1-Call, 2-Flow (2-Pump); Auxiliary Pump; 2-Call, 2-Flow (3-Pump) - heat-timer PLL Installation And Operation Manual

1-Call, 2-Flow (2-Pump)

• This mode is designed to rotate two system pumps in a hydronic
application. It is primarily used with Variable Frequency Drive
(VFD) pumps.
• The operation of this mode is similar to the 1-Call/1-Flow
Mode listed previously. The only exception is that each pump
will have its own flow input. That means that pump call must
be connected to Pump 1 call input terminals (C1) (20 and 21).
Pump 1 flow input must be connected to Flow 1 input terminals
(F1) (26 and 27) and Pump 2 flow input must be connected to
Flow 2 input terminals (F2) (28 and 29).

auxILIary PuMP

2-Call, 2-Flow (3-Pump)

• This configuration is typically used in a two-Boiler Feed
application. It uses an Auxiliary pump / Pump 3 to replace any
failing boiler feed pump. It does that by turning on a normally
closed solenoid valve to direct the flow from the failing pump to
the auxiliary pump.
• No rotation is available in this mode. The PLL control operates
a single pump per boiler.
• A maximum of two boiler pumps can be connected to a single
PLL.
• If any of the boiler pumps fail to provide proof-of flow in 30
seconds, the PLL will switch its operation to the Auxiliary pump
/ Pump 3 (P3).
• The valve outputs are used to operate solenoid valves to switch
the system flow from the failed pump to the Auxiliary pump /
Pump 3 (P3). Valve 1 output (V1) is turned on when Pump 1
fails and goes into alarm. Valve 2 output (V2) is turned on when
Pump 2 fails and goes into alarm. See "Valve Output Wiring" on
page 9..
• If a pump fails, the PLL will turn it off and will turn on its Alarm
output, its Valve output, and the Auxiliary pump / Pump 3 (P3)
output. In addition, it will blink its Alarm LED.
• If the second pump fails for over 30 seconds while the first
pump is in alarm, the PLL will turn off the 2nd pump and turn
on its relevant solenoid valve and Alarm LED. In this case, the
Auxiliary pump / Pump 3 (P3) replaces both primary pumps
until the situation is rectified and the Manual Reset button is
pressed.
PLL Installation and Operation Manual
PUMP 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
OUTPUT RATINGS: 2 RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
CAUTION:
Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
OUTPUT (SOURCING)
PWR PUMPS VALVES
P1 P2 P3 V1 V2 A1
L N G
L N L N N
L L N L N
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
VFD
Pump1
VFD
Pump2
PUMP 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
OUTPUT RATINGS: 2 RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
CAUTION:
Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
OUTPUT (SOURCING)
ALARMS
PUMPS VALVES
PWR
P1 P2 P3 V1 V2 A1 A2
L N G
L N L N L N L N L N
1 2 3
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Flow
Switch 2
Pump 2
ALARM 1
PLL
ALARM 2
ALARM 3
PUMP LEAD-LAG
COM
ALARM
POWER
RESET
DIP SWITCHES
On
DO NOT APPLY ANY VOLTAGE
1 2 3 4 5 6 7 8
TO INPUT TERMINALS
ALARMS
PUMP CALL FLOW INPUTS
A2 A3
C1 C2 C3 F1 F2 F3
20 21 22 23 24 25 26 27 28 29 30
Boiler or
Heating Source
ALARM 1
PLL
ALARM 2
ALARM 3 PUMP LEAD-LAG
COM
ALARM
POWER
RESET
DIP SWITCHES
On
DO NOT APPLY ANY VOLTAGE
1 2 3 4 5 6 7 8
TO INPUT TERMINALS
PUMP CALL FLOW INPUTS RS-485
A3
C1 C2 C3 F1 F2 F3
20 21 22 23 24 25 26 27 28 29 30 31
Boiler 2 Boiler 1
Flow
Switch 1
Solenoid 2 Solenoid 1
Pump 1
Aux Pump 3
RS-485
31
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