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Installation Instructions

379H

Size 450

180R & 240R

Series D

OUTDOOR HEATING AND COOLING UNIT / bPliant

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.

Summary of content (6 pages)

PAGE 1
379H Size 450 180R & 240R Series D Installation Instructions 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 240R379) or with no expansion coil as Model 450-379H.
PAGE 2
-ssl- UNIT SIZE CONNECTION SIZE (COIL) A 7/8 OD (Suction)* -76f180R-379H 5/8 OD (Liquid)* 1-3/8 OD (Suction) 5/8 OD (Liquid) 240R-379H c B 2 ea 6-3/16 2 ea 10-3/16 2 ea 7-3/16 2 ea 10-3/16 D 14-13/16 18-13/16 12-5/8 18-1/2 *Refer to condensing unit for compressor suction and liquid line sizes Approximate Shipping Weights 450-379H—1425 lbs 180R-379H—1460 lbs 240R-379H—1565 lbs ^4 A69420 Figure 2-Dimensional Drawing TABLE I- Ratings and Capacities • Model 450-, 180R-, & 240R-379H Heating I
PAGE 3
SECTION IV. VENTING The vent cap assemblies, including three sheet metal angles, are packaged in the gas control compartment. Installation of these assemblies is as follows: SECTION II. GAS PIPING A separate gas supply line should be installed to run directly from the meter to the heating section. Check your local utility for recommendations concerning existing lines. Choose a supply pipe large enough to keep the pressure loss as low as practical.
PAGE 4
I 2. To check this operation, turn pilot gas valve off manually. The pilots should re-ignite automatically when pilot gas valve is turned on. NOTE; If aluminum conductors are used, the connec tions must be made in accordance with the National Electric Code. Aluminum wire connections must be made with special connectors. In preparing the wire just before installing the connector, all aluminum wire must be “brush-scratched” and the wire coated with a corrosion inhibitor, such as “Pentrox A.
PAGE 5
Water Manometer Temperature Rise When using a water manometer to measure the mani fold pressure, proceed as follows to adjust the gas in put: Models 450-379H, 180R-, and 240R-379 are designed for operation within a temperature rise range of 20 °F to 75°F against an external static pressure up to 1.0 inch water column. 1. Turn off gas to unit. Connect manometer to 1/8inch pressure tap at outlet of gas valve.
PAGE 6
THERMOSTAT 34427 D57(872F) FACTORY WIRING FIELD WIRING — • • — • - MECHANCIAL CONNECTIONS ^ ^ ( ^ ( I I I g ) 0 © © © Q SUBBASE 34427 D59(Q672B) ____________________________ Ó ÓÓÓOOOOO W1 W2 4 G Y1 Y2 R F X ooooooooo UNIT LOW-VOLTAGE TERMINAL STRIP Figure 3-Field Wiring Low-Voltage, Models 450H-, 180R-, 240R-379 1. Blower Motor 2. Contactor 3. Cooling Fan Relay 4. Delay Heating Relay 5. Transformer 6. Gas Pressure Switch 7. Resistor 8. 733 Automatic Pilot 9. Limit Switch 10.