Tjernlund HS3,4,5 Series with UC1 Universal Control (Version X.06) 8504111 Rev C 07/05 - Manual (Page 12)

9
WIRING CONNECTIONS FROM UC1 TO FAN PROVER AND VENTER MOTOR
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.
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. 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 individual
millivolt heater. For further information consult factory or WHKE instructions.
SUPPLY
50/60 Hz
115 VAC
NEUTRAL
LINE / HOT
COMMON /
CALL SWITCH
USER-PROVIDED
INTERCEPTED
CALL FOR
APPROVED CALL
OR
HEAT
"DRY"
VENTER MOTOR
1 H.P. MAX @ 115 VAC
K2
MOTOR
COM
M
N
XN
NO K1
INTERLOCK
RELAY
J1 COM
J2
JUMPER
CALL
G
R
EEN
RED RED AMBER BL
UE
MAC1E OR MAC4E
PROVER
DEVICES. DO NOT
CONNECT POWER
WILL DAMAGE THE
OR F. DOING SO
TO P1, P2, C, GND
FOR TJERNLUND
GND
8
9
F
CONTROL.
AUXILIARY
34
2
67
5
C
1
P1
ON
P2
AS APPLIANCE INTERLOCK VOLTAGE.
RED JUMPER POSITION MUST BE THE SAME
DO NOT SUPPLY VOLTAGE
TO "A" OR "B".
IMPORTANT:
LED3 LED5 LED4 LED2 LED1 LED6
24 OR 115 VAC
APPROVED CALL BACK TO HEATER
INTERCEPTED CALL COMMON OR NEUTRAL
24 OR 115 VAC INTERCEPTED CALL FOR HEAT
5 VDC BOARD-GENERATED POWER
DO NOT SUPPLY POWER!
115 VAC
LEGEND:
TERMINAL 2:
TERMINAL 1:
TERMINAL 4:
FIGURE 1303958-1C
LE
D PO
WER RED
DRY 24V 115V
(1 - 2)
PRE-PURGE SETTINGS
(3 - 8)
(9)
OPEN PROVER OPTION
POST-PURGE SETTINGS
RELAY MTR
NO
INC.
9183006
T
JE
RNLUND
P
R
O
DUCT
S
,
R
XL
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 #6 (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.