White Rodgers 8A18Z-2 installation instructions INSTALLATION cont’d, Wiring, Checkout

Models: 8A18Z-2

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INSTALLATION (cont’d)

5. Select an appropriate location for mounting the con-

trol. Position the case on a smooth flat surface in a

vertical position only (with electrical knockouts down).

INSTALLATION (cont’d)

All wiring should be done in accordance with local and national electrical codes and ordinances.

Mount the case using flat washers and screws (not

provided) through the four mounting holes in the back

of the case.

NOTE

Install conduit, then run wiring and install the thermostat according to thermostat installation instructions (included with thermostat) before installing panel assembly in case.

!CAUTION

Non-metallic enclosure does not provide ground- ing between conduit connections. Use grounding bushings and jumper wires to ensure proper

WIRING N 120V

HOT

GNDCHECKOUT

PUMP MOTOR

(120 V)

L0

COM

HI

2-SPEED FAN

(120 V)

120 VAC DIAGRAM

1F51-619 or 1F51W-619 THERMOSTAT

R W Y G

 

 

 

8A18Z-2

 

N 120V

L2 240V

 

R

P2 120V

P2 240V

 

 

 

 

 

PUMP

W

F2 120V

F2

240V

 

RELAY

 

 

 

 

FAN SPEED

Y

L1

P1

 

 

PUMP

RELAY

 

 

 

 

 

 

 

 

 

 

RELAY

 

G

L0

 

 

FAN TIMER

 

 

RELAY

 

LO SPEED

 

 

 

 

 

FAN

 

FAN

 

 

HI

 

 

 

 

TIMER

 

 

HI SPEED

 

 

RELAY

 

 

FAN

 

 

 

 

 

 

INTERNAL WIRING

 

 

 

FIELD INSTALLED WIRING

 

 

 

ELECTRICAL CONNECTION

grounding of control.

6.After wiring is run into case, bend the wires out slightly so that the wires will be in front of the panel assembly when it is installed.

7.Loosen the three panel mounting screws in the case approximately one turn. Slide the two slots located at the top of the panel assembly under the two mounting screws at the top of the case. Lower the panel assem- bly into the case until the bottom mounting screw protrudes through the keyhole slot on the panel. Slide the panel assembly up toward the top of the case, then hold the panel assembly in place while tightening all three mounting screws.

L2 Manual background

240V HOT

L1 HOT

GNDManual background

PUMP MOTOR

(240 V)

L0

COM

HI

2-SPEED FAN

(240 V)

240 VAC DIAGRAM

1F51-619 or 1F51W-619 THERMOSTAT

R W Y G

 

 

 

8A18Z-2

 

N 120V

L2 240V

 

R

P2 120V

P2 240V

 

 

 

 

 

PUMP

W

F2 120V

F2

240V

 

RELAY

 

 

 

 

 

 

 

 

FAN SPEED

Y

L1

P1

 

 

PUMP

RELAY

 

 

 

 

 

 

 

 

 

 

RELAY

 

G

L0

 

 

FAN TIMER

 

 

RELAY

 

LO SPEED

 

 

 

 

 

FAN

 

FAN

 

 

HI

 

 

 

 

TIMER

 

 

HI SPEED RELAY

 

 

FAN

 

 

 

 

 

 

INTERNAL WIRING

 

 

 

FIELD INSTALLED WIRING

 

 

 

ELECTRICAL CONNECTION

!CAUTION

Do not over tighten panel mounting screws to avoid damage to the panel assembly.

8.Connect wires to proper terminals (see fig. 4 for typical wiring connections).

!CAUTION

Do not press against panel assembly while tight- ening terminal screws to avoid damage to the panel assembly.

9.Replace cover and test operation per the checkout section.

WIRING

!CAUTION

To prevent electrical shock and/or equipment damage, disconnect electric power to system at main fuse or circuit breaker box until installation is complete.

Figure 4. Typical wiring diagrams

CHECKOUT

1.After mounting and wiring has been completed, set thermostat switch to “OFF” position and fan switch to “LO” position. Turn thermostat lever to “5” and thermo-

stat switch to “COOL”. Nothing should happen pro- vided the room temperature is below 95°F.

2.Turn thermostat lever to “1”. The pump should start

immediately, provided the room temperature is above 55°F.

3.After a time delay of 30 to 120 seconds to allow the cooling pads to become soaked, the fan should start running at low speed.

4.Turn fan switch to “HI” position. The fan should now be operating on high speed.

5.Turn thermostat switch to “VENT” position. The pump should stop immediately.

6.Turn the thermostat switch to “OFF” position. After a delay of 3 to 30 seconds, the fan should stop running.

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White Rodgers 8A18Z-2 installation instructions INSTALLATION cont’d, Wiring, Checkout