Operation; Start-Up Procedure - Aprilaire 1150 Installation, Operation And Maintenance Manual

OPERATION

HUMIDIfIER START-UP PROCEDURE
wARNINg
Line voltage may cause serious injury or death from electrical shock . Do not remove the power/ heater
terminal cover until electrical power is disconnected . Only qualified electrical personnel should perform start-up procedure .
After the system is properly installed and connected to both electrical and water supplies, it can be started .

START-UP PROCEDURE:

Steam Chamber
Before filling with water, check mounting to verify that the steam chamber is level and securely supported .
Piping
Verify that all piping connections are completed as recommended and that water pressure is available .
Use cold or hot supply water . If the water pressure is above 60 psi (415 kPa) and/or water hammer is excessive, install a
pressure-reducing valve or shock arrester . Even though the humidifier has an internal 1" (25 mm) air gap, some governing codes
may require backflow prevention .
IMPORTANT: Minimum water supply pressure is 25 psi (175 kPa) .
Electrical
Before start-up, verify that electrical connections have been made per
governing codes and the wiring requirements listed in this manual .
• V erify that all power terminal screws and lugs are tight from power block to
heaters . See Table 7 for torque specifications .
• V erify that the transformer, drain valve, fill valve, and contactor electrical
plugs located under the humidifier shroud are completely plugged in .
• C onfirm the internal controller board slide switch S1 and S2 positions
marked 1 through 16 are in the correct on or off position .
TAblE 7 – Torque Specifications
Screw or lug location
inch-lbs Nm
Power block 16
Contactor or Relay 16
8-32 nut
20
(8 .5 mm)
Heater
nut
10-32 nut
25
(9 .5 mm)
6 gauge wire
35
(10 mm )
2
Heater 8 gauge wire
25
wire lug (6 mm )
2
10-14 gauge wire
20
(<6 mm )
2
Torque
1 .8
1 .8
2 .2
2 .8
4 .0
2 .8
2 .2
33