Tjernlund UC1 Universal Control (Version X.06) 8504107 Rev D 07/05 - Manual (Page 9)

6
UC1 UNIVERSAL CONTROL CONNECTED WITH A 24 VAC ELECTRONIC IGNITION MODULE
XN
R
UNIV
E
RS
A
L CO
NTRO
LLE
R
D/N 9183046-8
115 VAC
24 VAC
LEGEND:
HONEYWELL IGNITION
CONTROL
MV
MV
PV
CALL
AS APPLIANCE INTERLOCK VOLTAGE.
RED JUMPER POSITION MUST BE THE SAME
XL
J1
J2
DRY 115V 24V
PV
MV / PV (2)
MV (1)
PV (3)
BNR GND (4)
24V GND (5)
24V (6)
(7)
(8)
SPARK (9)
OR
PI
YE
GR
YE
WH
OR
YE
WH
OR
GR
GAS VALVE
JUMPER
50/60 Hz
SUPPLY
115 VAC
SPADE TERMINAL IN ELECTRICAL BOX.
GROUND
CRIMP GROUND WIRE TO GROUNDING
IMPORTANT:
1. Remove the wire on MV at gas valve and connect it on #1 on UC1 terminal block.
2. Connect #2 on UC1 terminal block to MV/PV.
3. Connect #4 on UC1 terminal block to MV on gas valve.
4. Make sure RED voltage jumper on UC1 is on 24V.
5. Connect 115 VAC supply voltage to L & N terminals on UC1. Crimp Ground wire to grounding spade terminal in UC1.
Important: Installer must supply overload and disconnect protection.
6. If not previously completed, connect ground from UC1 whip to Venter ground. Connect Black and White leads from UC1 whip
to Venter motor leads. Connect Blue and Yellow leads from UC1 whip to Fan Prover switch. Prover Leads are not polarity sensitive.
VENTER GROUND, MOTOR AND PROVER SAFETY CIRCUIT CONNECTIONS
VENTER PROVER CONNECTIONS
Blue and Yellow leads from UC1 whip (P1 and P2) safety circuit must be connected to a Fan Prover switch. Leads are not polarity
sensitive. If using a Draft Inducer and venting only millivolt appliances, the PS1505 Fan Prover is not needed. See WHKE
instructions or consult factory.
1 UNIVERSAL
VENTER MOTOR CONNECTIONS
Connect Black and White motor leads from UC1 whip to Venter motor leads. Venter motor must not exceed 1 h.p. Make sure
venter motor is wired for proper rotation. Consult motor nameplate for rotation.
VENTER GROUND CONNECTION
Connect Green ground lead from UC1 whip to Fan Prover ground screw along with ground from Venter motor. If using a Draft
Inducer and venting only millivolt appliances where the PS1505 Fan Prover is not needed, connect ground to Venter motor ground.
MULTIPLE APPLIANCE INTERLOCKS
To interlock with one additional 24/115 VAC heater add the MAC1E. It is a stripped down auxiliary board version of the UC1 and
is powered by and communicates with the UC1 through a factory wired whip.
To interlock more than two 24/115 VAC heaters, add the MAC4E for a total of up to 5 heaters. It is powered by and communicates
with the UC1 through a factory wired whip. Consult factory for installations with more than 5 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 own WHKE kit installed. The WHKE Gas Pressure Switch actuates
the Venter 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.
MULTIPLE MILLIVOLT HEATER INSTALLATIONS
Multiple millivolt heaters can be installed by using the A-B dry contact terminals of the UC1, MAC1E or MAC4E. Wire each WHKE
gas pressure switch in parallel across A-B terminals of UC1, MAC1E or MAC4E. Wire Linear Limit safety switch into each individ-
ual millivolt heater. For further information consult factory or WHKE instructions.
UC1 BURNER INTERLOCK WIRING DIAGRAMS