Bryant UNIT 379H - Manual

Installation Instructions
379H
Size 450
180R & 240R
Series D
OUTDOOR HEATING AND COOLING UNIT / bPliant
I
39379D35
1/3/72
The Bryant Model 4dO-379H is a heating unit designed
for outdoor installation; either rooftop or at ground
level. It is available with either of two factory-in­
stalled direct expansion coils (Model 180R- or 240R-
379) or with no expansion coil as Model 450-379H.
Model 180R units are equipped for use with R22
refrigerant and provide 180,000-Btuh cooling when
connected with a Bryant Model 180-566 Condensing
Unit. Model 240R units are equipped for use with
R500 refrigerant and provide 240,000-Btuh cooling
when connected with a Bryant Model 240-566 Con­
densing Unit. All tluree models have a heating input of
450.000 Btuh (approximately) for both natural and
propane gas. They are equipped with a two-stage
firing arrangement for operation at a reduced input of
225.000 Btuh.
.! ,Fi L
DO NOT!
IREMOVE
Important-Read Before Installing
Be sure the available gas supply is the same as that
shown on the American Gas Association (A.G.A.)
rating plate. Check the electrical supply to be sure
that voltage, frequency, and phase correspond to that
specified on the unit rating plate.
Check all national, state, and local building codes af­
fecting the installation of this unit. Check all local or­
dinances that could affect the installation of this type
equipment.
WARNING: All access panels must be in place at all
times when unit is in operation.
GENERAL
The design of the unit is certified by the American
Gas Association (A.G.A.) for use with iiatural or pro­
pane gas with the appropriate controls and orifices.
The units are designed specifically for outdoor in­
stallation, either at rooftop or ground level.
Installation of the unit consists of the following:
I. Locating the Unit
II. Gas Piping
III. Duct Connection
IV. Venting
V. Coil Connection (Models 180R- and
240R-379H)
VI. Electrical Connections
VII. Start-up and Adjustments
VIII. Maintenance
Figure 1
SECTION I. LOCATING THE UNIT
Extreme caution should be observed to prevent dam­
age when moving the unit. Maintain the unit in an up­
right position at all times during rigging and moving
operations. To facilitate lifting and moving opera­
tions, place the unit in an adequate rope or ca­
ble sling.
CAUTION: Protect the top and sides of the unit from
possible damage from rigging sling.
Rooftop Installation
Level the unit on a base situated a minimum of 6 in­
ches above the roof to insure proper drainage. Consult
local and state building codes for installation require­
ments. Be assured the roof construction will support
the weight of the equipment.
Ground Level Installation
The unit should be placed on a level concrete slab (4-
inch minimum thickness); level the unit on the slab
with 1-inch clearance to insure proper drainage.
Combustible Clearances
Minimum clearances are: 6 inches from rear or duct
side, 24 inches on all other sides, and 0 inch on the
bottom. These clearances permit the use of combus­
tible materials for supports. The top of the unit must
be kept clear at all times.