Tjernlund UCRT Rooftop Inducer Universal Control (Version X.06) 8504162 Rev 01/10 User Manual

Page 9

UC1 UNIVERSAL CONTROL CONNECTED TO A GAS OR OIL BURNER WITH AN AQUASTAT

SA
L CO

NT
RO

LINE VOLTAGE OIL BURNER

PRIMARY CONTROL, BURNER

115V

DRY

24V

AQUASTAT

D/N 9183046-7

115 VAC

LEGEND:

CALL
JUMPER

RELAY OR GAS VALVE

50/60 Hz

SUPPLY
115 VAC

RED JUMPER POSITION MUST BE THE SAME

IMPORTANT:

AS APPLIANCE INTERLOCK VOLTAGE.

SPADE TERMINAL IN ELECTRICAL BOX.

GROUND

CRIMP GROUND WIRE TO GROUNDING

IMPORTANT:

1. Disconnect B1 from L1 of oil burner primary control, burner relay or hot of gas valve and reconnect to #1 on UC1 terminal block.
2. Connect #2 on UC1 terminal block to B2 or N.
3. Connect #4 on UC1 terminal block to the L1 on line voltage oil burner primary control, burner relay or gas valve.
4. Make sure RED voltage jumper on UC1 is on 115V.
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.

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 AND WHKE INTERLOCK KIT

CONNECTED WITH A MILLIVOLT APPLIANCE

UNI

NT
RO

LLE

D/N 9183046-9

CALL

AS APPLIANCE INTERLOCK VOLTAGE.

RED JUMPER POSITION MUST BE THE SAME

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-

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