Tjernlund DCOP1 Constant Operating Pressure Draft Control 8504174 (Discontinued) - Manual (Page 3)

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Failure to install, maintain and/or operate the DCOP1 in accordance with manufacturer's instructions may result in conditions
which can produce bodily injury and property damage.
1. The installer must verify that the BTU/hr. input of the appliance(s) does not exceed the recommended input of the RT-Series
Inducer being controlled by the DCOP1. Refer to the RT-Series brochure or installation instructions for capacities.
2. Disconnect power supply from the DCOP1 and heating equipment when making wiring connections and servicing the DCOP1.
Failure to do so may result in personal injury and/or equipment damage. LED #6 (RED) on UC1 should be off with power removed.
3. All installation restrictions and instructions in the RT-Series Inducer installation instructions must be followed when using the
DCOP1.
4. Make certain power source is adequate for the DCOP1 and Inducer requirements. Do not add equipment to a circuit when the
total electrical load is unknown.
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.
A 15 Amp circuit breaker is recommended.
VETI
APPLIANCE CALL
VOLTAGE SELECTION
Place RED voltage jumper in
proper location based on
appliance call interlock volt-
age. SEE WARNING # 2.
IMPORTANT
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
INDUCER
MOTOR
RELAY
A B 1 2 3 4 L N
J1 J2 XL XN
P1 P2 C GND F
(1 9)
N M MTR
J1- J2 CALL
JUMPER
Used when the call signal is
used as the “proven” return
signal to the appliance. See
wiring section for details.
L / N - 115 VAC POWER
SUPPLY BLOCK
115 VAC / 50-60 Hz
Circuit protection provided by installer.
SEE WARNING # 3.
MTR & M / N LOAD TERMINALS
FROM INDUCER MOTOR RELAY
Used to drive Inducer Motor.
1 HP MAX LOAD across terminals MTR & M / N.
Connected to DCOP1 T6 & T9 Power Terminals.
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.
P1 - P2 SAFETY CIRCUIT
TERMINALS
1 mA @ 5VDC.
SEE WARNING # 1. C, GND, F AUXILIARY DEVICE
COMMUNICATION TERMINALS
2 mA @ 5VDC. For Tjernlund MAC1E or
MAC4E auxiliary devices. 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 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”.
INDUCER MOTOR RELAY
1 HP MAX LOAD from
terminals L to MTR & M.