Seconds 15 Seconds 30 Seconds 60 Seconds

POST-PURGE SETTINGS

ON

43 4865 7 3 5 6 7 8 3 4 5 6 7 8 3 754 6 8

1 Minute0 Seconds 30 Seconds 2 Minutes

ON

43 4865 7 3 5 6 7 8 3 4 5 6 7 8

4 Minutes 8 Minutes 16 Minutes

P1 & P2 FAN PROVER SAFETY CIRCUIT “OPEN” UPON APPLIANCE CALL

Prover Status
Check Activated

The Prover Status Check is activated from the factory. When activated the UC1 Universal Control
checks across P1 & P2 safety circuit (Fan Prover) to verify that the Fan Prover switch is “Open”
upon a call for heat and not stuck “Closed”. IMPORTANT: This must always be in the down

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“Activated” position when side wall venting. When using the PS1505 Fan Prover in conjunc­tion with a draft inducer on a vertical termination stack, “natural draft” may be sufficient to keep
Prover contacts closed prior to a call for heat by an interlocked appliance. This is the only condi­tion where this safety feature should be deactivated. Push up or “ON” to deactivate.

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UC1 INSTALLATION

115 VAC CONNECTION

Do not mount the UC1 junction box 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.

The UC1 is intended for indoor installation only.
Using the key hole slots on the back of the UC1 junction box as a template, mark 4 holes on the mounting surface, drill pilot holes

if necessary, and secure junction box using provided screws.
The UC1 has a 2 foot whip that contains a ground lead and the leads to power the Venter motor and connect to the Fan Prover. If

it is desirable to mount the UC1 more than 2 feet from the Fan Proving Switch an additional electrical junction box and appropriate
length of conduit will be necessary. Any added wire should be 14 gage and a pig tail should be added to each ground wire con­nection so that each electrical junction box is grounded. See diagram below for a typical UC1, Fan Prover and Venter installation.

TYPICAL UC1, FAN PROVER AND VENTER INSTALLATION

ALUMINUM SENSING TUBE, 4 FT. MAXIMUM LENGTH

2 FT. MAXIMUM LENGTH UNLESS ADDITIONAL

INSTALLER-SUPPLIED

BURNER INTERLOCK

CONNECTION

CONDUIT AND J-BOX ARE ADDED

FAN PROVER

INSTALLER-SUPPLIED

POWER

REQUIREMENTS

ADD VENTER MOTOR

LOAD PLUS 1/2 AMP

FOR UC1 LOAD

EXTERNAL

POWER SWITCHING

CAPACITY

EXTERNAL

CALL TRIGGER

METHODS

J1 / J2

JUMPER

SAFETY

CIRCUIT

UC1

UC1 CONTROL

OR

OR

T-BLOCK

L / N

XL / XN

M & MTR

(RELAY K2)

T-BLOCK

3 TO 4

(RELAY K1)

T-BLOCK

A / B

24V
1 / 2

115V

1 / 2

J1 / J2

P1 / P2

INSTALLER-SUPPLIED CONDUIT
AND 3 WIRE, MINIMUM 14 GAGE

VENTER

ELECTRICAL WIRING

ELECTRICAL SPECIFICATIONS

120 VAC ±10 %, 50/60 Hz
CIRCUIT PROTECTION PROVIDED BY INSTALLER

150 mA MAX @ 120 VAC, 50/60 Hz
CAN ONLY BE CONNECTED TO TJERNLUND-SPECIFIED AUXILIARY DEVICE

DURING OPERATION THE CONTROL USES 50 mA MAX @ 120 VAC

MOTOR - 1 H.P. MAX. @ 120 VAC, 50/60 Hz
GENERAL PURPOSE - 15A @ 120 VAC, 50/60 Hz

MOTOR - 1 H.P. MAX. @ 120 VAC, 50/60 Hz
GENERAL PURPOSE - 15A @ 120 VAC, 50/60 Hz
RESISTIVE - 10A @ 28 VDC PILOT DUTY - 470 VA

USER-PROVIDED CONTACT CLOSURE FROM A TO B. SIZE CONTACT CLOSURE TO HANDLE
3 mA @ 5 VDC. MOVE RED VOLTAGE JUMPER TO "DRY" LOCATION. DO NOT SUPPLY POWER.

USER-PROVIDED 24 VAC AT TERMINALS 1 & 2. 1 = CALL HOT, 2 = COMMON. CONTROL
REQUIRES 5 mA @ 24 VAC TO TRIGGER. MOVE RED VOLTAGE JUMPER TO "24V" LOCATION.

USER-PROVIDED 115 VAC AT TERMINALS 1 & 2. 1 = CALL LINE, 2 = NEUTRAL. CONTROL
REQUIRES 1 mA @ 115 VAC TO TRIGGER. MOVE RED VOLTAGE JUMPER TO "115V" LOCATION.

USED TO JUMP CALL HOT (24 VAC) OR CALL LINE (115 VAC) FROM TERMINAL 1 TO TERMINAL 3.
REMOVE J1-J2 JUMPER IF A DIFFERENT VOLTAGE SOURCE IS PROVIDED TO TERMINAL 3.

CONNECTED TO FAN PROVER.
1 mA @ 5 VDC. DO NOT SUPPLY POWER HERE.

D/N 9183006H

All wiring from the UC1 to the appliance must be appropriate Class 1 wiring as follows: installed in rigid metal conduit, intermediate
metal conduit, rigid non-metallic conduit, electrical metallic tubing, Type MI Cable, Type MC Cable, or be otherwise suitably protected
from physical damage.

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