Bryant 450D User Manual

Installation Instructions

450D

Installation of the Model 450D Gas Air Conditioning
Absorption unit consists of the following steps:

I. Locate and mount absorption unit.

II. Connect chilled water lines.
III. Electrical connections.
IV. Gas connections.

V. Charge system with water.
VI. Check-out and Operation.

VII. Adjust gas input.

VIII. Balance system.

IX. Purge Non-Condensibles.

Each of the above steps is discussed in detail in this
instruction. Read entire instruction before starting in
stallation.

bPi|ont

I

ft

EPN 39450D1

Remove four shipping bolts holding absorption unit to
crate base before placing unit on permanent mounting
slab.

NOTE: Unit is shipped with condenser fan guard in
verted. Remove, place with convex side up and fasten.

I. LOCATE AND MOUNT^ABSORPTION UNIT

The absorption unit may be located at ground level'or
on the roof. Consult local codes for information con
cerning proximity to property lines, height above roof,
obstructions, etc.

A, MOUNTING BASE '

1. Use non-combustible materials.

2. Base should be large enough that unit will not
overhang.

3. Poured concrete slab, minimum 4” thick, recom
mended for ground installation. On roof installa
tions a metal plate is satisfactory. Leave 4” to
8” clearance between roof top and metal plate.

4. Mounting base should not obstruct drain holes
in base angle of unit. Drainage required to dis
pose of rain, melting snow, etc.

Certified in accordance cvith

A. G. A. APPROVED

B. CLEARANCES

See Figures 1 and 2 for typical locations.

1. Absorption unit should have a minimum clearance
of 2 feet on all sides from any adjacent obstruc
tion.

2. Avoid overhead obstruction. Place unit at least
2 feet from plumb line of any overhang.

3. Avoid locating the unit where hot condenser dis
charge air can impinge on nearby obstruction and
mix with the cooler inlet air. This is particularly
important when two units are placed side by side.

A.R.I. standard 2d0—58.

CERTIFICATION APPLIES
ONLY WHEN USED WITH

PROPER COMPONENTS AS
SPECIFIED BY MANUFAC
TURER.

EH 450-2

CANCELS: EH 450-1

EFFECTIVE 12/1/63

DIMENSIONS

RATINGS AND CAPACITIES

ELECTRICAL CONNECTION

WATER outlet'

O

GAS CONNECTION

SIZE

DIMENSIONS

MODEL
Cooling Capacity
Heat Input
Gas Connection Size

Condenser Air Delivery
Water Flow (Min. Required)
Max. Frictional Loss Handled by Chiller Pump
Max. Elevation of Coil Above Chiller
Condenser Fan Motor

115V, 60 Cy., 1 Phase

Pump

115V, 60 Cy., 1 Phase
Minimum Wire Size*
Refrigerant Type 717

Approximate Shipping Weight
*NOTE: Satisfactory where distance, measured along wire path, between unit and connection into main

panel does not exceed 100 ft. Where distances are longer, wire sizes should be increased ac
cordingly.

36
54 46-3/8

A

40-3/8 48 53

B

56

C D

60

5-5/16 15-1/2
7-1/16 18-3/8

Amount

E WATER INLET

1
1-1/4

36-450 D 54-450 D
BTUH 34,000 52,000
BTUH
INCHES

CFM
GPM 7.5
FT HEAD

FT 22 22

HP

HP
AWG 14 12

LB
LB

120,000

WATER OUTLET

1/2

4,500

23

1/3

1/8

24 42

1044 1544

1
1

180,000

3/4

6,700

11

20

1/2

1/8

717

EH 450

-2-

SLEEPING

AVOID
OPEN
WINDOWS

QTRS.

TABLE I . DISTANCE BETWEEN COIL AND CHILLER

LIVING
AREA

AVOID OVERHANG

Figure 2

□

AVOID

“ELLS"

GARAGE

7 PREVWUNG

WIND

GOOD
LOCATION

NOMINAL PIPE SIZE POLYETHYLENE

3/4

1
1-1/4
M/2

NOTES Values shown are for one direction only. Multiply by two to obtain the total length
of pipe from chiller to coil and return.

* Pipe lengths exceeding 75 feet may require additional chilled water additive. (See Section V,

this instruction.

II. CONNECT CHILLED WATER LINES

A. MATERIALS

Refer to section on “Cold Weather Protection” at the

end of this instruction.

1. Piping
a. Polyethylene Plastic Pipe - use medium density

flexible pipe whose wall thickness approximates

Schedule 40 pipe (Commercial Standard CS 197-

60). Pipe must be virgin plastic. Do not use

pipe manufactured from re-claimed plastic.
b. Copper - satisfactory substitute.
c. Galvanized - satisfactory substitute.

2. Fittings
a. Nylon - use when possible.

b. Brass - satisfactory substitute.

c. Galvanized - satisfactory substitute.

Feet

36 54

40

—

150 ^ 45

530 ^

145 *

1585 ^ 310 *

B. PIPE LENGTH AND DIAMETER

Table I shows maximum length of pipe of different
diameters that can be used between the pump dis
charge and the coil inlet and still maintain minimum
allowable (design) water flow rate.

1. Multiply table values by two to obtain the total

2. Length is measured along the pipe path and

3. Lengths shown in Table I are based on using a

COPPER

36

35

140 ^

360 ^

815a^

Feet

54 36 . 54

—

40

100^

205^

GALVANIZED

Feet

25

90 ^

—

30
370 ^ 90 ^
770 ^ 190 ^

length of pipe from chiller to coil and return.

therefore includes vertical distance between the
water coil and the chiller.

total of eight elbows in the entire water line

(chiller to coil and return). Lengths are predi
cated on the use of a Bryant matching water coil.
For greater distances use larger pipe or add a
pump.

EH 450

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