8
Section 7 - Wiring
7.1 Wiring Instructions
- Wiring should be in accordance with the National Electrical Code (NEC) and any local
codes or regulations. Have a licensed and competent electrician ensure that the voltage
supplied matches the compressor voltage.
- Inadequate wiring size can cause insufficient voltage at the compressor during start-up.
Overheating and damage can result to the motor and controls.
- Failure to use the pressure switch may result in overpressure of the compressor or other
components in the system. Overpressure of the compressor can result in blown head
gaskets or other damage.
- Grounding Instructions: This product must be connected to a grounded, metallic,
permanent wiring system, or an equipment grounding terminal or lead on the product.
The supply wire must be of adequate size and no other equipment should be connected
to the same line. The adjacent table lists the recommended wire size for each model
based on a 100’ run and lowest operating voltage. Consult factory for longer runs.
- Single-phase motors include internal thermal
overload protection, which has an automatic reset
device.
- Disconnect electrical power before servicing to
disable reset devices. Thermal protection can
automatically start the motor when the protector
resets.
The motor is pre-wired to the pressure switch provided, which controls starting (cut-in pressure) and stopping (cut-out
pressure) of the motor. The pressure switch is factory set. Tank-less riser mount models have the switch set at 20 cut-in and
26 psig cut-out. Riser Mount with Tank have the switch set at 50 psig cut-in and 70 psig cut-out.
A motor starter can be used, for all single phase models.
Consult the National Electric Code and local codes for motor
starter requirements. Refer to the proper wiring instruction drawing for recommended wiring to a starter.
Minimum Recommended Wire Size
60Hz Model #
1 Phase
QRM2-25115
12
QRM2-25220
12
QRM2-25115T
12
QRM2-25220T
12
QRM2-50115
12
QRM2-50220
12
QRM2-50115T
12
QRM2-50220T
12
QRM2-100115T
12
QRM2-100220T
12
WARNING
CAUTION
NOTICE
NOTICE
NOTICE
WARNING
