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UC1 UNIVERSAL CONTROL AND WHKE INTERLOCK KIT 

CONNECTED WITH A MILLIVOLT APPLIANCE 

XN

R

UNI

V

E

R

S

A

L

 CO

NT
RO

LLE

R

D/N 9183046-9

CALL

AS APPLIANCE INTERLOCK VOLTAGE.

RED JUMPER POSITION MUST BE THE SAME

XL

J1

J2

DRY

115V

24V

IMPORTANT:

JUMPER

GENERATED

5 VDC

LEGEND:

115 VAC

WHKE GAS

SAFETY CIRCUIT ACROSS P1 & P2 OF UC1 IS NOT UTILIZED

WITH HEATING EQUIPMENT AS SHOWN.

IN THIS APPLICATION.  SPILL SWITCH MUST BE INTERLOCKED

MILLIVOLT

PRESSURE

SWITCH

JUNCTION ADAPTER

THERMOCOUPLE

950-0470 (JA1)

LINEAR LIMIT

SPILL SWITCH

GAS

VALVE

30 MILLIVOLT WATER HEATERS REQUIRE USE OF THE

(ECO) OF WATER HEATER.  LINEAR LIMIT SPILL SWITCH,

ON 750 MILLIVOLT (POWER PILE) WATER HEATERS WIRE
LINEAR LIMIT SPILL SWITCH IN SERIES WITH HIGH LIMIT

950-0470 THERMOCOUPLE JUNCTION ADAPTER.

950-0470 JUNCTION ADAPTER AND GAS PRESSURE
SWITCH ARE INCLUDED WITH WHKE KIT.

DO NOT
SUPPLY

POWER.

POWER!

BOARD-

50/60 Hz

SUPPLY
115 VAC

ELECTRICAL BOX.

GROUND

CRIMP GROUND WIRE TO GROUNDING SPADE TERMINAL IN 

IMPORTANT:

Each millivolt appliance interlocked with the UC1 must have its own WHKE kit installed.  The WHKE Gas Pressure Switch actuates
the Inducer through the A - B Dry contacts.  The Linear Limit switch disables the heater in the event of a venting malfunction.

IMPORTANT

: Each millivolt appliance interlocked with the UC1 must have its own Linear Limit spill switch.

1. Wire WHKE Gas Pressure Switch in series with A and B terminal on UC1.  Do not supply voltage to A and B terminals.
2. Wire WHKE Linear Limit in series with thermocouple junction adapter or high limit ECO of water heater. 
3. Make sure RED voltage jumper on UC1 is in the DRY position.
4. Connect 115 VAC supply voltage to L & N terminals on UC1. Connect the 2 green ground wires in UCRT to supply ground. 

Important: Installer must supply overload and disconnect protection.

5. If not previously completed, connect Black, White and Red leads from UCRT to like colors in Rooftop Inducer whip 4x4 weather-

proof junction box. Connect the Green/Yellow ground lead in UCRT to the ground screw in the Rooftop Inducer whip 4x4 
weatherproof box. Connect Blue and Yellow leads from UCRT to PSA-1 Fan Prover switch. Prover Leads are not polarity sensitive.

If using 

only

venting millivolt appliances the PSA-1 Fan Proving Switch is not necessary, see WHKE instructions for details.

UC1 UNIVERSAL CONTROL CONNECTED WITH A 24 OR 115 VAC STANDING PILOT

115V

24V

DRY

OF FURNACE/BOILER

INTERNAL CONTROLS

24V OR 115V GAS VALVE

HOT

COM

B2

COM
TR

Aquastat

T-stat

TH

HOT

B1

XL

U

N

IVER

SAL C

O

N

T

R

O

LLER

XN

J1

J2

D/N 9183046-1

24 OR 115 VAC

LEGEND:

CALL
JUMPER

115 VAC

50/60 Hz

SUPPLY
115 VAC

SPADE TERMINAL IN ELECTRICAL BOX.

GROUND

CRIMP GROUND WIRE TO GROUNDING 

IMPORTANT:

RED JUMPER POSITION MUST BE THE SAME

AS APPLIANCE INTERLOCK VOLTAGE.

