heat-timer PLL User manual

Installation and Operation Manual
WARNING
This Heat-Timer control is strictly an operating control; it should
never be used as a primary limit or safety control. All equipment
must have its own certified limit and safety controls required by local
codes. The installer must verify proper operation and correct any
safety problems prior to the installation of this Heat-Timer control.
HT# 059296-00A
Provides Pump Rotation,
Auxiliary Pump Activation, and
Pump Failure Alarm Control Pump-Lead-Lag
PLL

HT# 059296-00A
2PLL Installation and Operation Manual
CONTENTS
PLL Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Alarming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Alarming on No-Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Ending the Alarm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Rotation options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1-Call / 1-Flow (2-Pump Mode) or (3-Pump Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1-Call, 2-Flow (2-Pump) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Auxiliary Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2-Call, 2-Flow (3-Pump) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Pump Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3-Call, 3-Flow (3-Pump) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Pump exercise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Installation Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Mounting The Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Wiring the Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Input Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Pump Call Input Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Flow Input Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Output Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Pump Output Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Valve Output Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Visual/Audio Alarm Output Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Web or EMS Alarm Output Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Dip Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Wiring and Piping Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2-Pump 1-Call 1-Flow Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2-Pump 1-Call 1-Flow Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2-Pump 1-Call 2-Flow Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2-Pump 1-Call 2-Flow Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3-Pump 1-Call 1-Flow Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3-Pump 1-Call 1-Flow Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3-Pump 2-Call 2-Flow Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3-Pump 2-Call 2-Flow Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3-Pump 3-Call 3-Flow Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3-Pump 3-Call 3-Flow Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Specication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

HT# 059296-00A
PLL Installation and Operation Manual 3
PLL LAYOUT
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
LED indicates the
associated relay status. Alarm Reset Button
120 VAC
Power
Pump and Valve output relays
source 120 VAC power.
Pump Flow Inputs
(Dry-Contact)
Pump Call Inputs
(Dry-Contact)
Alarm output relays
do not source power.

HT# 059296-00A
4PLL Installation and Operation Manual
OVERVIEW
The PLL is a Lead-Lag Pump control. It is designed to operate in different modes to satisfy multiple pumping applications. To
change the operating mode, set the dip switches. See "Dip Switches" on page 10. It can provide pump lead-lag rotation for two or
three pump systems. With its built-in alarm outputs, the PLL can trigger an alarm whenever a pump fails to provide proof-of-ow
within 30 seconds. It can also be used to provide pump ow check and run-on delay.
The PLL can operate up to 3 pumps. It outputs source 120 VAC power to its pump and solenoid valve outputs. However, alarm
outputs require an external power source.
ALARMING
• The PLL is equipped with an alarm output for each of the three available pump outputs.
• For local indication, it also has an LED for each of the alarm outputs.
Alarming on No-Flow
• If a pump fails to provide proof-of-ow for 30 seconds, by shorting the Flow input terminals, the PLL will turn that pump’s alarm
output on and blink its alarm LED.
• If the mode selected offers a rotation option, then the PLL shall turn on the next pump output and its LED.
Ending the Alarm
• If any of the pumps is in alarm, its alarm output will remain on until the Alarm Reset button is pressed. This will cause the Alarm
output to turn off.
ROTATION OPTIONS
• The PLL offers lead-lag pump rotation in many of its modes.
• When an operating mode has rotation options, it will have
multiple time-rotation options and an alternating rotation option.
• You can change the time interval of the time-rotation using
the appropriate dip switches for the mode selected. See "Dip
Switches" on page 10.
1-Call / 1-Flow (2-Pump Mode) or (3-Pump
Mode)
• This mode is designed to rotate two system pumps in a hydronic
application.
• The PLL rotates the pumps based on either timed rotation or
alternating demand (per call). The rotation options are selected
via dip switches.
• The pump call must be connected to Pump 1 input terminals
(C1) (20 and 21). In addition, the ow input must be connected
to Flow 1 input terminals (F1) (26 and 27).
• Alternating demand activates a different pump each time a pump
call is initiated.
• Timed rotation has two options, 1 day, and 7 days rotation.
• When rotation of the lead pump is to take place during a timed
rotation, the operation of both pumps, old lead pump and new
lead pump, will overlap for a few seconds to eliminate a no-ow
period prevent boiler short-cycling.
• In these modes, if a pump fails to provide proof-of-ow for a
period of 30 seconds, the PLL will turn it off. Also, it will turn
on its alarm and turn on the next lead pump.
Flow
Switch
Pump2
Pump1
Boiler or
Heating Source
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2 RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING)
3
G

