Wiring Connections - Lennox VRF VWMB Series Installation Instruction

Capacity
VWMB007H4 - VWMB018H4
VWMB007H4 - VWMB018H4
VWMB024H4 - VWMB030H4
VWMB024H4 - VWMB030H4
*Optional pump maximum suction lift is measured from the pump outlet.

Wiring Connections

WARNING
Isolate the power supply before accessing unit electrical
terminals.
Install unit so that unit disconnect is accessible.
Follow all local and national codes, as well as this
installation instruction, during installation. Do NOT
overload electrical circuit, as this may lead to failure and
possible fire.
Use specified wiring and cable to make electrical
connections. Clamp cables securely and make sure that
connections are tight to avoid strain on wiring. Insecure
wiring connections may result in equipment failure and
risk of fire.
Wiring must be installed so that all cover plates can be
securely closed.
CAUTION
This unit must be properly grounded and protected by a
circuit breaker. The ground wire for the unit must not be
connected to a gas or water pipe, a lightning conductor
or a telephone ground wire.
Do not connect power wires to the outdoor unit until
all other wiring and piping connections have been
completed.
Install all wiring at least 3 feet away from televisions,
radios or other electronic devices in order to avoid the
possibility of interference with the unit operation.
Do not install the unit near a lighting appliance that
includes a ballast. The ballast may affect remote control
operation.
In the U.S.A., wiring must conform with current local
codes and the current National Electric Code (NEC). In
Canada, wiring must conform with current local codes
and the current Canadian Electrical Code (CEC).
Refer to unit nameplate for minimum circuit ampacity and
maximum overcurrent protection size.
Table 3. Condensate Pump Accessory Options
Model
Brand
Name
MicroBlue
MicroBlue
Fascia Kit
Blue
Diamond MaxiBlue
w Reservoir
MaxiBlue
w DrainStik
9
Max Flow
Model # Cat # Rate
(gal per hr)
X85-003 14T74
T18-016 17A24
X87-721 14T69
X87-722 17A23
1. Lift indoor unit front panel to access the control
box over. Remove the screw(s) securing the cover.
Remove the plate.
2. Locate the terminal strip in the control box. Connect
the power wiring (sized per NEC/CEC and local
codes) and communications cable (three-conductor,
shielded cable). Refer to unit nameplate for rated
voltage.
3. If the indoor unit is the final unit in a group that is wired
in series, install the provided resistor across terminals
P and Q.
4. Remove spacer. Secure bottom of unit to wall mounting
bracket. Continue with installation of outdoor unit and
system commissioning.
VWMB007H4, VWMB009H4, VWMB012H4,
VWMB015H4, VWMB018H4
VWMB024H4, VWMB030H4
Figure 11. Accessing Control Box
NOTE - Two-conductor shielded cable must be used for
the communication wiring. This is necessary to ensure
proper system communication and operation.
Max
Max
suction
head (ft.)
lift*
1.3 16
- -
3.7 23 16.5 ft
3.7 23 16.5 ft
CONTROL BOX
COVER
L 1 L 2
POWER WIRING
COMMUNICATION
WIRING
CONTROL BOX
COVER
POWER WIRING COMMUNICATION
WIRING
6 ft
-