Grundfos UPML, Installation And Operating Instructions Manual

Page: 10 / 20

English (US)
10
• UL-approved UPML and UPMXL circulators are equipped with
a conduit box for easy installation of the power supply cable.
• The motor is protected by the electronics in the control box
and requires no external motor protection.
• The pump can be connected to the power supply by a 3-wire
cable with ground connection.
Fig. 8 Conduit box connection
5.5.2 Signal cable connection
• The UPML/UPMXL AUTO pumps are internally speed-
controlled and have no active signal cable connection. It is
covered by a blind plug.
PWM
The UPML/UPMXL PWM pumps are externally speed-controlled
by a digital low-voltage PWM signal. To enable pump control, a
signal cable is required.
• PWM A profile for Heating: Without signal the pump will
always run at maximum speed.
The signal cable has two or three leads. The signal cable must be
connected to the control box by a dubox housing with an FCI
terminal block and terminals.
Fig. 9 PWM signal cable connection
0-10 VDC
UPML and UPMXL PWM circulator pumps are externally speed-
controlled by an analog 0-10 VDC signal. To enable pump control,
a signal cable is required.
The signal cable has two or three leads. The signal cable must be
connected to the control box by a dubox housing with an FCI
terminal block and terminals.
Fig. 10 VDC signal cable connection
The ground symbol identifies any terminal which is
intended for connection to an external conductor for
protection against electrical shock in case of a fault,
or the terminal of a ground electrode.
TM
07
0
541
02
18
WARNING
Electric shock
Death or serious personal injury
- The pump must be connected to an external mains
switch with a minimum contact gap of 0.12 inches
(3 mm) in all poles.
- Grounding or neutralization must be used for
protection against indirect contact.
WARNING
Electric shock
Death or serious personal injury
- External signal cables must be in accordance with
chapter 725 of the NEC in order to insulated this
circuit from others. The suitable type of signal
cable is type CL3, CL3R, CL3P or equivalent.
Do not connect the signal reference wire to the
ground.
Connect the signal wires to the correct poles.
Otherwise the pump might be damaged.
L N
Black Line
White Neutral
Green Ground
T
M
07
03
52
05
1
8
T
M
07
03
52
05
1
8
Black: PWM output (optional)
Blue: Signal reference
Brown: PWM input
Plug
Black: Signal output (optional)
Blue: Signal reference (-)
Brown: Signal input (+)
Plug
UPMM_UPML_UPMXL_US.book Page 10 Tuesday, February 26, 2019 10:18 PM