HT# 059296-00A
PLL Installation and Operation Manual 5
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 ow input. That means that pump call must
be connected to Pump 1 call input terminals (C1) (20 and 21).
Pump 1 ow input must be connected to Flow 1 input terminals
(F1) (26 and 27) and Pump 2 ow input must be connected to
Flow 2 input terminals (F2) (28 and 29).
1 2 3 4 5 6 7 8
On
VFD
Pump2
VFD
Pump1
Boiler or
Heating Source
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2 RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING)
3
G
AUXILIARY PUMP
2-Call, 2-Flow (3-Pump)
• This conguration 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 ow 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 ow 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 ow 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 rst
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 rectied and the Manual Reset button is
pressed.
Boiler 2
Flow
Switch 2
Pump 2
Boiler 1
Flow
Switch 1
Pump 1
Aux Pump 3
Solenoid 1Solenoid 2
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2 RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING)
3
G

HT# 059296-00A
6PLL Installation and Operation Manual
PUMP DELAY
3-Call, 3-Flow (3-Pump)
• This conguration is typically used in one, two, or three boiler
pump applications to offer pump delay and alarming. The PLL
control operates a single pump per boiler.
• Each of the pump calls will use a different pump call input (C1,
C2, and C3).
• Also, each of the pump ows will use the respective pump ow
input (F1, F2, and F3).
• No rotation is available in this mode.
• If a pump failed to provide proof-of-ow for over 30 seconds,
the PLL will turn that pump output off and turn on its alarm.
Boiler 1 Boiler 2
Flow
Switch 1
Pump 1
Flow
Switch 3
Flow
Switch 2
Pump 3Pump 2
Boiler 3
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2 RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING)
3
G
PUMP EXERCISE
• This option is recommended for all pumps as it helps protect the pumps from locking due to sediment deposit and rust in the
system. It proves very benecial to wet rotor pumps as it helps lubricate their seals.
• When this feature is enabled, The PLL exercises any pump that did not run for a week. The exercise period is 10 seconds.
INSTALLATION STEPS
Follow these steps to make sure that all aspects of the system installation are done:
1. Mount the PLL control. See "Mounting The Enclosure" on page 7.
2. Wire the PLL control to the power, the pumps, ow inputs, valves, and the alarms. See "Wiring" on page 8.
3. Set the dip switches to match your application. See "Dip Switches" on page 10..
4. Power the control.

HT# 059296-00A
PLL Installation and Operation Manual 7
INSTALLATION
MOUNTING THE ENCLOSURE
• Select a location near the equipment to be controlled.
• The surface should be at and sufciently wide and strong to hold the PLL.
• Keep the control away from extreme heat, cold, or humidity. Ambient operating
temperature is from 20 to 120°F.
• Remove the Enclosure Wiring Cover from the control enclosure by removing the
two bottom screws.
• Remove the Enclosure Display Module by removing its Mounting Screws.
• Screw the Enclosure Base to the surface through the upper and lower mounting
holes on the back of the enclosure.
• Replace the Enclosure Display Module and its Mounting Screws.
• Do not replace the Enclosure Wiring Cover until all wiring is done.
• When purchasing a padlock for the enclosure, the maximum shank diameter should
not exceed ¼”
Warning
The PLL is an operating control
only not a safety control. It is
the responsibility of the installer
to verify that all the safety and
limits required by code are
working properly before and
after the PLL is installed.
Enclosure Display Module
Enclosure Wiring Cover Enclosure Base
Hole for optional lock
(not supplied)
Mounting Holes
Display Mounting Screws
Wiring Cover
Mounting Screws

