Herrmidifier Dual Pneumatic User Manual

Page 6

Dual-Pneumatic

I n s t a l l a t i o n , O p e r a t i o n & S e r v i c e M a n u a l

IV. PLUMBING

Each cabinet has an air inlet, water inlet, air outlet, water

outlet and a drain. All air connections are ¾” and all water

connections, including drain, are ½”.

1. Drain loop must extend 3” above highest location of

heads or water outlet port on cabinet. This loop allows

water pressure to be relieved on system shutdown while

maintaining water volume inside piping.

2. Piping from control cabinet to manifolds should be ¾”

for the air and ½” for the water piping unless otherwise

shown on your job specific drawings provided for your

project.

NOTE: Inlet water pressure must be in range of 50-100 psig.

Consult the factory if you are outside this range.

Supply Power

1. Supply power of 120 VAC, 5 amps is required.

2. Field wiring of the main power supply is connected

directly to the terminal strip in the control cabinet. A

ground lug is provided for the ground wire.

3. Install external over current protection and provide wiring

in accordance with the NEC, state and local codes.

4. Power supply must be “clean”; free of spikes, surges

and sags; +10%, -15% of nominal. Ground should be

true earth ground.

V. CONTROLS

Controls may be supplied by the factory or others. The

following information applies to all controls factory supplied

or furnished by others. All external electrical control

circuits are to be connected to the unit using the terminal

strip located in the electrical compartment. Field wiring

from humidistat to humidifier and between safety devices,

such as high limit humidistat and air proving switches,

should be 18 AWG stranded or 20 AWG solid wire. Wall

devices should be mounted at a height similar to that of

a typical thermostat and should be located in an area

that will provide good representation of the overall space

being humidified. Do not mount wall devices directly in

the air stream of a supply grille or room distribution unit.

Control Circuit Connections

ON/OFF

1. Control Input - Unit will operate with any two-position

device. Demand for humidity will close the contact.

2. Limit Input - Unit will operate with any two-position

device. The humidistat contact will open on humidity

rise.

WARNING

Do not mount any controls inside the unit or tap power

from any location in the unit, except as stated in these

instructions. Do not place objects near the cabinet. Do not

attach to dry wall without studs.

CAUTION

Any minerals that are in the water will be injected into the

airstream. Your application/process may require some

means of air or water filtration to complete a successful

application. Consult the factory if you should have any

questions. Softening the water only increases the TDS level.