IMPORTANT:

1. Remove the wire on TH or HOT of gas valve and connect it on #1 on UC1 terminal block. 
2. Connect #2 on UC1 terminal block to TR or Common. 
3. Connect #4 on UC1 terminal block to TH or HOT on gas valve.
4. Make sure RED voltage jumper on UC1 is on 24V or 115V depending on control voltage.
5. Connect 115 VAC supply voltage to L & N terminals on UC1. Connect the 2 green ground wires in UCRT to supply ground. 

Important: Installer must supply overload and disconnect protection.

6. If not previously completed, connect Black, White and Red leads from UCRT to like colors in Rooftop Inducer whip 4x4 weather-

proof junction box. Connect the Green/Yellow ground lead in UCRT to the ground screw in the Rooftop Inducer whip 4x4 
weatherproof box. Connect Blue and Yellow leads from UCRT to PSA-1 Fan Prover switch. Prover Leads are not polarity sensitive.

Summary of Contents for UCRT

Page 1: ...ESE INSTRUCTIONS MAY RESULT IN IMPROPER INSTALLATION ADJUST MENT SERVICE OR MAINTENANCE POSSIBLY RESULTING IN FIRE ELECTRI CAL SHOCK CARBON MONOXIDE POISONING EXPLOSION PERSONAL INJURY OR PROPERTY DAM...

Page 2: ...ight carrier and your distributor immediately and file a concealed damage claim INSTALLATION RESTRICTIONS 1 The Pre Cycle Prover Status Check is deactivated from the factory on the UCRT Natural chimne...

Page 3: ...ED POWER LED DRY 24 V 115 V APPLIANCE INTERLOCK RELAY INDUCER MOTOR RELAY A B 1 2 3 4 L N J1 J2 XL XN P1 P2 C GND F 1 9 N M MTR J1 J2 CALL JUMPER Used when the call signal is used as the proven return...

Page 4: ...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 PROVE...

Page 5: ...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 RE...

Page 6: ...ed in these instructions call Tjernlund s Customer Service Department toll free at 1 800 255 4208 for assistance IMPORTANT If the call for heat interlock signal or 115 VAC power is removed the UC1 boa...

Page 7: ...heaters To interlock a millivolt water heater and a 24 115 VAC furnace or boiler add the WHKE and MAC1E MILLIVOLT HEATER INSTALLATIONS Each millivolt appliance interlocked with the UC1 must have its o...

Page 8: ...arity sensitive NOTE If burner safety control goes out on lockout the Inducer will continue to run as long as a call for heat is present UC1 UNIVERSAL CONTROL CONNECTED WITH A 24 VAC ELECTRONIC IGNITI...

Page 9: ...und wires in UCRT to supply ground Important Installer must supply overload and disconnect protection 5 If not previously completed connect Black White and Red leads from UCRT to like colors in Roofto...

Page 10: ...ol goes out on lockout the Inducer will continue to run as long as a call for heat is present UC1 UNIVERSAL CONTROL CONNECTED TO A HONEYWELL R7184 SERIES OR EQUIVALENT PRIMARY CONTROL WITH A LINE VOLT...

Page 11: ...lue and Yellow leads from UCRT to PSA 1 Fan Prover switch Prover Leads are not polarity sensitive NOTE If burner safety control goes out on lockout the Inducer will continue to run as long as a call f...

Page 12: ...to the ground screw in the Rooftop Inducer whip 4x4 weatherproof box Connect Blue and Yellow leads from UCRT to PSA 1 Fan Prover switch Prover Leads are not polarity sensitive UC1 UNIVERSAL CONTROL C...

Page 13: ...that a slight positive draft neutral to 0 01 W C or 2 5 Pa is measured at the appliance draft sampling location Flue gases should just start to spill from the draft hood draft diverter or barometric d...

Page 14: ...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...

Page 15: ...4 Red will be reset if the call for heat interlock signal or 115 VAC power is removed If the fan prover makes on start up but breaks for more than 10 seconds during the burner cycle LED 4 will flash...

Page 16: ...ined return it to your Tjernlund distributor for replacement Please include UCRT date code component was taken from The date code is located on the Electrical Box coverplate If the date code is older...

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