HT# 059296-00A
8PLL Installation and Operation Manual
WIRING
Warning
Class 1 voltage wiring (low voltage) must use a different knockout
and conduit from any Class 2 voltage wiring (high voltage).
WIRING THE POWER
• Bring the power wires through one of the bottom knockouts of the enclosure.
• Attach 120V 60 Hz wires to their respective Line, Neutral, and Ground terminals.
• Heat-Timer recommends the installation of a Surge Suppressor and a Power Switch
before the Power Line connection for safety and ease of service.
120 VAC
Earth
Ground
L
N
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
INPUT WIRING
Warning
All of the PLL inputs are dry-contact only. DO NOT APPLY POWER TO
ANY INPUT as this may damage the control and void its warranty.
Pump Call Input Wiring
Pump Call (C1 Terminal 20 and 21), (C2 Terminal 22 and 23), (C3 Terminal
24 and 25)
• Depending on the mode selected, the PLL may require the use of one, two, or three
Pump Call inputs. See "Dip Switches" on page 10.
• Wire each Pump input into the corresponding input terminals of the PLL. See
"Overview" on page 4.
Pump 1
Call
Input
Pump 2
Call
Input
Pump 3
Call
Input
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25
29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3
F1 F2 F3
PUMP CALL
FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Flow 3
Input
Flow 2
Input
Flow 1
Input
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25
29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3
F1 F2 F3
PUMP CALL
FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Flow Input Wiring
Pump Flow (F1 Terminal 26 and 27), (F2 Terminal 28 and 29), (F3 Terminal
30 and 31)
• Depending on the mode selected, the PLL may require the use of one, two, or three
ow inputs. See "Overview" on page 4.
• Wire each Flow input to the corresponding input terminals of the PLL.
• If a pump fails to provide a ow signal for over 30 seconds, by shorting the proper
ow input terminal, the PLL will turn off the failing pump’s output and LED and turn
on the its pump alarm output and LED.
• If the mode selected rotates the lead pump or offers an auxiliary pump operation,
the failed pump alarm will cause the lead pump to go the next available pump or the
auxiliary pump.
ALERT
If no ow switch is used, use a jumper on the ow input terminals. (Heat-Timer
recommends using a ow switch for better system response and operation.
OUTPUT WIRING
• The PLL provides 120 VAC 60Hz power to the pump and solenoid valve output
relays. Each relay can power up to 1/4 HP pump (120 VAC 60 Hz) or 80 VA Solenoid
Valves (120 VAC 60Hz).
• The PLL does not provide power to the alarm output relays. A separate power source
must supply the power to the alarm. In this case, the alarm relays act as a power
switches.
Warning
Each of the Pump and Solenoid
valve outputs source 120 VAC.
If the pump used require more
than ¼ HP or if the solenoid
used require more than 80 VA of
120 VAC, use a relay or a starter
to prevent PLL damage.

HT# 059296-00A
PLL Installation and Operation Manual 9
Pump Output Wiring
• Before wiring the pumps, decide on the function of each of the pumps based on the
mode selected.
• Each of the PLL pump outputs sources power to operate a pump up to ¼ HP (120
VAC, 60Hz).
• If the pump requires more power than what the PLL can output, use a pump starter or
an external higher output power relay.
• Wire the Pump output terminals to the pumps or pump starters.
Pump 2
¼HP
Pump 3
¼HP
80 VA
max.
80 VA
max.
Pump 1
¼HP
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8
9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Pump 2
¼HP
Pump 3
¼HP
80 VA
max.
80 VA
max.
Pump 1
¼HP
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Valve Output Wiring
• Valve outputs function only in the 2-Call 2-Flow 3-Pump Mode. See "2-Call, 2-Flow
(3-Pump)" on page 5.
• The valve outputs are used to operate normally closed (N. C.) solenoid valves to
switch the system ow from the failed pump to the Auxiliary pump (Pump 3). 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.
• The valve outputs source 120 VAC 60Hz power. Each output can operate an 80 VA
solenoid valve.
• If the valve requires more power than what the PLL can output, use an external higher
output power relay.
• Connect Valve 1 (V1) and Valve 2 (V2) outputs to their respective solenoid valves.
Solenoid
Valve 2
Solenoid
Valve 1
1 2 3 4 5 6 7 8
On
Solenoid
Valve 2
Solenoid
Valve 1
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16
17 18 19
LN
RS-485
VALVES
A1
A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4
5
P1
L
NLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Visual/Audio Alarm Output Wiring
• The PLL has 3 alarm outputs, one for each of the pump outputs. An Alarm output is
triggered when its pump fails to provide proof-of-ow in 30 seconds.
• The Alarm outputs do not source any power. A separate power source must be
supplied. Each set of contacts is capable of switching 1A Inductive, 6A Resistive at
120 VAC.
• Connect the Alarm outputs to an alarm. The Heat-Timer Vis-U-Larm
(HT #925011-00) is a visual-audio alarm that is designed to work with the PLL. It
has both a Red Alarm light in addition to a sound alarm.
• All Alarm outputs can be wired to use the same alarm unit as per the graph.
Web or EMS Alarm Output Wiring
• The Alarm outputs can be used to trigger Internet alarms using a Heat-Timer Internet-
ready Platinum control. It can also be used to trigger a BMS alarm.
• Connect the Alarm output to any of the Aux Temp or Mini-MIG inputs on an Internet-
ready Heat-Timer Platinum heating control.
• Web alarms allows the user of a Platinum heating control to receive the alarm
notication on the web, by E-Mail, or a cellular phone text message. See Internet
Control Manuals.
• An BMS alarm output allows an BMS system to receive an alarm notication.
120
VAC
Alarm
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11
12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1
V2
LN
LN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G

