TJERNLUND 4, 5 WITH UC1 UNIVERSAL CONTROL (VERSION X.06) 8504111 REV C 0705, UC1, HS4, HS5 User Manual

IMPORTANT!!! UC1 BOARD VERSION X.06 UPDATES

LED INDICATOR LIGHTS

LED #1 (Amber) Appliance call for heat.
LED #2 (Blue) Safety circuit through P1 & P2 (Venter Fan Prover and/or High Limit). Indicates Venter prover is closed during run cycle.

Burner circuit is energized with Interlock Relay 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) Used as a status indicator.
LED #6 (Red) 115 VAC power supplied to board.

P/N: 8505017 ©2005 TJERNLUND PRODUCTS, INC. ALL RIGHTS RESERVED REV. B 07/05

TJERNLUND PRODUCTS, INC.

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

IMPORTANT:

For 950-8804 UC1 Replacement Board Kits: If this is a 950-8804 UC1 board kit and you are replacing an existing UC1 board with this

new board, note Dip Switch settings on existing UC1 circuit board so that those same settings can be positioned on this replacement circuit
board. 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.

For SideShot Series SS1 Models: The Pre-Cycle Prover Status Check is deactivated from the factory on the SS1 Series. Because of the
low set point of the SS1 Fan Prover (as low as .03" w.c.) cross winds may cause the Fan Prover to close prior to a call for heat. Activating the
Prover Status Check on the SS1 may cause nuisance lockouts. Important: Deactivate the Pre-Cycle Prover status check if installing this board
on a new or existing SS1 installation by pushing the #9 dip switch up or “ON” to disable.

For Draft Inducers with the UC1: Natural draft or winds may be sufficient to close the fan prover switch contacts prior to a call for heat
when using the PS1505 fan prover with a draft inducer. Keeping the Pre-Cycle Prover Status Check activated may cause nuisance lockouts.
Important: Deactivate the Pre-Cycle Prover status check if installing this board on a new or existing draft inducer installation by pushing the #9
dip switch up or “ON” to disable.

IMPORTANT: This upgraded circuit board features:

A new #6 power LED

Constant red when 115 VAC is supplied to L & N.

A new color for the #2 LED

Constant blue when fan prover safety circuit is closed.

A revised #5 LED

With no call for heat present, flashes 3 seconds on /
3 seconds off if microcontroller is working properly.

LED # 2 now BLUE
(previously GREEN)

New LED # 6 RED
115V power supplied
to UC1 L & N terminals

LED # 5 RED With no
call for heat, flashes 3
seconds on / 3 seconds
off if microcontroller is
working properly.

NEW X.06 VERSION UC1 BOARD FEATURES

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

LED 6 (RED) POWER LED

DRY

24 V

115 V

APPLIANCE
INTERLOCK

RELAY

VENTER

MOTOR

RELAY

A B 1 2 3 4 L N

J1 J2 XL XN

P1 P2 C GND F

(1 9)

N M MTR

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 #5 (Red) Flashing Intermittently = With no call for heat, flashes 3 seconds on / 3 seconds off if microcontroller is working properly.

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.

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.

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.

Copyright © 2005, Tjernlund Products, Inc. All rights reserved. P/N 8504111

REV. C 07/05

OWNER INSTRUCTIONS, DO NOT DESTROY

Recognize this symbol as an indication of important Safety Information!

NOTE: FLUE GAS TEMPERATURES MUST NOT EXCEED

600oF AT VENT SYSTEM INLET.

THESE INSTRUCTIONS ARE INTENDED AS AN AID TO QUALIFIED, LICENSED
SERVICE PERSONNEL FOR PROPER INSTALLATION, ADJUSTMENT AND
OPERATION OF THIS UNIT. 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, PERSONAL
INJURY OR PROPERTY DAMAGE.

!

DO NOT DESTROY. PLEASE READ CAREFULLY AND KEEP IN

A SAFE PLACE ON JOB SITE FOR FUTURE REFERENCE.

MODELS

HS3
HS4
HS5

FOR NATURAL GAS OR LP

FAN PROVER

VENTER

UC1

TJERNLUND PRODUCTS, INC.

