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nstallation Instructions

GAS-FIRED AIR CONDITIONER

Installation of the Model 451 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 irtstructiofl. Read entire instruction before

starting installation.

Position unit and remove wooden shipping crate

base as shown in Figure 1.

1. Saw wood stringers as shown.

2. Remove unit access panels and remove 3 ship-

ing bolts from crate base.

3. Tilt one end of unit and remove half-section of

crate base; then reiiiove remaining section while

tilting the other end.

I. LOCATE AND MOUNT ABSORPTION UNIT

The absorption unit may be located at ground lével

or on the roof. Consult local codes for information

concerning 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. A poured concrete slab, minimum 4" thick, is

recommended for ground installation.

4. On roof installations leave süfficieíit clearance

between unit base and roof top for proper air circu-

451

SERIES A

■

FMijJTTJjyMl

39451D1

5. A unit supported on concrete blocks will require

a block at each corner plus a fifth block under the

front, midway betweèn the front corner blocks.

B. CLEARANCES

See Figures 2 and 3 for typical locations.

1. Absorption unit should have a minimum clear

ance of 2 feet on all sides from any adjacent ob

struction.

2. Avoid locating the unit where hot condenser

discharge air can impinge on nearby obstructions

and mix with the inlet air supply. The condenser

air discharges upward at a small angle toward the

front of the unit. With the condenser facing the

wall the unit can be located at, or outside of the

, lation.

plumb line from any over-hang.

EH 451

Cancels: New

Effective 2/1/64,

Summary of content (13 pages)

PAGE 1
451 nstallation Instructions SERIES A ■ GAS-FIRED AIR CONDITIONER 39451D1 Installation of the Model 451 Gas Air Conditioning Absorption unit consists of the following steps: I. II. III. IV. V. VI. VII. VIII. IX. FMijJTTJjyMl I Locate and mount absorption unit. Connect chilled water lines. Electrical connections. Gas connections. Charge system with water. Check-out and Operation. Adjust gas input. Balance system. Purge Non-Condensibles.
PAGE 2
D Model A B C 36-451 46 31 52 9-1/16 54-451 55 38 59 11-1/16 Cooling Capacity Heat Input Condenser Air Delivery Water Flow (Min. Required) Max. Frictional Loss Handled by Chiller Pump Max., Elevation of Coil above Chiller Pump and Fan Drive 115V, 60 Cy., 1 Phase Minimum Wire Size * Refrigerant Type Refrigerant Amount Approximate Shipping Wt. EH 451 E 23-9/64 28-3/4 F 26-1/8 32-7/16 36-451 54-451 35,000 110,000 4,500 7.
PAGE 3
TABLE Nominal Pipe Size Inches 3/4 1 1-1/4 Polyethy ene Pipe Size 54 Size 36 40' 150' 530' Allowable Distance* between Coil and Chiller Copper Pipe Galvanized Pipe Size 54 Size 36 Size 36 Size 54 35' 140' 360' — 45' 145' 25' 90' 370' — 40' 100' — 30 ' 90' * Note: Values shown in above table are for one direction only. The total length of pipe from chiller to coil and return would be double the above table values. The above table applies to single unit installations only.
PAGE 4
CLARIFICATION On page 4 of this Instruction under Section III Electric Connections, item 3 should read; 3. Provide a fused disconnect switch within sight of and not more than 50 feet from the absorption unit.
PAGE 5
FOR EH 451 CORRECTION Paragraph 6 on page 4 under Electric Connections should read as follows: 6. Disconnect pump electrical lead at terminal 7 in control box before energizing unit when ready to check field wiring. Do not operate the pump dry. Figure 6 on page 8 is NOT correct.
PAGE 6
C. INSULATION Ill, 1. Insulate supply and return lines separately. 2. Material should be of good quality and be covered with a good vapor barrier. Armaflex or equivalent is recommended. Wall thickness: 1/2" wall thickness - south of 40 ° N. latitude 3/8" wall thickness - north of 40° N. latitude D. HEIGHT OF COIL E. WATER COIL CONNECTIONS 1. If coil is located in warm air stream, do not connect polyethylene pipe directly to coil.
PAGE 7
A wrench-type shut-off valve should be installed in the gas line within sight of, and convenient to, the 451. Provide a ground joint union upstream of the combination regular shut-off, and preferably outside the unit. Install a drip leg trap in the gas supply riser lead ing to the unit. After gas pipe connections have been made, purge the lines and check for leakage. Use a soap and water solution or other such mater ial. Never use matches, candles, flame or other source of ignition to check leakage.
PAGE 8
larger than 20 gallon capacity, add one-half (1/2) package for each additional 10 gallon capacity or fraction thereof. (Consult Bryant distributor for estimating chilled water circuit capacities.) To measure gas input, proceed as follows: 1. Adjust primary air if necessary. 2. Measure the gas input at the meter. Be sure all other gas appliances are turned off. Input at the burners may be increased or decreased slightly by adjustment of the regulator in the burner supply line. 11.
PAGE 9
8. If non-condensibles are present they will follow the initial surge of solution. When solution re appears in quantity, the non-condensibles trapped in the purge pot have been released. 9. Close Valve D. HARD FITTIMG-MAX.2. ADAPTER PLASTIC PIPE The installation should now be complete. ADAPTER HARD FITTING-MAX.2; HARD NIPPLE MAX. LENGTH 4" FREEZING WEATHER PROTECTION 1.
PAGE 10
m cn i 1i POWER SUPPLY 115 VOLTS PILOT iWITCH 5826301 Figure 6 - Unit Wiring Diagram - All Gases
PAGE 11
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PAGE 12
w K ■t^ cn REMOTE FAN RELAY FAN MOTOR 115V 1 c) o PILOT FAN K) OJ RELAY LIMIT cj) c ) -o o-------Q PP TH o 0 o o ¿ MODEL 451 Y G R TERMINAL BLOCK o 0 o o TYPICAL SELF GENERATING FURNACE CONTROL r
PAGE 13
TYPICAL FURNACE WITH MULTI-SPEED TAPPED BLOWER 11- EH 451