HT# 059296-00A
10 PLL Installation and Operation Manual
DIP SWITCHES
The PLL control is designed to operate pumps in multiple modes. Each mode can be activated by adjusting the dip switches.
Mode Pumps Mode Dip Switch
Settings Pump Rotation Dip Switches Pump Exercise Switch
Inputs Outputs
2-Pump Modes
1 Call -
1 Flow
2 Pumps
Pump 1
¼ HP
Pump 1
Call
Input
Flow 1
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2
¼ HP
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Dip1= On
Dip2= Off
Pump 1
¼ HP
Pump 1
Call
Input
Flow 1
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2
¼ HP
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Per Call Rotation = Dip4= On, Dip5=Off, Dip6=Off
1 Day Rotation = Dip4= Off, Dip5=On, Dip6=Off
7 Day Rotation = Dip4= Off, Dip5=Off, Dip6=On
Pump 1
¼ HP
Pump 1
Call
Input
Flow 1
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2
¼ HP
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Exercise On = Dip7= On
Exercise Off = Dip7= Off
C1
F1
P1, P2
1 Call -
2 Flow
2 Pumps
Pump 1 (VFD)
¼ HP
Pump 1
Call
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2 (VFD)
¼ HP
Flow 1
Input
Flow 2
Input
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Dip1= On
Dip2= On
Pump 1 (VFD)
¼ HP
Pump 1
Call
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2 (VFD)
¼ HP
Flow 1
Input
Flow 2
Input
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Per Call Rotation = Dip4= On, Dip5=Off, Dip6=Off
1 Day Rotation = Dip4= Off, Dip5=On, Dip6=Off
7 Day Rotation = Dip4= Off, Dip5=Off, Dip6=On
Pump 1 (VFD)
¼ HP
Pump 1
Call
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2 (VFD)
¼ HP
Flow 1
Input
Flow 2
Input
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Exercise On = Dip7= On
Exercise Off = Dip7= Off
C1
F1, F2
P1, P2
3-Pump Modes
1 Call -
1 Flow
3 Pumps
Pump 1
¼ HP
Pump 1
Call
Input
Flow 1
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2
¼ HP
Pump 3
¼ HP
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Dip1= Off
Dip2= Off
Dip3= On
Pump 1
¼ HP
Pump 1
Call
Input
Flow 1
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2
¼ HP
Pump 3
¼ HP
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Per Call Rotation = Dip4= On, Dip5=Off, Dip6=Off
1 Day Rotation = Dip4= Off, Dip5=On, Dip6=Off
7 Day Rotation = Dip4= Off, Dip5=Off, Dip6=On
Pump 1
¼ HP
Pump 1
Call
Input
Flow 1
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2
¼ HP
Pump 3
¼ HP
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Exercise On = Dip7= On
Exercise Off = Dip7= Off
C1
F1
P1, P2, P3
2 Call -
2 Flow
3 Pumps
Pump 1
¼ HP
Pump 1
Call
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2
¼ HP
Aux Pump
(Pump 3)
¼ HP
Pump 2
Call
Input
Flow 1
Input
Flow 2
Input
Solenoid
Valve 1
Solenoid
Valve 2
1 2 3 4 5 6 7 8
On
80 VA
max.
80 VA
max.
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Dip1= Off
Dip2= Off
Dip3= Off
No Rotation Available
Pump 1
¼ HP
Pump 1
Call
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2
¼ HP
Aux Pump
(Pump 3)
¼ HP
Pump 2
Call
Input
Flow 1
Input
Flow 2
Input
Solenoid
Valve 1
Solenoid
Valve 2
1 2 3 4 5 6 7 8
On
80 VA
max.
80 VA
max.
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Exercise On = Dip7= On
Exercise Off = Dip7= Off
C1, C2
F1, F2
P1, P2, P3
3 Call -
3 Flow
without
Delay
3 Pumps
Pump 1
¼ HP
Pump 1
Call
Input
120 VAC
Earth
Ground
L
N
Pump 2
¼ HP
Pump 3
¼ HP
Pump 2
Call
Input
Flow 1
Input
Flow 2
Input
Pump 3
Call
Input
Flow 3
Input
120
VAC
Alarm
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Dip1= Off
Dip2= On
Dip3= On
Dip4= Off
No Rotation Available
Pump 1
¼ HP
Pump 1
Call
Input
120 VAC
Earth
Ground
L
N
Pump 2
¼ HP
Pump 3
¼ HP
Pump 2
Call
Input
Flow 1
Input
Flow 2
Input
Pump 3
Call
Input
Flow 3
Input
120
VAC
Alarm
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Exercise On = Dip7= On
Exercise Off = Dip7= Off
C1, C2,
C3
F1, F2, F3
P1, P2, P3
3 Call -
3 Flow
with 6
minute
Delay
3 Pumps
Pump 1
¼ HP
Pump 1
Call
Input
120 VAC
Earth
Ground
L
N
Pump 2
¼ HP
Pump 3
¼ HP
Pump 2
Call
Input
Flow 1
Input
Flow 2
Input
Pump 3
Call
Input
Flow 3
Input
120
VAC
Alarm
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Dip1= Off
Dip2= On
Dip3= On
Dip4= Off
No Rotation Available
Pump 1
¼ HP
Pump 1
Call
Input
120 VAC
Earth
Ground
L
N
Pump 2
¼ HP
Pump 3
¼ HP
Pump 2
Call
Input
Flow 1
Input
Flow 2
Input
Pump 3
Call
Input
Flow 3
Input
120
VAC
Alarm
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Exercise On = Dip7= On
Exercise Off = Dip7= Off
C1, C2,
C3
F1, F2, F3
P1, P2, P3

