Tjernlund 950-8804UC1 User Manual

TJERNLUND PRODUCTS, INC.

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

950-8804 UNIVERSAL CONTROL LED STATUS AND FAULTS ADDENDUM (VERSION X.04)

IMPORTANT: The fault code indicators and LED sequencing have been changed with this software version of UC1 board. The

Pre-Purge settings, LED Status & Fault Indicators and Troubleshooting sections of your old instruction manual may not apply.
For Sideshot Series models SS1, SS1C & SS2 or HS-Series models HSJ,1,2,3,4,5 you can download updated instruction manuals
from our web site for your models which include the X.04 version updates. NOTE: Adhere appropriate included label over

existing label in UC1 or SideShot electrical box. Also adhere “Checking Memory for Last Fault Code” sticker on inside
of UC1 or SideShot SS1 Series electrical box. On SS2 Series adhere to underside of electrical box.

IMPORTANT: Note Dip Switch settings on existing UC1 circuit board so that

those same settings can be positioned on this replacement circuit board.

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. Indicates Venter

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

LED STATUS INDICATORS

LED 5 (Red) Steady On 115 VAC power to UC1 circuit board
LED 4 & 5 (Red) Flashing Alternately Pre-purge operation (Pre-Purge options 0, 5, 20, 35 seconds)
LED 4 & 5 (Red) Flashing in Unison Post-Purge operation (Post-Purge options 0, 30 seconds or 1, 2, 4, 8, 16 minutes)
LED 4 Flashes Continuously* Fan Prover opened for more than 10 seconds during burner cycle.

(Venter will run for 10 minutes, attempting to make Fan Prover)

LED FAULT INDICATORS

Fault conditions are indicated by counting the number of times LED 4 flashes.
LED 4 Flashes 2 Times Fan Prover was in electrically closed position prior to venter operation.
LED 4 Flashes 3 Times* Fan Prover does not close within 60 seconds after call for heat.
LED 4 Flashes 4 Times* Fan Prover did not re-close after 10 minutes of Venter operation.
LED 4 Flashes 5 Times* Fan Prover opened for more than 10 seconds during burner cycle but closed within 10 minutes.

* Investigate cause of Fan Prover short cycling such as; Firing burner at capacities or temperatures exceeding Venter limits,

excessive vent pipe runs, elbows directly on venter discharge, high winds, plugged / kinked Fan Prover sensing tube or a
faulty Fan Prover switch. In-Forcer model’s intake screen and prefilter, if applicable, should be cleaned if necessary.

IMPORTANT: Fault codes will automatically be displayed after the given fault condition occurs. If the call for heat
interlock signal or 115 VAC power is removed, the UC1 circuit board will reset and the fault will not be automatically
displayed. The fault code will be stored in memory. Any new fault will replace any previous fault.

CHECKING MEMORY FOR LAST FAULT CODE
IMPORTANT: Prior to accessing the fault code memory, note the settings of the dip switches so that they can be returned to

their original Pre / Post-Purge positions. When power is supplied to the UC1 use caution when moving dip switches.
The last fault code can be retrieved at any time by setting all dip switches 1-8 to the up, or “on” position. The last fault code, or

lack there of, will be indicated by counting the number of times LED 4 flashes. By moving any of the dip switches back to their
original position, the fault code will be cleared. NOTE: The UC1 board must have its 115 VAC power supply present when any
of the (1-8) dip switches are moved back to their original position for the fault code to clear.

P/N: 8505017 ©2003 TJERNLUND PRODUCTS, INC. ALL RIGHTS RESERVED REV. A 05/03

REV. B 05/03

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.04

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 © 2003, 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 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 & 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 #5 (RED) should be off with power removed.

1

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. Indicates Venter prover is

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

2

LED STATUS INDICATORS

LED #4 & #5 (Red) Flashing Alternately = Venter in Pre-purge. (Pre-Purge options 0, 5, 20, 35 seconds)
LED #4 & #5 (Red) Flashing in Unison = Venter in Post-Purge. (Post-Purge options 0, 30 seconds or 1, 2, 4, 8, 16 minutes)

LED #4 Flashes Continuously = Fan Prover opened for more than 10 seconds during burner cycle.

(Venter will run for 10 minutes, attempting to make Fan Prover)

LED FAULT INDICATORS

Fault conditions are indicated by counting the number of times LED #4 (Red) flashes.
LED #4 Flashes 2 Times Fan Prover was in electrically closed position prior to venter operation.

LED #4 Flashes 3 Times Fan Prover does not close within 60 seconds after call for heat.
LED #4 Flashes 4 Times Fan Prover did not re-close after 10 minutes of Venter operation.
LED #4 Flashes 5 Times Fan Prover opened for more than 10 seconds during burner cycle but closed within 10 minutes.

Investigate cause of Fan Prover short cycling such as; Firing burner at capacities or tempera­tures exceeding Venter limits, excessive vent pipe runs, elbows directly on venter discharge,
high winds, plugged / kinked Fan Prover sensing tube or a faulty Fan Prover switch. In-Forcer
model’s intake screen and prefilter, if applicable, should be cleaned if necessary.

IMPORTANT: Fault codes will automatically be displayed after a fault condition occurs. If the call for heat interlock sig­nal or 115 VAC power is removed, the UC1 board will reset and the fault will be stored in memory instead of displayed.
Any new fault will replace any previous fault.

CHECKING MEMORY FOR LAST FAULT CODE
IMPORTANT: Prior to accessing the fault code memory, note the settings of the dip switches so that they can be returned to their

original Pre / Post-Purge positions. When power is supplied to the UC1 use caution when moving dip switches.
The last fault code can be retrieved at any time by setting all dip switches 1-8 to the up, or “on” position. The last fault code, or

lack there of, will be indicated by counting the number of times LED 4 flashes. By moving any of the dip switches back to their
original position, the fault code will be cleared. NOTE: The UC1 board must have its 115 VAC power supply present when any of
the (1-8) dip switches are moved back to their original position for the fault code to clear.

PRE / POST PURGE AND PROVER STATUS CHECK DIP SWITCH SETTINGS

Remove power to UC1 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: Nuisance equipment lockouts may occur if Venter pre-purge is run­ning in conjunction with and is longer than any equipment timing circuit. Pre-purge settings must be shorter than burner control
lockout time unless wired prior to burner control timing circuit (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

1ON2 3 4 5 6 7 8 9

Prover Status
Check Activated

POST-PURGE SETTINGS (SEE “POST-PURGE” ABOVE PRIOR TO SETTING)

3

ON

ON

4

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

4 Minutes 8 Minutes 16 Minutes

865 7 3 5 6 7 8 3

4

5 6 7 8 3 7546 8

4

1 Minute0 Seconds 30 Seconds 2 Minutes

3