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

INCLUDES UC1

UNIVERSAL CONTROL

UC1 VERSION

X.06

1

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)

HS3,4,5 DESCRIPTION ............................................................................................................................................... 1

HS3,4,5 SIZING, MODEL SELECTION & SPECIFICATIONS ................................................................................... 1-2

INSTALLATION RESTRICTIONS................................................................................................................................... 3

INSTALLER CAUTIONS ............................................................................................................................................... 3

UC1 UNIVERSAL CONTROL BOARD FEATURES ......................................................................................................4

LED STATUS / FAULT INDICATORS AND FAULT RETRIEVAL FROM MEMORY....................................................4, 5

PRE / POST-PURGE & PROVER STATUS CHECK SETTINGS...............................................................................5, 6

VENT HOOD LOCATION ............................................................................................................................................. 6

POWER VENTER MOUNTING .................................................................................................................................... 6

VENT PIPE INSTALLATION ...........................................................................................................................................7

UC1, FAN PROVING SWITCH AND SENSING TUBE INSTALLATION ................................................................... 7-8

WIRING ..........................................................................................................................................................................8

WARNINGS, SEQUENCE OF OPERATION & INTERNAL SCHEMATIC ....................................................8-9

WIRING CONNECTIONS FROM UC1 TO FAN PROVER AND MOTOR .......................................................9

MULTIPLE OR MILLIVOLT APPLIANCE INTERLOCKS .................................................................................9

WIRING DIAGRAMS WITH A SINGLE GAS APPLIANCE........................................................................10-12

UC1 OPERATION CHECK, DRAFT ADJUSTMENT AND COMBUSTION AIR.......................................................12-13

MAINTENANCE .......................................................................................................................................................... 13

TROUBLESHOOTING .............................................................................................................................................14-15

WARRANTY & REPLACEMENT PARTS ......................................................................................................................15

DESCRIPTION

The Tjernlund Power Venter models HS3, HS4 and HS5 are designed to Side Wall or Vertically vent Natural and LP Gas appliances.
After each burner cycle the Venter will continue to operate in post-purge mode 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 5. The Venter
features a safety system consisting of the integral UC1 Universal Control and a Fan Proving Switch. These devices monitor the
Venter’s performance and will interrupt the main burner if a venting malfunction is detected.

VENTER SPECIFICATIONS

VENTER SIZING

The installer must verify that the Power Venter is sized properly using the selection table on page 2. The installer may reduce the
vent pipe diameter to the size shown in the selection table immediately after the draft hood, draft diverter or barometric draft control.
The vent pipe length shown includes all vent pipe before and after the Power Venter. To calculate the equivalent vent pipe length,
add the straight vent pipe plus 10 feet for every 90 degree elbow and 5 feet for every 45 degree elbow.

If venting multiple appliances with one Power Venter, the total combined BTU/hr. input of all appliances must be added together to
size the Power Venter.

IMPORTANT: Elbows placed directly after discharge on Power Venter may cause erratic operation of Fan Prover. If elbows are

necessary on discharge, allow for a straight section of pipe 3 times the vent diameter being used before installing an elbow.

INLET/OUTLET

UNIT DIMENSIONS (IN)

MODEL

(H) HEIGHT (W) WIDTH

10"18"

HS5 16 1/2"

HS3

HS4

12 1/2"

14 3/4"

8"

8"

13 1/4"

15 1/4"

(D) DEPTH

11"

13"

16 1/2"

2

MODEL SELECTION TABLE AND MOTOR SPECIFICATIONS

UC1 UNIVERSAL CONTROL SPECIFICATIONS

POWER

REQUIREMENTS

EXTERNAL

POWER SWITCHING

CAPACITY

J1 / J2

JUMPER

SAFETY

CIRCUIT

ADD VENTER MOTOR

LOAD PLUS 1/2 AMP

FOR UC1 LOAD

EXTERNAL

CALL TRIGGER

METHODS

J1 / J2

P1 / P2

L / N

3 TO 4

T-BLOCK

T-BLOCK

(RELAY K1)

XL / XN

UC1 CONTROL

M & MTR

(RELAY K2)

T-BLOCK

A / B

24V

1 / 2

115V

1 / 2

OR

OR

USED TO JUMP CALL HOT (24 VAC) OR CALL LINE (115 VAC) FROM TERMINAL 1 TO TERMINAL 3.

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

REMOVE J1-J2 JUMPER IF A DIFFERENT VOLTAGE SOURCE IS PROVIDED TO TERMINAL 3.

120 VAC ±10 %, 50/60 Hz

MOTOR - 1 H.P. MAX. @ 120 VAC, 50/60 Hz

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.

3 mA @ 5 VDC. MOVE RED VOLTAGE JUMPER TO "DRY" LOCATION. DO NOT SUPPLY POWER.