HT# 059296-00A
PLL Installation and Operation Manual 11
LEDS
Pump and Valve LEDs
• Each LED is assigned to its respective output operation. When a pump or a valve
output is active, its LED is lit.
Power LED
• The lower right LED is used to indicate the control power.
Alarm LEDs
• Alarm LEDs blink when their respective alarm output is active. The blinking
helps alert the use to their status from a far distance. See "Overview" on page 4.
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
BUTTON
• The PLL has only one button (Alarm Reset). The button is used to reset the alarm
status of any failed pump.
• When a pump fails to provide proof-of-ow within 30 seconds, its alarm output
is activated. The PLL will stop this pump from running and will not make it
available until the Alarm Reset button is pressed. See "Alarming" on page 4.
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
TROUBLESHOOTING
Power LED Not On
Check the power wiring to the PLL using a voltmeter set to AC. The PLL requires 120 VAC power source.
Pump Output Relays do not Turn On
To test any of the pump output relays, energize the relay by rst setting the control to 3-Call 3-Flow mode. See "Dip Switches" on
page 10. Then, initiate a call for the pump in question by shorting its (C) and (F) input terminals. Then test for continuity across the
output terminals using a continuity meter. If continuity exists, the relay is functioning properly. Otherwise, if no continuity exists,
check the fuse on the back of the Enclosure Display Module. The fuse is 20 mm 5 amp may need to be replaced.
Valve Output Relays do not Turn On
To test a valve output, the PLL dip switches must be set to 3- Pump 2-Call 2-Flow mode. See "Dip Switches" on page 10. Then,
initiate a call for the respective pump (C) and wait 30 seconds for the alarm output and valve output to be activated. Then test for
continuity across the output terminals using a continuity meter. If continuity exists, the relay is functioning properly. Otherwise,
if no continuity exists, check the fuse on the back of the Enclosure Display Module. The fuse is 20 mm 5 amp may need to be
replaced.
Alarm Output Relays do not Turn On
To test any of the alarm output relays, energize the respective pump relay by rst setting the control to 3-Call 3-Flow mode.
See "Dip Switches" on page 10. Then, initiate a call for the respective pump (C) and wait 30 seconds for the alarm output to
be activated. Then test for continuity across the output terminals using a continuity meter. If continuity exists, the relay is
functioning properly. Otherwise, if no continuity exists, check the fuse on the back of the Enclosure Display Module. The fuse is
20 mm 5 amp may need to be replaced.

