Tjernlund UCRT Rooftop Inducer Universal Control (Version X.06) 8504162 Rev 01/10 - Manual (Page 8)

7
UC1 UNIVERSAL CONTROL CONNECTED WITH A SINGLE ZONE 24 VAC THERMOSTAT
XN
R
U
N
IVER
SAL C
O
N
T
R
O
LLER
THERMOSTAT
G G
INTERNAL CONTROL
OF FURNACE
W
C
Y
R
R
Y
AS APPLIANCE INTERLOCK VOLTAGE.
RED JUMPER POSITION MUST BE THE SAME
XL
J1
J2
W
DRY 115V 24V
IMPORTANT:
D/N 9183046-5
115 VAC
24 VAC
LEGEND:
CALL
JUMPER
50/60 Hz
SUPPLY
115 VAC
SPADE TERMINAL IN ELECTRICAL BOX.
GROUND
CRIMP GROUND WIRE TO GROUNDING
IMPORTANT:
1. Connect W from t-stat to #1 on terminal block of UC1.
2. Connect #2 on UC1 terminal block to C on internal control terminal strip of furnace/boiler.
3. Connect #4 on UC1 terminal block to W on internal control terminal strip of furnace/boiler.
4. Make sure RED voltage jumper on UC1 is on 24V.
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 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.