Tjernlund HS3,4,5 Series with UC1 Universal Control (Version X.02) 8504111 Rev 09/02 User Manual
Page 10
9
WIRING CONNECTIONS FROM UC1 UNIVERSAL CONTROL AND MOTOR MADE IN FAN PROVER JUNCTION BOX
The UC1 has a 2 foot whip that contains a ground lead and the leads to power the Venter motor and connect to the Fan Prover. If it
is desirable to mount the UC1 more than 2 feet from the Fan Proving Switch an additional electrical junction box and appropriate
length of conduit will be necessary. Any added wire should be 14 gage and a pig tail should be added to each ground wire connec-
tion so that each electrical junction box is grounded. See diagram on page 8 for a typical UC1, Fan Prover and Venter installation.
WIIRING CONNECTIONS FROM UC1 TO FAN PROVER AND VENTER MOTOR
MODELS HS4 & HS5 (ONLY)
Connect Black and White motor ring terminal leads to ring terminal studs on motor. Connect Ground Lead to ground screw on motor.
IMPORTANT: Motor should be factory wired for proper rotation. As viewed from the opposite end of the shaft (rear of motor), the
motor should rotate clockwise. See motor nameplate for proper rotation.
ALL MODELS (See diagram on page 8 for typical installation)
1. Connect ground wire from UC1 whip and Venter motor ground wire to ground screw in Fan Prover junction box.
2. Connect Black and White motor leads from UC1 whip to Venter motor leads in Fan Prover junction box.
3. Connect Blue and Yellow leads from UC1 whip to Fan Prover switch terminals. Leads are not polarity sensitive.
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.
To interlock a millivolt water heater and a 24/115 VAC furnace or boiler, add the WHKE and MAC1E.
MILLIVOLT 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.
IMPORTANT:
RED JUMPER POSITION MUST BE THE SAME
AS APPLIANCE INTERLOCK VOLTAGE.
CALL
RELAY
INTERLOCK
COMMON
NEUTRAL
PRODUCTS,
INC.
MOTOR
1 H.P. MAX @ 115 VAC
SUPPLY
115 VAC
50/60 Hz
R
TJERNLUND
9183006
NO
MTR
M
MOTOR
RELAY
N
COM
NO
115 VAC
24 VAC
D/N 1303958-1
DO NOT SUPPLY VOLTAGE
TO "A" OR "B".
DO NOT SUPPLY POWER!
5 VDC BOARD-GENERATED POWER
HOT
24 VAC
USER-PROVIDED
CALL SWITCH
LINE
OR
"DRY"
OR
115V
J2
COM
24V
DRY
LEGEND:
115 VAC
5
POST-PURGE SETTINGS
FOR TJERNLUND
TO P1, P2, C, GND
AUXILIARY
OR F. DOING SO
WILL DAMAGE THE
CONNECT POWER
OPEN PROVER OPTION
(9)
(3 - 8)
9
7
8
6
CONTROL.
DEVICES. DO NOT
F
GND
ON
LED1
PRE-PURGE SETTINGS
LED5 LED4
LED2
LED3
(1 - 2)
2
4
3
1
C
P1
P2
PROVER
J1
XL
XN
115 OR 24 VAC FROM CALL JUMPER
OR USER-PROVIDED VOLTAGE
FROM TERMINAL 3 TO 4 WITH CALL
JUMPER REMOVED
K2
K1
APPROVED
MAC1E OR MAC4E
JUMPER
RED
RED
GREEN
GREEN
AMBER
WARNING: Disconnect power supply from the UC1 and heating equipment when making wiring connections and servicing the
Venter. Failure to do so may result in personal injury and/or equipment damage. LED #5 (RED) should be off with
power removed.
UC1 UNIVERSAL CONTROL WIRING SCHEMATIC
The Ground lead, Venter motor and Fan Prover leads are factory connected to the UC1 circuit board. Venter Ground, motor and Fan
Prover wiring connections are made at the free end of the 2 foot whip. Motor should be factory wired for proper rotation. As viewed
from the opposite end of the shaft (rear of motor), the motor should rotate clockwise. See motor nameplate for proper rotation.