HT# 059296-00A
12 PLL Installation and Operation Manual
WIRING AND PIPING DIAGRAMS
2-PUMP 1-CALL 1-FLOW WIRING
DIP Switch Settings:
Dip1 = ON (2-Pump Mode)
Dip2 = OFF (1-Call + 1-Flow Mode)
Dip4 - 6 = Choose Rotation option
ELECTRIC
Pump 1
¼ HP
Pump 1
Call
Input
Flow 1
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2
¼ HP
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Pump 1
¼ HP
Pump 1
Call
Input
Flow 1
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2
¼ HP
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Warning
Inputs are dry-contact. No voltage should be placed across
the input terminals.
Ouput sourcing terminals provide 120 VAC. See output
rating prior to connecting equipment to avoid output damage.

HT# 059296-00A
PLL Installation and Operation Manual 13
Flow
Switch
Pump2
Pump1
Boiler or
Heating Source
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2 RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING)
3
G
ALERT
Heat-Timer is aware that each installation is unique. Thus, Heat-Timer is not responsible for
any installation related to any electrical or plumbing diagram generated by Heat-Timer. The
provided illustrations are to demonstrate Heat-Timer’s control operating concept only.
MECHANICAL
2-PUMP 1-CALL 1-FLOW PIPING

HT# 059296-00A
14 PLL Installation and Operation Manual
2-PUMP 1-CALL 2-FLOW WIRING
DIP Switch Settings:
Dip1 = ON (2-Pump Mode)
Dip2 = ON (1-Call + 2-Flow Mode)
Dip4 - 6 = Choose Rotation option
ELECTRIC
Pump 1 (VFD)
¼ HP
Pump 1
Call
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2 (VFD)
¼ HP
Flow 1
Input
Flow 2
Input
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Pump 1 (VFD)
¼ HP
Pump 1
Call
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2 (VFD)
¼ HP
Flow 1
Input
Flow 2
Input
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Warning
Inputs are dry-contact. No voltage should be placed across
the input terminals.
Ouput sourcing terminals provide 120 VAC. See output
rating prior to connecting equipment to avoid output damage.

HT# 059296-00A
PLL Installation and Operation Manual 15
ALERT
Heat-Timer is aware that each installation is unique. Thus, Heat-Timer is not responsible for
any installation related to any electrical or plumbing diagram generated by Heat-Timer. The
provided illustrations are to demonstrate Heat-Timer’s control operating concept only.
1 2 3 4 5 6 7 8
On
VFD
Pump2
VFD
Pump1
Boiler or
Heating Source
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2 RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING)
3
G
MECHANICAL
2-PUMP 1-CALL 2-FLOW PIPING

HT# 059296-00A
16 PLL Installation and Operation Manual
3-PUMP 1-CALL 1-FLOW WIRING
DIP Switch Settings:
Dip1 = OFF (3-Pump Mode)
Dip3 = ON (1-Call + 1-Flow Mode)
Dip4 - 6 = Choose Rotation option
ELECTRIC
Pump 1
¼ HP
Pump 1
Call
Input
Flow 1
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2
¼ HP
Pump 3
¼ HP
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Pump 1
¼ HP
Pump 1
Call
Input
Flow 1
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2
¼ HP
Pump 3
¼ HP
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Warning
Inputs are dry-contact. No voltage should be placed across
the input terminals.
Ouput sourcing terminals provide 120 VAC. See output
rating prior to connecting equipment to avoid output damage.

