Tjernlund DCOP1 Constant Operating Pressure Draft Control 8504174 (Discontinued) - Manual (Page 5)

4
DCOP1 INSTALLATION
Do not mount the DCOP1 junction box on a heat source that exceeds 140 O F (60 O C). Examples of improper mounting surfaces
include vent pipe, top of heater casing or any place where radiant or convective heat would cause the junction box temperature to
exceed 140
O F (60 O C). The DCOP1 is intended for indoor installation only.
Using the key hole slots on the back of the DCOP1 junction box as a template, mark 4 holes on the mounting surface, drill pilot
holes if necessary, and secure junction box using provided screws.
ELECTRICAL WIRING
P1 & P2 PRE-CYCLE FAN PROVER STATUS CHECK
Pre-Cycle
Prover Status
Check Deactivated The Pre-Cycle Prover Status Check is deactivated from the factory. When activated, the UC1
Universal Control checks across P1 & P2 safety circuit (PSA-1 Fan Prover) to verify that the Fan
Prover switch is “Open” upon a call for heat and not stuck “Closed”. Natural draft or winds may be
sufficient to close the PSA-1 Fan Prover switch contacts prior to a call for heat. Keeping the Prover
Status Check activated may cause nuisance lockouts. Push dip switch 9 up or “ON” to deactivate.
9
ON
PRE-PURGE SETTINGS (SEE “PRE-PURGE” ON PAGE 3 PRIOR TO SETTING)
1 2 1 2 1 2 1 2
0 Seconds 5 Seconds 20 Seconds 35 Seconds
EXAMPLE OF DCOP1
& ROOFTOP INDUCER
INSTALLED WITH
MULTIPLE HEATERS
POST-PURGE SETTINGS (SEE “POST-PURGE” ON PAGE 3 PRIOR TO SETTING)
4 3 4 8 6 5 7 3 5 6 7 8 3 4 5 6 7 8 3 7 5 4 6 8
4 3 4 8 6 5 7 3 5 6 7 8 3 4 5 6 7 8
4 Minutes 8 Minutes 16 Minutes
1 Minute 0 Seconds 30 Seconds 2 Minutes
ON
ON
Pre-Purge Post-Purge
Pre-Cycle
Prover Status
Check Deactivated DIP SWITCH NUMBERING
1 ON 2 3 4 5 6 7 8 9