Carnes HBAB Installation Manual

READ AND SAVE THESE INSTRUCTIONS

SERIES HB HUMIDIFIERS

INSTALLATION,

OPERATION AND MAINTENANCE MANUAL

External Disconnect
or Circuit Breaker
lN0 t Provided by Carries)

---7-p

1

-mm
\

;A

-----\

Water Shutoff Valve

(Not Provided by

, Door
I

I

Steam Hose

“On” Lamp

Steam Output--

Rate Meter

Circuit/
Breakers

- Water Strainer

- Fill Solenoid
Valve

- Hose Clamp

Steam
Cylinder

Photo A

MODEL HBDB SHOWN

_

Drain Solenoid
Valve

Brass Cylinder
Fitting

FORM 16668
Issued: 04-01-83

INSTALLATION

UNPACKING AND INSPECTION

1. A manilla envelope attached to the outside of
the cabinet contains the following items:
A. Installation instructions

B. One cabinet key

2. Open the cabinet and check for concealed
shipping damage. Report any damage im-

mediately to the carrier who delivered ship­ment.

3. The following components are packed in a
shipping carton for connection when install-

ing humidifier:
A. Distributor pipe

B. Steam hose

C. Condensate return line

4. Optional accessories may be packed with the

cabinet or in the same shipping carton. Large
accessories may ship in separate cartons.

5. Inside the cabinet are the following items:
A.

Steam

hose clamps
B. Condensate return line clamps
C. Air gap drain fitting

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 the cabinet

to the floor to allow sapce for the drain connect-

ion. The humidifier must never be mounted out­side or where it may be exposed to freezing temp­eratures.

Maximum operating weights for the

humidifiers are shown below.

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 Carnes, must be installed just ahead
of this fitting.

DRAIN LINE CONNECTION

1. 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.

2. Connect the air gap drain fitting to the cabinet
drain connection. Drop plastic insert into the
top of the air gap drain fitting before connect-

ing. It may be necessary to cut off some of the

air gap fitting depending on available space.

3. 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.

TABLE 1

MAXIMUM OPERATING WEIGHT

I

\

MODEL WEIGHT (Pounds)

Hl3AB
HBDB 85
HBGB
HBHB
HBJB

TYPE OF WALL

Wood Studs or Solid Wood

Hollow Plaster
Sheet Metal
Cement or Masonery

I

80

105
185
260

FASTENER RECOMMENDATION

6 FASTENERS REQUIRED
8 FASTENERS REQUIRED

l/4” Lag Screws, 1” minimum length
l/4” Molly Bolts or Toggle Bolts, 3” minimum length
l/4” Thread Forming Screws, l/2” minimum length
l/4” Lead Type Anchor and Bolts, l-l/2” minimum length

2

(Models HBAB & HBDB)
(Models HBGB, HBHB & HBJB)

,

INSTALLATION

INSTALL STEAM DISTRIBUTOR PIPE

1. Steam distributor pipe must be mounted on a
plumb surface. When mounted on a plumb

surface the standard distributor pipe is in­clined upward. This is required so the con­densate which forms in the distributor pipe
will drain to the return line and back to the
unit.

2. 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 clearanceof 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, yet keeps steam
away from the sides of the duct.

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

The steam distributor pipesshould 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.

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 zene 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, zone dampers, elbows
or outlets which may be installed downstream
of the distributor pipe. However, in all cases,
the steam distributor pipes should be located
as far upstream from any such obstruction as

possible.

3. An adhesive backed template is provided for
each distributor pipe. This provides the hole

pattern for mounting of each steam distributor
pipe. Using the template(s), cut necessary
holes in ductwork at desired location of

distributor pipe.

4.

Insert distributor pipe into duct and secure

tightly with four sheet metal screws, not

provided by Carnes.

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

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

Figure A

Figure i3

3

Figure C

DO