HT# 059296-00A
PLL Installation and Operation Manual 17
ALERT
Heat-Timer is aware that each installation is unique. Thus, Heat-Timer is not responsible for
any installation related to any electrical or plumbing diagram generated by Heat-Timer. The
provided illustrations are to demonstrate Heat-Timer’s control operating concept only.
Flow
Switch
Pump2
Pump1 Pump3
Boiler or
Heating Source
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2 RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING)
3
G
MECHANICAL
3-PUMP 1-CALL 1-FLOW PIPING

HT# 059296-00A
18 PLL Installation and Operation Manual
3-PUMP 2-CALL 2-FLOW WIRING
DIP Switch Settings:
Dip1 = OFF (3-Pump Mode)
Dip2 = OFF (2-Call + 2-Flow Mode)
ELECTRIC
Pump 1
¼ HP
Pump 1
Call
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2
¼ HP
Aux Pump
(Pump 3)
¼ HP
Pump 2
Call
Input
Flow 1
Input
Flow 2
Input
Solenoid
Valve 1
Solenoid
Valve 2
1 2 3 4 5 6 7 8
On
80 VA
max.
80 VA
max.
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Pump 1
¼ HP
Pump 1
Call
Input
120 VAC
Earth
Ground
L
N
120
VAC
Alarm
Pump 2
¼ HP
Aux Pump
(Pump 3)
¼ HP
Pump 2
Call
Input
Flow 1
Input
Flow 2
Input
Solenoid
Valve 1
Solenoid
Valve 2
1 2 3 4 5 6 7 8
On
80 VA
max.
80 VA
max.
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Warning
Inputs are dry-contact. No voltage should be placed across
the input terminals.
Ouput sourcing terminals provide 120 VAC. See output
rating prior to connecting equipment to avoid output damage.

HT# 059296-00A
PLL Installation and Operation Manual 19
3-PUMP 2-CALL 2-FLOW PIPING
ALERT
Heat-Timer is aware that each installation is unique. Thus, Heat-Timer is not responsible for
any installation related to any electrical or plumbing diagram generated by Heat-Timer. The
provided illustrations are to demonstrate Heat-Timer’s control operating concept only.
Boiler 2
Flow
Switch 2
Pump 2
Boiler 1
Flow
Switch 1
Pump 1
Aux Pump 3
Solenoid 1Solenoid 2
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2 RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING)
3
G
MECHANICAL

HT# 059296-00A
20 PLL Installation and Operation Manual
3-PUMP 3-CALL 3-FLOW WIRING
DIP Switch Settings:
Dip1 = OFF (3-Pump Mode)
Dip2 = ON (3-Call + 3-Flow Mode)
Dip3 = ON
Dip4 = OFF (6 Minute Delay) or Dip4=ON (No Delay)
ELECTRIC
Pump 1
¼ HP
Pump 1
Call
Input
120 VAC
Earth
Ground
L
N
Pump 2
¼ HP
Pump 3
¼ HP
Pump 2
Call
Input
Flow 1
Input
Flow 2
Input
Pump 3
Call
Input
Flow 3
Input
120
VAC
Alarm
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Pump 1
¼ HP
Pump 1
Call
Input
120 VAC
Earth
Ground
L
N
Pump 2
¼ HP
Pump 3
¼ HP
Pump 2
Call
Input
Flow 1
Input
Flow 2
Input
Pump 3
Call
Input
Flow 3
Input
120
VAC
Alarm
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
Pump 1
¼ HP
Pump 1
Call
Input
120 VAC
Earth
Ground
L
N
Pump 2
¼ HP
Pump 3
¼ HP
Pump 2
Call
Input
Flow 1
Input
Flow 2
Input
Pump 3
Call
Input
Flow 3
Input
120
VAC
Alarm
1 2 3 4 5 6 7 8
On
12
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
10 11 12 13 14 15 16 17 18 19
LN
RS-485
VALVES
A1 A2 A3
PWR
24
20 22
21 23 25 29
27
26 28 30
CAUTION: Risk of Electric Shock. Use Copper Conductors Only.
Wire all circuits as Class I or Electric Ligh and Power Circuits.
2A RESISTIVE, 120VAC
1/4 HP, 120VAC 60Hz, Pilot Duty 80VA, 120VAC
OUTPUT RATINGS:
ALARM 2
ALARM 3
COM
POWER
ALARM 1
PUMP 2
PUMP 3
VALVE 1
VALVE 2
PUMP 1
ALARM
RESET
PLL
PUMP LEAD-LAG
MAXIMUM 6A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX.
DIP SWITCHES
31
C1 C2 C3 F1 F2 F3
PUMP CALL FLOW INPUTS
ALARMS
V1 V2
LNLN
6 7 8 9
P2 P3
LN
4 5
P1
LNLN
PUMPS
OUTPUT (SOURCING 120VAC)
3
G
With 6 Minute Delay
Without Delay