Carnes HBAD Installation Manual

ELECTRONICALLY CONTROLLED STEAM HUMlDlFlERS

DESIGN SERIES “C” & “D”

INSTALLATION, OPERATION

AND MAINTENANCE MANUAL

CARNES COMPANY, P.O. Box 930040,446 S. Main St., Verona, WI. 53593-1499 - Phone: [phone] Fax: [phone]

“ON” Lamp -

“ABNORMAL”

Lamp

Steam Output
Control

“ON-OFF-DRA
Switch

k---v-

Steam Hose

Hose Clamp

r Cylinder

Retaining

Band

- Steam
Cylinder

Optional 1
Circuit
Breakers

Brass Cylinder

Fitting

Photo A

(MODEL HBHD SHOWN)

Drain Solenoid

Valve

FORM 16678-8, Page 1

ISSUED : 9/l 5/88

INSTALLATION

UNPACKING AND INSPECTION

1. An envelope attached to the outside of the cabinet
contains one cabinet key.

2. Open the cabinet and check for concealed ship­ping damage. Report any damage immediately to

the carrier who delivered shipment.

3. The following components are packed in a ship­ping carton for connection when installing
humidifier:

A. Distributor pipe.

6. 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 is an envelope containing the

following items:
A. Steam hose clamps.

B. Condensate return line clamps.
C. Air gap drain fitting.
D. Installation instructions.

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
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 humidifiers are shown
below.

WATER SUPPLY CONNECTION

Use ordinary tap water (20 to 120 psi)
hot water, deionized water, or water that has been
treated by a water softener without consulting the
factory. A 3/8” FPTfitting is provided at the top of the 4
humidifier for connection to tap water supp1y.A shut­off valve, not provided by Carnes, must be installed
just ahead of this fitting.

-DO NOT use

DRAIN LINE CONNECTION

1.

Remove the large nut and plastic gasket located
on the fitting on the bottom of the cabinet
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
‘ie air gap drain fitting before connecting. 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.
Use plumbing material capable of handling hot
water.
package is used, follow instructions included with
the drain water pump package.

Note:

If the drain water pump accessory

(Photo

Table

I - MAXIMUM OPERATING WEIGHT

MODEL

Table

2 - FASTENER RECOMMENDATION

TYPE OF WALL
Wood Studs or Solid Wood

Hollow Plaster
Sheet Metal
Cement or Masonry

POUNDS

D\rain Line

Connection

Photo B

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, 1 l/2” minimum length

(Models HBAD, HCAD, HBDD, HCDD,

HBAC, HCAC, HBDC, HCDC)

(All Other Models)

FORM 16678-B, Page 2

STEAM DISTRIBUTOR PIPE LOCATION

Each steam cylinder in multi-cylinder units requires
a separate steam distributor pipe, steam hose and
condensate return line. The distributor pipes from
one humidifier are intended to serve one duct or

multiple ducts if the pressures are the same. Only
one humidistat is required for each humidifier
as all circuits in multi-cylinder units operate
simultaneously.

In a typical installation the humiditier is located
below the duct as shown in
ommended that the length between the humidifier
cabinet and the steam distributor pipe in the duct be

the minimum possible distance. Refer to

maximum lengths that may be insta!led. The maxi­mum length of steam hose that may be installed as
shown in
over 12 feet refer to

A drain “T”, as shown in
remove condensation that occurs in steam hose
lengths over 12 feet. It is preferable to have the steam
hose rise vertically from the cabinet and then slope

toward the distributor pipe as shown. If sufficient

head room is not available it is possible to install with
an upward slope to the hose.

The standard distribution pipe must never be in­stalled vertically. If air flows are vertical, the steam
distributor pipe should be installed horizon?ally

(Figure

staggered as shown in

Steam distributor pipes must be located on a plumb
surface. 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 pipes should be mounted in the
duct to insure even distribution of steam across the
center portion of the duct. The condensate return line
must always be kept on the bottom. A minimum
clearance of 4” must be maintained between top of
the duct and distributor pipe.

The steam distributor pipes are normally located in
the supply air stream, downstream of the fan. 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 zone dampers. In this case, good distribution of
steam across the entire of the hot deck is very
important.

Figure A

is 12 feet. For steam hose lengths

Figure B.

C). In multi-cylinder units the pipes should be

Figure D.

Figure A.

Figure B,

It is rec-

Table 3

must be used to

for

Figu w

Table 3

(

- MAXIMUM STEAM HOSE LENGTHS

FORM 16678-B, Page 3