Product data

Vertical units

All guidelines established for horizontal units also apply for

vertical units. In addition, since vertical units tend to be in-

stalled in small equipment rooms or closets, the following

additional guidelines apply:

1. Mount the unit on a pad made of high-density sound

absorbing material such as rubber or cork. Extend the

pad beyond the WSHP unit footprint by at least

6 inches in each direction.

2. Since the unit returns airflow through a grille

mounted in a closet door, provide a sound barrier or

some other modification of the closet to prevent line-

of-sight noise into the space.

3. Follow good duct design practice in sizing and locat-

ing the connection of the WSHP discharge to the

supply duct system. Use an elbow with turning vanes

and bent in the direction of the fan rotation to mini-

mize turbulence. Make any duct transitions as smooth

and as gradual as possible to again minimize turbu-

lence and loss of fan static pressure.

Solenoid valves

In applications using variable flow pumping, solenoid

valves can be field installed and operated from the control

board in the Aquazone™ WSHP unit.

Freeze protection

Applications where systems are exposed to outdoor

temperatures below freezing (32 F) must be protected from

freezing. The most common method of protecting water

systems from freezing is adding glycol concentrations into

the water. Design care should be used when selecting both

the type and concentrations of glycol utilized due to the

following:

• Equipment and performance may suffer with high con-

centrations of glycol and other antifreeze solutions.

• Loss of piping pressure may increase greatly, resulting

in higher pumping costs.

• Higher viscosity of the mixture may cause excess corro-

sion and wear on the entire system.

• Acidity of the water may be greatly increased, promot-

ing corrosion.

• Glycol promotes galvanic corrosion in systems of dis-

similar metals. The result is corrosion of one metal by

the other, causing leaks.