Carnes HBDA Installation Manual

READ AND SAVE THESE INSTRUCTIONS

ELECTRONICALLY CONTROLLED STEAM HUMIDIFIER

DESIGN SERIES HB

INSTALLATION, OPERATION

AND MAINTENANCE MANUAL

CARNES COMPANY, 448 S. Main St., P. O. Box 930040, Verona, WI 53593-0040 Phone: [phone] Fax:[phone] [e-mail] http://www.carnes.com

External Disconnect
or Circuit Breaker

(Not Provided by Carnes)

Water Shutoff Valve

(Not Provided by Carnes)

FORM 16632-B

Steam Hose

Water Strainer

Fill Solenoid
Valve

Door
Interlock

“On” Lamp

Steam Output
Rate Meter

“Abnormal” Lamp

“On-Off-Drain”
Switch

Magnetic
Overload
Switch

Low V oltage
Fuse

Steam Output
Control

Hose Clamp

Cylinder
Retaining
Band

Steam
Cylinder

Drain Solenoid
Valve

Brass Cylinder
Fitting

Photo A

MODEL HBDA SHOWN

INSTALLATION

UNPACKING AND INSPECTION

1.

2.

3.

4.

5.

A manila envelope attached to the outside of the cab­inet contains the following items:
A. Installation instr uctions
B. One cabinet key

Open the cabinet and check for concealed shipping
damage. Report any damage immediately to the car­rier who delivered shipment.

The following components are packed in a shipping
carton for connection when installing humidifiers:
A. Distributor pipe
B. Steam hose
C. Condensate return line

Optional accessories may be packed with the cabinet
or in the same shipping carton. Large accessories
ship in separate cartons.

Inside the cabinet are the following items:
A. Steam hose clamps
B. Condensate return line clamps
C. Air gap drain fitting

1.

2.

3.

Remove the large nut and plastic gasket located on
the fitting on the bottom of the cabinet (Photo B). The
nut and gasket may be used with standard type drain
fitting if an air gap drain fitting is not required by local
codes.

Connect the air gap drain fitting to the cabinet drain
connection. Drop plastic insert into the top of the air
gap drain fitting before connecting. It may be neces­sary to cut off some of the air gap fitting depending on
available space.

Connect the drain or air gap fitting to S or P Trap.
Note: If the drain water pump accessory package is
used, follow instructions included with the drain water
pump package.

MOUNTING THE HUMIDIFIER

Mount the humidifier cabinet securely on a level and
plumb surface near the ductwork. Allow 6” or more on
each side for proper ventilation and a minimum of 16”from
the bottom of th cabinet to the floor to allow space for the
drain connection. The humidifier must never be mounted
outside or where it may be exposed to freezing tempera­tures. Maximum operating weights for the humidifier are
shown below.

TABLE 1

MAXIMUM OPERATING WEIGHT

MODEL WEIGHT (Pounds)

HBDA 85
HBEA 130

HBFA 175
HBGA 105
HBHA 185

HBJA 260

WATER SUPPLY CONNECTION
Use ordinary tap water (20 to 120 psi) — DO NOT use hot

or deionized water. A 3/8” FPT fitting is provided at the

top of the humidifier for connection to tap water supply. A
shut-off valve, not provided by Car nes, must be installed
just ahead of this fitting.

DRAIN LINE CONNECTION

Drain Line
Connection

Photo B

MODEL HBDA SHOWN

TYPE OF WALL

6 FASTENERS REQUIRED (Models HBDA, HBEA & HBFA)
8 FASTENERS REQUIRED (Models HBGA, HBHA, & HBJA)

Wood Studs or Solid Wood 1/4” Lag Screws
Hollow Plaster 1/4” Molly Bolts or Toggle Bolts
Sheet Metal 1/4” Thread Forming Screws
Cement or Masonery 1/4” Lead Type Anchor and Bolts

FASTENER RECOMMENDATION

1.2.Steam distributor pipe must be mounted on a plumb

surface. When mounted on a plumb surface the stan­dard distributor pipe for Models HBDA, HBEA and
HBFA pitches downward and is inclined upward for
Models HBGA, HBHA and HBJA. This is required so
the condensate which forms in the distributor pipe will
drain to the return line and back to the unit.

Steam distributor pipe should be mounted in the duct
to insure even distribution of steam across the center
portion of the duct (Figure A). The condensate return
line must always be kept on the bottom. A minimum
clearance of 4” must be maintained between the duct
and distributor pipe. The steam distributor pipes are
designed with a steam outlet hole pattern which gives
even distribution, y et k eeps steam a w a y from the sides
of the duct.

The standard humidifier steam distributor pipe must
never be installed v ertically. If air flows are vertical, the
steam distributor pipe should be installed horizontally
(Figure B).

The steam distributor pipes should be installed in the
supply air stream, downstream of the fan (Figure C).
When installed in packaged units (central station air
handlers, multizone units, make-up air units, etc.) the
distributor pipe should be mounted just downstream of
the fan discharge in the primary air stream.

INSTALL STEAM DISTRIBUTOR PIPE

3.

4.

5.

6.

In multizone applications it is preferable to have a sep­arate humidifier serving each zone. However, steam
can be introduced into the hot deck upstream of the
zone dampers. In this case, good distribution of steam
across the entire hot deck is very important.

It is preferable to locate the steam distributor pipes
downstream from any obstructions in the ductwork so
that air can absorb moisture before it impinges on a
surface and accumulates. There must be a minimum
of three feet between the steam distributor pipes and
any fans, coils , filters , z one dampers, elbo ws or outlets
which may be installed downstream of the distributor
pipe. Howe v er, in all cases, the steam distributor pipes
should be located as far upstream from any such
obstruction as possible.

An adhesive backed template is provided for each dis­tributor pipe. This provides the hole pattern for mount­ing each steam distributor pipe. Using the template(s),
cut necessary holes in ductwork at desired location of
distributor pipe.

Inset any distributor pipe into duct and secure tightly
with four sheet metal screws, not provided by Car nes.

Special distributor pipes are shipped with specific
instructions on how to mount them.

If the accessory fan distribution unit is to be used, fol­low the instructions included with the unit.

INSTALLATION

Figure A

Figure B Figure C