Modine Manufacturing SCW Installation And Service Manual - Warning

INSTALLATION

6 

8-504.6 

Figure 6.1 

Hot/Chilled Water Coil Piping Installation 

Piping Insulation 

Refrigerant, chilled water and condensate pipes should be 

insulated right up to the unit chassis to prevent condensation 

which can damage the ceiling and objects located below the 

piping.  Chilled water valves must also be insulated to 

prevent sweating. 

Wiring 

 WARNING 

1.  Disconnect power supply before making wiring 

connections to prevent electrical shock and 

equipment damage. 

2.  All appliances must be wired strictly in accordance 

with the wiring diagram furnished with the appliance.  

Any wiring different from the wiring diagram could 

result in a hazard to persons and property. 

3.  Any original factory wiring that requires replacement 

must be replaced with wiring material having a 

temperature rating of at least 105°C. 

4.  Ensure that the supply voltage to the appliance, as 

indicated on the serial plate, is not 5% greater than 

rated voltage. 

 CAUTION 

Ensure that the supply voltage to the appliance, as 

indicated on the serial plate, is not 5% less than the rated 

voltage. 

Installation of wiring must conform with local building codes, 

or in the absence of local codes, with the National Electric 

Code ANSI/NFPA 70 – Latest Edition.  Unit must be 

electrically grounded in conformance to this code.  In 

Canada, wiring must comply with CSA C22.1, Electrical 

Code. 

Electric wiring must be sized to carry the full load amp draw 

of the motor, starter and any controls that are used with the 

unit.  See Table 19.1 for Electrical Data. 

This equipment in its standard form is designed for an 

electrical supply of 208-230V, 1Ph, 60Hz.  When connection 

to a 115V, 1Ph, 60Hz supply is necessary, a factory 

mounted step up transformer must be fitted to the unit. 

Any damage to or failure of units caused by incorrect wiring 

of the units is not covered by warranty. 

Once the refrigeration pipe work is complete, the electrical 

supply can be connected by routing the cable through the 

appropriate casing hole and connecting the supply and 

ground cables to the unit’s power terminals.  A plastic sleeve 

is provided inside the control panel.  Low voltage control 

wiring must run through the plastic sleeve on the inside of 

the control panel. 

Terminal Strip Connections 

The terminal strip connections are designed to clamp down 

on the wires.  To properly connect the wires to the terminal 

strip: 

1.  Push a small flat head screwdriver into the square hole 

on the terminal.  Press firmly until the screwdriver hits 

the back stop and opens the terminal.  See Figure 6.2. 

2.  Remove approximately 3/8” of insulation from the end of 

the wire and push the stripped wire into the oval hole in 

the terminal. 

3.  Remove the screwdriver.  Pull on the wire to make sure 

that it is securely clamped in the terminal. 

4.  Make sure that the terminal clamp is in contact with bare 

wire (insulation removed). 

Figure 6.2 

Terminal Strip 

Fascia Assembly 

Once the services have been connected, the four (4) fascia 

mounting bolts can be unscrewed approximately 1” from the 

condensate tray support channels.