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VFD
Pump1
VFD
Pump2
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.
PLL Installation and Operation Manual
2-PuMP 1-CaLL 2-FLOW PIPIng
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)
PUMPS
VALVES
PWR
P1
P2
P3
V1
V2
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
ALARM 1
ALARM 2
ALARM 3
PUMP LEAD-LAG
COM
ALARM
POWER
RESET
ALARMS
A1
A2
A3
Boiler or
Heating Source
aLerT
MeCHanICaL
PLL
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
C1
C2
C3
F1
F2
F3
20
21
26
22
23
24
25
27
28
29
30
31
15
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