SS2 WITH INTEGRAL UC1 UNIVERSAL CONTROL BOARD FEATURES
# 1.
Power supplied by board. Do not supply power to this area or control damage may result.
# 2.
Do not supply power to the appliance interlock block with the call selector in the “DRY” position.
Control damage may result if power is supplied.
# 3.
Circuit protection must be provided by the installer. 16 Amps is the maximum current allowed for this device at terminal L.
V
A 15 Amp circuit breaker is recommended.
V
ETI
LED STATUS & FAULT INDICATORS
LED INDICATOR LIGHTS
LED #1 (Amber)
Appliance call for heat.
LED #2 (Blue)
Safety circuit through P1 & P2 (SS2 Limit & Fan Prover). Indicates SS2 Limit & Prover are closed during run cycle.
Burner circuit is energized with Interlock Relay contact closure from terminal 3 to 4.
LED #3 (Green)
Power switched to SS2 motor & Cooling Fan from L to MTR & M.
LED #4 (Red)
Status / Fault indicator.
LED #5 (Red)
Used as a status indicator.
LED #6 (Red)
115 VAC power supplied to board.
LED STATUS INDICATORS
LED #4 & #5 (Red) Flashing Alternately = Venter in Pre-purge. (Pre-Purge options 0, 5, 20, 35 seconds)
LED #4 & #5 (Red) Flashing in Unison = Venter in Post-Purge. (Post-Purge options 0, 30 seconds or 1, 2, 4, 8, 16 minutes)
LED #4 Flashing Continuously*
= Fan Prover opened for more than 10 seconds during burner cycle.
(Venter will run for 10 minutes, attempting to make Fan Prover)
LED #5 (Red) Flashing Intermittently
= With no call for heat, flashes 3 seconds on / 3 seconds off if microcontroller is working properly.
LED 1 (AMBER)
LED 2 (BLUE)
LED 3 (GREEN)
LED 4 (RED)
LED 5 (RED)
LED 6 (RED) POWER LED
DRY
24 V
115 V
APPLIANCE
INTERLOCK
RELAY
VENTER
MOTOR
RELAY
A B 1 2 3 4 L N
J1 J2 XL XN
P1 P2 C GND F
(1 9)
N M MTR
4
C, GND, F AUXILIARY DEVICE
COMMUNICATION TERMINALS
2 mA @ 5VDC. For Tjernlund MAC1E or
MAC4E auxiliary devices.
SEE WARNING # 1
.
P1 - P2 SAFETY CIRCUIT
TERMINALS
1 mA @ 5VDC.
SEE WARNING # 1
.
DIP SWITCH SETTINGS
Pre-Purge (1-2)
Post-Purge (3-8)
Prover status check (9)
See “Pre / Post Purge &
Prover Status Check Dip
Switch Settings”.
LED STATUS LIGHTS
See “LED Status & Fault
Indicator Section” for details.
APPLIANCE CALL
VOLTAGE SELECTION
Place
RED
voltage jumper in
proper location based on
appliance call interlock volt-
age.
SEE WARNING # 2.
IMPORTANT
J1- J2 CALL
JUMPER
Used when the call signal is
used as the “proven” return
signal to the appliance. See
wiring section for details.
APPLIANCE INTERLOCK
TERMINAL BLOCK (A-B, 1-4)
A - B
- Dry Contact call. 3 mA @ 5VDC.
SEE WARNING # 1.
1
- 24 or 115 VAC intercepted call.
IMPORTANT
: RED voltage jumper must
match intercepted call voltage.
2
- 24V common or 115V Neutral.
3
- Common terminal to appliance relay con-
tacts.
IMPORTANT:
J1-J2 jumper routes
call voltage at terminal 1 to 3. Remove
J1-J2 jumper if a different voltage source is
provided to terminal 3.
4
- Normally open terminal of appliance relay.
Will be energized from terminal 3 if safety
circuit is “proven”.
L / N - 115 VAC POWER
SUPPLY BLOCK
115 VAC / 50-60 Hz
Circuit protection provided by installer.
SEE WARNING # 3.
MTR & M LOAD TERMINALS
FROM VENTER MOTOR RELAY
Used to drive SS2 Motor & Cooling fan.
1 HP MAX LOAD across terminals MTR & M / N.
XL / XN AUXILIARY DEVICE
POWER TERMINALS
115 VAC - Maximum of 0.15 Amps.
Only connect to Tjernlund auxiliary devices.
SEE WARNING # 1.
APPLIANCE INTERLOCK
RELAY
1 HP MAX LOAD across
terminals 3 & 4.
VENTER MOTOR RELAY
1 HP MAX LOAD from
terminals L to MTR & M.