USER-PROVIDED CONTACT CLOSURE FROM A TO B. SIZE CONTACT CLOSURE TO HANDLE

GENERAL PURPOSE - 15A @ 120 VAC, 50/60 Hz

DURING OPERATION THE CONTROL USES 50 mA MAX @ 120 VAC

MOTOR - 1 H.P. MAX. @ 120 VAC, 50/60 Hz

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

CIRCUIT PROTECTION PROVIDED BY INSTALLER

GENERAL PURPOSE - 15A @ 120 VAC, 50/60 Hz

RESISTIVE - 10A @ 28 VDC PILOT DUTY - 470 VA

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.

IMPORTANT:

If wiring the HS-5 motor for 208-230 VAC in
conjunction with the UC1 Universal Control,
a 115 VAC coil, DPST motor contactor rated
for 1 H.P. is required.

3

INSTALLATION RESTRICTIONS

1. The Power Venter may only be installed on Natural Gas or LP Gas appliances.

2. The Power Venter may not be installed on incinerators, incinerating toilets, condensing-type appliances or solid-fuel burning

appliances.

3. The Power Venter shall not be installed on an appliance with an automatic valve having a manual opener unless the manual

opener has been rendered inoperative or the automatic valve has been replaced with a valve not equipped with a manual opener.

4. The Power Venter may only be installed on an appliance equipped with a draft hood, draft diverter or barometric draft control.

5. The Power Venter shall not be installed where the flue gas temperature exceeds 600oF. at the Power Venter inlet. Flue gas

temperature verification:

A) Consult appliance manufacturer for flue gas temperature after dilution by the draft hood, draft diverter or barometric draft control.

B) Measure flue gas temperature at the Power Venter inlet after installation. Temperature should be measured after appliance and

Power Venter have operated for at least 15 minutes, allowing the flue gas temperature to stabilize.

6. The Power Venter must be mounted so that the shaft of the motor remains horizontal to prevent motor bearing wear.

7. Fan Proving Switch must be mounted with diaphragm in a vertical position. Do not mount the Fan Proving Switch on a heat source

that exceeds 140oF. Examples of improper mounting surfaces include vent pipe, venter, top of heater casing or any place where
radiant or convective heat would exceed 140oF.

8. Ambient temperature surrounding Power Venter must not exceed 104o F.

9. The UC1 is intended for indoor installation only. Do not mount the UC1 junction box on a heat source that exceeds 140oF.

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.

INSTALLER CAUTIONS

The Power Venter must be installed by a qualified installer in accordance with these instructions and all local codes or in their
absence in accordance with the latest edition of The National Fuel Gas Code (NFPA #54), The latest edition of the National Electrical
Code (NFPA#70) and the Occupational Safety and Health Act (OSHA) when applicable. Improper installation can create a hazardous
condition such as an explosion, fire, electrical shock or carbon monoxide poisoning resulting in property damage, personal injury or
death.

Failure to install, maintain and/or operate the Power Venter in accordance with manufacturer's instructions may result in conditions
which can produce bodily injury and property damage.

Disconnect the power supply from UC1 and heating equipment when making wiring connections or when working around the fan
wheel and motor. Failure to do so can result in electrical shock, personal injury, death or property damage. LED #6 (RED) should be
off with power removed.

1. The Fan Prover must be wired with the appliance so as to prevent the main burner(s) from firing if the Power Venter malfunctions

or the flue is blocked. It is not safe to use the Power Venter as is on millivolt appliances, such as water heaters which employ a
combination gas valve/temperature controller, since the Fan Prover can not be wired as described in this manual. Millivolt appli­ances require additional interlock controls such as our WHKE kit. See millivolt wiring diagram in this manual for more details.

2. Plan the vent system so that the code required clearances are maintained from plumbing and wiring.

3. To prevent personal injury and equipment damage, disconnect power supply when working on Power Venter.

4. Make certain the power supply is adequate for Power Venter motor requirements. Do not add the Power Venter to a circuit where

the total load is unknown.

5. The installer must verify that the appliance on which the Power Venter will be installed is in a safe operating condition. Consult

appliance manufacturer’s Instructions for details.

6. Plan the vent system layout so that the Power Venter is as close to the point of termination as possible. Vent pipe between the

Power Venter and Vent Hood is acceptable. However, all vent pipe connections after the Power Venter discharge will be under pos­itive pressure during operation and must be sealed with high-temperature caulk or aluminum vent pipe tape to prevent flue gas leak­age into the structure.